Drainage catheter

Abstract

The drainage catheter comprises a supporting element and at least one drainage tube, the drainage tube is provided with a drainage channel and a plurality of through holes, the drainage channel extends from one end of the drainage tube to the other end of the drainage tube, and the through holes are formed in the side wall of the drainage tube and communicated with the drainage channel. Wherein the drainage tube is spirally wound on the supporting element, and the extension direction of the drainage tube is at least partially the same as that of the supporting element.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a drainage catheter. BACKGROUND

[0002] The drainage catheter is generally used after surgery, mainly used for guiding the pus, waste blood and waste liquid accumulated in the human tissue or body cavity to the outside of the body to prevent postoperative infection and promote wound healing.

[0003] The current drainage catheter is a hollow straight tube, one end or part of the hollow tube is placed in the human tissue or body cavity, and the other end is located outside the human body. The pus, waste blood and waste liquid in the human body are guided to the outside of the human body by gravity or negative pressure.

[0004] However, the drainage efficiency of the current drainage catheter depends on the caliber of the catheter. The larger the caliber, the higher the drainage efficiency. However, if the caliber is too large, it will increase the pain of the patient, and a larger negative pressure needs to be configured, which cannot be compatible with the advantages of small caliber and high drainage efficiency. CONTENT OF THE INVENTION

[0005] One object of the present application is to provide a drainage catheter, wherein the drainage catheter can improve the drainage efficiency through its spiral shape, and the through hole is provided on the wall of the drainage catheter, which can ensure a high drainage efficiency when the caliber is small.

[0006] One object of the present application is to provide a drainage catheter, wherein the drainage catheter can be suitable for drainage work when the wound is small and the tissue in the wound is attached to the outer wall of the drainage tube.

[0007] One object of the present application is to provide a drainage catheter, wherein one end of the drainage tube is a closed end, and the other end is an open end. When the open end of the drainage tube is connected to a negative pressure device, both ends of the drainage tube are blocked, and the negative pressure device can produce a good negative pressure effect in the drainage tube with a small power.

[0008] One object of the present application is to provide a drainage catheter, wherein the material of the drainage tube is deformable. The drainage tube contacts the tissue in the human body during being inserted into the human body. According to the deformable property of the drainage tube, it can not only conveniently enter the human body, but also can reduce the pain caused thereby.

[0009] One object of the present application is to provide a drainage catheter, wherein the closed end of the drainage tube inserted into the human body is a smooth curved surface. When the drainage tube is inserted into the human body, the edges and corners of the end of the drainage tube can be avoided to contact the tissue in the human body, thereby reducing the pain caused thereby.

[0010] One object of the present application is to provide a drainage catheter, wherein the drainage tube can be inserted into the human body together with a medicine stick, and the wound of the human body can be treated while the drainage is being performed.

[0011] Other advantages and features of the present application will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the application.

[0012] According to one aspect of the present application, a drainage catheter capable of achieving the aforementioned objects and other objects and advantages includes:

[0013] a support element; and

[0014] at least one drainage tube, wherein the drainage tube has a drainage channel extending from one end to another end of the drainage tube, and a plurality of through-holes arranged on the side wall of the drainage tube and communicating with the drainage channel, wherein the drainage tube is spirally wound on the support element, and the extension direction of the drainage tube and the extension direction of the support element are at least partially the same.

[0015] In some embodiments, one end of the drainage tube is fixedly connected to the support element, and the other end of the drainage tube is dispersedly arranged with the support element.

[0016] In some embodiments, the end of the drainage tube fixedly connected to the support element is a closed end, and the closed end is a smooth curved surface.

[0017] In some embodiments, the support element has at least two opposite ends, one end of the drainage tube fixedly connected to the support element is aligned with one end of the support element, and the other end of the drainage tube is dispersedly arranged with the other end of the support element opposite to the one end.

[0018] In some embodiments, the support element is in the shape of a long rod, and the drainage catheter is spirally wound on the long rod.

