Negative pressure drainage device

Abstract

The utility model discloses a negative pressure drainage device which comprises a flushing pipe, a drainage pipe and a sponge structure used for filling wound cavity gaps. And the sponge structure covers and is connected outside the flushing tube and the drainage tube. The inflow end of the flushing pipe extends out of the sponge structure to be used for being connected with an externally-arranged flushing fluid supply device, and a pipe body, located in the sponge structure, of the flushing pipe is provided with flushing holes penetrating through the wall face so that flushing fluid can seep out of the sponge structure after passing through the flushing holes. The outflow end of the drainage tube extends out of the sponge structure to be used for being connected with an external negative pressure source, and a suction hole penetrating through the wall surface is formed in a tube body, located in the sponge structure, of the drainage tube, so that outflow liquid in a wound cavity gap passes through the sponge structure and then enters the drainage tube through the suction hole to be discharged. When the novel drainage device is used for surgical operation, the whole process is convenient to operate, the rigidity of the drainage device can be improved, the situation that the sponge structure is broken and left in the body of a patient is avoided, and the operation safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anticipation instruments, in particular to a negative pressure drainage device. Background Art

[0002] At present, various surgeries such as orthopedics, general surgery, neurosurgery, thoracic surgery, plastic surgery, and obstetrics and gynecology involve wounds with a lot of exudate, especially orthopedic osteomyelitis and the repair of large wounds. For these wounds, the wounds are deep and the exudate is large. If the necrotic tissue, exudate, and blood are not drained out in time, it will lead to infection or the original infection will persist. These wounds need to be placed on the bed with flushing and suction tubes. Through flushing and drainage, the liquid can flow in the wound and various exudate tissues in the wound can be cleaned in time to prevent postoperative infection and facilitate wound healing.

[0003] Negative pressure suction drainage (VSD) is widely used in clinical practice. Its sponge dressing can ensure that the wound surface is evenly attracted by negative pressure. Due to the three-dimensional micropores, the body tissue will not cause drainage blockage. It is mostly used for drainage of superficial wounds. However, in improving the drainage of deep wounds, it is not suitable for deep tissues due to its square shape and large size.

[0004] like Figure 1 As shown, CN215308896U discloses an intracavitary drainage device with suction and flushing functions, including a sponge 1, a suction tube 2, a drug delivery tube 3 and a cannula 4. The front ends of the suction tube 2 and the drug delivery tube 3 are inserted into the sponge 1, and are provided with corresponding drainage holes and flushing holes. The sponge 1 is delivered to the patient's inner cavity through the cannula 4; when the cannula 4 is delivered in place, the medical staff presses the sponge 1 against the cannula 4 through the suction tube 2 and the drug delivery tube 3, and at the same time spirally pulls the cannula 4 outward to separate the sponge 1 from the cannula 4, and the cannula 4 is pulled out of the patient's body, and the sponge 1 remains in the inner cavity and automatically expands to fill the entire inner cavity; at this time, the drug delivery tube 3 can be administered, and the suction tube 2 can be subjected to negative pressure suction. The device has the following problems:

[0005] 1. After the drainage device is delivered to the patient's inner cavity, the cannula 4 needs to be pulled outward to separate the sponge 1 from the cannula 4, otherwise the negative pressure suction operation cannot be performed, and the whole process is relatively cumbersome;

[0006] 2. After a period of time, the sponge may grow together with the granulation tissue in the patient's body. After the negative pressure suction operation is completed, if the force is too great when taking out the sponge, it may break and remain in the patient's body. Moreover, the broken sponge absorbs a large amount of blood exudate in the body, which is not easy to be found after being left in the body, which may lead to medical accidents. Utility Model Content

[0007] The utility model provides a negative pressure drainage device to solve the technical problems of the existing intracavitary drainage device, that the operation process is complicated and the sponge is easy to break when taken out and remain in the patient's body.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A negative pressure drainage device is used in wound cavities with greater depth. The negative pressure drainage device includes: a flushing tube and a drainage tube for conveying, and a sponge structure for expanding and filling the wound cavity; the sponge structure covers and is connected to the outside of the flushing tube and the drainage tube; the inlet end of the flushing tube extends out of the sponge structure for connection with an external flushing liquid supply device, and the flushing tube is provided with a flushing hole that penetrates the wall on the tube body located in the sponge structure, so that the flushing liquid can seep out of the sponge structure after passing through the flushing hole; the outlet end of the drainage tube extends out of the sponge structure for connection with an external negative pressure source, and the drainage tube is provided with a suction hole that penetrates the wall on the tube body located in the sponge structure, so that the outflow liquid in the wound cavity can pass through the sponge structure and enter the drainage tube through the suction hole for external discharge.

