Thoracic catheter drainage assembly

Abstract

The present disclosure relates to the technical field of medical equipment, and provides a chest tube drainage assembly. The chest tube drainage assembly comprises a hard outer tube, a soft inner tube, a movable plate and a locking rod. The hard outer tube comprises a connected in-vivo section and an in-vitro section, and the side wall of the in-vivo section is provided with a through hole. The movable plate is movably arranged in the through hole. The movable plate comprises a first position and a second position. When the movable plate is in the first position, the movable plate is located in the hard outer tube and abuts against the soft inner tube. When the movable plate is in the second position, at least part of the movable plate penetrates out of the through hole. The locking rod is movably arranged on the inner side of the hard outer tube. One end of the movable plate, which is away from the in-vitro section, is provided with a locking notch. The locking rod comprises an unlocking position and a locking position. When the locking rod is in the locking position, at least part of the locking rod is located in the locking notch. The chest tube drainage assembly provided by the present disclosure can reduce the occurrence of lung tissue damage.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to a chest tube drainage assembly. Background Technology

[0002] In current clinical practice, percutaneous puncture and catheter placement are often required to drain abnormally accumulated gas or fluid in order to restore normal thoracic function. Generally, a chest drainage tube with a stylet is used.

[0003] The chest drainage tube with a stylet is pre-filled with a metal / polymer solid / hollow stylet. The stylet can straighten the drainage tube, ensuring sufficient rigidity during insertion. This allows for easy pushing of the drainage tube into the chest cavity after puncture. Once in place, the stylet can be withdrawn to complete the insertion without the need for additional skin dilation.

[0004] However, certain risks of complications still exist, which can be life-threatening in severe cases. There are many procedural risks, the greatest being serious lung-related complications such as pneumothorax / hemopneumothorax. Improper insertion, such as inserting the tube too deeply, can damage lung tissue with the rigid stylet, leading to pneumothorax, hemothorax, etc., causing sudden chest pain and worsening breathing difficulties. In severe cases, re-insertion or surgery may be necessary. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a chest tube drainage assembly.

[0006] This application provides a chest tube drainage assembly, comprising: a rigid external tube including a connected internal segment and an external segment, the internal segment having a through-hole on its side wall; a flexible internal tube movably inserted within the rigid external tube; and a movable plate movably disposed at the through-hole, the movable plate having a first position and a second position. In the first position, the movable plate is located within the rigid external tube and abuts against the flexible internal tube, the movable plate engaging with the inner wall of the rigid external tube to clamp the flexible internal tube; in the second position, at least a portion of the movable plate protrudes through the through-hole. A locking rod is movably disposed inside the rigid outer tube and located on the side of the movable plate opposite to the outer section. A locking notch is provided at the end of the movable plate opposite to the outer section. When the movable plate is in a first position, the locking notch is opposite to the locking rod. The locking rod includes an unlocked position and a locked position. When the locking rod is in the unlocked position, it is located outside the locking notch. When the locking rod is in the locked position, at least a portion of the locking rod is located within the locking notch, fixing the movable plate in the first position.

[0007] According to the chest tube drainage assembly provided in this application embodiment, the chest tube drainage assembly provided in this application is placed in the chest position. At this time, the movable plate is in the first position, the locking rod is in the locked position, and the positions of the soft inner tube and the rigid outer tube are fixed. A pushing force is applied to the rigid outer tube, so that the chest tube drainage assembly enters the patient's chest cavity tissue. When the free end of the rigid outer tube away from the external segment extends into the chest cavity, the locking rod moves from the locked position to the unlocked position, and the movable plate moves from the first position to the second position, so that the movable plate abuts against the outside of the ribs outside the chest cavity, preventing the rigid outer tube from continuing to penetrate deeper into the chest cavity. At this time, the soft inner tube separates from the rigid outer tube, and the soft inner tube continues to move towards the chest cavity to reach the target position for drainage.

[0008] Therefore, by setting up a movable plate that abuts against the outside of the ribs outside the thoracic cavity, the rigid external tube is prevented from moving further into the thoracic cavity, thus avoiding damage to lung tissue due to excessive insertion and reducing the occurrence of serious complications such as pneumothorax and hemothorax.

[0009] In one possible implementation of this application, the chest tube drainage assembly further includes an elastic element disposed inside the rigid external tube, one end of the elastic element being connected to the inner wall of the rigid external tube and the other end being connected to the locking rod, the elastic element always applying a force to the locking rod toward the external segment.

[0010] In one possible implementation of this application, the thoracic tube drainage assembly further includes: an insertion rod, wherein the side wall of the internal segment is provided with an insertion interface, the insertion interface is located on the side of the through-hole opposite to the external segment, the insertion rod is insertably inserted into the insertion interface, and a portion of the insertion rod can extend into the interior of the rigid external tube; when the locking rod is in the locked position, the insertion rod can abut against the end of the locking rod opposite to the locking notch, and the distance between the end of the locking rod opposite to the movable plate and the free end of the internal segment is less than the length of the locking rod extending into the locking notch.

[0011] In one possible implementation of this application, a pull ring is provided at the end of the plug rod facing away from the plug interface.

[0012] In one possible implementation of this application, the movable plate is provided with a first connecting part at one end near the outer segment, and the through-hole is provided with a second connecting part on the inner wall of one side near the outer segment. The first connecting part and the second connecting part are rotatably connected so that the movable plate can switch between the first position and the second position.

[0013] In one possible implementation of this application, a torsion spring is provided between the first connecting portion and the second connecting portion, and the torsion spring always applies a force to the movable plate toward the second position.

[0014] In one possible implementation of this application, the thoracic tube drainage assembly further includes: an abutment block disposed on the inner wall of the internal segment and opposite to the penetration opening; when the movable plate is in the first position, the movable plate is located inside the rigid outer tube and abuts against the soft inner tube, and the movable plate and the abutment block cooperate to clamp the soft inner tube.

[0015] In one possible implementation of this application, the movable plate includes an abutment surface facing the abutment block, and when the movable plate is in a first position, the abutment surface abuts against the soft inner tube.

[0016] In one possible implementation of this application, the abutting surface is provided with an abutting protrusion, which protrudes from a portion of the abutting surface toward the abutting block.

[0017] In one possible implementation of this application, the number of abutting protrusions is multiple, and the multiple abutting protrusions are spaced apart.

[0018] In one possible implementation of this application, the abutment block includes a guide surface facing the outer segment, and the guide surface is inclined toward the through opening in the direction from the outer segment toward the inner segment. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a chest tube drainage assembly provided in some embodiments of this application; Figure 2 for Figure 1 Enlarged view of point A shown in the image; Figure 3 for Figure 1 The diagram shows the movable plate of the chest tube drainage assembly in the first position; Figure 4 for Figure 3 Enlarged view of point B shown; Figure 5 for Figure 1 The diagram shows the movable plate of the chest tube drainage assembly in the second position; Figure 6for Figure 5 The enlarged view of point C shown in the image.

[0022] Figure label: 100. Chest tube drainage assembly; 110. Rigid outer tube; 111. Inner section; 112. Outer section; 113. Penetration port; 114. Insertion port; 120. Soft inner tube; 130. Abutment block; 131. Guide surface; 140. Movable plate; 141. First connecting part; 142. Locking notch; 143. Abutment surface; 144. Abutment protrusion; 150. Locking rod; 160. Elastic element; 170. Insertion rod; 171. Pull ring. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0025] In current clinical practice, percutaneous puncture and catheterization are often required to drain abnormally accumulated gas or fluid in order to restore normal thoracic function. Generally, a chest drainage tube with a stylet is used.

[0026] The chest drainage tube with a stylet is pre-filled with a metal / polymer solid / hollow stylet. The stylet can straighten the drainage tube, ensuring sufficient rigidity during insertion. This allows for easy pushing of the drainage tube into the chest cavity after puncture. Once in place, the stylet can be withdrawn to complete the insertion without the need for additional skin dilation.

