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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
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Related Experiment Video

Updated: Jan 17, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

1.6K

Platelet function testing does not predict hemorrhage progression in mild traumatic brain injury.

Tessa A Harland1, Andrew Ku2, Gregory Topp1

  • 1Department of Neurosurgery, Albany Medical College, Albany NY, United States.

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
|September 24, 2025
PubMed
Summary
This summary is machine-generated.

Platelet function testing in patients with mild traumatic brain injury did not show increased risk of worsening. These findings suggest current guidelines may need reevaluation for antiplatelet therapy management.

Keywords:
Adult brain injuryAntiplatelet therapyBrain injury guidelinesHead traumaRadiographic progressionTraumatic brain injury

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Area of Science:

  • Neurotrauma
  • Hematology
  • Clinical Medicine

Background:

  • Antiplatelet medications are often presumed to worsen traumatic intracranial hemorrhage (ICH) outcomes.
  • Current guidelines recommend extended observation and imaging, influenced by this assumption.
  • However, the actual impact of antiplatelet therapy on platelet function and clinical outcomes in ICH is not fully understood.

Purpose of the Study:

  • To investigate the association between therapeutic platelet inhibition and radiographic or clinical progression in patients with traumatic ICH.
  • To evaluate the utility of platelet function testing in managing patients on antiplatelet therapy after mild traumatic ICH.

Main Methods:

  • Retrospective cohort study of adult patients with mild traumatic ICH (GCS 13-15) on antiplatelet therapy.
  • Platelet function testing (VerifyNow PRU or PFA) classified patients as therapeutic or non-therapeutic.
  • Comparison of radiographic progression, surgical intervention, and mortality between groups, with sensitivity analyses.

Main Results:

  • No significant difference in radiographic progression between therapeutic (20.4%) and non-therapeutic (16.8%) groups.
  • Surgical intervention and mortality rates were low and comparable between groups.
  • Sensitivity analyses confirmed the lack of association between therapeutic inhibition and adverse outcomes.

Conclusions:

  • Therapeutic platelet inhibition is not linked to increased radiographic or clinical worsening in mild traumatic ICH.
  • Findings challenge the assumption of antiplatelet medication risk in this patient population.
  • Reevaluation of current guidelines and risk stratification strategies is warranted, potentially utilizing prospective studies.