A pericardial thoracentesis and effusion drainage device
By designing the insertion and extraction mechanisms of the pericardiothoracic puncture and effusion drainage device, and utilizing the combination of elastic strips and cones, the problem of drainage port blockage was solved, enabling smoother effusion extraction and reducing tissue damage, thus improving safety and patient comfort.
Patent Information
- Application Number
- CN202510208617.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2045-02-25
AI Technical Summary
Existing pericardiothoracic puncture and effusion drainage devices have poor safety during use. They are prone to blockage of the drainage port due to excessive negative pressure, which cannot effectively relieve symptoms and may delay treatment.
A pericardial thoracentesis and effusion drainage device was designed, which employs a puncture and extraction mechanism, including an external tube, a needle, an elastic strip, a cone, and a deformation component. By the interval distribution of the elastic strip and the deformation control of the cone, the drainage port is not easily blocked, thus reducing tissue damage.
It improves the efficiency of fluid drainage, reduces the risk of drainage port blockage, reduces the physical burden and psychological stress on patients, and reduces treatment risks and pain.
Smart Images
Figure CN119680033B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to a device for pericardial thoracentesis and effusion drainage. Background Technology
[0002] In clinical practice, pericardiocentesis and thoracentesis are key treatment methods for patients with pericardial effusion and pleural effusion. Timely and effective drainage of these effusions can significantly relieve symptoms such as dyspnea and palpitations caused by effusion compressing the heart and lungs, providing strong support for disease diagnosis and subsequent treatment.
[0003] In the drainage process, controlling the suction speed is extremely crucial. When medical staff increase the suction force in pursuit of rapid symptom relief, excessive negative pressure can cause the tissue near the effusion to collapse rapidly. Taking pericardial effusion drainage as an example, once the tissue around the pericardium collapses, the drainage opening of the drainage tube is easily blocked, resulting in poor drainage. This not only fails to achieve the expected treatment effect but may also delay the condition and lead to more serious consequences. Summary of the Invention
[0004] Therefore, it is necessary to provide a new pericardial thoracentesis and effusion drainage device to address the poor safety of current pericardial thoracentesis and effusion drainage devices.
[0005] The above objectives are achieved through the following technical solutions:
[0006] A pericardiothoracic puncture and effusion drainage device includes a puncture mechanism and an aspiration mechanism. The puncture mechanism includes an external tube, a needle, elastic strips, a cone, and a deformation component. The external tube is placed outside the patient's body. One end of the needle is fixedly connected to and communicates with the external tube, and the other end of the needle extends into the patient's body. Multiple elastic strips are provided, each with one end fixedly connected to the end of the needle away from the external tube. Each elastic strip extends along the axial direction of the needle when not subjected to external force, and the multiple elastic strips are spaced apart around the axis of the needle. The cone is coaxial with the needle, and the large end of the cone is fixedly connected to the end of each elastic strip away from the needle. When the cone moves closer to the needle along the axial direction, the middle part of each elastic strip can bend in the radial direction away from the axis of the needle. The deformation component is used to control the cone to move closer to or away from the needle along the axial direction. The aspiration mechanism is used to aspirate effusion from the patient's body through the needle.
[0007] Preferably, the large end of the cone is fixed to the inner side of the circumference formed by multiple elastic strips.
[0008] Preferably, each elastic strip has a thick end and a thin end in the axial direction of the needle tube, with the thick end of the elastic strip fixedly installed at the end of the needle tube and the thin end of the elastic strip fixedly installed on the cone.
[0009] Preferably, each elastic strip has a bevel at its narrow end. The bevel gradually moves away from the axis of the needle tube from the connection point between the elastic strip and the cone to the side closest to the needle tube, and the bevel is parallel to the cone surface at the corresponding position of the cone.
[0010] Preferably, the deformation assembly includes a mounting shell, a rotating shaft, a wire, a gear, and a paddle. The mounting shell is fixedly mounted on the outer tube and is connected to the outer tube. The rotating shaft is rotatably disposed inside the mounting shell, with one end of the shaft passing through the mounting shell and located outside the mounting shell. One end of the wire is fixedly mounted on the circumferential surface of the rotating shaft, and the other end of the wire is fixedly mounted on the middle of the large end of the cone. The wire is located inside the mounting shell and the outer tube. The gear is disposed inside the mounting shell and is sleeved on the rotating shaft. One side of the paddle is fixedly mounted on the mounting shell, and the paddle is elastic, allowing the gear to contact the paddle when rotating.
[0011] Preferably, the connection position between the paddle and the mounting housing is at an angle to the axis of the rotating shaft on the same plane.