[0027] However, certain risks of complications still exist, which can be life-threatening in severe cases. There are many procedural risks, the greatest being serious lung-related complications such as pneumothorax / hemopneumothorax. Improper insertion, such as inserting the tube too deeply, can damage lung tissue with the rigid stylet, leading to pneumothorax, hemothorax, etc., causing sudden chest pain and worsening breathing difficulties. In severe cases, re-insertion or surgery may be necessary.

[0028] To resolve the above technical issues, please refer to Figures 1 to 6 This application provides a chest tube drainage assembly 100, which may include a rigid outer tube 110, a soft inner tube 120, an abutment block 130, a movable plate 140, and a locking rod 150.

[0029] Specifically, the rigid external tube 110 can be made of metal, such as stainless steel or nickel-titanium alloy. The rigid external tube 110 is formed into a cylindrical tubular structure. In the extension direction of the rigid external tube 110, there are connected internal segment 111 and external segment 112. The internal segment 111 and external segment 112 can be integrally formed. During the operation of the chest tube drainage assembly 100, the free end of the internal segment 111 faces the patient's target treatment area. When the rigid external tube 110 is inserted into the patient's tissue and reaches the target position, the internal segment 111 is inside the patient's body and the external segment 112 is outside the patient's body.

[0030] It is understandable that the length of the rigid external tube 110 inserted into the target position varies depending on the patient's physique, and the part of the internal segment 111 near the external segment 112 can also be located outside the patient's body.

[0031] Furthermore, the inner wall of the inner segment 111 is provided with a through-hole 113. Specifically, the through-hole 113 is located near the free end of the inner segment 111. The distance between the inner wall of the through-hole 113 near the free end of the inner segment 111 and the free end of the inner segment 111 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0032] In the specific implementation process, the through-hole 113 is formed as an elongated hole. The length direction of the through-hole 113 is consistent with the extension direction of the rigid outer tube 110. The distance between the inner wall of the through-hole 113 near the free end of the inner section 111 and the free end of the inner section 111 can be 1mm, 1.5mm or 2mm, etc.

[0033] Of course, in order to enable the rigid outer tube 110 to penetrate the patient's skin and tissues, the free end of the inner segment 111 can be formed into a beveled sharp blade structure.

[0034] The outer diameter of the flexible inner tube 120 is smaller than the outer diameter of the rigid outer tube 110, and the flexible inner tube 120 is movably inserted inside the rigid outer tube 110. The material of the flexible inner tube 120 can be polytetrafluoroethylene, Teflon, etc.

[0035] The abutment block 130 is disposed on the inner wall of the inner section 111 and is disposed opposite to the through opening 113. The abutment block 130 can be formed into a rectangular block shape, and the surface of the abutment block 130 facing the through opening 113 can be formed into an arc-shaped surface that is compatible with the soft inner tube 120.

[0036] Furthermore, the abutment block 130 includes a guide surface 131 facing the outer section 112. In the direction from the outer section 112 to the inner section 111, the guide surface 131 is inclined toward the through opening 113. It should be noted that when the soft inner tube 120 is inserted into the hard outer tube 110 and the insertion operation continues, by setting the guide surface 131 at an inclination, the soft inner tube 120 can pass through the inner section 111 along the inclined guide surface 131 and continue to move toward the free end of the inner section 111, which can avoid the abutment block 130 blocking the movement of the soft inner tube 120.

[0037] The movable plate 140 is movably disposed in the through-hole 113. The movable plate 140 includes a first position and a second position. When the movable plate 140 is in the first position, the movable plate 140 is located inside the rigid outer tube 110 and abuts against the flexible inner tube 120. The movable plate 140 cooperates with the abutment block 130 to clamp the flexible inner tube 120. When the movable plate 140 is in the second position, at least a portion of the movable plate 140 protrudes out of the through-hole 113.

