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A method for continuous blood sampling during cold water immersion

S M Martin1, L G Bauce, T J Malkinson

  • 1Biology Department, Mt. St. Vincent University, Halifax, NS, Canada.

Life Sciences
|January 1, 1993
PubMed
Summary
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A new continuous blood sampling technique using a catheter-peristaltic pump was successfully tested on volunteers during cold water immersion. This method provides sufficient blood volume for analysis with minimal subject discomfort.

Area of Science:

  • Physiology
  • Medical Devices

Background:

  • Continuous blood sampling is crucial for monitoring physiological responses.
  • Existing methods may cause discomfort or yield insufficient sample volumes.

Purpose of the Study:

  • To evaluate a novel continuous blood sampling technique.
  • To assess the feasibility of collecting blood samples during cold water immersion.

Main Methods:

  • A pre-calibrated catheter-peristaltic pump system was employed.
  • Six volunteers underwent a 20-minute immersion in cold water (14.7 ± 0.9°C).
  • Blood samples were continuously collected from an antecubital vein.

Main Results:

  • The technique allowed for continuous blood collection throughout the experiment.

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  • Minimal discomfort was reported by the subjects.
  • Sufficient blood volumes were obtained for plasma constituent analysis, including catecholamines.

    • Conclusions:

    • The catheter-peristaltic pump system is an effective method for continuous blood sampling.
    • This technique is well-tolerated by subjects during cold exposure.
    • It facilitates the analysis of crucial plasma biomarkers like catecholamines in physiological studies.