CN116392705B - A fixation-free wound drainage tube for total knee replacement - Google Patents

Abstract

The invention discloses a fixing-free wound drainage tube for total knee arthroplasty, which comprises: the drainage component comprises a suction end and a hose; one end of the hose is inserted into the suction end and fixedly connected with the suction end; the suction end is made of metal materials, so that the hose is prevented from being mistakenly sewn when the joint capsule and the subcutaneous tissue are sewn; the fixed component is arranged in the direction that the suction end is far away from the patient, and the hose passes through the fixed component and then enters the suction end; the fixing component comprises a fixing tube, an injection tube and a balloon; the fixed pipe is fixedly connected with the suction end; the injection tube and the saccule are respectively arranged at two ends of the fixed tube; a cavity is arranged in the fixing tube, so that the injection tube is communicated with the saccule; the suction assembly is arranged at one end of the hose, which is far away from the suction end; the suction assembly is communicated with the hose and used for collecting liquid flowing out through the hose.

Description

A fixation-free wound drainage tube for total knee replacement

Technical Field

The invention belongs to the technical field of medical devices, and in particular relates to a fixation-free wound drainage tube for total knee replacement.

Background Art

Total knee replacement is an effective treatment for end-stage knee osteoarthritis and one of the most successful surgeries in the 20th century. Due to the large surgical wound and heavy bleeding during and after the operation, most surgeons will leave a drainage tube in the joint cavity after the operation to drain the blood and tissue fluid that continuously seeps out of the wound after the operation, so as to reduce blood accumulation in the joint and the joint swelling and subcutaneous congestion caused by it. However, there are the following defects when using the drainage tube:

Conventional drainage tubes are usually fixed to the knee joint by suturing to prevent them from falling off during drainage. Although this method can fix the drainage tube, it requires a second surgery to remove the drainage tube, which prolongs the patient's recovery time. Two surgeries also increase the risk of infection for patients.

In view of the above problems, the present invention provides a fixation-free wound drainage tube for total knee replacement.

Summary of the invention

In order to overcome the problems mentioned in the background art, the present invention provides a fixation-free total knee replacement wound drainage tube.

A fixation-free total knee replacement wound drainage tube, comprising:

The drainage assembly comprises a suction end and a hose; one end of the hose is inserted into the suction end and fixedly connected to the suction end; the suction end is made of metal material to prevent the hose from being mistakenly sutured when suturing the joint capsule and subcutaneous tissue;

The fixing assembly is arranged in the direction where the suction end is away from the patient, and the hose passes through the fixing assembly and enters the interior of the suction end; the fixing assembly comprises a fixing tube, an injection tube and a balloon; the fixing tube is fixedly connected to the suction end; the injection tube and the balloon are arranged at both ends of the fixing tube respectively; a cavity is arranged inside the fixing tube so that the injection tube and the balloon are connected;

The suction component is arranged at one end of the hose away from the suction end; the suction component is connected with the hose and collects the liquid flowing out of the hose.

Furthermore, the suction end includes two or more protection units and a head end; adjacent protection units are spliced with each other; the head end is spliced with the protection unit;

Preferably, the protection unit is made of metal material.

Further, the inner side wall of the head end is fixedly connected to the outer side wall of the hose;

Preferably, the minimum inner diameter of the protection unit is greater than the outer diameter of the hose;

Preferably, the minimum inner diameter of the head end is greater than the outer diameter of the hose.

Furthermore, a drainage end is provided at one end of the fixing component away from the suction end; the hose passes through the drainage end and is connected with the suction component; the drainage end includes two or more protection units and a connecting structure; adjacent protection units are spliced with each other; and the connecting structure is provided at one end of the protection unit away from the suction end.

Furthermore, one end of the connection structure is detachably connected to the suction component, and the other end is spliced with the protection unit; the inner side wall of the connection structure is fixedly connected to the outer side wall of the hose;

Preferably, the minimum inner diameter of the connecting structure is greater than the outer diameter of the hose.

Further, the protection unit includes a contraction end and an expansion end; the contraction end and the expansion end are integrally connected; the outer diameter of the contraction end is smaller than the inner diameter of the expansion end;

Preferably, a first locking ring is provided at one end of the contraction end away from the expansion end; a second locking ring is provided at one end of the expansion end away from the contraction end; and an outer diameter of the first locking ring is greater than an inner diameter of the second locking ring.

