A drainage device for cardiothoracic surgery

Abstract

The application discloses a drainage device for cardiothoracic surgery and belongs to the technical field of medical devices. The drainage device comprises a drainage device main body, the drainage device main body comprises a drainage tube, a fixing assembly is arranged on the part of the drainage tube close to the chest wall in a sleeving mode, the fixing assembly comprises a sticking plate, the sticking plate is provided with a first notch extending from the middle part to one side surface, the middle part of the sticking plate is provided with a rotating seat, one end of the rotating seat is fixed to the sticking plate, the other end of the rotating seat is provided with a spherical groove, the rotating seat is provided with a second notch extending outward from the middle part, the spherical groove is provided with a hollow ball head, the ball head is connected to the spherical groove in a universal mode, the outer wall of the ball head is provided with a third notch, the part of the ball head outside the rotating seat is provided with a lower connecting pipe, and the outer wall of the lower connecting pipe is provided with a first outer thread. The technical scheme is used to improve the connection stability of the drainage tube and the thoracic cavity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a drainage device for cardiothoracic surgery. BACKGROUND

[0002] After cardiothoracic surgery (such as pulmonary lobectomy, esophageal cancer radical resection, mediastinal tumor resection, etc.), there are often residual fluid, blood and gas in the chest cavity. If not promptly drained, it can lead to complications such as accumulation of fluid in the chest cavity, compression of lung tissue, and displacement of the mediastinum. In severe cases, it can cause respiratory and circulatory dysfunction, endangering the patient's life. Therefore, after surgery, the fluid, blood and gas in the chest cavity need to be continuously drained through a drainage device to maintain a negative pressure environment in the chest cavity, promote lung recruitment, reduce the risk of infection, and lay the foundation for postoperative recovery of the patient.

[0003] Currently, the commonly used cardiothoracic surgery drainage device in clinical practice mainly consists of a drainage tube, a drainage bottle (or a drainage bag), a connecting pipeline, and a negative pressure regulating assembly. Among them, the drainage tube, as the core component, needs to be placed into the patient's chest cavity through a surgical incision or a puncture hole, and its outer end is connected to the drainage bottle through the connecting pipeline, relying on the difference between the negative pressure in the chest cavity and the gravity of the drainage device to achieve drainage. However, the existing drainage device still has many problems to be solved in clinical application, especially the insufficient connection stability of the drainage tube and the chest cavity, which is easily disconnected under external force, becoming a key hidden danger affecting the drainage effect and causing medical risks. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a drainage device for cardiothoracic surgery to improve the connection stability of the drainage tube and the chest cavity.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The application discloses a drainage device for cardiothoracic surgery, which comprises a drainage device main body, wherein the drainage device main body comprises a drainage tube, a fixing assembly is arranged on the part close to the chest wall of the drainage tube, the fixing assembly comprises a sticking plate, the sticking plate is provided with a first notch extending from the middle part to one side, the middle part of the sticking plate is provided with a rotating seat, one end of the rotating seat is fixed to the sticking plate, the other end of the rotating seat is provided with a spherical groove, the rotating seat is provided with a second notch extending outward from the middle part, the spherical groove is provided with a hollow ball head, the ball head is connected to the spherical groove in a universal manner, the outer wall of the ball head is provided with a third notch, the part of the ball head outside the rotating seat is provided with a lower connecting pipe, the outer wall of the lower connecting pipe is provided with a first external thread, the outer wall of the lower connecting pipe is provided with a fourth notch, the lower connecting pipe is sleeved with a middle connecting pipe, the inner wall of one end of the middle connecting pipe towards the lower connecting pipe is provided with a first internal thread, the first internal thread is threadedly connected to the first external thread, the outer wall of the middle connecting pipe is provided with a fifth notch, the outer wall of the middle connecting pipe is provided with a mounting ring, the mounting ring is fixed to the middle connecting pipe, the mounting ring is provided with a sixth notch corresponding to the position of the fifth notch, the mounting ring is provided with an adhesive tape roll, the adhesive tape roll is detachably connected to the mounting ring, the part of the middle connecting pipe corresponding to the position of the adhesive tape roll is provided with a seventh notch, the adhesive tape on the adhesive tape roll enters the seventh notch and is wound and fixed to the surface of the drainage tube, the widths of the first notch, the second notch, the third notch, the fourth notch, the fifth notch, the sixth notch and the seventh notch are all greater than the diameter of the drainage tube, and when the middle connecting pipe is tightly fixed to the lower connecting pipe, the fourth notch and the fifth notch are arranged in a staggered mode.