[0038] The locking rod 150 is movably disposed inside the rigid outer tube 110 and is located on the side of the movable plate 140 away from the outer section 112. The end of the movable plate 140 away from the outer section 112 is provided with a locking notch 142. When the movable plate 140 is in the first position, the locking notch 142 is opposite to the locking rod 150. The locking lever 150 includes an unlocked position and a locked position. When the locking lever 150 is in the unlocked position, the locking lever 150 is located outside the locking notch 142. When the locking lever 150 is in the locked position, at least a portion of the locking lever 150 is located inside the locking notch 142, thus fixing the movable plate 140 in the first position.

[0039] It should be noted that when medical staff need to perform chest drainage on a patient, the chest tube drainage assembly 100 provided in this application is placed in the chest position. At this time, the movable plate 140 is in the first position, the locking rod 150 is in the locked position, and the positions of the soft inner tube 120 and the rigid outer tube 110 are fixed. A pushing force is applied to the rigid outer tube 110 so that the chest tube drainage assembly 100 enters the patient's chest cavity tissue. When the free end of the rigid outer tube 110 away from the external segment 112 extends into the chest cavity, the locking rod 150 moves from the locked position to the unlocked position, and the movable plate 140 moves from the first position to the second position, so that the movable plate 140 abuts against the outside of the ribs outside the chest cavity, preventing the rigid outer tube 110 from continuing to penetrate deeper into the chest cavity. At this time, the soft inner tube 120 separates from the rigid outer tube 110, and the soft inner tube 120 continues to move towards the chest cavity to reach the target position for drainage.

[0040] Therefore, by setting up a movable plate 140 that abuts against the outside of the ribs outside the thoracic cavity, the rigid external tube 110 is prevented from continuing to move into the thoracic cavity, thus avoiding damage to lung tissue due to excessive insertion of the rigid external tube 110 and reducing the occurrence of serious complications such as pneumothorax and hemothorax.

[0041] In some embodiments of this application, the movable plate 140 is provided with a first connecting part 141 at one end near the external section 112, and the through opening 113 is provided with a second connecting part on the inner wall of one side near the external section 112. The first connecting part 141 and the second connecting part are rotatably connected so that the movable plate 140 can switch between a first position and a second position.

[0042] Specifically, the movable plate 140 is formed in the shape of a fan. The smaller end of the fan-shaped movable plate 140 is located close to the external section 112. Through the rotation between the first connecting part 141 and the second connecting part, the larger end of the fan-shaped movable plate 140 can extend out of the through-hole 113 to achieve contact with the outside of the rib.

[0043] Furthermore, a torsion spring is provided between the first connecting part 141 and the second connecting part, and the torsion spring always applies a force to the movable plate 140 to move toward the second position.

[0044] Specifically, the first connecting part 141 is formed as a rotating column, and the second connecting part is formed as a rotating groove. The rotating groove is rotatably sleeved on the rotating column. The torsion spring includes a torsion spring body, a first pin, and a second pin. The torsion spring body is sleeved on the rotating column, the first pin is fixed to the rotating column, and the second pin extends out and abuts against the inner wall of the rigid outer tube 110, so as to apply a force to the movable plate 140 to rotate from the first position to the second position through the torsion spring.

[0045] In some embodiments of this application, the movable plate 140 further includes an abutment surface 143 facing the abutment block 130, and when the movable plate 140 is in the first position, the abutment surface 143 abuts against the soft inner tube 120.

[0046] Therefore, by setting the contact surface 143, the surface contact between the movable plate 140 and the soft inner tube 120 is achieved, the friction between the movable plate 140 and the soft inner tube 120 is increased, and the stability of the fixed connection between the soft inner tube 120 and the hard outer tube 110 is ensured.

[0047] Furthermore, the abutting surface 143 is provided with an abutting protrusion 144, which protrudes from a portion of the abutting surface 143 toward the abutting block 130.

[0048] Furthermore, there are multiple abutment protrusions 144, which are spaced apart. Thus, by providing multiple abutment protrusions 144, the roughness of the abutment surface 143 can be further improved, and the friction between the movable plate 140 and the flexible inner tube 120 can be further improved.

