Carotid blood flow response to Conray-60: diagnostic implications

Area of Science:

• Neurology
• Radiology
• Vascular Medicine

Background:

• Angiographic contrast media can influence cerebral circulation.
• Understanding these vasoactive effects is crucial for interpreting neuroangiographic findings.

Purpose of the Study:

• To investigate the vasoactive effects of Conray-60 (iothalamate meglumine 60%) on carotid blood flow.
• To determine if these effects can differentiate between normal subjects and patients with specific neurological conditions.

Main Methods:

• Utilized the video dilution technique to measure carotid blood flow.
• Administered 1 ml injections of Conray-60 into the carotid arteries in 26 subjects.
• Analyzed changes in blood flow at 30 seconds post-injection.

Main Results:

• Normal controls showed an increase in carotid blood flow.
• Patients with atheromatous disease and avascular intracranial masses exhibited a significant decrease in flow (p < 0.01).
• Differential responses were also observed in patients with intracranial aneurysm, neoplasm, and granulomatous vasculitis.

Conclusions:

• The vasoactive response to Conray-60 varies significantly with different central nervous system pathologies.
• This differential effect offers a potential diagnostic tool for evaluating cerebrovascular disorders.