[0007] Further, the mounting ring is provided with a lifting rod, the lifting rod is slidingly connected to the mounting ring, the lifting rod is provided with a fixing ring at the lower part of the mounting ring, the middle part of the fixing ring is fixed to the lifting rod, a supporting spring is arranged on the lifting rod and is arranged in a sleeved mode, and the two ends of the supporting spring are fixed to the fixing ring and the mounting ring respectively, the lifting rod is provided with a threaded section above the mounting ring, the threaded section is provided with an adjusting ring, the adjusting ring is threadedly connected to the threaded section, the adhesive tape roll is arranged on the threaded section and is located above the adjusting ring, and a locking nut is arranged on the threaded end above the adhesive tape roll and is threadedly connected to the threaded section.

[0008] Further, the seventh notch is arranged through the upper end of the middle connecting pipe, the rotating seat below the mounting ring is provided with a C-shaped guide block, the thickness of the C-shaped guide block gradually increases from the two ends to the middle part, the C-shaped guide block is arranged on the rotating path of the lifting rod, one end of the lifting rod in contact with the C-shaped guide block is provided with a roller, and the diameter of the roller is greater than the width of the second notch.

[0009] Further, an end of the middle connecting pipe away from the lower connecting pipe is provided with a second external thread, an upper connecting pipe is sleeved on the middle connecting pipe, an end of the upper connecting pipe towards the middle connecting pipe is provided with a second internal thread, the second internal thread is threadedly connected to the second external thread, a side of the upper connecting pipe is provided with an eighth notch, the fifth notch and the eighth notch are staggered when the upper connecting pipe is tightly fixed to the middle connecting pipe, at least two groups of buffer assemblies are arranged on the outer wall of the upper connecting pipe, the two groups of buffer assemblies are oppositely arranged and arranged at different heights, and the two groups of buffer assemblies are used for buffering the tension received by the drainage tube.

[0010] Further, the buffer assembly comprises a sliding rod, the sliding rod is arranged perpendicularly to the upper connecting pipe and is slidingly connected to the upper connecting pipe, an end of the sliding rod located outside the upper connecting pipe is provided with a baffle, a buffer spring is arranged between the baffle and the upper connecting pipe, the buffer spring is sleeved on the sliding rod, and two ends of the buffer spring are fixed to the baffle and the upper connecting pipe respectively, a contact roller is arranged on the other end of the sliding rod, and the contact roller is fixed to the sliding rod; under the action of the buffer spring, the contact rollers of the two groups of buffer assemblies are respectively abutted against different positions of the drainage tube inside the upper connecting pipe, so that the drainage tube is arranged in an S shape in the upper connecting pipe.

[0011] Further, an inner side of an end of the upper connecting pipe away from the middle connecting pipe is provided with a third internal thread, the inside of the upper connecting pipe is provided with a tapered end, an outer surface of the tapered end is provided with a third external thread, the tapered end is threadedly connected to the upper connecting pipe, a middle of a smaller end of the tapered end is provided with a limiting hole, and the tapered end is provided with a ninth notch; when the tapered end is tightly fixed to the upper connecting pipe, the eighth notch and the ninth notch are staggered.

