The Library
1530 papers on microsampling and monitoring, each with a finding paraphrased to our standard and labelled in one vocabulary. Every entry links to a legitimate copy; nothing is copied from an abstract.
Papers 501–600 of 757 labelled “validation”, newest first.
2021
Handelsman et al. validated a direct LCMS assay for pregnanediol glucuronide in dried urine spots without deconjugation. In ten women monitored across one menstrual cycle, using two or three consecutive first-void samples reduced false-negative ovulation detection from eight per cent to 2.6 per cent and 1.9 per cent respectively, enabling accurate home-based fertility assessment.
Direct measurement of pregnanediol 3-glucuronide (PDG) in dried urine spots by liquid chromatography-mass spectrometry to detect ovulation — Handelsman et al., The Journal of steroid biochemistry and molecular biology (paywalled)
- urine
- dried
- first-void
- self-collection
- validation
- fertility
- hormones
- steroids
2021
Dried blood spot specimens collected at home without medically trained personnel showed agreement with conventional venous blood when analysed by electrochemiluminescence immunoassay, with stable antibody readouts over more than 200 days of dry dark storage and consistent results in individuals tested twice within 10 months post-infection.
Detection of anti-SARS-CoV-2 antibodies in dried blood spots utilizing manual or automated spot extraction and electrochemiluminescence immunoassay (ECLIA) — Knoop et al., Analytical science advances
- blood
- dried
- dbs
- self-collection
- validation
- venous-agreement
- serology
2021
Capillary dried blood spot samples analysed with the Roche Elecsys anti-SARS-CoV-2 assay on COBAS 6000 systems agreed with paired serum results in 98.9% of cases and remained accurate at 86.7% after 9 days, supporting their use for decentralised COVID-19 serosurveillance and large-scale screening.
Analysis of SARS-CoV-2 antibodies from dried blood spot samples with the Roche Elecsys Immunochemistry method — Fontaine & Saez, Practical laboratory medicine
- blood
- dried
- capillary
- dbs
- self-collection
- validation
- venous-agreement
- serology
2021
The study validated a VAMS-based LC-MS/MS method for measuring tamoxifen and its active metabolites in breast cancer patients, showing good accuracy, precision and stability at room temperature for 30 days. This supports decentralised therapeutic drug monitoring in oncology by enabling reliable, patient-collected sampling.
Volumetric Absorptive Microsampling as a New Biosampling Tool for Monitoring of Tamoxifen, Endoxifen, 4-OH Tamoxifen and N-Desmethyltamoxifen in Breast Cancer Patients — Maggadani et al., Drug design, development and therapy
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
- oncology
2021
The study found that daclizumab and trastuzumab showed encouraging recovery from VAMS after short term storage at room temperature and long term storage at -80 degrees Celsius, supporting the use of VAMS for therapeutic drug monitoring of biologics in decentralised settings.
Whole blood stability evaluation of monoclonal antibody therapeutics using volumetric absorptive microsampling — Li et al., Bioanalysis (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
- biologics
2021
In 17 nursing home residents, anterior nasal swabs detected SARS-CoV-2 most often in the first ten days after diagnosis, while saliva and oropharyngeal swabs remained PCR-positive longer (up to 48 days). Only nasal and oropharyngeal specimens yielded replication-competent virus, suggesting saliva's prolonged positivity represents residual RNA, which matters for decentralised testing because using saliva could lead to unnecessary isolation if PCR detection occurs after active viral shedding has ceased.
A Comparison of Less Invasive Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Diagnostic Specimens in Nursing Home Residents-Arkansas, June-August 2020 — Gable et al., Clinical infectious diseases : an official publication of the Infectious Diseases Society of America
- saliva
- validation
- serology
2021
Self-collected saliva and anterior nasal swabs detected SARS-CoV-2 with sensitivities of 68% and 59% respectively compared with healthcare worker-collected nasopharyngeal swabs. When samples were taken 3-7 days after symptom onset, sensitivities rose to 85% for saliva and 80% for anterior nasal swabs, showing that timing and patient characteristics significantly influence diagnostic accuracy in decentralised testing.
Effects of Patient Characteristics on Diagnostic Performance of Self-Collected Samples for SARS-CoV-2 Testing — Smith-Jeffcoat et al., Emerging infectious diseases
- saliva
- self-collection
- validation
2021
Residual pooled rectal/pharyngeal/first-void urine specimens and residual rectal swabs showed 89% and 88% concordance respectively with dedicated anal swabs for HPV DNA detection, with marginally higher positivity rates. This demonstrates that leftover STI test material can reliably be repurposed for HPV prevalence monitoring in men who have sex with men, enabling decentralised public health surveillance without additional patient burden.
Performance of human papillomavirus DNA detection in residual specimens taken for <i>Chlamydia trachomatis</i> and <i>Neisseria gonorrhoeae</i> nucleic acid amplification testing in men who have sex with men — Nugent et al., Sexually transmitted infections (paywalled)
- urine
- first-void
- validation
- hpv
- sti
2021
The study validated a sensitive LC-MS/MS method to measure rosuvastatin in 10 µL of blood collected using VAMS, with acceptable accuracy and precision across multiple days. Rosuvastatin remained stable in VAMS samples for 10 days at room temperature without pH buffer, supporting its use in decentralised clinical trials and patient-centric therapeutic drug monitoring.
Validation of LC-MS/MS method for determination of rosuvastatin concentration in human blood collected by volumetric absorptive microsampling (VAMS) — Moon et al., Translational and clinical pharmacology
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
2021
Volumetric absorptive microsampling with Mitra devices permits minimally invasive, finger-prick blood collection for therapeutic drug monitoring of antiseizure medications without trained staff. The review concluded that stability, accuracy and precision are acceptable for specific drugs and haematocrit effects are minimised, but evidence is drug-specific and further validation is required for decentralised clinical use.
Therapeutic Drug Monitoring of Antiseizure Medications Using Volumetric Absorptive Microsampling: Where Are We? — D'Urso et al., Pharmaceuticals
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
- haematocrit
2021
Dried capillary blood collected with volumetric absorptive microsampling provides linear agreement with serum for lamotrigine, lacosamide and levetiracetam, enabling conversion factors to estimate serum trough concentrations for therapeutic drug monitoring.
Therapeutic Drug Monitoring of Lamotrigine, Lacosamide, and Levetiracetam in Dried Capillary Blood-Determination of Conversion Factors for Serum-Based Reference Ranges — Klimpel et al., Therapeutic drug monitoring (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
2021
Volumetric absorptive microsampling (VAMS) achieved excellent correlation with conventional venous sampling for iohexol quantification and glomerular filtration rate (GFR) derivation in twenty children, showing minimal bias overall. Accuracy was lower for GFR values under 60 mL/min/1.73 m², but the method proved stable for 245 days and valid across a 20–60 % haematocrit range, offering a viable decentralised alternative for paediatric renal function assessment.