[0049] In one embodiment of this application, the chest tube drainage assembly 100 further includes an elastic element 160, which is disposed inside the rigid external tube 110. One end of the elastic element 160 is connected to the inner wall of the rigid external tube 110, and the other end is connected to the locking rod 150. The elastic element 160 always applies a force to the locking rod 150 toward the external segment 112.

[0050] Among them, the elastic element 160 can be a spring.

[0051] In other words, the force applied by the elastic element 160 to the locking rod 150 is used to drive the locking rod 150 from the locked position to the unlocked position, so that the locking rod 150 leaves the locking notch 142, and the movable plate 140 disengages from the locking rod 150.

[0052] Taking the connection between the movable plate 140 and the through-hole 113 via a torsion spring as an example, when the locking rod 150 moves from the locked position to the unlocked position, the movable plate 140 can move from the first position to the second position under the action of the torsion spring, thereby separating the soft inner tube 120 from the hard outer tube, providing support to the outside of the ribs, and preventing the hard outer tube 110 from extending too deep into the chest cavity.

[0053] In some embodiments of this application, the thoracic tube drainage assembly 100 may further include a connector 170, and the side wall of the internal segment 111 is also provided with a connector 114. The connector 114 is located on the side of the through-hole 113 away from the external segment 112. The connector 170 is inserted and detachably inserted into the connector 114, and a portion of the connector 170 can extend into the interior of the rigid external tube 110. When the locking rod 150 is in the locked position, the connector 170 can abut against the end of the locking rod 150 away from the locking notch 142. The distance between the end of the locking rod 150 away from the movable plate 140 and the free end of the internal segment 111 is less than the length of the locking rod 150 extending into the locking notch 142.

[0054] It should be noted that the insertion interface 114 penetrates the side wall of the rigid outer tube 110, and the insertion rod 170 can be formed as a wedge-shaped rod, with the smaller cross-section end passing through the insertion interface 114 and extending into the interior of the rigid outer tube 110, abutting against the end of the locking rod 150 opposite to the locking notch 142.

[0055] In this way, when medical personnel need to use the chest drainage tube assembly, they first align the chest drainage tube assembly with the patient's chest cavity, and then pull out the insertion rod 170. At this time, under the action of the elastic element 160, the locking rod 150 moves toward the free end of the inner section 111 until the locking rod 150 contacts the patient's skin. At this time, since the distance between the end of the locking rod 150 away from the movable plate 140 and the free end of the inner section 111 is less than the length of the locking rod 150 extending into the locking notch 142, part of the locking rod 150 is still located in the locking notch 142, and the locking rod 150 can still fix the movable plate 140.

[0056] Specifically, taking a distance of 1mm between the locking rod 150 and the free end of the internal segment 111, and a length of 1.5mm in which the locking rod 150 penetrates the locking notch 142, as an example, when the locking rod 150 contacts the skin outside the patient's chest cavity, the locking rod 150 still extends into the locking notch 142, and the locking rod 150 can still fix the movable plate 140 in the first position.

[0057] Before the thoracic tube drainage assembly 100 is inserted into the thoracic cavity, the free end of the inner segment 111 is constantly compressed by muscle tissue, the position of the locking rod 150 remains unchanged, and the movable plate 140 remains in the first position. When the thoracic tube drainage assembly 100 is inserted into the thoracic cavity, the pressure at the free end of the inner segment 111 disappears. Under the action of the elastic element 160, the locking rod 150 continues to move toward the free end of the inner segment 111 until the locking rod 150 moves to the unlocked position, causing the movable plate 140 to separate from the locking rod 150. The movable plate 140 moves from the first position to the second position. At this time, the movable plate 140 can support the outside of the ribs outside the thoracic cavity, providing support for the rigid external tube 110 and preventing the rigid external tube 110 from continuing to penetrate deeper into the thoracic cavity.

[0058] Meanwhile, the soft inner tube 120 can continue to penetrate deeper into the thoracic cavity for drainage.

