A telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device

Abstract

The present invention relates to the field of medical devices, and in particular to a telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device; the present invention comprises a first catheter, a second catheter, a third catheter and a guide wire sleeve; the first catheter is provided with a limit stopper, a first balloon and a first balloon one-way inflation joint; the second catheter is provided with a second balloon, a contrast infusion hole, a contrast infusion joint, a second balloon one-way inflation joint and a filling balloon one-way inflation joint; the third catheter is provided with a connected third balloon and a third balloon one-way inflation joint; in the present invention, the first balloon on the first catheter is propped up in the rectum and pushed forward, and then propped up by the second balloon, the filling balloon and the third balloon, and contrast agent is injected by the contrast infusion joint and flows out from the contrast infusion hole; the design of the three-layer catheter can make each step of the operation clearer, simpler, more stable, simpler and more effective.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device. Background Art

[0002] In major hospitals, when performing colonography on patients, it is usually necessary to inject contrast agents such as barium sulfate into the patient's colon through the patient's anus through an enema device, so that the shape of the colon can be more clearly presented when the patient undergoes a subsequent colon X-ray examination, so that the doctor can more clearly observe the diseased part of the patient's colon; and in this process, it is usually necessary to use an inflation device to inject gas into the patient's colon to expand the patient's colon, so that the patient's colon wall mucosa and other tissues can be better filled with the barium sulfate injected in the early stage, so that the injected barium sulfate and other contrast agents can be evenly distributed, so as to facilitate subsequent examination and development.

[0003] The traditional method is to inject contrast agents such as barium sulfate into the patient's colon from the patient's anus through an enema, then disconnect the output tube on the corresponding enema and the anal canal inserted into the anus, and then connect the outlet tube of the corresponding inflation device to the anal canal at the anus end to inflate the patient's colon. Although this method is widely used, it still has certain defects and shortcomings:

[0004] 1. When the output tube of the corresponding enema device is disconnected, there is a possibility that contrast agents such as barium sulfate or even feces will overflow from the anal canal inserted into the patient's anus and cause the corresponding anal canal to fall off, which will result in poor barium sulfate infusion effect, barium sulfate loss, and contamination of the patient's clothing and diagnostic bed.

[0005] 2. At each stage of contrast agent infusion, the patient needs to adopt different lying positions and the medical staff needs to use different techniques to promote the contrast agent to pass quickly through different parts of the colon. For example, when the anal tube is inserted into the anus to a depth of 10 cm, the left side position with the knees bent is adopted; when the contrast agent is infused, the patient is in the supine position, and when the contrast agent passes through the sigmoid colon into the descending colon and reaches the splenic flexure, the patient's left side is raised; when the contrast agent reaches the ascending colon, it is interrupted and the infusion is stopped, and the cecum is filled with body positions and techniques. The patient needs to adopt different postures during the whole process, which is a considerable burden for the patient in the enema stage, greatly increasing the patient's pain and easily causing local soreness and numbness in the patient. At the same time, the doctor needs to use different techniques to massage the patient's abdomen to promote the rapid flow of the contrast agent, which is easy to cause exhaustion of the medical staff.

[0006] 3. In traditional angiography, contrast agent is infused into the colon through a catheter. The contrast agent is moved to the entire colon section by colon peristalsis alone. This not only takes a lot of time, but also cannot guarantee that the inner wall of all areas inside the colon can be soaked with contrast agent, let alone uniform distribution of contrast agent. Actual cases have shown that in traditional angiography, the closer to the contrast agent infusion area, the more contrast agent is distributed, and the farther away, the sparser the distribution. Clear imaging cannot be guaranteed, which can easily lead to misdiagnosis of the patient's condition. Summary of the invention

[0007] In order to solve the above problems, the purpose of the present invention is to provide a telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device, which is propped up in the rectum by the first balloon on the first catheter, pushed forward, and then propped up by the second balloon, the filling balloon and the third balloon, and the contrast agent is injected through the contrast infusion connector and flows out from the contrast infusion hole.

[0008] The objective of the present invention is achieved through the following technical solutions:

[0009] The present invention provides a telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device, which includes a first catheter, a second catheter sleeved in the first catheter, a third catheter sleeved in the second catheter, and a guide wire sleeve sleeved in the third catheter. The first catheter is provided with a limit stop plate, a first balloon and a first balloon one-way inflation joint. The first balloon is located in front of the limit stop plate, the first balloon one-way inflation joint is connected to the first balloon and the first balloon one-way inflation joint is located at the rear of the limit stop plate; the second catheter is provided with a second balloon, a contrast infusion hole, a contrast infusion joint, a second balloon one-way inflation joint and a filling A one-way inflation joint for filling the balloon, the front end of the second catheter is connected to one side of the filling balloon, the other side of the filling balloon is arranged on the third catheter, the second balloon one-way inflation joint is connected to the second balloon, the contrast infusion joint is connected to the contrast infusion hole, and the filling balloon one-way inflation joint is connected to the filling balloon; the third catheter is provided with a third balloon and a third balloon one-way inflation joint that are connected, the third balloon is at the front end of the filling balloon, the third balloon one-way inflation joint is at the rear side of the second balloon one-way inflation joint, a guide wire is arranged in the guide wire sleeve, and a marking ring is arranged at the front end of the third catheter.

[0010] As an improvement of the present invention, a spiral drainage groove is provided at the front end of the first catheter. After the number of spiral turns exceeds one circle, the spiral drainage groove smoothly extends into the wall of the first catheter to form a drainage channel. The drainage channel is communicated with the drainage hole provided in the first catheter, the drainage hole is connected with the drainage tube, and the drainage tube is communicated with the negative pressure drainage bag.

[0011] As a further improvement of the present invention, a push-pull retaining ring is provided at the rear end of the first conduit.

[0012] As a further improvement of the present invention, the rear end of the second conduit is provided with an internal threaded end head, and a plurality of multi-thread internal threaded grooves are evenly distributed on the circumference of the inner wall of the internal threaded end head.

[0013] As a further improvement of the present invention, a push-pull ring is provided on the second conduit, and the push-pull ring is located at the front side of the internal threaded end.

