Development and validation of a simple and rapid way to generate low volume of plasma to be used in point-of-care HIV virus load technologies
Braz. j. infect. dis
;
24(1): 30-33, Feb. 2020. graf
Article
in English
| LILACS
| ID: biblio-1089321
ABSTRACT
ABSTRACT A new point-of-care HIV viral load, mPIMA HIV-1/2 VL, Abbott, USA, has been recently developed. This point-of-care viral load requires no skilled person to run and uses a small plasma volume (50 µL). However, obtaining 50 µL of plasma can be a challenge in limited resource settings. We validated a simple and easy method to obtain enough amount of plasma to run a point-of-care viral load. The study utilized 149 specimens from patients failing antiretroviral therapy. At least 250 µL of whole blood was collected in a microtube/EDTA from fingerstick (fs-plasma) and immediately centrifuged. Parallel collection of venous blood to obtain plasma (vp-plasma) was used to compare performance in a point-of-care viral load assay and in methodology used in centralized laboratories Abbott M2000, Abbott, USA. The procedure for plasma collection takes less than 10 min and in 94% of the cases only one fingerstick was sufficient to collect at least 250 µL of blood. The Pearson correlation coefficient value for vp-plasma versus fs-plasma ran on mPIMA was 0.990. The Bland-Altman mean difference (md) for this comparison were virtually zero (md = −0.001) with limits of agreement between −0.225 and 0.223. In addition, the Pearson correlation coefficient value for fs-plasma in mPIMA versus vp-plasma in Abbott M2000 was 0.948 for values above the mPIMA limit of quantification (LoQ; from 800 to 1,000,000 copies/mL). These results validate this simple plasma isolation method capable to be implemented in low resource countries where point-of-care decentralization is deeply needed.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Plasma
/
HIV
/
Point-of-Care Systems
/
Viral Load
Type of study:
Prognostic study
Limits:
Humans
Language:
English
Journal:
Braz. j. infect. dis
Journal subject:
Communicable Diseases
Year:
2020
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal do Rio de Janeiro/BR
/
Universidade Federal do estado do Rio de Janeiro/BR
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