[0010] Furthermore, the sponge structure includes a sponge body wrapped around the flushing tube and the drainage tube, and a top cover and a bottom cover detachably connected to both ends of the sponge body; the inlet end of the flushing tube and the outlet end of the drainage tube respectively extend out of the sponge body along the length direction of the sponge body, and the flushing tube and the drainage tube are also respectively fixed to the top cover and / or the bottom cover.

[0011] Furthermore, the lower end surface of the top cover is concave to form a top cover cavity which is arranged to cooperate with the upper end of the sponge body, and the upper end of the sponge body is inserted into the top cover cavity with an interference fit so as to be detachably fixed to the top cover; the upper end surface of the top cover is also processed with a first mounting hole and a second mounting hole which extend inwardly and connect to the top cover cavity; the inlet end of the flushing tube passes through the first mounting hole and then extends outward, and is tightly fitted with the first mounting hole; the outlet end of the drainage tube passes through the second mounting hole and then extends outward, and is tightly fitted with the second mounting hole.

[0012] Furthermore, the bottom cover includes a bottom cover body, the upper end surface of the bottom cover body is concave to form a bottom cover cavity that cooperates with the lower end of the sponge body; the lower end of the sponge body is interference-inserted into the bottom cover cavity to be detachably fixed to the bottom cover.

[0013] Furthermore, the bottom cover also includes an undercut extending from the bottom of the bottom cover cavity into the bottom cover cavity; the undercut is used to insert into the end hole of the flushing tube or the drainage tube, thereby fixing the corresponding flushing tube or the drainage tube to the bottom cover.

[0014] Furthermore, the sponge is prepared from PVA sponge, or the sponge is prepared from elastic water-absorbing material; the sponge is cylindrical, rectangular, cube-shaped, or other shapes as required.

[0015] Furthermore, the corpus cavernosum has a developing mark thereon.

[0016] Furthermore, the outer shell of the sponge body is provided with a protective cover, and the protective cover has a developing mark.

[0017] Furthermore, the lower ends of both the flushing tube and the drainage tube extend as close to the bottom cover as possible; the drainage tube and the flushing tube are arranged in parallel, and the inner diameter of the drainage tube is larger than the inner diameter of the flushing tube.

[0018] Furthermore, the drainage tube and the flushing tube are made of a material that can be deformed under stress.

[0019] The utility model has the following beneficial effects:

[0020] When the negative pressure drainage device of the utility model is used for surgical operation, after the drainage device is delivered to the wound cavity of the patient, there is no need to pull out any components in the sponge structure, and only the flushing tube and the drainage tube need to be pulled out, so that the whole operation process is convenient; on the other hand, because the sponge structure covers and is connected to the outside of the flushing tube and the drainage tube, the structural setting of the sponge structure can increase the rigidity of the drainage device on the one hand, making it easier to penetrate into the wound cavity with a larger depth; on the other hand, because the sponge structure is a detachable structural whole, after the negative pressure suction operation is completed, when the sponge structure is taken out, it is not easy to cause the sponge structure to be broken and left in the patient's body due to excessive force, thereby effectively improving the safety of operation.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of an existing intracavitary drainage device;

[0024] Figure 2 This is a schematic diagram of the spatial structure of a negative pressure drainage device according to a preferred embodiment of the utility model;

[0025] Figure 3 yes Figure 2 Schematic diagram of the deployment of the medium negative pressure drainage device.

