A medical catheter

Abstract

The present invention discloses a medical catheter, which comprises a connector assembly and a tube body. The connector assembly includes a first connector, a second connector and a third connector. One end of the tube body is hermetically connected to the third connector and partially extends into the first connector and is hermetically connected to the first connector. A first channel communicating with the first connector is formed on the tube body. A second channel is also formed on the tube body. A first communication structure for communicating the second channel with the second connector is provided between the second channel and the second connector. A first plugging member for plugging the channel opening is provided at one end of the second channel extending into the connector assembly. A sealing structure for hermetically connecting the connector assembly and the tube body and separating the inner cavities of the multiple connectors of the connector assembly from each other is provided between the connector assembly and the tube body. The connector assembly, the tube body and the sealing structure are of a split structure. The connector assembly is an integrally formed integral structure, and the tube body is an integrally formed integral structure. The structure of the present invention is simple, the degree of automation in production is high, the production cost is low, the practicability is strong, and the economic benefit is outstandingly remarkable.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a medical catheter. Background Art

[0002] Medical catheters are common insertable medical devices. They can be divided into urinary catheters, hemostatic catheters, hysterography catheters, etc. according to their uses. Medical catheters can discharge the fluid accumulated in the patient's body to the outside of the body, and can also deliver drugs or insert other slender instruments into the patient's body. The materials of medical catheters mainly include latex, natural rubber, polyvinyl chloride, silicone, etc. The structure of the medical catheter includes a tube body and multiple joints sealed with the tube body. The tube body is provided with multiple independent channels, and each channel corresponds to a joint connected thereto. The main structure of existing medical catheters is generally composed of a tube body and a joint. The following takes a tube body with two independent channels as an example, combined with Figure 37 The production process is described in detail as follows: first, a tube body 2 with two independent channels is manufactured by an extrusion process, and a certain length of the tube body 2 is cut. The mold core includes a first mold core 93 and a second mold core 94, and the mold includes a lower mold 91 and an upper mold 92. The first mold core 93 and the second mold core 94 are respectively inserted into each channel of the tube body 2, and then the first mold core 93 and the second mold core 94 are placed in the lower mold cavity 911 of the lower mold 91, and the upper mold 92 is combined with the lower mold 91. The lower mold cavity 911 and the upper mold cavity 921 form a mold cavity for forming a joint. Rubber or other polymer materials are injected into the mold cavity through the through hole 96 of the upper mold 92 by high temperature and high pressure, and the rubber or other polymer materials fill the gap in the mold cavity. After the joint is formed, the upper mold 92 and the lower mold 91 are separated, and the first mold core 93 and the second mold core 94 are removed from the lower mold 91, and the first mold core 93 and the second mold core 94 are removed from the tube body 2, that is, a joint sealed and connected to the tube body 2 is formed, thereby manufacturing a medical catheter.

[0003] The production process of medical catheters of existing structures has the following defects:

[0004] First, since the diameter of each independent channel of the tube body 2 is small, workers need to spend a lot of time to align the mold core and insert it into each independent channel. When the number of channels is large or the channel diameter is small, workers may need a magnifying glass and a special jig to insert more mold cores into the corresponding independent channels of the tube body 2. This production process greatly increases the production time and is inefficient. In addition, since the tube body 2 is made of elastic material and cannot be positioned, automated production cannot be achieved, resulting in a high cost of finished medical catheters. In actual production measurements, a worker has an effective working time of 10 hours a day and can produce at most 1,500 medical catheters with existing structures, and the qualified rate of finished products is about 90%;

[0005] Second, there is a reverse buckle position between the mold core and the joint. After the joint is formed, it is very difficult to disassemble the joint from the mold core, and it may damage the structure of the medical catheter. Workers need to spend a lot of time and energy to carefully disassemble the joint from the mold core. The production process has a long production time, low production efficiency, and low yield rate.

[0006] Third, due to the many processes in the production process, there are many quality problems caused by human factors, so the number of inspectors and the workload need to be increased, which increases the production cost. Summary of the Invention

[0007] The object of the present invention is to provide a new type of medical catheter in view of the deficiencies of the prior art. The structure of the present invention is simple. During production, the tube body, the joint assembly and the sealing structure can be produced separately first, and then the three are assembled together. The production of the medical catheter of the present invention requires less labor, has a high degree of automation, greatly saves production time, thereby greatly improving production efficiency, effectively reducing production costs, greatly increasing the qualification rate, and having great market competitiveness.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A medical catheter includes a joint assembly and a tube body. The joint assembly has at least three joints. The joint assembly includes a first joint, a second joint and a third joint. One end of the tube body is hermetically connected to the third joint and partially extends into the first joint and is hermetically connected to the first joint. A first channel communicating with the first joint is provided on the tube body. A second channel is also provided on the tube body. A first communication structure for communicating the second channel with the second joint is provided between the second channel and the second joint. A first plugging member for plugging the channel opening is provided at one end of the second channel extending into the joint assembly. A sealing structure for hermetically connecting the joint assembly and the tube body and separating the inner cavities of the multiple joints of the joint assembly from each other is provided between the joint assembly and the tube body. The joint assembly, the tube body and the sealing structure are of a split structure. The joint assembly is an integrally formed integral structure, and the tube body is an integrally formed integral structure.

[0010] As described above for a medical catheter, a limiting structure for restricting the sealing structure from detaching from the joint assembly is provided at the interface end of the third joint.

[0011] As described above for a medical catheter, the first communication structure includes a first opening of the tube body provided on the outer tube wall of the tube body and communicating with the second channel. The sealing structure includes an upper sealing ring for hermetically connecting the tube body and the first joint. The sealing structure also includes a lower sealing ring for hermetically connecting the tube body and the third joint. The upper sealing ring and the lower sealing ring are arranged at intervals to form a communication space communicating the first opening of the tube body and the second joint.

[0012] A medical catheter as described above, wherein the sealing structure includes a plurality of first outer convex ribs disposed between the upper sealing ring and the first joint to seal and connect the two, and the sealing structure further includes a plurality of second outer convex ribs disposed between the lower sealing ring and the third joint to seal and connect the two. The first outer convex ribs and the upper sealing ring are an integrally formed integral structure, and the second outer convex ribs and the lower sealing ring are an integrally formed integral structure.

[0013] A medical catheter as described above, wherein the sealing structure includes a sealing ring, and the first communication structure includes a first opening of the tube body formed on the outer tube wall of the tube body and communicating with the second channel. The first communication structure further includes a first opening of the sealing ring formed on the side wall of the sealing ring and communicating with the first opening of the tube body and the second joint respectively.

[0014] A medical catheter as described above, wherein the sealing structure includes a plurality of first outer convex ribs disposed between the sealing ring and the first joint to seal and connect the two, and the sealing structure further includes a plurality of second outer convex ribs disposed between the sealing ring and the third joint to seal and connect the two. The first opening of the sealing ring is located between the first outer convex ribs and the second outer convex ribs, and the first outer convex ribs or the second outer convex ribs and the sealing ring are an integrally formed integral structure.

[0015] A medical catheter as described above, wherein the first communication structure includes a first inner groove disposed on the inner ring surface of the sealing ring and communicating with the first opening of the sealing ring and the first opening of the tube body respectively.

[0016] A medical catheter as described above, wherein the first communication structure includes a first outer groove disposed on the outer ring surface of the sealing ring and communicating with the second joint and the first opening of the sealing ring respectively.

[0017] A medical catheter as described above, wherein the sealing structure is an adhesive, and the adhesive seals and pastes the outer tube wall of the tube body and the inner wall of the joint assembly together. The first communication structure includes a first opening of the tube body formed on the outer tube wall of the tube body and communicating with the second channel and the second joint respectively.