Volumetric absorptive microsampling as alternative sampling technique for renal function assessment in the paediatric population using iohexol — Dhondt et al., Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (paywalled)
- blood
- dried
- vams
- validation
- venous-agreement
- pediatric
- haematocrit
2021
Targeted metabolomics using one‑drop capillary blood microsampling with hemaPEN showed satisfactory stability, precision, trueness and accuracy across five time points around exercise, and detected expected changes in lactic acid, TCA cycle intermediates and several amino acids; samples were quicker and easier to store and process than classical plasma or serum from venepuncture, supporting decentralised fluxomics monitoring.
Blood Microsampling to Monitor Metabolic Profiles During Physical Exercise — Nix et al., Frontiers in molecular biosciences
- blood
- capillary
- validation
- metabolome
2021
This systematic review found that chlamydia screening may reduce pelvic inflammatory disease in young women, and that testing for chlamydia and gonorrhea is accurate using urine samples and self-collected vaginal specimens, with self-collected samples showing 90 to 100 percent sensitivity compared with clinician-collected samples.
Screening for Chlamydial and Gonococcal Infections: A Systematic Review Update for the U.S. Preventive Services Task Force — Cantor et al., Agency for Healthcare Research and Quality (US), Rockville
- urine
- self-collection
- validation
- sti
2021
A surrogate-analyte LC-MS/MS method for cortisol in whole blood was validated, showing linearity from 0.5 to 500 ng/mL with acceptable accuracy and precision per regulatory guidance. Evaluation of patient samples demonstrated comparable cortisol concentrations in whole blood and plasma, indicating that whole blood sampling could support patient-centric, at-home collection in decentralised trials and clinical diagnostics.
A validated surrogate analyte LC-MS/MS assay for quantification of endogenous cortisol in human whole blood — Agrawal et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- blood
- liquid
- validation
- hormones
- cortisol
- dct
2021
Patient-collected midturbinate nasal swabs matched provider-collected nasopharyngeal swabs with 100% sensitivity for SARS-CoV-2 RNA, while saliva showed 96.8% sensitivity; pretreating saliva with proteinase K eliminated invalid results. These findings validate self-collection for decentralised infectious disease screening.
Evaluation of Self-Collected Midturbinate Nasal Swabs and Saliva for Detection of SARS-CoV-2 RNA — Boerger et al., Journal of clinical microbiology
- saliva
- self-collection
- validation
- serology
2021
A quantitative dried blood spot device (Capitainer qDBS) combined with the Roche Elecsys anti-SARS-CoV-2 S immunoassay tracked anti-spike antibody development after two doses of the Pfizer vaccine, with the second dose producing a roughly hundredfold stimulation that peaked at two weeks and fell to 65 percent by three months. The bias between plasma and DBS was variable across both a 14-volunteer vaccination cohort and a 200-patient clinical cohort, yet DBS proved sufficiently sensitive for prolonged immune-status monitoring without venous draws.
Use of Quantitative Dried Blood Spots to Evaluate the Post-Vaccination Level of Neutralizing Antibodies against SARS-CoV-2 — Marchand et al., Life
- blood
- dried
- dbs
- qdbs
- self-collection
- validation
- venous-agreement
- serology
2021
The Xpert CT/NG test demonstrated high sensitivity and specificity for detecting Chlamydia trachomatis and Neisseria gonorrhoeae in first-void urine and cervical swab specimens against reference methods. The 90-minute point-of-care turnaround time could enable decentralised, patient-centric testing with prompt treatment for sexually transmitted infections.
Clinical Performance of the Xpert<sup>®</sup> CT/NG Test for Detection of <i>Chlamydia trachomatis</i> and <i>Neisseria gonorrhoeae</i>: A Multicenter Evaluation in Chinese Urban Hospitals — Han et al., Frontiers in cellular and infection microbiology
- urine
- first-void
- validation
- sti
2021
Saliva self-collection achieved 97 per cent agreement with nasopharyngeal swabs for SARS-CoV-2 detection in 128 paired specimens using CDC qPCR chemistry. In asymptomatic populations, saliva screening of 466 community participants yielded a 1.07 per cent positivity rate, nearly identical to the 1.12 per cent rate from 8,461 nasopharyngeal swabs in preoperative patients, supporting saliva as a noninvasive alternative for decentralised diagnostic programmes.
Comparison of SARS-CoV-2 PCR-Based Detection Using Saliva or Nasopharyngeal Swab Specimens in Asymptomatic Populations — Fan et al., Microbiology spectrum
- saliva
- self-collection
- validation
- serology
2021
Saliva self-collection with TRIzol extraction matched nasopharyngeal swab performance for SARS-CoV-2 detection while enabling room-temperature storage without specialised tubes, offering a lower-cost decentralised option suitable for large-scale screening programmes.
Development of an alternative saliva test for diagnosis of SARS-CoV-2 using TRIzol: Adapting to countries with lower incomes looking for a large-scale detection program — Miranda-Ortiz et al., PloS one
- saliva
- liquid
- self-collection
- validation
- economics
- serology
2021
Preanalytical variables significantly affect therapeutic drug monitoring accuracy, where traditional dried blood spots face challenges with haematocrit bias and filter paper fragility. Volumetric absorptive microsampling provides a fixed-volume alternative that overcomes haematocrit dependency and facilitates self-collection workflows.
Review of the Preanalytical Errors That Impact Therapeutic Drug Monitoring — Peck Palmer & Dasgupta, Therapeutic drug monitoring (paywalled)
- blood
- dried
- vams
- dbs
- validation
- tdm
- haematocrit
2021
Saliva RT-qPCR, RT-LAMP, spectroscopy and ELISA detect SARS-CoV-2 with high sensitivity in early infection and asymptomatic adults compared with nasopharyngeal swabs. Patient-centric self-collection guided by telemedicine reduces contagion risk for staff and enables decentralised screening, but the authors note that further clinical validation is still needed.
Evaluation of saliva as a complementary technique to the diagnosis of COVID-19: a systematic review — Sagredo-Olivares et al., Medicina oral, patologia oral y cirugia bucal
- saliva
- self-collection
- validation
- serology
2021
In asymptomatic adults, self-collected random oropharyngeal saliva detected SARS-CoV-2 more frequently than healthcare worker-collected nasopharyngeal and oropharyngeal swabs (92.3% versus 73.8%). This supports saliva as a patient-centric specimen for decentralised COVID-19 surveillance, reducing healthcare worker exposure while improving detection rates.
COVID-19 screening test by using random oropharyngeal saliva — Rao et al., Journal of medical virology
- saliva
- self-collection
- validation
- serology
2021
Parent-collected nasal swabs from children with respiratory infections showed 91% sensitivity and excellent agreement with nurse-collected samples for detecting viral and bacterial pathogens by PCR, whereas parent-collected saliva swabs were substantially less sensitive at 69% for viruses and 78% for bacteria. This supports decentralised paediatric diagnosis using nasal self-sampling, reducing healthcare burden while maintaining accuracy.
Prospective Study of the Performance of Parent-Collected Nasal and Saliva Swab Samples, Compared with Nurse-Collected Swab Samples, for the Molecular Detection of Respiratory Microorganisms — Woodall et al., Microbiology spectrum
- saliva
- self-collection
- validation
- pediatric
- serology
2021
The study validated a VAMS method for measuring ten antihypertensive drugs in finger prick blood, showing acceptable accuracy and precision for most analytes, though concentrations in VAMS samples cannot be used interchangeably with plasma and require specific reference ranges. This supports decentralised therapeutic drug monitoring using patient-centric microsampling.
Evaluation and analytical applicability of a novel volumetric absorptive microsampling strategy for adherence monitoring of antihypertensive drugs by means of LC-HRMS/MS — Jacobs et al., Analytica chimica acta (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
2021
Nineteen healthy adults showed high compliance to a three-day home salivary sampling protocol, with 95% collecting the correct number of samples. Morning cortisol and cortisone profiles had moderate reproducibility, requiring three to four days of sampling to achieve high reliability, indicating that home-based protocols can support decentralised stress-hormone monitoring.
Feasibility of home-based sampling of salivary cortisol and cortisone in healthy adults — Sørensen et al., BMC research notes
- saliva
- self-collection
- validation
- hormones
- cortisol
2021
The study developed and validated an LC-MS/MS method for moxidectin and showed that capillary Mitra® microsampling in Strongyloides-infected adults yielded pharmacokinetic profiles in close agreement with venous sampling, with identical time to maximal concentration of 4.0 hours and similar maximal concentrations of 83.9–88.5 ng/mL. This demonstrates the method and device are suitable for therapeutic drug monitoring of anthelmintics in decentralised field settings.
Development and validation of an LC-MS/MS method for the quantification of the anthelmintic drug moxidectin in a volumetric absorptive microsample, blood, and plasma: Application to a pharmacokinetic study of adults infected with Strongyloides stercoralis in Laos — Hofmann et al., Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
2021
VAMS coupled with LC-MS/MS showed good correlation with conventional serum sampling for monoclonal antibody pharmacokinetics in rhesus monkeys, but a subsequent clinical study revealed that EDTA anticoagulant in standard and quality control samples caused anomalous internal standard responses in patient fingerstick samples, compromising accuracy. The authors recommend specific best practices during method development and validation to detect such anticoagulant effects early before deploying VAMS in clinical studies.
Volumetric absorptive microsampling (VAMS®) in therapeutic protein quantification by LC-MS/MS: Investigation of anticoagulant impact on assay performance and recommendations for best practices in method development — Gao et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
- biologics
2021
The study compared VAMS capillary finger prick samples with venous liquid and venous VAMS samples from 50 healthy volunteers for thiamine diphosphate measurement, finding 94 to 100 per cent of results within 20 per cent of their mean across all comparisons with no significant bias. VAMS microsamples also remained stable when sent through regular post without affecting results, supporting their use for decentralised thiamine status assessment in both developed and remote settings.
Volumetric absorptive microsampling (VAMS) as a reliable tool to assess thiamine status in dried blood microsamples: a comparative study — Verstraete & Stove, The American journal of clinical nutrition (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- venous-agreement
- dct
- biomarkers
2021
Urine self-sampling for HPV detection showed good agreement with clinician-collected cervical samples (Kappa 0.72) under optimised conditions of 40 mM EDTA preservative, storage at 25°C, and processing within 72 hours. With a cost of USD 1.10 and high acceptability among women and healthcare workers, this method offers a practical decentralised screening approach for resource-limited settings.
Performance of an affordable urine self-sampling method for human papillomavirus detection in Mexican women — Hernández-López et al., PloS one
- urine
- self-collection
- validation
- acceptability
- economics
- hpv
- sti
2021
Protti and colleagues developed and validated a VAMS-based workflow for enantioselective analysis of clenbuterol in urine microsamples. The method achieved good linearity, a limit of quantification of 0.3 ng/mL, and 87% extraction yield, supporting its potential for decentralised doping control and toxicology screening.
VAMS and StAGE as innovative tools for the enantioselective determination of clenbuterol in urine by LC-MS/MS — Protti et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- urine
- vams
- validation
- doping
- toxicology
2021
A VAMS method for 24 mycotoxins was validated against FDA and European Commission guidelines, showing no haematocrit bias and acceptable stability for 21 days at room temperature. Comparison with liquid whole blood from 20 samples revealed no missed exposed cases and comparable levels of key mycotoxins, supporting VAMS as an alternative to venous sampling in resource-limited settings.
Volumetric Absorptive Microsampling as an Alternative Tool for Biomonitoring of Multi-Mycotoxin Exposure in Resource-Limited Areas — Vidal et al., Toxins
- blood
- dried
- vams
- validation
- venous-agreement
- haematocrit
- toxicology
2021
The authors validated an LC-MS/MS method for measuring thiamine diphosphate in dried blood collected by VAMS, achieving accuracy within 6.5% bias and imprecision below 13% CV. The method was unaffected by haematocrit variation and showed superior stability, with samples remaining stable for one week at 60°C or high humidity and for at least one month at room temperature, enabling thiamine screening without cold chain logistics.
Patient-Centric Assessment of Thiamine Status in Dried Blood Volumetric Absorptive Microsamples Using LC-MS/MS Analysis — Verstraete & Stove, Analytical chemistry (paywalled)
- blood
- dried
- vams
- validation
- haematocrit
- biomarkers
2021
Capillary blood collected by fingerstick with the Mitra volumetric absorptive microsampling device showed near identical sensitivity and specificity for SARS-CoV-2 antibodies compared with venous serum when analysed with the Roche Elecsys assay. This validation enables decentralised, patient-centric serology testing for remote or at-home use and large-scale community seroprevalence studies.
Remote Fingerstick Blood Collection for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Antibody Testing — Garcia-Beltran et al., Archives of pathology & laboratory medicine (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- self-collection
- validation
- venous-agreement
- serology
2021
This proof-of-concept study compared VAMS and dried blood spot microsamples with fluid blood for untargeted lipidomic profiling using high-resolution LC-MS/MS, finding that VAMS is a viable option for untargeted lipidomics with the advantage of haematocrit independence over traditional dried blood spots.
Volumetric Absorptive Microsampling of Blood for Untargeted Lipidomics — Marasca et al., Molecules
- blood
- dried
- vams
- dbs
- neoteryx-mitra
- validation
- haematocrit
- biomarkers
2021
Capillary blood collected by fingerstick showed near-perfect correlation with venous samples for HbA1c (R² = 0.993), with 96.7% of paired results differing by no more than 0.2%. Most participants found the kit easy to use at home, indicating potential for decentralised diabetes monitoring when in-person visits are impractical.