[0012] Further, an outer wall of the small-diameter end of the tapered end is provided with a stop rod corresponding in number and position to the sliding rods, one end of the stop rod is fixed to the tapered end, the other end of the stop rod is in contact with one end of the baffle towards the outer wall of the upper connecting pipe, the baffle is provided with an arc-shaped wedge, one end of the arc-shaped wedge is fixed to the baffle, the end of the stop rod is in contact with the arc-shaped wedge, when the tapered end is rotated and tightly fixed to the upper connecting pipe, the stop rod slides from the high position of the arc-shaped wedge to the low position, under the action of the buffer spring, the sliding rod moves towards the inside of the upper connecting pipe, and then the drainage tube is abutted and deformed.

[0013] Further, the contact roller is provided with a clamping groove, and the drainage tube is located in the clamping groove.

[0014] The beneficial effects of the present application are as follows:

[0015] In the technical solution, the ball head is assembled in the spherical groove, and can rotate in any direction in the spherical groove, that is, the drainage tube can be inclined and changed in any direction when matching the movement of the patient, meanwhile, the drainage tube inside the middle connecting tube is fixed by the adhesive tape, that is, when the drainage tube is pulled, the outward movement of the drainage tube is pulled by the adhesive tape, thereby avoiding the problem that the end of the drainage tube is separated from the chest cavity under the action of external force.

[0016] Additional advantages, objects, and features of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. The objectives and other advantages of the application can be realized and attained by the structure particularly pointed out in the description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the purposes, technical solutions and beneficial effects of the present application clearer, the present application provides the following drawings for illustration:

[0018] Fig. 1 It is a perspective view of the fixed assembly and the buffer assembly combined in the drainage device of the present application;

[0019] Fig. 2 It is a plane view of the drainage device of the present application applied to chest wall drainage;

[0020] Fig. 3 It is a perspective view of each component of the rotating seat and the ball head part in the drainage device of the present application;

[0021] Fig. 4 It is a perspective view of each component at the middle connecting tube part in the drainage device of the present application;

[0022] Fig. 5 It is a perspective view of each component at the upper connecting tube part in the drainage device of the present application;

[0023] Fig. 6 It is a plane view of the several contact rollers acting on the drainage tube in the drainage device of the present application.

[0024] In the drawings, the following marks are used:

[0025] 1, adhesive board; 2, first notch; 3, rotating seat; 4, second notch; 5, ball head; 6, third notch; 7, lower connecting pipe; 8, first external thread; 9, middle connecting pipe; 10, first internal thread; 11, fifth notch; 12, seventh notch; 13, second external thread; 14, mounting ring; 15, lifting rod; 16, fixing ring; 17, supporting spring; 18, threaded section; 19, adjusting ring; 20, adhesive tape roll; 21, locking nut; 22, sixth notch; 23, upper connecting pipe; 24, eighth notch; 25, second internal thread; 26, sliding rod; 27, baffle; 28, buffer spring; 29, contact roller; 30, clamping groove; 31, tapered end; 32, ninth notch; 33, blocking rod; 34, third internal thread; 35, third external thread; 36, C-shaped guide block; 37, chest wall; 38, drainage device main body; 39, drainage tube. DETAILED DESCRIPTION

