Split type catheter

Abstract

The application discloses a split catheter, which comprises a front catheter body for entering the body, a group of front fluid channels arranged in the front catheter body, and rear ends of the front fluid channels penetrating through the rear end surface of the front catheter body; a rear catheter body for remaining outside the body, a group of rear fluid channels arranged in the rear catheter body, and the rear fluid channels penetrating through the front and rear end surfaces of the rear catheter body; the group of rear fluid channels corresponding to the group of front fluid channels one by one; and a hose connecting structure, both ends of the hose connecting structure being provided with a group of plug-in parts matched with a group of fluid channels of the corresponding catheter body; when each plug-in part at one end of the hose connecting structure is arranged in the corresponding front fluid channel and is in sealed connection with the inner side wall of the front fluid channel, and each plug-in part at the other end of the hose connecting structure is arranged in the corresponding rear fluid channel and is in sealed connection with the inner side wall of the rear fluid channel, the front fluid channels and the rear fluid channels are in corresponding communication.

Description

Technical Field

[0001] This invention relates to the field of catheter technology, and more specifically to a split-type urinary catheter that is easy to insert into the bladder. Background Technology

[0002] A urinary catheter is a tube inserted into the bladder through the urethra to drain urine. It is made of natural rubber, silicone rubber, or polyvinyl chloride.

[0003] Existing urinary catheters include single-lumen, double-lumen, and triple-lumen catheters. Among them, the triple-lumen catheter has three tail tubes at the end for fluid inlet, fluid outlet, and air inlet, and the tail section is relatively large.

[0004] The commonly used method for inserting a urinary catheter involves inserting a guidewire through the sheath of the electrosurgical resectoscope into the bladder before the sheath is withdrawn from the urethra. The guidewire is then retained, the sheath is withdrawn, the catheter is inserted along the guidewire, and finally, the guidewire is removed. This series of procedures includes four steps: inserting the guidewire, withdrawing the sheath, inserting the catheter along the guidewire, and withdrawing the guidewire. Compared to the simple purpose of catheter insertion, this method requires more steps. Furthermore, the purpose of inserting the guidewire is merely to guide the catheter; this step increases medical costs and also increases the various risks associated with inserting an instrument into the body.

[0005] Furthermore, during the use of urinary catheters in urology, the inventors discovered that for some patients with benign prostatic hyperplasia or urethral obstruction, the conventional method described above makes it difficult to insert the catheter into the bladder. Because the junction between the urethral tip and the bladder is not smooth, the catheter may become stuck at the bladder opening and unable to enter the bladder, making postoperative irrigation difficult. Therefore, the aforementioned method using a guidewire for insertion is technically challenging and has a limited success rate. Summary of the Invention

[0006] Purpose of the invention: The technical problem to be solved by the present invention is to provide a split-type urinary catheter that is easy to insert into the bladder and at the same time reduces the patient's pain during insertion, in order to address the shortcomings of the prior art.

[0007] To address the aforementioned technical problems, this invention discloses a split-type urinary catheter. The split-type urinary catheter comprises:

[0008] The pre-catheter body for insertion into the body has a set of pre-fluid channels inside, and the rear end of each pre-fluid channel penetrates the rear end face of the pre-catheter body.

[0009] The posterior catheter body is used to remain outside the body. The posterior catheter body is provided with a set of posterior fluid channels inside. Each of the posterior fluid channels penetrates the front end face and the rear end face of the posterior catheter body. The set of posterior fluid channels is provided in a one-to-one correspondence with the set of anterior fluid channels.

[0010] The system includes a hose connection structure, with each end of the hose connection structure having a set of insertion parts that match a set of fluid channels of the corresponding catheter body. When each insertion part at one end of the hose connection structure passes through each of the corresponding anterior fluid channels of the anterior catheter body and is sealed to the inner wall of the anterior fluid channel, and each insertion part at the other end of the hose connection structure passes through each of the corresponding posterior fluid channels of the posterior catheter body and is sealed to the inner wall of the posterior fluid channel, each anterior fluid channel corresponds to and communicates with each posterior fluid channel.

