How long is a stool sample valid after collection?
Oct 08, 2022
Source: Cainiu Health
Dr. Zhao Haiming
Introduction
In general, the fresher the stool sample, the higher the accuracy of the test. The stool collection should be completed within 30 to 60 minutes, and must not exceed 2 hours at most. If left too long, the stool sample may have its cellular components degraded due to changes in digestive enzymes or pH levels, or may become contaminated by other viruses, bacteria, etc., which could affect the accuracy of the test results.
Fecal sample collection should generally be completed within 30 to 60 minutes, and must not exceed two hours at most, to prevent potential impacts on test results.
Fecal sample collection is typically required for routine stool examinations. This type of test helps doctors assess pathological conditions of the patient's gastrointestinal tract and indirectly evaluate the functional status of digestive system organs such as the liver, intestines, and stomach. For routine stool tests, the fresher the sample, the more accurate the results. Therefore, the time between defecation and sample submission should usually be limited to 30–60 minutes, and must not exceed two hours. If the sample is left too long, its components may be degraded due to changes in digestive enzymes or pH levels. Prolonged exposure to the external environment may also lead to contamination by other viruses, bacteria, or microorganisms, compromising the accuracy of the test results.
In addition, during fecal sample collection, care should be taken to avoid mixing urine with the stool to prevent sample contamination.