Comparison of central laboratory HbA1c measurements obtained from a capillary collection versus a standard venous whole blood collection in the GRADE and EDIC studies — Nathan et al., PloS one
- blood
- liquid
- capillary
- validation
- venous-agreement
- acceptability
- dct
2021
Dried urine microsampling with volumetric absorptive microsampling and dried urine spot improved the stability of peptide hormones and growth factors during drying, storage and transport, enabling reliable LC-MS/MS quantitation for anti-doping testing.
Enhanced urinary stability of peptide hormones and growth factors by dried urine microsampling — Protti et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- urine
- dried
- vams
- validation
- hormones
- doping
- toxicology
2021
A VAMS method for quantifying 13 antipsychotics in finger prick blood was validated across three haematocrit values, showing coherent results with matched plasma samples. Five antipsychotics degraded after one week at room temperature, indicating stability limits for decentralised adherence monitoring.
Development, validation, and application of a quantitative volumetric absorptive microsampling-based method in finger prick blood by means of LC-HRMS/MS applicable for adherence monitoring of antipsychotics — Jacobs et al., Analytical and bioanalytical chemistry
- blood
- dried
- vams
- validation
- tdm
- haematocrit
2021
Saliva self-collection for SARS-CoV-2 detection showed 87.8% sensitivity and 97.1% specificity against nasopharyngeal swabs in 1220 patients, offering a patient-centric alternative with higher acceptability and virtually painless collection, though requiring sample fluidisation. Oral-self sampling swabs were preferred by most patients and also virtually painless, but the 61.1% sensitivity was too low for reliable decentralised diagnostics.
Performances, feasibility and acceptability of nasopharyngeal swab, saliva and oral-self sampling swab for the detection of severe acute respiratory syndrome coronavirus 2 — Plantamura et al., European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology
- saliva
- self-collection
- validation
- acceptability
- serology
2021
This review finds that sensitive assays and novel microsampling designs have largely overcome traditional dried blood spot limitations, establishing feasibility for routine therapeutic drug monitoring. Patient self-sampling remains uncommon but feedback is largely positive, indicating microsampling will become increasingly important in decentralised care.
Microsampling Devices for Routine Therapeutic Drug Monitoring-Are We There Yet? — Morgan, Therapeutic drug monitoring (paywalled)
- blood
- dbs
- volumetric
- validation
- acceptability
- tdm
2021
Direct RT-qPCR on self-collected raw saliva detected SARS-CoV-2 with 95.7% sensitivity and 100% specificity; only 0.6% of 2709 samples were invalid, and the method processed up to 384 samples in under two hours, offering a rapid, scalable approach for community-wide screening.
Validation and implementation of a direct RT-qPCR method for rapid screening of SARS-CoV-2 infection by using non-invasive saliva samples — Brotons et al., International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases
- saliva
- liquid
- self-collection
- validation
- serology
2021
Native saliva and gargle lavage demonstrated high diagnostic sensitivity for SARS-CoV-2 at 92.8% and 89.1% respectively in self-collected samples from symptomatic adults. Nasal swabs achieved comparable results but proved difficult for 16.6% of participants, while tongue swabs and chewed cotton pads were significantly less sensitive, indicating saliva or gargle lavage are optimal for decentralised screening.
Self-Collected Samples to Detect SARS-CoV-2: Direct Comparison of Saliva, Tongue Swab, Nasal Swab, Chewed Cotton Pads and Gargle Lavage — Kohmer et al., Journal of clinical medicine
- saliva
- self-collection
- validation
- serology
2021
Modified pooled sampling using gargle and first-void urine achieved sensitivities of 94.2% for Chlamydia trachomatis and 98.3% for Neisseria gonorrhoeae with near-perfect concordance to single-site testing, supporting its use as a decentralised screening approach in asymptomatic men who have sex with men.
Modified self-obtained pooled sampling to screen for <i>Chlamydia trachomatis</i> and <i>Neisseria gonorrhoeae</i> infections in men who have sex with men — Ando et al., Sexually transmitted infections (paywalled)
- urine
- first-void
- self-collection
- validation
- sti
2021
Capillary blood collected with the Neoteryx Mitra device showed a high correlation with venous samples for tacrolimus monitoring in transplant recipients, but yielded concentrations that were on average 22.5% higher. This minimally invasive method offers a convenient alternative to venepuncture for therapeutic drug monitoring, provided the consistent positive bias is accounted for in clinical interpretation.
Validation of a Capillary Dry Blood Sample MITRA-Based Assay for the Quantitative Determination of Systemic Tacrolimus Concentrations in Transplant Recipients — Undre et al., Therapeutic drug monitoring
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
- immunosuppressants
2021
The authors developed and fully validated LC-MS/MS methods for paracetamol and four metabolites in plasma, whole blood and 10 microlitre VAMS dried blood microsamples, including assessment of haematocrit effects on VAMS recovery. Successful analysis of patient samples collected from both venous and capillary blood confirmed the methods are fit for purpose and can support future pharmacokinetic studies using decentralised microsampling.
Determination of paracetamol and its metabolites via LC-MS/MS in dried blood volumetric absorptive microsamples: A tool for pharmacokinetic studies — Delahaye et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- tdm
- haematocrit
2021
This review evaluates saliva, tears and exhaled breath as alternatives to nasopharyngeal swabs for COVID-19 diagnosis, recommending optical spectroscopy and electronic nose techniques for rapid detection of viral biomarkers in these more readily accessible body fluids.
A review on human body fluids for the diagnosis of viral infections: scope for rapid detection of COVID-19 — Adigal et al., Expert review of molecular diagnostics (paywalled)
- saliva
- validation
- serology
2021
Instability of salivary biomarkers after collection and the absence of standardised handling methods are the principal barriers to home-based saliva diagnostics. The review collates preservation strategies for proteins, hormones, and nucleic acids that are essential for reliable decentralised testing.
Stabilization of Salivary Biomarkers — d'Amone et al., ACS biomaterials science & engineering (paywalled)
- saliva
- stabilised
- self-collection
- validation
- biomarkers
2021
A bioanalytical method for tacrolimus quantitation from MITRA capillary blood samples met all FDA and EMA validation criteria, showing accuracy and precision across 1–50 ng/mL. Haematocrit and hyperlipidaemia did not affect quantitation, and samples remained stable for up to 96 days, supporting minimally invasive therapeutic drug monitoring from a fingerprick.
Quantitation of Tacrolimus in Human Whole Blood Samples Using the MITRA Microsampling Device — Undre et al., Therapeutic drug monitoring
- blood
- dried
- vams
- neoteryx-mitra
- validation
- tdm
- immunosuppressants
2021
This review summarises liquid chromatography with tandem mass spectrometry assays using dried blood spots and volumetric absorptive microsampling for quantifying antimicrobial drugs in children, highlighting that VAMS reduces haematocrit bias and offers a viable alternative to traditional plasma sampling for therapeutic drug monitoring.
