The measurement of fluid pressures in the body has numerous medical applications. Blood, bladder, cerebrospinal and air pressures are some of the areas of interest to clinicians and researchers.
Blood pressure measurement is one of the most routinely performed tests in medicine. This is usually done using the auscultatary method, an indirect non-invasive method of measuring blood pressure. A cuff is placed over the brachial artery and inflated past the systolic (maximum) pressure which cuts off the blood flow. The cuff is then deflated gradually. At the systolic pressure of the blood the turbulent flow of the blood generates a Korotkoff sound. This sound continues until the cuff pressure falls below the diastolic (minimum) blood pressure. The intensity of the Korotkoff sound is monitored through a stethoscope placed over the artery under the cuff.
Commercially available automatic blood pressure monitors use sound transducers to monitor the Korotkoff sounds and a pressure transducer to measure the cuff pressure.
For the following areas of interest, please click below:
Pressure Transducer Design
Conductive Elastomer Pressure Transducers
Pressure Sensitive Polyester Film
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Support for the development of this module was provided by the National Science Foundation and The Cooper Union for the Advancement of Science and Art.
Please send questions or comments to Professor Ron Adrezin or Professor Daniel Raichel.