[0019] In some embodiments, the support element is in the shape of a spiral matching the drainage tube, and the support element and the drainage tube are spirally wound together.

[0020] In some embodiments, the support element is another drainage tube.

[0021] In some embodiments, when the at least one drainage tube and the other drainage tube are spirally wound, the outer walls of the drainage tubes are fitted to form a drainage channel, the through-holes are located on the path of the drainage channel, and / or the through-holes are located on the outer walls of the drainage tubes away from the axis of the drainage catheter at the bending positions.

[0022] In some embodiments, when the number of the drainage tubes is two or more, the plurality of the drainage tubes are symmetrically wound on the support element.

[0023] In some embodiments, the drainage tube is a transparent rubber tube.

[0024] In some embodiments, the plurality of the through holes are sequentially arranged along the extension direction of the drainage tube.

[0025] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the present application.

[0027] Figure 2 is a structural schematic diagram of a preferred embodiment of the present application.

[0028] Figure 3 is a structural schematic diagram of another preferred embodiment of the present application.

[0029] Figure 4 is a structural schematic diagram of another preferred embodiment of the present application. DETAILED DESCRIPTION

[0030] The following description is provided so that others skilled in the art can have the best possible understanding of the present application. The preferred embodiments described in the following description are only examples of the present application. Those skilled in the art can devise other obvious modifications to the preferred embodiments without departing from the spirit and scope of the present application. The basic principles defined in the following description of the present application can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0031] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0032] Referring to Figure 1 The present application provides a drainage catheter 10, comprising:

[0033] a support element 11; and

[0034] at least one drainage tube 12, wherein the drainage tube 12 has a drainage channel 122 extending from one end of the drainage tube 12 towards the other end, and a plurality of through holes 121 arranged on the side wall of the drainage tube 12 and communicating with the drainage channel 122, wherein the drainage tube 12 is spirally wound on the support element 11, the length dimension of the drainage tube 12 matches the length dimension of the support element 11, and the extension direction of the drainage tube 12 is at least partially the same as the extension direction of the support element 11.

[0035] Because the side wall of the drainage tube 12 is provided with a plurality of through holes 121, after one end of the drainage catheter 10 is inserted into the human body, pus, waste blood and the like can enter the drainage channel 122 of the drainage tube 12 through the through holes 121 of the drainage tube 12, and be drained to the outside of the body along the drainage channel 122 of the drainage tube 12.

[0036] The spiral shape of the drainage tube 12 has better drainage effect, and when the drainage catheter 10 is used to drain pus, blood stasis and the like in the human body, the drainage speed is faster and more unobstructed.

[0037] Because the pipe wall of the drainage tube 12 is provided with a plurality of through holes 121, a plurality of channels are provided for pus, waste blood and the like in the human body to enter the drainage channel 122 of the drainage tube 12, so that the drainage tube 12 has higher drainage efficiency, and under the premise of ensuring higher drainage efficiency, the outer diameter of the drainage tube 12 can be set to a smaller size, reducing the pain caused when extending into the human body. And by setting the outer diameter of the drainage tube 12 to a smaller size, the drainage tubes 12 of different outer diameters have smaller drainage channel 122 spaces under the same length, and under the same negative pressure, the power requirement of the external negative pressure equipment can be reduced, and the noise, vibration and the like generated by the negative pressure equipment under lower use power are also smaller, providing a quiet and comfortable environment for patients, and the reduction of the power requirement of the negative pressure equipment can reduce the procurement cost of the equipment.

[0038] The support element 11 is used to support the drainage tube 12, so that the drainage tube 12 extends in a spiral shape. However, the overall strength of the drainage tube 12 is low due to the small outer diameter of the tube and the need to be arranged in a spiral shape, so that the drainage tube 12 is difficult to be inserted into the preset position when it is inserted into the human body under the interference of the tissues in the human body, or the drainage effect is poor due to the deformation of the drainage tube 12 under the interference of the tissues in the human body. The drainage tube 12 is spirally wound on the support element 11, so that when the drainage catheter 10 is inserted into the human body, the support element 11 can keep the drainage tube 12 in a spiral state and enter the human body, ensuring that the drainage tube 12 can reach the preset position and has good drainage efficiency.