Microsampling Assays for Pharmacokinetic Analysis and Therapeutic Drug Monitoring of Antimicrobial Drugs in Children: A Critical Review — Moorthy et al., Therapeutic drug monitoring (paywalled)
- blood
- dried
- vams
- dbs
- neoteryx-mitra
- validation
- pediatric
- tdm
- antimicrobials
- haematocrit
2021
Near-infrared spectroscopy predicted haematocrit in dried blood spots with a maximal bias of 0.012 L/L and coefficient of variation of 4.5%. The method demonstrated robustness for capillary finger-prick samples and across various storage conditions, filter paper types and spotted volumes, enabling correction of haematocrit-related bias in quantitative analysis and supporting broader use of patient-centric microsampling.
Near-infrared-based hematocrit prediction of dried blood spots: An in-depth evaluation — Delahaye et al., Clinica chimica acta; international journal of clinical chemistry (paywalled)
- blood
- dried
- capillary
- dbs
- validation
- haematocrit
2021
In 1793 participants, self-taken rectal and pharyngeal swabs matched clinician-taken samples for diagnostic accuracy of gonorrhoea and chlamydia detection. The study demonstrated that most infected men who have sex with men would be missed by urogenital testing alone, supporting extragenital self-sampling as a viable component of decentralised STI screening programmes.
Swab-yourself Trial With Economic Monitoring and Testing for Infections Collectively (SYSTEMATIC): Part 1. A Diagnostic Accuracy and Cost-effectiveness Study Comparing Clinician-taken vs Self-taken Rectal and Pharyngeal Samples for the Diagnosis of Gonorrhea and Chlamydia — Wilson et al., Clinical infectious diseases : an official publication of the Infectious Diseases Society of America (paywalled)
- urine
- self-collection
- validation
- economics
- sti
2021
Among women referred for colposcopy after abnormal cytology, self-collected vaginal samples demonstrated comparable diagnostic accuracy to clinician-collected cervical samples for detecting high-risk HPV and cervical intraepithelial neoplasia grade 2 or worse. Self-collected urine samples were markedly less accurate, indicating vaginal but not urine self-sampling is suitable for decentralised HPV screening.
Performance and Diagnostic Accuracy of Human Papillomavirus Testing on Self-Collected Urine and Vaginal Samples in a Referral Population — Cho et al., Cancer research and treatment
- urine
- self-collection
- validation
- hpv
- sti
2021
A quantitative VAMS method for PEth 16:0/18:1 was developed and validated across two laboratories, showing good comparability (average bias −0.4%, 85% of differences within 20%) and reproducibility over one year; this supports reliable decentralised alcohol monitoring using finger‑prick dried blood microsamples.
Quantitation of phosphatidylethanol in dried blood after volumetric absorptive microsampling — Van Uytfanghe et al., Talanta (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- toxicology
2021
Pooled data from ten clinical studies show saliva detects SARS-CoV-2 with 87% sensitivity and 98% specificity. This supports saliva as a viable specimen for non invasive self collection in decentralised screening in workplaces, schools and homes.
Saliva Exhibits High Sensitivity and Specificity for the Detection of SARS-COV-2 — Warsi et al., Diseases
- saliva
- self-collection
- validation
- serology
2021
Among 174 symptomatic emergency room patients, self-collected saliva identified SARS-CoV-2 in 98% of those positive by nasopharyngeal swab, with excellent agreement (kappa 0.96). Saliva detected one additional pneumonia case and showed higher cycle threshold values, confirming its utility for decentralised infectious disease screening.
Self-collected saliva for SARS-CoV-2 detection: A prospective study in the emergency room — Echavarria et al., Journal of medical virology (paywalled)
- saliva
- self-collection
- validation
- serology
2021
Two feasibility studies assessed low-volume blood sampling for therapeutic drug monitoring. In patients receiving an anti-A therapeutic, drug levels were measured from finger-prick whole blood collected with Neoteryx Mitra and from capillary plasma collected with TASSO OnDemand, and compared with venipuncture samples. The work outlines practical considerations for adopting these patient-centric microsampling methods in decentralised trials and clinical care.
Assessment of low volume sampling technologies: utility in nonclinical and clinical studies — Williams et al., Bioanalysis (paywalled)
- blood
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
- biologics
2021
Evidence from cross-sectional and clinical trial studies over the past year supports saliva as a viable matrix for SARS-CoV-2 RNA detection, offering a non-invasive, self-collection method that can protect frontline staff and identify infections missed by nasopharyngeal swabs. This positions salivary testing as a key tool for decentralised, patient-centric COVID-19 screening.
One-Year Update on Salivary Diagnostic of COVID-19 — Caixeta et al., Frontiers in public health
- saliva
- self-collection
- validation
- serology
2021
Dried blood spots collected by fingerstick from SARS-CoV-2 convalescent and vaccinated individuals showed strong correlation with paired plasma for antibody binding and neutralisation titres. This supports decentralised serology by enabling self-collection and ambient-temperature mailing and storage, overcoming the cold-chain requirements of venous sampling.
SARS-CoV-2 Antibody Binding and Neutralization in Dried Blood Spot Eluates and Paired Plasma — Itell et al., Microbiology spectrum
- blood
- dried
- dbs
- self-collection
- validation
- venous-agreement
- serology
2021
Self-collected oral fluid achieved only 41.6% sensitivity compared with nasal-oropharyngeal swabs for SARS-CoV-2 detection, with positive agreement falling from 44.6% in the first five days after symptom onset to even lower levels thereafter. This demonstrates that saliva self-collection, while feasible for decentralised testing, lacks the sensitivity required for reliable COVID-19 diagnosis, particularly in later disease stages.
Self-Collected Oral Fluid Saliva Is Insensitive Compared With Nasal-Oropharyngeal Swabs in the Detection of Severe Acute Respiratory Syndrome Coronavirus 2 in Outpatients — Manabe et al., Open forum infectious diseases
- saliva
- self-collection
- validation
2021
Self-collected saliva tested by CLEIA achieved 98.2% concordance with RT-qPCR for SARS-CoV-2 detection. A two-step screening strategy using initial CLEIA followed by confirmatory RT-qPCR for intermediate results would require secondary testing in 11-21% of samples, providing a scalable decentralised testing approach.
A novel strategy for SARS-CoV-2 mass screening with quantitative antigen testing of saliva: a diagnostic accuracy study — Yokota et al., The Lancet. Microbe
- saliva
- self-collection
- validation
- serology
2021
The HPLC-MS/MS assay on dried capillary blood collected with VAMS was linear, precise and stable, and showed strong agreement with liquid venous tacrolimus measurements, supporting its use for therapeutic drug monitoring in transplant recipients.
