RU2706355C1 - Device for leukofiltration of blood components - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to devices for leucofiltration. Device for leukofiltration of blood components comprises a wheel base with a handle, a first supporting device in the form of a frame with hooks, adapted for lifting or lowering containers with blood components, and second support in form of tray for receiving containers, drive for lifting or lowering first support means, storage battery, microcontroller, weight sensors, voltage sensor, current sensor, weight indicator, indicator of discharge of accumulator battery, indicator of termination of leucofiltration process connected with microcontroller. Drive is made as reversible reduction motor connected with lead screw, driving sliding nut and internal cylinder connected to it with first supporting device fixed thereon relative to outer cylinder, outer cylinder and second support are fixed on wheelbase, lead screw is fixed in bearings, fixed on outer and inner cylinders respectively. On the wheel base handle is a switch for lifting and lowering modes of the first supporting means, upper and lower limit switches are located respectively in upper and lower parts of external cylinder, voltage sensor is connected to poles of accumulator battery, current sensor is connected between first pole of storage battery and switch of modes of lifting and lowering, upper and lower limit switches are connected to microcontroller, and second supporting device is fixed on weight sensors installed on wheel base. Device also has a heat-insulated chamber with a door, a thermo-battery unit connected to the microcontroller, as well as the first and the second temperature sensors connected to the microcontroller and located respectively in the zones of the supporting devices.

EFFECT: invention provides higher efficiency and quality of harvested blood components by observing temperature conditions of the leucofiltration process.

1 cl, 1 dwg

Description

The invention relates to technical devices used in medicine, in particular, can be used at blood transfusion stations, in blood transfusion departments, in blood banks, in surgical and resuscitation departments of hospitals and clinics, as well as in medical research institutions.

A device is known - a rack for leukofiltration of blood or its components in containers under the action of gravity through tubular lines through the appropriate filters into the appropriate receiving containers (see US 2003/0106969, class F16M 11/00, 06/12/2003), containing a wheelbase with with a handle, the first supporting means in the form of a frame with hooks, adapted for raising or lowering blood containers or its components, and the second supporting means in the form of pallets for receiving containers, the drive for raising or lowering I first support means. The drive contains hydraulic or pneumatic cylinders equipped with electric pumps or compressed gas cylinders.

The specified device allows you to quickly adjust the height of the containers with blood or its components.

A device is known - an autonomous mobile stand (see RU 2509550, C2, class A61J 1/14, 03/20/2014) for the leukofiltration of blood components in containers under the action of gravity through tubular lines through the appropriate filters into the respective receiving containers containing a wheelbase with with a handle, the first supporting means in the form of a frame with hooks, adapted for raising or lowering containers with blood components, and the second supporting means in the form of a pallet for accommodating receiving containers, a drive for lifting or lowering the first supporting means, the battery, and the drive is made in the form of a reversible geared motor connected through an elastic coupling with a lead screw that translates the driving nut and its associated inner cylinder with the first supporting means fixed to it relative to the outer cylinder, the inner cylinder and the outer cylinder is made in the form of pipes of rectangular or circular cross-section, the outer cylinder and the second supporting means are fixed on the wheel Firstly, the lead screw is fixed in bearings mounted respectively on the outer and inner cylinders, on the wheelbase handle there is a switch for raising and lowering the first supporting means, and upper and lower limit switches located respectively in the upper and lower parts of the outer cylinder.

Closest to the claimed invention is a device - an autonomous mobile stand (RU 2623078, C1, CL A61J 1/14, 03/09/2016). The disadvantage of this device is the inability to provide the specified temperature during the filtering of blood transfusion media, since the temperature in the areas of containers with blood components should be in the range from + 4 ° С to + 6 ° С (see Transfusion Technologies. Monograph / A.G. Gudkov, M.I. Lazarenko, V.Yu. Leushin, A.V. Chechetkin .- M. SAYNS-PRESS, 2012. - 272 pp., Ill. (Scientific series "Technological innovations", p. 185), which leads to a decrease in the quality of harvested blood components.

