RU2623078C1 - Autonomous mobile stand for leukofiltration of blood components - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine and can be applied in blood transfusion. Autonomous mobile stand for leukofiltration of blood components contains wheeled base with handle, first supporting means for lifting or lowering containers with blood or its components, second supporting means for receiving containers, drive for lifting or lowering first supporting means, microcontroller, as well as weight sensors, voltage sensor, current sensor, weight indicator, indicator of accumulator battery discharge and indicator of leukofiltration process termination, connected with microcontroller. On the handle of wheeled base switch of modes of lifting and lowering of first supporting means is located. Voltage sensor is connected to poles of accumulator battery current sensor is connected between first pole of accumulator battery and switch of lifting and lowering modes, upper and lower terminal switches are connected with microcontroller, and second supporting means is fastened on weight sensors, installed on the wheeled base.

EFFECT: invention ensures automated control of termination of process of leukofiltering of blood components and degree of accumulator battery charge, as well as makes it possible to increase efficiency of personnel work and convenience of technical service of stand in the process of leukofiltering of blood components.

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Description

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

A well-known rack for containers with infusion solutions (see RU 33008, U1, class A61J 1/05, 10/10/2003), containing a base with a support in the form of a pipe, a clamping unit with a locking element, a movable section and container fastening elements, in which the clamping unit is made in the form of a stepped sleeve connecting the support and the movable section, on the lower part of which the first guide sleeve is installed, the second guide sleeve is fixed inside the lower part of the clamping unit, in the middle part of which it is installed between the fixing element and the movable section but the clamping ring in the upper part of the movable section is pressed into the intermediate sleeve, the top of which is formed a groove into which is inserted a split ring and wearing rotary section, on which the fastening elements of containers.

A disadvantage of the known rack for containers with infusion solutions is the inability to quickly adjust the height of the containers with blood or its components.

Known mobile stand 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 wheel base 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 accommodating receiving containers, a 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.

The closest self-contained mobile stand is a stand (see RU 2509550, C2, class A61J 1/14, 03/20/2014) for 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 wheel base 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 raising 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, which translates the driving nut and the inner cylinder connected thereto with the first supporting means fixed to it relative to the outer cylinder, inner the cylinder and the outer cylinder are 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 base, the screw is fixed in bearings mounted respectively on the outer and inner cylinders, on the handle of the wheel base 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 outer cylinder.

The disadvantages of the device are the need for continuous visual monitoring of the leukofiltration process in order to fix the moment of its completion, which reduces staff productivity, as well as the lack of control of the degree of charge and the health of the battery, which can lead to failure of the lifting function of the containers and the inability to conduct the leukofiltration of blood components.

The technical result to which the invention is directed is to eliminate these drawbacks, to create an automated system for monitoring the end of the process of leukofiltration of blood components and the degree of charge and serviceability of the battery, to increase staff productivity and ease of maintenance of the rack during leukofiltration of blood components.

The specified technical result is achieved in that an autonomous mobile stand for leukofiltration of blood components in containers under the action of gravity by means of tubular lines through appropriate filters into appropriate receiving containers, containing a wheelbase with a handle, the first supporting means in the form of a frame with hooks, adapted for lifting or lowering containers with blood components, and a second support means in the form of a tray for receiving containers, a drive for lifting whether 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, which translates the driving nut and the 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 to the wheels base, the 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, the upper and lower limit switches, located respectively in the upper and lower parts of the outer cylinder, contain a microcontroller, weight sensors, voltage sensor, current sensor, weight indicator, battery discharge indicator, end of leukofiltration process associated with microcontrol ohm, a voltage sensor connected to the battery poles, the current sensor is connected between the first pole of the battery and mode switch lifting and lowering the upper and lower limit switches are connected to the microcontroller, and the second supporting means fixed to the weight sensors mounted on the wheel base.

The figure shows a schematic diagram of an autonomous mobile rack for leukofiltration of blood components.

The figure 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. Spindle

13. Running nut

14. The inner cylinder

15. The outer cylinder

16. Bearings

17. The switch of the modes of raising and lowering

18. 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 low indicator

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

The work of an autonomous mobile rack for leukofiltration of blood components is as follows.

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. For rotation in the desired direction 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 the failure of the motor 9 when the first supporting means 7 is overloaded, an electric current sensor 23 is provided. When the value of 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 a predetermined 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.

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, which can be made in the form of a digital segment indicator or graphic display. 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 sound indicator. 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 of the modes of raising and lowering 17 so that in the first position of the switch to the reversing gear motor 9, the voltage of direct polarity is applied, 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 running 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 running nut 13 is in its lowermost position, the lower limit switch 19 opens the power supply circuit of the reversible gear motor 9. The reversing gear motor 9 is stopped, preventing jamming of the travel nut 13.

After the end of the leukofiltration process, air is removed from the containers with filtered blood components 4, the containers 4 are sealed, disconnected from the highways 2 and removed from the second support means 8. Using the switch for raising and lowering 17, the first support means 7 is set to a convenient height for work, empty containers 1 with lines 2 and filters 3 is removed from the first supporting means 7 and disposed of.

All nodes of an autonomous mobile rack 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 use of a reversible reduction electric motor as a drive powered by a built-in rechargeable battery, which is charged from an industrial frequency alternating current network, significantly simplifies the design of an autonomous mobile stand for leukofiltration of blood components and increases the convenience of maintenance. The invention allows to create an automated system for monitoring the end of the process of leukofiltration of blood components and the degree of charge of the battery, to increase staff productivity and ease of maintenance of the rack during leukofiltration of blood components.

Claims (1)

An autonomous mobile stand for leukofiltration of blood components in containers under the action of gravity by means of tubular lines through appropriate filters to appropriate receiving containers, comprising 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 supporting means in the form of a pallet for receiving containers, a drive for raising or lowering the first supporting means, battery a 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 drive 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 are made in the form pipes of rectangular or circular cross section, the outer cylinder and the second supporting means are fixed on the wheel base, the spindle is fixed in the bearings, closed prisoners 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, upper and lower limit switches located respectively in the upper and lower parts of the outer cylinder, characterized in that it 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, voltage sensor 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 mounted on a wheel base.

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