Volumetric absorptive microsampling for the quantification of tacrolimus in capillary blood by high performance liquid chromatography-tandem mass spectrometry — Tron et al., Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
- immunosuppressants
2021
Dried blood spots collected by finger prick from nursing home residents and staff showed sensitivities of 95.0–97.1% and specificities of 97.1–98.8% against venous blood for SARS-CoV-2 IgG antibodies, demonstrating reliable performance even in elderly people with reduced cutaneous microvasculature. This supports decentralised serosurveillance and post-authorisation vaccine studies because DBS can be obtained remotely and stored at room temperature.
Comparison of Dried Blood Spots and Venous Blood for the Detection of SARS-CoV-2 Antibodies in a Population of Nursing Home Residents — Meyers et al., Microbiology spectrum
- blood
- dried
- capillary
- dbs
- validation
- venous-agreement
- serology
2021
Among 596 participants, self-collected saliva achieved 80.3% sensitivity and 99.4% specificity for SARS-CoV-2 compared with nasopharyngeal swabs. Saliva collected one to five days after symptom onset yielded 85.1% positivity, indicating it can support early diagnosis in low-resource and community settings.
Diagnostic Performance of Self-Collected Saliva Versus Nasopharyngeal Swab for the Molecular Detection of SARS-CoV-2 in the Clinical Setting — Uddin et al., Microbiology spectrum
- saliva
- self-collection
- validation
- serology
2021
Saliva swabs demonstrated 89.5% sensitivity and 100% specificity for influenza detection compared with nasopharyngeal swabs, with 97.6% overall agreement. Median cycle threshold values were significantly higher in saliva (33) than in NP specimens (31), yet saliva swabs remain a feasible specimen type that can be easily self-collected with minimal equipment and discomfort for decentralised influenza testing.
Use of Saliva Swab for Detection of Influenza Virus in Patients Admitted to an Emergency Department — Galar et al., Microbiology spectrum
- saliva
- self-collection
- validation
- serology
2021
Pooled sensitivity of 78% and specificity of 89% for high-risk HPV in first-void urine indicate acceptable diagnostic test accuracy for cervical HPV, supporting its use as a non-invasive decentralised screening option.
Diagnostic Test Accuracy of First-Void Urine Human Papillomaviruses for Presence Cervical HPV in Women: Systematic Review and Meta-Analysis — Bober et al., International journal of environmental research and public health
- urine
- first-void
- validation
- hpv
2021
Capillary blood self-sampling showed near-perfect agreement with venous sampling for SARS-CoV-2 IgG detection, achieving a Cohen's kappa of 0.88. Samples remained stable at room temperature for seven days, and 38 of 39 participants successfully collected adequate volumes, supporting its use for decentralised serological testing.
Self-sampling of capillary blood for SARS-CoV-2 serology — Brown et al., Scientific reports
- blood
- liquid
- dried
- capillary
- dbs
- self-collection
- validation
- venous-agreement
- serology
2021
Self-sampled dried blood spots showed 99.20% sensitivity and 98.65% specificity for SARS-CoV-2 serology compared with venous sampling, and 99.87% of unsupervised home DBS cards were analysable, supporting DBS as a valid tool for large scale serosurveys and surveillance in resource limited settings.
A dried blood spot protocol for high throughput analysis of SARS-CoV-2 serology based on the Roche Elecsys anti-N assay — Beyerl et al., EBioMedicine
- blood
- dried
- dbs
- self-collection
- validation
- venous-agreement
- serology
2021
The paper identified that the Zymo DNA/RNA shield preservative paired with the QIAamp Viral RNA Mini Kit extraction yielded more detectable SARS-CoV-2 RNA from stool than the OMNIgene-GUT kit or storage without preservative. This supports decentralised diagnostics by establishing a validated method for preserving and analysing self-collected stool samples, enabling reliable detection of viral shedding for epidemiology and patient management.
Standardized preservation, extraction and quantification techniques for detection of fecal SARS-CoV-2 RNA — Natarajan et al., Nature communications
- stool
- stabilised
- dna-genotek-omnigene
- validation
- serology
2021
Shotgun metagenomics showed the Copan FLOQSwab in an active drying tube had the best technical and compositional reproducibility among five room temperature methods, outperforming RNALater and OMNIgene-GUT, while LifeGuard and a dry BBL swab allowed unpredictable Escherichia outgrowth; in a further 239-sample evaluation the FLOQSwab-ADT maintained performance across -20 °C, room temperature and 50 °C for four weeks, making it an excellent alternative to existing room temperature stabilisation for stool microbiome diagnostics.
Critical evaluation of faecal microbiome preservation using metagenomic analysis — Pribyl et al., ISME communications
- stool
- stabilised
- dna-genotek-omnigene
- validation
- microbiome
2021
Self-collected saliva and buccal swabs showed only moderate agreement with healthcare worker-collected nasopharyngeal swabs for SARS-CoV-2 detection, with positive percent agreement of 66.7% and 56.7% respectively. This suggests they may be useful for initial screening in decentralised settings, but negative results should be confirmed with standard nasopharyngeal sampling to avoid missing infections.
Validation of self-collected buccal swab and saliva as a diagnostic tool for COVID-19 — Ku et al., International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases
- saliva
- self-collection
- validation
- serology
2021
Saliva PCR viral loads were equivalent to nasopharyngeal swab in symptomatic COVID-19 patients, with high agreement and comparable detection sensitivity, supporting saliva as a useful self-collected diagnostic tool.
Equivalent SARS-CoV-2 viral loads by PCR between nasopharyngeal swab and saliva in symptomatic patients — Yokota et al., Scientific reports
- saliva
- self-collection
- validation
- serology
2020
A review contrasting the formats, framing the haematocrit effect, non-uniform spreading and homogeneity limits of DBS as the problems volumetric sampling is designed to solve.
Opportunities and obstacles for microsampling techniques in bioanalysis: special focus on DBS and VAMS — Londhe & Rajadhyaksha, J. Pharmaceutical and Biomedical Analysis (paywalled)
- vams
- blood
- dbs
- haematocrit
- dried
- validation
2020
A direct DUS-versus-VAMS comparison for 13 steroids on the same urine: VAMS gave better precision and recovery and superior one-year room-temperature stability.
Dried urine microsampling coupled to LC-MS/MS for the analysis of unconjugated anabolic-androgenic steroids — Protti et al., Molecules
- vams
- volumetric
- doping
- dried
- steroids
- toxicology
- hormones
- urine
- validation
2020
Urine VAMS quantified doxycycline with 96–106% accuracy and 31-day room-temperature stability, supporting cold-chain-free adherence monitoring.
A validated VAMS-LC-MS/MS method to quantify doxycycline in urine: monitoring malaria-chemoprophylaxis compliance — Penot, Linard & Taudon, J. Analytical Methods in Chemistry
- vams
- tdm
- dried
- antimicrobials
- urine
- validation
2020
Late-night salivary cortisol was a highly sensitive screen, about 97%, for ACTH-dependent Cushing syndrome, but performed poorly for adrenal disease: a validated screening, not confirmatory, test.
