Postoperative effusion drainage device

Abstract

The invention relates to the field of medical instruments, in particular to a postoperative effusion drainage device which comprises an outer sleeve, an inner sleeve, a supporting structure and a positioning plug. When the device needs to be used for abdominal cavity postoperative channel drainage, the supporting structure is in a closed state in an initial state, at the moment, the positioning plug plays a role in relatively fixing the inner sleeve at a port of the rear end of the outer sleeve, and the rear end of the inner sleeve is connected with a negative pressure drainage bag or an injector to suck or suck hydrops. When the device is conveyed to a preset position, the inner sleeve is forcibly pulled backwards, the inner sleeve axially moves backwards relative to the outer sleeve, the supporting structure is compressed, the middle section hunches outwards, and the interior of the channel is expanded; in the expanding and supporting process, when the supporting structure is in a negative pressure state, effusion in the suction channel is collected into the supporting structure, and under the negative pressure suction effect of the rear end of the inner sleeve, the effusion is continuously drained.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a postoperative effusion drainage device. Background Art

[0002] Placing a peritoneal drainage tube after abdominal surgery is an important means of preventing and treating postoperative complications and treating some surgical diseases. Placing a peritoneal drainage tube is beneficial for draining or discharging fluids accumulated in the abdominal cavity, including blood, pus, inflammatory exudate, bile, secretions, etc.

[0003] At present, many drainage tubes for effusion are prone to failure to drain during actual use. After research, it was found that many drainage tubes cannot be drained after being implanted in the body in the following situations: 1. The drainage tube is higher than the level of the effusion, so the drainage hole cannot contact the effusion and cannot drain; 2. The channel is narrow and blocked, and the accumulated fluid cannot flow smoothly to the drainage hole area of ​​the drainage tube, resulting in failure of drainage; 3. There are floccules in the effusion, which blocks the channel or drainage hole, making it impossible to drain. The effusion cannot be drained and accumulates in the patient's body, which can easily lead to wound infection, tissue necrosis, etc. after surgery, and even endanger the patient's life in severe cases.

[0004] Currently, many surgical operations are open surgery with large incisions. Based on the drainage of effusion, many operations do not require sutures after surgery, so that the effusion can be discharged smoothly. However, the disadvantage is that the incision remains open, which can easily lead to infection, thus endangering the safety of the patient. Summary of the invention

[0005] In order to solve the above problems, the object of the present invention is to provide a postoperative effusion drainage device with better drainage effect.

[0006] The objective of the present invention is achieved through the following technical solutions: The present invention provides a postoperative effusion drainage device, comprising: an outer sleeve, an inner sleeve, a support structure, and a positioning plug; the inner sleeve is arranged inside the outer sleeve and extends out of the front and rear ends of the outer sleeve, and a positioning plug is arranged on the inner sleeve at the rear end of the outer sleeve, and the front end of the inner sleeve and the front end of the outer sleeve are respectively connected to the two ends of the support structure; the support structure has an elastic memory deformation property, and can be transformed into two forms: stretched to become a slender shape attached to the tube wall of the inner sleeve and compressed to arch outward; a plurality of drainage holes are opened on the inner sleeve and located in the support structure; The inner sleeve is pulled forward, and the supporting structure is deformed into a slender shape and attached to the wall of the inner sleeve, so that the postoperative fluid drainage device is delivered to the predetermined position of the channel. Then, the inner sleeve is pulled backward, and the supporting bracket is compressed and arched outward to expand the inside of the channel. During the expansion process, when the supporting structure is in a negative pressure state, the accumulated fluid in the channel is attracted to the supporting structure, and the accumulated fluid is continuously drained under the action of the negative pressure suction at the rear end of the inner sleeve.

[0007] Furthermore, the supporting structure includes a supporting bracket, which is a cylindrical sleeve-shaped metal wire braided bracket structure made of nickel-titanium alloy.

[0008] Furthermore, fixing rings are sleeved on the inner sleeve and the outer sleeve at the ends of both sides of the supporting bracket, and the supporting bracket is connected between the two fixing rings.

