Pericardium puncture device

Abstract

The utility model relates to a pericardiocentesis device. The pericardiocentesis device comprises an inner needle assembly and an outer cannula assembly. The inner needle assembly comprises a rotating part, a needle seat and an inner needle, the needle seat is arranged at one end of the inner needle, and the rotating part is rotatably arranged outside the needle seat in a sleeving mode. The outer sleeve assembly comprises a sleeve seat and a sleeve arranged at one end of the sleeve seat, the inner needle and part of the needle seat are used for being arranged in the outer sleeve assembly in a penetrating mode, and the rotating piece is connected outside the sleeve seat in a threaded mode. When the rotating piece is rotated, the rotating piece can drive the needle seat to move in the axial direction of the rotating piece, so that the far end of the inner needle extends out of the cannula. The movement of the inner needle in the axial direction is controllable, and obvious hydropericardium caused by the fact that the cardiac muscle tissue is punctured due to the fact that the puncture depth of the inner needle cannot be controlled is avoided. And when the rotating piece is rotated, the needle seat can not rotate along with the rotating piece, so that the puncture direction of the tip of the inner needle end part is favorably kept, and tissues are prevented from being accidentally injured when the direction of the tip is changed.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a pericardiocentesis device. Background Art

[0002] Pericardiocentesis is an emergency treatment measure that can effectively relieve cardiac tamponade clinically and is also an important access for epicardial ablation of ventricular arrhythmias. Due to factors such as the narrow pericardial cavity, narrow puncture safety window, proximity to important organs, continuous beating of the heart, and the dense distribution of coronary arteries and veins on the heart surface, it is easy to damage the heart and its blood vessels and adjacent organs during pericardiocentesis, which can lead to complications such as acute cardiac tamponade, hemopneumothorax, abdominal organ injury, and lung injury. In severe cases, pericardial drainage, blood transfusion, thoracotomy, abdominal exploration, and surgical repair of tissues and organs are required, causing significant damage and economic burden to patients and also causing great pressure to physicians. Research shows that during pericardiocentesis,

[0003] In the related art, the pericardiocentesis device cannot control the puncture depth, and the incidence of obvious pericardial effusion caused by inadvertently puncturing the myocardial tissue is 3.7%-10%. Therefore, the difficulty of pericardiocentesis is high and the risk is relatively high. Utility Model Content

[0004] Based on this, it is necessary to provide a pericardiocentesis device to address the problem that the pericardiocentesis device in the related art cannot control the puncture depth.

[0005] A pericardiocentesis device, the pericardiocentesis device includes:

[0006] An inner needle assembly, including a rotating member, a needle seat, and an inner needle. The needle seat is provided at one end of the inner needle, and the rotating member is rotatably sleeved outside the needle seat;

[0007] An outer cannula assembly, including a cannula and a cannula seat provided at one end of the cannula. The inner needle and a part of the needle seat are configured to be inserted into the outer cannula assembly, and the rotating member is threadedly connected outside the cannula seat;

[0008] When the rotating member is screwed into the cannula seat, the rotating member can push the needle seat to move, so that the needle seat drives the inner needle to extend out of the cannula.

[0009] The needle seat includes an extension portion extending into the cannula seat. The inner needle is connected to the extension portion. A rotation prevention portion is provided on the extension portion, and a cooperation portion is provided on the inner wall of the inner hole of the cannula seat. The rotation prevention portion cooperates with the cooperation portion to limit the rotation of the rotation prevention portion.

[0010] In one embodiment, the anti-rotation part is a first cutting surface provided on the outer wall of the extension part, the matching part is a second cutting surface provided on the inner hole wall of the sleeve seat, and the first cutting surface is in fit with the second cutting surface.

[0011] In one embodiment, a limiting ring groove is formed in one of the rotating part and the needle seat, a limiting part is provided on the other, the limiting part is rotatably arranged in the limiting ring groove, and the limiting part and the limiting ring groove are in radial fit.