[0014] As a further improvement of the present invention, an eccentric clamping multi-helix terminal is arranged on the third conduit, and the eccentric clamping multi-helix terminal comprises two eccentric fixing rings and a connecting pipe, and the two ends of the connecting pipe are respectively connected to the two eccentric fixing rings, and a plurality of eccentric clamping wheel grooves are arranged in the eccentric fixing ring, and an eccentric clamping wheel is arranged in the eccentric clamping wheel groove.

[0015] As a further improvement of the present invention, the eccentric clamping wheel at the front side is connected to a multi-threaded tube, and the multi-threaded tube is threadably connected to the multi-threaded internal thread groove.

[0016] As a further improvement of the present invention, the rear end of the third catheter is connected to a triangular catheter joint, and the guide wire sleeve passes through the triangular catheter joint.

[0017] As a further improvement of the present invention, a pressure-maintaining valve is provided in the triangular catheter joint.

[0018] As a further improvement of the present invention, a push-pull terminal is provided at the rear end of the guide wire sleeve.

[0019] In the present invention, the first balloon on the first catheter is propped up in the rectum and pushed forward, and then propped up by the second balloon, the filling balloon and the third balloon, and contrast agent is injected through the contrast infusion connector and flows out from the contrast infusion hole; the three-layer catheter design can make each step of the operation clearer, simpler, more stable, simpler and more effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 is a schematic diagram of the connection of the first conduit of the present invention;

[0023] Figure 3It is a schematic diagram of the arrangement of the spiral drainage trough of the present invention;

[0024] Figure 4 is a schematic diagram of the connection of the second conduit of the present invention;

[0025] Figure 5 is a cross-sectional view of the internal thread end of the present invention;

[0026] Figure 6 It is a schematic diagram of the arrangement of the internal thread end of the present invention;

[0027] Figure 7 is a schematic diagram of the connection of the third conduit of the present invention;

[0028] Figure 8 It is a schematic diagram of the connection between the eccentric clamping multi-helical terminal and the internal thread terminal of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the eccentric clamping multi-helical terminal of the present invention;

[0030] Fig.10 A cross-sectional view of the eccentrically clamped multi-helical end of the present invention Figure 1 ;

[0031] Fig.11 A cross-sectional view of the eccentrically clamped multi-helical end of the present invention Figure 2 ;

[0032] Fig.12 A cross-sectional view of the connection between the eccentric clamping multi-helical terminal and the internal thread terminal of the present invention;

[0033] Fig.13 It is a structural schematic diagram of the guide wire sleeve of the present invention;

[0034] Fig.14 A schematic diagram of entering the rectum from the anus in step 1 of the operation steps of the present invention;

[0035] Fig.15 This is a schematic diagram of the first balloon being inflated and fixed on the wall of the rectum region in step 2 of the operation steps of the present invention;

[0036] Fig.16 Schematic diagram of the second catheter 2 being advanced forward from the rectum segment in step 3 of the operation steps of the present invention Figure 1 ;

[0037] Fig.17 Schematic diagram of the second catheter 2 being advanced forward from the rectum segment in step 3 of the operation steps of the present invention Figure 2 ;

[0038] Fig.18It is a schematic diagram of the second balloon being inflated, tightened and fixed after the second catheter is advanced for a certain distance in step 4 of the operation steps of the present invention;

[0039] Fig.19 It is a schematic diagram of the filling balloon and the third balloon being inflated, tightened and fixed in step 5 of the operation steps of the present invention;

[0040] Fig. 20 It is a schematic diagram of the second balloon and the filling balloon being pushed forward after being exhausted in step 6 of the operation steps of the present invention;

[0041] Fig.21 It is a schematic diagram of the second balloon being inflated, tightened and fixed and the third balloon being vented in step 7 of the operation steps of the present invention;

[0042] Fig. 22 It is a schematic diagram of the third catheter being advanced forward and the third balloon and the filling balloon being inflated, tightened and fixed in step 8 of the operation steps of the present invention;

[0043] The figures are marked as follows: 1-first catheter, 11-limiting baffle, 12-first balloon, 13-first balloon one-way inflation connector, 14-spiral drainage groove, 15-push-pull baffle ring, 16-drainage channel, 17-drainage hole, 18-drainage tube, 19-negative pressure drainage bag, 2-second catheter, 21-second balloon, 22-contrast infusion hole, 23-contrast infusion connector, 24-second balloon one-way inflation connector, 25-filling balloon one-way inflation connector, 26-filling balloon, 27-internal thread end, 28 -Multi-thread internal thread groove, 29-push-pull ring, 3-third catheter, 31-third balloon, 32-third balloon one-way inflation connector, 33-marking ring, 34-eccentric clamping multi-spiral terminal, 341-eccentric fixing ring, 342-connecting tube, 343-eccentric clamping wheel groove, 344-eccentric clamping wheel, 345-multi-thread threaded tube, 346-sleeve, 35-triangular catheter connector, 36-pressure-maintaining valve, 37-wire drawing push-pull terminal, 38-wire drawing, 4-guide wire sleeve, 41-guide wire, 42-push-pull terminal. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] like Figures 1 to 22As shown, a telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device of the present invention comprises a first catheter 1, a second catheter 2 sleeved in the first catheter 1, a third catheter 3 sleeved in the second catheter 2, and a guide wire sleeve 4 sleeved in the third catheter 3; the present invention is mainly used to insert the front end catheter part of the present invention from the patient's anus to detect and diagnose tumors inside the patient's intestines by intestinal contrast.

[0046] like Figure 2 As shown, the first catheter 1 is provided with a limit stop plate 11, a first balloon 12 and a first balloon one-way inflation joint 13, the first balloon 12 is located in front of the limit stop plate 11, the first balloon one-way inflation joint 13 is connected to the first balloon 12 and the first balloon one-way inflation joint 13 is located on the rear side of the limit stop plate 11; the front end of the first catheter 1 is provided with a spiral drainage groove 16, the spiral drainage groove 16 smoothly extends to the wall of the first catheter 1 after the number of spiral turns exceeds one circle to form a drainage channel 16, the drainage channel 16 is communicated with a drainage hole 17 arranged in the first catheter 1, the drainage hole 17 is communicated with a drainage tube 18, and the drainage tube 18 is communicated with a negative pressure drainage bag 19; the rear end of the first catheter 1 is provided with a push-pull stop ring 15.