[0039] The drainage tube 12 is deformable, so that the drainage tube 12 can automatically deform along the tissues in the human body when the drainage catheter 10 is inserted into the human body, so that the drainage catheter 10 can be conveniently inserted into the human body, and the pain caused thereby can be alleviated.

[0040] Preferably, the material of the drainage tube 12 is silicone rubber.

[0041] The drainage tube 12 is a transparent tube, and the tube body of the drainage tube 12 is transparent, so that the inside of the drainage tube 12 can be visualized. When the drainage catheter 10 is used for drainage of pus, waste blood, etc., it is convenient for the staff to observe the inside of the drainage tube 12 in real time, and by observing the flow of pus, waste blood, etc. in the drainage tube 12, it can be judged whether the drainage tube 12 reaches the preset position or is in a normal working state, and when an abnormality is found, the staff can quickly respond.

[0042] Referring to Figure 2 In some embodiments, the support element is a vertical rod 13, and the rod 13 is a hard object. The drainage tube 12 is spirally wound on the rod 13, and the rod 13 is used to provide support for the drainage tube, so that the drainage tube 12 is kept in a spiral shape. When the human body is treated, the rod 13 of the drainage catheter 10 is inserted into the human body, and the rod 13 drives the drainage tube 12 to enter the human body in a spiral shape. When the drainage tube 12 reaches the working position, pus, waste blood, etc. in the human body enter the drainage channel 122 of the drainage tube 12 under the guidance of the through hole 121 of the drainage tube 12, and are discharged out of the human body through the drainage channel 122 of the drainage tube 12, and the drainage channel 122 of the drainage tube 12 discharges pus, waste blood, etc. by gravity or is connected to a negative pressure device.

[0043] The drainage tube 12 is spirally wound on the rod 13, and the connection between the drainage tube 12 and the rod 13 is fixed connection. The fixed connection mode of the drainage tube 12 and the rod 13 is determined according to the material of the drainage tube 12. When the material of the drainage tube 12 is silicone rubber, the drainage tube 12 and the rod 13 are connected together by glue or hot melting.

[0044] The first end 123 of the drainage tube 12 is fixedly connected with the front end 132 of the rod 13, the tube body of the drainage tube 12 is spirally wound on the rod of the rod 13 and is fixedly connected at the connection, so as to ensure the strength of the fixed connection between the drainage tube 12 and the rod 13, and firmly connect the drainage tube 12 and the rod 13 together. The second end 124 of the drainage tube 12 and the rear end 133 of the rod 13 are in a dispersed state, that is, the second end 124 of the drainage tube 12 and the rear end 133 of the rod 13 are in an unconnected state, so as to facilitate the connection of the second end 123 of the drainage tube 12 to a container for receiving pus, waste blood and the like, or facilitate the connection of the second end 123 of the drainage tube 12 to a negative pressure device.

[0045] The fixedly connected end of the drainage tube 12 and the rod 13 is aligned, so as to facilitate the user to control the position of the drainage tube 12 when the drainage catheter 10 is inserted into the human body, so that the drainage tube 12 is accurately sent to the preset position, and the drainage effect of the drainage catheter 10 is ensured.

