Effects of Storage on Lactate in Blood Samples

The purpose of this study is to determine whether laboratory storage of samples affects the amount of lactate over 3 years.

Lactate is a natural substance normally present in the body. Lactate levels can go up for many different reasons, including treatment with nucleotide reverse transcriptase inhibitor drugs. This study will help researchers know if stored blood samples can be used to test lactate levels.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

HIV Infections Blood-Borne Infections Communicable Diseases Genital Diseases Immune System Diseases Immunologic Deficiency Syndromes Infections Lentivirus Infections RNA Virus Infections Retroviridae Infections Sexually Transmitted Diseases Sexually Transmitted Diseases, Viral Urogenital Diseases Virus Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

UCSF - San Francisco Gen Hosp, San Francisco, California, United States

About this study

Lactic acidosis syndrome is a complication of therapy with nucleoside reverse transcriptase inhibitor (NRTI) drugs. Measurement of lactate levels is important in clinical trials of antiretroviral treatments. The preferred collection method for determining plasma lactate is with NaF/KOx tubes, while a number of ACTG studies have stored blood in ethylenediaminetetraacetic acid (EDTA) tubes. This study will analyze lactate in samples collected and stored in NaF/KOx and EDTA tubes to investigate the reliability of lactate concentrations over time.

Pre- and post-exercise blood samples are drawn from participants into NaF/KOx and EDTA tubes and a portion is tested for lactate levels immediately. The remaining portions are frozen and tested at 1, 3, 6, 12, 18, 24, and 36 months.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Participants may be eligible for this study if they:

Are at least 18 years old.
Have sufficient forearm veins.

Exclusion criteria

Participants will not be eligible for this study if they:

Have a physical disability that prevents forearm exercise.
Have any known medical reason, such as anemia, for not having 82 ml of blood drawn.

Sponsors and collaborators

Lead sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Nih

Registry information

Official study title

Effects of Storage on Plasma Lactate Determinations

Important dates

Study start: 2001
First posted: Aug 31, 2001
Registry last updated: Jul 30, 2008

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed