Blood purification apparatus
First Claim
1. A blood purification apparatus comprising:
- a blood circuit including an arterial blood circuit and a venous blood circuit and through which blood of a patient is allowed to extracorporeally circulate;
a blood purifier connected to the blood circuit that is capable of purifying the blood extracorporeally while circulating through the blood circuit;
a dialysate introduction line supplied with a predetermined liquid from a liquid-feeding device and through which a dialysate is introduced into the blood purifier, the liquid-feeding device being capable of feeding the liquid at a constant pressure;
a dialysate drain line through which waste water is discharged from the blood purifier;
a substitution line one end of which is connected to a collecting port provided at a predetermined position of the dialysate introduction line and an other end of which is connected to the arterial blood circuit or the venous blood circuit;
a displacement-type pump provided on the dialysate introduction line or the substitution line;
a closing device provided to the substitution line and that is capable of arbitrarily closing a flow route provided by the substitution line, the closing device being configured to form, in a state where the flow route is closed, a pressure-increasing portion that includes the collecting port; and
a pressure-measuring device capable of measuring a pressure in the pressure-increasing portion,the blood purification apparatus performing a testing process in which connection of the substitution line to the collecting port is checked by increasing a liquid pressure in the pressure-increasing portion and measuring the pressure with the pressure-measuring device,wherein the testing process is performed by increasing the liquid pressure in the pressure-increasing portion by utilizing a liquid-feeding pressure applied from the liquid-feeding device, and the liquid-feeding device generates the liquid-feeding pressure by activation of a non-displacement-type or a level difference of the dialysate in the liquid-feeding device relative to the dialysate in the pressure-increasing portion and not by the displacement-type pump.
1 Assignment
0 Petitions
Accused Products
Abstract
The present teachings relate to a blood purification apparatus in which the connection of a substitution line to a collecting port can be checked accurately and instantly and even during blood purification treatment. A blood purification apparatus includes a blood circuit, a dialyzer, a dialysate introduction line, a dialysate drain line, a substitution line one end of which is connected to a collecting port provided at a predetermined position of the dialysate introduction line and an other end of which is connected to the blood circuit, a substitution pump configured to form a pressure-increasing portion that includes the collecting port, and a pressure-measuring device capable of measuring a pressure in the pressure-increasing portion. The blood purification apparatus performs a testing process by increasing a liquid pressure in the pressure-increasing portion by utilizing a liquid-feeding pressure applied from a liquid-feeding device and measuring the pressure with the pressure-measuring device.
10 Citations
19 Claims
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1. A blood purification apparatus comprising:
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a blood circuit including an arterial blood circuit and a venous blood circuit and through which blood of a patient is allowed to extracorporeally circulate; a blood purifier connected to the blood circuit that is capable of purifying the blood extracorporeally while circulating through the blood circuit; a dialysate introduction line supplied with a predetermined liquid from a liquid-feeding device and through which a dialysate is introduced into the blood purifier, the liquid-feeding device being capable of feeding the liquid at a constant pressure; a dialysate drain line through which waste water is discharged from the blood purifier; a substitution line one end of which is connected to a collecting port provided at a predetermined position of the dialysate introduction line and an other end of which is connected to the arterial blood circuit or the venous blood circuit; a displacement-type pump provided on the dialysate introduction line or the substitution line; a closing device provided to the substitution line and that is capable of arbitrarily closing a flow route provided by the substitution line, the closing device being configured to form, in a state where the flow route is closed, a pressure-increasing portion that includes the collecting port; and a pressure-measuring device capable of measuring a pressure in the pressure-increasing portion, the blood purification apparatus performing a testing process in which connection of the substitution line to the collecting port is checked by increasing a liquid pressure in the pressure-increasing portion and measuring the pressure with the pressure-measuring device, wherein the testing process is performed by increasing the liquid pressure in the pressure-increasing portion by utilizing a liquid-feeding pressure applied from the liquid-feeding device, and the liquid-feeding device generates the liquid-feeding pressure by activation of a non-displacement-type or a level difference of the dialysate in the liquid-feeding device relative to the dialysate in the pressure-increasing portion and not by the displacement-type pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification