Blood dialyzing method and apparatus
First Claim
1. A method for blood dialysis performed by the use of at least one dialyzer characterized in that the supply of dialyzing solution to the dialyzer is carried intermittently, a plurality of dialyzers are employed and the supply of dialyzing solution from at least one source of the dialyzing solution is performed on a time sharing basis.
1 Assignment
0 Petitions
Accused Products
Abstract
The blood of a patient to be dialyzed is circulated out of the patient'"'"'s body through an extracorporeal circuit including a blood pump and a dialyzer. The dialyzer has a solution supply piping for the supply of a dialyzing solution thereto and a discharge piping for the discharge of the dialyzing solution therefrom, and the discharge piping is branched into a discharge passage and a metering passage. The supply piping, the discharge passage and the metering passage have disposed thereon a supply control valve, a discharge control valve and a combination of a metering valve and a metering device, respectively. During a washing step, the supply control valve is opened while the discharge and metering control valves are opened and closed, respectively, so that the dialyzing solution within the dialyzer is replenished. During a dialyzing step, only the metering valve is opened so that the water removal can take place in the dialyzer and the quantity of the dialyzing solution increased as a result of the water removal can be measured by the metering device. The washing and dialyzing steps are alternately and cyclically performed.
-
Citations
6 Claims
-
1. A method for blood dialysis performed by the use of at least one dialyzer characterized in that the supply of dialyzing solution to the dialyzer is carried intermittently, a plurality of dialyzers are employed and the supply of dialyzing solution from at least one source of the dialyzing solution is performed on a time sharing basis.
- 2. An apparatus for carrying out the blood dialysis by the use of at least one dialyzer characterized in that there is provided a solution supply control valve on a solution supply piping for the supply of a dialyzing solution to the dialyzer, said solution supply control valve being closed during the performance of blood dialysis to interrupt the supply of the dialyzing solution to the dialyzer, but being controlled so as to open intermittently, dialyzing solution being supplied to the dialyzer during the intermittent opening of the solution supply control valve and a discharge piping leading from the dialy zer is branched to provide a metering passage and a discharge passage, said metering passage having a measuring device for the measurement of the quantity of the dialyzing solution flowing therethrough, said discharge passage bypassing said metering device, said metering and discharge passages being provided respectively with a metering control valve and a discharge control valve, said metering control valve and said discharge control valve being opened and closed, respectively, during the closure of the solution supply control valve, but being closed and opened, respectively, during the opening of the solution supply control valve.
- 5. An apparatus for carrying out the blood dialysis, which comprises a common source of dialyzing solution, a plurality of dialyzers fluid-connected with said common solution source through respective supply pipings, a solution supply control valve disposed on each of the supply pipings, and a signal generator for generating pulse signals to the respective solution supply control valves on a time sharing basis, each of said solution supply control valves being opened in response to the associated pulse signal for a predetermined time.
Specification