[0018] A medical catheter as described above, wherein a plurality of first outer convex ribs for sealing and connecting the two are provided between the tube body and the first joint, and a plurality of second outer convex ribs for sealing and connecting the two are provided between the tube body and the third joint. The first opening of the tube body is located between the first outer convex ribs and the second outer convex ribs.

[0019] A medical catheter as described above, wherein the first communication structure includes a first outer groove disposed on the outer tube wall of the tube body and communicating with the second joint and the first opening of the tube body respectively.

[0020] A medical catheter as described above, wherein the limiting structure is a limiting portion formed by the end of the third joint extending and narrowing towards the center of the port.

[0021] A medical catheter as described above, wherein a first one-way valve is provided at the port of the second joint.

[0022] A medical catheter as described above, wherein at one end of the second channel away from the joint assembly, a second plugging member is provided for plugging the channel opening thereof. On the outer wall of the tube body between the first opening of the tube body and the second plugging member, a fifth opening of the tube body communicating with the second channel is provided. A first balloon communicating with the fifth opening of the tube body is hermetically connected to the outer wall of the tube body.

[0023] A medical catheter as described above, wherein on the outer wall of the tube body between the first opening of the tube body and the second plugging member, a sixth opening of the tube body communicating with the second channel is further provided. A second balloon communicating with the sixth opening of the tube body is hermetically connected to the outer wall of the tube body.

[0024] A medical catheter as described above, wherein at one end of the first channel away from the joint assembly, a second plugging member is provided for plugging the channel opening thereof. On the outer wall of the tube body between the joint assembly and the second plugging member, a fifth opening of the tube body connecting the first channel with the external environment is provided. A first balloon communicating with the second channel is hermetically connected to one end of the tube body near the second plugging member.

[0025] A medical catheter as described above, wherein a first balloon communicating with the first channel and the second channel respectively is hermetically connected to the outer wall of the tube body away from the joint assembly. A sealing ring hermetically connected to the tube body is provided on the first channel. An inner ring opening is provided on the sealing ring for a micro camera to pass through and reach the inner cavity of the first balloon. After the micro camera passes through the inner ring opening, the sealing ring tightly sleeves on the wire and the wire can slide reciprocally relative to the sealing ring.

[0026] A medical catheter as described above, wherein the joint assembly further includes a fourth joint. A third channel is further provided on the tube body. At one end of the third channel extending into the joint assembly, a third plugging member is provided for plugging the channel opening thereof. A second opening of the tube body communicating with the third channel is provided on the outer wall of the tube body. A second opening of the sealing ring communicating with the second opening of the tube body and the fourth joint respectively is provided on the side wall of the sealing ring. The second opening of the sealing ring is located between the first outer convex rib and the second outer convex rib.

[0027] A medical catheter as described above, on the inner ring surface of the sealing ring, there are first inner grooves respectively communicating with the first opening of the sealing ring and the first opening of the tube body; on the outer ring surface of the sealing ring, there are first outer grooves respectively communicating with the second joint and the first opening of the sealing ring; on the inner ring surface of the sealing ring, there are second inner grooves respectively communicating with the second opening of the sealing ring and the second opening of the tube body; on the outer ring surface of the sealing ring, there are second outer grooves respectively communicating with the fourth joint and the second opening of the sealing ring; on the inner ring surface of the sealing ring, there are several inner blocking parts for blocking the first inner groove and the second inner groove; on the outer ring surface of the sealing ring, there are also several outer blocking parts for blocking the first outer groove and the second outer groove.

[0028] A medical catheter as described above, at the port of the second joint, there is a first one-way valve; at the end of the second channel far from the joint assembly, there is a second blocking member for blocking its channel opening; on the outer tube wall of the tube body between the first opening of the tube body and the second blocking member, there is a fifth opening of the tube body communicating with the second channel; on the outer tube wall of the tube body, there is a first balloon sealed and connected to the fifth opening of the tube body.

[0029] A medical catheter as described above, on the outer tube wall of the tube body between the first opening of the tube body and the second blocking member, there is a sixth opening of the tube body communicating with the second channel; on the outer tube wall of the tube body, there is also a second balloon sealed and connected to the sixth opening of the tube body; at the port of the fourth joint, there is a second one-way valve; at the end of the third channel far from the joint assembly, there is an eighth blocking member for blocking its channel opening; on the outer tube wall of the tube body between the first balloon and the second balloon, there is a seventh opening of the tube body connecting the third channel with the external environment.

[0030] A medical catheter as described above, at the port of the fourth joint, there is a second one-way valve; at the end of the third channel far from the joint assembly, there is an eighth blocking member for blocking its channel opening; on the outer tube wall of the tube body between the second opening of the tube body and the eighth blocking member, there is a sixth opening of the tube body communicating with the third channel; on the outer tube wall of the tube body, there is a second balloon sealed and connected to the sixth opening of the tube body.

[0031] A medical catheter as described above, the tube body is connected with a ninth blocking member for blocking the first channel.

[0032] A medical catheter as described above, the joint assembly further includes a fifth joint, the tube body is further provided with a fourth channel, one end of the fourth channel extending into the joint assembly is provided with a fourth blocking member for blocking the channel opening thereof, a third opening of the tube body communicating with the fourth channel is provided on the outer tube wall of the tube body, a third inner groove communicating with the third opening of the tube body is provided on the inner ring surface of the sealing ring, a third opening of the sealing ring communicating with the third inner groove is provided on the side wall of the sealing ring, a third outer groove communicating with the third opening of the sealing ring and the fifth joint respectively is provided on the outer ring surface of the sealing ring, several inner blocking portions separate the first inner groove, the second inner groove and the third inner groove from each other, several outer blocking portions separate the first outer groove, the second outer groove and the third outer groove from each other, and the third opening of the sealing ring and the third outer groove are respectively located between the first outer rib and the second outer rib.

[0033] A medical catheter as described above, the joint assembly further includes a sixth joint, the tube body is further provided with a fifth channel, one end of the fifth channel extending into the joint assembly is provided with a fifth blocking member for blocking the channel opening thereof, a fourth opening of the tube body communicating with the fifth channel is provided on the outer tube wall of the tube body, a fourth inner groove communicating with the fourth opening of the tube body is provided on the inner ring surface of the sealing ring, a fourth opening of the sealing ring communicating with the fourth inner groove is provided on the side wall of the sealing ring, a fourth outer groove communicating with the fourth opening of the sealing ring and the sixth joint respectively is provided on the outer ring surface of the sealing ring, several inner blocking portions separate the first inner groove, the second inner groove, the third inner groove and the fourth inner groove from each other, several outer blocking portions separate the first outer groove, the second outer groove, the third outer groove and the fourth outer groove from each other, and the fourth opening of the sealing ring and the fourth outer groove are respectively located between the first outer rib and the second outer rib.

[0034] The beneficial effects of the present invention are:

[0035] 1. When the present invention is produced, the tube body, the joint assembly and the sealing structure can be separately produced individually first, and the tube body, the joint assembly and the sealing structure can be mass-produced, greatly reducing the production cost. It is very easy to seal and connect the tube body and the joint assembly through the sealing structure. After the tube body and the joint assembly are sealed and connected, each joint on the joint assembly can communicate with the corresponding channel on the tube body. After each group of joints and channels are connected, they will not interfere with each other. The tube body and the joint assembly can be assembled using automated equipment during assembly; the structure of the present invention is simple, and the degree of automated production is high. In actual production measurement, a worker's effective working time in a day is 10 hours, and at most 12,000 medical catheters of the present invention can be produced, and the qualification rate is close to 100%. The present invention greatly improves the production efficiency, well reduces the production cost, has strong practicability, and the economic benefits are outstanding.

[0036] 2. After the tube body and the joint assembly are assembled, the limiting structure of the present invention can well prevent the sealing structure from falling off the joint assembly when the tube body is pulled. The sealing structure is firmly fixed between the tube body and the joint assembly. The structure of the present invention is simpler and has stronger use stability.