[0012] Preferably, the external force experienced by the elastic strip when it deforms is greater than the resistance when the cone comes into contact with the patient's tissue.
[0013] Preferably, the extraction mechanism includes a tubing and a syringe, with the syringe connected to an external tube via the tubing.
[0014] Preferably, the syringe and the tubing are connected by a thread.
[0015] Preferably, the extraction mechanism includes a collection bag, which is connected to an external tube.
[0016] The beneficial effects of this invention are: 1. The cone shape makes it easier to insert the needle into the patient's body; the spaced arrangement of multiple elastic strips allows the fluid in the patient's body to enter the needle from multiple directions through the gaps between the elastic strips, improving the efficiency of fluid extraction; through the combination of the deformation component and the cone, and the cone and multiple elastic strips, when the cone approaches the needle, the middle part of the multiple elastic strips bends in the radial direction of the needle away from the axis of the needle, increasing the local distance between two adjacent elastic strips. If the end of the needle entering the patient's body is the drainage port, the tissue around the drainage port is stretched open by the multiple elastic strips, making it less likely to be blocked when extracting fluid, and the fluid extraction process is smoother.
[0017] 2. After the middle parts of multiple elastic strips are separated from each other under the action of the cone, the axial movement of the needle in the patient's body will be subject to certain resistance, the drainage port is not easy to leave the drainage area, and repeated punctures are not required, which reduces the patient's physical burden and psychological pressure.
[0018] 3. As the cone approaches the needle tube and multiple elastic strips bend, the smaller end of the cone gradually shrinks between the elastic strips as the degree of bending increases. This prevents the cone from damaging the patient's tissues after the needle tube shakes, reducing the patient's pain and treatment risks. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of a pericardial thoracentesis and effusion drainage device provided in an embodiment of the present invention;
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle;
[0022] Figure 4 This is a schematic diagram of the puncture and drainage mechanism of a pericardial thoracentesis and effusion drainage device provided in an embodiment of the present invention;
[0023] Figure 5 for Figure 4 A cross-sectional view along the CC direction;
[0024] Figure 6 for Figure 5 Enlarged view at point E in the middle;
[0025] Figure 7 This is a schematic diagram of the elastic strip deformation structure of a pericardial thoracentesis and effusion drainage device provided in an embodiment of the present invention.
[0026] in:
[0027] 100. External tube; 101. Needle; 102. Elastic strip; 103. Cone; 110. Mounting shell; 111. Shaft; 112. Handle; 113. Thread; 114. Gear; 115. Paddle; 116. Tube; 117. Syringe. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0029] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0031] like Figures 1 to 7 As shown in the figure, an embodiment of the present invention provides a pericardial thoracentesis and effusion drainage device, including a puncture mechanism and an aspiration mechanism. The puncture mechanism includes an external tube 100, a needle tube 101, an elastic strip 102, a cone 103, and a deformation component. The external tube 100 is disposed outside the patient's body. One end of the needle tube 101 is fixedly connected to and communicates with the external tube 100, and the other end of the needle tube 101 extends into the patient's body. Multiple elastic strips 102 are provided, and one end of each elastic strip 102 is fixedly connected to the end of the needle tube 101 away from the external tube 100. Each elastic strip 102, when not subjected to external force, moves along the needle tube 101. Extending in the axial direction, multiple elastic strips 102 are spaced apart around the axis of the needle tube 101; a cone 103 is coaxial with the needle tube 101, and the large end of the cone 103 is fixedly connected to the end of each elastic strip 102 away from the needle tube 101. When the cone 103 moves closer to the needle tube 101 in the axial direction, the middle part of each elastic strip 102 can bend in the radial direction of the needle tube 101 away from the axis of the needle tube 101; a deformation component is used to control the cone 103 to move closer to or away from the needle tube 101 in the axial direction; an extraction mechanism is used to extract the accumulated fluid in the patient's body through the needle tube 101.
[0032] The cone 103 makes it easier to insert the needle 101 into the patient's body. The spaced arrangement of multiple elastic strips 102 allows fluid from the patient's body to enter the needle 101 from multiple directions through the gaps between the elastic strips 102, improving the efficiency of fluid extraction. Through the combination of the deformation component and the cone 103, and the cone 103 and multiple elastic strips 102, when the cone 103 approaches the needle 101, the middle part of the multiple elastic strips 102 bends away from the axis of the needle 101 along the radial direction of the needle 101, increasing the distance between two adjacent elastic strips 102. Assuming the end of the needle 101 entering the patient's body is the drainage port, the tissue around the drainage port is stretched open by the multiple elastic strips 102, making the drainage port less likely to be blocked during fluid extraction, and making the fluid extraction process smoother.
[0033] After the middle portions of the multiple elastic strips 102 move away from each other under the action of the cone 103, the axial movement of the needle 101 within the patient's body will encounter certain resistance. This prevents the drainage port from easily slipping out of the drainage area, eliminating the need for repeated punctures and reducing the patient's physical burden and psychological stress. As the cone 103 approaches the needle 101 and the multiple elastic strips 102 bend, the smaller end of the cone 103 gradually retracts between the multiple elastic strips 102 as the degree of bending increases. Even when the needle 101 vibrates, the cone 103 will not damage the patient's internal tissues, reducing patient pain and treatment risks.
[0034] In this embodiment, fixing the large end of the cone 103 to the inner side of the circumference formed by multiple elastic strips 102 reduces the volume of the cone 103, thereby reducing the resistance during the insertion of the cone 103 into the patient's body.
[0035] In this embodiment, each elastic strip 102 has a thick end and a thin end in the axial direction of the needle tube 101. The thick end of the elastic strip 102 is fixedly installed on the end of the needle tube 101, and the thin end of the elastic strip 102 is fixedly installed on the cone 103. When no deformation occurs, the distance between the thick ends of two adjacent elastic strips 102 is smaller than the distance between their thin ends. After the fluid is drawn, the cone 103 is moved away from the needle tube 101 by the deformation component, and the multiple elastic strips 102 move closer to each other. When the needle tube 101 is pulled out, the distance between the middle of two adjacent elastic strips 102 will decrease, and at the same time, the tissue between two adjacent elastic strips 102 will move from the thick end of the elastic strip 102 to the thin end of the elastic strip 102. The tissue between two adjacent elastic strips 102 can be easily separated from the two adjacent elastic strips 102, reducing the damage of the elastic strip 102 to the surrounding tissue.
[0036] In this embodiment, each elastic strip 102 has a beveled end. The beveled end gradually moves away from the axis of the needle tube 101 from the connection position between the elastic strip 102 and the cone 103 to the side near the needle tube 101. The beveled end is parallel to the cone surface at the corresponding position of the cone 103. When the elastic strip 102 comes into contact with the patient's body tissue, the beveled end on the elastic strip 102 will guide the elastic strip 102 to move smoothly between the patient's tissues.
[0037] In this embodiment, the deformation assembly includes a mounting shell 110, a rotating shaft 111, a handle 112, a wire 113, a gear 114, and a paddle 115. The mounting shell 110 is fixedly mounted on the outer tube 100 and communicates with the outer tube 100. The rotating shaft 111 is rotatably disposed inside the mounting shell 110, with one end of the rotating shaft 111 penetrating through the mounting shell 110 and located outside the mounting shell 110. The handle 112 is fixedly mounted on the end of the rotating shaft 111 located outside the mounting shell 110 to facilitate rotation of the rotating shaft 111. One end of the wire 113 is fixedly mounted on the circumferential surface of the rotating shaft 111, and the other end of the wire 113 is fixedly mounted on the middle of the large end of the cone 103. The wire 113 is located inside the mounting shell 110 and the outer tube 100. The gear 114 is disposed inside the mounting housing 110 and is sleeved on the rotating shaft 111. One side of the paddle 115 is fixedly mounted on the mounting housing 110 and the paddle 115 is elastic. When the gear 114 rotates, it can contact the paddle 115. The rotation of the gear 114 is blocked by the paddle 115. When the rotating shaft 111 rotates, it can wind the thread 113. The winding of the thread 113 will pull the cone 103 closer to the needle tube 101. At this time, the multiple elastic strips 102 will deform. When the rotating shaft 111 is rotated by the handle 112, the gear 114 will contact the paddle 115, causing the paddle 115 to bend. After the paddle 115 undergoes a certain shape deformation, the gear 114 will pass over the paddle 115. When the handle 112 is no longer turned, the multiple elastic strips 102 will apply a force to the rotating shaft 111 to rotate in the opposite direction through the thread 113. The rotating shaft 111 has a tendency to rotate in the opposite direction. At this time, the paddle 115 is in contact with the gear 114. The thrust applied by the gear 114 to the paddle 115 is not enough to make the paddle 115 produce a deformation that allows the gear 114 to pass over it. The paddle 115 hinders the reverse rotation of the gear 114, and the multiple elastic strips 102 maintain the deformed state.
[0038] In this embodiment, the connection position of the paddle 115 and the mounting housing 110 is at an angle to the plane containing the axis of the rotating shaft 111 and the paddle 115. The rotation direction of the rotating shaft 111 is divided into forward and reverse. When the rotating shaft 111 is driven to rotate forward by the handle 112, the gear 114 moves from the position where the paddle 115 is connected to the mounting housing 110 to the position where the paddle 115 contacts the gear 114. At this time, the paddle 115 will deform after contacting the gear 114, and the thread 113 will continuously wind around the rotating shaft 111. When the rotating shaft 111 is driven to rotate in the reverse direction by the handle 112, the gear 114 will rotate in the reverse direction. 14. Move from the position where the paddle 115 contacts the gear 114 to the position where the paddle 115 connects to the mounting housing 110. During the process, the paddle 115 is subjected to a large thrust from the gear 114. The paddle 115 will undergo deformation exceeding its maximum capacity, thus breaking. The thread 113 wrapped around the rotating shaft 111 will be continuously released, and multiple deformed elastic strips 102 will recover. The recovered elastic strips 102 will not maintain the deformed state under the action of the broken paddle 115, so that the pericardial thoracentesis and effusion drainage device cannot be reused to prevent cross-infection from repeated use.
[0039] In this embodiment, the external force experienced by the elastic strip 102 when it deforms is greater than the resistance when the cone 103 comes into contact with the patient's tissue. During the process of inserting the cone 103 into the patient's body, multiple elastic strips 102 can be inserted into the patient's body without deformation, and the elastic strips 102 enter the patient's body relatively smoothly.
[0040] In this embodiment, the extraction mechanism includes a flexible tube 116 and a syringe 117. The syringe 117 is connected to the external tube 100 through the flexible tube 116. After the needle tube 101 is inserted into the patient's body, the drainage port reaches the drainage area and the multiple elastic strips 102 are stretched open, the accumulated fluid in the patient's body can be extracted through the syringe 117. The accumulated fluid enters the syringe 117 after passing through the needle tube 101, the external tube 100 and the flexible tube 116 in sequence. During the extraction of accumulated fluid, the shaking generated by the movement of the syringe 117 will not directly affect the external tube 100, and the needle tube 101 is relatively stable.
[0041] In this embodiment, the syringe 117 and the tubing 116 are threaded together. After the syringe 117 is filled with liquid, it can be replaced by rotating relative to the tubing 116. Compared with the existing plug-in type, this can effectively reduce the shaking of the tubing 116 when replacing the syringe 117.
[0042] In some other embodiments, the extraction mechanism includes a collection bag connected to an external tube 100. The collection bag has a certain degree of negative pressure. After the collection bag is connected to the external tube 100, the fluid in the patient's body can enter the collection bag under the action of negative pressure, reducing the difficulty of operation.
[0043] The working principle of the pericardial thoracentesis and effusion drainage device provided in the above embodiments is as follows:
[0044] First, the syringe 117 and the external tube 100 are connected through the tubing 116. Then, the needle 101 is inserted into the patient's fluid accumulation site. When the cone 103 comes into contact with the patient's skin, the cone 103 will pierce the patient's skin and enter the patient's body. Subsequently, the elastic strip 102 and the needle 101 will also enter the patient's body.
[0045] Once the syringe 101 is moved to the drainage area, the handle 112 is rotated. The handle 112 drives the rotating shaft 111 to rotate in the forward direction. The rotation of the rotating shaft 111 causes the thread 113 to wrap around the circumference of the rotating shaft 111. The thread 113 continuously wraps around the rotating shaft 111, and the thread 113 between the rotating shaft 111 and the cone 103 becomes shorter and shorter. The thread 113 pulls the cone 103 closer to the syringe 101. The middle part of the multiple elastic strips 102 is affected by the cone 103 and the syringe 101. After being squeezed, the elastic strip 102 deforms and bulges away from the axis of the needle tube 101. The deformed elastic strip 102 supports the tissue near the drainage port, while the cone 103 shrinks between the multiple deformed elastic strips 102. As the rotating shaft 111 rotates, the rotating shaft 111 drives the gear 114 to rotate. When the gear 114 rotates, it contacts the paddle 115. The rotating gear 114 pushes the paddle 115 to deform a certain amount and then passes over the paddle 115.
[0046] After the elastic strip 102 forms a predetermined shape, the handle 112 is no longer rotated. At this time, the elastic strip 102 is in an energy storage state. Under the action of the cone 103 and the thread 113, the rotating shaft 111 has a tendency to rotate in the opposite direction. At the same time, with the cooperation of the paddle 115 and the gear 114, the rotating shaft 111 is stationary relative to the mounting shell 110. At this time, the accumulated fluid in the patient's body can be drawn out through the syringe 117.
