Closed blood sampling device of ECMO system

Abstract

The utility model relates to the technical field of medical equipment, in particular to an ECMO system closed blood sampling device which comprises a membrane lung, a pressurizing instrument and a servo motor, a closed blood sampling tube is detachably connected to the membrane lung, an extrusion seat is detachably connected to the closed blood sampling tube, a blood sampling opening is formed in the closed blood sampling tube, and the pressurizing instrument is connected with the servo motor. A volume meter is arranged on the closed blood collection tube on one side of the blood collection opening, a dropper and a switch are arranged on the closed blood collection tube between the volume meter and the pressurization instrument, and a pressing wheel is arranged in the extrusion seat in a telescopic mode. The servo motor can control stretching and retracting of the transverse plate, the transverse plate is provided with the top seat, the top seat is provided with the pressing wheel, the top seat and the pressing wheel can move along with stretching and retracting of the transverse plate, and the pressing wheel can be close to or away from the closed blood collection tube, so that the closed blood collection tube is extruded, and the pressure intensity of the closed blood collection tube can be balanced; therefore, the situation that the pressure intensity in the tube cannot reach a calibration value immediately during pressurization is prevented, and the closed blood sampling can be more reliable and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a closed blood sampling device for an ECMO system. Background Technique

[0002] The extracorporeal membrane oxygenation system, commonly known as the "artificial lung", is mainly used to provide long-term extracorporeal cardiopulmonary support for patients with cardiopulmonary failure, assist breathing and blood circulation to maintain the life of the patient, and win precious time for the rescue of critically ill patients. The most core components of the ECMO system are the membrane lung and the blood pump, which play the roles of replacing the lung and the heart respectively. The core parts of the extracorporeal membrane oxygenation are the membrane lung and the blood pump, which can provide long-term cardiopulmonary support for patients with severe cardiopulmonary failure and win precious time for the rescue of critically ill patients.

[0003] At present, the conventional blood sampling method is to perform open blood sampling from the connecting pipes before and after the membrane lung. This blood sampling method has the problem of high risk of blood-borne exposure. The blood in the ECMO circulation pipeline is directly connected to the outside world. If the aseptic operation is not strict, the risk of blood source infection is extremely high. Content of the Utility Model

[0004] The purpose of the utility model is to provide a closed blood sampling device for an ECMO system to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A closed blood sampling device for an ECMO system, including a membrane lung, a pressurizer and a servo motor. A closed blood sampling tube is detachably connected to the membrane lung. An extrusion seat is detachably connected to the closed blood sampling tube. A blood sampling port is provided on the closed blood sampling tube. A volumeter is provided on the closed blood sampling tube on one side of the blood sampling port. A dropper and a switch are arranged on the closed blood sampling tube between the volumeter and the pressurizer. A pressing wheel is telescopically arranged inside the extrusion seat.

[0006] Preferably, an inner cavity is opened inside the extrusion seat, a placement groove is arranged inside the inner cavity, and the closed blood sampling tube is clamped in the placement groove of the inner cavity.

[0007] Preferably, side plates are arranged inside the inner cavity of the extrusion seat. The side plates are vertically arranged inside the inner cavity of the extrusion seat and are respectively located on both sides of the closed blood sampling tube.

[0008] Preferably, a cross plate is arranged on the side plate inside the inner cavity. The cross plate and the side plate are arranged in a cross shape as a whole, and a sliding opening is opened on the cross plate.

[0009] Preferably, the sliding opening of the cross plate is sleeved on the corresponding side plate. A connecting seat is arranged on the cross plate, and a screw rod is threadedly connected to the connecting seat. The screw rod is arranged on the servo motor.

[0010] Preferably, a top seat is provided on the other end face of the cross plate, a pressure wheel is provided at the output end of the top seat, and the length of the pressure wheel is greater than the diameter of the airtight blood collection tube.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] By providing an airtight blood collection tube on the membrane lung, the airtight blood collection tube is safer and more reliable than the traditional open type, which can reduce the probability of blood infection and thus avoid secondary harm to patients. To achieve airtight blood collection, a pressure applicator is provided at the input end of the airtight blood collection tube. The pressure applicator can apply pressure to the airtight blood collection tube, and the pressure inside the airtight blood collection tube can be adjusted according to the usage situation. An extrusion seat is provided on the airtight blood collection tube, and the pressure wheel inside the extrusion seat can reciprocally press the airtight blood collection tube, so as to realize the extrusion of the airtight blood collection tube when the pressure applicator is started, so that the pressure of the airtight blood collection tube can be balanced, thereby preventing the pressure inside the tube from not immediately reaching the calibration value during pressurization, and making the airtight blood collection more reliable and safe.

