1. Instruments that measure changes in the volume of a body part or organ, typically used to assess blood flow or air volume in medical and physiological research.
Usage: Medical/scientific term; Plural form of plethysmograph; Commonly used in cardiology, pulmonology, and sleep medicine

Examples

• The laboratory uses several plethysmographs to monitor blood circulation in patients with vascular disorders.
• Researchers employed plethysmographs to measure changes in penile volume during the sleep study.
• Modern plethysmographs can detect subtle variations in limb volume with high precision.
• The clinic purchased new plethysmographs to improve their diagnostic capabilities for peripheral vascular disease.
• Plethysmographs are essential tools in sleep medicine for detecting sleep apnea events.