[0047] Specifically, a push-pull retaining ring 15 is fixed to the rear end of the first catheter 1. The front and rear end surfaces of the push-pull retaining ring 15 are both provided with circumferentially raised retaining discs, which are convenient for medical staff to hold and control the push and pull with their fingers. The push-pull retaining ring 15 is coaxially fixed with a limited retaining disc 11 on the outer periphery of the tube wall at a certain distance forward along the axial direction. The circumferential disc surface of the limited retaining disc 11 is relatively large, and the front end surface of the limited retaining disc 11 has a certain backward taper. The limited retaining disc 11 is used to limit the device after it is inserted into the anus. The limited retaining disc 11 plays a limiting role outside the patient's anus to prevent To prevent the first catheter 1 from entering too much, a first balloon 12 is arranged on the first catheter 1 at the front position of the limit baffle 11. The first balloon 12 is a compliant balloon, which is used to expand the anus and the intestinal wall inside the anus, so as to relatively fix the first catheter 1 and provide a channel with sufficient space for the entry of subsequent catheters, while preventing the contrast solution and foul fluid from flowing out of the anus; a first balloon one-way inflation joint 13 is connected to the wall of the first catheter 1 area between the push-pull baffle ring 15 and the limit baffle 15, and the first balloon one-way inflation joint 13 is connected to the wall of the first catheter 1 area between the push-pull baffle ring 15 and the limit baffle 15. A balloon one-way inflation joint 13 connected to an external syringe can be used to inflate the first balloon 12. The front end area of ​​the first catheter 1 is set to be conical. A spiral drainage groove 14 is set on the conical surface of the front end of the first catheter 1. After the number of spiral turns of the spiral drainage groove 14 exceeds one circle, the drainage groove smoothly extends to the wall of the first catheter 1 to form a drainage channel 16. The drainage channel 16 extends axially to the area between the push-pull retaining ring 15 and the limit retaining plate 11 of the first catheter 1. The wall is provided with a drainage hole 17, and the drainage hole 17 is provided. The flow hole 17 is connected to the outside of a drainage tube 18, and the other end of the drainage tube 18 is connected to a negative pressure drainage bag 19. The negative pressure drainage bag 19 can absorb the contrast agent and foul liquid inside the intestine into the negative pressure drainage bag 19 through the drainage tube 18 and the drainage channel 16 according to the negative pressure effect. The spiral drainage groove 14 at the front end of the first catheter 1 can ensure that the liquid of the 360-degree periphery of the first catheter 1 is drained into the spiral drainage groove 14, and the situation where there is a dead corner inside the intestine of the designated area and the residual contrast agent is not drained and inhaled will not occur.

[0048] In the present invention, the second catheter 2 is provided with a second balloon 21, a contrast infusion hole 22, a contrast infusion joint 23, a second balloon one-way inflation joint 24 and a filling balloon one-way inflation joint 25, the front end of the second catheter 2 is connected to one side of the filling balloon 26, the other side of the filling balloon 26 is arranged on the third catheter 3, the second balloon one-way inflation joint 24 is connected to the second balloon 21, the contrast infusion joint 23 is connected to the contrast infusion hole 22, and the filling balloon one-way inflation joint 25 is connected to the filling balloon 26; the rear end of the second catheter 2 is provided with an internal threaded end 27, and the inner wall circumference of the internal threaded end 27 is evenly distributed with a plurality of multi-line internal thread grooves 28; the second catheter 2 is provided with a push-pull ring 29, and the push-pull ring 29 is located on the front side of the internal threaded end 27.

[0049] Specifically, if Figure 2As shown, the first catheter 1 is internally sleeved with a second catheter 2, and the second catheter 2 can be transported and pulled back axially relative to the first catheter 1. The second catheter 2 is much longer than the first catheter 1, so that the second catheter 2 has a sufficiently long length to be transported to the most distal position of the patient's colon. The area of ​​the transport section of the second catheter 2 has a flexible deformation characteristic and can be flexibly bent at will. The second catheter 2 is internally sleeved with a third catheter 3, and the transport length of the third catheter 3 is longer than that of the second catheter 2. Filling balls are arranged on the tube wall in the area at the front end of the second catheter 2 and the front section of the tube wall of the third catheter 3. The filling balloon 26 is a sausage-shaped balloon whose axial length is greater than its diameter and whose length is longer after being filled and expanded. The rear end of the axial front and rear ends of the filling balloon 26 is fixedly sleeved on the tube wall of the second catheter 2, and the front end is sleeved on the tube wall of the third catheter 3, so that the relative displacement difference between the second catheter 2 and the third catheter 3 during the transportation process does not exceed the axial length of the filling balloon; the filling balloon 26 adopts a non-compliant balloon, and the outer diameter of the filling balloon 26 after being filled is smaller than the inner diameter of the inner wall of the patient's intestine, so that there is a certain distance between the filling balloon 26 and the inner wall of the intestine after being filled. When the filling balloon 26 is not inflated, the difference in the travel distance between the second catheter 2 and the third catheter 3 can be adjusted, and the filling balloon 26 can be contracted to the gap between the second catheter 2 and the third catheter 3; the catheter 2 behind the filling balloon 26 is covered with a second balloon 21, which is a compliant balloon. After being filled, the second balloon 21 can be inflated and fixed inside the intestine, which also has the function of relatively fixing the second catheter 2 and preventing leakage inside the intestine. A contrast infusion hole 22 is opened on the wall of the second catheter 2 between the second balloon 21 and the filling balloon 26. The contrast infusion hole 22 is used to infuse contrast agent into the intestine, so that the inside of the intestine can be visualized on the developer.

