UMEM Educational Pearls

Category: Critical Care

Title: Hemodynamic monitoring - arterial pressure monitoring

Keywords: non-invasive arterial monitoring, radial artery (PubMed Search)

Posted: 11/6/2007 by Mike Winters, MD (Updated: 12/7/2019)
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  • It is traditionally taught that in hypotensive patients the presence of a carotid pulse corresponds to a SBP of 60-70 mmHg, a femoral pulse with a SBP of 70-80 mmHg, and a radial pulse with an SBP of at least 80 mmHg
  • These physical exam estimates of BP have been shown to poorly correlate with the patient's actual BP
  • Similarly, non-invasive measurements of BP (automated cuff) in patients with hypotension may either overestimate or underestimate SBP by as much as 20 mmHg
  • Since physical exam estimates and non-invasive measurements are inaccurate in low-flow states, utilize invasive arterial monitoring
  • Radial and femoral artery sites have been found to produce results that are clinically interchangeable