1
|
Collier BB, Brandon WC, Chappell MR, Kovach PM, Grant RP. Maximizing Microsampling: Measurement of Comprehensive Metabolic and Lipid Panels Using a Novel Capillary Blood Collection Device. J Appl Lab Med 2023; 8:1115-1126. [PMID: 37748757 DOI: 10.1093/jalm/jfad066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/08/2023] [Indexed: 09/27/2023]
Abstract
BACKGROUND Demand continues to grow for patient-centric sampling solutions that enable collection of small volumes of blood outside of healthcare facilities. Various technologies have been developed to facilitate sample collection but gaps in knowledge remain, preventing these technologies from replacing standard venipuncture. METHODS A novel blood collection device, Touch Activated Phlebotomy (TAP) II® from YourBio Health, and standard fingerstick collection using a BD Microtainer® were utilized to collect capillary serum samples. Measurements of a comprehensive metabolic and lipid panels were measured on these samples and compared to results from venous serum samples that were collected in parallel. Hemolysis was used to assess sample quality. Sample volumes obtained from self-collected TAP II samples were also determined. RESULTS Correlation of capillary serum with respect to venous serum was demonstrated (R > 0.9) for professionally collected TAP II samples, self-collected TAP II samples, and professionally collected fingerstick samples for alkaline phosphatase, alanine aminotransferase, aspartate aminotransferase, blood urea nitrogen, cholesterol, high-density lipoprotein, total bilirubin, and triglycerides. Results for creatinine demonstrated acceptable correlation, however, a consistent negative bias was observed. Biases (with unacceptable correlations) were also observed for measurements of carbon dioxide and potassium. Correlative results for albumin were not consistently acceptable across the collection techniques utilized while the remaining analytes tested did not demonstrate acceptable correlations under any condition. Correlation results, however, would improve with a wider distribution of analyte concentrations. CONCLUSIONS Collections of small volumes of liquid blood continue to show potential as a patient-centric solution.
Collapse
Affiliation(s)
| | | | | | - Peyton M Kovach
- Center for Esoteric Testing, Labcorp, Burlington, NC, United States
| | - Russell P Grant
- Center for Esoteric Testing, Labcorp, Burlington, NC, United States
| |
Collapse
|
2
|
Miesse PK, Collier BB, Grant RP. Monitoring of SARS-CoV-2 antibodies using dried blood spot for at-home collection. Sci Rep 2022; 12:5812. [PMID: 35388074 PMCID: PMC8985748 DOI: 10.1038/s41598-022-09699-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/28/2022] [Indexed: 11/10/2022] Open
Abstract
The utilization of vaccines to fight the spread of SARS-CoV-2 has led to a growing need for expansive serological testing. To address this, an EUA approved immunoassay for detection of antibodies to SARS-CoV-2 in venous serum samples was investigated for use with dried blood spot (DBS) samples. Results from self-collected DBS samples demonstrated a 98.1% categorical agreement to venous serum with a correlation (R) of 0.9600 while professionally collected DBS samples demonstrated a categorical agreement of 100.0% with a correlation of 0.9888 to venous serum. Additional studies were performed to stress different aspects of at-home DBS collection, including shipping stability, effects of interferences, and other sample-specific robustness studies. These studies demonstrated a categorical agreement of at least 95.0% and a mean bias less than ± 20.0%. Furthermore, the ability to track antibody levels following vaccination with the BioNTech/Pfizer vaccine was demonstrated with serial self-collected DBS samples from pre-dose (Day 0) out to 19 weeks.
Collapse
Affiliation(s)
- Peyton K Miesse
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC, USA
| | - Bradley B Collier
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC, USA.
| | - Russell P Grant
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC, USA
| |
Collapse
|
3
|
Crawford ML, Collier BB, Bradley MN, Holland PL, Shuford CM, Grant RP. Empiricism in Microsampling: Utilizing a Novel Lateral Flow Device and Intrinsic Normalization to Provide Accurate and Precise Clinical Analysis from a Finger Stick. Clin Chem 2020; 66:821-831. [DOI: 10.1093/clinchem/hvaa082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Phlebotomy plays a key role in clinical laboratory medicine but poses certain challenges for the patient and the laboratory. Dried blood spots simplify collection and stabilize specimens effectively, but clinical reference intervals are based primarily on serum or plasma. We evaluated use of dried separated blood plasma specimens to simplify plasma sample collection via finger stick; however, this sampling technique posed substantial analytical challenges. We discuss herein our efforts to overcome these challenges and provide accurate and precise clinical measurements.
