Laser Doppler flowmetry to measure changes in cerebral blood flow

Area of Science:

• Neuroscience
• Physiology
• Biomedical Engineering

Background:

• Laser Doppler flowmetry (LDF) is a widely used technique for assessing relative cerebral blood flow (CBF).
• While LDF offers ease of use, it is limited to quantifying relative, not absolute, CBF.
• Understanding CBF dynamics is crucial in neurovascular and stroke research.

Purpose of the Study:

• To provide a comprehensive guide for conducting rodent experiments using Laser Doppler flowmetry (LDF).
• To detail two distinct preparations: closed skull and open skull techniques for monitoring cortical CBF.
• To ensure accurate measurement of cerebral perfusion in experimental models.

Main Methods:

• The chapter describes the closed skull preparation, noting the necessity of skull thinning in adult rats for precise cortical CBF signals.
• It also details the open skull preparation, involving a craniotomy to directly expose the brain surface for LDF probe placement.
• Both methods aim to optimize the acquisition of reliable relative CBF data.

Main Results:

• The described methods enable the monitoring of relative cerebral blood flow (CBF) in rodent models.
• The closed skull preparation requires specific adaptations (skull thinning) for accurate measurements in adult rats.
• The open skull preparation allows for direct surface measurement of cerebral perfusion.

Conclusions:

• Laser Doppler flowmetry (LDF) is a valuable tool for relative CBF assessment in rodent research.
• Proper preparation techniques, including skull thinning or craniotomy, are essential for obtaining accurate cortical CBF data.
• This guide equips researchers with the necessary knowledge for successful LDF application in neurovascular and stroke studies.