Prospective Evaluation of Late-Night Salivary Cortisol and Cortisone in Suspected Cushing Syndrome — Kannankeril et al., J. Endocrine Society
- cortisol
- hormones
- liquid
- validation
- saliva
2020
A multi-institution workshop made the case for a characterised whole-stool reference material so microbiome measurements can be standardised across labs, addressing the absence of defined faecal inputs.
Toward a human whole-stool reference material for metabolomic and metagenomic gut-microbiome measurements — Mandal et al., Metabolomics
- standardised-input
- metabolome
- standards
- microbiome
- metagenomics
- stool
- validation
2020
A study of three children found that the region of stool sampled did not change microbial alpha diversity, while 22 of 176 metabolites varied; homogenising the stool mattered for metabolomics and short room-temperature storage had little effect, which supports simpler home collection protocols within the limits of so small a study.
Impact of sampling regions and storage methods on fecal gut microbiome and metabolome profiles — Liang et al., mSphere
- standardised-input
- metabolome
- microbiome
- pediatric
- stool
- validation
2020
The study found that the OMNIgene ORAL kit produced different microbiome profiles compared to some alternative oral collection methods, particularly Saccomanno's fixative. This matters for decentralised sampling as it shows the choice of a standardised, stabilised collection method is critical for reliable results in remote studies of the oral microbiome.
Comparison of Oral Microbiota Collected Using Multiple Methods and Recommendations for New Epidemiologic Studies — Yano et al., mSystems
- stabilised
- microbiome
- validation
- saliva
2020
This study validated a method using volumetric absorptive microsampling (VAMS) for therapeutic drug monitoring of antidepressants in whole blood and oral fluid. The method showed good extraction yield (84%), precision (relative standard deviation under 15%), and stability (over 85% after three months), with results agreeing well with conventional sampling. By enabling self-collection at home, VAMS simplifies sampling, improves analyte stability, and reduces costs, making decentralised monitoring of antidepressant treatment feasible.
Whole blood and oral fluid microsampling for the monitoring of patients under treatment with antidepressant drugs — Marasca et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- blood
- saliva
- vams
- self-collection
- validation
- tdm
2020
Fingerprick blood collected with Neoteryx Mitra devices showed minimal bias compared to venous sampling for tacrolimus (-5.6%) and creatinine (-6.5%) in renal transplant patients. This validated method could enable home-based therapeutic drug monitoring and kidney function testing, reducing the need for hospital visits.
Assessment of tacrolimus and creatinine concentration collected using Mitra microsampling devices — Marshall et al., Annals of clinical biochemistry (paywalled)
- blood
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- tdm
- immunosuppressants
2020
The authors developed and validated a VAMS method for quantifying immunosuppressants from venous whole blood using LC-MS/MS with a novel UniSpray ionisation probe. This supports patient-centric microsampling for transplant recipients requiring therapeutic drug monitoring.
Volumetric Absorptive Microsampling (VAMS) for assaying immunosuppressants from venous whole blood by LC-MS/MS using a novel atmospheric pressure ionization probe (UniSpray™) — Paniagua-González et al., Journal of pharmaceutical and biomedical analysis (paywalled)
- blood
- vams
- validation
- tdm
- immunosuppressants
2020
A targeted NGS panel using dried blood spots achieved 100% concordance with Sanger sequencing in detecting pathogenic variants across 32 samples, with average coverage of 596X. This validates microsampling for decentralised newborn screening programmes, enabling accurate genetic diagnosis from minimally invasive specimens.
A targeted gene capture next-generation sequencing panel for genetic screening of newborns — Peng et al., JPMA. The Journal of the Pakistan Medical Association (paywalled)
- blood
- dried
- dbs
- validation
- pediatric
- genotyping
2020
Urine samples produced lower cycle threshold values than urethral swabs for Chlamydia trachomatis and Neisseria gonorrhoeae positives, but the two methods yielded highly consistent results with only four discordant findings among 100 male outpatients. This validates clinician-collected swabs as an alternative to first-void urine on the cobas 4800 platform, which could aid decentralised diagnostics where urine collection is impractical.
Clinician-collected urethra swab: A good alternative sample type using cobas 4800 system for Chlamydia trachomatis and Neisseria gonorrhoeae in men — Wang et al., Journal of clinical laboratory analysis
- urine
- first-void
- validation
- sti
2020
In fifteen men consuming a controlled salt intake, second-void urine provided more reliable estimates of 24-hour urinary sodium excretion than first-void urine, with the sodium-to-potassium ratio in first-day second-void samples showing significant correlation with measured 24-hour output. This suggests spot second-void sampling could replace cumbersome 24-hour collections for sodium intake assessment in decentralised nutrition monitoring.
Development of objective indicators for quantitative analysis of sodium intake: the sodium to potassium ratio of second-void urine is correlated with 24-hour urinary sodium excretion — Kim et al., Nutrition research and practice
- urine
- first-void
- validation
2020
The study found only fair agreement between self-collected urine and vaginal samples for HPV DNA detection, with an overall agreement of 64.04% and a kappa value of 0.29. This suggests that urine self-sampling may not be a reliable substitute for vaginal self-sampling in this high-prevalence population for HPV screening.
Comparison of two self-sampling methods for human papillomavirus (HPV) DNA testing among women with high prevalence rates — Kuriakose et al., Journal of medical virology (paywalled)
- urine
- self-collection
- validation
- hpv
- sti
2020
Saliva shows potential as a patient-friendly alternative to nasopharyngeal swabs for COVID-19 diagnosis, with comparable sensitivity and specificity in RT-PCR testing. Its self-collection capability supports decentralised, patient-centric testing strategies during pandemics.
Saliva as a Biological Sample for COVID-19 Diagnosis? — Kafle & Sapkota, Kathmandu University medical journal (paywalled)
- saliva
- self-collection
- validation
- acceptability
- serology
2020
Dried blood spots yield accurate HBV-DNA quantification comparable to plasma, with a limit of quantification of 400 IU/mL. The DNA remains stable in dried spots at room temperature for one month, offering a practical solution for remote hepatitis B monitoring in resource-limited settings to guide treatment and prevent mother-to-child transmission.
Combined use of dried blood spot and rapid molecular systems: A robust solution to monitor hepatitis B virus infection with potential for resource-limited countries — Bargain et al., Journal of virological methods (paywalled)
- blood
- dried
- dbs
- validation
- venous-agreement
- serology
2020
The study validated dried blood spot cards for detecting rabies virus antibodies in 99 human pre- and post-vaccination samples, finding strong correlation between DBS and serum with the gold-standard FAVNt (R = 0.88) and acceptable sensitivity and specificity with both FAVNt and Platelia-II ELISA, supporting their use for rabies serology in remote areas where venipuncture is impractical.