[0050] like Figure 3As shown, an internal threaded end 27 is coaxially fixed at the rear end of the second catheter 2, and multiple internal thread grooves 28 are evenly distributed on the circumference of the inner wall of the internal threaded end 27. A pressure-maintaining valve 36 evenly divided into a plurality of petals is fixedly arranged on the inner wall of the internal threaded end 27 in front of the multiple internal thread grooves 28 on the inner wall of the internal threaded end 27 (preferably 4 petals are used, and the pressure-maintaining valve 36 blocks the airflow on both sides of the valve to prevent the flow. After the sleeve is inserted, the pressure-maintaining valve 36 can maintain pressure on both sides of the valve to prevent contrast agent and dirty liquid from flowing out through the catheter). The pressure-maintaining valve 36 also has a damping effect on the sliding second catheter 2, so that the second catheter 2 can stop sliding immediately after the push stops, and has a certain self-locking effect; two circular steps are arranged on the outer wall of the internal threaded end 27 at a certain interval to facilitate the function of clamping and fixing with fingers. A second balloon one-way inflation connector 24, a filling balloon one-way inflation connector 25, and a contrast one-way infusion connector 23 are respectively connected to the wall of the second catheter 2 at a certain distance in front of the internal threaded end 27. The second balloon one-way inflation connector 24 and the filling balloon one-way inflation connector 25 are respectively used to inflate the second balloon 21 and the filling balloon 26, and the contrast one-way infusion connector 23 is used to inject contrast agent through a syringe.

[0051] In the present invention, the third catheter 3 is provided with a third balloon 31 and a third balloon one-way inflation joint 32 that are connected to each other. The third balloon 31 is at the front end of the filling balloon 26, and the third balloon one-way inflation joint 32 is at the rear side of the second balloon one-way inflation joint 24. The third catheter 3 is provided with an eccentric clamping multi-helix terminal 34. The eccentric clamping multi-helix terminal 34 includes two eccentric fixing rings 341 and a connecting tube 342. The two ends of the connecting tube 342 are respectively communicated with the two eccentric fixing rings 341. A plurality of eccentric clamping wheel grooves 343 are provided in the eccentric fixing ring 341. An eccentric clamping wheel 344 is provided in the eccentric clamping wheel groove 343. The eccentric clamping wheel 344 at the front side is connected to a multi-thread threaded tube 345, and the multi-thread threaded tube 345 can be threadedly connected to the multi-thread internal thread groove 28.

[0052] Specifically, if Figure 4As shown, the front end of the third catheter 3 is designed to be a conical structure, and a marking ring 33 is provided at the front end of the cone. The function of the marking ring 33 is to facilitate the attending physician to determine the position of the third catheter 3 in the intestine during surgery; the area of ​​the third catheter 3 in the same delivery section has flexible deformation characteristics and can be flexibly bent at will, and the front end of the second catheter 2 is slightly curved, and the tube wall at the front end is slightly flexible, so that the front end of the third catheter 3 will slightly change the degree of the arc bending under the action of the external force of the intestinal wall during the process of moving inside the intestine, but will always maintain the arc bending state. This arc bending design cooperates with the rotation of the third catheter 3 so that the front end of the third catheter 3 can accurately find the direction and smoothly advance when the intestinal wall bends and turns inside the intestine during the process of moving in the intestine, and the catheter will not be unable to turn. One end of a wire drawing 38 is fixed on the side of the tube wall at the front end position of the third conduit 3 facing the bending direction (i.e., the side of the tube wall at the end position of the arc bending section of the third conduit 3 facing the arc bending guide). The wire drawing 38 extends from the outside of the arc bending section of the third conduit 3 to the starting position of the arc bending section and enters from the wire drawing 38 channel at the starting position of the arc bending section of the third conduit 3 until it extends to the wire drawing push-pull terminal 37 in the rear end area of ​​the third conduit 3. The wire drawing push-pull terminal 37 is annular in shape and is easy to clamp with fingers. The wire drawing push-pull terminal 37 is sleeved on the rear end area of ​​the third conduit 3 to perform a small range of push and pull. When the wire drawing push-pull terminal 37 is pulled backward, the wire drawing 38 pulls the front end of the third conduit 3 to make the arc bending section more curved. A third balloon 31 is fixedly provided on the tube wall at the initial arc-shaped bend of the third catheter 3. The third balloon 31 is a compliant balloon. The third balloon 31 is used to inflate the third balloon 31 after the catheter moves to a designated position inside the intestine. After the third balloon 31 is inflated, the inner wall of the intestine is expanded and fixed to facilitate the subsequent normal operation of the catheter.

[0053] The wall of the third conduit 3 is sleeved with an eccentric clamping multi-spiral terminal 34, which is located at a distance in front of the wire drawing push-pull terminal 37. Two eccentric wheel fixing rings 341 on the eccentric clamping multi-spiral terminal 34 are spaced a certain distance apart. A plurality of eccentric clamping wheel grooves 343 (preferably 8) are evenly distributed on the inner circumference of the eccentric wheel fixing ring 341. An eccentric clamping wheel 344 is sleeved inside each eccentric clamping wheel groove 343 of the eccentric wheel fixing ring 341 through an eccentric sleeve of a rotating shaft, and each eccentric clamping wheel groove 343 is sleeved with an eccentric wheel 344 through an eccentric sleeve of a rotating shaft. The eccentricity of the rotating shaft of each eccentric clamping wheel 344 corresponds to the eccentric position on the eccentric wheel. When the eccentric wheel fixing ring 341 slides forward on the outer wall of the third conduit 3, the eccentric clamping wheels 344 inside the eccentric wheel fixing ring 341 rotate eccentrically toward the third conduit 3, so that all the eccentric clamping wheels 344 on the inner circumference of the eccentric wheel fixing ring 341 clamp the wall of the third conduit 3 synchronously. However, when the eccentric wheel fixing ring 344 slides backward on the outer wall of the conduit 3, the eccentric clamping wheels 344 When the eccentric clamping wheel 344 rotates eccentrically in the direction of disengaging from the third conduit 3, the eccentric clamping wheel 344 will not clamp the wall of the third conduit 3; the circumferential wheel surface of the eccentric clamping wheel 344 is designed to be a concave arc surface that matches the wall of the third conduit 3, so that the eccentric clamping wheel 344 can increase the contact area with the outer wall of the third conduit 3 as much as possible; the distribution and eccentric position of the eccentric clamping wheels 344 inside the two sets of eccentric wheel fixing rings 341 are uniformly corresponding, so that the two sets of eccentric wheel fixing rings 341 can be adjusted in a sliding manner. During the process, the eccentric clamping wheel 344 can be clamped at the same time. The two sets of eccentric wheel fixing rings 341 are fixedly connected by a connecting pipe 342 with an outer diameter smaller than that of the eccentric wheel fixing ring. The outer periphery of the connecting pipe 342 is sleeved with a sleeve 346 that can rotate flexibly. The purpose of using two sets of eccentric wheel fixing rings 341 is to prevent the eccentric wheel fixing ring 341 and the second guide tube 2 from being relatively skewed when there is only one set of eccentric wheel fixing rings 341 in the case of eccentric clamping. This situation will not occur if there are two sets of eccentric wheel fixing rings 341. Figures 8 to 11 As shown, the front end face of the front eccentric wheel fixing ring 341 is coaxially fixedly connected with a multi-threaded tube 345, and the multi-thread threads on the outer tube wall of the multi-threaded tube 345 coincide with the multi-threaded internal thread grooves 28 of the internal threaded end 27 of the second catheter 2, so that the multi-threaded tube 345 can be screwed into the internal threaded end 27. The front end of the multi-threaded tube 345 is designed to be conical, and the rear end and the eccentric wheel fixing ring 341 are also designed to be a conical structure. The multi-threaded tube 345 and the internal threaded end 27 are screwed together so that the third catheter 3 can be rotated when moving. This makes it easy for the third catheter 3 to move inside the intestine after extending out of the second catheter 2 by slight arc bending and rotation. The outer diameter of the eccentric wheel fixing ring 341 of the front group is larger than that of the eccentric wheel fixing ring of the rear group, because when the multi-threaded tube 345 and the internal threaded end 27 are screwed together and inserted, the eccentric wheel fixing ring 341 of the front group can block and limit the internal threaded end 27.

[0054] In the present invention, the rear end of the third catheter 3 is connected to a triangular catheter joint 35, the guide wire sleeve 4 passes through the triangular catheter joint 35, and a pressure-maintaining valve 36 is arranged in the triangular catheter joint 35; specifically, the rear end of the third catheter 3 is fixedly connected to the triangular catheter joint 35, the main joint of the triangular catheter joint 35 is for the guide wire sleeve 4 to pass through, and a pressure-maintaining valve 36 is fixedly arranged inside the main joint to prevent contrast agent and foul liquid from flowing out of the main joint, and also plays a role of unidirectional limiting the third catheter 3 in the axial backward direction; the auxiliary joint of the triangular catheter joint 35 is used for infusing contrast agent, and the contrast agent is infused from the front end of the third catheter 3 into the colon, mainly for infusing through the front end of the third catheter 3 when the contrast infusion hole of the second catheter 2 in the tail area of ​​the colon is not convenient for infusion.

[0055] In the present invention, a guide wire 41 is arranged in the guide wire sleeve 4, a marking ring 33 is arranged at the front end of the third catheter 3, and a push-pull terminal 42 is arranged at the rear end of the guide wire sleeve 4; a wire drawing push-pull terminal 37 is arranged on the side of the front end of the third catheter 3, and the wire drawing 38 is connected to the wire drawing push-pull terminal 37.

[0056] Specifically, if Figure 7 As shown, a guide wire sleeve 4 is sleeved inside the catheter 3, and the length of the guide wire sleeve 4 is longer than the third catheter 3. The front end of the guide wire sleeve 4 is also designed to be an arc-shaped bend in line with the front end of the second catheter 2. The front end of the guide wire sleeve 4 is designed to be a tapered structure. There is a marking ring 33 on the wall of the front end of the guide wire sleeve 4 at regular intervals. Several marking rings 33 evenly distributed at the front end of the guide wire sleeve 4 act as a scale. When the third catheter 3 reaches the specified position in the intestine and is filled and fixed in position by the third balloon 3, the guide wire sleeve 4 sleeved with the guide wire 41 is passed into the third catheter 3 and extended from the front end of the third catheter 3. The front end marking ring 33 of the guide wire sleeve 4 extending from the front end of the third catheter 3 and the marking ring 33 at the front end of the third catheter 3 form a starting position and an ending position. The evenly distributed marking rings after the front end marking ring of the guide wire sleeve 4 between the starting position and the ending position are used as length measurement scales. The size of the area of ​​the tumor lesion can be detected by contrast imaging, such as Fig.13 As shown, the rear end of the guide wire sleeve 4 is connected to a push-pull end 42, and the push-pull end 42 is in a circular I-shape, which is convenient for fingers to clamp the push-pull end 42 to push the movement of the guide wire sleeve 4. A guide wire 41 is sleeved inside the guide wire sleeve 4. When in use, the guide wire 41 is passed through the push-pull end 42 and extends from the front end of the guide wire sleeve 4.

[0057] During the process of advancing the invention inside the patient's colon, when the catheter needs to be turned and advanced at the bend in the colon, the attending physician clamps the sleeve of the eccentrically clamped multi-helical terminal 34 on the third catheter 3 with one finger, fixes the internal threaded terminal 27 of the second catheter 2 with the other hand to keep it still, and slides the eccentrically clamped multi-helical terminal 34 forward along the axial direction of the third catheter 3. At this time, the eccentric clamping wheel 344 inside the eccentrically clamping multi-helical terminal 34 rotates eccentrically toward the third catheter 3 to clamp the third catheter 3. The eccentrically clamping multi-helical terminal 34 drives the first catheter 3 to move forward synchronously. When it moves forward to the point where the multi-threaded tube 345 enters When the internal threaded terminal 27 is engaged, the sleeve 346 of the eccentric clamping multi-helical terminal 34 is clamped by fingers to drive the third catheter 3 to continue to move forward. Under the cooperation of the threads of the multi-threaded tube 345 and the internal threaded terminal 27, the eccentric clamping multi-helical terminal 34 rotates while moving forward. After the multi-threaded tube 345 is completely screwed into the internal threaded terminal 27, the fingers pull the eccentric clamping multi-helical terminal 34 backward through the sleeve 346. During the backward pulling process, the eccentric clamping wheel 344 inside the eccentric clamping multi-helical terminal 34 rotates eccentrically in the opposite direction to disengage from the outer tube wall of the third catheter 3, and the third catheter 3 does not follow the eccentric clamping multi-helical terminal 34 to move backward The eccentric clamping multi-helical end 34 is moved forward, and when the eccentric clamping multi-helical end 34 is pulled backward and rotated to disengage from the internal threaded end 27, the eccentric clamping multi-helical end 34 is continued to be pushed forward. At this time, the eccentric clamping wheel 344 continues to rotate eccentrically in the direction of the third catheter 3 to clamp the third catheter 3, and the eccentric clamping multi-helical end 34 drives the catheter 2 to move forward synchronously. Under the cooperation of the threads of the multi-threaded tube 345 and the internal threaded end 27, the eccentric clamping multi-helical end 34 continues to rotate while moving forward, and continues to drive the third catheter 3 to rotate and move forward, and then continues to cycle the above-mentioned operation of the eccentric clamping multi-helical end 34, so that the third catheter 3 is always moving forward. The front end extension part of the third catheter 3 can be smoothly pushed forward in the intestine under the movement of rotating and moving forward at the same time. Because the third catheter 3 is flexible and the front end part of the third catheter 3 has a slight arc curvature, under the guidance of the arc curvature structure and the unidirectional rotation, it can accurately find the direction and move smoothly when there is a curved intestinal wall inside the intestine. Because there may be intestinal directions with different degrees of curvature in the intestine, the wire drawing push end 37 is used to push or pull the wire drawing 38 to control the curvature of the arc curvature section at the front end of the third catheter 3, so as to facilitate passing through intestines with different curvatures.