[0046] The drainage tube 12 is spirally wound on the rod 13, and the drainage tube 12 has a spiral shape with an axis. The through hole 121 is arranged on the tube wall away from the axis of the drainage tube 12 on both sides, that is, the tube wall of the drainage tube 12 close to the axis is attached to the rod 13, and the tube wall of the drainage tube 12 away from the axis is the opposite tube wall of the tube wall of the drainage tube 12 close to the axis. The through hole 121 is arranged on the tube wall between the two opposite tube walls. When the drainage catheter 10 is inserted into a small wound in the human body, the drainage catheter 10 will be wrapped by the internal tissue at the wound, so that the tube wall of the drainage tube 12 away from the axis of the drainage tube 12 is contacted by the internal tissue at the wound. If the through hole 121 is arranged on the tube wall of the drainage tube 12 away from the axis of the drainage tube 12, the through hole 121 on the tube wall of the drainage tube 12 away from the axis of the drainage tube 12 will be blocked by the internal tissue at the wound, so that the pus, waste blood and the like in the wound cannot be guided out of the drainage channel 122 of the drainage tube 12 through the through hole 121 of the drainage tube 12. The spiral shape of the drainage tube 12 has a bending shape, and at this time the through holes 121 on both sides of the tube wall of the drainage tube 12 away from the axis still have the drainage effect, so as to ensure the normal operation of the drainage work of the drainage catheter 10.

[0047] The plurality of through holes 121 are arranged in sequence along the extension direction of the drainage tube 12, so that the pus, waste blood and the like in the wound can flow into the drainage channel 122 of the drainage tube 12 through the through holes 121 of the drainage tube 12 in a relatively balanced manner.

[0048] The number of the drainage tube 12 is not limited, and should be determined according to the maximum and minimum number of the drainage tube 12 that can be adapted to the size of the drainage tube 12 and the size of the rod 13. When the number of the drainage tube 12 is a plurality, the plurality of drainage tubes 12 are spirally wound on the rod 13.

[0049] Preferably, the plurality of drainage tubes 12 are symmetrically spirally wound on the rod 13, which is beneficial to balanced drainage of pus, waste blood and the like in the human body wound.

[0050] The end of the drainage tube 12 inserted into the human body is different on the drainage tube 12 with different outer diameter specifications.

[0051] The outer diameter of the drainage tube 12 is relatively large, and the space in the drainage channel 122 of the corresponding drainage tube 12 is also relatively large. When the negative pressure device is connected subsequently, the space of the drainage channel 122 of the drainage tube 12 is relatively large, which can cause a weak negative pressure effect or the power of the negative pressure device needs to be improved. Therefore, the port of the end of the drainage tube 12 inserted into the human body is a closed end, i.e., the first end 123 of the drainage tube 12, and the other end of the drainage tube 12 opposite to the closed end is an open end, i.e., the second end 124 of the drainage tube 12. When the open end is connected with the negative pressure device, the open end of the drainage tube 12 is blocked by the negative pressure device, so that the communication passage between the drainage channel 122 of the drainage tube 12 and the outside is the through hole 121 of the drainage tube 12, and the space in the drainage channel 122 is relatively closed. At this time, the vacuum extraction at the open end of the drainage tube 12 by the negative pressure device can achieve a better negative pressure effect. When the negative pressure device extracts gas in the drainage tube 12, because the first end 123 of the drainage tube 12 is closed, a gas pressure difference is generated between the drainage tube 12 and the human body, which promotes the pus, waste blood and the like to flow into the drainage channel 122 of the drainage tube 12 through the through hole 121 of the drainage tube 12.

[0052] The first end 123 of the drainage tube 12 is a closed end and a smooth curved surface. When the drainage tube 12 is inserted into the human body, the edges of the port of the drainage tube 12 can be prevented from contacting the tissues in the human body, thereby increasing the pain of the patient.

[0053] The drainage tube 12 has a small diameter, and the space in the drainage channel 122 of the drainage tube 12 is also small. The negative pressure device is connected to the open end of the drainage tube 12, i.e. the second end 124 of the drainage tube 12. When a negative pressure environment is created in the drainage channel 122 of the drainage tube 12, it can easily cause the pus, waste blood, etc. in the human body to flow into the drainage channel 122 of the drainage tube 12 through the through hole 121 of the drainage tube 12. The second end 124 of the drainage tube 12 extending into the human body is an open end, i.e. not blocked, so that the pus, waste blood, etc. in the human body can quickly enter the drainage channel 122 of the drainage tube 12 through the second end 124 of the drainage tube 12. At the same time, the pus, waste blood, etc. in the human body can also flow into the drainage channel 122 of the drainage tube 12 through the through hole 121 of the drainage tube 12. Under the joint action of the through hole 121 of the drainage tube 12 and the second end 124 of the drainage tube 12, the drainage effect of the drainage catheter 10 is ensured.