The technical result to which the invention is directed is to eliminate this drawback.

The specified technical result is achieved in that the device for leukofiltration of blood components in containers under the action of gravity by means of tubular lines through the appropriate filters into the respective receiving containers, containing a wheelbase with a handle, the first supporting means in the form of a frame with hooks, adapted for raising or lowering the containers with blood components, and a second support means in the form of a pallet for receiving containers, a drive for raising or lowering the first about the supporting means, the battery, and the drive is made in the form of a reversible geared motor connected through an elastic coupling with a lead screw, which translates the driving nut and the associated inner cylinder with the first supporting means fixed on it relative to the outer cylinder, the inner cylinder and the outer the cylinder is made in the form of pipes of rectangular or circular cross-section, the outer cylinder and the second supporting means are fixed to the wheel base, running wines fixed in bearings mounted respectively on the outer and inner cylinders, on the handle of the wheelbase there is a switch for raising and lowering the first supporting means, the upper and lower limit switches located respectively in the upper and lower parts of the outer cylinder, contains a microcontroller, weight sensors, a voltage sensor , current sensor, weight indicator, battery discharge indicator, indicator of the end of the leukofiltration process associated with the microcontroller, the sensor is voltage It is connected to the poles of the battery, a current sensor is connected between the first pole of the battery and the switch for raising and lowering the modes, the upper and lower limit switches are connected to the microcontroller, and the second supporting means is mounted on weight sensors installed on the wheel base, it contains a heat-insulated chamber with a door , a thermal battery unit associated with the microcontroller, as well as the first and second temperature sensors located respectively in the zones of the first and second supporting devices related to the microcontroller.

The drawing shows a principal device for leukofiltration of blood components.

The drawing shows:

1. Containers with filtered blood components;

2. Tubular lines;

3. Filter;

4. Receiving containers for filtered blood components;

5. Wheelbase;

6. Wheelbase handle;

7. The first supporting tool;

8. The second supporting tool;

9. Reversible gear motor;

10. Battery

11. Flexible coupling;

12. Lead screw;

13. Running nut;

14. The inner cylinder;

15. The outer cylinder;

16. bearings;

17. The switch modes of raising and lowering;

18. The upper limit switch;

19. Lower limit switch;

20. The microcontroller;

21. weight sensor;

22. Voltage sensor;

23. Electric current sensor;

24. weight indicator;

25. Battery discharge indicator;

26. An indicator of the end of the leukofiltration process;

27. Thermally insulated chamber;

28. The door is glazed;

29. Thermal battery;

30. The first temperature sensor;

31. The second temperature sensor.

The operation of the device for leukofiltration of blood components is as follows.

For convenience, the wheelbase with a handle and structural elements located on it is placed outside the heat-insulated chamber.

