Mechanisms of Precise Immune Cell Phenotyping and Prognostic Prediction in Severe Infection

The goal of this observational study is to learn how changes in immune cells are linked to outcomes in adults with severe infection who are treated in the intensive care unit (ICU). Severe infections, including sepsis, can affect how the immune system works and may lead to poor recovery or death. Researchers want to better understand these immune changes so that people at higher risk can be identified earlier. The main questions this study aims to answer are: Are certain immune cell patterns linked to survival or death within 28 days? Are these immune patterns linked to organ failure or longer stays in the ICU? Participants will be adults with severe infection who are admitted to the ICU as part of their routine medical care. This study does not change or add to their medical treatment. Participants will: Have small blood samples collected at several time points during their ICU stay Allow researchers to review their medical records, including test results and outcomes Researchers will analyze immune cells in the blood and relate these findings to clinical outcomes. The results may help improve future risk assessment and understanding of immune changes in people with severe infection.

NCT Number	NCT07332793
Lead Sponsor	Second Affiliated Hospital of Wenzhou Medical University
Conditions	Sepsis
Enrollment	200 participants
Start Date	2026-01-15
Primary Completion	2026-01-16 (estimated)
Study Completion	2028-01-15 (estimated)
Updated on ClinicalTrials.gov	2026-01-12