Negative pressure drainage device capable of selecting negative pressure amount

Abstract

The utility model relates to the technical field of medical instruments, in particular to a negative pressure drainage device capable of selecting negative pressure quantity, which comprises a negative pressure device capable of rebounding after being flattened, a liquid inlet is formed at one end of the negative pressure device far away from an opening, a drainage tube is detachably connected and mounted at the outer end of the liquid inlet, and the drainage tube comprises a round tube and a notch tube which are formed together. The round pipe and the liquid inlet are installed together, at least two notch grooves are formed in the outer wall of the notch pipe in the length direction, a guide block is fixed to the open end of the negative pressure device, and a center hole is formed in the center of the guide block. The auricle drainage device has the advantages that the structural design is reasonable, the drainage tube is composed of the round tube and the notch tube, the notch tube makes contact with the auricle support, and it is guaranteed that exudation blood and exudation in the auricle can rapidly flow into the drainage tube; the supporting strip can be driven to adjust the position by twisting the rotary base, then the maximum deformation of the negative pressure device is adjusted, the negative pressure during negative pressure drainage is conveniently adjusted, and the using effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a negative pressure drainage device with selectable negative pressure. Background Technology

[0002] Congenital microtia, a common maxillofacial deformity in my country, is characterized by varying degrees of auricular developmental abnormalities, often accompanied by external auditory canal and middle ear malformations. To address this organ loss aesthetically, silicone prostheses, total auricular reconstruction using artificial material frameworks, and autologous rib cartilage framework total auricular reconstruction have been used to treat microtia. Since the material for rib cartilage framework total auricular reconstruction comes from the patient's own body, it not only corrects the cosmetic defect but also alleviates the psychological burden of loss, making autologous rib cartilage ear reconstruction the preferred choice for patients. Over decades of development, modern total auricular reconstruction techniques have evolved from the Tanzer six-stage method and the Brent four-stage method to the widely used two-stage method. The first stage involves harvesting the patient's own rib, sculpting it into the shape of an auricular framework, and implanting the framework into the patient. The second stage involves covering the auricular framework with a drainage tube.

[0003] Among these, drainage of the auricular framework is crucial. If bleeding and exudate cannot be suctioned out in time, it can easily lead to reconstructed auricular hematoma. Existing auricular framework drainage devices have defects, mainly in the following aspects: ① The grooves of the helix and antihelix in the auricular framework, such as... Figure 9 As shown by the dotted line, the groove diameter is 5 mm and it is wider at the top and narrower at the bottom. Currently available drainage tubes cannot be placed in such a delicate area. ② Currently, many drainage tubes are homemade, made of inferior materials, making them prone to blood clots and obstructing drainage. ③ When distal skin flaps show signs such as darkening due to poor blood return, aggressive treatment within 24 hours can effectively improve local ischemia and reduce the incidence of complications caused by insufficient blood supply. For example, changing the drainage tube to zero or low negative pressure can reduce skin tension without affecting drainage effectiveness, thus alleviating poor blood return. However, current drainage devices on the market cannot precisely adjust the negative pressure. Utility Model Content

[0004] The present invention proposes a negative pressure drainage device with selectable negative pressure to solve the above problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A negative pressure drainage device with selectable negative pressure, including a flattened, spring-back negative pressure device, wherein the negative pressure device is a cylindrical shape with one open end. The end of the negative pressure device away from the open end has an inlet and an outlet. A cap is detachably connected to the outlet. A one-way valve is installed inside the negative pressure device corresponding to the position of the inlet. A drainage tube is detachably connected to the outer end of the inlet. The drainage tube includes a cylindrical tube and a notched tube formed together. The cylindrical tube is installed together with the inlet. At least two notches are formed along the length of the outer wall of the notched tube. The negative pressure device has an opening end with a guide block fixed to it. The guide block has a central hole formed in its center and at least two guide grooves formed in a circular array on its surface. A rotating base is rotatably mounted on the side of the guide block away from the negative pressure device. A central column is fixed in the center of the rotating base and rotatably fitted with the central hole in the center of the guide block. At least two support bars are formed on the side of the rotating base facing the guide block and are slidably mounted in the guide grooves. The number of support bars is the same as the number of guide grooves and their positions correspond. The support bars are made of flexible material.

[0007] Furthermore, the notched tube has supporting ridges formed inside, and the number of supporting ridges inside the notched tube is the same as the number of notched grooves on the outer wall of the notched tube, and their positions are staggered.

[0008] Furthermore, the inner walls of the circular tube and the notched tube are coated with an anticoagulant coating.

[0009] Furthermore, a sealing ring is installed on the contact surface of the rotating base, the central column, and the guide block.

[0010] Furthermore, a hook is formed at the end of the negative pressure device away from the rotating base.

[0011] Furthermore, a central sleeve is integrally formed on the center of the side of the guide block facing the negative pressure device, nested outside the central column.

[0012] Furthermore, the guide groove is an arc groove, with one end close to the central column and the other end away from the central column.