[0011] Specifically, the flexible hose connection structure includes a set of independent communicating channels disposed inside the flexible hose connection structure. The two corresponding insertion portions at both ends of the flexible hose connection structure are connected one-to-one through the communicating channels.

[0012] Specifically, the set of anterior fluid channels includes an anterior flushing channel, an anterior water injection channel, and an anterior return channel. The set of posterior fluid channels includes a posterior flushing channel, a posterior water injection channel, and a posterior return channel. A fixation balloon is fitted onto the indwelling end of the anterior catheter body, and the anterior water injection channel connects to the fixation balloon. A flushing hole and a return hole are provided at the front end of the side wall of the anterior catheter body; the flushing hole connects to the anterior flushing channel, and the return hole connects to the anterior return channel. The posterior flushing channel connects to an external infusion tubing. The posterior water injection channel connects to the water injection balloon. The posterior return channel is used for fluid return.

[0013] Optionally, the hose connection structure is an integral structure, and at least one end of the hose connection structure is connected to the corresponding end of the catheter body in a plug-in manner.

[0014] Specifically, the outer wall surface of the insertion part is a conical surface, and the outer diameter of the insertion part gradually increases in the insertion direction of the corresponding end of the catheter body. When the insertion part is inserted into the fluid channel of the corresponding end of the catheter body, the outer wall surface of the insertion part expands and fits against the inner wall surface of the fluid channel.

[0015] Specifically, the insertion portions at the corresponding ends of the anterior catheter body and the hose connection structure are formed into a composite structure through a secondary compression molding process, and each of the insertion portions at the other end of the hose connection structure is removably inserted into the corresponding posterior fluid channel in the posterior catheter body.

[0016] Alternatively, the insertion portions of the corresponding ends of the posterior catheter body and the hose connection structure are fixedly connected by a secondary compression molding process to form an integral structure, and each of the insertion portions at the other end of the hose connection structure is removably inserted into the corresponding anterior fluid channel in the anterior catheter body.

[0017] Alternatively, each of the insertion portions at one end of the tubular connection structure may be removably inserted into the corresponding anterior fluid channel in the anterior catheter body, and each of the insertion portions at the other end of the tubular connection structure may be removably inserted into the corresponding posterior fluid channel in the posterior catheter body.

[0018] Optionally, the hose connection structure comprises a connector and a receiver, which are separate components. One set of connectors is located at one end of the connector, and the other set is located at one end of the receiver. One of the anterior and posterior catheter bodies forms a composite structure with the end of the connector containing the connector through a secondary compression molding process. The other of the anterior and posterior catheter bodies forms a composite structure with the end of the receiver containing the connector through a secondary compression molding process. The other end of the connector and the other end of the receiver are connected by a socket sealing structure.

[0019] Specifically, the sealing socket structure includes a set of sockets at one end of the insert and a set of sockets at the other end of the receiver. Each set of sockets corresponds to one set of sockets, and each socket and its corresponding socket are interference-fitted. The outer wall of the socket and the inner wall of the socket are both conical surfaces. The diameter of the outer wall of the socket gradually increases in the insertion direction of the corresponding socket, while the diameter of the inner wall of the socket gradually decreases in the insertion direction of the corresponding socket.

[0020] Specifically, the material of the hose connection structure is metal or plastic.

[0021] Specifically, the materials of the anterior catheter body and the posterior catheter body are silicone rubber or natural rubber.

