Automatic injection system for blood flow detection

Abstract

The invention relates to an automatic injection system for blood flow detection, comprising: a pressure sensor configured to detect blood flow pressure; the injection device is configured to perform a pushing and injecting action; the control device is electrically connected with the pressure sensor and the injection device, and the control device is configured to control the injection device to stop the injection action when the pressure value detected by the pressure sensor is smaller than or equal to M, and the control device is configured to control the injection device to stop the injection action when the pressure value detected by the pressure sensor is smaller than or equal to M; or when the control device is configured to be that when the pressure value detected by the pressure sensor is larger than or equal to N, the control device controls the injection device to stop the injection action.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic injection system for blood flow detection. Background Art

[0002] Interventional therapy is a technique that uses minimal trauma to diagnose and treat diseases. It is usually guided by imaging (such as X-Ray, CT, US or MRI) to send a catheter to the target location in the body to achieve local diagnosis and treatment of the disease. During this period, some physiological parameters of the patient can be measured to determine the next step of interventional therapy. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a system capable of realizing automatic injection by detecting blood flow pressure.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A blood flow detection automatic injection system, comprising:

[0006] a pressure sensor configured to detect blood flow pressure;

[0007] an injection device configured to perform a push injection action;

[0008] A control device, the control device is electrically connected to the pressure sensor and the injection device respectively, and the control device is configured to: when the pressure value detected by the pressure sensor is less than or equal to M, the control device controls the injection device to stop the push injection action, or when the control device is configured to: when the pressure value detected by the pressure sensor is greater than or equal to N, the control device controls the injection device to stop the push injection action.

[0009] In some embodiments, the blood flow detection automatic injection system has a filling mode and a thrombolysis mode. When in the filling mode, the control device is configured to control the injection device to stop the pushing action when the pressure value detected by the pressure sensor is less than or equal to M. When in the thrombolysis mode, the control device is configured to control the injection device to stop the pushing action when the pressure value detected by the pressure sensor is greater than or equal to N.

[0010] In some embodiments, when in the filling mode and the pressure value detected by the pressure sensor is greater than M, the injection device is configured to control the injection time, injection rate and injection volume of the injection device according to the pressure value detected by the pressure sensor; when in the thrombolysis mode and the pressure value detected by the pressure sensor is less than N, the injection device is configured to control the injection time, injection rate and injection volume of the injection device according to the pressure value detected by the pressure sensor.

[0011] In some embodiments, the injection device includes a catheter, the pressure sensor is arranged on the catheter, and the pressure sensing device includes a PLA layer, a PVA layer, and a PET layer arranged in sequence from the outside to the inside.

[0012] In some embodiments, the PVA layer is a uniformly arranged tooth-like structure, and the tips of the tooth-like structures face the inside of the pressure sensor.

[0013] In some embodiments, the PET layer is a pressure receiving layer, and the tip of the tooth-like structure is in contact with the PET layer.

[0014] In some embodiments, the pressure sensing device further includes a circuit board disposed at the innermost side of the pressure sensor, and the circuit board is used to convert the pressure value into an electrical signal.

[0015] In some embodiments, the catheter is in the shape of a hollow cylinder, a receiving groove is provided on the catheter, the pressure sensor device is embedded in the receiving groove, and the pressure sensor is in the shape of an arc that arches outward.

[0016] In some embodiments, the injection device includes a syringe stand, a pusher, and a motor, wherein the syringe stand is used to stand the syringe, and the motor is used to control the pusher to push the syringe.

[0017] In some embodiments, the syringe holder is arranged in an arc-shaped concave shape, and the pusher is arranged behind the syringe holder.

[0018] In some embodiments, a fastener for fixing the syringe is disposed on the syringe rack, and the syringe is disposed between the syringe rack and the fastener.

[0019] In some embodiments, the injection device includes a screw structure, and the pusher is fixedly connected to a nut of the screw structure, or the pusher is integrally formed with the nut.

[0020] In some embodiments, the injection device comprises a Luer connector, a front end of the Luer connector is connected to the catheter, and a rear end of the Luer connector is connected to the syringe.

