Closed drainage puncture needle for thoracic cavity

Abstract

The invention relates to the technical field of medical instruments, in particular to a thoracic cavity closed drainage puncture needle. The device comprises an abutting assembly, a puncturing assembly and a pair of limiting assemblies. The abutting assembly comprises an abutting ring arranged on the skin of a patient in an abutting mode, a pasting ring arranged on the lower surface of the abutting ring in a surrounding and covering mode and a mounting ring fixedly arranged in the abutting ring. The puncture assembly comprises an outer needle body arranged in the mounting ring in a sliding and sleeved mode, an inner needle core movably arranged in the outer needle body in a sleeved mode and a control handle arranged at the lower end of the inner needle core. Each limiting assembly comprises a clamping plate arranged on one side in the corresponding mounting ring in a sliding mode, a reset spring arranged between the clamping plate and the mounting ring on the corresponding side and limiting protrusions evenly distributed on the inner side face of the clamping plate at intervals in the height direction of the clamping plate. And a plurality of limiting grooves matched and fixed with the limiting bulges are formed in the outer side wall of the outer needle body at intervals along the height direction. The device solves the problem that the puncture needle is easy to move left and right or back and forth in the withdrawing process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a closed thoracic drainage puncture needle. Background Technology

[0002] Closed chest drainage is used to drain effusion or gas from the pleural cavity, usually achieved by inserting a drainage tube into the chest cavity. It is commonly used to treat conditions such as pneumothorax, hemothorax, and pleural effusion. Currently, emergency backpacks are equipped with closed chest drainage devices, but these devices suffer from problems such as high operational difficulty, low hygiene and safety, difficulty in drainage, and low efficiency.

[0003] The existing puncture needles require slight negative pressure to be inserted into the pleural cavity before use; however, the following problems may occur during actual operation.

[0004] 1. When using a puncture needle to perform thoracentesis on a patient's chest cavity, it is necessary to aspirate after the needle tip has entered the chest cavity to determine whether the puncture needle has penetrated into the chest cavity. However, during the aspiration process, the position of the puncture needle cannot be fixed, and the puncture needle may move left and right or back and forth with the aspiration action, which may cause damage to surrounding tissues, enlargement of the puncture site, increase in bleeding, etc., which in turn will cause the patient's pain to intensify and increase the risk of infection.

[0005] 2. Some existing devices use a sheath needle to address the problem of excessive force when the needle tip is inserted into the pleural cavity. When the outer needle body reaches the pleural lining, the inner needle core is pushed to puncture the pleural lining. However, in actual operation, since force needs to be applied during puncture, pushing to control the force may still result in excessive force, which may cause lung tissue damage, increased bleeding risk, and improper catheter placement. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a closed thoracic drainage puncture needle that solves the problem of the puncture needle easily moving left or right or back and forth during aspiration.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A closed thoracic drainage puncture needle includes a support assembly abutting against the patient's skin, a puncture assembly movably inserted within the support assembly, and a pair of limiting assemblies symmetrically arranged on both sides of the support assembly to limit the puncture assembly. The support assembly includes an abutting ring abutting against the patient's skin, an adhesive ring surrounding and covering the lower surface of the abutting ring, and an installation ring fixed within the abutting ring. The puncture assembly includes an outer needle body slidably fitted within the installation ring, an inner needle core movably fitted within the outer needle body, and a detachable control handle located at the lower end of the inner needle core. Each limiting assembly includes a clamping plate slidably fitted within one side of the installation ring and extending to the lower end of the installation ring, a return spring located between the clamping plate and the corresponding side installation ring, and limiting protrusions evenly and spaced along the height direction of the clamping plate on the inner side of the clamping plate. The outer wall of the outer needle body is provided with a plurality of limiting grooves spaced along the height direction to cooperate and fix with the limiting protrusions.

[0009] More preferably, the inner needle core is threadedly sleeved within the outer needle body.