[0026] As Figs. 1-6As shown, the thoracic surgery drainage device comprises a drainage device body 38, the drainage device body 38 comprises a drainage tube 39 (preferably a compression-resistant drainage tube in the prior art, that is, the drainage tube can be bent, but the internal cavity is not easy to be blocked by deformation bending), and a fixing assembly is sleeved on the part of the drainage tube 39 close to the chest wall 37, the fixing assembly comprises a paste board 1 (the paste board 1 is provided with double-sided tape, which can be replaced and recycled), the paste board 1 is provided with a first notch 2 extending from the middle to one side, the middle of the paste board 1 is provided with a rotating seat 3, one end of the rotating seat 3 is fixed to the paste board 1, the other end of the rotating seat 3 is provided with a spherical groove, the rotating seat 3 is provided with a second notch 4 extending outward from the middle, the spherical groove is provided with a hollow ball head 5, the ball head 5 is connected to the spherical groove in all directions, and the outer wall of the ball head 5 is provided with a third notch 6, the part of the ball head 5 outside the rotating seat 3 is provided with a lower connecting pipe 7, the outer wall of the lower connecting pipe 7 is provided with a first external thread 8, the outer wall of the lower connecting pipe 7 is provided with a fourth notch (drawn, not labeled), the lower connecting pipe 7 is sleeved with a middle connecting pipe 9, the inner wall of one end of the middle connecting pipe 9 towards the lower connecting pipe 7 is provided with a first internal thread 10, the first internal thread 10 is threadedly connected to the first external thread 8, the outer wall of the middle connecting pipe 9 is provided with a fifth notch 11, the outer wall of the middle connecting pipe 9 is provided with a mounting ring 14, the mounting ring 14 is fixed to the middle connecting pipe 9, and the mounting ring 14 is provided with a sixth notch 22 corresponding to the position of the fifth notch 11, the mounting ring 14 is provided with an adhesive tape roll 20, the adhesive tape roll 20 is detachably connected to the mounting ring 14, the part of the middle connecting pipe 9 corresponding to the position of the adhesive tape roll 20 is provided with a seventh notch 12 (preferably, symmetrically arranged), the adhesive tape on the adhesive tape roll 20 enters from the seventh notch 12 and is wound and fixed on the surface of the drainage tube 39, the widths of the first notch 2, the second notch 4, the third notch 6, the fourth notch, the fifth notch 11, the sixth notch 22 and the seventh notch 12 are all greater than the diameter of the drainage tube 39, and when the middle connecting pipe 9 is tightly fixed to the lower connecting pipe 7, the fourth notch and the fifth notch 11 are arranged staggered.

[0027] The working principle of the above technical scheme is:

[0028] When the medical staff completes the intubation of the chest, the drainage tube 39 is pulled out from the first gap 2, the second gap 4, the third gap 6, the fourth gap, the fifth gap 11 and the sixth gap 22 into the inside of the middle connecting pipe 9, and then the tape on the tape roll 20 is pulled out from the upper end of the seventh gap 12 into the middle connecting pipe 9, so that the adhesive side of the tape is in contact with the drainage tube 39 (of course, the tape can be pre-wound on the drainage tube 39, and the fifth gap 11 of the middle connecting pipe 9 can be used as an operation space for pre-winding the tape on the drainage tube 39), and the tape is adhered to the outer surface of the drainage tube 39. Then, by rotating the middle connecting pipe 9, the end thereof is screwed to the lower connecting pipe 7. During the rotation, the middle connecting pipe 9 rotates the mounting ring 14, and in turn rotates the tape roll 20. Since the tape on the tape roll 20 is adhered to the drainage tube 39, and the drainage tube 39 does not rotate, the rotation of the mounting ring 14 and the tape roll 20 will wind the tape on the outer surface of the drainage tube 39, and in turn fix the tape to the drainage tube 39. In this technical solution, the ball head 5 is assembled in the spherical groove and can rotate in any direction in the spherical groove. That is, when the patient moves, the drainage tube 39 can be inclined and changed in any direction, and at the same time, the drainage tube 39 inside the middle connecting pipe 9 is fixed by the tape. When the drainage tube 39 is pulled, the outward movement of the drainage tube 39 will be pulled by the tape, thereby avoiding the problem that the end of the drainage tube 39 is separated from the chest under the action of external force (of course, preferably, the drainage tube 39 has a bending allowance between the tape and the chest wall 37).