[0037] 3. The sealing ring of the present invention is hermetically connected to the tube body through an adhesive and then installed in the joint assembly. The sealing ring and the joint assembly are hermetically connected through interference fit. The present invention has lower batch production cost, simpler and more convenient assembly, higher production efficiency, and stronger stability of the assembled medical catheter.

[0038] 4. When the present invention is produced, the production process is simple, the qualified rate of finished products is high, the workload of product inspection can be greatly reduced, and the production cost can be well reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a cross-sectional view of one of the "Y"-shaped joint assembly structures;

[0040] Figure 2 is a cross-sectional view of the "T"-shaped joint assembly structure;

[0041] Figure 3 is a cross-sectional view of another "Y"-shaped joint assembly structure;

[0042] Figure 4 is a cross-sectional view of yet another "Y"-shaped joint assembly structure;

[0043] Figure 5 is a longitudinal cross-sectional view of one of the tube body structures;

[0044] Figure 6 is a transverse cross-sectional view of one of the tube body structures;

[0045] Figure 7 is a schematic plan view of one of the sealing ring structures;

[0046] Figure 8 is Figure 7 a cross-sectional view in the direction of the arrow at A-A in

[0047] Figure 9 is a schematic plan view of another sealing ring structure;

[0048] Figure 10 is Figure 9 a cross-sectional view in the direction of the arrow at B-B in

[0049] Figure 11 is a schematic plan view of yet another sealing ring structure;

[0050] Figure 12 is Figure 11Cross-sectional view in the direction of the arrow at C-C;

[0051] Figure 13 It is a cross-sectional view of the first embodiment of the present invention;

[0052] Figure 14 It is a cross-sectional view of the second embodiment of the present invention;

[0053] Figure 15 It is a cross-sectional view of the third embodiment of the present invention;

[0054] Figure 16 It is a cross-sectional view of the fourth embodiment of the present invention;

[0055] Figure 17 It is a cross-sectional view of the fifth embodiment of the present invention;

[0056] Figure 18 It is a cross-sectional view of the sixth embodiment of the present invention;

[0057] Figure 19 It is a cross-sectional view of the seventh embodiment of the present invention;

[0058] Figure 20 It is one of the cross-sectional views of the eighth embodiment of the present invention;

[0059] Figure 21 It is the cross-sectional view of the usage state of the eighth embodiment of the present invention;

[0060] Figure 22 It is a cross-sectional view of the ninth embodiment of the present invention;

[0061] Figure 23 It is a schematic plan view of the fourth sealing ring structure;

[0062] Figure 24 It is Figure 23 Cross-sectional view in the direction of the arrow at D-D;

[0063] Figure 25 It is a cross-sectional view of the tenth embodiment of the present invention;

[0064] Figure 26 It is a cross-sectional view of the eleventh embodiment of the present invention;

[0065] Figure 27 It is a cross-sectional view of the twelfth embodiment of the present invention;

[0066] Figure 28 It is a cross-sectional view of the thirteenth embodiment of the present invention;

[0067] Figure 29 It is one of the three-dimensional views of the fifth sealing ring structure;

[0068] Figure 30 It is the second three-dimensional view of the fifth sealing ring structure;

[0069] Figure 31 It is a partial perspective view of the second pipe body structure;

[0070] Figure 32 It is a perspective view of the fifth joint assembly structure;

[0071] Figure 33 It is one of the perspective views of the sixth seal ring structure;

[0072] Figure 34 It is the second perspective view of the sixth seal ring structure;

[0073] Figure 35 It is a partial perspective view of the third pipe body structure;

[0074] Figure 36 It is a perspective view of the sixth joint assembly structure;

[0075] Figure 37 It is a schematic diagram of the mold and the die core used in the production of the existing medical catheter structure. Specific Embodiments

[0076] The following further describes the embodiments of the present invention in detail in conjunction with the accompanying drawings:

[0077] As Figures 1 to 36 shown, a medical catheter includes a joint assembly 1 and a pipe body 2. The joint assembly 1 has at least three joints. The joint assembly 1 includes a first joint 11, a second joint 12, and a third joint 13. One end of the pipe body 2 is hermetically connected to the third joint 13 and partially extends into the first joint 11 and is hermetically connected to the first joint 11. A first channel 2a1 communicating with the first joint 11 is provided on the pipe body 2. A second channel 2a2 is also provided on the pipe body 2. A first communication structure 3 for communicating the second channel 2a2 with the second joint 12 is provided between the second channel 2a2 and the second joint 12. A first plugging member 51 for plugging the channel opening is provided at one end of the second channel 2a2 extending into the joint assembly 1. A sealing structure 6 for hermetically connecting the joint assembly 1 and the pipe body 2 and separating the inner cavities of the multiple joints of the joint assembly 1 from each other is provided between the joint assembly 1 and the pipe body 2. The joint assembly 1, the pipe body 2, and the sealing structure 6 are of a split structure. The joint assembly 1 is an integrally formed integral structure, and the pipe body 2 is an integrally formed integral structure.

[0078] Specifically, the joint assembly 1 has at least three joints. The joint assembly 1 is an integrally formed integral structure, and the tube body 2 is an integrally formed integral structure. At least two channels are provided in the tube body 2, and each channel is independent of each other in the tube body 2 and does not communicate with each other. After the tube body 2 is connected to one of the joints in the joint assembly 1, the respective channels of the tube body 2 are respectively in one-to-one correspondence and communication with the remaining joints of the joint assembly 1. When the joint assembly 1 has three joints, the joint assembly 1 has a "T" shape or a "Y" shape structure. The sealing structure 6 can be an integrally formed integral structure, or the sealing structure 6 can be an adhesive.

[0079] The tube body 2, the joint assembly 1 and the sealing structure 6 are separate structures and can be batch-produced separately during production. Batch production can greatly reduce the production cost. During assembly, the sealing structure 6 can easily seal and connect the tube body 2 and the joint assembly 1 together. After the two are sealed and connected, the respective joints on the joint assembly 1 can communicate with the corresponding channels on the tube body 2, and there will be no interference between the connected joints and channels. The tube body 2 and the joint assembly 1 can also be assembled using automated equipment when assembling into a medical catheter. The structure of the present invention is simple, and the degree of automated production is high. In actual production measurement, a worker's effective working time in a day is 10 hours, and at most 12,000 medical catheters of the present invention can be produced, and the qualified rate is close to 100%. The present invention greatly improves the production efficiency, well reduces the production cost, has strong practicability, and the economic benefit is outstanding.

[0080] A limiting structure 18 for restricting the sealing structure 6 from detaching from the joint assembly 1 is provided at the interface end of the third joint 13. After the tube body 2 and the joint assembly 1 are assembled, the use of the limiting structure 18 can well prevent the sealing structure 6 from falling off the joint assembly 1 when the medical catheter is pulled. The sealing structure 6 is firmly fixed between the tube body 2 and the joint assembly 1. The structure of the present invention is simpler, and the assembled medical catheter has strong stability, which can reduce medical risks.

[0081] Such as Figure 17As shown, in this embodiment, the first connection structure 3 includes a first opening 2b1 of the pipe body 2 formed on the outer pipe wall of the pipe body 2 and communicating with the second channel 2a2. The sealing structure 6 includes an upper sealing ring 611 for sealingly connecting the pipe body 2 and the first joint 11. The sealing structure 6 further includes a lower sealing ring 612 for sealingly connecting the pipe body 2 and the third joint 13. The upper sealing ring 611 and the lower sealing ring 612 are spaced apart to form a communication space 6a5 connecting the first opening 2b1 of the pipe body and the second joint 12. The sealing structure 6 includes a plurality of first outward convex ribs 6d1 disposed between the upper sealing ring 611 and the first joint 11 to seal and connect the two. The sealing structure 6 further includes a plurality of second outward convex ribs 6d2 disposed between the lower sealing ring 612 and the third joint 13 to seal and connect the two. The first outward convex rib 6d1 and the upper sealing ring 611 are an integrally formed integral structure. The second outward convex rib 6d2 and the lower sealing ring 612 are an integrally formed integral structure. The upper sealing ring 611 is located at the upper end of the first opening 2b1 of the pipe body. The lower sealing ring 612 is located at the lower end of the first opening 2b1 of the pipe body. The upper sealing ring 611 and the lower sealing ring 612 are spaced apart, and the gap between the two can communicate the first opening 2b1 of the pipe body and the second joint 12. The structure of the present invention is simpler, the assembly is more convenient and reliable, and the sealing and leakage prevention are more reliable.

[0082] In another embodiment, the sealing structure 6 includes a sealing ring 61. The first communication structure 3 includes a first opening 2b1 of the pipe body formed on the outer pipe wall of the pipe body 2 and communicating with the second channel 2a2. The first communication structure 3 further includes a first opening 6a1 of the sealing ring formed on the side wall of the sealing ring 61 and communicating with the first opening 2b1 of the pipe body and the second joint 12 respectively. The upper end of the sealing ring 61 seals and connects the pipe body 2 with the first joint 11, and the lower end of the sealing ring 61 seals and connects the pipe body 2 with the third joint 13. During mass production, the pipe body 2 is mass-produced by an extrusion process, and pipe bodies 2 with different outer diameters and different numbers of channels can be produced. Then, the pipe body 2 with a corresponding length is cut according to the needs of the medical catheter. At the same time, the joint assembly 1 can be mass-produced. The pipe bodies 2 with different numbers of channels are matched with the joint assemblies 1 with corresponding numbers of joints. Since the joint assembly 1 is produced uniformly, the specifications of the third joint 13 will not change. In order to achieve a sealed connection between the pipe bodies 2 of different specifications and the joint assembly 1 of a unified specification, it is necessary to mass-produce the sealing ring 61 separately. The inner diameter of the sealing ring 61 matches the outer diameter of the pipe body 2, and the outer diameter of the sealing ring 61 is larger than the inner diameters of the third joint 13 and the first joint 11. During assembly production, after aligning the first opening 2b1 of the pipe body and the first opening 6a1 of the sealing ring, the inner ring surface of the sealing ring 61 and the outer pipe wall of the pipe body 2 are sealed and connected by an adhesive. Then, after aligning the first opening 6a1 of the sealing ring and the second joint 12, the sealing ring 61 is inserted into the joint assembly 1, and the sealing ring 61 and the joint assembly 1 are in interference fit for sealed connection.

[0083] When the number of channels of the pipe body 2 and the number of joints of the joint assembly 1 are determined, according to production requirements, the outer diameter specifications of the pipe body 2 will be different, but the size of the third joint 13 of the mass-produced joint assembly 1 remains unchanged. At this time, only the sealing ring 61 matching the specification of the pipe body 2 needs to be produced, and there is no need to produce the joint assembly 1 with different specifications of the third joint 13. The cost saved by mass-producing the joint assembly 1 of the same specification is greater than the cost generated by producing the sealing rings 61 with different inner diameter specifications, and the assembly cost of assembling the pipe body 2, the joint assembly 1 and the sealing ring 61 is less than the injection molding cost of injection molding the joint assembly 1 on the pipe body 2. The mass production cost of the present invention is lower, the assembly is simpler and more convenient, the production efficiency of the standardized mode is higher, and the quality stability of the assembled medical catheter is high.

[0084] The sealing structure 6 includes a plurality of first external ribs 6d1 disposed between the sealing ring 61 and the first joint 11 and sealingly connecting the two. The sealing structure 6 also includes a plurality of second external ribs 6d2 disposed between the sealing ring 61 and the third joint 13 and sealingly connecting the two. The first opening 6a1 of the sealing ring is located between the first external rib 6d1 and the second external rib 6d2. The first external rib 6d1 or the second external rib 6d2 and the sealing ring 61 are an integral structure formed in one piece. Figure 11 , Figure 12 , Figure 15 , Figure 20 , Figure 21 As shown, the first outer convex rib 6d1 and the second outer convex rib 6d2 are annular convex ribs, which can also achieve a better sealing effect. The first outer convex rib 6d1 and the second outer convex rib 6d2 are respectively integrally formed with the sealing ring 61. After the sealing ring 61 and the joint assembly 1 are interference fitted together, the first outer convex rib 6d1 and the second outer convex rib 6d2 will press the inner wall of the joint assembly 1, so that the connection between the sealing ring 61 and the joint assembly 1 is tighter and the sealing is better. There is no conduction between the inner cavities of the joints in the joint assembly 1, the structure is simpler, and the quality stability of the assembled medical catheter is higher.

[0085] The first connecting structure 3 includes a first inner groove 6c1 disposed on the inner surface of the sealing ring 61 and connected to the first opening 6a1 of the sealing ring and the first opening 2b1 of the tube body. Figure 10 , Figure 12 , Figure 14 , Figure 15 , Figures 19 to 21 As shown, the first inner groove 6c1 is arranged on the inner ring surface of the sealing ring 61. The first inner groove 6c1 can be a closed annular groove or a circular arc groove surrounding the inner ring surface of the sealing ring 61. The first inner groove 6c1 can also be a circular groove surrounding the first sealing ring opening 6a1. The first sealing ring opening 6a1 is located at the bottom of the first inner groove 6c1. When one end of the tube body 2 is installed in the sealing ring 61, since the first sealing ring opening 6a1 or the first tube body opening 2b1 is relatively small, the two may not be completely aligned due to position deviation, thereby causing the communication effect between the first sealing ring opening 6a1 and the first tube body opening 2b1 to be unsatisfactory. By providing the first inner groove 6c1, even if there is a certain position deviation when one end of the tube body 2 is installed in the sealing ring 61, it will not affect the smooth communication between the first sealing ring opening 6a1 and the first tube body opening 2b1. The structure is simpler, the assembly is simpler and more convenient, the production efficiency is higher, the assembled medical catheter is more stable, and the qualified rate of finished products is higher.

[0086] The first communication structure 3 includes a first outer groove 6b1 provided on the outer ring surface of the sealing ring 61 and communicating with the second joint 12 and the first opening 6a1 of the sealing ring respectively. As Figures 9 to 12 , Figure 14 , Figure 15 , Figures 19 to 21 shown, the first outer groove 6b1 is provided on the outer ring surface of the sealing ring 61. The first outer groove 6b1 can be a closed annular groove surrounding the outer ring surface of the sealing ring 61 or an arc-shaped groove, and the first outer groove 6b1 can also be a circular groove surrounding the first opening 6a1 of the sealing ring. The first opening 6a1 of the sealing ring is located at the bottom of the first outer groove 6b1. When the sealing ring 61 is installed in the joint assembly 1, since the first opening 6a1 of the sealing ring is small, the first opening 6a1 of the sealing ring sometimes fails to be completely aligned with the second joint 12 due to position deviation, resulting in an unsatisfactory communication effect between the first opening 6a1 of the sealing ring and the second joint 12. By providing the first outer groove 6b1, even if there is a certain position deviation after the sealing ring 61 is installed in the joint assembly 1, it will not affect the smooth communication between the first opening 6a1 of the sealing ring and the second joint 12. The structure of the present invention is simpler, the assembly is simpler and more convenient, the production efficiency is higher, the stability of the assembled medical catheter is stronger, and the qualified rate of the finished product is higher.

