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[Laser Doppler blood flowmetry].

K Kvernebo1, O C Lunde

  • 1Kirurgisk Storavdeling, Rikshospitalet, Oslo.

Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
|October 10, 1991
PubMed
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Laser Doppler Flowmetry (LDF) continuously quantifies microvascular blood flow using laser light. This method analyzes Doppler shifts to measure red blood cell flux in tissues, with diverse clinical applications.

Area of Science:

  • Biomedical Engineering
  • Medical Physics

Context:

  • Microvascular perfusion assessment is crucial for diagnosing and monitoring various medical conditions.
  • Existing methods for measuring tissue blood flow have limitations in terms of invasiveness or continuous monitoring capabilities.

Purpose:

  • To provide a comprehensive review of Laser Doppler Flowmetry (LDF) technology.
  • To explain the underlying theory, methodological considerations, and clinical utility of LDF for microvascular perfusion measurements.

Summary:

  • Laser Doppler Flowmetry (LDF) utilizes low-energy Helium-Neon laser light to continuously measure microvascular perfusion.
  • The technique analyzes Doppler-shifted light reflected from moving blood cells, with the signal output proportional to red blood cell flux.
  • LDF is applicable to skin, surgically exposed surfaces, endoscopic measurements, and minimally invasive tissue probes (0.5 mm diameter).

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Impact:

  • Facilitates non-invasive and continuous monitoring of tissue perfusion.
  • Offers a valuable tool for clinical research and diagnostics across various specialties.
  • Enables precise quantification of microvascular dynamics in small tissue volumes.