[0058] In the present invention, when the marking ring 33 at the front end of the third catheter 3 and the marking ring at the front end of the guide wire sleeve 4 are located at the two ends of the diseased tumor, the marking ring at the front end of the guide wire sleeve 4 extending from the front end of the third catheter 3 and the marking ring 33 at the front end of the third catheter 3 form a starting position and an ending position, and the marking rings evenly distributed after the front end marking ring of the guide wire sleeve between the starting position and the ending position are used as length measurement scales. The size of the area of ​​the tumor lesion can be detected by contrast imaging, thereby determining the method of subsequent treatment.

[0059] like Figures 14 to 22 As shown, the specific operation steps of the present invention are implemented as follows:

[0060] Step 1: Fig.14 As shown, when it is needed to be used, the first catheter 1 in the uninflated state of the first balloon 12 is slowly inserted into the patient's anus. When the front end of the first catheter 1 is completely inserted into the patient's anus, the limit baffle 11 blocks the outside of the anus to prevent the catheter from being inserted into too many areas.

[0061] Step 2: Fig.15 As shown, a syringe is used to inject gas through the first balloon one-way inflation joint 13, and the gas is passed into the first balloon 12 to fill and fix the intestinal wall inside the anus. At this time, the first catheter 1 is relatively fixed to the anus, and the channel leading to the anus is also expanded, and the anus is sealed and blocked to prevent the dirty liquid inside the rectum from overflowing from the anus. The residual dirty liquid can be drained into the negative pressure drainage bag 19 through the spiral drainage groove 14 and the drainage channel 16, ensuring the cleanliness of the intestine.

[0062] Step 3: Fig.16 and Fig.17 As shown, the second catheter 2 and its related catheters are passed into the first catheter 1, and the second catheter 2, the third catheter 3 and the guide wire sleeve 4 are extended from the front end of the first catheter 1 under the traction of the guide wire 41. At this time, the second balloon 21, the filling balloon 26, and the third balloon 31 are all in an uninflated state. The guide wire sleeve 4 and the third catheter 3 are sequentially extended from the outer catheter thereof, and contrast agent is injected into the interior through the contrast infusion connector 23. The contrast agent is output from the contrast infusion hole 22 of the front section of the second catheter 2, and the contrast area A of the anorectal segment in front of the first balloon 12 is developed. After the contrast of the contrast area A is completed, in the subsequent steps, when the second catheter 2 and the third catheter 3 are transported to the entire long-distance intestine in front of the contrast area A, the second balloon 21 and the third balloon 31 are alternately filled during advancement to cause the second catheter 2 and the third catheter 3 to be peristaltically advanced.

[0063] Step 4: Fig.18As shown, after a sufficient amount of contrast agent is infused into the imaging area A, the second balloon 21 is inflated through the second balloon one-way inflation joint 24. When the second balloon 21 is filled and tightened to fix the inner wall of the intestine, the second catheter 2 is relatively fixed relative to the intestine in the axial direction, and the intestine is sealed and blocked at the same time. At this time, the guide wire sleeve 4 and the third catheter 3 are conveyed forward in the traction direction of the guide wire 41 until the filled balloon 26 is completely released from the gap between the second catheter 2 and the third catheter 3.

[0064] Step 5: Fig.19 As shown, gas is injected into the filling balloon 26 and the third balloon 31 respectively through the filling balloon one-way inflation joint 25 and the third balloon one-way inflation joint 32. After being filled, the third balloon 31 is expanded and fixed to the inner wall of the intestine, so that the third catheter 3 is fixed and sealed relative to the intestine in the axial direction. After being filled, the filling balloon 26 makes the empty space inside the intestine between the second balloon 21 and the third balloon 31 a circular cavity with closed ends, and this area is named as the contrast area B; after the contrast agent is injected through the contrast infusion hole 22, the contrast agent is evenly distributed in the contrast area B, because the filling balloon 26 is filled outward at the central axis of the intestine, so that the contrast agent can more easily contact the inner wall of the intestine to develop the intestinal wall, and the reduction of the spatial volume can make it easier for the contrast agent to contact the inside of the 360-degree circumference of the intestine, and can be more evenly infiltrated, avoiding the need for traditional contrast imaging to inject a large amount of contrast agent to completely fill the 360-degree circumference of the intestine.

[0065] Step 6: Fig. 20 As shown, after the contrast imaging of the contrast imaging area B is completed, the second balloon 21 and the filling balloon 26 are respectively exhausted through the second balloon one-way inflation joint 24 and the filling balloon one-way inflation joint 25, and the third balloon 31 remains filled. After the gas in the second balloon 21 and the filling balloon 26 is exhausted, the second catheter 2 is pushed forward axially to shorten the stroke difference between the second catheter 2 and the third catheter 3. When the front end of the second catheter 2 is close to the third balloon 31, the second catheter 2 is stopped from being pushed forward.

