The blood treatment device null which has the device which calculates manner and feature, and fistula recycling factor or the heart lung recycling amount factor calculating the recycling factor or heart lung recycling factor with
This invention the blood chamber and the dialysis fluid chamber (9) the diamond riser which is divided (6) the blood chamber (8) passing the blood which it should process, the semipermeable membrane (7) due to, flows into external blood circuit (i), the dialysis fluid, passes by the dialysis fluid chamber of the diamond riser inside dialysis fluid route (ii) and flows, during external blood processing recycling ratio with fistula and/or it regards the method of calculating heart lung recycling amount ratio. In addition, this invention, recycling ratio with fistula and/or recycling ratio with the device, and the fistula which calculate heart lung recycling amount ratio and/or regards the blood processing device which has the device which calculates heart lung recycling amount ratio. Method and the device by this invention are based on seeking fistula recycling ratio (R) with heart lung recycling amount ratio (R) harmony namely entire recycling ratio (R), in regard to two blood flows which differ mutually. Next, from the recycling ratio regarding two blood flows, fistula recycling ratio and/or heart lung recycling amount ratio is required. It is done the high blood flow where 1st recycling ratio measurement are times when fistula recycling occurs (Q) to in regard, as for 2nd measurement, fistula recycling does not occur, it is done low blood flow (Q) to in regard. These two measurable quantities, fistula recycling ratio and/or form the foundation in order to obtain heart lung recycling amount ratio.本発明は、処理すべき血液が、半透膜(7)によって血液チャンバと透析流体チャンバ(9)に分割されたダイアライザ(6)の血液チャンバ(8)を通って体外血液回路(I)内に流れ、透析流体が、透析流体経路(II)内でダイアライザの透析流体チャンバを通って流れる、体外血液処理中にフィステルでの再循環率および/または心肺再循環分率を求める方法に関する。また、本発明は、フィステルでの再循環率および/または心肺再循環分率を求めるデバイス、およびフィステルでの再循環率および/または心肺再循環分率を求めるデバイスを備える血液処理デバイスに関する。本発明による方法およびデバイスは、フィステル再循環率(RA)と心肺再循環分率(RCP)の和、すなわち総再循環率(R)を、互いに異なる2つの血流量に関して求めることに基づく。次いで、2つの血流量に関する再循環率から、フィステル再循環率および/または心肺再循環分率が求められる。第1の再循環率測定は、フィステル再循環が生じることがある高い血流量(QBH)に関して行われ、第2の測定は、フィステル再循環が生じない低い血流量(QBL)