Methods
Microsamples of whole blood were collected via finger stick using a collection device employing laminar-flow separation of cellular blood and plasma fractions with subsequent desiccation. Samples were analyzed on modern autoanalyzers with FDA-approved reagent and calibration systems, as well as commercially available reagents with laboratory-developed assay parameters. Measured analyte concentrations from extracted dried plasma samples were normalized to a coextracted endogenous analyte, chloride.
Results
Chloride normalization reduced variability incurred through extraction and undefined plasma volume. Excellent correlation of normalized measurements from dried finger-stick samples (whole blood and plasma) versus matched venous samples facilitated developing mathematical transformations to provide concordance between specimen types. Independent end-to-end performance verification yielded mean biases <3% for the 5 analytes evaluated relative to venous drawn samples analyzed on FDA-approved measurement systems.
Conclusion
Challenges inherent with this microsampling technique and alternate sample matrix were obviated through capabilities of modern autoanalyzers and implementation of chloride normalization. These results demonstrate that self-collected microsamples from a finger stick can give results concordant with those of venous samples.
Collapse
Affiliation(s)
- Matthew L Crawford
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| | - Bradley B Collier
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| | - Meghan N Bradley
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| | - Patricia L Holland
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| | - Christopher M Shuford
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| | - Russell P Grant
- Center for Esoteric Testing, Laboratory Corporation of America Holdings, Burlington, NC
| |
Collapse
|
4
|
Kozbial A, Bhandary L, Collier BB, Eickhoff CS, Hoft DF, Murthy SK. Automated generation of immature dendritic cells in a single-use system. J Immunol Methods 2018; 457:53-65. [PMID: 29625078 DOI: 10.1016/j.jim.2018.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 12/15/2022]
Abstract
Dendritic cells (DCs) are an indispensable part of studying human responses that are important for protective immunity against cancer and infectious diseases as well as prevention of autoimmunity and transplant rejection. These cells are also key elements of personalized vaccines for cancer and infectious diseases. Despite the vital role of DCs in both clinical and basic research contexts, methods for obtaining these cells from individuals remains a comparatively under-developed and inefficient process. DCs are present in very low concentrations (<1%) in blood, thus they must be generated from monocytes and the current methodology in DC generation involves a laborious process of static culture and stimulation with cytokines contained in culture medium. Herein, we describe an automated fluidic system, MicroDEN, that allows for differentiation of monocytes into immature-DCs (iDCs) utilizing continuous perfusion of differentiation media. Manual steps associated with current ex vivo monocyte differentiation are vastly reduced and an aseptic environment is ensured by the use of an enclosed cartridge and tubing network. Benchmark phenotyping was performed on the generated iDCs along with allogeneic T-cell proliferation and syngeneic antigen-specific functional assays. MicroDEN generated iDCs were phenotypically and functionally similar to well plate generated iDCs, thereby demonstrating the feasibility of utilizing MicroDEN in the broad range of applications requiring DCs.
Collapse
Affiliation(s)
- Andrew Kozbial
- Northeastern University, Department of Chemical Engineering, Boston, MA 02115, United States
| | - Lekhana Bhandary
- Northeastern University, Department of Chemical Engineering, Boston, MA 02115, United States
| | - Bradley B Collier
- Northeastern University, Department of Chemical Engineering, Boston, MA 02115, United States
| | - Christopher S Eickhoff
- Saint Louis University, School of Medicine, Department of Internal Medicine, St. Louis, MO 63104, United States
| | - Daniel F Hoft
- Saint Louis University, School of Medicine, Department of Internal Medicine, St. Louis, MO 63104, United States; Saint Louis University, School of Medicine, Department of Molecular Microbiology & Immunology, St. Louis, MO 63104, United States
| | - Shashi K Murthy
- Northeastern University, Department of Chemical Engineering, Boston, MA 02115, United States.
