Magnetic inductive phase shift: a new method to differentiate hemorrhagic stroke from ischemic stroke on rabbit

Area of Science:

• Biomedical Engineering
• Neuroscience
• Medical Diagnostics

Background:

• Thrombolytic therapy is standard for ischemic stroke but dangerous for hemorrhagic stroke.
• Current imaging methods (CT, MRI) are unsuitable for pre-hospital stroke differentiation.
• Accurate, rapid stroke diagnosis is critical for effective treatment and patient outcomes.

Purpose of the Study:

• To develop a novel, non-invasive device for differentiating between ischemic and hemorrhagic stroke.
• To assess the feasibility of using electromagnetic induction for real-time stroke diagnosis.
• To establish a simple and cost-effective method for pre-hospital stroke assessment.

Main Methods:

• A brain diagnostic device utilizing electromagnetic induction was developed for rabbits.
• The device measures magnetic inductive phase shift (MIPS) using two coils and a phase difference system.
• Stroke models were created via autologous blood injection (hemorrhage) and carotid artery occlusion (ischemia).

Main Results:

• MIPS values showed distinct and opposite trends for hemorrhagic versus ischemic stroke.
• MIPS decreased with increasing hemorrhage volume and increased with ischemia duration.
• MIPS variations were significantly greater in stroke models compared to controls (P < 0.05).

Conclusions:

• The developed device successfully differentiates between ischemic and hemorrhagic stroke in a rabbit model.
• The technique is non-invasive, allows continuous monitoring, and uses simple, inexpensive apparatus.
• This method holds potential for pre-hospital stroke diagnosis and management.