[0054] Referring to Figure 3 In one embodiment, the support element is a spiral tube 14 that is spirally matched and structurally consistent with the drainage tube 12. The drainage tube 12 and the spiral tube 14 are connected together by being spirally wound with each other. The drainage tube 12 and the spiral tube 14 support each other, which makes the structure of the drainage catheter 10 more stable and less likely to be deformed when extending into the human body due to being pressed by the tissues in the human body. Both the drainage tube 12 and the spiral tube 14 can play a drainage role, and under the joint action of the drainage tube 12 and the spiral tube 14, pus, waste blood, etc. can be more efficiently discharged out of the human body, and the drainage efficiency is high.

[0055] When the drainage tube 12 and the spiral tube 14 are spirally wound with each other, the connection mode of the drainage tube 12 and the spiral tube 14 is fixed connection. The drainage tube 12 and the spiral tube 14 are fixedly connected together by means of glue or heat melting.

[0056] Preferably, the material of the spiral tube 14 is also silicone rubber, and the spiral tube 14 is also a transparent tube.

[0057] One end of the drainage tube 12 and the spiral tube 14 is fixedly connected together by means of glue or heat melting. When the drainage tube 12 and the spiral tube 14 are spirally wound, the connection parts of the tube bodies of the drainage tube 12 and the spiral tube 14 are fixedly connected together by means of glue or heat melting. The other end of the drainage tube 12 and the spiral tube 14 is arranged in a scattered manner, which is convenient for external connection of a container or a negative pressure device.

[0058] The fixed connection end of the drainage tube 12 and the fixed connection end of the spiral tube 14 are aligned with each other, and the two tubes are aligned at the end that extends into the human body. After the fixed connection end of the drainage tube 12 and the fixed connection end of the spiral tube 14 are aligned, they are inserted into the human body. This helps the user accurately control the orientation of the drainage catheter 10, avoiding the situation where the fixed connection end of the drainage tube 12 or the fixed connection end of the spiral tube 14 is not aligned, and the longer end of the drainage tube 12 or the spiral tube 14 first contacts the tissue in the human body and cannot be inserted further, or if it is inserted further, it will cause pain to the human body. By aligning and fixedly connecting the ends of the drainage tube 12 and the spiral tube 14, the lengths of the drainage tube 12 and the spiral tube 14 inserted into the human body can be made consistent, preventing the drainage efficiency of the drainage tube 12 and the spiral tube 14 from being inconsistent.

[0059] In the drainage tube 12 and the spiral tube 14 with a larger outer diameter, the drainage channel 122 of the drainage tube 12 and the internal space 144 of the spiral tube 14 are correspondingly larger. When the drainage catheter 10 is used with a negative pressure device, the space in the two tubes is larger, so the negative pressure device needs to be powered up to a larger power to create a vacuum to ensure the drainage efficiency. Therefore, the first end 123 of the drainage tube 12 and the built-in end 142 of the spiral tube 14 are closed ends, and the second end 124 of the drainage tube 12 and the external end 143 of the spiral tube 14 are open ends. The second end 124 of the drainage tube 12 and the external end 143 of the spiral tube 14 are connected to the negative pressure device, and a vacuum is created in the drainage tube 12 and the spiral tube 14 by the negative pressure device. Because the first end 123 of the drainage tube 12 and the built-in end 142 of the spiral tube 14 are closed, and the second end 124 of the drainage tube 12 and the external end 143 of the spiral tube 14 are connected to the negative pressure device, the space inside the drainage tube 12 and the spiral tube 14 is relatively closed, and only the through hole 121 of the drainage tube 12 and the hole 141 of the spiral tube 14 are in communication with the outside. When the negative pressure device creates a vacuum in the drainage tube 12 and the spiral tube 14, it promotes the efficient flow of pus, waste blood, and other substances in the human body through the through hole 12 into the drainage channel 122 of the drainage tube 12, improving the drainage efficiency.

