A thoracentesis drainage device

Abstract

This invention discloses a thoracentesis drainage device. It includes a puncture assembly, a fixation plate, and a drainage tube, which are detachably connected. The puncture assembly includes a handle, a puncture rod slidably connected to the handle, and a puncture head located at the distal end of the puncture rod. The fixation plate includes an annular component, an inner sleeve, an outer sleeve, a shell, a flexible sealing ring, and a deformable sleeve. The inner sleeve allows the puncture rod or drainage tube to pass through. The outer sleeve and the deformable sleeve are fitted over the inner sleeve, with the two ends of the deformable sleeve fixed to the distal ends of the inner sleeve and the outer sleeve, respectively. The outer sleeve is divided into a fixed portion at the proximal end and an extension portion at the distal end. The annular component is fitted over the fixed portion of the outer sleeve and forms a rotatable connection with the outer sleeve. The flexible sealing ring is fitted between the proximal outer edge of the annular component and the proximal inner edge of the outer sleeve. This invention provides a device that is easy to operate, reliably fixed, and provides a good seal, improving surgical safety and efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a thoracentesis drainage device. Background Technology

[0002] Thoracentesis drainage devices are used clinically to drain pleural effusion or gas. Existing technologies include puncture drainage fixation structures, such as patent CN103463724B which uses an external tube that deforms and secures itself within the tissue. While these devices provide some fixation, the operation is often inconvenient, and the circumferential seal of the drainage tube is frequently imperfect. If a better seal is desired, the sealing ring can easily increase resistance during instrument removal or reinsertion, affecting the smoothness of the operation and surgical efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a thoracentesis drainage device.

[0004] The technical solution adopted in this invention is as follows: A thoracentesis drainage device includes a puncture assembly, a fixation plate, and a drainage tube, which are detachably connected. The puncture assembly includes a handle, a puncture rod slidably connected to the handle, and a puncture head located at the distal end of the puncture rod. The fixation plate includes an annular component, an inner sleeve, an outer sleeve, a housing, a flexible sealing ring, and a deformable sleeve. The inner sleeve is used for the puncture rod or drainage tube to pass through. The outer sleeve and the deformable sleeve are fitted over the inner sleeve, with the two ends of the deformable sleeve fixed to the distal ends of the inner sleeve and the outer sleeve, respectively. The outer sleeve is divided into a fixed portion located proximally and an extension portion located distally. The annular component is fitted over the fixed portion of the outer sleeve and forms a rotatable connection with the outer sleeve. The flexible sealing ring is fitted between the proximal outer edge of the annular component and the proximal inner edge of the outer sleeve. The housing is fitted over the annular component.

[0005] As a preferred embodiment of the present invention, the distal end of the handle is provided with an annular extension and an annular connecting portion. The distal end of the annular extension abuts against the proximal end of the inner sleeve to stably push the inner sleeve during puncture. The interior of the housing is provided with a plurality of slots corresponding to the hooks. The distal end of the annular connecting portion is provided with a plurality of hooks. The hooks cooperate with the slots to lock the handle and the housing in place, thereby realizing the rapid connection and separation of the puncture component and the fixing plate.

[0006] As a preferred embodiment of the present invention, the outer sleeve fixing part has a cavity, the proximal end of the inner sleeve is installed in the cavity, and a limiting edge is provided at the proximal end of the inner sleeve to provide travel space and limit for the axial movement of the inner sleeve; a sleeve spring is sleeved on the outside of the inner sleeve, one end of the sleeve spring contacts the limiting edge, and the other end contacts the cavity wall of the outer sleeve to provide a restoring elastic force for the inner sleeve and the deformable sleeve.

[0007] As a preferred embodiment of the present invention, a ratchet is formed on the outer edge of the distal end of the annular component, and a spiral spring is provided inside. The outer end of the spiral spring is fixedly connected to the inner wall of the annular component, and the inner end of the spiral spring is fixedly connected to the outer wall of the outer sleeve, so that the annular component can be locked in one direction and store rebound potential energy after rotation sealing.

