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Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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Related Experiment Video

Updated: Dec 27, 2025

Induction of Diffuse Axonal Brain Injury in Rats Based on Rotational Acceleration
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Diagnostic Problems in Diffuse Axonal Injury.

Sung Ho Jang1

  • 1Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University 317-1, Daemyungdong, Namku, Taegu 705-717, Korea.

Diagnostics (Basel, Switzerland)
|February 27, 2020
PubMed
Summary
This summary is machine-generated.

Diagnosing diffuse axonal injury (DAI) is challenging due to limited evidence for the 6-hour loss of consciousness (LOC) criterion and low MRI sensitivity. Diffusion tensor imaging (DTI) shows promise for detecting DAI.

Keywords:
concussiondiagnosisdiffuse axonal injurydiffusion tensor imagingtraumatic brain injury

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Area of Science:

  • Neuroscience
  • Radiology
  • Trauma Surgery

Background:

  • Diagnosing diffuse axonal injury (DAI) in traumatic brain injury (TBI) patients presents significant challenges.
  • Current diagnostic methods rely on clinical factors and conventional MRI, which have limitations.

Purpose of the Study:

  • To review the diagnostic challenges of DAI, including the questionable validity of the 6-hour loss of consciousness (LOC) criterion.
  • To highlight the low sensitivity of conventional MRI and the inappropriateness of the term "diffuse" in DAI.
  • To explore the potential of diffusion tensor imaging (DTI) for improved DAI detection.

Main Methods:

  • Review of existing scientific literature and diagnostic criteria for DAI.
  • Comparison of conventional MRI sensitivity with emerging DTI capabilities.
  • Analysis of clinical manifestations and LOC duration in relation to DAI diagnosis.

Main Results:

  • The 6-hour LOC criterion lacks robust scientific evidence for differentiating concussion from DAI, as axonal injuries occur with shorter LOC durations.
  • Conventional MRI has low sensitivity, detecting DAI lesions in only about half of affected patients.
  • DAI lesions are multifocal, not diffuse, and axonal injuries are also found in concussion patients.

Conclusions:

  • There is a need for standardized terminology and revised diagnostic criteria for DAI and concussion.
  • Diffusion tensor imaging (DTI) demonstrates high sensitivity for DAI detection and requires further research to establish diagnostic criteria.
  • Rethinking the term "diffuse" in DAI is necessary due to the multifocal nature of the injury.