[0060] The first end 123 of the drainage tube 12 and the built-in end 142 of the spiral tube 14 are closed ends and smooth curved surfaces. When the drainage tube 12 and the spiral tube 14 are inserted into the human body, the end of the drainage tube 12 and the spiral tube 14 that contacts the human body is a smooth curved surface, which can reduce the pain of the patient.

[0061] In the small outer diameter of the drainage tube 12 and the spiral tube 14, the drainage channel 122 of the drainage tube 12 and the internal space 144 of the spiral tube 14 are also small. When the drainage catheter 10 is connected with the negative pressure device, the negative pressure device can easily make the pus, waste blood and the like flow out of the body through the drainage channel 122 of the drainage tube 12 and the internal space 144 of the spiral tube 14 under small output power. Therefore, the open end of the drainage tube 12 and the spiral tube 144 connected and aligned is an open end, that is, an unsealed state. The open end of the drainage tube 12 and the spiral tube 14 and the through hole 121 of the drainage tube 12 and the hole 141 of the spiral tube 14 can jointly act to discharge the pus, waste blood and the like in the human body out of the body.

[0062] The drainage tube 12 and the spiral tube 14 are spirally wound with each other, have an axisymmetric shape, and the peripheral walls of the drainage tube 12 and the spiral tube 14 are smooth curved surfaces. When the drainage catheter 10 is inserted into the wound in the human body, it can enter by rotation, which is convenient, efficient and does not cause pain to the patient.

[0063] When the treated wound is small, the drainage catheter 10 is inserted into the human body, and the tissue in the human body wraps the drainage catheter 10, so that the outer walls of the drainage tube 12 and the spiral tube 14 are attached to the tissue in the human body. The drainage tube 12 and the spiral tube 14 are arranged in a spiral structure, so that the drainage tube 12 and the spiral tube 14 have a bent shape. The bent part of the drainage tube 12 and the spiral tube 14 supports the tissue in the human body, and the outer walls of the drainage tube 12 and the spiral tube 14 form a spiral drainage channel 15 at the contact position. When the wound is small, the pus, waste blood and the like in the wound can also be discharged through the spiral drainage channel 15.

[0064] Preferably, the through hole 121 of the drainage tube 12 and the hole 141 of the spiral tube 14 are arranged on the path of the spiral drainage channel 15. When the pus, waste blood and the like in the wound flow on the spiral drainage channel 15, they flow into the drainage channel 122 of the drainage tube 12 and the internal space 144 of the spiral tube 14 through the through hole 121 of the drainage tube 12 and the hole 141 of the spiral tube 14, respectively. When the wound is too small, the tissue in the human body wraps the peripheral walls of the drainage tube 12 and the spiral tube 14, so that the pus, waste blood and the like in the human body cannot enter the through hole 121 of the drainage tube 12 and the hole 141 of the spiral tube 14, thereby preventing the drainage work.

[0065] In the treatment of larger wounds, the through holes 121 of the drainage tube 12 and the holes 141 of the spiral tube 14 can be arranged on the path of the spiral drainage channel 15, and can also be arranged on the side wall of the bending part of the drainage tube 12 away from the axis of the spiral shape of the drainage tube 12, that is, the through holes 121 of the drainage tube 12 and the holes 141 of the spiral tube 14 are located in the concave part of the inward spiral shape of the drainage tube 12 and the convex part of the outward spiral shape of the drainage tube 12 at the same time. The spiral drainage channel 15 has a better drainage effect due to the spiral shape of the path, so that the pus, waste blood and the like flowing through the spiral drainage channel 15 enter the drainage channel 122 of the drainage tube 12. The convex part of the bending part of the drainage tube 12 is also in direct contact with the pus, waste blood and the like in the wound, and the through holes 121 of the drainage tube 12 at the convex part of the bending part can drain the pus, waste blood and the like, thereby improving the drainage efficiency.

