JP6808627B2 - 呼吸の吸気相及び呼気相の両方で推定される患者肺コンプライアンスを使用してベンチレータと患者の分離を検出するためのシステム及び方法 - Google Patents
呼吸の吸気相及び呼気相の両方で推定される患者肺コンプライアンスを使用してベンチレータと患者の分離を検出するためのシステム及び方法 Download PDFInfo
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Description
Claims (11)
- 患者に呼吸ガスを供給し、吸気相及び呼気相を含む呼吸サイクルを有するベンチレータ呼吸システムであって、当該ベンチレータ呼吸システムは、
ガス供給装置と、
前記ガス供給装置に結合された患者チューブ回路と、
前記患者チューブ回路に関連し、少なくとも流量及び圧力を監視するガス監視システムと、
前記ガス監視システムに結合され、前記呼吸サイクルの前記吸気相中に供給され前記呼吸サイクルの前記呼気相中に排出される決定されたガスの体積と、前記呼吸サイクルの前記吸気相及び呼気相中に前記患者チューブ回路内で監視された圧力とに基づいて患者肺コンプライアンス比を推定することにより、前記ベンチレータ呼吸システムからの患者分離を判定する、制御ユニットと、
を含み、
前記制御ユニットは、前記呼吸サイクルの前記吸気相中の吸気時患者肺コンプライアンスを推定し、前記呼吸サイクルの前記呼気相中の呼気時患者肺コンプライアンスを推定することにより前記患者肺コンプライアンス比を推定し、前記制御ユニットは、推定された前記患者肺コンプライアンス比を閾値と比較することにより前記ベンチレータ呼吸システムからの前記患者分離を判定する、ベンチレータ呼吸システム。 - 前記患者チューブ回路は、チューブ回路ワイを介して互いに流体連通する患者インターフェース、吸気ブランチ及び呼気ブランチを含み、前記ガス監視システムは、1つ以上の吸気ブランチセンサ及び1つ以上の呼気ブランチセンサを含む複数のセンサを含む、請求項1に記載のベンチレータ呼吸システム。
- 前記ガス供給装置はポンプ及びリザーバを含む、請求項1に記載のベンチレータ呼吸システム。
- 前記制御ユニットは、前記呼吸サイクルの前記吸気相中に供給される前記決定されたガスの体積、前記吸気相の開始時の前記患者チューブ回路内で監視されたガスの圧力、及び前記吸気相の終了時の前記患者チューブ回路内で監視されたガスの圧力に基づいて吸気時患者肺コンプライアンスを推定する、請求項1に記載のベンチレータ呼吸システム。
- 前記制御ユニットは、前記呼吸サイクルの前記呼気相中に排出される前記決定されたガスの体積、前記呼気相の終了時の前記患者チューブ回路内で監視されたガスの圧力、及び前記吸気相の終了時の前記患者チューブ回路内で監視されたガスの圧力に基づいて呼気時患者肺コンプライアンスを推定する、請求項1に記載のベンチレータ呼吸システム。
- 前記患者肺コンプライアンス比=(Cinh/Cexh)であり、Cinhは前記吸気相中に推定される前記吸気時患者肺コンプライアンスであり、Cinh=Vinh/(Peoi−Pboi)として計算され、Cexhは前記呼気相中に推定される前記呼気時患者肺コンプライアンスであり、Cexh=Vexh/(Peoi−Peoe)として計算され、ここでVinh=前記吸気相中に供給されるガスの体積、Vexh=前記呼気相中に排出されるガスの体積、Pboi=前記吸気相の開始時に前記患者チューブ回路内で監視される圧力、Peoi=前記吸気相の終了時に前記患者チューブ回路内で監視される圧力、Peoe=前記呼気相の終了時に前記患者チューブ回路内で監視される圧力である、請求項1に記載のベンチレータ呼吸システム。
- 患者チューブ回路を介して患者に呼吸ガスを供給し、吸気相及び呼気相を含む呼吸サイクルを有するベンチレータ呼吸システムを制御するためプロセッサにより実行される機械可読命令を記憶した持続性コンピュータ可読記憶媒体であって、前記機械可読命令は、
前記患者チューブ回路内のガスの少なくとも流量及び圧力を監視することと、
前記呼吸サイクルの前記吸気相中に供給され前記呼吸サイクルの前記呼気相中に排出される決定されたガスの体積と、前記呼吸サイクルの前記吸気相及び呼気相中に前記患者チューブ回路内で監視された圧力とに基づいて患者肺コンプライアンス比を推定することと、
推定された前記患者肺コンプライアンス比を閾値と比較することにより患者分離を判定することと
を含む、前記ベンチレータ呼吸システムからの患者分離を判定するプロセスを前記ベンチレータ呼吸システムに実行させ、
前記患者肺コンプライアンス比を推定することは、前記呼吸サイクルの前記吸気相中の吸気時患者肺コンプライアンスを推定することと、前記呼吸サイクルの前記呼気相中の呼気時患者肺コンプライアンスを推定することとを含む、持続性コンピュータ可読記憶媒体。 - 前記患者チューブ回路は、チューブ回路ワイを介して互いに流体連通する患者インターフェース、吸気ブランチ及び呼気ブランチを含み、前記監視することは、前記吸気ブランチ及び前記呼気ブランチ内の複数のセンサからの信号を処理することを含む、請求項7に記載の持続性コンピュータ可読記憶媒体。
- 前記吸気時患者肺コンプライアンスを推定することは、前記呼吸サイクルの前記吸気相中に供給される前記決定されたガスの体積、前記吸気相の開始時に前記患者チューブ回路内で監視されたガスの圧力、及び前記吸気相の終了時に前記患者チューブ回路内で監視されたガスの圧力に基づく、請求項7に記載の持続性コンピュータ可読記憶媒体。
- 前記呼気時患者肺コンプライアンスを推定することは、前記呼吸サイクルの前記呼気相中に排出される前記決定されたガスの体積、前記呼気相の終了時に前記患者チューブ回路内で監視されたガスの圧力、及び前記吸気相の前記終了時に前記患者チューブ回路内で監視されたガスの圧力に基づく、請求項7に記載の持続性コンピュータ可読記憶媒体。
- 前記患者肺コンプライアンス比=(Cinh/Cexh)であり、Cinhは前記吸気相中に推定される前記吸気時患者肺コンプライアンスであり、Cinh=Vinh/(Peoi−Pboi)として計算され、Cexhは前記呼気相中に推定される前記呼気時患者肺コンプライアンスであり、Cexh=Vexh/(Peoi−Peoe)として計算され、ここでVinh=前記吸気相中に供給されるガスの体積、Vexh=前記呼気相中に排出されるガスの体積、Pboi=前記吸気相の開始時に前記患者チューブ回路内で監視される圧力、Peoi=前記吸気相の終了時に前記患者チューブ回路内で監視される圧力、Peoe=前記呼気相の終了時に前記患者チューブ回路内で監視される圧力である、請求項7に記載の持続性コンピュータ可読記憶媒体。
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