[0009] Furthermore, the supporting structure includes a plurality of groups of supporting ribs, and the supporting ribs are in the form of slender sheets.

[0010] Furthermore, fixing rings are sleeved on the inner sleeves and the outer sleeves at the ends of both sides of the multiple groups of support ribs, and the supporting bracket is connected between the two fixing rings.

[0011] Furthermore, the postoperative fluid drainage device also includes a balloon, which is a compliant balloon. The supporting structure is attached to the inner membrane of the balloon. After the supporting structure and the balloon are attached, both ends are connected to the front end of the inner sleeve and the front end of the outer sleeve. A plurality of through holes are opened on the balloon.

[0012] Furthermore, a water injection passage is provided in the inner sleeve, and the front section of the water injection passage extends to the front end of the inner sleeve to form a water injection port; the water injection passage fits the inner sleeve and extends backward to the rear end of the inner sleeve, and extends out from the wall of the inner sleeve to be connected with a Luer connector.

[0013] Furthermore, the postoperative fluid drainage device also includes a guide wire, a guide wire hole is opened at the front end of the inner sleeve, the guide wire is arranged in the inner sleeve, and the front end of the guide wire is penetrated by the guide wire hole.

[0014] Furthermore, a hand-held sleeve is sleeved on the outer circumference of the tube wall at the rear end of the outer sleeve close to the port.

[0015] Furthermore, a Luer connector for connecting an external negative pressure drainage bag or a syringe is provided at the rear end port of the inner sleeve.

[0016] The postoperative fluid drainage device of the present invention, when it is necessary to use the device for postoperative channel drainage of the abdominal cavity, the support structure is in a closed state in the initial state, at this time, the positioning plug plays a relatively fixed role on the inner sleeve at the rear end port of the outer sleeve, and the rear end of the inner sleeve is connected to a negative pressure drainage bag or a syringe to attract or aspirate the accumulated fluid. The device is transported into the channel, and when it is transported to the predetermined position, the inner sleeve is pulled backward with force, and the inner sleeve moves axially backward relative to the outer sleeve, and the compressed middle section of the support structure arches outward to expand the inside of the channel. During the expansion process, when the support structure is in a negative pressure state, the accumulated fluid in the channel is attracted to gather in the support structure, and the accumulated fluid is continuously drained under the action of the negative pressure suction at the rear end of the inner sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a disconnected diagram of the overall structure of a postoperative effusion drainage device solution in one state of the present invention; Figure 2 It is a cross-sectional view of a supporting structure and a balloon in one state in the first solution of the postoperative effusion drainage device of the present invention; Figure 3 It is a disconnected diagram of the overall structure of another state of the first scheme of the postoperative effusion drainage device of the present invention; Figure 4 It is a cross-sectional view of another state of the supporting structure and the balloon in the first solution of the postoperative effusion drainage device of the present invention; Figure 5 It is a cutaway view of the rear end structure of the first scheme of the postoperative fluid drainage device of the present invention; Figure 6 This is a cutaway view of the inner sleeve structure of the first solution of the postoperative fluid drainage device of the present invention; Figure 7 It is a disconnected diagram of the overall structure of the second scheme of the postoperative effusion drainage device of the present invention in one state; Figure 8 This is an overall structural diagram of another state of the second scheme of the postoperative effusion drainage device of the present invention; Fig. 9 It is a cross-sectional view of the support structure and the balloon in the third scheme of the postoperative effusion drainage device of the present invention; Fig.10 It is an exploded view of the supporting structure and the balloon in the third scheme of the postoperative effusion drainage device of the present invention; The accompanying drawings are marked as follows: 1. outer sleeve; 2. inner sleeve; 3. positioning plug; 4. supporting bracket; 5. fixing ring; 6. supporting ribs; 7. fixing ring; 8. balloon; 9. through hole; 10. water injection passage; 11. water injection port; 12. Luer connector; 13. guide wire; 14. guide wire hole; 15. hand-held sleeve; 16. drainage hole. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] like Figures 1 to 10 As shown, the present invention is mainly used for drainage of fluid accumulation after gastrointestinal surgery and laparoscopic surgery. The present invention has three schemes, and the first scheme is listed here first.

