CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Blood pressure measurement. Man having his blood pressure measured by a hospital nurse. The instrument used is a sphygmomanometer. A cuff is inflated around the upper arm to stop blood flow in the main artery. The nurse detects blood flow with a stethoscope. The cuff is then slowly deflated: first to record systolic pressure of the pumping heart; then to record diastolic pressure of the relaxed heart between pumps. Blood pressure is expressed as a difference between these two measurements, in millimetres of mercury (mm Hg). Although blood pressure varies over the day, it is an important measure of bodily health.
Model release available. Property release not required.