[0022] Beneficial effects:

[0023] (1) The catheter of this application is a split-type catheter. During use, with the outer sheath of the electroresection scope still in place, the anterior catheter body is inserted into the body through the outer sheath. The outer sheath is a 9mm inner diameter metal tube, allowing surgical instruments to be directly inserted into the bladder for appropriate medical procedures. Postoperatively, with the outer sheath still in place, the anterior catheter body is easily inserted into the bladder using the outer sheath as a channel. The outer sheath is then removed, and the posterior catheter body is connected to the posterior catheter body via a flexible tube connection structure. Subsequently, liquid or gas is injected into the fixation balloon through the posterior water inlet channel, causing the balloon to inflate beyond the diameter of the bladder opening, thus fixing the catheter in a relatively fixed position and preventing it from slipping out of the bladder during irrigation. Irrigation fluid is then injected through the posterior irrigation channel. The fluid enters the bladder through the anterior water inlet channel for irrigation, and the irrigated fluid returns to the catheter via the anterior return channel and is discharged through the posterior irrigation channel. Compared to conventional methods, this split-type urinary catheter eliminates the need for guidewire insertion and removal during bladder placement, effectively reducing the operational difficulty for medical staff. With the assistance of the outer sheath, the insertion success rate is high, which helps reduce medical costs, shorten surgical time, and improve medical efficiency. It also prevents excessive contact between the instrument and the bladder opening, reducing patient discomfort during insertion.

[0024] (2) In some embodiments of this application, the flexible tube connection structure is an integral structure, and at least one end of the flexible tube connection structure is connected to the corresponding end of the catheter body by a plug-in method. The plug-in method facilitates operation by medical personnel.

[0025] (3) In some embodiments of this application, the hose connection structure is a split structure, including a connector and a receiving component, which are connected by a socket sealing structure. The connection between the rigid connector and the rigid receiving component is easier to operate than the connection between the rigid hose connection structure and the flexible conduit, which is an integral structure. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0027] Figure 1 This is a front view of a split-type urinary catheter in an assembled state, which includes a hose connection structure with an integral structure, according to the first embodiment of this application.

[0028] Figure 2 for Figure 1 The image shows a right view of a split-type urinary catheter.

[0029] Figure 3 for Figure 2 A sectional view along line AA.

[0030] Figure 4 for Figure 3 A partially enlarged view of the indwelling end of the anterior catheter body in a split-type urinary catheter.

[0031] Figure 5 for Figure 1 The image shows a front view of a split-type urinary catheter in an unassembled state.

[0032] Figure 6 for Figure 5 The image shows a right view of a split-type urinary catheter in an unassembled state.

[0033] Figure 7 for Figure 6 Sectional view along line BB;

[0034] Figure 8 This is a front view of a split-type urinary catheter in an unassembled state, which includes a hose connection structure with an integral structure, according to a second embodiment of this application.

[0035] Figure 9 for Figure 8 The image shows an axial sectional view of a split-type urinary catheter in its unassembled state.

[0036] Figure 10 This is a front view of a split-type urinary catheter in an unassembled state, which includes a hose connection structure with an integral structure, according to the third embodiment of this application.

[0037] Figure 11 for Figure 10 The image shows an axial sectional view of a split-type urinary catheter in its unassembled state.

[0038] Figure 12 This is a front view of a split-type urinary catheter in its assembled state, which includes a split-type flexible tube connection structure according to the fourth embodiment of this application.

[0039] Figure 13 for Figure 12 The image shows a right view of a split-type urinary catheter.

[0040] Figure 14 for Figure 13 A cross-sectional view along the CC line;

[0041] Figure 15 This is an exploded view of the front view of a split-type urinary catheter with a split-type flexible tube connection structure, as shown in the fourth embodiment of this application.

[0042] Figure 16 for Figure 15 The image shows a right view of a split-type urinary catheter.

[0043] Figure 17 for Figure 16 A cross-sectional view along line DD.