[0010] More preferably, the upper end face of the adhesive ring is covered with an isolation film.

[0011] More preferably, the outer surface of the outer needle has a first scale line along the length direction, and the outer surface of the inner needle core has a second scale line along the length direction.

[0012] The present invention has the following beneficial effects:

[0013] 1. In this invention, the abutment ring and the mounting ring are fixed around the patient's puncture point by the adhesive ring. Then, the outer needle body is fixed by the cooperation of multiple limiting protrusions on the inner sidewall of the two clamping plates with the limiting grooves on the corresponding side of the outer needle body. This avoids the outer needle body from moving left and right or back and forth at the puncture point during the aspiration process as much as possible. This also avoids damage to surrounding tissues, enlargement of the puncture hole, and increased bleeding caused by the movement of the outer needle body, and avoids the patient's pain and increased risk of infection as much as possible.

[0014] 2. In this invention, the inner needle core is threadedly fitted inside the outer needle body. The inner needle core is punctured by rotation rather than pushing, thereby limiting the insertion speed of the inner needle core. This helps to avoid lung tissue damage, increased bleeding risk, and improper catheter placement caused by excessive force from the operator or excessively deep puncture of the inner needle core. Attached Figure Description

[0015] Figure 1 This is a front view of the puncture needle; Figure 2 for Figure 1 Schematic diagram of section AA; Figure 3 for Figure 2 Schematic diagram of cross-section at BB; Figure 4 for Figure 3 Enlarged view of the structure at point C; Figure 5 Illustration of the puncture process Figure 1 (The process of puncturing the patient's skin using a puncture device); Figure 6 Illustration of the puncture process Figure 2 (The process of inserting the inner needle into the pleural lining).

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Support assembly; 11. Abutment ring; 12. Adhesive ring; 121. Isolation membrane; 13. Mounting ring; 2. Puncture assembly; 21. Outer needle body; 211. Limiting groove; 212. Scale line; 22. Inner needle core; 23. Control handle; 3. Limiting assembly; 31. Clamping plate; 32. Return spring; 33. Limiting protrusion. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] A closed thoracic drainage puncture needle includes a support component 1 abutting against the patient's skin, a puncture component 2 movably inserted into the support component 1, and a pair of limiting components 3 symmetrically disposed on both sides inside the support component 1 to limit the puncture component 2; the support component 1 includes an abutting ring 11 abutting against the patient's skin, an adhesive ring 12 surrounding and covering the lower surface of the abutting ring 11, and a mounting ring 13 fixed within the abutting ring 11; the puncture component 2 includes an outer needle body 21 slidably sleeved within the mounting ring 13, and a movably sleeved within the outer needle body 21. The needle body 21 contains an inner needle core 22 and a detachable control handle 23 located at the lower end of the inner needle core 22; each set of limiting components 3 includes a clamping plate 31 slidably disposed on one side of the mounting ring 13 and extending to the lower end of the mounting ring 13, a return spring 32 disposed between the clamping plate 31 and the corresponding side mounting ring 13, and limiting protrusions 33 evenly and spaced along the height direction of the clamping plate 31 and disposed on the inner side of the clamping plate 31; the outer side wall of the outer needle body 21 is provided with a plurality of limiting grooves 211 spaced along the height direction to cooperate and fix with the limiting protrusions 33.

[0025] Before use, the abutment ring 11 is attached to the skin around the patient to be punctured using the adhesive ring 12. Then, the two clamping plates 31 are moved to the side away from each other so that the two clamping plates 31 are fully inserted into the mounting ring 13. Then, the puncture component 2 is passed through the middle of the mounting ring 13 and punctured into the patient's skin. The puncture is stopped when the tip of the outer needle body 21 touches the chest wall. The two clamping plates 31 are released so that the two clamping plates 31 move to the side closer to each other under the action of the two return springs 32 to clamp the outer needle body 21. At the same time, the limiting protrusion 33 on the inner side of the clamping plate 31 is also engaged and fixed with the corresponding limiting groove 211 on the outer side wall of the outer needle body 21.

