SU1284555A1 - Apparatus for dosing blood - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is to reduce the possibility of blood infection due to the single use of elements that come into contact with blood. The device contains a dosing tank, consisting of body elements, pinch and control valves. Between the case elements there is a sealed blood supplying package. The inner surface of the housing elements are made spherical. Control housings are installed in each housing element. Valves 3 and 4 are made in the form of electromagnets and can pinch pipelines. The cavity between the body, the element and the membrane is connected to the source of the control medium through the control valve. The cavity between the membrane and the housing element is connected to this source by means of a choke. 1 il. (L

Description

N:

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4: I ate

11284555

Applies to medical7 ne ne 5 you

for dosing physiological media and is intended for use in an artificial kidney machine.

The purpose of the invention is to reduce the possibility of blood infection due to the single use of elements that come into contact with blood.

The drawing shows a diagram of the device.

The device comprises a dosing reservoir consisting of body elements 1 and 2, transfer valves 3 and 4 and a control valve 5.

Between the case elements 1 and 2 there is an airtight blood supplying package, made of two elastic membranes 6 and 7, the entrance

In the initial state, the membranes E) b and 7 occupy an arbitrary position, pinch valves 3 and 4 are turned on and clamped, respectively, of the pipeline 5 and 11, the control valve 5 is turned off and disconnects the cavity between the housing element 1 and the membrane 6 from the control source When the vacuum pressure is applied, the inlet valve 3 is turned off and the control valve 5 is turned on, the clamping of the pipeline 10 is stopped, and the cavity is connected between the body element 1 and membrane 5 with the source of the control medium.

Under the influence of the vacuum pressure, the cavity between the case element 1 and the membrane 6 of the opening 8 and the outlet 9 of the nozzles is installed from the control-medium through

the fitting 14 and the turned on control valve 5. Simultaneously, under the influence of the same vacuum pressure, the cavity is released from the control medium, waiting for the membrane 7 and the housing element 2. At the same time, the membrane 6 moves towards the housing element 1, the membrane 7 - towards body element 2, and in the cavity between the membranes 6 and 7, blood begins to flow through the inlet pipe 10 and the inlet fitting 8.

diametrically opposite between membranes 6 and 7, and inlet 10 and outlet 11 pipelines connected to inlet 8 and outlet 9 package fittings respectively,

The inner surfaces of the body elements 1 and 2 are spherical in shape and transverse and radial grooves 1-2 and 13 are applied to them, respectively. Control pins 14 and 15 are connected to the grooves in the frame of the housing element.

The inlet valve 3 is connected to the inlet pipe 10, and the outlet valve 4 is connected to the outlet pipe 11, and the valves are made, for example, in the form of electromagnets, acting on the rods, shifting accordingly the pipeline 10 i-shee 11.

The cavity was molded by housing element 1 and membrane 6 connected to a source of control medium (not shown) through control valve 5, and the cavity between membrane 7 and housing element 2 is connected to this source by means of fitting 15.

The device works as follows.

Before the operation begins, the device is connected through pipe 10 to the source from which blood flows, through pipe 11 to the load of the device, which in the initial state of the membrane E) b and 7 is in an arbitrary position, pinch valves 3 and 4 are turned on and clamped water 10 and 11, the control valve 5 is turned off and disconnects the cavity between the housing element 1 and the membrane 6 from the source of the control medium. When the vacuum pressure is applied, the inlet valve 3 turns off and the control valve turns on Pan 5, conduit 10 is stopped and the clamping is effected between the connection of the cavity housing element 1 and mem- brane 6 with the source of the control medium.

Under the influence of vacuum pressure, the cavity between the body element 1 and the membrane 6 has reached 5

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the fitting 14 and the turned on control valve 5. Simultaneously, under the influence of the same vacuum pressure, the cavity is released from the control medium, waiting for the membrane 7 and the housing element 2. At the same time, the membrane 6 moves towards the housing element 1, the membrane 7 - towards body element 2, and in the cavity between the membranes 6 and 7, blood begins to flow through the inlet pipe 10 and the inlet fitting 8.

As the membrane 6 is pressed against the inner surface of the body element 1, the control medium continues to transfer to the fitting 14 through the system of grooves 12 of this element. Similarly, as the membrane 7 is pressed against the inner surface of the body element 2, the control medium continues to move to the fitting 15 through the system of grooves 13 of this element. After the membranes 6 and 7 are completely connected to the inner surfaces of the body elements 1 and 2, the filling of the cavity between the membranes 6 and 7 with blood is stopped.

When overpressure is applied, the inlet valve 3 is first turned on and presses the inlet pipe 10, and then the control valve is turned off.

Ruya move; blood, and through unit 55, pan 5 and outlet valve 4, clamping

cer 15 - to the source of the control medium in which excessive and vacuum pressure are periodically created.

output line 11 is terminated.

Under the influence of overpressure, the cavity between the membrane 7 and,

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the body element 2 is filled with the control medium, the membrane 7 moves towards the membrane 6, which remains pressed against the inner surface of the body element 1, the blood moves from the cavity between the membranes and 7 through the outlet fitting 9 and the output pipe 11 to the load of the device. After the membrane 7 is pressed against the membrane 6, the movement of blood from the cavity between the membranes 6 and stops.

When supplying the vacuum distance, the control valve 5 and the outlet valve 4 are first turned on, the pipe 11 is clamped, the vacuum pressure holds the membrane 6 in the position in which this membrane is pressed against the inner surface of the housing element 1. Then the input valve 3 is turned off, the input pipe is clamped 10 is stopped, the membrane 7 is moved towards the body element 2, and blood begins to flow into the cavity between the membranes 6 and 7 through the inlet pipe 10 and the inlet plug 8 and the described cycle device operation is repeated.

For each recurring cycle, the device moves a dose of blood, the volume

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which is equal to the volume of the cavity between the membranes 6 and 7 in the position when these membranes are pressed respectively to the inner surfaces of the body elements 1 and 2.

The use of a replaceable blood supply package in the blood dosing device makes it possible to sterilize it in the factory, which significantly reduces the likelihood of blood infection in the device.

Claims (1)

Invention Formula A device for blood dosing, containing a sealed dosing tank with two spherical body elements with transverse and radial grooves on the inner surface of the elements and relief valves, characterized in that, in order to reduce the possibility of blood infection, it is equipped with a replaceable blood supply package made of two elastic membranes installed between the case elements and connected to the inlet and outlet fittings of the tank and the control valve installed between the control chassis body fittings, while the bypass valves are pinch filled.