Platelet function in major trauma: A 5-day trajectory analysis by injury pattern.

Area of Science:

• Trauma and hemorrhagic shock research
• Hematology and coagulation disorders
• Platelet function and aggregometry

Background:

• Platelet dysfunction is a key factor in trauma-induced coagulopathy.
• The progression of platelet dysfunction and its relation to injury types require further investigation.

Purpose of the Study:

• To investigate the trajectory of platelet function after severe trauma.
• To determine the relationship between platelet dysfunction and specific injury patterns, including traumatic brain injury (TBI).

Main Methods:

• Retrospective analysis of severely injured patients undergoing Multiplate™ impedance aggregometry.
• Stratification of patients into isolated TBI, major trauma without TBI (MT), and major trauma with TBI (TBI+MT) groups.
• Platelet counts were normalized to mitigate their influence on function testing.

Main Results:

• Platelet function (ASPI, ADP, TRAP) was significantly reduced within 24 hours post-trauma.
• After adjusting for platelet count, only ASPI and ADP remained reduced on day 1.
• Injury patterns, including TBI, did not show a consistent association with sustained platelet dysfunction.

Conclusions:

• Severe trauma causes early, qualitative platelet dysfunction within 24 hours, separate from thrombocytopenia.
• Platelet function stabilized in survivors during the one-week observation period.
• No consistent link was found between injury patterns and persistent platelet dysfunction.