[0087] As Figure 16 shown, in this embodiment, the sealing structure 6 is an adhesive, and the adhesive seals and pastes the outer tube wall of the tube body 2 and the inner wall of the joint assembly 1 together. The first communication structure 3 includes a first opening 2b1 provided on the outer tube wall of the tube body 2 and communicating with the second channel 2a2 and the second joint 12 respectively. The outer tube wall of the tube body 2 and the inner wall of the third joint 13 are adhesively sealed and connected. The sealing structure 6 is an adhesive filled between the outer tube wall of the tube body 2 and the inner wall of the joint assembly 1. The adhesive makes the connections between the tube body 2 and the second joint 12 and the first joint 11 more sealed and firm, the assembly is simpler and more convenient, and the production efficiency is higher.

[0088] A plurality of first outer ribs 6d1 for sealing connection between the tube body 2 and the first joint 11 are provided between the tube body 2 and the first joint 11, and a plurality of second outer ribs 6d2 for sealing connection between the tube body 2 and the third joint 13 are provided between the tube body 2 and the third joint 13. The first opening 2b1 of the tube body is located between the first outer rib 6d1 and the second outer rib 6d2. As Figure 5 and Figure 16As shown, the first external convex rib 6d1 and the second external convex rib 6d2 are annular convex ribs, and the annular convex ribs can also achieve a better sealing effect. The first external convex rib 6d1 and the second external convex rib 6d2 are respectively pasted on the tube body 2 through an adhesive. The tube body 2 and the joint assembly 1 are also hermetically connected through an adhesive. The first external convex rib 6d1 and the second external convex rib 6d2 will press against the joint assembly 1, making the connection between the tube body 2 and the joint assembly 1 tighter and the sealing performance better. The joints inside the joint assembly 1 will not conduct, the structure is simpler, and the assembled medical catheter has stronger stability.

[0089] The first communication structure 3 includes a first external groove 6b1 provided on the outer tube wall of the tube body 2 and communicating with the second joint 12 and the first opening 2b1 of the tube body respectively. As Figure 16 shown, the first external groove 6b1 is provided on the outer tube wall of the tube body 2. The first external groove 6b1 can be a closed annular groove surrounding the outer tube wall of the tube body 2 or an arc-shaped groove, and the first external groove 6b1 can also be a circular groove surrounding the first opening 2b1 of the tube body. The first tube body opening 2b1 is located at the bottom of the first external groove 6b1. When the tube body 2 and the joint assembly 1 are hermetically connected through an adhesive, since the first opening 2b1 of the tube body is small, the first opening 2b1 of the tube body sometimes has a position deviation and is not completely aligned with the second joint 12, resulting in an unsatisfactory communication effect between the first opening 2b1 of the tube body and the second joint 12. By providing the first external groove 6b1, even if there is a certain position deviation after the tube body 2 is inserted into the joint assembly 1, it will not affect the smooth communication between the first opening 2b1 of the tube body and the second joint 12. The structure of the present invention is simpler, the assembly is simpler and more convenient, the production efficiency is higher, and the assembled medical catheter has stronger stability.

[0090] The limiting structure 18 is a limiting portion where the end of the third joint 13 extends and narrows towards the center of the port. As Figure 4 、 Figures 13 to 15 、 Figures 17 to 22 shown, the end of the third joint 13 extends and narrows towards the center of the port to form a limiting portion. During the assembly production, first, the sealing ring 61 and one end of the tube body 2 are hermetically connected through an adhesive, and then the other end of the tube body 2 enters the joint assembly 1 from the port of the first joint 11 and extends out from the third joint 13. By pulling the other end of the tube body 2 forcefully, the sealing ring 61 is press-fitted with the joint assembly 1 for hermetic connection. The limiting portion can effectively prevent the sealing ring 61 from detaching from the third joint 13 when the tube body 2 is over-pulled. The structure is simpler, the assembly is more convenient, the production efficiency is higher, and the assembled medical catheter has better sealing effect and anti-detachment effect.

[0091] The port of the second joint 12 is provided with a first one-way valve 171. As Figures 13 to 15As shown, the first one-way valve 171 only allows gas or liquid to flow from the outside to the inside of the second joint 12, and can prevent gas or liquid from leaking out of the port of the second joint 12. Since the second joint 12, the first communication structure 3, and the second channel 2a2 are connected in sequence, when a syringe is inserted into the first one-way valve 171, liquid can be injected into the second joint 12, and the liquid will reach the patient's body. Also, the body fluid in the patient's body can be sucked out with a syringe for testing.

[0092] At one end of the second channel 2a2 away from the joint assembly 1, there is a second plugging member 52 for plugging its channel opening. On the outer wall of the tube body 2 between the first opening 2b1 of the tube body and the second plugging member 52, there is a fifth opening 2b5 of the tube body communicating with the second channel 2a2. A first balloon 71 communicating with the fifth opening 2b5 of the tube body is hermetically connected to the outer wall of the tube body 2. As Figure 18 shown, in this embodiment, the first balloon 71 is located at one end of the tube body 2 away from the joint assembly 1. The first balloon 71 has elasticity and is in a contracted state when not inflated. This embodiment can be used as a urinary catheter. The tube body 2 is inserted into the patient's urinary tract, and a syringe is inserted into the first one-way valve 171. Sterile water is injected into the second joint 12. After the first balloon 71 is inflated, it expands and fixes the tube body 2 in the bladder. Then, urine in the patient's body can be led out of the body through the first joint 11 and the first channel 2a1.

[0093] On the outer wall of the tube body 2 between the first opening 2b1 of the tube body and the second plugging member 52, there is also a sixth opening 2b6 of the tube body communicating with the second channel 2a2. A second balloon 72 communicating with the sixth opening 2b6 of the tube body is hermetically connected to the outer wall of the tube body 2. As Figure 22 shown, in this embodiment, the second channel 2a2 is in communication with both the first balloon 71 and the second balloon 72. This embodiment can be used as a catheter for urethral compression hemostasis.

[0094] As Figure 19 shown, this embodiment can be used as a medical catheter for treating prostate diseases. At one end of the first channel 2a1 away from the joint assembly 1, there is a second plugging member 52 for plugging its channel opening. On the outer wall of the tube body 2 between the joint assembly 1 and the second plugging member 52, there is a fifth opening 2b5 of the tube body connecting the first channel 2a1 with the external environment. A first balloon 71 communicating with the second channel 2a2 is hermetically connected to one end of the tube body 2 close to the second plugging member 52.

[0095] As Figure 20 and Figure 21As shown, in this embodiment, a first balloon 71 communicating with the first channel 2a1 and the second channel 2a2 is hermetically connected to the outer pipe wall of the pipe body 2 away from the joint assembly 1. A sealing ring 53 hermetically connected to the pipe body 2 is provided on the first channel 2a1. An inner ring opening 54 is provided on the sealing ring 53 for the micro camera 81 to pass through and reach the inner cavity of the first balloon 71. After the micro camera 81 passes through the inner ring opening 54, the sealing ring 53 tightly sleeves on the wire 82 and the wire 82 can slide reciprocally relative to the sealing ring 53. The sealing ring 53 can be arranged at any position in the first channel 2a1, and the sealing ring 53 is relatively fixed to the pipe body 2. The wire 82 is electrically connected to the micro camera 81. The wire 82 passes through the inner ring opening 54. The diameter of the wire 82 is larger than the diameter of the inner ring opening 54, so that the wire 82 maintains a sealed fit with the sealing ring 53. The wire 82 can also pass through the inner ring opening 54 after sleeving a steel pipe. The diameter of the steel pipe is larger than the diameter of the inner ring opening 54, so that the steel pipe maintains a sealed fit with the sealing ring 53. This embodiment can be used as a uterine imaging catheter. When in use, first insert the wire 82 and the micro camera 81 into the sealing ring 53 and make the micro camera 81 reach inside the first balloon 71. Then insert the pipe body 2 into the uterus. Inflate the first balloon 71 by filling it with a transparent gas or liquid to make the first balloon 71 expand. The inflated first balloon 71 can fix the pipe body 2 in the uterus and also facilitate the micro camera 81 to take pictures.

[0096] As Figures 23 to 25As shown, the joint assembly 1 further includes a fourth joint 14. A third channel 2a3 is further formed on the pipe body 2. One end of the third channel 2a3 extending into the joint assembly 1 is provided with a third plugging member 55 for plugging the channel opening thereof. A second pipe body opening 2b2 communicating with the third channel 2a3 is formed on the outer pipe wall of the pipe body 2. A second seal ring opening 6a2 communicating with the second pipe body opening 2b2 and the fourth joint 14 respectively is formed on the side wall of the seal ring 61. The second seal ring opening 6a2 is located between the first outer convex rib 6d1 and the second outer convex rib 6d2. A first inner groove 6c1 communicating with the first seal ring opening 6a1 and the first pipe body opening 2b1 respectively is formed on the inner ring surface of the seal ring 61. A first outer groove 6b1 communicating with the second joint 12 and the first seal ring opening 6a1 respectively is formed on the outer ring surface of the seal ring 61. A second inner groove 6c2 communicating with the second seal ring opening 6a2 and the second pipe body opening 2b2 respectively is formed on the inner ring surface of the seal ring 61. A second outer groove 6b2 communicating with the fourth joint 14 and the second seal ring opening 6a2 respectively is formed on the outer ring surface of the seal ring 61. A plurality of inner blocking portions 62 for blocking the first inner groove 6c1 and the second inner groove 6c2 are provided on the inner ring surface of the seal ring 61. A plurality of outer blocking portions 63 for blocking the first outer groove 6b1 and the second outer groove 6b2 are further provided on the outer ring surface of the seal ring 61. In this embodiment, the first outer convex rib 6d1, the second outer convex rib 6d2, the inner blocking portion 62, the outer blocking portion 63 and the seal ring 61 are of an integrally formed integral structure. The inner blocking portion 62 is distributed between the first inner groove 6c1 and the second inner groove 6c2, and the outer blocking portion 63 is distributed between the first outer groove 6b1 and the second outer groove 6b2. The joint assembly 1 has four joints, the pipe body 2 has three channels, and the seal ring 61 has two openings. After the joint assembly 1, the pipe body 2 and the seal ring 61 are hermetically assembled together, the first joint 11 communicates with the first channel 2a1 to form a first set of communication pipelines, the second joint 12 communicates with the second channel 2a2 to form a second set of communication pipelines, and the fourth joint 14 communicates with the third channel 2a3 to form a third set of communication pipelines. The communication pipelines of each group are independent of each other and will not interfere with each other.

[0097] A first one-way valve 171 is provided at the port of the second joint 12. A second plugging member 52 for plugging the channel opening thereof is provided at one end of the second channel 2a2 away from the joint assembly 1. A fifth pipe body opening 2b5 communicating with the second channel 2a2 is formed on the outer pipe wall of the pipe body 2 between the first pipe body opening 2b1 and the second plugging member 52. A first balloon 71 communicating with the fifth pipe body opening 2b5 is hermetically connected to the outer pipe wall of the pipe body 2. As Figure 26As shown, in this embodiment, the fourth connector 14 communicates with the third channel 2a3 to form a third set of connecting pipelines, which can be used as the pipeline for injecting drugs into the patient's body. The function of this embodiment is more abundant and the integration degree is higher.

[0098] As Figure 27 shown, this embodiment can be used as a medical balloon catheter for treating prostate diseases. An outer wall of the tube body 2 between the first opening 2b1 of the tube body and the second plugging member 52 is provided with a sixth opening 2b6 of the tube body communicating with the second channel 2a2. A second balloon 72 communicating with the sixth opening 2b6 of the tube body is further hermetically connected to the outer wall of the tube body 2. A second one-way valve 172 is provided at the port of the fourth connector 14. An eighth plugging member 58 for plugging the channel opening is provided at one end of the third channel 2a3 away from the connector assembly 1. An outer wall of the tube body 2 between the first balloon 71 and the second balloon 72 is provided with a seventh opening 2b7 of the tube body communicating the third channel 2a3 with the external environment. The second channel 2a2 communicates with both the first balloon 71 and the second balloon 72. The tube body 2 is inserted into the patient's urethra, a syringe is inserted into the first one-way valve 171, and sterile gas or liquid is injected into the second connector 12. After the first balloon 71 and the second balloon 72 are inflated and enlarged, the tube body 2 is fixed in the urethra. At this time, the prostate is located between the first balloon 71 and the second balloon 72. Another syringe is inserted into the second one-way valve 172, and drugs are injected into the fourth connector 14. The drugs will reach the prostate in a targeted manner, and the treatment is more accurate and efficient.

[0099] As Figure 28 shown, this embodiment can be used as a balloon catheter for dilating the uterus. A second one-way valve 172 is provided at the port of the fourth connector 14. An eighth plugging member 58 for plugging the channel opening is provided at one end of the third channel 2a3 away from the connector assembly 1. An outer wall of the tube body 2 between the second opening 2b2 of the tube body and the eighth plugging member 58 is provided with a sixth opening 2b6 of the tube body communicating with the third channel 2a3. A second balloon 72 communicating with the sixth opening 2b6 of the tube body is hermetically connected to the outer wall of the tube body 2. A ninth plugging member 59 for plugging the first channel 2a1 can also be connected to the tube body 2.

[0100] As Figures 29 to 32As shown, the joint assembly 1 further includes a fifth joint 15. A fourth channel 2a4 is further formed on the pipe body 2. One end of the fourth channel 2a4 extending into the joint assembly 1 is provided with a fourth plugging member 56 for plugging the channel opening thereof. A third pipe body opening 2b3 communicating with the fourth channel 2a4 is formed on the outer pipe wall of the pipe body 2. A third inner groove 6c3 communicating with the third pipe body opening 2b3 is formed on the inner ring surface of the sealing ring 61. A third sealing ring opening 6a3 communicating with the third inner groove 6c3 is formed on the side wall of the sealing ring 61. Third outer grooves 6b3 communicating with the third sealing ring opening 6a3 and the fifth joint 15 respectively are formed on the outer ring surface of the sealing ring 61. A plurality of inner blocking portions 62 separate the first inner groove 6c1, the second inner groove 6c2 and the third inner groove 6c3 from each other. A plurality of outer blocking portions 63 separate the first outer groove 6b1, the second outer groove 6b2 and the third outer groove 6b3 from each other. The third sealing ring opening 6a3 and the third outer groove 6b3 are respectively located between the first outer rib 6d1 and the second outer rib 6d2. The inner blocking portions 62 are respectively located between the first inner groove 6c1 and the second inner groove 6c2, between the second inner groove 6c2 and the third inner groove 6c3, and between the third inner groove 6c3 and the first inner groove 6c1. The outer blocking portions 63 are respectively located between the first outer groove 6b1 and the second outer groove 6b2, between the second outer groove 6b2 and the third outer groove 6b3, and between the third outer groove 6b3 and the first outer groove 6b1. The joint assembly 1 has five joints, the pipe body 2 has four channels, the sealing ring 61 has three openings, the fifth joint 15 communicates with the fourth channel 2a4 to form a fourth set of communication pipelines, and the fourth set of communication pipelines is independent of the other three sets of communication pipelines and will not interfere with each other.