[0008] In a preferred embodiment of the present invention, the housing is provided with an unlock button, and a pawl is hingedly installed inside the housing. The head of the pawl engages with the ratchet, and the tail of the pawl connects to the unlock button. When not unlocked, the pawl prevents the ratchet from reversing, thereby maintaining the sealing effect of the flexible sealing ring. Pressing the button releases the pawl from locking the ratchet.

[0009] As a preferred embodiment of the present invention, the pawl shaft is further provided with a pawl torsion spring for restoring the pawl to the state of engagement with the ratchet wheel, and the pawl can automatically reset to the locked state after the button is released.

[0010] As a preferred embodiment of the present invention, the puncture assembly further includes a puncture button and a linkage mechanism. The puncture button is disposed at the proximal end of the handle and connected to the linkage mechanism. The linkage mechanism is disposed inside the handle and connected to the puncture rod. The linkage mechanism is used to maintain the puncture rod in an extended state after the puncture button is pressed. An elastic element is disposed inside the handle. The elastic element is used to drive the linkage mechanism to contract and move the puncture rod proximally after the puncture head enters the body cavity.

[0011] As a preferred embodiment of the present invention, the thoracentesis drainage device further includes a removal assistant, which includes a limiting part and an insertion part. The size of the insertion part matches the proximal size of the inner sleeve so that the sleeve spring can be compressed when the fixing plate needs to be removed, so that the deformed sleeve can return to its contracted state and be safely removed.

[0012] As a preferred embodiment of the present invention, the deformable sleeve is made of a flexible material, and multiple axial slots are opened in the middle section circumferentially.

[0013] As a preferred embodiment of the present invention, the flexible sealing ring is an annular silicone sheet or a rubber sheet. When the annular part rotates relative to the outer sleeve, the flexible sealing ring undergoes wrinkling deformation to reduce the inner diameter.

[0014] The device of this invention has the advantages of simple operation, firm and reliable fixation after puncture, good sealing effect on the drainage tube, and easy safe removal afterward, thus improving the safety and efficiency of thoracentesis and drainage surgery. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the thoracentesis drainage device of the present invention during puncture. Figure 2 This is a cross-sectional view of the thoracentesis drainage device of the present invention; Figure 3 This is a partial sectional view of the fixation plate of the thoracentesis drainage device of the present invention; Figure 4 This is a top view of the internal structure of the fixation plate of the thoracentesis drainage device of the present invention; Figure 5 This is a schematic diagram of the structure of the thoracentesis drainage device of the present invention during removal; Figure 6 This is a schematic diagram of the thoracentesis drainage device of the present invention during drainage.

[0016] Reference numerals: handle 101, annular extension 1011, annular connection 1012, puncture button 102, linkage mechanism 103, puncture rod 104, puncture head 105, annular part 201, outer sleeve 202, housing 203, spiral spring 204, pawl 205, unlock button 206, flexible sealing ring 207, inner sleeve 208, deformable sleeve 209, sleeve spring 210, drainage tube 3, and removal aid 4. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] like Figures 1 to 6 As shown, a thoracentesis drainage device includes a puncture assembly, a fixation plate, a drainage tube 3, and a retrieval assistant 4. The puncture assembly includes a handle 101, a puncture button 102, a linkage mechanism 103, a puncture rod 104, and a puncture head 105.

[0019] refer to Figure 2 The handle 101 forms a handheld part and has an internal cavity. The puncture button 102 is located at the proximal end of the handle 101 and is connected to the linkage mechanism 103. The linkage mechanism 103 is located in the cavity of the handle 101 and is used to lock the puncture rod 104 in the extended state when the puncture button 102 is pressed. One end of the linkage mechanism 103 is connected to the puncture button 102 and the other end is connected to the puncture rod 104. An elastic element is provided inside the handle 101 to automatically retract the linkage mechanism 103 after the puncture head 105 enters the body cavity. The proximal end of the puncture rod 104 is installed in the handle 101, and the distal end is connected to the puncture head 105. The puncture head 105 is used to puncture the body cavity wall. During the puncture, pressing the puncture button 102 extends the puncture rod 104 and keeps it in the extended position with the help of the linkage mechanism 103. When the puncture head 105 enters the body cavity, the linkage mechanism 103 automatically retracts, and the puncture rod 104 quickly retracts into the handle 101 to avoid further damage to the tissue.