[0059] It should be explained that, in the specific implementation process, the diameter of the rigid outer tube 110 can be between 4 mm and 10 mm. When the locking rod 150 is in the unlocked position, part of the locking rod 150 extends out of the head end of the rigid outer tube 110. The extended part of the locking rod 150 is within 1 mm to avoid damage to the tissues inside the thoracic cavity during the movement of the locking rod 150.

[0060] In some embodiments of this application, a pull ring 171 is provided at the end of the plug rod 170 facing away from the plug interface 114. Thus, by providing the pull ring 171, medical personnel can easily pull the plug rod 170 out of the plug hole.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A chest tube drainage assembly, characterized in that, include: A rigid outer tube, comprising a connected inner section and an outer section, wherein the side wall of the inner section is provided with a through opening; A flexible inner tube, which is movably inserted into the rigid outer tube; A movable plate is movably disposed in the through-hole. The movable plate has a first position and a second position. When the movable plate is in the first position, it is located inside the rigid outer tube and abuts against the flexible inner tube. The movable plate cooperates with the inner wall of the rigid outer tube to clamp the flexible inner tube. When the movable plate is in the second position, at least a portion of the movable plate protrudes through the through-hole. A locking rod is movably disposed inside the rigid outer tube and located on the side of the movable plate away from the outer section. The end of the movable plate away from the outer section is provided with a locking notch. When the movable plate is in the first position, the locking notch is opposite to the locking rod. The locking rod includes an unlocked position and a locked position. When the locking rod is in the unlocked position, it is located outside the locking notch. When the locking rod is in the locked position, at least a portion of it is located inside the locking notch, thus fixing the movable plate in the first position.

2. The chest tube drainage assembly according to claim 1, characterized in that, Also includes: An elastic element is disposed inside the rigid outer tube. One end of the elastic element is connected to the inner wall of the rigid outer tube, and the other end is connected to the locking rod. The elastic element always applies a force to the locking rod toward the outer section of the body.

3. The chest tube drainage assembly according to claim 1, characterized in that, Also includes: The inner section of the tube has a plug-in rod, and the side wall of the inner section is also provided with a plug-in interface. The plug-in interface is located on the side of the through-hole opposite to the outer section. The plug-in rod is pluggably inserted into the plug-in interface, and a part of the plug-in rod can extend into the interior of the rigid outer tube. When the locking rod is in the locked position, the plug rod can abut against the end of the locking rod away from the locking notch, and the distance between the end of the locking rod away from the movable plate and the free end of the inner section is less than the length of the locking rod extending into the locking notch.

4. The thoracic tube drainage assembly according to claim 3, characterized in that, The end of the plug rod facing away from the plug interface is provided with a pull ring.

5. The thoracic tube drainage assembly according to claim 1, characterized in that, The movable plate is provided with a first connecting part at one end near the outer section, and the through opening is provided with a second connecting part on the inner wall of one side near the outer section. The first connecting part and the second connecting part are rotatably connected so that the movable plate can switch between the first position and the second position.

6. The thoracic tube drainage assembly according to claim 5, characterized in that, A torsion spring is provided between the first connecting part and the second connecting part, and the torsion spring always applies a force to the movable plate toward the second position.

7. The chest tube drainage assembly according to claim 1, characterized in that, Also includes: An abutment block is disposed on the inner wall of the inner body section and is opposite to the through opening; When the movable plate is in the first position, the movable plate is located inside the rigid outer tube and abuts against the soft inner tube. The movable plate and the abutting block cooperate to clamp the soft inner tube.

8. The chest tube drainage assembly according to claim 7, characterized in that, The movable plate includes an abutting surface facing the abutting block, and when the movable plate is in the first position, the abutting surface abuts against the soft inner tube.

9. The thoracic tube drainage assembly according to claim 8, characterized in that, The abutting surface is provided with abutting protrusions, which protrude from a portion of the abutting surface toward the abutting block.

10. The thoracic tube drainage assembly according to claim 7, characterized in that, The abutment block includes a guide surface facing the outer segment, and the guide surface is inclined toward the through-hole in the direction from the outer segment toward the inner segment.

Images