CN113209454A

CN113209454A - Catheter

Info

Publication number: CN113209454A
Application number: CN202110449416.1A
Authority: CN
Inventors: 黄航; 李萍; 陈伟; 张方毅
Original assignee: First Affiliated Hospital of Wenzhou Medical University
Current assignee: First Affiliated Hospital of Wenzhou Medical University
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-08-06

Abstract

The invention discloses a catheter, which is characterized by comprising a catheter body, wherein the catheter body is provided with a liquid inlet, a flushing port, a balloon, a liquid outlet joint, a flushing joint, a release limiting joint, a liquid guide channel, a flushing channel and a release limiting channel; a pressing flusher which can extrude flushing medium into the flushing channel is externally connected to the flushing joint; the catheter also comprises a dredger used for cleaning the liquid guide channel, and the dredger comprises a brush part and a rod part. Can effectively avoid the emergence of drain channel jam and can effectively dredge after the drain channel blocks up.

Description

Catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a catheter.

Background

The catheter is a pipeline made of natural rubber, silicon rubber or polyvinyl chloride (PVC), can be inserted into the bladder through the urethra so as to drain urine, after the catheter is inserted into the bladder, an air bag is arranged at the end close to the end of the catheter to fix the catheter to stay in the bladder and not to be easily separated, and the drainage tube is connected with a urine bag to collect urine, so that the catheter is mainly suitable for: 1. dysuria due to various causes, 2, specific surgery, such as: the abdominal cavity, urinary tract, and gynaecology's etc. operation, 3, need to record the volume of urinating per unit time, a medical instrument that the hospital is commonly used, at present, along with medical instrument's continuous development, the catheter has developed to present two-chamber catheter and three chamber catheters by a single pipe before, and the front end of two-chamber catheter has the gasbag, can prevent the catheter slippage, and three chamber catheters are equipped with the washing pipe except that the front end has the gasbag, can wash bladder and catheter.

After a patient is subjected to conventional prostatectomy, bladder tumor electrosurgery or cystolith lithotripsy, a plurality of tissues or blood clots after the operation often remain in the bladder of the patient, and the remaining tissues or blood clots need to be washed out of the body of the patient as soon as possible so as to avoid the condition deterioration of the patient or the influence on the recovery of the patient caused by the remaining tissues or blood clots; because the drained washing liquid contains residual tissues or blood clots, the catheter can be blocked by the residual tissues or blood clots in the washing process, so that the washing and the drainage cannot be normally carried out, and a patient can feel painful; under the normal condition, the catheter needs to be replaced and the pain relieving treatment is needed due to unsmooth drainage, so that the working strength of medical personnel is increased, the cost of a patient is also increased, and a device capable of quickly and conveniently dredging the catheter when the catheter is blocked is needed.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a urinary catheter to solve the above problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a catheter comprises a catheter body made of medical silica gel, wherein the front end of the catheter body is provided with a liquid inlet, a flushing port and a balloon, the tail end of the catheter body is provided with a liquid outlet joint communicated with the liquid inlet, a flushing joint communicated with the flushing port and a release limiting joint communicated with the balloon, a liquid guide channel is communicated between the liquid inlet and the liquid outlet joint, a flushing channel is communicated between the flushing port and the flushing joint, a release limiting channel is communicated between the balloon and the release limiting joint, the liquid guide channel, the flushing channel and the release limiting channel are all positioned at the wall thickness of the side wall of the catheter body and extend along the length direction of the catheter body, the front end head of the catheter body is arranged in a smooth arc-shaped structure, the liquid inlet is arranged on the outer side wall of the catheter body close to the front end head, and the opening area of the liquid inlet is larger than the cross section area of the liquid guide channel, the flushing port is also arranged on the outer side wall of the catheter main body close to the front end head part, and the flushing port and the liquid inlet are distributed along the circumferential outer side wall of the catheter main body;

the flushing connector is externally connected with a pressing flusher capable of squeezing flushing media into the flushing channel, the pressing flusher comprises an air bag capable of being expanded in a natural state, the air bag comprises an inlet and an outlet, and the inlet and the outlet are respectively provided with a one-way valve only allowing the flushing media to enter the flushing channel; the catheter is characterized by further comprising a dredger used for cleaning the liquid guide channel, wherein the dredger comprises a brush part and a rod part, the brush part can be abutted to the inner side wall of the liquid guide channel, and the rod part is fixed at the tail end of the brush part and used for being controlled.

The invention is further configured to: the brush part is bent into a spiral structure by a rod material and has radial elastic deformation capacity, and the outer diameter of the brush part in a natural state is matched with the inner diameter of the liquid guide channel.