[0026] Legend

[0027] 1. Sponge; 2. Suction tube; 3. Dosing tube; 4. Cannula; 50. Flushing tube; 501. Flushing hole; 60. Drainage tube; 601. Suction hole; 70. Sponge body; 80. Top cover; 90. Bottom cover; 901. Bottom cover cavity; 91. Bottom cover body; 92. Inverted. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0029] Reference Figure 2-3 The preferred embodiment of the utility model provides a negative pressure drainage device, which is applied to deep wound cavities. The negative pressure drainage device includes: a flushing tube 50 and a drainage tube 60 for conveying, and a sponge structure for expanding and filling the wound cavity. The sponge structure covers and is connected to the outside of the flushing tube 50 and the drainage tube 60. The inlet end of the flushing tube 50 extends out of the sponge structure to be connected to an external flushing liquid supply device. The flushing tube 50 is located in the sponge structure. A flushing hole 501 is provided on the tube body that penetrates the wall surface, so that the flushing liquid can seep out of the sponge structure after passing through the flushing hole 501. The outlet end of the drainage tube 60 extends out of the sponge structure to be connected to an external negative pressure source. The drainage tube 60 is located in the sponge structure. A suction hole 601 is provided on the tube body that penetrates the wall surface, so that the outflow liquid in the wound cavity passes through the sponge structure and enters the drainage tube 60 through the suction hole 601 for external discharge.

[0030] When the negative pressure drainage device of the utility model is used for surgical operation, the wound surface is firstly thoroughly cleaned and hemostatically stopped by conventional methods. Then, after cleaning, the negative pressure drainage device of the utility model is taken out and stuffed into the wound cavity. If necessary, it is sutured and fixed. Then, the drainage tube 60 and the flushing tube 50 are led out of the wound cavity, and the wound surface is covered with a sterile surgical film. Finally, the drainage tube 60 is connected to the negative pressure source (or the medical center negative pressure is used), and the flushing tube 50 is connected to the flushing liquid supply device (generally a flushing liquid bottle) through a disposable infusion set. The flushing liquid is recommended to be 0.2% heparin saline (500ml of normal saline plus 1 bottle of 1ml of heparin sodium), and the flushing liquid dripping speed is adjusted as needed, and the negative pressure value is adjusted between -125mmHg and -450mnHg (-0.017 to -0.060Mpa).

[0031] When the negative pressure drainage device of the utility model is used for surgical operation, after the drainage device is delivered to the wound cavity of the patient, there is no need to pull out any components in the sponge structure, and only the flushing tube 50 and the drainage tube 60 need to be pulled out, so that the whole process is convenient to operate; on the other hand, since the sponge structure covers and is connected to the outside of the flushing tube 50 and the drainage tube 60, the structural setting of the sponge structure can increase the rigidity of the drainage device on the one hand, making it easier to penetrate into the wound cavity with a larger depth; on the other hand, since the sponge structure is a detachable structural unit, after the negative pressure suction operation is completed, when the sponge structure is taken out, it is not easy to cause the sponge structure to be broken and left in the patient's body due to excessive force, thereby effectively improving the safety of operation.

[0032] Alternatively, if Figure 3 As shown, the sponge structure includes a sponge body 70 covering the outside of the flushing tube 50 and the drainage tube 60, and a top cover 80 and a bottom cover 90 detachably connected to both ends of the sponge body 70. The inlet end of the flushing tube 50 and the outlet end of the drainage tube 60 extend out of the sponge body 70 along the length direction of the sponge body 70, and the flushing tube 50 and the drainage tube 60 are also fixed to the top cover 80 and / or the bottom cover 90, respectively. In this optional solution, the sponge structure is formed by a detachable assembly of a sponge body 70, a top cover 80 and a bottom cover 90. Therefore, on the one hand, it is convenient for the installation and disassembly of the flushing tube 50 and the drainage tube 60. On the other hand, the detachable overall structure can also effectively increase the rigidity of the drainage device, making it easier to penetrate into the wound cavity with a larger depth, and at the same time effectively avoid the sponge body 70 being left alone in the patient's body when the device is removed; in addition, in this optional solution, since the flushing tube 50 and the drainage tube 60 are also respectively fixed to the top cover 80 and / or the bottom cover 90, when the drainage device is removed, the entire device can be easily pulled out through the flushing tube 50 and the drainage tube 60, preventing the sponge body 70 from falling into the patient's body due to excessive tearing force.