[0013] Furthermore, three limiting grooves are formed on one side of the guide groove, and a protruding ridge that cooperates with the limiting grooves is formed on one side of the support strip.

[0014] The beneficial effects of this utility model by adopting the above technical solution are as follows: the structure is reasonably designed, the drainage tube is composed of a round tube and a notched tube, the notched tube is in contact with the auricle support, ensuring that the blood and fluid in the auricle can flow into the drainage tube quickly; by twisting and rotating the base, the position of the support bar can be adjusted, thereby adjusting the maximum deformation of the negative pressure device, which is convenient for adjusting the negative pressure during negative pressure drainage and improving the effect of use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the present invention in a negative pressure-free state;

[0017] Figure 2 This is a schematic diagram showing the position of the support bar and guide groove in the negative pressure-free state of this utility model;

[0018] Figure 3 This is a cross-sectional view of the present invention in a semi-negative pressure state;

[0019] Figure 4 This is a schematic diagram showing the position of the support bar and guide groove in the semi-negative pressure state of this utility model;

[0020] Figure 5 This is a cross-sectional view of the present invention under full negative pressure.

[0021] Figure 6 This is a schematic diagram showing the position of the support bar and guide groove under full negative pressure of this utility model;

[0022] Figure 7 This is a schematic diagram of the first structure of the drainage tube of this utility model;

[0023] Figure 8 This is a schematic diagram of the second structure of the drainage tube of this utility model;

[0024] Figure 9 This is a schematic diagram of an existing auricular support.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Drainage tube; 101. Round tube; 102. Notched tube; 2. Negative pressure device; 201. Liquid inlet; 202. Exhaust port; 203. One-way valve; 3. Rotating base; 301. Support bar; 302. Central column; 4. Guide block; 401. Central sleeve; 402. Guide groove; 5. Sealing ring; 6. Hook; 7. Cap. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-8 As shown, a negative pressure drainage device with selectable negative pressure is included, comprising a flattened, spring-back negative pressure device 2. The negative pressure device 2 is made of silicone rubber or TPU material and is a cylindrical shape with one open end. The end of the negative pressure device 2 away from the open end has an inlet 201 and an outlet 202. A cap 7 is detachably connected to the outlet 202 to control ventilation and exhaust. A one-way valve 203 is installed inside the negative pressure device 2 corresponding to the position of the inlet 201 to ensure that gas and liquid can only enter the negative pressure device 2 through the drainage tube 1 and cannot flow in the reverse direction. A drainage tube 1 with a diameter of 1.5-5mm is detachably connected to the outer end of the inlet 201. The drainage tube 1 includes a circular tube 101 and a notched tube 102 formed together. The circular tube 101 is installed together with the inlet 201. At least two notched grooves are formed along the length of the outer wall of the notched tube 102. To facilitate the flow of blood and fluid from the artificial auricle into the drainage tube 1, a guide block 4 is fixed to the open end of the negative pressure device 2 to achieve end sealing. A central hole is formed in the center of the guide block 4, and at least two guide grooves 402 are formed in a ring array on the guide block 4. A rotating base 3 is rotatably installed on the side of the guide block 4 away from the negative pressure device 2. The rotating base 3 is made of PP material, and a central column 302 is fixed in the center of the rotating base 3 and rotatably fitted with the central hole in the center of the guide block 4, so that the rotating base 3 can rotate relative to the guide block 4 with the central column 302 as the center. At least two support bars 301 are formed on the side of the rotating base 3 facing the guide block 4 and are slidably installed in the guide grooves 402. The number of support bars 301 is the same as the number of guide grooves 402 and their positions correspond. The support bars 301 are made of flexible material, and the support bars 301 are made of rubber, which can be twisted under external force.

[0029] In this embodiment, a support ridge is formed inside the notched tube 102. The number of support ridges inside the notched tube 102 is the same as the number of notched grooves on the outer wall of the notched tube 102, and their positions are staggered. The strength of the notched tube 102 can be improved by the support ridge.

[0030] In this embodiment, the inner walls of the circular tube 101 and the notched tube 102 are coated with an anticoagulant coating. The anticoagulant coating is composed of the following raw materials in the following weight ratio: 0.81-2.0% supporting polymer, 1.2-2.8% superlubricating hydrophilic polymer, 0.32-1.0% anti-infective drug, 0.1-1.5% coupling agent, and 90-97% water. This coating can prevent blood and water stains from adhering to the inner wall of the drainage tube 1.

[0031] In this embodiment, a sealing ring 5 is installed on the contact surface between the rotating base 3, the central column 302 and the guide block 4, which can improve the sealing effect.

[0032] In this embodiment, a hook 6 is formed at the end of the negative pressure device 2 away from the rotating base 3, which facilitates fixing the negative pressure device 2.

[0033] In this embodiment, a central sleeve 401 is integrally formed on the side of the guide block 4 facing the negative pressure device 2 and nested outside the central column 302, which can improve the connection strength between the guide block 4 and the rotating base 3 and improve the service life.