[0013] By providing an inner cavity inside the extrusion seat, a placement groove is provided inside the inner cavity, and the airtight blood collection tube can be placed in the placement groove. The placement groove is semicircularly arranged, and the airtight blood collection tube can be exposed inside the inner cavity. Side plates are provided inside the inner cavity and are located on both sides of the airtight blood collection tube respectively. Then a cross plate is provided between the side plates, and a sliding opening is formed on the cross plate. The side plates can be inserted into the sliding opening, and the cross plate will not shift under the restriction of the side plates. A connecting seat is provided on the cross plate, and the connecting seat is threadedly connected to the screw rod on the servo motor. The servo motor can control the telescoping of the cross plate. A top seat is provided on the cross plate, and a pressure wheel is provided on the top seat. The top seat and the pressure wheel can move along with the telescoping of the cross plate, and the pressure wheel can approach or move away from the airtight blood collection tube, so as to realize the extrusion of the airtight blood collection tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the overall structure of the present utility model Figure 1 ;

[0015] Figure 2 Schematic diagram of the overall structure of the present utility model Figure 2 ;

[0016] Figure 3 Schematic connection diagram of the servo motor in the present utility model;

[0017] Figure 4 Enlarged schematic diagram of area A in the present utility model;

[0018] In the figure: 1. Membrane lung; 2. Pressurizer; 3. Extrusion seat; 4. Sealed blood collection tube; 5. Drip tube; 6. Switch; 7. Inner cavity; 8. Volumeter; 9. Blood collection port; 10. Placement groove; 11. Servo motor; 12. Side plate; 13. Slide opening; 14. Cross plate; 15. Screw; 16. Connection seat; 17. Top seat; 18. Pressure wheel. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 4 , the present invention provides a technical solution: a closed blood collection device for an ECMO system, including a membrane lung 1, a pressurizer 2 and a servo motor 11. A sealed blood collection tube 4 is detachably connected to the membrane lung 1, an extrusion seat 3 is detachably connected to the sealed blood collection tube 4, a blood collection port 9 is provided on the sealed blood collection tube 4, a volumeter 8 is provided on the sealed blood collection tube 4 on one side of the blood collection port 9, a drip tube 5 and a switch 6 are arranged on the sealed blood collection tube 4 between the volumeter 8 and the pressurizer 2, and a pressure wheel 18 is telescopically arranged inside the extrusion seat 3.

[0021] To achieve closed blood collection, a pressurizer 2 is provided at the input end of the sealed blood collection tube 4. The pressurizer 2 can apply pressure to the inside of the sealed blood collection tube 4, and the pressure inside the sealed blood collection tube 4 can be adjusted according to the usage situation. An extrusion seat 3 is provided on the sealed blood collection tube 4, and the pressure wheel 18 inside the extrusion seat 3 can reciprocally press the sealed blood collection tube 4, so as to realize the extrusion of the sealed blood collection tube 4 when the pressurizer 2 is started. Side plates 12 are arranged inside the inner cavity 7, and the side plates 12 are respectively located on both sides of the sealed blood collection tube 4. Then a cross plate 14 is arranged between the side plates 12, and a slide opening 13 is formed on the cross plate 14. The side plates 12 can be inserted into the slide opening 13, and the cross plate 14 will not shift under the restriction of the side plates 12. A connection seat 16 is arranged on the cross plate 14, and the connection seat 16 is in threaded connection with the screw 15 on the servo motor 11. The servo motor 11 can control the telescopic movement of the cross plate 14. A top seat 17 is arranged on the cross plate 14, and a pressure wheel 18 is arranged on the top seat 17. The top seat 17 and the pressure wheel 18 can move along with the telescopic movement of the cross plate 14, and the pressure wheel 18 can approach or move away from the sealed blood collection tube 4, so as to realize the extrusion of the sealed blood collection tube 4, so that the pressure of the sealed blood collection tube 4 can be balanced, thereby preventing the pressure in the tube from not reaching the calibration value immediately during pressurization, and making the closed blood collection more reliable and safe.

[0022] The extrusion seat 3 is provided with an inner cavity 7 inside. A placement groove 10 is arranged inside the inner cavity 7, and a sealed blood collection tube 4 is clamped in the placement groove 10 of the inner cavity 7. By arranging the placement groove 10 inside the inner cavity 7, the sealed blood collection tube 4 can be installed in the placement groove 10. The sealed blood collection tube 4 can be limited by the placement groove 10, and the position of the extrusion seat 3 on the sealed blood collection tube 4 will not change easily. The placement groove 10 can also prevent the position of the sealed blood collection tube 4 from shifting, so as to ensure that the pressing wheel 18 can accurately press the sealed blood collection tube 4.