[0020] Solution 1: The outer sleeve 1 of the device is a slender catheter, the front end of the outer sleeve 1 is the end for delivery into the patient's body, and the rear end is the handheld operation end. The front and rear end ports of the outer sleeve 1 are both open structures so that the inner part of the outer sleeve 1 is connected front and back. A circular sleeve-shaped hand-held sleeve 15 is fixedly sleeved on the outer peripheral position of the tube wall near the port at the rear end of the outer sleeve 1. The axial cross-section of the hand-held sleeve 15 is I-shaped, and the front and rear ends of the hand-held sleeve 15 are both provided with a circumferential raised retaining ring structure, which is convenient for the doctor to hold with his fingers and control the outer sleeve 1 to move in the front and rear axial direction.

[0021] An inner sleeve 2 is sleeved inside the outer sleeve 1, and the inner sleeve 2 is longer than the outer sleeve 1, so that the front and rear ends of the inner sleeve 2 can extend out of the front and rear ports of the outer sleeve 1. A Luer connector 12 is fixedly arranged at the rear end port of the inner sleeve 2, wherein the Luer connector 12 is an external thread structure, and a front end head of the inner sleeve 2 is arranged at the front end of the inner sleeve 2. The front end of the front end head of the inner sleeve 2 is a circular arc hemispherical end head, and can also be a conical end head. The front end of the front end head of the inner sleeve 2 adopts this structure, which can effectively ensure that during the pipeline transportation in the patient's body, the inner sleeve 2 can reduce the resistance as much as possible, ensuring that it can be smoothly transported forward in the channel. A guide wire hole 14 is opened at the axial center position of the shell of the front end head of the inner sleeve 2, so that the inner sleeve 2 can also be penetrated from front to back, which can facilitate the guide wire 13 to penetrate and be transported forward.

[0022] A balloon 8 structure is provided between the front end of the inner sleeve 2 and the front end of the outer sleeve 1. The balloon 8 is a compliant balloon 8. The front ends of the outer sleeve balloon 8 are respectively fixed between the inner sleeve 2 tube wall position slightly behind the front end of the inner sleeve 2 and the front end of the outer sleeve 1. The inner sleeve 2 sleeves the front end of the balloon 8, and the outer sleeve 1 sleeves the rear end of the balloon 8, so that when the inner sleeve 2 and the outer sleeve 1 produce relative axial movement, the balloon 8 will be stretched or compressed along the distance between the front end of the inner sleeve 2 and the front end of the outer sleeve 1. There are multiple groups of through holes 9 evenly spaced on the balloon 8 along the sleeve axis direction, and each group of through holes 9 is evenly distributed at multiple angles along the circumferential direction, so that multiple through holes 9 are evenly distributed on the surface of the balloon 8 as a whole, penetrating the inside and outside of the balloon 8.

[0023] A support stent 4 is fixedly attached to the inner membrane of the balloon 8. The support stent 4 is a cylindrical sleeve-shaped metal wire braided stent structure, made of nickel-titanium alloy, and has elastic memory deformation characteristics. The two ends of the support stent 4 are also fixed to the front end wall of the inner sleeve 2 and the front end wall of the outer sleeve 1 along with the two ends of the balloon 8. The support stent 4 plays a role in supporting and shaping the contour of the balloon 8.

[0024] Two deformation states of the support bracket 4 and the balloon 8: 1. When the inner sleeve 2 moves axially forward relative to the outer sleeve 1, the distance between the front end of the inner sleeve 2 and the front end of the outer sleeve 1 becomes larger, and the support bracket 4 will be stretched. When the distance increases to the maximum limit of the support bracket 4, the support bracket 4 becomes slender and attached to the wall of the inner sleeve 2. At the same time, the balloon 8 is also synchronously attached to the wall of the inner sleeve 2 in a slender shape along with the support bracket 4. In this state, the device can be easily transported in the patient's body channel.