[0012] In one embodiment, the rotating part is axially provided with the mutually communicating limiting ring groove and threaded hole in sequence, the limiting part is arranged on the needle seat, and the sleeve seat is in threaded connection with the threaded hole.

[0013] In one embodiment, a limiting support is provided at one end of the needle seat away from the inner needle, and the limiting support is used for abutting against the end of the rotating part.

[0014] In one embodiment, a tip is provided at one end of the inner needle away from the needle seat, and the tip is bent relative to the inner needle into an arc structure.

[0015] In one embodiment, the bending angle of the tip relative to the inner needle is 10°-60°.

[0016] In one embodiment, the anti-rotation part is located on one side of the axis of the extension part along the first direction, and the tip is bent relative to the inner needle toward the first direction.

[0017] In one embodiment, the sleeve seat includes a wing part perpendicular to the sleeve, and the wing part is an arc structure.

[0018] In one embodiment, a first through pipeline is formed on the needle seat, a second through pipeline is formed in the inner needle, the diameter of the first through pipeline is larger than that of the second through pipeline, and the diameter of one end of the first through pipeline is gradually reduced to be connected with the second through pipeline.

[0019] The above pericardiocentesis device has the rotating member threadedly connected to the outside of the sleeve base. At the same time, the rotating member is used to limit the axial movement of the needle base. Therefore, when the rotating member rotates, it can push the needle base to move axially, and then push the inner needle to move axially through the needle base until the distal end of the inner needle extends out of the sleeve and reaches the puncture depth. That is, in this application, the axial movement of the inner needle is converted into the rotation of the rotating member, so that the axial movement of the inner needle is controllable, avoiding obvious pericardial effusion caused by the inner needle puncturing the myocardial tissue due to the inability to control the puncture depth. In addition, the rotating member is rotatably sleeved outside the needle base, that is, the rotating member can rotate relative to the needle base. When the rotating member is rotated, the needle base may not follow the rotating member to rotate, which is beneficial to maintaining the puncture direction of the tip of the inner needle end and preventing tissue injury when the tip direction changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of a pericardiocentesis device in an embodiment.

[0021] Figure 2 FIG. is an exploded structural diagram of a pericardiocentesis device in an embodiment.

[0022] Figure 3 FIG. is a schematic structural diagram of a needle base in an embodiment.

[0023] Figure 4 FIG. is a schematic structural diagram of a rotating member in an embodiment.

[0024] Figure 5 FIG. is a schematic structural diagram of a sleeve base in an embodiment.

[0025] Figure 6 FIG. is a schematic internal structural diagram of a pericardiocentesis device in an embodiment.

[0026] Reference numerals: 100, inner needle assembly; 110, rotating member; 111, embedding groove; 112, limiting ring groove; 113, threaded hole; 114, anti-slip portion; 120, needle base; 121, extension portion; 122, anti-rotation portion; 123, limiting support; 124, limiting portion; 130, inner needle; 140, tip; 200, outer sleeve assembly; 210, sleeve base; 211, mating portion; 212, wing portion; 220, sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0029] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0030] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "couple", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0033] Referring to Figure 1 and Figure 2 , a pericardiocentesis device provided in an embodiment of the present application, the pericardiocentesis device includes an inner needle assembly 100 and an outer cannula assembly 200. The inner needle assembly 100 includes a rotating member 110, a needle holder 120 and an inner needle 130. The needle holder 120 is disposed at one end of the inner needle 130. The rotating member 110 is rotatably sleeved outside the needle holder 120 and is used to limit the axial movement of the needle holder 120. The outer cannula assembly 200 includes a cannula 220 and a cannula base 210 disposed at one end of the cannula 220. The inner needle 130 and a part of the needle holder 120 are used to pass through the outer cannula assembly 200. The rotating member 110 is threadedly connected outside the cannula base 210. When the rotating member 110 is screwed into the cannula 220, the rotating member 110 can push the needle holder 120 to move so that the needle holder 120 drives the inner needle 130 to extend out of the cannula 220.