Further, the outer diameter of the first locking ring is larger than the outer diameter of the contraction end;

Preferably, the inner diameter of the second locking ring is smaller than the inner diameter of the expansion end.

Furthermore, the fixing tube comprises an outer sleeve and an inner sleeve; the inner sleeve is arranged inside the outer sleeve; a cavity is arranged between the outer sleeve and the inner sleeve so that the injection tube and the balloon are connected;

Preferably, a first fixed connection end is provided at one end of the inner sleeve facing the suction end; the first fixed connection end is connected to the suction end;

Preferably, a third locking ring is provided at one end of the first fixed connection end away from the inner sleeve.

Further, the outer diameter of the third locking ring is smaller than the inner diameter of the expansion end; the outer diameter of the third locking ring is larger than the inner diameter of the second locking ring;

Alternatively, the inner diameter of the third locking ring is larger than the outer diameter of the contraction end; the outer diameter of the first locking ring is larger than the inner diameter of the third locking ring.

Furthermore, the suction assembly includes a negative pressure drainage balloon and a drainage bottle; one end of the negative pressure drainage balloon is connected to the drainage bottle, and the other end is detachably connected to the drainage assembly;

Preferably, the negative pressure drainage balloon is threadedly connected to the drainage component;

Preferably, the negative pressure drainage balloon is connected to the hose.

The beneficial effects of the present invention are as follows: a special drainage tube suitable for total knee replacement is provided, which can be firmly fixed at the knee joint by means of a fixing assembly, and the blood, tissue fluid and other liquids that continuously seep out of the wound surface after surgery are discharged from the body through the drainage assembly. The drainage assembly and the fixing assembly are both made of metal shells to prevent the drainage tube from being broken when being mistakenly sutured when suturing the joint capsule and subcutaneous tissue, and remaining in the body when being removed, and requiring a second operation to remove.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a drainage tube implementing the present invention in a normal state;

FIG2 is a schematic diagram of the structure of a drainage tube in a diastolic state according to the present invention;

FIG3 is a schematic diagram of the connection between the drainage component and the fixing component of the present invention;

FIG4 is a cross-sectional view of a drainage assembly and a fixing assembly for implementing the present invention;

FIG5 is a schematic structural diagram of a fixing assembly for implementing the present invention;

FIG6 is a cross-sectional view of a fixing assembly implementing the present invention;

FIG7 is a schematic diagram of the structure of a protection unit implementing the present invention;

FIG8 is a cross-sectional view of a protection unit implementing the present invention;

FIG9 is a schematic diagram of a method for connecting adjacent protection units to implement the present invention;

FIG10 is a schematic diagram of a method for connecting a first fixed connection end and a protection unit to implement the present invention;

FIG11 is a schematic diagram of a method for connecting a second fixed connection end and a protection unit to implement the present invention;

FIG12 is a schematic diagram of the direction of liquid flow when the balloon is inflated according to the present invention;

FIG13 is a cross-sectional view of a fixing assembly implementing the present invention in an expanded state;

In the figure, 1. drainage component; 2. fixing component; 3. suction component; 4. protection unit; 11. suction end; 12. drainage end; 13. hose; 14. connection structure; 21. fixing tube; 22. injection tube; 23. balloon; 31. negative pressure drainage balloon; 32. drainage bottle; 41. contraction end; 42. expansion end; 211. outer sleeve; 212. first fixed connection end; 213. second fixed connection end; 214. inner sleeve.

DETAILED DESCRIPTION

The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "inside" and "outside" etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Example 1

A fixation-free total knee replacement wound drainage tube as shown in FIG1-13 comprises:

The drainage assembly 1 includes a suction end 11 and a hose 13; one end of the hose 13 is inserted into the suction end 11 and fixedly connected to the suction end 11; the suction end 11 is made of metal material to prevent the hose 13 from being mistakenly sutured when suturing the joint capsule and subcutaneous tissue;

The fixing assembly 2 is arranged in the direction where the suction end 11 is away from the patient, and the hose 13 passes through the fixing assembly 2 and enters the interior of the suction end 11; the fixing assembly 2 comprises a fixing tube 21, an injection tube 22 and a balloon 23; the fixing tube 21 is fixedly connected to the suction end 11; the injection tube 22 and the balloon 23 are arranged at both ends of the fixing tube 21 respectively; a cavity is arranged inside the fixing tube 21, so that the injection tube 22 and the balloon 23 are connected;

The suction component 3 is arranged at one end of the hose 13 away from the suction end 11 ; the suction component 3 is connected to the hose 13 to collect the liquid flowing out of the hose 13 .