[0021] Due to the application of the above-mentioned technical scheme, the advantages of the present invention compared with the prior art are as follows: the blood flow detection automatic injection system of the present invention can be applied to interventional treatment, and the injection of the injection device can be directly controlled according to the blood flow pressure value to achieve precise regulation, and can be specifically applied to embolization treatment or thrombolysis treatment of rich vascular tumors, with rich usage scenarios and improved treatment effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of a blood flow detection automatic injection system according to an embodiment of the present invention Figure 1 ;

[0023] Figure 2 A three-dimensional schematic diagram of a blood flow detection automatic injection system according to an embodiment of the present invention Figure 2 ;

[0024] Figure 3 A top view of a blood flow detection automatic injection system according to an embodiment of the present invention without a syringe;

[0025] Figure 4 is a schematic diagram of a pressure sensor according to an embodiment of the present invention;

[0026] Figure Number:

[0027] 1-pressure sensor; 11-PLA layer; 12-PVA layer; 13-PET layer; 2-injection device; 21-injection seat; 22-catheter; 23-Luer connector; 24-syringe holder; 25-push part; 26-motor; 27-screw structure; 28-fastener; 3-syringe. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with embodiments. Figure 3 As shown, the lower direction in the figure is "left", the upper direction in the figure is "right", the right direction in the figure is "back", the left direction in the figure is "front", and the directions perpendicular to the viewing angle in the figure are "up" and "down". The definitions of the above directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1-4 As shown, the blood flow detection automatic injection system of the present invention includes a pressure sensor 1, an injection device 2 and a control device (not shown in the figure), wherein:

[0030] The injection device 2 is configured to perform a push injection action. In some embodiments, the injection device 2 includes an injection seat 21, a catheter 22, a Luer connector 23, a syringe holder 24, a pusher 25, a motor 26, and a screw structure 27. The catheter 22 is a hollow cylindrical shape and can be used to be inserted into the body of the patient to conduct the injection solution. The catheter 22 is arranged outside the injection seat 21, and the Luer connector 23, the syringe holder 24, the pusher 25, the motor 26, and the screw structure 27 are all arranged inside the injection seat 21. The rear end of the catheter 22 is connected to the front end of the Luer connector 23, and the rear end of the Luer connector 23 is connected to the syringe 3. The syringe holder 24 is arranged in an arc-shaped concave shape for mounting the syringe 3. The syringe holder 24 is provided with a fastener 28 for fixing the syringe 3. The syringe 3 is arranged between the syringe holder 24 and the fastener 28. In one embodiment, the fastener 28 is connected to the syringe holder 24 by a screw. The push piece 25 is arranged behind the syringe holder 24, and the motor 26 is arranged behind the push piece 25. The motor 26 is used to control the push piece 25 to push the syringe 3. In one embodiment, the push piece 25 is fixedly connected to the nut of the screw structure 27, or in other embodiments, the push piece 25 and the nut are integrally formed.

[0031] The pressure sensor 1 is configured to detect blood flow pressure. In some embodiments, a receiving groove is provided on the catheter 22, and the pressure sensing device 1 is embedded in the receiving groove. The pressure sensor 1 is in an arc shape that arches outward, that is, from the appearance, the pressure sensor does not protrude from the catheter 22, so that when the catheter 22 is placed in the body of the patient, the surrounding tissue will not be damaged by the pressure sensor 1. The pressure sensing device 1 includes a PLA layer 11, a PVA layer 12, a PET layer 13 and a circuit board (not shown in the figure) arranged in sequence from the outside to the inside. The PLA layer has good biocompatibility, bioabsorbability, and antibacterial properties, and is suitable for direct contact with the body of the patient. Specifically, it is in an arc shape. The PVA layer 12 has an arc-shaped base layer and a uniformly arranged tooth structure. The tip of the tooth structure faces the inside of the pressure sensor, which can amplify the pressure generated by the blood flow. The PET layer 13 is a pressure receiving layer. The tip of the tooth structure contacts the PET layer 13, so that the generated pressure is more uniform. The circuit board is made by screen printing technology and is used to convert the pressure value into an electrical signal.

[0032] The control device is electrically connected to the pressure sensor 1 and the injection device 2 respectively, and the control device is configured as follows: when the pressure value detected by the pressure sensor 1 is less than or equal to M, the control device controls the injection device 2 to stop the push injection action, or when the control device is configured as follows: when the pressure value detected by the pressure sensor 1 is greater than or equal to N, the control device controls the injection device 2 to stop the push injection action.

[0033] In some embodiments, the blood flow detection automatic injection system has a filling mode and a thrombolysis mode. The filling mode of the present invention can be applied to the treatment of hypervascular tumors. By injecting embolic agents into the blood vessels of the patient, tumor necrosis is achieved to achieve a therapeutic effect. The thrombolysis mode of the present invention can be applied to thrombolytic therapy. By injecting thrombolytic agents into the blood vessels of the patient, a thrombolytic therapeutic effect is achieved. When the catheter 22 enters the blood, the pressure generated by the blood flow will be converted into an electrical signal output by the pressure sensor 1. When the blood flow changes, the electrical signal will also change. This signal change can control the blood flow detection automatic injection system to automatically inject again, and form a good automatic cycle.