[0101] As Figures 33 to 36As shown, the joint assembly 1 further includes a sixth joint 16. A fifth channel 2a5 is further formed on the pipe body 2. One end of the fifth channel 2a5 extending into the joint assembly 1 is provided with a fifth plugging member 57 for plugging the channel opening thereof. A fourth pipe body opening 2b4 communicating with the fifth channel 2a5 is formed on the outer pipe wall of the pipe body 2. A fourth inner groove 6c4 communicating with the fourth pipe body opening 2b4 is formed on the inner ring surface of the sealing ring 61. A fourth sealing ring opening 6a4 communicating with the fourth inner groove 6c4 is formed on the side wall of the sealing ring 61. A fourth outer groove 6b4 communicating with the fourth sealing ring opening 6a4 and the sixth joint 16 respectively is formed on the outer ring surface of the sealing ring 61. A plurality of inner barrier portions 62 separate the first inner groove 6c1, the second inner groove 6c2, the third inner groove 6c3 and the fourth inner groove 6c4 from each other. A plurality of outer barrier portions 63 separate the first outer groove 6b1, the second outer groove 6b2, the third outer groove 6b3 and the fourth outer groove 6b4 from each other. The fourth sealing ring opening 6a4 and the fourth outer groove 6b4 are respectively located between the first outer rib 6d1 and the second outer rib 6d2. The inner barrier portions 62 are respectively located between the first inner groove 6c1 and the second inner groove 6c2, between the second inner groove 6c2 and the third inner groove 6c3, between the third inner groove 6c3 and the fourth inner groove 6c4, and between the fourth inner groove 6c4 and the first inner groove 6c1. The outer barrier portions 63 are respectively located between the first outer groove 6b1 and the second outer groove 6b2, between the second outer groove 6b2 and the third outer groove 6b3, between the third outer groove 6b3 and the fourth outer groove 6b4, and between the fourth outer groove 6b4 and the first outer groove 6b1. The joint assembly 1 has six joints, the pipe body 2 has five channels, the sealing ring 61 has four openings. The sixth joint 16 communicates with the fifth channel 2a5 to form a fifth set of communication pipelines, and the fifth set of communication pipelines is independent of the other four sets of communication pipelines and will not interfere with each other.

[0102] The joint assembly 1, the pipe body 2 and the sealing ring 61 are respectively made of plastics, rubbers or silicones such as PE, PP, PVC, PU, TPE, ABS, etc. The first plugging member 51, the second plugging member 52, the third plugging member 55, the fourth plugging member 56, the fifth plugging member 57 and the eighth plugging member 58 are respectively made of plastics, rubbers or latex filled at the ports of each channel. The production process of the present invention is simple, the qualified rate of the finished product is high, the workload of product inspection can be greatly reduced, and the production cost can be well reduced.

Claims

1. A medical catheter, characterized in that: It includes a joint assembly (1) and a pipe body (2). The joint assembly (1) has at least three joints. The joint assembly (1) includes a first joint (11), a second joint (12) and a third joint (13). One end of the pipe body (2) is hermetically connected to the third joint (13) and partially extends into the first joint (11) and is hermetically connected to the first joint (11). A first channel (2a1) communicating with the first joint (11) is provided on the pipe body (2). A second channel (2a2) is also provided on the pipe body (2). A first communication structure (3) for communicating the second channel (2a2) with the second joint (12) is provided between the second channel (2a2) and the second joint (12). A first plugging member (51) for plugging the channel opening is provided at one end of the second channel (2a2) extending into the joint assembly (1). A sealing structure (6) for hermetically connecting the joint assembly (1) and the pipe body (2) and separating the inner cavities of the multiple joints of the joint assembly (1) from each other is provided between the joint assembly (1) and the pipe body (2). The joint assembly (1), the pipe body (2) and the sealing structure (6) are of a split structure. The joint assembly (1) is an integrally formed integral structure. The pipe body (2) is an integrally formed integral structure; The first communication structure (3) includes a first opening (2b1) of the pipe body provided on the outer pipe wall of the pipe body (2) and communicating with the second channel (2a2). The sealing structure (6) includes an upper sealing ring (611) for hermetically connecting the pipe body (2) and the first joint (11). The sealing structure (6) further includes a lower sealing ring (612) for hermetically connecting the pipe body (2) and the third joint (13). The upper sealing ring (611) and the lower sealing ring (612) are spaced apart to form a communication space (6a5) communicating the first opening (2b1) of the pipe body and the second joint (12).

2. The medical catheter according to claim 1, characterized in that: A limiting structure (18) for limiting the sealing structure (6) from detaching from the joint assembly (1) is provided at the interface end of the third joint (13).

3. The medical catheter according to claim 1, characterized in that: The sealing structure (6) includes a number of first outward convex ribs (6d1) provided between the upper sealing ring (611) and the first joint (11) and hermetically connecting the two. The sealing structure (6) further includes a number of second outward convex ribs (6d2) provided between the lower sealing ring (612) and the third joint (13) and hermetically connecting the two. The first outward convex rib (6d1) and the upper sealing ring (611) are of an integrally formed integral structure. The second outward convex rib (6d2) and the lower sealing ring (612) are of an integrally formed integral structure.

4. A medical catheter according to claim 1 or 2, characterized in that: The sealing structure (6) includes a sealing ring (61). The first communication structure (3) includes a first opening (2b1) of the pipe body provided on the outer pipe wall of the pipe body (2) and communicating with the second channel (2a2). The first communication structure (3) further includes a first opening (6a1) of the sealing ring provided on the side wall of the sealing ring (61) and communicating with the first opening (2b1) of the pipe body and the second joint (12).

5. The medical catheter according to claim 4, characterized in that: The sealing structure (6) includes a number of first external convex ribs (6d1) provided between the sealing ring (61) and the first joint (11) to seal and connect the two. The sealing structure (6) further includes a number of second external convex ribs (6d2) provided between the sealing ring (61) and the third joint (13) to seal and connect the two. The first opening (6a1) of the sealing ring is located between the first external convex rib (6d1) and the second external convex rib (6d2). The first external convex rib (6d1) or the second external convex rib (6d2) and the sealing ring (61) are an integrally formed integral structure.

6. The medical catheter according to claim 4, wherein: The first communication structure (3) includes a first internal groove (6c1) provided on the inner ring surface of the sealing ring (61) and communicating with the first opening (6a1) of the sealing ring and the first opening (2b1) of the pipe body respectively.

7. The medical catheter according to claim 4, wherein: The first communication structure (3) includes a first external groove (6b1) provided on the outer ring surface of the sealing ring (61) and communicating with the second joint (12) and the first opening (6a1) of the sealing ring respectively.

8. A medical catheter according to claim 1 or 2, characterized in that: The sealing structure (6) is an adhesive, which seals and pastes the outer pipe wall of the pipe body (2) to the inner wall of the joint assembly (1). The first communication structure (3) includes a first opening (2b1) of the pipe body provided on the outer pipe wall of the pipe body (2) and communicating with the second channel (2a2) and the second joint (12) respectively.

9. The medical catheter according to claim 8, characterized in that: A number of first external convex ribs (6d1) are provided between the pipe body (2) and the first joint (11) to seal and connect the two. A number of second external convex ribs (6d2) are provided between the pipe body (2) and the third joint (13) to seal and connect the two. The first opening (2b1) of the pipe body is located between the first external convex rib (6d1) and the second external convex rib (6d2).

10. A medical catheter according to claim 8, wherein: The first communication structure (3) includes a first external groove (6b1) provided on the outer pipe wall of the pipe body (2) and communicating with the second joint (12) and the first opening (2b1) of the pipe body respectively.

11. A medical catheter according to claim 2, wherein: The limiting structure (18) is a limiting part where the end of the third joint (13) extends and narrows towards the port center.

12. A medical catheter according to claim 1 or 2, characterized in that: A first one-way valve (171) is provided at the port of the second joint (12).

13. A medical catheter according to claim 12, characterized in that: At one end of the second channel (2a2) far from the joint assembly (1), a second plugging member (52) is provided for plugging its channel opening. On the outer pipe wall of the pipe body (2) between the first opening (2b1) of the pipe body and the second plugging member (52), a fifth opening (2b5) of the pipe body communicating with the second channel (2a2) is provided. A first balloon (71) communicating with the fifth opening (2b5) of the pipe body is hermetically connected to the outer pipe wall of the pipe body (2).