[0025] 2. When the inner sleeve 2 moves axially backward relative to the outer sleeve 1, the distance between the front end of the inner sleeve 2 and the front end of the outer sleeve 1 becomes smaller. At this time, the support bracket 4 is in an axially compressed state. Under the action of the memory elastic deformation characteristics, the middle section of the support bracket 4 will arch toward the periphery in an arc shape. The overall arched cross-sectional profile is similar to the curve shape of the peak and trough sections of a sine curve. In this state, the balloon 8 also expands and arches synchronously with the support bracket 4. At this time, the balloon 8 has a filling effect, and the evenly distributed through holes 9 on the surface of the balloon 8 are also opened as the balloon 8 is filled, which can attract the accumulated fluid in the channel.

[0026] In the inner sleeve 2 section of the inner wrapped area of ​​the balloon 8, a plurality of drainage holes 16 are evenly distributed on the wall of the inner sleeve 2 with uniform circumferential angles and uniform axial spacing. The drainage holes 16 can draw the accumulated fluid flowing into the balloon 8 into the inner sleeve 2 and discharge it from the rear end along the inner sleeve 2.

[0027] At the outer peripheral position of the inner sleeve 2 at the rear port of the outer sleeve 1, a positioning plug 3 is sleeved. The positioning plug 3 is made of silicone material. The positioning structure of the positioning plug 3 is inserted into the port of the outer sleeve 1. The positioning structure of the positioning plug 3 is a conical ring-shaped disc structure. The disc of the positioning structure is conical toward the front side, and the conical closing port is close to the outer wall of the inner sleeve 2. The root of the conical disc is tightly plugged into the rear end port of the outer sleeve 1. The positioning plug 3 can make the outer sleeve 1 and the inner sleeve 2 play a relatively fixed role. There is a circumferential outer flange structure at the rear, which is used for the doctor's hand control.

[0028] A water injection passage 10 is fixedly provided on the inner wall of the inner channel of the inner sleeve 2, and the front section of the water injection passage 10 extends to the front end of the inner sleeve 2 and opens to form a water injection port 11. The water injection passage 10 fits the inner part of the inner sleeve 2 and extends backward to the rear end of the inner sleeve 2, and extends obliquely from the tube wall for a certain length, and a Luer connector 12 is fixedly connected at the tail end, which is used to inject water into the water injection passage 10 to flush the patient's body channel, facilitate drainage, and prevent tube blockage.

[0029] Solution 2: Compared with Solution 1, Solution 2 cancels the balloon 8 structure outside the support stent 4, and fixed rings 5 ​​are fixedly sleeved on the inner sleeve 2 and the outer sleeve 1 at the ends of both sides of the support stent 4, and the fixed rings 5 ​​play a role in fixing the ends of both sides of the support stent 4. The braided structure of the support stent has multiple meshes on it, and the effusion circulation and suction effect is stronger than that of Solution 1. In addition, the support stent 4 is exposed on the outside, and when it is stretched into a slender shape for in vivo delivery, the support stent 4 is retracted, which will not hinder the delivery.

[0030] Solution 3: Compared with Solution 1, Solution 3 retains the balloon 8 structure and replaces the support bracket 4 with a support rib 6 structure. The support rib 6 is a slender sheet with elastic deformation characteristics. The two ends of the support rib 6 are integrally connected to the fixing ring 7, and the fixing ring 7 is also fixed on the tube wall at the front end of the inner sleeve 2 and the front end of the outer sleeve 1. Multiple groups of support ribs 6 are evenly distributed and fixed at a circular angle between the two fixing rings 7. When the inner sleeve 2 and the outer sleeve 1 produce relative axial movement, the support rib 6 can be arched and flatly fit the outer wall of the sleeve, producing an elastic change with the same effect as the support bracket 4, thereby ensuring the support effect on the balloon 8.