[0033] In this option, if Figure 3 As shown, the lower end surface of the top cover 80 is concave to form a top cover cavity that is arranged in cooperation with the upper end of the sponge 70, and the upper end of the sponge 70 is inserted into the top cover cavity with interference fit so as to be detachably fixed with the top cover 80. The upper end surface of the top cover 80 is also processed with a first mounting hole and a second mounting hole that extend inwardly and communicate with the top cover cavity. The inlet end of the flushing tube 50 is extended outward after passing through the first mounting hole, and is tightly matched with the first mounting hole. The outlet end of the drainage tube 60 is extended outward after passing through the second mounting hole, and is tightly matched with the second mounting hole. In this optional scheme, the structural setting mode of the top cover 80 is convenient for detachable fixation with the sponge 70 on the one hand, and on the other hand, it also effectively fixes the inlet end of the flushing tube 50 and the outlet end of the drainage tube 60, so that when taking out the drainage device, the entire device can be easily pulled out through the flushing tube 50 and the drainage tube 60, preventing the sponge 70 from falling off in the patient's body due to excessive tearing force.

[0034] In this option, if Figure 3 As shown, the bottom cover 90 includes a bottom cover body 91, and the upper end surface of the bottom cover body 91 is concave to form a bottom cover cavity 901 that is arranged to cooperate with the lower end of the sponge 70. The lower end of the sponge 70 is inserted into the bottom cover cavity 901 by interference fit to be detachably fixed to the bottom cover 90; during the surgical operation, the sponge 70 can also be cut to length according to clinical needs while being cleaned and then buckled with the bottom cover 90, thereby improving the adaptability of the sponge structure.

[0035] Furthermore, if Figure 3 As shown, the bottom cover 90 also includes an undercut 92 extending from the bottom of the bottom cover cavity 901 into the bottom cover cavity 901. The undercut 92 is used to be inserted into the end hole of the irrigation tube 50 or the drainage tube 60, thereby fixing the corresponding irrigation tube 50 or the drainage tube 60 to the bottom cover 90. In a specific embodiment of this optional solution, the undercut 92 is inserted into the end hole of the lower end of the drainage tube 60, so that the bottom of the drainage tube 60 is fastened by the undercut 92, which can further prevent the sponge 70 from falling off when the device is pulled out.

[0036] In this optional solution, the sponge 70 is made of PVA sponge, or the sponge 70 is made of elastic water-absorbing material, which is convenient to obtain, easy to process and prepare, and has a low preparation cost. The sponge 70 is cylindrical, rectangular, cubic, or other shapes as required; when the sponge 70 is cylindrical, rectangular, cubic, or other shapes as required, the top cover 80 at its upper end is processed with a top cover cavity that is compatible with the structure of the upper end of the sponge 70, and the bottom cover 90 at its lower end is also processed with a bottom cover cavity that is compatible with the structure of the lower end of the sponge 70, thereby realizing a detachable connection between the sponge 70 and the top cover 80 and the bottom cover 90 at the upper and lower ends.

[0037] Optionally, in the first embodiment of the sponge 70, the sponge 70 has a developing mark, such as a medical developing line. The sponge 70 with the medical developing line can be developed under x-rays, thereby facilitating medical staff to find out whether there is any broken sponge left in the patient's body, thereby reducing medical accidents caused by left-over sponge during surgery.

[0038] Optionally, in the second embodiment of the sponge 70, the sponge 70 is covered with a protective cover, and the protective cover has a developing mark; in this optional solution, the protective cover can be gauze or a net bag, and the developing mark is a medical developing line. The sponge 70 with the medical developing line can be developed under x-rays, so that medical staff can find out whether there is broken sponge left in the patient's body, thereby reducing medical accidents caused by sponge residue during surgery.

[0039] Alternatively, if Figure 3As shown, the lower ends of the flushing tube 50 and the drainage tube 60 extend as close to the bottom cover 90 as possible, thereby increasing the working efficiency of the flushing tube 50 and the drainage tube 60. The drainage tube 60 and the flushing tube 50 are arranged in parallel, and the inner diameter of the drainage tube 60 is larger than the inner diameter of the flushing tube 50, so that the drainage tube 60 can quickly absorb the waste liquid generated by flushing and the extravasated liquid from the wound.