[0029] It should be noted that, by rotating the middle connecting pipe 9 and the lower connecting pipe 7, the tape on the tape roll 20 is rotated and wound and fixed to the drainage tube 39, which greatly improves the fixing efficiency of the drainage tube 39. When the drainage tube 39 is removed, the tape only needs to be cut to quickly release the fixation of the drainage tube 39. The length of the tape on the tape roll 20 is large, and it can be used multiple times (it is not difficult to understand that the tape roll 20 can refer to the transparent adhesive tape roll in the prior art, which contains an internal winding ring and a plurality of lengths of tape wound thereon). In this technical solution, the fourth gap and the fifth gap 11 are staggered after the middle connecting pipe 9 and the lower connecting pipe 7 are screwed and connected, so that the drainage tube 39 is enclosed inside the middle connecting pipe 9, thereby avoiding the problem that the drainage tube 39 deviates and separates to the outside of the middle connecting pipe 9.

[0030] In an implementable mode, the mounting ring 14 is provided with a lifting rod 15, the lifting rod 15 is slidingly connected to the mounting ring 14, the lifting rod 15 is provided with a fixing ring 16 at a lower position of the mounting ring 14, the middle part of the fixing ring 16 is fixed to the lifting rod 15, a supporting spring 17 is arranged between the fixing ring 16 and the mounting ring 14, the supporting spring 17 is sleeved on the lifting rod 15, and the two ends of the supporting spring 17 are fixed to the fixing ring 16 and the mounting ring 14 respectively, a threaded section 18 is arranged on the lifting rod 15 above the mounting ring 14, an adjusting ring 19 is arranged on the threaded section 18, the adjusting ring 19 is threadedly connected to the threaded section 18, a tape roll 20 is sleeved on the threaded section 18 and above the adjusting ring 19, and a locking nut 21 is arranged on the threaded end of the tape roll 20, and the locking nut 21 is threadedly connected to the threaded section 18.

[0031] The tape roll 20 is sleeved on the lifting rod 15, that is, in the rotating process, the tape roll 20 rotates, the tape on the tape roll 20 can be “torn off” and wound on the drainage tube 39, and after the winding is completed, the tape roll 20 is fixed to the adjusting ring 19 through the locking nut 21, so that the problem that the tape roll 20 continues to rotate when the drainage tube 39 is pulled can be avoided, that is, after the fixed tape roll 20 cannot rotate, the tape wound on the drainage tube 39 can play the role of “pulling rope” to limit the pulling position of the drainage tube 39. At the same time, the setting of the locking nut 21 can adjust the rotation damping of the tape roll 20, that is., the winding tightness of the tape on the drainage tube 39 is improved, and the winding effect is further improved.

[0032] In an implementable mode, the seventh gap 12 is arranged through the upper end of the middle connecting pipe 9, so as to facilitate the tape to enter the contact with the outer wall of the drainage tube 39 from the upper end of the middle connecting pipe 9, the rotating seat 3 below the mounting ring 14 is provided with a C-shaped guide block 36, the thickness of the C-shaped guide block 36 gradually increases from both ends to the middle part, the C-shaped guide block 36 is arranged on the rotating path of the lifting rod 15, and one end of the lifting rod 15 in contact with the C-shaped guide block 36 is provided with a roller, the diameter of the roller is greater than the width of the second gap 4 (to avoid the end of the lifting rod 15 entering the second gap 4).

[0033] The working principle of the above technical scheme is as follows:

[0034] When the middle connecting pipe 9 rotates, the mounting ring 14 and the lifting rod 15 are rotated, and the lifting rod 15 is abutted against the C-shaped guide block 36 under the action of the supporting spring 17, and is lifted along with the change of the height of the C-shaped guide block 36, and the lifting of the lifting rod 15 drives the lifting of the adhesive tape roll 20, and then drives the lifting of the adhesive tape, and then the winding and bonding position of the adhesive tape on the drainage pipe 39 is lifted (preferably, the final position of the lifting rod 15 is at the lowest position of the C-shaped guide block 36, that is, the adhesive tape is arranged at an acute angle with the drainage pipe 39, which can achieve better pulling effect), that is, compared with the same position bonding, the bonding area of the adhesive tape and the drainage pipe 39 is large, and the bonding stability is stronger, that is, the anti-pulling effect is better, and if in the same plane, the winding thickness of the adhesive tape increases in the winding process, and the winding thickness cannot significantly improve the bonding force of the adhesive tape and the drainage pipe 39, on the contrary, when the drainage pipe 39 is pulled, the wound adhesive tape is changed from a columnar sliding shape to a conical shape, which can cause the anti-pulling effect of the drainage pipe 39 to be poor.

