Horizontal flow chambers have a shorter residence time in the chamber than vertical flow chambers

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  • Shimizu Kota
    Department of Clinical Engineering, Fujita Health University Hospital
  • Kuriyama Naohide
    Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine
  • Moriyama Kazuhiro
    Laboratory for Immune Response and Regulatory Medicine, Fujita Health University School of Medicine
  • Kato Masao
    Department of Clinical Engineering, Fujita Health University Hospital
  • Nakamura Tomoyuki
    Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine
  • Hara Yoshitaka
    Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine
  • Komura Hidefumi
    Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine
  • Inaguma Daijo
    Department of Nephrology, Fujita Health University Bantane Hospital
  • Nishida Osamu
    Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine

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Other Title
  • 水平流入方式チャンバーは垂直流入方式チャンバーよりも，チャンバー内における滞留時間が短い
  • スイヘイ リュウニュウ ホウシキ チャンバー ワ スイチョク リュウニュウ ホウシキ チャンバー ヨリ モ,チャンバー ナイ ニ オケル タイリュウ ジカン ガ ミジカイ

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<p>Introduction : The venous air trap (V) chamber used in blood purification systems is a possible source of coagulation during blood purification. In this study, the fluid residence time of differently shaped V-chambers was evaluated in simulated experiments. Methods : The Prismaflex and ACH-Σ consoles were evaluated. The time from the injection of 1 mL of dye into the V-chamber to its disappearance was measured three times each, and the average values were compared. Additionally, the flow of fluids in the V-chamber was evaluated visually. Results: The fluid residence time in the V-chamber was significantly shorter in the Prismaflex group (p＜0.01). Moreover, visual evaluation showed that the fluid in the Prismaflex V-chamber flowed uniformly as a swirl. In contrast, in the ACH-Σ V-chamber, the fluid flowed unevenly pulsating only at the bottom, and stagnation was observed in the upper layer of the chamber liquid surface. Conclusion : It was suggested that structural differences in the V-chamber may affect the retention in the V-chamber. </p>

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