[0031] Taking scheme 1 as an example, when the device is needed to perform postoperative channel drainage of the abdominal cavity, the support bracket and the balloon 8 are in a closed state in the initial state, and the positioning plug 3 plays a relatively fixed role on the inner sleeve 2 at the rear end port of the outer sleeve 1, and the rear end of the inner sleeve 2 is connected to a negative pressure drainage bag or a syringe to attract or aspirate the effusion. Under the guidance of the guide wire 13, the device is transported into the channel. When it is transported to the predetermined position, the inner sleeve 2 is pulled backward with force, and the inner sleeve 2 moves axially backward relative to the outer sleeve 1. The compressed middle section of the support bracket 4 arches outward, and the balloon 8 is synchronously expanded to expand the inside of the channel. During the expansion process, when the balloon 8 is in a negative pressure state, the effusion is attracted to gather in the balloon 8, and the channel in the expansion area is expanded. The effusion at the front and rear ends will gather in the expansion area. Under the action of the negative pressure suction of the inner sleeve 2, the effusion is continuously drained. During drainage, a syringe can be connected through the Luer connector 12 at the rear end of the water injection passage 10, and water can be injected and flushed into the patient's body channel through the water injection port 11 at the front section of the inner sleeve 2 to facilitate drainage and prevent tube blockage.

[0032] The innovative technical points and beneficial effects of the present invention are at least: 1. The present invention adopts a structural design of a balloon 8 with distributed through holes 9, and cooperates with the expansion of the support bracket 4 or the support rib 6, so that the drainage channel in the patient's body is forced to expand, and the drainage channel in the front and rear sections of the expansion area can also expand to a certain extent, thereby increasing the space of the drainage channel, so that the accumulation of fluid in the narrow channel can be effectively alleviated, and the drainage efficiency is greatly increased. At the same time, after the expansion of the support bracket 4 or the support rib 6, it can compress the drainage through the inner depression, thereby forming a low terrain in the area where the balloon 8 expands, so that the accumulated fluid can effectively gather to the expansion area, thereby effectively ensuring the stability of the drainage of the accumulated fluid.

[0033] 2. The two ends of the support bracket 4 and the support rib 6 of the present invention are connected and fixed in a manner of two sleeves respectively, so that the inner sleeve 2 can be pulled back to support and expand, and can be folded forward to be flush, so that the filling and releasing effects of the traditional balloon 8 through inflation and deflation can be achieved through a very simple operation, and different expansion degrees can be quickly adjusted according to the different sizes of the drainage channels in the patient's body, which greatly increases the versatility of the device and can meet the drainage needs after abdominal surgery or laparoscopic surgery.

[0034] 3. Scheme 1 and Scheme 3 of the present device adopt a structural design with multiple through holes 9 on the surface, which can make the supporting bracket 4 and the supporting rib 6 be in a negative pressure state inside the balloon 8 during the process of the balloon 8 being expanded and filled from being collapsed to expanded and filled. A large amount of negative pressure can be sucked into the balloon 8 from the accumulated fluid in the external drainage channel, thereby greatly increasing the drainage efficiency.

[0035] 4. The device adopts the structure of a porous balloon 8, which can increase the effective holes for drainage. The surface of the balloon 8 can be expanded and enlarged, and more through holes 9 can be set for drainage and suction. The diameter of a simple drainage tube is too thin to set too many drainage holes 16. By increasing the effective holes in the balloon 8, the accumulated fluid can be attracted into the balloon 8 more quickly, which greatly facilitates the suction of the drainage holes 16 of the inner sleeve 2. The increase in effective holes can also effectively avoid blockage of the holes, thereby ensuring the stability of the device during use.

[0036] 5. The positioning plug 3 of the rear end plug of the outer sleeve 1 can play the role of axial fixing of the inner and outer sleeves 1 at any time, so that the support bracket 4 and the support rib 6 can be fixed at any time when expanded to any extent, and a stable use effect can be achieved in drainage channels of different sizes, which greatly increases the stability and convenience of the use of the device.