[0047] After the fluid is drained, turn the handle 112 in the opposite direction. At this time, the paddle 115 is deformed and breaks under the action of the gear 114. The paddle 115 no longer hinders the rotation of the gear 114, the elastic strip 102 is restored, and finally the syringe 101 is pulled out.
[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. A device for pericardial thoracentesis and effusion drainage, characterized in that, The device includes an insertion mechanism and an extraction mechanism. The insertion mechanism comprises an external tube, a needle tube, elastic strips, a cone, and a deformation component. The external tube is positioned outside the patient's body. One end of the needle tube is fixedly connected to and communicates with the external tube, while the other end of the needle tube extends into the patient's body. Multiple elastic strips are provided, each with one end fixedly connected to the end of the needle tube furthest from the external tube. Each elastic strip extends along the axial direction of the needle tube when not subjected to external force, and the multiple elastic strips are spaced apart around the axis of the needle tube. The cone is coaxial with the needle tube, and the large end of the cone is fixedly connected to the end of each elastic strip furthest from the needle tube and fixed to the inner side of the circumference formed by the multiple elastic strips. When the cone approaches the needle tube along its axial direction, the middle of each elastic strip... The section can bend in the radial direction of the needle tube away from the axis of the needle tube. As the degree of bending of the elastic strip increases, the small end of the cone gradually shrinks between multiple elastic strips to avoid the needle tube shaking and causing the cone to damage the patient's tissues. Each elastic strip has a thick end and a thin end in the axial direction of the needle tube. The thick end of the elastic strip is fixedly installed at the end of the needle tube, and the thin end of the elastic strip is fixedly installed on the cone. When the elastic strip does not deform, the distance between the thick ends of adjacent elastic strips is smaller than the distance between the thin ends. Each thin end of the elastic strip has an inclined surface. The inclined surface gradually moves away from the axis of the needle tube from the connection position of the elastic strip and the cone to the side closer to the needle tube, and the inclined surface is parallel to the cone surface at the corresponding position of the cone. The deformation component is used to control the cone to move closer to or further away from the needle tube along the axial direction; the aspiration mechanism is used to aspirate the accumulated fluid in the patient's body through the needle tube; after the aspiration is completed, the deformation component controls the cone to move away from the needle tube, and multiple elastic strips move closer to each other. When the needle tube is pulled out, the distance between the middle of two adjacent elastic strips will decrease, and at the same time, the tissue between two adjacent elastic strips will move from the thick end of the elastic strip to the thin end of the elastic strip. The tissue between two adjacent elastic strips can be more easily separated from the two adjacent elastic strips, reducing the damage of the elastic strips to the surrounding tissues. The deformation assembly includes a mounting shell, a rotating shaft, a wire, a gear, and a lever. The mounting shell is fixedly mounted on an outer tube and is connected to the outer tube. The rotating shaft is rotatably mounted inside the mounting shell, with one end penetrating the shell and located outside. One end of the wire is fixedly mounted on the circumference of the rotating shaft, and the other end is fixedly mounted on the center of the large end of the cone. The wire is located inside the mounting shell and the outer tube. The gear is housed inside the mounting shell and sleeved on the rotating shaft. One side of the lever is fixedly mounted on the mounting shell, and the lever is elastic, allowing it to contact the gear when it rotates. The connection point between the paddle and the mounting housing is at an angle to the axis of the rotating shaft. The rotating shaft rotates in two directions: forward and reverse. When the rotating shaft rotates in the reverse direction, the paddle will deform beyond its maximum capacity, thus breaking. The threads wrapped around the rotating shaft will be released continuously, and multiple deformed elastic strips will recover. The recovered elastic strips will not maintain their deformed state under the action of the broken paddle, so that the pericardial thoracentesis and effusion drainage device cannot be reused to prevent cross-infection from repeated use.
2. The pericardial thoracentesis and effusion drainage device according to claim 1, characterized in that, The external force experienced by the elastic strip when it deforms is greater than the resistance when the cone comes into contact with the patient's tissue.
3. The pericardial thoracentesis and effusion drainage device according to claim 1, characterized in that, The extraction mechanism includes a tubing and a syringe, with the syringe connected to an external tube via the tubing.
4. The pericardial thoracentesis and effusion drainage device according to claim 3, characterized in that, The syringe and the tubing are connected by threads.
5. The pericardial thoracentesis and effusion drainage device according to claim 1, characterized in that, The extraction mechanism includes a collection bag, which is connected to an external tube.
Citation Information
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