| |
Collapse
|
5
|
Abstract
Due to the increasing prevalence of diabetes, research toward painless glucose sensing continues. Oxygen sensitive phosphors with glucose oxidase (GOx) can be used to determine glucose levels indirectly by monitoring oxygen consumption. This is an attractive combination because of its speed and specificity. Packaging these molecules together in "smart materials" for implantation will enable non-invasive glucose monitoring. As glucose levels increase, oxygen levels decrease; consequently, the luminescence intensity and lifetime of the phosphor increase. Although the response of the sensor is dependent on glucose concentration, the ambient oxygen concentration also plays a key role. This could lead to inaccurate glucose readings and increase the risk of hyper- or hypoglycemia. To mitigate this risk, the dependence of hydrogel glucose sensor response on oxygen levels was investigated and compensation methods explored. Sensors were calibrated at different oxygen concentrations using a single generic logistic equation, such that trends in oxygen-dependence were determined as varying parameters in the equation. Each parameter was found to be a function of oxygen concentration, such that the correct glucose calibration equation can be calculated if the oxygen level is known. Accuracy of compensation will be determined by developing an overall calibration, using both glucose and oxygen sensors in parallel, correcting for oxygen fluctuations in real time by intentionally varying oxygen, and calculating the error in actual and predicted glucose levels. While this method was developed for compensation of enzymatic glucose sensors, in principle it can also be implemented with other kinds of sensors utilizing oxidases.
Collapse
Affiliation(s)
- Bradley B Collier
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843
| | - Michael J McShane
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843 ; Department of Materials Science and Engineering Program, Texas A&M University, College Station, TX 77843
| |
Collapse
|
6
|
Abstract
With advances to chemical sensing, methods for compensation of errors introduced by interfering analytes are needed. In this work, a dual lifetime calculation technique was developed to enable simultaneous monitoring of two luminescence decays. Utilizing a windowed time-domain luminescence approach, the response of two luminophores is separated temporally. The ability of the dual dynamic rapid lifetime determination (DDRLD) approach to determine the response of two luminophores simultaneously was investigated through mathematical modeling and experimental testing. Modeling results indicated that lifetime predictions will be most accurate when the ratio of the lifetimes from each luminophore is at least three and the ratio of intensities is near unity. In vitro experiments were performed using a porphyrin that is sensitive to both oxygen and temperature, combined with a temperature-sensitive inorganic phosphor used for compensation of the porphyrin response. In static experiments, the dual measurements were found to be highly accurate when compared to single-luminophore measurements-statistically equivalent for the long lifetime emission and an average difference of 2% for the short lifetimes. Real-time testing with dynamic windowing was successful in demonstrating dual lifetime measurements and temperature compensation of the oxygen sensitive dye. When comparing the actual oxygen and temperature values with predictions made using a dual calibration approach, an overall difference of less than 1% was obtained. Thus, this method enables rapid, accurate extraction of multiple lifetimes without requiring computationally intense curve fitting, providing a significant advancement toward multi-analyte sensing and imaging techniques.
Collapse
Affiliation(s)
- Bradley B Collier
- Department of Biomedical Engineering at Texas A&M University and is currently working as a Postdoctoral Scholar at the University of California, Davis in Sacramento, CA ( )
| | - Michael J McShane
- Departments of Biomedical Engineering and Materials Science & Engineering at Texas A&M University in College Station, TX ( )
| |
Collapse
|
7
|
Collier BB, McShane MJ. Dynamic Windowing Algorithm for the Fast and Accurate Determination of Luminescence Lifetimes. Anal Chem 2012; 84:4725-31. [DOI: 10.1021/ac300023q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
|
9
|
|
10
|
Denman W, Collier BB. An inappropriate use of tape. Anaesthesia 1990; 45:794-5. [PMID: 2240561 DOI: 10.1111/j.1365-2044.1990.tb14482.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
11
|
|
12
|
Abstract
One-hundred-and-fifty-four selected patients aged 19--80 years with lumbar sciatic pain of 2-week-30-year duration, treated with percutaneous rhizolysis, epidural block and acupuncture are reviewed. One-hundred-and-eighteen (76.6%) patients were significantly relieved of their pain. One-hundred-and-twenty-two patients (79.2%) underwent rhizolysis. All 154 patients had been previously treated by an orthopaedic surgeon.
Collapse
|
13
|
|
14
|
|