[0020] The fixed plate includes an annular component 201, an outer sleeve 202, a housing 203, a spiral spring 204, a pawl 205, an unlocking button 206, a flexible sealing ring 207, an inner sleeve 208, and a deformable sleeve 209. The outer sleeve 202 is divided into a fixed part and an extension part, with the distal end of the fixed part connected to the proximal end of the extension part; a cavity is formed inside the fixed part.

[0021] An inner sleeve 208 is fitted over the puncture rod 104. The inner diameter of the inner sleeve 208 matches the outer diameter of the puncture rod 104, and the inner diameter of the extension of the outer sleeve 202 matches the outer diameter of the inner sleeve 208. The distal end of the inner sleeve 208 is longer than the distal end of the outer sleeve 202. The distal end of the inner sleeve 208 is fixedly connected to the distal end of the deformable sleeve 209, and the distal end of the outer sleeve 202 is fixedly connected to the proximal end of the deformable sleeve 209. The deformable sleeve 209 is made of elastic material, with multiple axial slits circumferentially opened in its middle section. As it is compressed or stretched, the central diameter of the deformable sleeve 209 will significantly expand or contract. A sleeve spring 210 is fitted over the inner sleeve 208, and the proximal end of the inner sleeve 208 has a protruding limiting edge. The sleeve spring 210 and the proximal end of the inner sleeve 208 are located within the cavity of the fixed part of the outer sleeve 202, and can move axially along the puncture rod 104 within the cavity. The proximal end of the sleeve spring 210 abuts against the limiting edge of the inner sleeve 208, and the distal end of the sleeve spring 210 abuts against the inner wall of the cavity of the fixing part of the outer sleeve 202; the sleeve spring 210 is in a compressed state when the deformable sleeve 209 is stretched.

[0022] The distal end of the handle 101 is provided with an annular extension 1011 and an annular connecting portion 1012, which are concentrically arranged. The annular extension 1011 is sleeved outside the puncture rod 104 and extends into the cavity of the outer sleeve 202 fixing portion, and the inner diameter of the annular extension 1011 matches the outer diameter of the puncture rod 104. The connection between the annular extension 1011 and the handle body is also provided with a transitional conical surface with a diameter decreasing from distal to proximal, and the distal end of the annular extension 1011 abuts against the proximal end of the inner sleeve 208. When the puncture rod 104 extends, the annular extension 1011 squeezes the inner sleeve 208, causing the sleeve spring 210 to compress. Under the pressure of the annular extension 1011, the inner sleeve 208 moves distally, causing the deformable sleeve 209 to be stretched, forming a contracted state that facilitates passage through human tissue. When the puncture rod 104 retracts, the sleeve spring 210 releases its elasticity, causing the inner sleeve 208 to move proximally. At this time, the deformable sleeve 209 is compressed, forming an expanded state that adheres to the inner side of the body cavity wall. Together with the outer sleeve 202 fixing part outside the body surface, it fixes the fixing plate to the body cavity wall.

[0023] The annular connecting part 1012 is sleeved outside the annular part 201, and the distal end of the annular connecting part 1012 is provided with several hooks. The housing 203 is sleeved outside the fixing part of the outer sleeve 202, and the distal end of the housing 203 is fixed to the distal end of the fixing part of the outer sleeve 202 by a groove. The housing 203 has several slots inside that correspond to the hooks, and the hooks cooperate with the slots to fix the handle 101 to the housing 203. Pressing the hooks can disengage the handle 101 from the housing 203.

