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Sonographically guided arterial blood sampling using a handheld Doppler device.

Michael Fung Ngan1

  • 1East Broadway Medical Center, 17-23 East Broadway, Suite 401, New York, NY 10002, USA.

Journal of Clinical Ultrasound : JCU
|April 12, 2002
PubMed
Summary

A handheld Doppler device effectively guides arterial blood sampling in patients with difficult venous access. This tool aids in locating arteries for blood collection when pulses are faint, improving procedural success rates.

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Area of Science:

  • Medical Devices
  • Diagnostic Ultrasound
  • Vascular Access

Background:

  • Arterial blood sampling is crucial for assessing gas exchange.
  • Difficult venous access and indistinct arterial pulses pose challenges for sampling.
  • Obesity and edema can further complicate arterial access.

Purpose of the Study:

  • To evaluate the efficacy of a handheld Doppler device for guiding arterial blood sampling.
  • To assess the utility of Doppler guidance in patients with challenging vascular access.
  • To determine if Doppler technology improves success rates for arterial blood draws.

Main Methods:

  • A commercially available handheld Doppler device (Versadopp 10) with a 10-MHz transducer was used.
  • The Doppler was employed to identify the point of maximum flow in the brachial artery.

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  • Arterial blood samples were obtained using ultrasound guidance, with a maximum of two needle passes.

    • Main Results:

    • Arterial blood samples were successfully obtained in 18 out of 20 patients within two passes.
    • Sampling was unsuccessful in two patients, but successful from the contralateral artery.
    • The Doppler device proved convenient and easy to use for locating target arteries.

    Conclusions:

    • Handheld Doppler devices are effective for sonographic guidance during arterial blood sampling.
    • This technology is particularly beneficial in obese or edematous patients with weak arterial pulses.
    • Doppler-guided arterial sampling offers a reliable alternative when venous access is challenging.