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

Lukas Grassegger1,2, Nikolaus Hofmann3, Johannes Zipperle4

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Summary

Trauma-induced coagulopathy involves early platelet dysfunction within 24 hours, independent of platelet count. This qualitative dysfunction, not sustained over a week, showed no consistent link to specific injury patterns like traumatic brain injury.

Keywords:
TBImultiplatemultiple traumatrauma‐induced coagulopathytrauma‐induced platelet dysfunction

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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.