When in use, the suction end 11 and the end of the hose 13 away from the fixing component 2 are inserted into the joint cavity and aligned with the postoperative wound surface, and then the joint cavity and subcutaneous tissue are sutured. The suction end 11 is made of a metal material that remains solid at room temperature, and the suction end 11 is wrapped around the outside of the hose 13, so that in the process of suturing the joint cavity and subcutaneous tissue, the hose 13 will not be accidentally sutured, resulting in the hose 13 breaking when it is removed, remaining in the body and requiring a second operation to remove.

Then, the fixing component 2 is placed near the patient's skin and the patient's skin is sutured, and the balloon 23 is kept inside the patient's skin and filled during suturing. The fixing tube 21 is made of metal or hard polymer material that remains solid at room temperature, so that the fixing tube 21 is prevented from being pierced during suturing, thereby preventing the fixing component 2 from being mistakenly sutured, which makes it impossible to remove the fixing component 2 and requires a second operation to remove it.

Liquid or gas filler is injected into the balloon 23 through the injection tube 22 to fill the balloon 23, and the filled balloon 23 is placed on the inside of the patient's skin and then the patient's skin is sutured. At this time, under the action of the filled balloon 23, the fixing component 2 cannot slide out through the patient's skin, preventing the suction end 11 and the hose 13 from being separated from the patient's body, so that the suction component 3 can always discharge the blood, tissue fluid and other liquids that continuously seep out of the postoperative wound surface. When the patient needs to remove the tube, the filler inside the balloon 23 is sucked out through the injection tube 22, so that the balloon 23 shrinks, and the suction end 11 and the hose 13 can be pulled out of the patient's body. At this time, a fixation-free total knee replacement wound drainage tube can be removed from the patient's body without cutting the patient's skin for a second operation.

As shown in Fig. 4, the suction end 11 includes two or more protection units 4 and a head end (not shown); adjacent protection units 4 are spliced together; and the head end is spliced with the protection unit 4. The head end is arranged at one end of the protection unit 4 away from the fixing assembly 2, and the head end is aligned with the postoperative wound surface when in use.

There are gaps between adjacent protection units 4, so that the suction end 11 can be bent and can better fit the patient's bone shape. The protection unit 4 is made of a metal material that remains solid at room temperature, so that during the process of suturing the joint cavity and subcutaneous tissue, the suture needle will not pierce the protection unit 4 and sew the suction end 11 to the joint cavity and subcutaneous tissue, so that the tube can be removed without a second operation.

Specifically, the inner wall of the head end is fixedly connected to the outer wall of the hose 13, so that when implanted in the patient's body, one end of the hose 13 can be aligned with the postoperative wound surface to discharge the blood, tissue fluid and other liquids that continuously seep out of the postoperative wound surface.

The hose 13 is arranged inside the head end and the protection unit 4. The minimum inner diameter of the protection unit 4 is larger than the outer diameter of the hose 13, and the minimum inner diameter of the head end is larger than the outer diameter of the hose 13.

As shown in Figs. 7-9, the protection unit 4 includes a contraction end 41 and an expansion end 42; the contraction end 41 and the expansion end 42 are integrally connected; the outer diameter of the contraction end 41 is smaller than the inner diameter of the expansion end 42, so that the contraction end 41 can be inserted into the expansion end 42. When the adjacent contraction end 41 is inserted into the expansion end 42, there is a gap between the contraction end 41 and the expansion end 42, so that the suction end 11 can be bent and can better fit the patient's bone morphology.

A first locking ring (not marked in the figure) is provided at one end of the contraction end 41 away from the expansion end 42; a second locking ring (not marked in the figure) is provided at one end of the expansion end 42 away from the contraction end 41; the outer diameter of the first locking ring is larger than the inner diameter of the second locking ring. This allows adjacent protection units 4 to be spliced together, preventing the suction end 11 from falling apart during use, causing multiple protection units 4 to move in the patient's body and increase the patient's pain.

Specifically, the outer diameter of the first locking ring is larger than the outer diameter of the contraction end 41 , and the inner diameter of the second locking ring is smaller than the inner diameter of the expansion end 42 , so that the contraction end 41 can be inserted into the expansion end 42 .

