RU2509550C2 - Transportation stand for leukofiltration of blood and its components - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medicine, and may be used at blood transfusion stations. A transportation stand for leukofiltration of blood and its components through filters comprises a wheelbase with a handle, a first carrier for lifting and lowering blood and component containers, a second carrier for receiving containers, and a drive unit for lifting and lowering the first carrier. The drive unit is presented by a reverse reduction motor connected through an elastic coupling to an actuator screw driving forward a slide nut and a coupled inner cylinder with the first carrier attached in relation to an outer cylinder. The outer cylinder and second carrier are fixed on the wheelbase; the actuator screw is fixed in bearings attached to the outer and inner cylinders. The wheelbase handle comprises a lifting and lowering function switch of the first carrier coupled with the reverse reduction motor, a first pole of a battery, upper and lower terminal switch, while the above switches are connected with the second pole of the battery.

EFFECT: invention provides simplifying the transportation stand design for leukofiltration of blood and its components and providing the ease of maintenance.

2 cl, 3 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 surgical and resuscitation departments of hospitals and clinics, as well as in medical research institutions.

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 fastening elements of containers, 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 A clamping ring is inserted, an intermediate sleeve is pressed in the upper part of the movable section, in the upper part of which a groove is made, into which a split ring is inserted and a rotary section is put on, on which container fastening elements are mounted.

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.

The closest stand is a 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 wheeled a 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, d for raising or lowering the 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 disadvantage of this rack is the design complexity and inconvenience of the maintenance of hydraulic or pneumatic cylinders, in particular, associated with the need to replace or refuel compressed gas cylinders used in the pneumatic drive system.

The technical result to which the invention is directed is to eliminate this drawback, create a simpler design and increase the convenience of maintenance.

The specified technical result is achieved in that in a mobile stand for leukofiltration of blood or its components in containers under the action of gravity by means of tubular lines through the 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 raising or lowering blood containers or blood components, and second support means in the form of pallets for receiving containers, a drive for lifting or lowering the first supporting means, 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 to 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 mounted on a wheelbase with a handle, chassis the screw is 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 associated with a reversible geared motor, the first pole of the battery, the upper and lower limit switches, the upper and lower limit switches are connected with the second pole of the battery.

The specified technical result is also achieved by the fact that in a mobile stand for leukofiltration of blood or its components in containers under the action of gravity by means of tubular lines through the appropriate filters into the respective receiving containers, the inner cylinder moves along the outer cylinder along a guide fixed to the outer cylinder.

The figure 1 shows a schematic diagram of a mobile rack for leukofiltration of blood or its components.

The figure 2 shows the connection diagram of the containers.

The figure 3 shows a circuit diagram.

The figures show:

1. Wheelbase with a handle.

2. The first supporting tool.

3. The second supporting tool.

4. Reversible gear motor.

5. Flexible coupling.

6. Lead screw.

7. Running nut.

8. The inner cylinder.

9. The outer cylinder.

10. Bearing mounted on an outer cylinder.

11. Bearing mounted on the inner cylinder.

12. The mode switch.

13. The battery.

14. The upper limit switch.

15. Lower limit switch.

16. The guide.

17. Container with filtered blood or its components.

18. Tubular highway.

19. The filter.

20. Tubular line of the receiving container.

21. The receiving container.

The work of a mobile stand for leukofiltration of blood or its components is as follows.