[0044] The attached figures are labeled as follows:

[0045] The catheter includes a pre-catheter body 100, a pre-flushing channel 111, a pre-injection channel 112, a pre-return channel 113, an indwelling end 120, a fixation balloon 130, a flushing hole 140, a return hole 150, an injection hole 160, a posterior catheter body 200, a posterior flushing channel 211, a posterior injection channel 212, a posterior return channel 213, a tubular connection structure 300, a connector 310, a connecting channel 320, a connector 330, a socket 331, a receiving component 340, and a socket 341. Detailed Implementation

[0046] The technical solution of this application will now be described in detail with reference to the accompanying drawings.

[0047] The present invention provides a split-type urinary catheter, which includes a front urinary catheter body 100 for entering the body and a rear urinary catheter body 200 for remaining outside the body. The front urinary catheter body 100 and the rear urinary catheter body 200 are connected by a flexible tube connection structure 300.

[0048] The materials of the anterior catheter body 100 and the posterior catheter body 200 are usually silicone rubber or natural rubber, both of which are soft and easily expand and deform.

[0049] The pre-catheter body 100 has a set of pre-fluid channels inside, and the rear end of each pre-fluid channel penetrates the rear end face of the pre-catheter body 100.

[0050] The posterior catheter body 200 has a set of posterior fluid channels inside, each of which penetrates both the front and rear faces of the posterior catheter body 200. This set of posterior fluid channels corresponds one-to-one with a set of anterior fluid channels.

[0051] Both ends of the hose connection structure 300 are provided with a set of insertion parts 310 that match a set of fluid channels 110, 210 of the corresponding end conduit bodies 100, 200. The hose connection structure 300 has an independent set of connecting channels 320 inside. The two corresponding insertion parts 310 at both ends of the hose connection structure 300 are connected one-to-one through the connecting channels 320.

[0052] When each insertion part 310 at the front end of the hose connection structure 300 passes through each corresponding front fluid channel of the front catheter body 100 and is sealed to the inner wall of the front fluid channel, and each insertion part 310 at the rear end of the hose connection structure 300 passes through each corresponding rear fluid channel of the rear catheter body 200 and is sealed to the inner wall of the rear fluid channel, each front fluid channel corresponds to and is connected to each rear fluid channel.

[0053] like Figure 3 and Figure 4 As shown, this set of anterior fluid channels includes an anterior flushing channel 111, an anterior water injection channel 112, and an anterior return channel 113. A fixation balloon 130 is fitted onto the indwelling end 120 of the anterior catheter body 100, and the anterior water injection channel 112 connects to the interior of the fixation balloon 130 through an injection hole 160. An flushing hole 140 and a return hole 150 are provided at the front end of the side wall of the anterior catheter body 100; the flushing hole 140 connects to the anterior flushing channel 111, and the return hole 150 connects to the anterior return channel 113.

[0054] like Figure 3 As shown, a set of post-fluid channels includes a post-flushing channel 211, a post-injection channel 212, and a post-return channel 213. The post-flushing channel 211 is used to connect to an external infusion tube. The post-injection channel 212 is used to connect to an injection balloon. The post-return channel 213 is used for fluid return.

[0055] For ease of description, the anterior fluid channels in the anterior catheter body 100 and the posterior fluid channels in the posterior catheter body 200 will be collectively referred to as the fluid channels of the catheter body. Figure 3 As shown, the inner wall surface of each fluid channel of the catheter body that mates with the insertion part 310 is cylindrical. The outer wall surface of the insertion part 310 is conical, and the outer diameter of the insertion part 310 gradually increases in the corresponding insertion direction of the catheter body. When the insertion part 310 is inserted into the corresponding fluid channel of the catheter body, the outer wall of the insertion part 310 expands the inner wall of the fluid channel, thereby achieving a sealed connection.

[0056] like Figure 3 As shown, the hose connection structure 300 is an integral structure. At least one end of the hose connection structure 300 is connected to the corresponding end of the catheter body in a plug-in manner.