[0034] In this embodiment, the rotating member 110 is threadedly connected to the outside of the sleeve base 210, and at the same time, the rotating member 110 is rotatably sleeved on the outside of the needle base 120. Therefore, when the rotating member 110 rotates, it can push the needle base 120 to move along its axis, and then push the inner needle 130 to move axially through the needle base 120 until the distal end of the inner needle 130 extends outside the sleeve 220 and reaches the puncture depth. That is, in this application, the axial movement of the inner needle 130 is converted into the rotation of the rotating member 110, so that the axial movement of the inner needle 130 is controllable, and it is avoided that the inner needle 130 punctures the myocardial tissue due to the uncontrollable puncture depth, resulting in obvious pericardial effusion. In addition, the rotating member 110 is rotatably sleeved on the outside of the needle base 120, that is, the rotating member 110 can rotate relative to the needle base 120. When the rotating member 110 is rotated, the needle base 120 will not rotate with the rotating member 110, which is beneficial to maintaining the puncture direction of the tip 140 at the end of the inner needle 130 and preventing tissue injury when the direction of the tip 140 changes.

[0035] In some embodiments, in combination with Figure 3 , Figure 5 and Figure 6 , the needle base 120 includes an extension portion 121 extending into the sleeve base 210. The inner needle 130 is connected to the extension portion 121. A rotation stopping portion 122 is provided on the extension portion 121, and a mating portion 211 is provided on the inner hole wall of the sleeve base 210. The rotation stopping portion 122 cooperates with the mating portion 211 to limit the rotation of the rotation stopping portion 122.

[0036] In this embodiment, the extension portion 121 extends into the sleeve 220 and cooperates with the mating portion 211 through the rotation stopping portion 122 to limit the rotation of the rotation stopping portion 122. When the rotating member 110 is rotated to push the inner needle 130 to move axially, since the rotation stopping portion 122 cooperates with the mating portion 211, that is, without the outer sleeve assembly 200 rotating, neither the needle base 120 nor the inner needle 130 will rotate, avoiding tissue injury when the direction of the tip 140 changes.

[0037] In one embodiment, the rotation stopping portion 122 is a first cutting surface provided on the outer wall of the extension portion 121, and the mating portion 211 is a second cutting surface provided on the inner hole wall of the sleeve base 210. The first cutting surface fits with the second cutting surface.

[0038] When inserting the inner needle assembly 100 into the outer sleeve assembly 200, first, the inner needle assembly 100 needs to be rotated so that the positions of the first cutting surface and the second cutting plane correspond, and then the inner needle assembly 100 is inserted into the outer sleeve assembly 200. Finally, the rotating member 110 is rotated so that the distal end of the inner needle 130 gradually extends outside the distal end of the sleeve 220.

[0039] In another embodiment, one of the anti-rotation portion 122 and the mating portion 211 is a groove, and the other is a protrusion. The protrusion is inserted into the groove, which can also prevent the needle seat 120 from rotating relative to the cannula seat.

[0040] In some embodiments, in combination Figure 3 , Figure 4 and Figure 6 , a limiting ring groove 112 is formed in one of the rotating member 110 and the needle seat 120, and a limiting portion 124 is provided on the other. The limiting portion 124 is rotatably arranged in the limiting ring groove 112, and the limiting portion 124 and the limiting ring groove 112 are in radial cooperation.

[0041] In this embodiment, the limiting portion 124 and the limiting ring groove 112 are in radial cooperation. When one of the limiting portion 124 or the limiting ring groove 112 moves axially, it can drive the other to move axially as well. At the same time, since the limiting portion 124 is rotatably arranged in the limiting ring groove 112, that is, when one of the rotating member 110 and the needle seat 120 rotates, the other can remain stationary, avoiding the inner needle 130 being driven to rotate and injuring tissues when the cannula seat 210 rotates.