[0066] The number of the drainage tube 12 is not limited, and the maximum number of the drainage tube 12 and the minimum number of the drainage tube 12 that can be adapted to the size of the drainage tube 12 and the spiral tube 141 should be determined. When the number of the drainage tube 12 is two or more, that is, one spiral tube 14 and two or more drainage tubes 12, one end of the two or more drainage tubes 12 is aligned and fixedly connected, the spiral tube 14 and the two or more drainage tubes 12 are spirally wound with each other, and an axisymmetric structure is formed, and the other end of the two or more drainage tubes 12 is dispersedly arranged.

[0067] Referring to Figure 4 In some embodiments, the support element is a medicine stick 16, which can be a medicine stick made of medicinal materials having the effect of removing pus and removing corruption. The drainage tube 12 is spirally wound on the medicine stick 16, which can support the drainage tube 12, so that the drainage tube 12 does not deform when it is inserted into the human body, thereby ensuring the drainage effect. Moreover, while the drainage tube 12 is draining pus, waste blood and the like in the human body, the components of the medicine stick 16 can also have a therapeutic effect on the wound, thereby accelerating the healing of the wound.

[0068] The first end 123 of the drainage tube 12 is aligned with one end 161 of the medicine stick 16 and is fixedly connected, the tube body of the drainage tube 12 is in contact with the stick body of the medicine stick 16 at a fixed connection, and the second end 124 of the drainage tube 12 is dispersedly arranged with the other end 162 of the medicine stick 16. The end of the drainage tube 12 and the medicine stick 16 that is aligned and fixedly connected, that is, the end inserted into the human body, and the second end 124 of the drainage tube 12 is connected to an external container or a negative pressure device.

[0069] The shape of the medicine stick 16 can be a rod shape, or a spiral shape matching the shape of the drainage tube 12.

[0070] When the medicine stick 16 is in a rod shape, one end of the drainage tube 12 is aligned with one end of the medicine stick 16, and the drainage tube 12 is spirally wound on the rod of the medicine stick 16.

[0071] When the medicine stick 16 is in a spiral shape, the first end 123 of the drainage tube 12 is aligned and fixedly connected with one end 161 of the medicine stick, the tube body of the drainage tube 12 and the rod body of the medicine stick 16 are spirally wound together, and the second end 124 of the drainage tube 12 is dispersedly arranged with the other end 161 of the medicine stick 16, in an axial symmetry shape.

[0072] In the drainage tube 12 with a larger outer diameter, the internal space is also correspondingly larger, the port of the aligned end of the drainage tube 12 with the medicine stick 16 is a closed end, that is, the first end 123 of the drainage tube 12, and the second end 124 of the drainage tube 12 is connected to a negative pressure device, and a vacuum is drawn in the drainage tube 12 by the negative pressure device. Since the first end 123 of the drainage tube 12 is closed and the second end 124 is connected to the negative pressure device, the space in the drainage tube 12 is relatively closed, and only the through hole 121 of the drainage tube 12 is in communication with the outside. When the negative pressure device draws a vacuum in the drainage tube 12, only relatively small power is needed to cause pus, waste blood, etc. in the human body to enter the drainage tube 12 through the through hole 121, thereby improving the drainage efficiency.

[0073] Moreover, the first end 123 of the drainage tube 12 is a closed end and a smooth curved surface, which can reduce the pain of the human body when the first end 123 of the drainage tube 12 is inserted into the human body and contacts the human body.