[0057] In the first embodiment, as Figures 5 to 7 As shown, the insertion portions 310 on the corresponding sides of the anterior catheter body 100 and the hose connection structure 300 are formed into a composite structure through a secondary compression molding process. The composite structure refers to the connection of the anterior catheter body 100 and the hose connection structure 300 together. The insertion portions 310 on the other side of the hose connection structure 300 are removably inserted into the corresponding posterior fluid channels in the posterior catheter body 200 and are press-fitted into the posterior fluid channels.

[0058] In the second embodiment, as Figures 8 to 9 As shown, the insertion portions 310 on the corresponding sides of the posterior catheter body 200 and the hose connection structure 300 form a composite structure through a secondary compression molding process. The insertion portions 310 on the other side of the hose connection structure 300 are removably inserted into the corresponding anterior fluid channels in the anterior catheter body 100 and are press-fitted with the anterior fluid channels.

[0059] In the third embodiment, as Figures 10 to 11 As shown, each insertion portion 310 on one side of the tubing connection structure 300 is removably inserted into the corresponding posterior fluid channel in the posterior catheter body 200 and is press-fitted with the posterior fluid channel. Each insertion portion 310 on the other side of the tubing connection structure 300 is removably inserted into the corresponding anterior fluid channel in the anterior catheter body 100 and is press-fitted with the anterior fluid channel.

[0060] Unlike the first to third embodiments, in the fourth embodiment of the present invention, as... Figures 12 to 17 As shown, the hose connection structure 300 consists of a connector 330 and a receiver 340. Figure 15 As shown, the connector 330 and the receiver 340 are separate structures. One set of connectors 310 is located at one end of the connector 330, and the other set of connectors 310 is located at one end of the receiver 340. One of the anterior catheter body 100 and the posterior catheter body 200 forms a composite structure with one end of the connector 330 located at the connector 310 through a secondary molding process. The other end of the anterior catheter body 100 and the posterior catheter body 200 forms a composite structure with one end of the receiver 340 located at the connector 310 through a secondary molding process. The other end of the connector 330 and the other end of the receiver 340 are connected by a socket sealing structure.

[0061] In one particular embodiment, such as Figures 14 to 16 As shown, the rear end of the anterior catheter body 100 is formed into a composite structure with one end of a set of insertion parts 310 connected to the insertion member 330 through a secondary compression molding process, and the front end of the posterior catheter body 200 is formed into a composite structure with one end of a set of insertion parts 310 connected to the receiving member 340 through a secondary compression molding process.

[0062] Compared to the rigid, one-piece flexible tubing connection structure 300 in Embodiment 1, which docks with the flexible catheter body, the docking between the connector 330 and the receiver 340 is easier because both are rigid.

[0063] Specifically, such as Figure 14 and Figure 17As shown, the sealing socket structure includes a set of sockets 331 disposed at the other end of the insert 330 and a set of sockets 341 disposed at the other end of the receiver 340 and adapted to the set of sockets 331. The set of sockets 341 corresponds one-to-one with the set of sockets 331. When each socket 331 is inserted into its corresponding socket 341, the socket 331 and the corresponding socket 341 are interference-fitted. In a specific embodiment, the outer sidewall of the socket 331 and the inner sidewall of the socket 341 are both conical surfaces. The diameter of the outer sidewall of the socket 331 gradually increases in the insertion direction of the corresponding socket 341, and the diameter of the inner sidewall of the socket 341 gradually decreases in the insertion direction of the corresponding socket 331. When each socket 331 is inserted into its corresponding socket 341, the fit between the socket 331 and the corresponding socket 341 is an interference fit.

[0064] In the above embodiments, to reduce the difficulty of docking, the hose connection structure 300 is made of metal or plastic. The plastic hose connection structure 300 can be formed by plastic injection molding.

