Canis ISSN: 2398-2942

Blood pressure: Doppler ultrasound

Contributor(s): John Dodam

Introduction

Uses

  • Doppler ultrasound can be used as a method for non-invasive measurement of arterial blood pressure.

Technical details

  • A thin flat transducer containing two crystals is placed on the skin over an artery.
  • Ultrasound signals emitted by one crystal are reflected back to the second crystal by the moving artery wall.
  • Incident and reflected ultrasound signals are at different frequencies. This is converted to an audible pulsing sound ('whooshing' noise with each pulse).

Technique

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Advantages and disadvantages

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Further Reading

Publications

Refereed papers

  • Recent references from VetMedResource and PubMed.
  • Meurs K M, Miller M W et al (2000) Arterial blood pressure measurement in a population of healthy geriatric dogs. JAAHA 36, 497-500.
  • Bodey A R & Rampling M W (1999 )Comparison of hemorrheological parameters and blood pressure in various breeds of dog. JSAP 40(1), 3.

Other sources of information

  • Trim C M (1994) Monitoring the anesthetized cat. In: Anesthesia of the Cat. Eds L W Hall & P M Taylor. London: Bailliere Tindall. (Chapter written in feline anesthesia text but offers excellent description of monitoring applicable to all species.)


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