Mercury Sphygmomanometer

A Manual Mercury BP Machine is a Class II medical device consisting of a calibrated mercury column (0-300 mm Hg, 2 mm graduations), inflation bulb with precision valve, and various cuff sizes, providing the gold standard for non-invasive blood pressure measurement through auscultation of Korotkoff sounds. The mercury column requires no calibration, offers inherent accuracy (±3 mm Hg), and serves as the reference standard against which all other BP devices are validated. Primary clinical applications include hypertension diagnosis and management (all clinical guidelines based on mercury measurements), clinical research and device validation studies, teaching auscultatory technique, cardiovascular risk assessment, special population monitoring (atrial fibrillation), and periodic validation of aneroid/automated devices. Critical safety considerations include mercury toxicity (toxic if spilled, inhaled, or ingested), strict spill response protocols, prohibition of tilting or inverting the device, mandatory use of mercury spill kits, and compliance with Minamata Convention phase-out regulations. Due to environmental and health concerns, mercury devices are being phased out globally, but remain the historical and reference standard for blood pressure measurement.