As shown in FIGS. 5-6 and 10 , the fixing tube 21 includes an outer sleeve 211 and an inner sleeve 214; the inner sleeve 214 is disposed inside the outer sleeve 211; a cavity (not shown in the figure) is disposed between the outer sleeve 211 and the inner sleeve 214, so that the injection tube 22 and the balloon 23 are connected. The hose 13 passes through the inner sleeve 214 and is connected to the suction end 11, and the outer diameter of the hose 13 is smaller than the inner diameter of the inner sleeve 214.

A first fixed connection end 212 is provided at one end of the inner sleeve 214 facing the suction end 11; the first fixed connection end 212 is connected to the suction end 11. A third locking ring is provided at one end of the first fixed connection end 212 away from the inner sleeve 214, and the first fixed connection end 212 is spliced with the protection unit 4 through the third locking ring.

Specifically, the outer diameter of the third locking ring is smaller than the inner diameter of the expansion end 42; the outer diameter of the third locking ring is larger than the inner diameter of the second locking ring; so that the first fixed connection end 212 can be inserted into the adjacent expansion end 42, and when the first fixed connection end 212 is inserted into the adjacent expansion end 42, there is a gap between the first fixed connection end 212 and the expansion end 42, so that the connection between the fixed tube 21 and the suction end 11 can be bent and can better fit the patient's bone morphology. The fixed tube 21 and the adjacent protection unit 4 can be spliced together to prevent the fixed tube 21 from being separated from the suction end 11 during use, so that the suction end 11 moves in the patient's body and increases the patient's pain.

In some embodiments of the present application, the inner diameter of the third locking ring is larger than the outer diameter of the contraction end 41 ; the outer diameter of the first locking ring is larger than the inner diameter of the third locking ring, so that the adjacent contraction end 41 can be inserted into the first fixed connection end 212 .

As shown in FIG. 2 , the suction component 3 includes a negative pressure drainage balloon 31 and a drainage bottle 32 ; one end of the negative pressure drainage balloon 31 is connected to the drainage bottle 32 , and the other end is detachably connected to the drainage component 1 .

Specifically, the negative pressure drainage balloon 31 is connected to the hose 13 , and the liquid in the hose 13 is sucked out by the negative pressure drainage balloon 31 and stored in the drainage bottle 32 .

Optionally, the negative pressure drainage balloon 31 is threadedly connected to the drainage component 1 , so that the suction component 3 can be quickly connected to the drainage component 1 , or removed from the drainage component 1 .

Example 2

As shown in FIG. 1-11 , the difference between this embodiment and embodiment 1 is that:

A drainage end 12 is provided at one end of the fixed component 2 away from the suction end 11; the hose 13 passes through the drainage end 12 and is connected with the suction component 3; the drainage end 12 includes two or more protection units 4 and a connection structure 14; adjacent protection units 4 are spliced with each other; the connection structure 14 is provided at one end of the protection unit 4 away from the suction end 11. One end of the connection structure 14 is detachably connected to the suction component 3, and the other end is spliced with the protection unit 4; the inner side wall of the connection structure 14 is fixedly connected to the outer side wall of the hose 13. The hose 13 passes through the drainage end 12 and is connected to the suction component 3 through the connection structure 14, so that the suction component 3 can be quickly connected to the drainage component 1, or removed from the drainage component 1.

The minimum inner diameter of the connecting structure 14 is greater than the outer diameter of the hose 13 , so that the connecting structure 14 will not squeeze the hose 13 and change the diameter of the hose 13 .

Specifically, a connecting bracket is provided on a side of the connecting structure 14 away from the attraction component 3 , and the connecting bracket is spliced with the adjacent protection unit 4 .

A fifth locking ring is provided at one end of the connecting bracket away from the connecting structure 14 , and the connecting bracket is spliced with the protection unit 4 via the fifth locking ring.

Optionally, the outer diameter of the connecting bracket is smaller than the inner diameter of the expansion end 42 ; the outer diameter of the fifth locking ring is larger than the inner diameter of the second locking ring; so that the connecting bracket can be inserted into the interior of the expansion end 42 .

Alternatively, the inner diameter of the connecting bracket is larger than the outer diameter of the contraction end 41, and the outer diameter of the first locking ring is larger than the inner diameter of the fifth locking ring, so that the contraction end 41 can be inserted into the interior of the connecting bracket.

A second fixed connection end 213 is provided at one end of the inner sleeve 214 facing the drainage end 12; the second fixed connection end 213 is connected to the drainage end 12. A fourth locking ring is provided at one end of the second fixed connection end 213 away from the inner sleeve 214, and the second fixed connection end 213 is spliced with the protection unit 4 through the fourth locking ring.