[0035] In an implementable manner, the end of the middle connecting pipe 9 away from the lower connecting pipe 7 is provided with a second external thread 13, the middle connecting pipe 9 is sleeved with the upper connecting pipe 23, the end of the upper connecting pipe 23 towards the middle connecting pipe 9 is provided with a second internal thread 25, the second internal thread 25 is threadedly connected to the second external thread 13, the side surface of the upper connecting pipe 23 is provided with an eighth notch 24, the fifth notch 11 and the eighth notch 24 are arranged in a staggered manner when the upper connecting pipe 23 is tightly fixed to the middle connecting pipe 9, and the outer wall of the upper connecting pipe 23 is provided with at least two groups of buffer assemblies, the two groups of buffer assemblies are oppositely arranged and arranged at different heights, and the two groups of buffer assemblies are used to buffer the pulling force received by the drainage pipe 39.

[0036] In an implementable manner, one group of buffer assemblies includes a sliding rod 26, the sliding rod 26 is arranged perpendicularly to the upper connecting pipe 23 and is slidingly connected to the upper connecting pipe 23, the end of the sliding rod 26 outside the upper connecting pipe 23 is provided with a baffle 27, the baffle 27 and the upper connecting pipe are provided with a buffer spring 28, the buffer spring 28 is sleeved on the sliding rod 26, and the two ends of the buffer spring 28 are fixed to the baffle 27 and the upper connecting pipe 23 respectively, the other end of the sliding rod 26 is provided with a contact roller 29, the contact roller 29 is fixed to the sliding rod 26, and under the action of the buffer spring 28, the contact rollers 29 of the two groups of buffer assemblies are respectively abutted against different positions of the drainage pipe 39 inside the upper connecting pipe 23, so that the drainage pipe 39 is arranged in an S shape in the upper connecting pipe 23.

[0037] The working principle of the above technical scheme is as follows:

[0038] When the drainage tube 39 is suddenly pulled, the drainage tube 39 will move the contact roller 29, and then move the sliding rod 26 outward, and then make the buffer spring 28 be pulled (the drainage tube 39 is quickly straightened from bending), the drainage tube 39 generates a pulling force on the buffer spring 28 through the contact roller 29, and the buffer spring 28 will be elastically stretched, that is, part of the "instant impact force" is converted into "elastic potential energy of the buffer spring 28", so as to avoid damage of the drainage tube 39 or the adhesive tape below the drainage tube 39 due to sudden force (equivalent to "unload part of the rigid impact"); when the external force decreases or disappears, the elastic restoring force of the buffer spring 28 will pull the sliding rod 26 and the contact roller 29 back to the initial position, so that the drainage tube 39 recovers from the "straightened state" to the bending state of "being able to be pulled again", ensuring the cyclic working ability of the whole system. In short, this setting mode can realize the dual functions of "directional transmission of force" and "force protection". And this setting mode can provide a certain outward movement compensation distance for the drainage tube 39 through the straightening of the curvedly arranged drainage tube 39, that is, the external drainage tube 39 needs to be pulled to a greater length to make the end of the drainage tube 39 separate from the chest wall 37.

[0039] In an implementable mode, the third inner thread 34 is arranged on the inner side of the end of the upper connecting tube 23 away from the middle connecting tube 9, the upper connecting tube 23 is internally provided with a tapered end head 31, the outer surface of the tapered end head 31 is provided with a third outer thread 35, the tapered end head 31 is threadedly connected to the upper connecting tube 23, the smaller end of the tapered end head 31 is internally provided with a limiting hole, and the eighth gap 24 and the ninth gap 32 are arranged in a staggered mode when the tapered end head 31 is tightly fixed to the upper connecting tube 23.