The first supporting means 2 (Fig. 1), mounted on the inner cylinder 8, is moved vertically (up, down) along the outer cylinder 9 to a height convenient for securing containers with filtered blood or its components, by means of a reversible gear motor 4, feeding it the voltage of the required polarity with the switch of the modes of raising and lowering 12. In this case, the inner cylinder 8 together with the first supporting means 2 are moved by means of a driving nut 7, rigidly connected with the inner cylinder indrome 8. The lead nut 7 moves along the lead screw 6. One of the ends of the lead screw 6 is fixed in the bearing 10 so that the lead screw 6 can rotate freely around its axis and cannot move along the outer cylinder. The second end of the lead screw 6 is fixed in the bearing 11 so that the inner cylinder 8 moves freely along the lead screw 6, maintaining alignment with the lead screw 6 and the outer cylinder 9. To prevent rotation of the inner cylinder 8 relative to the outer cylinder 9, they are made in the form of rectangular pipes sections. In the case when the inner cylinder 8 and the outer cylinder 9 are made in the form of pipes of circular cross section, to prevent their rotation relative to each other, a guide 16 is provided, mounted on the inner surface of the outer cylinder 9 parallel to its axis. When the lead screw 6 is rotated, the lead nut 7 is brought into linear motion by it, which ensures the forward movement of the inner cylinder 8 with the supporting means 2 fixed relative to the outer cylinder 9. The lead screw 6 is rotated by a reversible geared motor 4 by means of an elastic coupling 5. For rotation in the right direction of the lead screw 6 on the reversing gear motor 4 is supplied with the voltage of the required polarity by means of the switch modes of raising and lowering 12. Flexible coupling 5 s uzhit to compensate for lack of concentricity of the motor shaft reversing gear 4 and the screw shaft 6, and also to prevent jamming of the lead nut 7 in its lowest and uppermost positions. The moment of rotation transmitted by the flexible coupling 5 is less than the tightening torque of the spindle nut 7 on the spindle 6, which allows the flexible coupling 5 to deform and prevent breakage of the reversing gear motor 4 in emergency situations. To prevent jamming of the driving nut 7 are also the upper and lower limit switches 14 and 15, which limit its progress. The upper and lower limit switches 14 and 15 open the power circuit of the reversing gear motor 4 when the travel nut approaches the bearing 10 or 11.

After the first support means 2 is installed at the required height, containers with filtered blood or its components 17 (FIG. 2) are placed on it, pre-connected to the receiving containers 21 through filters 19 by means of tubular lines 18 and 20 in a “clean room”. The receiving containers 21 are placed on the second supporting means 3. To ensure maximum filtering speed, the first supporting means 2 is moved to the highest possible position. In this case, the tubular lines 18 and 20 should be straightened, and the receiving containers 21 should be located on the second supporting means 3 and not hang on the tubular lines 20.

During the filtration process, blood or its components flow from containers 17 located on the first supporting means 2, into containers 21 located on the second supporting means 3, along the lines 18 and 20 through the filters 19 under the action of their own gravity. The filtration process ends when the blood or its components completely flow into the receiving containers 21 located on the second support means 3. The end of the filtration process is visually controlled.

The switch modes of raising and lowering the first supporting means 12 is a dual three-position electric switch (figure 3). The switch is connected to a reversible gear motor, the first pole of the battery, the upper and lower limit switches, 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 13 is supplied to the switch of the modes of raising and lowering 12 through the upper and lower limit switches 14 and 15 so that in the first position of the switch to the reversing gear motor 4, voltage of direct polarity is applied, in the second position of the switch to the reversing gear motor 4 voltage is not supplied; in the third position of the switch, a reverse polarity voltage is supplied to the reversible gear motor 4; When translating the switch modes of raising and lowering 12 in the first and second positions, the motor rotates in different directions. The voltage is supplied to the switch of the modes of raising and lowering 12 when the travel nut 7 is between the extreme upper and extreme lower positions. When the travel nut 7 is in the highest position, the upper limit switch 14 opens the power supply circuit of the reversible gear motor 4, when the travel nut 7 is in the extreme lower position, the lower limit switch 15 opens the power supply circuit of the reversible gear motor 4. The reversible gear motor 4 is stopped, preventing jamming of the travel nut 7.

After the filtration process is over, air is removed from the containers 21 with filtered blood or its components, the containers 21 are sealed, disconnected from the lines 20 and removed from the second support means 3. By means of the mode switch for raising and lowering 13, the first support means 2 is set to a convenient height for work, empty containers 17 with lines 18, 20 and filters 19 are removed from the first support means 2 and disposed of.

The use of a reversible gear 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 a mobile stand for leukofiltration or its components and increases the convenience of maintenance.

Claims (2)

1. A mobile stand for leukofiltration of blood or its components in containers under the influence 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 blood containers or its components, and a second supporting means in the form of pallets for receiving containers, a drive for raising or lowering the first supporting means, characterized in that 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 on it relative to the outer cylinder, the inner 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 a wheelbase with a handle, the lead 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 associated with a reversible geared motor, the first pole of the battery, the upper and lower limit switches, the upper and lower limit switches are connected with the second pole of the battery batteries. 2. The mobile stand according to claim 1, characterized in that the inner cylinder moves along the outer cylinder along a guide fixed to the outer cylinder.

Images