JP4624301B2 - 心肺バイパスを用いた心臓手術のためのモニタリング・システム及び方法 - Google Patents
心肺バイパスを用いた心臓手術のためのモニタリング・システム及び方法 Download PDFInfo
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- JP4624301B2 JP4624301B2 JP2006133190A JP2006133190A JP4624301B2 JP 4624301 B2 JP4624301 B2 JP 4624301B2 JP 2006133190 A JP2006133190 A JP 2006133190A JP 2006133190 A JP2006133190 A JP 2006133190A JP 4624301 B2 JP4624301 B2 JP 4624301B2
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Description
VO2=流量×(動脈−静脈O2差)
に基づいている。
HCT:ヘマトクリット(%)
Hb:ヘモグロビン(g/dL)
CPB:心肺バイパス
T:温度(℃)
VO2=酸素消費量(mL/min)
VO2i=インデックスされた酸素消費量(oxygen consumption indexed)(mL/min/m2)
DO2=酸素送出量(mL/min)
DO2i=インデックスされた酸素送出量(oxygen delivery indexed)(mL/min/m2)
O2 ER=酸素抽出率(%)
VCO2=炭酸ガス生成量(mL/min)
VCO2i=インデックスされた炭酸ガス生成量(mL/min/m2)
Ve=換気量(L/min)
eCO2=呼気された炭酸ガス(mmHg)
AT=無酸素スレッショルド(anaerobic threshold)
LAC=乳酸塩
Qc=心臓送出量(mL/min)
IC=心係数(Qc/m2),(mL/min/m2)
Qp=ポンプ流量(mL/min)
IP=インデックスされたポンプ流量(Qp/m2),(mL/min/m2)
CaO2=動脈酸素含有量(mL/dL)
CvO2=静脈酸素含有量(mL/dL)
PaO2=動脈酸素張力(mmHg)
PvO2=静脈酸素張力(mmHg)
a=動脈
v=静脈
Sat=Hb飽和度(%)。
(2) VO2=Qp×(CaO2−CvO2) (CPB中において)
(3) DO2=Qc×CaO2 (正常な循環において)
(4) DO2=Qp×CaO2 (CPB中において)
(5) O2 ER=VO2/DO2(%)
(6) Hb=HCT/3
(7) CaO2=Hb×1.36×Sat(a)+PaO2×0.003
(8) CvO2=Hb×1.36×Sat(v)+PvO2×0.003
(9) VCO2=Ve×eCO2×1.15
Hb=15g/dL
PaO2=90mmHg
Sat(a)Hb=99%=0.99
PvO2=40mmHg
Sat(v)Hb=75%=0.75
Qc=5000mL/min
CaO2=15×1.36×0.99+90×0.003=20.4mL/dL
CvO2=15×1.36×0.75+40×0.003=15.4mL/dL
VO2=5L/min×(20.4mL/dL−15.4mL/dL)
=5L/min×5mL/dL=5L/min×50mL/L
=250mL/min
DO2=5L/min×20.4mL/dL=5L/min×200mL/L
=1000mL/min
O2 ER=250/1000=25%
VCO2=200mL/min
LAC≦1.5mMol/L
HLAC+NaHCO3=LAC Na+H2CO3
に従うので起こり、そしてH2CO3は、H2OとCO2とに分解され、従って更にCO2が生成される。
人工心肺装置に動作的に接続されたプロセッサと、
前記人工心肺装置のポンプに接続されて、ポンプ流量を連続的に測定し、そのポンプ流量データを前記プロセッサに送るポンプ流量読み取り装置と、
動脈又は静脈ライン内部に挿入されて、ヘマトクリット値を連続的に測定し、それを前記プロセッサに送るヘマトクリット値読み取り装置と、
オペレータが動脈酸素飽和度(Sat(a))及び動脈酸素張力(PaO2)についてのデータを手動で入力するのを可能にするデータ入力装置と、
前記プロセッサに統合化されて、酸素送出(DO2i)値を前記の測定されたポンプ流量(Qp)、前記の測定されたヘマトクリット(HCT)、動脈酸素飽和度(Sat(a))のプリセット値、及び動脈酸素張力(PaO2)のプリセット値に基づいて計算する計算手段と、
前記プロセッサに接続されて、前記の計算されたDO2i値をリアルタイムで表示するディスプレイとを含む。
モニタリング・システム10の全面部分に配置されたノブ50(図7及び図8)を用いて、オペレータは、データを入力し得て、当該データは、モニタリング・システム10のプロセッサ・メモリにより格納されるであろう。オペレータにより手動で挿入されるデータは、次のとおりである。
(2)動脈酸素飽和度(Sat(a))。CPB処置中のこの値は、通常100%である。しかしながら、酸素付加装置の機能不全のような異常事象の場合には、酸素飽和度(Sat(a))の値は、低減し得る。この場合、オペレータは、ノブ50を用いてこの値を手動で変え得る。
モニタリング・システム10は、人工心肺装置3の特定の位置に配置された適切なセンサにより収集されたデータを連続的に受け取るように人工心肺装置3への或る電気的接続手段が設けられている。これらの連続的に収集されたデータは、次のとおりである。
1.Ranucci M、Pavesi M、MazzaE他:心冠手術後の腎臓機能不全の危険因子;心肺バイパス技術の役割(Perfusion、1994年、9:319−26)
2.Stanfford−Smith M、Conlon PJ、WhiteWD他:CPB中の潅流圧でなく低ヘマトクリットがCABG手術に続く腎臓不全を予測する(要約)(Anesth Analg、1998年、86:SCA11−124)
3.Fang WC、Helm RE、KriegerKH他:冠動脈手術を受けている患者死因別死亡率に対する心肺バイパス中の最小ヘマトクリットの影響(Circulation、1997年;96(supplII):194−9)