[0042] In some embodiments, in combination Figure 4 , the rotating member 110 is axially provided with a limiting ring groove 112 and a threaded hole 113 that communicate with each other. The limiting portion 124 is provided on the needle seat 120, and the cannula seat 210 is threadedly connected to the threaded hole 113.

[0043] In one embodiment, the limiting ring groove 112 is formed in the rotating member 110, the limiting portion 124 is provided on the needle seat 120, the limiting portion 124 is rotatably arranged in the limiting ring groove 112, and the limiting portion 124 and the limiting ring groove 112 are in radial cooperation, so as to realize the connection between the needle seat 120 and the rotating member 110. At the same time, the rotating member 110 is also provided with a threaded hole 113, and the cannula seat 210 is threadedly connected to the threaded hole 113, thereby connecting the rotating member 110 and the cannula seat 210.

[0044] Specifically, the extension portion 121 extends distally from the limiting portion 124. The outer diameter of the extension portion 121 is smaller than the inner diameter of the cannula seat 210. The outer wall of the cannula seat 210 is threadedly connected to the inner wall of the rotating member 110. An embedding groove 111 is also formed in the rotating member 110. The embedding groove 111, the limiting ring groove 112, and the threaded hole 113 are arranged axially in sequence, and the needle seat 120 extends into the embedding groove 111.

[0045] In combination Figure 1 , an anti-slip portion 114 is provided on the outside of the rotating member 110. The anti-slip portion 114 can be an external thread for increasing the friction during rotation.

[0046] In some other embodiments, the limiting ring groove 112 is formed on the needle holder 120, the limiting portion 124 is arranged on the rotating member 110, the limiting portion 124 is rotatably arranged in the limiting ring groove 112, and the limiting portion 124 is in radial cooperation with the limiting ring groove 112, so as to realize the connection between the needle holder 120 and the rotating member 110.

[0047] Further, a limiting support 123 is arranged at one end of the needle holder 120 away from the inner needle 130, and the limiting support 123 is used for abutting against the end of the rotating member 110.

[0048] Wherein, the limiting ring groove 112 is formed in the middle of the needle holder 120 (between the embedding groove 111 and the threaded hole 113), and the limiting support 123 is arranged at the proximal end of the inner needle 130 seat 120. When the needle holder 120 extends into the rotating member 110, one end of the rotating member 110 is limited by the limiting ring groove 112, and the other end is limited by the limiting support 123. At this time, when the rotating member 110 moves axially, the needle holder 120 will be driven to move axially.

[0049] In some embodiments, combined with Figure 1 , a tip 140 is arranged at one end of the inner needle 130 away from the needle holder 120, and the tip 140 is bent relative to the inner needle 130 to form an arc structure.

[0050] In this embodiment, the pericardium is a sac covering the outside of the heart. After the pericardiocentesis needle penetrates into the pericardium, it is necessary to avoid damaging the heart when continuing to move forward. Therefore, the tip 140 is bent relative to the inner needle 130 to form an arc structure, which is used to prevent the inner needle 130 from damaging the heart when continuing to move forward, and at the same time, it can also make the tip 140 move towards the pericardium in another direction.

[0051] Specifically, the bending angle of the tip 140 relative to the inner needle 130 is 10°-60°.

[0052] Preferably, the bending angle of the tip 140 relative to the inner needle 130 is 30°.

[0053] Further, the anti-rotation portion 122 is located on one side of the axis of the extension portion 121 along the first direction, and the tip 140 is bent relative to the inner needle 130 towards the first direction.

[0054] In this embodiment, the bending direction of the tip 140 is the same as the setting direction of the anti-rotation portion 122 relative to the axis of the extension portion 121, which is convenient for the doctor to determine the direction of the tip 140 according to the direction of the anti-rotation portion 122.

[0055] In some embodiments, the cannula base 210 includes a wing portion 212 perpendicular to the cannula 220, and the wing portion 212 is an arc structure.