[0024] refer to Figure 5 The extraction aid 4 includes a limiting part and an insertion part. The diameter of the insertion part matches the proximal dimension of the inner sleeve 208, and the length of the insertion part is not less than the compressible length of the sleeve spring 210, so that the extraction aid 4 can smoothly push the inner sleeve 208 when inserted into the cavity of the fixing part of the outer sleeve 202. After puncture and fixation, press the hook to withdraw the puncture assembly. At this time, the deformable sleeve 209 remains in an expanded state; the drainage tube 3 is inserted into the body cavity through the inner sleeve 208 for drainage.

[0025] The annular component 201 is fitted inside the annular connecting portion 1012 and outside the fixing portion of the outer sleeve 202. The flexible sealing ring 207 is an annular silicone sheet, with the outer ring fitted around the proximal outer edge of the annular component 201 and the inner ring fitted around the proximal inner edge of the outer sleeve 202. The proximal outer wall of the annular component 201 has axial concave and convex stripes to increase friction and facilitate twisting when removing the puncture assembly. When the annular component 201 is twisted, it causes the outer ring of the flexible sealing ring 207 to twist relative to the inner ring, resulting in a chrysanthemum-shaped wrinkle deformation in the flexible sealing ring 207. Figure 6 After deformation, the inner ring shrinks due to the appearance of wrinkles, firmly wrapping the drainage tube 3 through which it passes, thereby achieving a sealing and fixing effect. After the drainage operation is completed, the drainage tube 3 is removed, and the removal auxiliary device 4 is inserted into the cavity of the fixing part of the outer sleeve 202. The annular extension 1011 squeezes the inner sleeve 208, causing the sleeve spring 210 to compress. The deformable sleeve 209 returns to a contracted state that facilitates passage through human tissue, and the fixing plate can then be removed.

[0026] refer to Figure 3 and Figure 4 A ratchet is machined on the outer edge of the distal end of the annular part 201, and a spiral spring 204 is provided inside the distal end of the annular part 201; the outer end of the spiral spring 204 is fixed to the inner wall of the annular part 201, and the inner end is fixed to the outer wall of the outer sleeve 202.

[0027] The housing 203 is equipped with an unlock button 206 and a pawl 205. The head of the pawl 205 engages with the ratchet of the annular component 201, and the tail of the pawl 205 connects to the unlock button 206. When the annular component 201 is twisted, the ratchet rotates, and the head of the pawl 205 restricts the ratchet from rotating in the opposite direction. When the unlock button 206 is pressed, the pawl 205 rotates along its own axis, and the head disengages from the ratchet of the annular component 201. The annular component 201 rotates under the elastic action of the spiral spring 204, restoring the flexible sealing ring 207 to a flat state. A pawl torsion spring is also provided at the pawl 205 to return the pawl 205 to the state of engagement with the ratchet.

[0028] Based on the aforementioned structure, the operation process of this thoracentesis drainage device is as follows.

[0029] 1) Before puncture, the puncture assembly and the fixing plate are engaged and fixed with the slot in the housing 203 via the hook on the annular connecting part 1012. The operator holds the handle 101, aligns the puncture head 105 with the puncture site, and presses the puncture button 102. The linkage mechanism 103 locks the puncture rod 104, causing it to extend forward, thus completing the puncture. After the puncture head 105 enters the body cavity, the elastic element in the handle 101 unlocks the linkage mechanism 103. Under the action of the elastic element, the puncture rod 104 automatically and quickly retracts into the handle 101. At the same time, due to the rearward movement of the annular extension 1011 at the distal end of the handle 101, the sleeve spring 210 is released elastically, pushing the inner sleeve 208 to move backward and compressing the deformable sleeve 209 to anchor it to the inner side of the body cavity wall.

[0030] 2) Press the hook on the handle 101 to remove the entire puncture assembly from the fixed plate. Insert the drainage tube 3 into the body cavity through the inner sleeve 208; rotate the annular part 201 on the fixed plate. The annular part 201 drives the outer ring of the flexible sealing ring 207 to rotate relative to the inner ring. The flexible sealing ring 207 wrinkles and deforms, thus tightening and sealing the drainage tube 3. During this process, the pawl 205 engages with the ratchet on the annular part 201 to prevent the annular part 201 from reversing, achieving one-way locking. Drainage can then begin.