[0065] In use, with the resectoscope sheath still in place, the anterior catheter body 100 is inserted into the body through the sheath. After the anterior catheter body 100 enters the bladder through the sheath, the sheath is removed. The posterior catheter body 200 is then fixedly connected to the anterior catheter body 100 via the flexible tube connection structure 300, ensuring that a set of anterior fluid channels within the anterior catheter body 100, a set of connecting channels within the flexible tube connection structure 300, and a set of posterior fluid channels within the posterior catheter body 200 correspond and connect one-to-one. Subsequently, liquid or gas is injected into the fixation balloon 130 through the posterior water injection channel 212, causing the balloon to inflate beyond the diameter of the bladder orifice, thus fixing the catheter in a relatively fixed position and preventing it from slipping out of the bladder during flushing. Fluid is then injected through the posterior flushing channel 211. The fluid flows through the catheter into the bladder via the anterior water injection channel 112 for flushing. The flushed fluid returns to the catheter via the anterior return channel 113 and is discharged through the posterior flushing channel 211.

[0066] Compared to existing technologies that rely on guidewires to insert a urinary catheter after removing the outer sheath of the electroresection scope, this split-type urinary catheter eliminates the need for guidewire insertion and removal during insertion into the bladder. This effectively reduces the operational difficulty for medical staff, and with the assistance of the outer sheath, the insertion success rate is high. This helps to reduce medical costs, shorten surgical time, and improve medical efficiency. At the same time, it can also prevent excessive contact between the instrument and the bladder opening, reducing the patient's insertion pain.

[0067] To facilitate the removal of the resectoscope sheath, this split-type catheter can also be equipped with a rigid auxiliary catheter. This rigid auxiliary catheter is removably connected directly or indirectly to the rear end of the anterior catheter body 100. After the anterior catheter body 100 is inserted and the resectoscope sheath is removed, the rigid auxiliary catheter supports the soft catheter. This increases the rigidity of the catheter body 100, thus overcoming surface friction between the inserted catheter body 100 and the resectoscope sheath, facilitating the removal of the resectoscope sheath. The rigid auxiliary catheter varies in different embodiments, primarily depending on the connection structure of the catheter body 100. When connecting to the catheter body 100, it is only necessary to ensure that they can be inserted together and are not easily dislodged; strict requirements for sealing and dimensional fit are not necessary.

[0068] This invention provides a concept and method for a split-type urinary catheter. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A split catheter, characterized by, The application relates to a catheter structure for connecting a front catheter body for entering the body and a rear catheter body for staying outside the body. The front catheter body is internally provided with a group of front fluid channels, and the rear catheter body is internally provided with a group of rear fluid channels corresponding to the front fluid channels. The front catheter body and the rear catheter body are connected by a hose connecting structure. The hose connecting structure is integrally formed, and at least one end of the hose connecting structure is connected to the corresponding catheter body in a plug-in manner. The hose connecting structure is integrally formed, and at least one end of the hose connecting structure is connected to the corresponding catheter body in a plug-in manner. The front catheter body and the rear catheter body are connected by a hose connecting structure. The outer side wall surface of the plug-in part is a conical surface. The front catheter body and the corresponding plug-in part of the hose connecting structure are formed into a composite structure by a secondary film pressing process, and each plug-in part at the other end of the hose connecting structure is removably inserted into the corresponding rear fluid channel of the rear catheter body.

2. The split catheter of claim 1, wherein, ​ 3. The split catheter of claim 1, wherein, ​ Or, the rear catheter body (200) and the plug-in part (310) of the corresponding end of the hose connecting structure (300) are fixedly connected to form an integrated structure by a secondary compression film process, and each plug-in part (310) of the other end of the hose connecting structure (300) is removably inserted into the corresponding front fluid channel in the front catheter body (100); Or, each plug-in part (310) of one end of the hose connecting structure (300) is removably inserted into the corresponding front fluid channel in the front catheter body (100), and each plug-in part (310) of the other end of the hose connecting structure (300) is removably inserted into the corresponding rear fluid channel in the rear catheter body (200).