14. A medical catheter according to claim 13, wherein: On the outer pipe wall of the pipe body (2) between the first opening (2b1) of the pipe body and the second plugging member (52), a sixth opening (2b6) of the pipe body communicating with the second channel (2a2) is further provided. A second balloon (72) communicating with the sixth opening (2b6) of the pipe body is hermetically connected to the outer pipe wall of the pipe body (2).

15. A medical catheter according to claim 12, characterized in that: One end of the first channel (2a1) away from the joint assembly (1) is provided with a second sealing member (52) for blocking its channel opening. An outer tube wall of the tube body (2) between the joint assembly (1) and the second sealing member (52) is provided with a fifth tube body opening (2b5) connecting the first channel (2a1) with the external environment. One end of the tube body (2) close to the second sealing member (52) is sealingly connected to a first balloon (71) communicating with the second channel (2a2).

16. A medical catheter according to claim 12, characterized in that: A first balloon (71) communicating with the first channel (2a1) and the second channel (2a2) respectively is sealingly connected to an outer tube wall of the tube body (2) away from the joint assembly (1). A sealing ring (53) sealingly connected to the tube body (2) is provided on the first channel (2a1). An inner ring opening (54) for a micro camera (81) to pass through to reach the inner cavity of the first balloon (71) is provided on the sealing ring (53). After the micro camera (81) passes through the inner ring opening (54), the sealing ring (53) tightly sleeves on the wire (82) and the wire (82) can slide reciprocally relative to the sealing ring (53).

17. A medical catheter according to claim 5, characterized in that: The joint assembly (1) further includes a fourth joint (14). A third channel (2a3) is further provided on the tube body (2). One end of the third channel (2a3) extending into the joint assembly (1) is provided with a third sealing member (55) for blocking its channel opening. A second tube body opening (2b2) communicating with the third channel (2a3) is provided on an outer tube wall of the tube body (2). A second sealing ring opening (6a2) communicating with the second tube body opening (2b2) and the fourth joint (14) respectively is provided on a side wall of the sealing ring (61). The second sealing ring opening (6a2) is located between the first outer convex rib (6d1) and the second outer convex rib (6d2).

18. A medical catheter according to claim 17, characterized in that: A first inner groove (6c1) communicating with the first sealing ring opening (6a1) and the first tube body opening (2b1) respectively is provided on an inner ring surface of the sealing ring (61). A first outer groove (6b1) communicating with the second joint (12) and the first sealing ring opening (6a1) respectively is provided on an outer ring surface of the sealing ring (61). A second inner groove (6c2) communicating with the second sealing ring opening (6a2) and the second tube body opening (2b2) respectively is provided on the inner ring surface of the sealing ring (61). A second outer groove (6b2) communicating with the fourth joint (14) and the second sealing ring opening (6a2) respectively is provided on the outer ring surface of the sealing ring (61). A plurality of inner blocking portions (62) for blocking the first inner groove (6c1) and the second inner groove (6c2) are provided on the inner ring surface of the sealing ring (61). A plurality of outer blocking portions (63) for blocking the first outer groove (6b1) and the second outer groove (6b2) are further provided on the outer ring surface of the sealing ring (61).

19. A medical catheter according to claim 17, characterized in that: The port of the second joint (12) is provided with a first one-way valve (171). One end of the second channel (2a2) far away from the joint assembly (1) is provided with a second plugging member (52) for plugging its channel opening. An outer tube wall of the tube body (2) between the first opening (2b1) of the tube body and the second plugging member (52) is provided with a fifth opening (2b5) of the tube body communicating with the second channel (2a2). A first balloon (71) communicating with the fifth opening (2b5) of the tube body is hermetically connected to the outer tube wall of the tube body (2).

20. A medical catheter according to claim 19, characterized in that: An outer tube wall of the tube body (2) between the first opening (2b1) of the tube body and the second plugging member (52) is provided with a sixth opening (2b6) of the tube body communicating with the second channel (2a2). A second balloon (72) communicating with the sixth opening (2b6) of the tube body is further hermetically connected to the outer tube wall of the tube body (2). The port of the fourth joint (14) is provided with a second one-way valve (172). One end of the third channel (2a3) far away from the joint assembly (1) is provided with an eighth plugging member (58) for plugging its channel opening. An outer tube wall of the tube body (2) between the first balloon (71) and the second balloon (72) is provided with a seventh opening (2b7) of the tube body connecting the third channel (2a3) with the external environment.

21. A medical catheter according to claim 19, wherein: The port of the fourth joint (14) is provided with a second one-way valve (172). One end of the third channel (2a3) far away from the joint assembly (1) is provided with an eighth plugging member (58) for plugging its channel opening. An outer tube wall of the tube body (2) between the second opening (2b2) of the tube body and the eighth plugging member (58) is provided with a sixth opening (2b6) of the tube body communicating with the third channel (2a3). A second balloon (72) communicating with the sixth opening (2b6) of the tube body is hermetically connected to the outer tube wall of the tube body (2).

22. A medical catheter according to claim 21, characterized in that: The tube body (2) is connected with a ninth plugging member (59) for plugging the first channel (2a1).

23. A medical catheter according to claim 18, wherein: The joint assembly (1) further includes a fifth joint (15). A fourth channel (2a4) is further formed on the pipe body (2). One end of the fourth channel (2a4) extending into the joint assembly (1) is provided with a fourth blocking member (56) for blocking its channel opening. A third pipe body opening (2b3) communicating with the fourth channel (2a4) is formed on the outer pipe wall of the pipe body (2). A third inner groove (6c3) communicating with the third pipe body opening (2b3) is formed on the inner ring surface of the sealing ring (61). A third sealing ring opening (6a3) communicating with the third inner groove (6c3) is formed on the side wall of the sealing ring (61). A third outer groove (6b3) communicating with both the third sealing ring opening (6a3) and the fifth joint (15) is formed on the outer ring surface of the sealing ring (61). A plurality of the inner blocking portions (62) separate the first inner groove (6c1), the second inner groove (6c2), and the third inner groove (6c3) from each other. A plurality of the outer blocking portions (63) separate the first outer groove (6b1), the second outer groove (6b2), and the third outer groove (6b3) from each other. The third sealing ring opening (6a3) and the third outer groove (6b3) are respectively located between the first outer rib (6d1) and the second outer rib (6d2).

24. A medical catheter according to claim 23, wherein: The joint assembly (1) further includes a sixth joint (16). A fifth channel (2a5) is further formed on the pipe body (2). One end of the fifth channel (2a5) extending into the joint assembly (1) is provided with a fifth blocking member (57) for blocking its channel opening. A fourth pipe body opening (2b4) communicating with the fifth channel (2a5) is formed on the outer pipe wall of the pipe body (2). A fourth inner groove (6c4) communicating with the fourth pipe body opening (2b4) is formed on the inner ring surface of the sealing ring (61). A fourth sealing ring opening (6a4) communicating with the fourth inner groove (6c4) is formed on the side wall of the sealing ring (61). A fourth outer groove (6b4) communicating with both the fourth sealing ring opening (6a4) and the sixth joint (16) is formed on the outer ring surface of the sealing ring (61). A plurality of the inner blocking portions (62) separate the first inner groove (6c1), the second inner groove (6c2), the third inner groove (6c3), and the fourth inner groove (6c4) from each other. A plurality of the outer blocking portions (63) separate the first outer groove (6b1), the second outer groove (6b2), the third outer groove (6b3), and the fourth outer groove (6b4) from each other. The fourth sealing ring opening (6a4) and the fourth outer groove (6b4) are respectively located between the first outer rib (6d1) and the second outer rib (6d2).

Images