Journal of Clinical Monitoring

, Volume 6, Issue 4, pp 261–265 | Cite as

Auscultatory mean blood pressure

  • G. J. Davis
  • L. A. Geddes
Original Articles


This study examined the relationship between direct mean arterial blood pressure and cuff pressure for the maximum acoustic index calculated from the Korotkoff sounds in the dog. The acoustic index was computed by summing the squares of amplitudes in each Korotkoff sound complex, thereby providing a measure of acoustic energy content. Mean arterial pressure was compared with cuff pressure for the maximum acoustic index. Ten mongrel dogs were fitted with appropriately sized blood-pressure cuffs containing a microphone mounted inside the bladder and positioned over the brachial artery. The Korotkoff sounds, cuff pressure, and direct arterial pressure were recorded over a range of mean arterial pressures (23 to 155 mm Hg), achieved by manipulating the depth of anesthesia with halothane. It was found that cuff pressure at the maximum acoustic index overestimated mean arterial blood pressure by a mean of 14% (range, -8 to + 30%).

Key Words

Measurement techniques: blood pressure Monitoring: blood pressure 


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Copyright information

© Little, Brown and Company 1990

Authors and Affiliations

  • G. J. Davis
    • 1
  • L. A. Geddes
    • 2
  1. 1.School of Electrical EngineeringPurdue UniversityWest Lafayette
  2. 2.Hillenbrand Biomedical Engineering CenterPurdue UniversityWest Lafayette

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