4. A split catheter, characterized by Comprise: A front catheter body (100) for entering the body, a group of front fluid channels are arranged inside the front catheter body (100), and the rear end of each front fluid channel penetrates the rear end face of the front catheter body (100); A rear catheter body (200) for remaining outside the body, a group of rear fluid channels are arranged inside the rear catheter body (200), and each rear fluid channel penetrates the front end face and the rear end face of the rear catheter body (200); the group of rear fluid channels are arranged in one-to-one correspondence with the group of front fluid channels; And a hose connecting structure (300), a group of plug-in parts (310) are arranged at both ends of the hose connecting structure (300) and matched with a group of fluid channels of the catheter body of the corresponding end; When each plug-in part (310) of one end of the hose connecting structure (300) is inserted into each corresponding front fluid channel of the front catheter body (100) and is in sealed connection with the inner side wall of the front fluid channel, and each plug-in part (310) of the other end of the hose connecting structure (300) is inserted into each corresponding rear fluid channel of the rear catheter body (200) and is in sealed connection with the inner side wall of the rear fluid channel, each front fluid channel is in one-to-one correspondence and communication with each rear fluid channel; The hose connecting structure (300) is composed of a plug-in part (330) and a receiving part (340), and the plug-in part (330) and the receiving part (340) are split structures and are both hard; one group of plug-in parts (310) is arranged at one end of the plug-in part (330), and the other group of plug-in parts (310) is arranged at one end of the receiving part (340); one of the front catheter body (100) and the rear catheter body (200) is in composite structure with one end of the plug-in part (330) arranged with one group of plug-in parts (310) by a secondary compression film process, and the other of the front catheter body (100) and the rear catheter body (200) is in composite structure with one end of the receiving part (340) arranged with one group of plug-in parts (310) by a secondary compression film process; the other end of the plug-in part (330) is connected with the other end of the receiving part (340) through a socket seal structure. In use, the front catheter body (100) is inserted into the bladder through the outer sheath as a channel when the outer sheath is not withdrawn, and then the outer sheath is removed, and the rear catheter body (200) is connected to the front catheter body (100) through the hose connection structure (300).

5. The split catheter of claim 4, wherein, The socket sealing structure comprises a plurality of sockets (331) arranged at the other end of the spigot (330) and a plurality of sockets (341) arranged at the other end of the socket (340), the plurality of sockets (341) are arranged one by one corresponding to the plurality of sockets (331), and each socket (331) and the corresponding socket (341) are arranged in interference fit; the outer side wall of the socket (331) and the inner side wall of the socket (341) are both conical surfaces, the diameter of the outer side wall of the socket (331) gradually increases in the insertion direction of the corresponding socket (341), and the diameter of the inner side wall of the socket (341) gradually decreases in the insertion direction of the corresponding socket (331).

6. The split catheter of any one of claims 1 to 5, wherein, The plurality of front fluid channels comprises a front flushing channel (111), a front water injection channel (112) and a front backflow channel (113); the plurality of rear fluid channels comprises a rear flushing channel (211), a rear water injection channel (212) and a rear backflow channel (213); the retention end (120) of the front catheter body (100) is sleeved with a fixed balloon (130), and the front water injection channel (112) is connected to the fixed balloon (130); the front end of the side wall of the front catheter body (100) is provided with a flushing hole (140) and a backflow hole (150), the flushing hole (140) is connected to the front flushing channel (111), and the backflow hole (150) is connected to the front backflow channel (113); the rear flushing channel (211) is used for connecting an external infusion tube; the rear water injection channel (212) is used for connecting a water injection balloon; and the rear backflow channel (213) is used for backflowing liquid.

7. The split catheter of any one of claims 1 to 5, wherein the split catheter is a split urinary catheter. The material of the hose connection structure (300) is metal or plastic.

8. The split catheter of any one of claims 1 to 5, wherein, The materials of the front catheter body (100) and the rear catheter body (200) are silicone rubber or natural rubber.

Images