Specifically, the outer diameter of the fourth locking ring is smaller than the inner diameter of the expansion end 42; the outer diameter of the fourth locking ring is larger than the inner diameter of the second locking ring; so that the second fixed connection end 213 can be inserted into the adjacent expansion end 42. The fixed tube 21 and the adjacent protection unit 4 can be spliced together to prevent the fixed tube 21 from being separated from the drainage end 12 during use, thereby stretching the drainage tube to make the drainage tube thinner and reduce the drainage effect.

In some embodiments of the present application, the inner diameter of the fourth locking ring is larger than the outer diameter of the contraction end 41 ; the outer diameter of the first locking ring is larger than the inner diameter of the fourth locking ring, so that the adjacent contraction end 41 can be inserted into the second fixed connection end 213 .

The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (9)

1. A fixation-free total knee replacement wound drainage tube, characterized in that it comprises: The drainage assembly comprises a suction end and a hose; one end of the hose is inserted into the suction end and fixedly connected to the suction end; the suction end is made of metal material to prevent the hose from being mistakenly sutured when suturing the joint capsule and subcutaneous tissue; A fixing component is arranged in the direction where the suction end is away from the patient, and the hose enters the interior of the suction end after passing through the fixing component; the fixing component includes a fixing tube, an injection tube and a balloon; the fixing tube is fixedly connected to the suction end; the injection tube and the balloon are respectively arranged at the two ends of the fixing tube; a cavity is arranged inside the fixing tube so that the injection tube and the balloon are connected; the suction end includes two or more protection units and a head end; the adjacent protection units are spliced with each other; the head end is spliced with the protection unit; a drainage end is arranged at one end of the fixing component away from the suction end; the hose passes through the drainage end and is connected with the suction component; the drainage end includes two or more protection units and a connecting structure; the adjacent protection units are spliced with each other; the connecting structure is arranged at one end of the protection unit away from the suction end; there is a gap between adjacent protection units, so that the suction end can be bent and can better fit the patient's bone morphology; The suction component is arranged at one end of the hose away from the suction end; the suction component is connected with the hose and collects the liquid flowing out of the hose. 2. The fixation-free total knee replacement wound drainage tube according to claim 1, characterized in that the protection unit is made of metal material. 3. A fixation-free total knee replacement wound drainage tube according to claim 2, characterized in that the inner wall of the head end is fixedly connected to the outer wall of the hose. 4. A fixation-free total knee replacement wound drainage tube according to claim 3, characterized in that one end of the connecting structure is detachably connected to the suction component, and the other end is spliced with the protection unit; the inner wall of the connecting structure is fixedly connected to the outer wall of the hose. 5. A fixation-free total knee replacement wound drainage tube according to any one of claims 2 to 4, characterized in that the protection unit comprises a contraction end and an expansion end; the contraction end and the expansion end are integrally connected; the outer diameter of the contraction end is smaller than the inner diameter of the expansion end; A first locking ring is arranged at one end of the contraction end away from the expansion end; a second locking ring is arranged at one end of the expansion end away from the contraction end; and an outer diameter of the first locking ring is greater than an inner diameter of the second locking ring. 6 . The fixation-free total knee replacement wound drainage tube according to claim 5 , wherein the outer diameter of the first locking ring is larger than the outer diameter of the contraction end. 7. A fixation-free total knee replacement wound drainage tube according to claim 5, characterized in that the fixing tube comprises an outer sleeve and an inner sleeve; the inner sleeve is arranged inside the outer sleeve; a cavity is arranged between the outer sleeve and the inner sleeve so that the injection tube and the balloon are connected; A first fixed connection end is provided at one end of the inner sleeve facing the suction end; the first fixed connection end is connected to the suction end; A third locking ring is disposed at one end of the first fixed connection end away from the inner sleeve. 8. A fixation-free total knee replacement wound drainage tube according to claim 7, characterized in that the outer diameter of the third locking ring is smaller than the inner diameter of the expansion end; the outer diameter of the third locking ring is larger than the inner diameter of the second locking ring; Alternatively, the inner diameter of the third locking ring is larger than the outer diameter of the contraction end; the outer diameter of the first locking ring is larger than the inner diameter of the third locking ring. 9. A fixation-free total knee replacement wound drainage tube according to claim 1, characterized in that the suction component includes a negative pressure drainage balloon and a drainage bottle; one end of the negative pressure drainage balloon is connected to the drainage bottle, and the other end is detachably connected to the drainage component.