4.Habib RH、Zacharias A、Schwann TA、Riordan CJ、Durham SJ、Shah A:成人における心肺バイパス中の低ヘマトクリットの悪影響:現在の実施は変えるべきか?(J Thorac Cardiovasac Surg、2003年;125:1438−50)
5.Swaminathan M、Phillips−Bute BG、Conlon PJ、Smith PK、NewmanMF、Stanfford−Smith M:心肺バイパス中の最低ヘマトクリットと冠動脈バイパス手術後の急性腎臓損傷との関連性(AnnThorac Surg、2003年;76:784−92)
6.Karkouti K、Beattie WS、WijeysunderaDN他:心肺バイパス中の血液希釈は、成人の心臓手術における急性腎臓不全に対する独立危険因子である。(J Thorac Cardiovasac Surg、2005年;129:391−400)
7.Ranucci M、Romitti F、IsgroG他:心肺バイパス中の酸素供給、及び冠動脈手術に続く急性腎臓不全(Ann Thorac Surg、2005年、印刷中)
8.Ranucci M、Menicanti L、Frigiola A:心肺バイパス中の急性腎臓損傷及び最低ヘマトクリット:細胞の低酸素血の事項のみでなく。(Ann Thorac Surg、2004年;78:1880−1)
9.Demers P、Elkouri S、MartimeauR他:「成人の心臓手術における心肺バイパス中の高い血液乳酸レベルによる結果(Ann Thorac Surg、2000年;70:2082−6)
2 手術台
3 人工心肺装置
4 ポンプ
5 酸素付加装置
10 モニタリング・システム
11 ディスプレイ
12、13、14、15、17、19 計算プログラム
18、20 比較器
40 温度プローブ
41 CO2検出器
42 ヘマトクリット読み取りセル
43 ドップラー読み取りセル
51、53、54、55、56、57、59、61、62 窓
52 グラフィカル・パターン
Claims (2)
- 心肺バイパスを用いた心臓手術のためのモニタリング・システム(10)であって、
人工心肺装置(3)に動作的に接続されたプロセッサと、
前記人工心肺装置(3)の酸素付加装置(5)に配置されて、呼出されたCO2(eCO2)値を連続的に検出し、それを前記プロセッサに送るCO2検出装置(41)と、
オペレータが前記人工心肺装置(3)のガス流量(Ve)についてのデータを手動で入力することを可能にするデータ入力装置(50)と、
プリセットされたガス流量(Ve)及び検出された呼出CO2(eCO2)からCO2生成量(VCO2i)を計算することが可能である計算手段(19)と、
前記プロセッサに接続されて、前記の計算されたCO2生成量(VCO2i)をリアルタイムで表示するディスプレイ(11)と
を備え、
前記の計算されたCO 2 生成(VCO 2i )値をCO 2 生成スレッショルド値(VCO 2icrit )と比較する比較手段(20)と、
前記のCO 2 生成(VCO 2i )値がCO 2 生成スレッショルド値(VCO 2icrit )を超えるとき常に起動される警報装置(21)と、
を更に備えるモニタリング・システム(10)。 - 前記CO 2 生成スレッショルド値(VCO 2icrit )が、60ml/min/m 2 においてプリセットされる、請求項1に記載のモニタリング・システム(10)。
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EP (2) | EP1721571B1 (ja) |
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AT (1) | ATE434971T1 (ja) |
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EP1721571B1 (en) | 2009-07-01 |
US10039490B2 (en) | 2018-08-07 |
DE602005015192D1 (de) | 2009-08-13 |
US20190104986A1 (en) | 2019-04-11 |
US20060257283A1 (en) | 2006-11-16 |
ITMI20050866A1 (it) | 2006-11-14 |
US20090043219A1 (en) | 2009-02-12 |
US7931601B2 (en) | 2011-04-26 |
US20150272487A1 (en) | 2015-10-01 |
US20220386907A1 (en) | 2022-12-08 |
EP2092881B1 (en) | 2015-07-08 |
EP2092881A1 (en) | 2009-08-26 |
US8690784B2 (en) | 2014-04-08 |
ATE434971T1 (de) | 2009-07-15 |
US20090043173A1 (en) | 2009-02-12 |
US20130096398A1 (en) | 2013-04-18 |
US20090043212A1 (en) | 2009-02-12 |
EP1721571A2 (en) | 2006-11-15 |
US7435220B2 (en) | 2008-10-14 |
US7927286B2 (en) | 2011-04-19 |
EP1721571A3 (en) | 2007-09-12 |
US20140050616A1 (en) | 2014-02-20 |
US20140296676A1 (en) | 2014-10-02 |
US11452468B2 (en) | 2022-09-27 |
JP2006314800A (ja) | 2006-11-24 |
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