[0040] In an implementable mode, the outer wall of the small-diameter end of the tapered end head 31 is provided with a number of stop rods 33 corresponding to the number and positions of the sliding rods 26, one end of each stop rod 33 is fixed to the tapered end head 31, the other end of each stop rod 33 is in contact with one end of the baffle 27 towards the outer wall of the upper connecting tube 23, and the baffle 27 is provided with an arc-shaped wedge block (not shown), one end of the arc-shaped wedge block is fixed to the baffle 27, and the end of the stop rod 33 is in contact with the arc-shaped wedge block, when the tapered end head 31 is rotated and tightly screwed on the upper connecting tube 23, the stop rod 33 slides from the high part to the low part of the arc-shaped wedge block, and under the action of the buffer spring 28, the sliding rod 26 moves to the inside of the upper connecting tube 23, and then abuts against and deforms the drainage tube 39.

[0041] The working principle of the above technical solution is as follows:

[0042] The limiting hole arranged on the conical end 31 can limit the movement direction of the drainage tube 39, and can avoid the case that the drainage tube 39 in the upper connecting pipe 23 shakes greatly, and ensure the contact effect of the contact roller 29 and the drainage tube 39. In addition, the arrangement of the stop rod 33 can limit the position of the baffle 27, that is, ensure that the sliding rod 26 is pulled out outward in the initial state, so as to facilitate the entry of the drainage tube 39. After the drainage tube 39 enters, only the conical end 31 needs to be rotated, so that the conical end 31 is connected with the upper part in the process of being fixed in rotation, and the stop rod 33 slides from the high position of the arc-shaped wedge to the low position, that is, at this time, under the action of the buffer spring 28, the sliding rod 26 will slide inward, and then the contact roller 29 abuts against the drainage tube 39, and then the curvedly arranged drainage tube 39 is formed in the upper connecting pipe 23. That is, through the ingenious structure design, the position of the contact roller 29 can be controlled in the process of being rotated by the conical end 31, so as to adapt to the installation and dismounting process and the working process of the drainage tube 39.

[0043] In an implementable manner, the contact roller 29 is provided with a clamping groove 30, and the drainage tube 39 is located in the clamping groove 30, so as to avoid the separation of the drainage tube 39 and the contact roller 29, and improve the curved arrangement effect of the drainage tube 39.

[0044] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A drainage device for cardiothoracic surgery, comprising a drainage device body, wherein the drainage device body includes a drainage tube, characterized in that: A fixing assembly is fitted onto the portion of the drainage tube near the chest wall. The fixing assembly includes an adhesive plate with a first notch extending from the center to one side. A rotating seat is located in the center of the adhesive plate, with one end fixed to the adhesive plate and the other end having a spherical groove. The rotating seat has a second notch extending outward from the center, and a hollow ball head is located within the spherical groove. The ball head is universally connected to the spherical groove, and its outer wall has a third notch. A lower connecting tube is located on the portion of the ball head outside the rotating seat, with a first external thread on its outer wall and a fourth notch. A middle connecting tube is fitted onto the lower connecting tube, and the inner wall of the middle connecting tube facing the lower connecting tube has a first external thread. An internal thread is provided, which is threaded to the first external thread. A fifth notch is provided on the outer wall of the middle connecting tube. An installation ring is provided on the outer wall of the middle connecting tube and is fixed to the middle connecting tube. A sixth notch is provided on the installation ring, which corresponds to the position of the fifth notch. A tape roll is provided on the installation ring and is detachably connected to the installation ring. A seventh notch is provided on the middle connecting tube at the position corresponding to the tape roll. The tape on the tape roll enters from the seventh notch and is wrapped and fixed to the surface of the drainage tube. The widths of the first notch, second notch, third notch, fourth notch, fifth notch, sixth notch and seventh notch are all greater than the diameter of the drainage tube. When the middle connecting tube is tightened and fixed to the lower connecting tube, the fourth notch and the fifth notch are staggered. The mounting ring is provided with a lifting rod, which is slidably connected to the mounting ring. A fixing ring is provided at the lower part of the lifting rod, and the middle part of the fixing ring is fixed to the lifting rod. A support spring is provided between the fixing ring and the mounting ring, and the support spring is sleeved on the lifting rod. Both ends of the support spring are respectively fixed to the fixing ring and the mounting ring. A threaded section is provided on the part of the lifting rod above the mounting ring. An adjusting ring is provided on the threaded section and is threadedly connected to the threaded section. The tape roll is sleeved on the threaded section and is located above the adjusting ring. A locking nut is provided on the threaded end above the tape roll and is threadedly connected to the threaded section. The seventh notch is provided through the upper end of the middle connecting pipe. A C-shaped guide block is provided on the rotating seat below the mounting ring. The thickness of the C-shaped guide block gradually increases from both ends to the middle. The C-shaped guide block is provided on the rotation path of the lifting rod. A roller is provided on the end of the lifting rod that contacts the C-shaped guide block. The diameter of the roller is greater than the width of the second notch.

