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How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters
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Temperature course and distribution during plasma heating with a microwave device.

J Hirsch1, R Bach, A Menzebach

  • 1Department of Anaesthesiology and Intensive Care Medicine, University Hospital, Giessen, Rudolf Buchheim Str. 7, 35385 Giessen, Germany. Jan.Hirsch@chiru.med.uni-giessen.de

Anaesthesia
|April 16, 2003
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Summary

Microwave blood warmers, like the Transfusio-therm 2000(R), can safely heat fresh frozen plasma (FFP). This study found no general or localized overheating during FFP warming, addressing key safety concerns.

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Area of Science:

  • Transfusion Medicine
  • Biomedical Engineering

Background:

  • Concerns regarding localized or general overheating have limited the adoption of microwave devices for warming fresh frozen plasma (FFP).
  • Shorter thawing times offered by microwave technology present a potential advantage for rapid FFP preparation.

Purpose of the Study:

  • To evaluate the safety and efficacy of the Transfusio-therm 2000(R) microwave blood warmer for heating FFP.
  • To assess the risk of overheating during and after the microwave warming process.

Main Methods:

  • Fresh frozen plasma units were heated using the Transfusio-therm 2000(R), with simultaneous or individual unit warming.
  • Surface and internal plasma temperatures were monitored using multiple sensors and a calibrated thermometer.
  • Heating times and temperature variations were recorded and analyzed.

Main Results:

  • No instances of general or localized overheating were observed during the warming process.
  • When heating three units simultaneously, the mean plasma temperature reached 33.6°C (SD, 0.8°C) after 23.2 minutes.
  • When heating a single unit, the mean plasma temperature reached 33.1°C (SD, 0.6°C) after 6.3 minutes.

Conclusions:

  • The Transfusio-therm 2000(R) microwave blood warmer effectively heats fresh frozen plasma without causing detrimental overheating.
  • This technology offers a safe and efficient method for FFP warming in clinical settings.