[A thermal chamber for the cold test in vasomotor disorders]

Area of Science:

• Vascular physiology
• Medical instrumentation

Context:

• The cold test is vital for evaluating vascular system function in Raynaud's disease.
• Accurate cold testing requires a large skin surface area and simultaneous multi-parameter measurements across varying temperatures.
• Individual vascular reactivity to cold necessitates adaptable testing protocols.

Purpose:

• To present a novel thermal chamber designed for comprehensive vascular function assessment.
• To enable simultaneous plethysmography, digital pressure recordings, and capillaroscopy within controlled temperature ranges.
• To introduce a new application of a laser flowmeter for enhanced vascular analysis.

Summary:

• A specialized thermal chamber facilitates simultaneous physiological measurements, including plethysmography, digital pressure, and capillaroscopy, under diverse temperature conditions.
• Peri-ungual capillaroscopy within the chamber precisely identifies the temperature thresholds for capillary spasm onset and relief during cooling and rewarming.
• The apparatus integrates a laser flowmeter, offering a novel method for detailed vascular flow assessment.

Impact:

• Provides an adaptable platform for exploring vascular function, crucial for diagnosing and managing conditions like Raynaud's disease.
• Enhances the accuracy and comprehensiveness of cold stress testing by enabling simultaneous, multi-modal data acquisition.
• Facilitates a deeper understanding of individual vascular responses to thermal challenges, leading to improved patient care.