[0023] Side plates 12 are arranged inside the inner cavity 7 of the extrusion seat 3. The side plates 12 are vertically arranged inside the inner cavity 7 of the extrusion seat 3 and are located on both sides of the sealed blood collection tube 4 respectively. By arranging the side plates 12 inside the inner cavity 7, the side plates 12 can limit the cross plate 14. By arranging the side plates 12 on both sides of the sealed blood collection tube 4, the cross plate 14 can correspond to the position of the sealed blood collection tube 4, and the cross plate 14 can move towards the position of the sealed blood collection tube 4, so as to ensure that the cross plate 14 can drive the pressing wheel 18 to move towards the position of the sealed blood collection tube 4.

[0024] A cross plate 14 is arranged on the side plate 12 inside the inner cavity 7. The cross plate 14 and the side plate 12 are arranged in a cross shape as a whole, and a sliding opening 13 is arranged on the cross plate 14. By arranging the sliding opening 13 on the cross plate 14 and connecting the sliding opening 13 with the side plate 12, the side plate 12 can limit the cross plate 14, and the position of the cross plate 14 will not change, so as to accurately move towards the position of the sealed blood collection tube 4. By arranging the sliding opening 13, the movement between the side plate 12 and the cross plate 14 will not hinder each other.

[0025] The sliding opening 13 of the cross plate 14 is sleeved on the corresponding side plate 12. A connecting seat 16 is arranged on the cross plate 14, and a screw rod 15 is threadedly connected to the connecting seat 16. The screw rod 15 is arranged on the servo motor 11. By arranging the servo motor 11, the screw rod 15 can be controlled. The screw rod 15 is threadedly connected to the connecting seat 16. When the servo motor 11 drives the screw rod 15 to rotate, the connecting seat 16 can move along the screw rod 15. When the connecting seat 16 moves, it can drive the cross plate 14 to move, and the cross plate 14 can move along the side plate 12.

[0026] A top seat 17 is arranged on the other end face of the cross plate 14. The output end of the top seat 17 is provided with a pressing wheel 18, and the length of the pressing wheel 18 is greater than the diameter of the sealed blood collection tube 4. When the cross plate 14 moves along the side plate 12, it can drive the top seat 17 to move. The top seat 17 can drive the pressing wheel 18 to move towards the position of the sealed blood collection tube 4, and the pressing wheel 18 can approach the sealed blood collection tube 4, so as to press the sealed blood collection tube 4. After the sealed blood collection tube 4 is pressed, the internal pressure will also change, so that the pressure inside the sealed blood collection tube 4 can be quickly balanced, making the equipment safer and more reliable.

[0027] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A closed blood sampling device for an ECMO system, comprising a membrane lung (1), a pressurizing device (2) and a servo motor (11), characterized in that: The membrane lung (1) is detachably connected to a sealed blood collection tube (4), and the sealed blood collection tube (4) is detachably connected to a pressing seat (3). The sealed blood collection tube (4) is provided with a blood collection port (9), and a volume meter (8) is provided on the sealed blood collection tube (4) on one side of the blood collection port (9). A dropper (5) and a switch (6) are provided on the sealed blood collection tube (4) between the volume meter (8) and the pressurizing device (2), and a retractable pressing wheel (18) is provided inside the pressing seat (3).

2. The closed blood sampling device for the ECMO system according to claim 1, characterized in that: An inner cavity (7) is provided in the extrusion seat (3), a placement groove (10) is provided inside the inner cavity (7), and a sealed blood collection tube (4) is clamped in the placement groove (10) of the inner cavity (7).

3. The closed blood sampling device for the ECMO system according to claim 2, characterized in that: A side plate (12) is arranged inside the inner cavity (7) of the extrusion seat (3). The side plate (12) is vertically arranged in the inner cavity (7) of the extrusion seat (3). The side plates (12) are respectively located on both sides of the sealed blood collection tube (4).

4. The closed blood sampling device for the ECMO system according to claim 3, characterized in that: A transverse plate (14) is arranged on the side plate (12) inside the inner cavity (7); the transverse plate (14) and the side plate (12) are arranged in a cross shape as a whole; and a sliding opening (13) is opened on the transverse plate (14).

5. The closed blood sampling device for the ECMO system according to claim 4, characterized in that: The sliding opening (13) of the transverse plate (14) is sleeved on the corresponding side plate (12); a connecting seat (16) is provided on the transverse plate (14); a screw rod (15) is threadedly connected to the connecting seat (16); and the screw rod (15) is provided on the servo motor (11).

6. The closed blood sampling device for the ECMO system according to claim 5, characterized in that: A top seat (17) is arranged on the other end surface of the transverse plate (14), and a pressing wheel (18) is arranged at the output end of the top seat (17), wherein the length of the pressing wheel (18) is greater than the diameter of the sealed blood collection tube (4).

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