The first supporting means 7, mounted on the inner cylinder 14, is moved vertically (up, down) along the outer cylinder 15 to a height convenient for securing containers with filtered blood components by means of a reversible geared motor 9, supplying it with the necessary polarity voltage using the mode switch raising and lowering 17. In this case, the inner cylinder 14 together with the first supporting means 7 are moved by means of a driving nut 13, rigidly connected with the inner cylinder 14. Ho the nut 13 moves along the lead screw 12. The upper and lower ends of the lead screw 12 are fixed in the bearings 16 so that the lead screw 12 can rotate freely around its axis and cannot move along the outer cylinder 15, and the inner cylinder 14 moves freely along the lead screw 12, while maintaining alignment with the lead screw 12 and the outer cylinder 15. To prevent rotation of the inner cylinder 14 relative to the outer cylinder 15, the inner cylinder is made in the form of a pipe of rectangular cross section. In the case when the inner cylinder 14 is made in the form of a pipe of circular cross section, to prevent its rotation relative to the outer cylinder 15, a guide may be provided mounted on the inner surface of the outer cylinder 15 parallel to its axis. When the lead screw 14 is rotated, the lead nut 13 is brought into linear motion by it, which ensures the forward movement of the inner cylinder 14 with the supporting means 7 fixed relative to the outer cylinder 15. The lead screw 12 is rotated by a reversible geared motor 9 by means of an elastic coupling 11. To rotate to the right side of the lead screw 12 to the reversing gear motor 9 is supplied with the voltage of the required polarity through the switch modes of raising and lowering 17. Elastic coupling 11 serves to compensate for lack of concentricity of the shaft reversing gear motor 9 and the screw shaft 12, and also to prevent jamming of the lead nut 13 in lowermost and uppermost positions. The moment of rotation transmitted by the flexible coupling 11 is less than the tightening torque of the spindle nut 13 on the spindle 12, which allows the flexible coupling 11 to deform and prevent breakage of the reversing gear motor 9 in emergency situations. To prevent jamming of the driving nut 13 are also the upper and lower limit switches 18 and 19, which limit its progress. The upper and lower limit switches 18 and 19 break the power circuit of the reversing gear motor 9 when the travel nut approaches the bearings mounted on the ends of the lead screw. To prevent failure of the motor 9 when the first supporting means 7 is overloaded, an electric current sensor 23 is provided. When the electric current consumed by the electric motor 9 from the battery 10 exceeds a predetermined value, the microcontroller 20 transmits a signal to the discharge indicator of the battery 25. Also an electric current sensor 23 is used to determine the health of the battery. When the value of the electric current consumed by the electric motor 9 from the battery 10 is lower than the set value, the microcontroller 20 transmits a signal to the discharge indicator of the battery 25. The discharge indicator of the battery can be made in the form of a semiconductor light emitter and sound emitter. The ability to control the degree of charge and the health of the battery helps to improve the quality of the harvested blood components.

After installing the first supporting means 7 to the required height, containers 1 with filtered blood components are placed on it, pre-connected to the receiving containers 4 through filters 3 by means of tubular lines 2 in a "clean room". The receiving containers 4 are placed on the second supporting means 8. To ensure maximum filtering speed, the first supporting means 7 is moved to the highest possible position. At the same time, the tubular lines 2 should be straightened, and the receiving containers 4 should be located on the second supporting means 8 and not hang on the tubular lines 2.

The wheelbase with the manual and structural elements placed on it, containers with blood components, receiving containers and filters is moved to a heat-insulated chamber with a glazed door, and the door of the heat-insulated chamber is closed.

During the filtration process, blood components flow from containers 1 located on the first supporting means 7, into containers 4 located on the second supporting means 8, along the highways 2 through filters 3 under the action of their own gravity. The filtration process ends when the blood or its components completely flow into the receiving containers 4 located on the second supporting means 8. The end of the filtering process is controlled by weight sensors 21 located between the second supporting means 8 and the wheel base 5. The beginning of the filtration is determined by the beginning of the increase in the mass of containers 4 located on the second supported medium 8. The end of the filtration is determined by the end of the increase in the mass of containers 4 located on the second supported medium 8. The values of the weight sensors 21 are read by the microcontroller 20. The weight values are displayed on the weight indicator 24. The duration of the leukofiltration of blood components on average is 1.5 hours. At the end of leukofiltration, the microcontroller includes an indicator of the end of leukofiltration 26. An indicator of the end of the leukofiltration 26 can be made in the form of a semiconductor light emitter and an audio indicator. The operator can monitor the indicators during the leukofiltration of blood components through the glass door of a thermally insulated chamber.

The weight indicator 24 and the indicator of the end of the leukofiltration process 26, which can be made in the form of digital segment indicators or a graphic display, are located near the glass door of the heat-insulated chamber for the convenience of work. The ability to control the weight of filtered blood components and the presence of an indicator of the end of the leukofiltration process increase staff productivity.

The switch modes of raising and lowering the first supporting means 17 is a dual three-position electric switch. The switch is connected to a reversible gear motor 9, the first pole of the battery 10 through an electric current sensor 23, the upper and lower limit switches 18 and 19, the upper and lower limit switches are connected to the second pole of the battery.