[0066] Step 7: Fig.21As shown, the second balloon 21 is inflated to a state of being tightly fixed on the inner wall of the intestine, so that the second catheter 2 is fixed axially relative to the intestine, and the third balloon 31 is deflated. After deflation is completed, the third catheter 3 and the guide wire sleeve 4 are pushed forward along the intestine. At this time, the stroke difference between the second catheter 2 and the third catheter 3 increases, so that the filling balloon 26 is completely released from the gap between the second catheter 2 and the third catheter 3 again, so that the axial spacing between the second balloon 21 and the third balloon 31 is equal to the spacing between the second balloon 21 and the third balloon 31 in the imaging area B; then the filling balloon 26 is filled and filled. Balloon 26 and the third balloon 31, the closed intestinal internal area between the second balloon 21 and the third balloon 31 is named as the contrast area C; since the axial length of the closed contrast area formed each time depends on the length when the filled balloon is completely released, when the second catheter 2 and the third catheter 3 are pushed for contrast imaging in the intestinal colon segment, the axial lengths of all the formed contrast areas are basically the same; after the contrast area C is formed, contrast agent is infused into the contrast area C through the contrast infusion hole 22, and after the contrast imaging of the contrast area C is completed, the above steps 6 to 8 are repeated for a cycle until the farthest end of the colon.

[0067] Step 8: Fig. 22 As shown, when the second catheter 2 and the third catheter 3 are advanced to the farthest end of the colon, since the colon lengths of different patients cannot be completely consistent, the remaining space at the tail end of the colon of some patients is insufficient to construct a contrast area after filling the second balloon 21 and the third balloon 31 during contrast imaging. At this time, the auxiliary connector of the triangular catheter connector 35 is used to infuse contrast agent, and the contrast agent is infused from the front end of the third catheter 3 into the colon to ensure that all areas of the entire colon can be imaged.

[0068] The present invention has the following advantages:

[0069] 1. Use equal distance segment-by-segment imaging from the proximal end to the distal end, and use the second catheter 2 and the third catheter 3 to cooperate with the second balloon 21 and the third balloon 31 to perform imaging segment-by-segment imaging in a similar peristaltic manner. The filling balloon 26 can limit the maximum stroke difference between the second catheter 2 and the third catheter 3 to the stroke difference when the filling balloon 26 is completely released. Because the front and rear balloons are alternately filled and exhausted, the imaging area of ​​the next segment will overlap with the imaging area of ​​the previous segment by the width of the second balloon 21 each time the segment is advanced segment by segment, which can ensure that no area is missed when the imaging is advanced to the distal end inside the colon. At the same time, the second balloon 21 and the third balloon 31 are blocked at both ends of the imaging area of ​​each segment during the peristaltic advancement of each segment. Sealing can prevent contrast agent overflow, so that the device can achieve uniform contrast for each section in the colon, with uniform contrast and clear imaging. Compared with relying on colon peristalsis to advance the two catheters section by section, the advancement speed can be greatly improved, saving a lot of time. In traditional contrast imaging, the catheter infuses contrast agent inside the colon, and the colon peristalsis alone is used to move the contrast agent to the entire colon area, which not only takes a lot of time, but also cannot guarantee that the inner wall of all areas inside the colon can be soaked with contrast agent, let alone guarantee the uniform distribution of contrast agent. Actual cases have shown that in traditional contrast imaging, the closer to the contrast agent infusion area, the more contrast agent is distributed, and the farther away, the sparser the distribution, which cannot guarantee clear imaging, easily leading to misdiagnosis of the patient's condition.

[0070] 2. One end of the filling balloon 26 is fixed on the second catheter 2, and the other end is fixed on the third catheter 3, which can ensure that the relative displacement difference between the second catheter 2 and the third catheter 3 during the transportation process does not exceed the axial length of the filling balloon 26, and has a limiting effect on the displacement stroke difference between the second catheter 2 and the third catheter 3. After the filling balloon 26 is filled, the circumferential outer diameter of the balloon is smaller than the inner diameter of the patient's intestinal inner wall. The filling balloon 26 fills outward at the central axis of the intestine to occupy the central space of the intestine, so that the contrast agent can only flow in the annular cavity area, which greatly increases the chance of the contrast agent contacting the intestinal inner wall, so that the contrast agent needs to be much less than the amount of contrast agent in traditional operation to complete the infiltration of the circumferential intestinal wall. The filling of the filling balloon 26 reduces the space volume and allows the contrast agent to more easily contact the 360-degree circumference of the intestine, which can be infiltrated more evenly, avoiding the need to inject a large amount of contrast agent to completely fill the 360-degree circumferential inner wall of the intestine in traditional imaging, and also reduces the burden on patients.

[0071] 3. The eccentric clamping multi-helical terminal 34 of the outer tube wall sleeve of the third catheter 3 mainly includes two parts: an eccentric wheel fixing ring 341 and a multi-threaded tube 345. The eccentric wheel of the eccentric wheel fixing ring 341 can clamp the third catheter 3 by eccentrically rotating forward, and can detach from the third catheter 3 by eccentrically rotating backward, so that the third catheter 3 can always keep moving forward when the eccentric clamping multi-helical terminal 34 is pushed back and forth.

[0072] 4. The multi-threaded tube 345 of the eccentrically clamped multi-helical terminal 34 cooperates with the internal threaded terminal 27. When the multi-threaded tube 345 is pushed forward, the multi-threaded tube 345 rotates and drives the third catheter 3 to rotate synchronously through the eccentric clamping wheel 344 clamped with the third catheter 3. When the multi-threaded tube 345 is pulled backward, the multi-threaded tube 345 rotates in the opposite direction. At this time, during the backward pulling process, the eccentric clamping wheel 344 is disengaged from the third catheter 3, so that when the multi-threaded tube 345 rotates in the opposite direction, the third catheter 3 will not rotate in the opposite direction, so that the multi-threaded tube 345 circulates back and forth in and out of the internal threaded terminal 27, so that the third catheter 3 always maintains a unidirectional rotational motion.

[0073] 5. The three-layer catheter design can make each step of the operation clearer, simpler, and more operations and effects can be achieved compared to the two-layer cannula, making the operation more stable. The first catheter 1 builds the channel, and the second catheter 2 and the third catheter 3 alternately perform peristaltic angiography section by section, with clear division of labor, simple operation, and obvious effect.