2. The drainage device for cardiothoracic surgery according to claim 1, characterized in that: The middle connecting pipe has a second external thread at the end away from the lower connecting pipe. An upper connecting pipe is sleeved on the middle connecting pipe. The upper connecting pipe has a second internal thread at the end facing the middle connecting pipe. The second internal thread is threaded onto the second external thread. An eighth notch is provided on the side of the upper connecting pipe. When the upper connecting pipe is tightened and fixed on the middle connecting pipe, the fifth notch and the eighth notch are staggered. At least two sets of buffer components are provided on the outer wall of the upper connecting pipe. The two sets of buffer components are arranged opposite each other and at different heights. The two sets of buffer components are used to buffer the tension on the drainage pipe.

3. A drainage device for cardiothoracic surgery according to claim 2, characterized in that: One set of the buffer components includes a sliding rod, which is perpendicular to the upper connecting pipe and slidably connected to it. A baffle is provided on one end of the sliding rod outside the upper connecting pipe. A buffer spring is provided between the baffle and the upper connecting pipe. The buffer spring is sleeved on the sliding rod, and its two ends are respectively fixed to the baffle and the upper connecting pipe. A contact roller is provided on the other end of the sliding rod and is fixed to it. Under the action of the buffer spring, the contact rollers of the two sets of buffer components abut against different positions on the drainage pipe inside the upper connecting pipe, so that the drainage pipe is arranged in an S-shape inside the upper connecting pipe.

4. A drainage device for cardiothoracic surgery according to claim 3, characterized in that: The upper connecting pipe has a third internal thread on the inner side of the end away from the middle connecting pipe. The upper connecting pipe has a tapered end inside. The tapered end has a third external thread on its outer surface. The tapered end is threaded onto the upper connecting pipe. The tapered end has a limiting hole in the middle of its smaller end. The tapered end has a ninth notch. When the tapered end is tightened and fixed onto the upper connecting pipe, the eighth and ninth notches are staggered.

5. A drainage device for cardiothoracic surgery according to claim 4, characterized in that: The outer wall of the small-diameter end of the conical end is provided with a stop bar corresponding to the number and position of the sliding rods. One end of the stop bar is fixed to the conical end, and the other end of the stop bar contacts the end of the baffle facing the outer wall of the upper connecting pipe. The baffle is provided with an arc-shaped wedge. One end of the arc-shaped wedge is fixed to the baffle, and the end of the stop bar contacts the arc-shaped wedge. When the conical end is rotated and tightened onto the upper connecting pipe, the stop bar slides from the high point of the arc-shaped wedge to the low point. Under the action of the buffer spring, the sliding rod moves into the interior of the upper connecting pipe, thereby deforming the drainage pipe.

6. A drainage device for cardiothoracic surgery according to claim 3, characterized in that: The contact roller is provided with a groove, and the drain tube is located in the groove.

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