[0031] 3) After drainage is completed, press the unlock button 206 on the housing 203 to disengage the pawl 205 from the ratchet. The annular part 201 rotates under the action of the spiral spring 204, and the flexible sealing ring 207 returns to a flat and relaxed state, thereby releasing the locking and sealing of the drainage tube 3 and allowing the drainage tube 3 to be pulled out. Insert the insertion part of the removal aid 4 along the cavity of the outer sleeve 202, push the inner sleeve 208 to the distal end, and compress the sleeve spring 210 again, causing the deformable sleeve 209 to be stretched and thinned, so that the entire fixed plate can be safely removed from the puncture channel.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any brief modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A thoracentesis drainage device, characterized in that, The device includes a puncture assembly, a fixation plate, and a drainage tube, which are detachably connected. The puncture assembly includes a handle, a puncture rod slidably connected to the handle, and a puncture head located at the distal end of the puncture rod. The fixation plate includes an annular component, an inner sleeve, an outer sleeve, a housing, a flexible sealing ring, and a deformable sleeve. The inner sleeve is used for the puncture rod or drainage tube to pass through. The outer sleeve and the deformable sleeve are fitted over the inner sleeve, with the two ends of the deformable sleeve fixed to the distal ends of the inner sleeve and the outer sleeve, respectively. The outer sleeve is divided into a fixed portion at the proximal end and an extension portion at the distal end. The annular component is fitted over the fixed portion of the outer sleeve and forms a rotatable connection with the outer sleeve. The flexible sealing ring is fitted between the proximal outer edge of the annular component and the proximal inner edge of the outer sleeve. The housing is fitted over the annular component. A ratchet is formed at the distal outer edge of the annular component, and a spiral spring is provided inside. The outer end of the spiral spring is fixedly connected to the inner wall of the annular component, and the inner end of the spiral spring is fixedly connected to the outer wall of the outer sleeve. An unlocking button is provided on the housing, and a pawl is hingedly installed inside the housing. The head of the pawl engages with the ratchet, and the tail of the pawl connects with the unlocking button. The flexible sealing ring is an annular silicone sheet or a rubber sheet. When the annular component rotates relative to the outer sleeve, the flexible sealing ring wrinkles and deforms to reduce its inner diameter.

2. The thoracentesis drainage device as described in claim 1, characterized in that, The handle has an annular extension and an annular connecting part at its distal end, and the distal end of the annular extension abuts against the proximal end of the inner sleeve; the housing has a number of slots corresponding to the hooks inside, and the distal end of the annular connecting part has a number of hooks, and the hooks cooperate with the slots to lock the handle and the housing in place.

3. The thoracentesis drainage device according to claim 1, characterized in that, The outer sleeve fixing part has a cavity, the proximal end of the inner sleeve is installed in the cavity, and a limiting edge is provided at the proximal end of the inner sleeve; a sleeve spring is sleeved on the outside of the inner sleeve, one end of the sleeve spring contacts the limiting edge, and the other end contacts the cavity wall of the outer sleeve.

4. The thoracentesis drainage device according to claim 1, characterized in that, The pawl shaft is also equipped with a pawl torsion spring for restoring the pawl to its engaged position with the ratchet.

5. The thoracentesis drainage device according to claim 1, characterized in that, The puncture assembly further includes a puncture button and a linkage mechanism. The puncture button is located at the proximal end of the handle and connected to the linkage mechanism. The linkage mechanism is located inside the handle and connected to the puncture rod. The linkage mechanism is used to keep the puncture rod in an extended state after the puncture button is pressed. An elastic element is provided inside the handle. The elastic element is used to drive the linkage mechanism to contract and move the puncture rod proximally after the puncture head enters the body cavity.

6. The thoracentesis drainage device according to claim 1, characterized in that, The thoracentesis drainage device also includes a retrieval assistant, which includes a limiting part and an insertion part, the size of which matches the proximal size of the inner sleeve.

7. The thoracentesis drainage device according to claim 1, characterized in that, The deformable sleeve is made of flexible material, with multiple axial slots opened in the middle section.

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