Dried blood spot cards: A reliable sampling method to detect human antibodies against rabies virus — Doornekamp et al., PLoS neglected tropical diseases
- blood
- dried
- dbs
- validation
- venous-agreement
- serology
2020
The study developed and validated an LC-MS/MS method to measure selumetinib in whole blood collected via VAMS, showing the approach is reliable and stable under various conditions. This supports decentralised therapeutic drug monitoring, particularly in paediatric populations where less invasive sampling is beneficial.
Novel LC-MS/MS method for the determination of selumetinib (AZD6244) in whole blood collected with volumetric absorptive microsampling — Voggu et al., Bioanalysis (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- pediatric
- tdm
2020
The authors developed and validated high-sensitivity LC-MS/MS methods for tranexamic acid quantification in human whole blood, using either liquid samples or dried samples on volumetric absorptive microsampling devices. The methods performed excellently across clinically relevant concentrations, showed stability for up to one month at +50°C, and were validated with clinical samples, supporting decentralised therapeutic drug monitoring of this antifibrinolytic.
Tranexamic acid quantification in human whole blood using liquid samples or volumetric absorptive microsampling devices — Lamy et al., Bioanalysis (paywalled)
- blood
- liquid
- dried
- vams
- neoteryx-mitra
- validation
- tdm
2020
A VAMS method for measuring gamma-hydroxybutyric acid in blood was fully validated, showing linearity from 0.5 to 200 μg/ml and a lower limit of quantitation of 0.5 μg/ml. The method compared well with conventional plasma analysis in a patient receiving GHB therapy, suggesting microsampling could support decentralised therapeutic drug monitoring for this compound.
Development and validation of volumetric absorptive microsampling coupled with UHPLC-MS/MS for the analysis of gamma-hydroxybutyric acid in human blood — Mohamed et al., Biomedical chromatography : BMC (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
2020
The hemaPEN device demonstrated acceptable volumetric accuracy and precision for collecting dried blood spots in vitro, with performance unaffected by user training, while observed haematocrit-dependent bias was attributed to the extraction process rather than the device itself.
<i>In vitro</i> testing of the hemaPEN microsampling device for the quantification of acetaminophen in human blood — Sen et al., Bioanalysis (paywalled)
- blood
- dried
- dbs
- volumetric
- validation
- haematocrit
2020
An LC-MS/MS assay for testosterone, androstenedione and 17-hydroxyprogesterone using Mitra microsampling devices achieved mean recoveries of 102%, 98% and 97% respectively, with limits of quantification of 1–4 nmol/L. This analytical validation demonstrates that volumetric absorptive microsampling can deliver reliable reproductive hormone measurements, supporting its use in decentralised diagnostics.
Quantification of testosterone, androstenedione and 17-hydroxyprogesterone in whole blood collected using Mitra microsampling devices — Marshall et al., Annals of clinical biochemistry (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- venous-agreement
- fertility
- hormones
2020
The cobas® Plasma Separation Card demonstrated high sensitivity and specificity for HIV viral load from both venous and capillary blood, with misclassification rates under 1% compared with 5.9% for dried blood spots. This enables accurate decentralised HIV monitoring in primary care without requiring plasma centrifugation or cold chain transport.
Accurate HIV viral load measurement in primary health care settings using the cobas® plasma separation card — Vubil et al., PloS one
- blood
- dried
- capillary
- dbs
- validation
- venous-agreement
- serology
2020
First-void urine HPV antibody concentrations were lower than serum but showed strong positive correlations across four HPV types. The VLP-based multiplex ELISA demonstrated moderate to good agreement with the GST-L1 assay, confirming that self-collected first-void urine offers a viable non-invasive alternative for assessing HPV vaccine responses in decentralised studies, though larger investigations are needed to establish routine feasibility.
Comparison of a VLP-based and GST-L1-based multiplex immunoassay to detect vaccine-induced HPV-specific antibodies in first-void urine — Pattyn et al., Journal of medical virology
- urine
- first-void
- validation
- serology
- hpv
2020
The study compared detection rates and concordance of HPV16/18 E6 oncoprotein in urine, self-collected vaginal, and cervical specimens, demonstrating the potential for patient-collected samples to support decentralised cervical cancer screening in low-resource settings.
Detection of HPV E6 oncoprotein from urine via a novel immunochromatographic assay — Oliveira et al., PloS one
- urine
- self-collection
- validation
- hpv
- sti
2020
Among 181 HIV-positive men who have sex with men, four nucleic acid amplification assays showed variable sensitivity for detecting chlamydia and gonorrhea from self-collected rectal and urine specimens, with the ProbeTec GCQ assay significantly less sensitive for rectal gonorrhea. Urine-only screening would have missed more than 80 per cent of infections, underscoring the need for extragenital self-sampling in decentralised sexually transmitted infection diagnostics for this population.
Performance of 4 Molecular Assays for Detection of Chlamydia and Gonorrhea in a Sample of Human Immunodeficiency Virus-Positive Men Who Have Sex With Men — Footman et al., Sexually transmitted diseases (paywalled)
- urine
- self-collection
- validation
- sti
2020
Capillary blood collected with Neoteryx Mitra VAMS microsampling devices can quantify IGF-1 by automated chemiluminescent immunoassay after aqueous extraction. The hormone is stable for at least one month at room temperature, and dried blood concentrations match serum after dilution correction, though capillary samples underestimate high serum values, supporting patient-centric, decentralised endocrine monitoring but requiring population-specific reference ranges.
Volumetric Absorptive Microsampling (VAMS) technology for IGF-1 quantification by automated chemiluminescent immunoassay in dried blood — Marchand et al., Growth hormone & IGF research : official journal of the Growth Hormone Research Society and the International IGF Research Society (paywalled)
- blood
- dried
- capillary
- vams
- neoteryx-mitra
- validation
- venous-agreement
- hormones
2020
The authors developed and validated a volumetric absorptive microsampling assay for vancomycin in whole blood that is suitable for paediatric therapeutic drug monitoring. Vancomycin remained stable in dried VAMS samples for at least 160 days at -78°C, enabling reliable quantification in clinical studies using minimal blood volumes.
A whole blood microsampling assay for vancomycin: development, validation and application for pediatric clinical study — Moorthy et al., Bioanalysis (paywalled)
- blood
- dried
- vams
- neoteryx-mitra
- validation
- pediatric
- tdm
- antimicrobials
2020
The study found reasonable agreement between finger-prick dried blood spot CRP measurements and venous reference assays in 100 rheumatoid arthritis patients, particularly at low to mid-range CRP values, and showed that weekly self-collected DBS CRP monitoring improved flare detection specificity to 72.7% compared with 54.5% for minimal sampling, supporting decentralised microsampling for remote arthritis management.
Assessment of a dried blood spot C-reactive protein method to identify disease flares in rheumatoid arthritis patients — D'Cruz et al., Scientific reports
- blood
- dried
- dbs
- self-collection
- validation
- venous-agreement
- rpm
- multimodal
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