[0037] 6. A water injection passage 10 is provided inside the inner sleeve 2 and passes through it. The rear end is obliquely extended out of the inner sleeve 2 through a secondary joint and connected to a Luer joint 12. The water injection port 11 at the front section of the inner sleeve 2 is used to inject water and flush the patient's body channel, which is convenient for drainage and prevents tube blockage, further ensuring the stability of the device during treatment.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A postoperative effusion drainage device, characterized in that: include: Outer sleeve, inner sleeve, supporting structure, positioning plug; The inner sleeve is arranged inside the outer sleeve and extends out of the front and rear ends of the outer sleeve. The inner sleeve is provided with the positioning plug at the rear end of the outer sleeve. The front end of the inner sleeve and the front end of the outer sleeve are respectively connected to the two ends of the supporting structure. The supporting structure has elastic memory deformation characteristics, and changes between two forms: being stretched to become slender and attached to the tube wall of the inner sleeve and being compressed and arched outward. A plurality of drainage holes are opened on the inner sleeve and located in the supporting structure. The inner sleeve is pulled forward, and the supporting structure is deformed into a slender shape and attached to the tube wall of the inner sleeve, so that the postoperative fluid drainage device is transported to a predetermined position of the channel. Then, the inner sleeve is pulled backward, and the supporting bracket is compressed and arched outward to expand the inside of the channel. During the expansion process, when the supporting structure is in a negative pressure state, the accumulated fluid in the channel is attracted to the supporting structure, and the accumulated fluid is continuously drained under the action of the negative pressure suction at the rear end of the inner sleeve.

2. The postoperative fluid drainage device according to claim 1, characterized in that: The supporting structure comprises a supporting bracket, and the supporting bracket is a cylindrical sleeve-shaped metal wire braided bracket structure made of nickel-titanium alloy.

3. The postoperative fluid drainage device according to claim 2, characterized in that: The inner sleeve and the outer sleeve at the ends of both sides of the support bracket are both sleeved with fixing rings, and the support bracket is connected between the two fixing rings.

4. The postoperative fluid drainage device according to claim 1, characterized in that: The supporting structure includes a plurality of groups of supporting ribs, and the supporting ribs are in the form of elongated sheets.

5. The postoperative fluid drainage device according to claim 4, characterized in that: The inner sleeves and the outer sleeves at the ends of both sides of the plurality of groups of support ribs are sleeved with fixing rings, and the supporting bracket is connected between the two fixing rings.

6. The postoperative fluid drainage device according to claim 1, characterized in that: The postoperative fluid drainage device also includes a balloon, which is a compliant balloon. The supporting structure is attached to the inner membrane of the balloon. After the supporting structure and the balloon are attached, both ends are connected to the front end of the inner sleeve and the front end of the outer sleeve. The balloon is provided with a plurality of through holes.

7. The postoperative fluid drainage device according to claim 1, characterized in that: A water injection passage is provided in the inner sleeve, and the front section of the water injection passage extends to the front end of the inner sleeve to form a water injection port; the water injection passage fits the inner sleeve and extends backward to the rear end of the inner sleeve, and extends out from the wall of the inner sleeve to be connected with a Luer connector.

8. The postoperative fluid drainage device according to claim 1, characterized in that: The postoperative fluid drainage device also includes a guide wire. A guide wire hole is opened at the front end of the inner sleeve. The guide wire is arranged inside the inner sleeve, and the front end of the guide wire passes through the guide wire hole.

9. The postoperative fluid drainage device according to claim 1, characterized in that: A hand-held sleeve is sleeved on the outer circumference of the tube wall at the rear end of the outer sleeve close to the port.

10. The postoperative fluid drainage device according to claim 1, characterized in that: A Luer connector for externally connecting a negative pressure drainage bag or a syringe is arranged at the rear end port of the inner sleeve.

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