[0034] Specifically, when in the filling mode, the control device is configured to control the injection device 2 to stop the push injection action when the pressure value detected by the pressure sensor 1 is less than or equal to M, and when the pressure value detected by the pressure sensor 1 is greater than M, the injection device 2 is configured to control the injection time, injection rate and injection volume of the injection device 2 according to the pressure value detected by the pressure sensor 1, such as when the detected pressure value is much greater than M, increase the injection time, injection rate and injection volume, and when the detected pressure value is greater than but close to M, reduce the injection time, injection rate and injection volume; when in the thrombolytic mode, the control device is The control device is configured to control the injection device 2 to stop the push injection action when the pressure value detected by the pressure sensor 1 is greater than or equal to N. When the pressure value detected by the pressure sensor 1 is less than N, the injection device 2 is configured to control the injection time, injection rate and injection volume of the injection device 2 according to the pressure value detected by the pressure sensor 1. For example, when the detected pressure value is much less than N, the injection time, injection rate and injection volume are increased. When the detected pressure value is less than but close to N, the injection time, injection rate and injection volume are reduced. The specific pressure value and injection time, injection rate and injection volume can be preset in the control device.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A blood flow detection automatic injection system, characterized in that: include: a pressure sensor configured to detect blood flow pressure; an injection device configured to perform a push injection action; A control device, the control device is electrically connected to the pressure sensor and the injection device respectively, and the control device is configured to: when the pressure value detected by the pressure sensor is less than or equal to M, the control device controls the injection device to stop the push injection action, or when the control device is configured to: when the pressure value detected by the pressure sensor is greater than or equal to N, the control device controls the injection device to stop the push injection action.

2. The blood flow detection automatic injection system according to claim 1, characterized in that: The blood flow detection automatic push injection system has a filling mode and a thrombolysis mode. When in the filling mode, the control device is configured to control the injection device to stop the push injection action when the pressure value detected by the pressure sensor is less than or equal to M. When in the thrombolysis mode, the control device is configured to control the injection device to stop the push injection action when the pressure value detected by the pressure sensor is greater than or equal to N.

3. The blood flow detection automatic injection system according to claim 2, characterized in that: When in the filling mode and the pressure value detected by the pressure sensor is greater than M, the injection device is configured to control the injection time, injection rate and injection volume of the injection device according to the pressure value detected by the pressure sensor. When in the thrombolysis mode and the pressure value detected by the pressure sensor is less than N, the injection device is configured to control the injection time, injection rate and injection volume of the injection device according to the pressure value detected by the pressure sensor.

4. The blood flow detection automatic injection system according to claim 1, characterized in that: The injection device comprises a catheter, the pressure sensor is arranged on the catheter, and the pressure sensing device comprises a PLA layer, a PVA layer, and a PET layer which are arranged in sequence from the outside to the inside.

5. The blood flow detection automatic injection system according to claim 4, characterized in that: The PVA layer has uniformly arranged tooth-like structures, and the tips of the tooth-like structures face the inner side of the pressure sensor.

6. The blood flow detection automatic injection system according to claim 5, characterized in that: The PET layer is a pressure receiving layer, and the tip of the tooth-like structure is in contact with the PET layer.

7. The blood flow detection automatic injection system according to claim 4, characterized in that: The pressure sensing device further comprises a circuit board arranged at the innermost side of the pressure sensor, and the circuit board is used for converting the pressure value into an electrical signal.

8. The blood flow detection automatic injection system according to claim 4, characterized in that: The conduit is in the shape of a hollow cylinder. A receiving groove is provided on the conduit. The pressure sensor device is embedded in the receiving groove. The pressure sensor is in the shape of an arc that arches outwards.

9. The blood flow detection automatic injection system according to claim 4, characterized in that: The injection device comprises a syringe rack, a pusher, and a motor. The syringe rack is used to mount the syringe, and the motor is used to control the pusher to push the syringe.

10. The blood flow detection automatic injection system according to claim 9, characterized in that: The syringe rack is arranged in an arc-shaped concave shape, and the pusher is arranged behind the syringe rack.

11. The blood flow detection automatic injection system according to claim 10, characterized in that: The syringe rack is provided with a fastener for fixing the syringe, and the syringe is arranged between the syringe rack and the fastener.

12. The blood flow detection automatic injection system according to claim 9, characterized in that: The injection device comprises a screw structure, and the pusher is fixedly connected to a nut of the screw structure, or the pusher is integrally formed with the nut.

13. The blood flow detection automatic injection system according to claim 9, characterized in that: The injection device comprises a Luer connector, a front end portion of the Luer connector is connected to the catheter, and a rear end portion of the Luer connector is connected to the syringe.

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