[0040] Optionally, the drainage tube 60 and the flushing tube 50 are made of a material that can be deformed under force, such as a plastic material, so that the drainage device can be simply deformed after penetrating into the patient's wound cavity, thereby maximizing contact with the patient's inner cavity and better performing drainage and flushing operations.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A negative pressure drainage device, characterized in that: Applied in the wound cavity, the negative pressure drainage device comprises: A flushing tube (50) and a drainage tube (60) for conveying, and a sponge structure for expanding and filling the wound cavity; The sponge structure covers and is connected to the outside of the flushing tube (50) and the drainage tube (60); The inlet end of the flushing pipe (50) extends out of the sponge structure so as to be connected to an external flushing liquid supply device; the flushing pipe (50) is provided with a flushing hole (501) penetrating the wall surface on the pipe body located inside the sponge structure so that the flushing liquid can seep out of the sponge structure after passing through the flushing hole (501); The outflow end of the drainage tube (60) extends out of the sponge structure so as to be connected to an external negative pressure source. The drainage tube (60) is provided with a suction hole (601) penetrating the wall surface on the tube body located in the sponge structure, so that the outflowing fluid in the wound cavity passes through the sponge structure and enters the drainage tube (60) through the suction hole (601) for external discharge.

2. The negative pressure drainage device according to claim 1, characterized in that: The sponge structure comprises a sponge body (70) covering the outside of the flushing tube (50) and the drainage tube (60), and a top cover (80) and a bottom cover (90) detachably connected to both ends of the sponge body (70); The inlet end of the flushing tube (50) and the outlet end of the drainage tube (60) extend out of the sponge body (70) along the length direction of the sponge body (70), and the flushing tube (50) and the drainage tube (60) are also fixed to the top cover (80) and / or the bottom cover (90), respectively.

3. The negative pressure drainage device according to claim 2, characterized in that: The lower end surface of the top cover (80) is concave to form a top cover cavity that is arranged in cooperation with the upper end of the sponge body (70); the upper end of the sponge body (70) is inserted into the top cover cavity through interference fit so as to be detachably fixed to the top cover (80); The upper end surface of the top cover (80) is also processed with a first mounting hole and a second mounting hole extending inwardly and communicating with the top cover cavity; The inlet end of the flushing pipe (50) passes through the first mounting hole and then extends outward, and is tightly matched with the first mounting hole; The outflow end of the drainage pipe (60) passes through the second mounting hole and then extends outward, and is tightly matched with the second mounting hole.

4. The negative pressure drainage device according to claim 2, characterized in that: The bottom cover (90) comprises a bottom cover body (91), the upper end surface of the bottom cover body (91) is concave to form a bottom cover cavity (901) that is arranged in cooperation with the lower end of the sponge body (70); The lower end of the sponge body (70) is inserted into the bottom cover cavity (901) with interference fit so as to be detachably fixed to the bottom cover (90).

5. The negative pressure drainage device according to claim 4, characterized in that: The bottom cover (90) further comprises an undercut (92) extending from the bottom of the bottom cover cavity (901) into the bottom cover cavity (901); The undercut (92) is used to be inserted into the end hole of the flushing tube (50) or the drainage tube (60), thereby fixing the corresponding flushing tube (50) or the drainage tube (60) to the bottom cover (90).

6. The negative pressure drainage device according to claim 2, characterized in that: The sponge (70) is made of PVA sponge, or the sponge (70) is made of elastic water-absorbing material; The sponge (70) is cylindrical, rectangular or cube-shaped.

7. The negative pressure drainage device according to claim 2, characterized in that: The sponge (70) has a developing mark thereon.

8. The negative pressure drainage device according to claim 2, characterized in that: The sponge (70) is covered with a protective sleeve, and the protective sleeve has a developing mark.

9. The negative pressure drainage device according to claim 2, characterized in that: The drainage tube (60) and the flushing tube (50) are arranged in parallel, and the inner diameter of the drainage tube (60) is greater than the inner diameter of the flushing tube (50).

10. The negative pressure drainage device according to claim 2, characterized in that: The drainage tube (60) and the flushing tube (50) are made of a material that can be deformed under force.

Images