[0026] As a possible implementation of this solution, preferably, the inner needle core 22 is threadedly sleeved inside the outer needle body 21; by threading the inner needle core 22 inside the outer needle body 21, the insertion speed of the inner needle core 22 can be limited, so as to avoid lung tissue damage, increased bleeding risk, improper catheter position, etc. caused by excessive force by the operator or excessive puncture depth of the inner needle core 22.

[0027] As a possible implementation of this solution, preferably, the upper surface of the adhesive ring 12 is covered with an isolation film 121; the isolation film 121 can minimize the occurrence of poor fixation and easy separation from the patient's skin due to the adhesion of dust and other objects on the adhesive ring 12 when the device is not in use.

[0028] As a possible implementation of this solution, preferably, the outer surface of the outer needle body 21 is provided with a first scale line 212 along the length direction, and the outer surface of the inner needle core 22 is provided with a second scale line 221 along the length direction; the depth of penetration of the outer needle body 21 and the inner needle core 22 can be read according to the setting of the first scale line 212 and the second scale line 221, so as to better control the puncture depth.

[0029] The working principle of this device is as follows:

[0030] First, peel the isolation film 121 off the adhesive ring 12, and then use the adhesive ring 12 to attach the abutment ring 11 to the area around the patient's skin that needs to be punctured;

[0031] The second step, as Figure 5 First, move the clamping plates 31 on both sides to the sides. Then, hold the outer needle body 21 and pass the front end through the installation ring 13 to drive the puncture component 2 into the patient's skin. Stop the puncture when the tip of the outer needle body 21 touches the chest wall.

[0032] The third step is to release the two clamping plates 13 and release the two clamping plates 31, so that the two clamping plates 31 move towards each other under the action of the two return springs 32, so as to clamp the outer needle body 21.

[0033] The fourth step is to spiral the inner needle core 22 upwards so that it is inserted into the patient's pleural lining.

[0034] The above description is merely a specific embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A closed thoracic drainage puncture needle, characterized in that: It includes a support component (1) that rests against the patient's skin, a puncture component (2) that is movably inserted into the support component (1), and a pair of limiting components (3) that are symmetrically arranged on both sides inside the support component (1) and used to limit the puncture component (2); The abutment assembly (1) includes an abutment ring (11) abutting against the patient's skin, an adhesive ring (12) surrounding and covering the lower surface of the abutment ring (11), and an mounting ring (13) fixed inside the abutment ring (11); The puncture assembly (2) includes an outer needle body (21) slidably sleeved in the mounting ring (13), an inner needle core (22) movably sleeved in the outer needle body (21), and a detachable control handle (23) located at the lower end of the inner needle core (22); Each set of limiting components (3) includes a clamping plate (31) that is slidably disposed on one side of the mounting ring (13) and extends to the bottom of the mounting ring (13), a return spring (32) disposed between the clamping plate (31) and the corresponding mounting ring (13), and limiting protrusions (33) that are evenly and spaced along the height direction of the clamping plate (31) on the inner side of the clamping plate (31); The outer side wall of the outer needle body (21) is provided with a plurality of limiting grooves (211) that are fixed to the limiting protrusions (33) along the height direction.

2. The closed thoracic drainage puncture needle according to claim 1, characterized in that: The inner needle core (22) is threaded inside the outer needle body (21).

3. The closed thoracic drainage puncture needle according to claim 1, characterized in that: The upper surface of the adhesive ring (12) is covered with an isolation film (121).

4. The closed thoracic drainage puncture needle according to claim 1, characterized in that: The outer surface of the outer needle body (21) is provided with a first scale line (212) along the length direction, and the outer surface of the inner needle core (22) is provided with a second scale line (221) along the length direction.

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