Published April 11, 2026 | Version v3

Intraoperative CO2 Absorbent Replacement: Mechanisms and Risk of Hypoventilation

Authors/Creators

  • 1. Department of Anesthesiology, Saiseikai Matsusaka General Hospital, Japan

Description

This slide set explains the risk of hypoventilation during intraoperative replacement of CO2 absorbent canisters. It focuses on the underlying mechanisms and device-specific behavior of anesthesia machines, based on reported cases and APSF Newsletter (2024).

The material highlights that mechanical ventilation may appear normal despite a significant leak, while manual ventilation fails due to reservoir bag collapse. Differences among piston, turbine, bellows, and volume reflector systems are illustrated.

This educational resource aims to improve understanding of anesthesia machine behavior and enhance patient safety.

本スライドは、手術中のソーダライムカニスタ交換に伴う換気不全のリスクについて解説した教育資料である。症例報告及びAPSF Newsletter (2024年)をもとに、麻酔器の構造と機種ごとの挙動の違いに着目し、リーク発生時のメカニズムを図解で説明している。ピストン式およびタービン式ベンチレーターにおいては、機械換気が成立していても手動換気が不能になることや、呼吸バッグの重要性について特に強調している。

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version 3.0 (2026)

  • Corrected the update year from 2025 to 2026.
  • Revised terminology to improve clarity and consistency.
  • Updated the figure of the volume reflector ventilator (Slide 34)
  • Revised the content of Slides 35, 40, and 42.

Files

CO2_Absorbent_Replacement_Hypoventilation_Risk_Kuruma_2025_v3.0_JP.pdf

Files (69.6 MB)