[0074] 6. The first catheter 1 is integrated into the anus to construct a channel. The first balloon 12 is used to fix the first catheter 1 relatively to the anus, and also expands the channel leading to the rectal section inside the anus. At the same time, it plays a role of sealing the anus to prevent the internal rectal filth from overflowing from the anus. The residual filth can be drained into the negative pressure drainage bag through the spiral drainage groove and the drainage channel, ensuring the cleanliness of the intestine.

[0075] 7. The slightly curved arc bending design of the front end area of ​​the second catheter 2 and the guide wire sleeve 4 can enable the catheter to smoothly find the direction and advance smoothly at the curved part of the intestine during the advancement of the catheter inside the intestine, and there will be no situation where the catheter cannot be turned. In addition, the front end arc bending section of the third catheter 3 adopts a wire drawing fixed through structure structure and the wire drawing push-pull end is used to control the wire drawing to control the curvature of the front end arc bending section of the third catheter 3 so as to pass through intestines with different curvatures.

[0076] 8. A number of marking rings 33 are evenly distributed at a certain length at the front end of the guide wire sleeve 4, which can be used as scales of a measuring tool in the tumor lesion area to detect the area and size of the tumor lesion area.

[0077] 9. Compared with the conventional single drainage hole 17, the spiral drainage groove 14 at the front end of the first catheter 1 can drain the liquid of 360 degrees around the outer circumference of the first catheter 1 into the spiral drainage groove 14, and there will be no situation where the residual contrast agent in the dead corner of the intestine in the designated area is not drained and inhaled. The single drainage hole can only drain and inhale the residual liquid when the drainage hole is turned to the lowest position of the tube wall, which has great limitations.

[0078] 10. The internal threaded end 27 of the second catheter 2, the triangular catheter joint 35 of the third catheter 3 and the push-pull end 42 of the guide wire sleeve 4 are all fixedly provided with a pressure-maintaining valve 36 which is evenly divided into a plurality of petals. The pressure-maintaining valve 36 can prevent the liquid inside the intestine from flowing out from the end of the catheter, and at the same time has a damping effect on the sliding third catheter 3, so that the third catheter 3 can stop sliding immediately after the pushing stops, and has a certain self-locking effect.

[0079] 11. The outer diameter of the front group of eccentric fixing rings 341 of the eccentric clamping multi-helical terminal 34 is larger than that of the rear group, which can play a role of limiting and blocking in the process of advancing to the internal threaded terminal 27. The limit stop plate fixedly arranged in the rear area of ​​the first balloon 12 on the first catheter 1 is also blocked outside the anus after the first catheter 1 enters the patient's anus to prevent the catheter from being passed into too many areas.

[0080] 12. The inflation connectors and infusion connectors of the first catheter 1, the second catheter 2, and the third catheter 3 and the auxiliary connectors of the triangular catheter connector 35 of the third catheter 3 are all connected with one-way vent valves to ensure that gas or liquid can only pass through in one direction. At the same time, the drainage tube of the outer tube is connected to a negative pressure drainage bag to ensure that the residual contrast agent and dirty liquid can be effectively sucked into the bag.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device, characterized in that: The invention comprises a first catheter, a second catheter sleeved in the first catheter, a third catheter sleeved in the second catheter, and a guide wire sleeve sleeved in the third catheter. The first catheter is provided with a limit stop plate, a first balloon and a first balloon one-way inflation joint. The first balloon is located in front of the limit stop plate, the first balloon one-way inflation joint is connected to the first balloon and the first balloon one-way inflation joint is located at the rear of the limit stop plate; the second catheter is provided with a second balloon, a contrast infusion hole, a contrast infusion joint, a second balloon one-way inflation joint and a filling balloon one-way inflation joint. The front end head is connected with one side of the filling balloon, the other side of the filling balloon is arranged on the third catheter, the second balloon one-way inflation joint is connected with the second balloon, the contrast infusion joint is connected with the contrast infusion hole, and the filling balloon one-way inflation joint is connected with the filling balloon; the third catheter is provided with a third balloon and a third balloon one-way inflation joint that are connected, the third balloon is at the front end of the filling balloon, the third balloon one-way inflation joint is at the rear side of the second balloon one-way inflation joint, a guide wire is arranged in the guide wire sleeve, and a marking ring is arranged at the front end of the third catheter; A spiral drainage groove is provided at the front end of the first catheter, and the spiral drainage groove smoothly extends into the tube wall of the first catheter to form a drainage channel after the number of spiral turns exceeds one circle, and the drainage channel is communicated with the drainage hole provided in the first catheter, and the drainage hole is communicated with the drainage tube, and the drainage tube is communicated with the negative pressure drainage bag; The rear end of the second conduit is provided with an internal thread end head, and the inner wall circumference of the internal thread end head is evenly distributed with a plurality of multi-line internal thread grooves.

2. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 1, characterized in that: A push-pull retaining ring is arranged at the rear end of the first conduit.

3. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 1, characterized in that: The second conduit is provided with a push-pull ring, and the push-pull ring is located at the front side of the internal thread end.

4. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 3, characterized in that: The third conduit is provided with an eccentric clamping multi-helix terminal, which includes two eccentric fixing rings and a connecting pipe. The two ends of the connecting pipe are respectively connected to the two eccentric fixing rings. The eccentric fixing ring is provided with a plurality of eccentric clamping wheel grooves, and an eccentric clamping wheel is provided in the eccentric clamping wheel groove.

5. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 4, characterized in that: The eccentric clamping wheel at the front side is connected to a multi-threaded tube, and the multi-threaded tube is threadably connected to the multi-threaded internal thread groove.

6. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 5, characterized in that: The rear end of the third catheter is connected with a triangular catheter joint, and the guide wire sleeve passes through the triangular catheter joint.

7. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 6, characterized in that: A pressure-maintaining valve is arranged in the triangular catheter joint.

8. The telescopic peristaltic multi-balloon colon retrograde gas-liquid dual contrast catheter device according to claim 7, characterized in that: The rear end of the guide wire sleeve is provided with a push-pull terminal.

Images