[0056] In the present application, the wing portion 212 is provided to facilitate the doctor to hold the wing portion 212 for operation. At the same time, when the doctor holds the pericardiocentesis needle and inserts it into the human body, it is usually inserted at an angle of 15°-45° in the thoracic cavity. The wing portion 212 is set as an arc structure to reduce the contact between the wing portion 212 and the patient's thoracic cavity.

[0057] In some embodiments, a first through pipeline is provided on the needle holder 120, and a second through pipeline is provided in the inner needle 130. The first through pipeline is communicated with the second through pipeline for aspirating liquid, for example, for aspirating pericardial effusion. The diameter of the first through pipeline is larger than that of the second through pipeline. One end of the first through pipeline close to the second through pipeline gradually narrows in a funnel shape to be connected with the second through pipeline. A Luer interface is provided at one end of the needle holder 120 away from the inner needle 130. The Luer interface is used to connect a syringe, so as to aspirate or inject liquid into the pericardial effusion.

[0058] Specifically, the inner needle 130 is an 18G puncture needle.

[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0060] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A pericardiocentesis device, characterized in that, The pericardiocentesis device includes: An inner needle assembly, including a rotating member, a needle seat, and an inner needle. The needle seat is arranged at one end of the inner needle, and the rotating member is rotatably sleeved outside the needle seat; An outer sleeve assembly, including a sleeve and a sleeve seat arranged at one end of the sleeve. The inner needle and part of the needle seat are used to penetrate into the outer sleeve assembly, and the rotating member is threadedly connected outside the sleeve seat; When the rotating member is screwed into the sleeve seat relative to the sleeve seat, the rotating member can push the needle seat to move, so that the needle seat drives the inner needle to extend out of the sleeve; The needle seat includes an extension part extending into the sleeve seat. The inner needle is connected to the extension part. A rotation stopping part is arranged on the extension part, and a matching part is arranged on the inner hole wall of the sleeve seat. The rotation stopping part and the matching part cooperate to limit the rotation of the rotation stopping part.

2. The pericardiocentesis device according to claim 1, wherein, The rotation stopping part is a first cutting surface arranged on the outer wall of the extension part, and the matching part is a second cutting surface arranged on the inner hole wall of the sleeve seat. The first cutting surface is in contact with the second cutting surface.

3. The pericardiocentesis device according to claim 1, wherein, A limiting ring groove is formed in one of the rotating member and the needle seat, and a limiting part is arranged on the other. The limiting part is rotatably arranged in the limiting ring groove, and the limiting part and the limiting ring groove are in radial cooperation.

4. The pericardiocentesis device according to claim 3, characterized in that, The rotating member is axially provided with the limiting ring groove and a threaded hole communicating with each other in sequence. The limiting part is arranged on the needle seat, and the sleeve seat is threadedly connected to the threaded hole.

5. The pericardiocentesis device according to claim 3, wherein A limiting support is arranged at one end of the needle seat away from the inner needle. The limiting support is used to abut against the end of the rotating member.

6. The pericardiocentesis device according to claim 1, characterized in that, A tip is arranged at one end of the inner needle away from the needle seat. The tip is bent relative to the inner needle into an arc structure.

7. The pericardiocentesis device according to claim 6, wherein, The bending angle of the tip relative to the inner needle is 10°-60°.

8. The pericardiocentesis device according to claim 6, wherein, The rotation stopping part is located on one side of the axis of the extension part along the first direction, and the tip is bent relative to the inner needle toward the first direction.

9. The pericardiocentesis device according to claim 1, wherein, The sleeve seat includes a wing part perpendicular to the sleeve. The wing part is an arc structure.

10. The pericardiocentesis device according to claim 1, wherein, A first through pipeline is formed in the needle seat, and a second through pipeline is formed in the inner needle. The diameter of the first through pipeline is larger than that of the second through pipeline. One end of the first through pipeline gradually reduces in diameter to be connected to the second through pipeline.

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