[0074] In the drainage tube 12 with a smaller outer diameter, the internal space is also correspondingly smaller, and when the drainage tube 12 is connected to the negative pressure device, the smaller power of the negative pressure device can easily cause pus, waste blood, etc. to be introduced into the drainage channel 122 of the drainage tube 12 through the through hole 121 of the drainage tube 12, and then be discharged out of the human body. The connected and aligned end of the drainage tube 12 is an open end, that is, the first end 123 is in an unsealed state. In the drainage work of the drainage tube 12 with a smaller outer diameter, pus, waste blood, etc. in the human body can be introduced into the drainage channel 122 of the drainage tube 12 through the combined action of the through hole 121 of the drainage tube 12 and the first end 123 of the drainage tube 12, thereby ensuring the drainage efficiency of the drainage catheter 10.

[0075] The number of the drainage tubes 12 is not limited, and should be adapted to the maximum and minimum number of the drainage tubes 12 according to the size of the drainage tubes 12 and the size of the medicine stick 16. When the number of the drainage tubes 12 is multiple, the multiple drainage tubes 12 are spirally wound on the medicine stick 16, the first ends 123 of the multiple drainage tubes 12 are aligned and fixedly connected with one end 161 of the medicine stick 16, the tube bodies of the multiple drainage tubes 12 are spirally wound on the stick body of the medicine stick 16, and the second ends 124 of the multiple drainage tubes 12 are dispersedly arranged with the other end 162 of the medicine stick 16.

[0076] Preferably, the multiple drainage tubes 12 are symmetrically spirally wound on the medicine stick 16. The symmetrically distributed drainage tubes 12 can make the drainage catheter 10 more balanced in draining pus, waste blood and the like in the human body.

[0077] The embodiments of the multiple embodiments can be freely combined, and the utility model is not limited in any way.

[0078] Those skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be changed or modified in any way without departing from the principle.

Claims

1. A drainage catheter, characterized in that The application relates to a drainage device, comprising: a support element; and at least one drainage tube, wherein the drainage tube has a drainage channel extending from one end of the drainage tube towards the other end and a plurality of through-holes arranged on the side wall of the drainage tube and communicating with the drainage channel, wherein the drainage tube is spirally wound on the support element, and the extending direction of the drainage tube and the extending direction of the support element are at least partially the same. One end of the drainage tube is fixedly connected to the support element, and the other end of the drainage tube is arranged away from the support element.

2. The drainage catheter of claim 1, wherein: The end of the drainage tube fixedly connected to the support element is a closed end, and the closed end is a smooth curved surface.

3. The drainage catheter of claim 2, wherein: The support element has at least two opposite ends, one end of the drainage tube fixedly connected to the support element is aligned with one end of the support element, and the other end of the drainage tube is arranged away from the other end of the support element.

4. The drainage catheter of claim 2, wherein: The support element is in the shape of a long rod, and the drainage tube is spirally wound on the long rod.

5. The drainage catheter of claim 1, wherein: The support element is in the shape of a spiral matched with the drainage tube, and the support element and the drainage tube are spirally wound together.

6. The drainage catheter of claim 1, wherein: The support element is a spiral tube, and the spiral tube is spirally matched with the drainage tube.

7. The drainage catheter of claim 6, wherein: When the at least one drainage tube is spirally wound with the spiral tube, the outer wall between the drainage tube and the spiral tube is matched to form a drainage channel, the through-holes are located on the path of the drainage channel, and / or the through-holes are located on the outer wall of the drainage tube and / or the spiral tube away from the axis of the drainage tube at the bending position.

8. The drainage catheter of claim 7, wherein: When the number of the drainage tubes is two or more, the plurality of drainage tubes are symmetrically wound on the support element.

9. The drainage catheter of claim 1, wherein: The drainage tube is a transparent rubber tube, and the plurality of through-holes are sequentially arranged along the extending direction of the drainage tube.

10. The drainage catheter of any of claims 1-9, wherein: ​

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