In the first position, the first contacts of both switch groups are closed with the second contacts of their groups, in the second position, all contacts are open, in the third position, the first contacts of both switch groups are closed with the third contacts of their groups. The voltage from the battery 10 is supplied to the switch for raising and lowering the modes 17 so that in the first position of the switch to the reversing gear motor 9, the voltage of direct polarity is supplied, in the second position of the switch to the reversing gear motor 9, the voltage is not applied, in the third position of the switch to reversing gear motor 9 is supplied with voltage of reverse polarity. When translating the switch modes of raising and lowering 17 in the first and second positions, the motor rotates in different directions. To the switch of the modes of raising and lowering 17, the voltage is supplied through the upper and lower limit switches 18 and 19, when the travel nut 13 between the extreme upper and extreme lower positions. When the travel nut 13 is in its highest position, the upper limit switch 18 opens the power supply circuit of the reversible gear motor 9, when the travel nut 13 is in its extreme lower position, the lower limit switch 19 opens the power supply circuit of the reversible gear motor 9. The reversible gear motor 9 is stopped, preventing jamming of the travel nut 13.

The microcontroller 20, using the upper 30 and lower 31 temperature sensors, measures the temperature in the zones of the first and second supporting devices, namely, where the containers with blood components to be leukofiltered and the receiving containers with filtered blood components are located. This temperature measurement data is used in the temperature control system inside the insulated chamber by changing the power mode of the thermopile 29 using the microcontroller 20 program. The thermopile can be made on Peltier semiconductor thermocouples.

Thus, inside the thermally insulated chamber, the temperature is maintained within the specified limits from + 4 ° C to + 6 ° C.

After the end of the leukofiltration process, open the door 28 of the insulated chamber 27 and move the wheelbase with the structural elements placed on it, containers with blood components, receiving containers and filters into the area outside the insulated chamber. From the containers with filtered blood components 4, air is removed, the containers 4 are sealed, disconnected from the highways 2 and removed from the second support means 8. By means of the switch for raising and lowering the modes 17, the first support means 7 are set to a convenient height for work, empty containers 1 with highways 2 and filters 3 are removed from the first support means 7 and disposed of.

All nodes of the device for leukofiltration of blood components are made on widely used standard elements, in particular, switches are made on such elements as relays and transistors. The microcontroller is based on a microprocessor type NPC LPC2168.

The invention improves the productivity of staff and ensures the quality of the harvested blood components due to compliance with the prescribed temperature regulation of the leukofiltration process.

Claims (2)

1. A device for leukofiltration of blood components in containers under the action of gravity by means of tubular lines through appropriate filters to appropriate receiving containers containing a wheelbase with a handle, the first supporting means in the form of a frame with hooks, adapted for raising or lowering containers with blood components, and second support means in the form of a pallet for receiving containers, a drive for raising or lowering the first supporting means, a battery moreover, the drive is made in the form of a reversible geared motor connected through an elastic coupling with a lead screw, which translates the driving nut and its associated inner cylinder with the first supporting means fixed thereto relative to the outer cylinder, the inner cylinder and the outer cylinder are made in the form of pipes rectangular or circular cross-section, the outer cylinder and the second supporting means are fixed on the wheelbase, the threaded spindle is fixed in bearings fixed accordingly Actually, on the outer and inner cylinders, on the handle of the wheelbase, there is a switch for raising and lowering the first supporting means, upper and lower limit switches located respectively in the upper and lower parts of the external cylinder, microcontroller, weight sensors, voltage sensor, current sensor, weight indicator , the indicator of the discharge of the battery, the indicator of the end of the leukofiltration process associated with the microcontroller, the voltage sensor is connected to the poles of the battery, the current sensor is connected between the first pole of the battery and the switch for raising and lowering the modes, the upper and lower limit switches are connected to the microcontroller, and the second supporting means is mounted on weight sensors mounted on a wheelbase, characterized in that it contains a heat-insulated chamber with a door, a thermal battery unit connected with the microcontroller, as well as the first and second temperature sensors located respectively in the zones of the first and second supporting devices associated with the microcontroller. 2. A device for leukofiltration of blood components according to claim 1, characterized in that the thermopile is made on Peltier semiconductor thermocouples.

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