[0034] In this embodiment, the guide groove 402 is an arc groove. One end of the arc groove is close to the central column 302, and the other end of the arc groove is far away from the central column 302. When the support bar 301 rotates in the guide groove 402, the distance between the support bar 301 and the central column 302 will change, thereby changing the flattening effect of the negative pressure device 2.

[0035] In this embodiment, three limiting grooves are formed on one side of the guide groove 402, and a protruding ridge that cooperates with the limiting grooves is formed on one side of the support bar 301. By limiting the position of the support bar 301, it is easy to adjust to the state of no negative pressure, half negative pressure, and full negative pressure.

[0036] The working principle of this utility model is as follows: During use, one end of the drainage tube 1 is surgically fixed within the grooves of the helix and antihelix of the auricle support of the artificial ear. The other end of the drainage tube 1 is connected to the negative pressure device 2. When zero negative pressure is required, the support strip 301 is positioned at the outermost edge of the guide groove 402, at which point the support strip 301 is fully open. Because the support strip 301 is close to the inner wall of the negative pressure device 2, it is impossible to pinch the negative pressure device 2 to flatten it, and there is no negative pressure inside the negative pressure device 2. When semi-negative pressure drainage is required, the rotating base 3 is rotated, causing the support strip 301 to rotate and move within the guide groove 402 to the center of the guide groove 402. At this point, the support strip 301 is located in the center of the inner cavity of the negative pressure device 2. After opening the cap 7, the negative pressure device 2 is pinched flat until it touches the support strip 301 to expel the drainage fluid. When air is trapped inside, the negative pressure device 2 of the support strip 301 can be partially squeezed flat. After closing the cap 7, a semi-negative pressure state can be formed inside the negative pressure device 2. As the negative pressure device 2 gradually rebounds and returns to its original shape, the blood and fluid seepage inside the auricle can be sucked out in time. When full negative pressure drainage is required, rotating the rotating base 3 drives the support strip 301 to rotate and move to the inner end of the guide groove 402. At this time, the support strip 301 is set close to the central column 302. After opening the cap 7, the negative pressure device 2 is squeezed flat until it touches the support strip 301 to expel the air. At this time, the negative pressure device 2 can be completely squeezed flat. After closing the cap 7, a full negative pressure state can be formed inside the negative pressure device 2. As the negative pressure device 2 gradually rebounds and returns to its original shape, the blood and fluid seepage inside the auricle can be sucked out in time.

[0037] Components not described in detail in this article are existing technologies.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A negative pressure drainage device with selectable negative pressure, characterized in that: The device includes a negative pressure device (2) that can spring back after being flattened. The negative pressure device (2) is a cylindrical shape with one end open. The end of the negative pressure device (2) away from the opening is formed with an inlet (201) and an outlet (202). A cap (7) is detachably connected to the outlet (202). A one-way valve (203) is installed inside the negative pressure device (2) at the position corresponding to the inlet (201). A drainage tube (1) is detachably connected to the outer end of the inlet (201). The drainage tube (1) includes a cylindrical tube (101) and a notched tube (102) formed together. The cylindrical tube (101) is installed together with the inlet (201). At least two notched grooves are formed along the length direction on the outer wall of the notched tube (102). The negative pressure device (2) has a guide block (4) fixed at its open end. The guide block (4) has a central hole formed in its center. At least two guide grooves (402) are formed in a ring array on the guide block (4). A rotating base (3) is rotatably installed on the side of the guide block (4) away from the negative pressure device (2). A central column (302) is fixed in the center of the rotating base (3) and is rotatably fitted with the central hole in the center of the guide block (4). At least two support bars (301) are formed on the side of the rotating base (3) facing the guide block (4) and are slidably installed in the guide grooves (402). The number of support bars (301) is the same as the number of guide grooves (402) and their positions correspond. The support bars (301) are made of flexible material.

2. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: The notched tube (102) has a support ridge inside. The number of support ridges inside the notched tube (102) is the same as the number of notched grooves on the outer wall of the notched tube (102) and their positions are staggered.

3. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: The inner walls of the round tube (101) and the notched tube (102) are coated with an anticoagulant coating.

4. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: A sealing ring (5) is installed on the contact surface of the rotating base (3), the central column (302) and the guide block (4).

5. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: The negative pressure device (2) has a hook (6) formed at the end away from the rotating base (3).

6. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: The guide block (4) has a central sleeve (401) integrally formed on the center of the side facing the negative pressure device (2) and nested outside the central column (302).

7. The negative pressure drainage device with selectable negative pressure according to claim 1, characterized in that: The guide groove (402) is an arc groove, with one end close to the central column (302) and the other end away from the central column (302).

8. The negative pressure drainage device with selectable negative pressure according to claim 7, characterized in that: The guide groove (402) has three limiting grooves formed on one side, and the support bar (301) has a protruding ridge that cooperates with the limiting grooves on one side.

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