The invention is further configured to: still be provided with the regulation and control rope that is used for adjusting the front end radian of buckling of catheter main part on the catheter, be provided with the regulation and control passageway that supplies the regulation and control rope to penetrate in wall thickness department on the lateral wall of catheter main part, the length direction of regulation and control passageway extends the setting along the length direction of catheter main part, the one end of regulation and control passageway is close to the front end setting of catheter main part, and the other end passes the tail end of catheter main part, regulation and control rope sets up with regulation and control passageway clearance, the regulation and control rope penetrates the one end of regulation and control passageway and the front end fixed connection of catheter main part, and the other end stretches out from the regulation and control passageway.

The invention is further configured to: the catheter body is rotatably connected with a rotating wheel which is used for winding the tail end of the regulation rope and is close to the tail end, and the rotating wheel can pull the regulation rope to be pulled out of the regulation channel and wound on the rotating wheel in the rotating process.

The invention is further configured to: the anti-leakage device is characterized in that the anti-leakage joint is connected with a two-way valve, and the two-way valve comprises an anti-leakage one-way valve structure which can be used for allowing external filling media to be injected into the balloon and can limit the filling media to be leaked out, and a safety one-way valve structure which can be communicated with the outside when the pressure of the filling media in the balloon is larger than a set value.

The invention is further configured to: the air inlet channel is taken off to limit that the check valve structure was taken off including setting up on the two-way valve can switch on with the external world all the time, and can take off the gas passage with the limit that the passageway switches on all the time, and the limit that is used for the shutoff limit to take off the gas passage takes off the shutoff piece, and can be under natural state the limit that the shutoff piece shutoff limit is taking off the gas passage takes off the elastic component, the limit is taken off the gas passage and is taken off the gas passage intercommunication setting with the limit, limit takes off elastic component elasticity butt in the limit and takes off between shutoff piece and the two-way valve.

The invention is further configured to: the bidirectional valve is screwed with a release-limiting bolt for regulating and controlling the acting force of a release-limiting elastic piece for pushing the release-limiting plugging piece to block the release-limiting air inlet channel, and the release-limiting elastic piece is elastically abutted between the release-limiting plugging piece and the release-limiting bolt.

The invention is further configured to: the safety check valve structure comprises a safety air inlet channel, a safety air outlet channel, a safety plugging piece and a safety elastic piece, wherein the safety air inlet channel can be communicated with the limit air outlet channel all the time on the two-way valve, the safety air outlet channel can be communicated with the outside all the time, the safety plugging piece is used for plugging the safety air inlet channel, the safety elastic piece can push the safety plugging piece to plug the safety air inlet channel all the time under a natural state, the safety air inlet channel is communicated with the safety air outlet channel, and the safety elastic piece is elastically abutted between the safety plugging piece and the two-way valve.

The invention is further configured to: the two-way valve is connected with a safety bolt for regulating and controlling the acting force of the safety elastic piece for pushing the safety plugging piece to plug the safety air inlet channel in a screwed mode, and the safety elastic piece is elastically abutted between the safety plugging piece and the safety bolt.

The invention is further configured to: the limit is taken off the middle part that the check valve structure is located the check valve and inserts limit and take off one end in the passageway, the tip that the check valve is used for inserting limit and takes off the passageway is provided with the jack catch that can take off the inside wall butt of passageway with the limit, the jack catch is provided with a plurality ofly and each jack catch centers on limit and takes off the check valve structure and forms the ring structure setting, all leaves the deformation clearance between the two adjacent jack catches, the spiro union has the collar that can cooperate the jack catch to fix the check valve centre gripping on limit takes off the passageway on the check valve, the collar is including the screw hole and the bell mouth of coaxial setting, the big footpath end of bell mouth sets up towards the screw hole, and bell mouth and jack catch correspond the setting when the collar passes through the screw hole spiro union on the check valve.

In conclusion, the invention has the following beneficial effects: the pressing flusher can quickly squeeze other flushing media such as air, water and the like into the flushing channel, so that the flushing port can achieve the aim of flushing foreign matters such as blood clots and the like, and the blockage of the liquid guide channel can be avoided to the greatest extent; and set the dredge, thereby can control brush portion through pole portion and slide or rotate in drain passageway and play the washing to drain passageway, or dredge the effect of blocking up foreign matters such as clot in drain passageway, can be at utmost effectively dredge after drain passageway blocks up, can effectively avoid the problem of plugging and unplugging the catheter repeatedly after drain passageway blocks up, greatly reduced medical staff's nursing work.

Drawings

Fig. 1 is a schematic structural view of a urinary catheter;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is an enlarged view of the portion B of FIG. 1;

fig. 4 is an enlarged schematic view of the portion C in fig. 1.

Reference numerals: 1. a catheter body; 11. a liquid outlet joint; 111. a drainage channel; 112. a liquid inlet; 12. flushing the joint; 121. flushing the channel; 122. flushing the opening; 13. limiting the release of the joint; 131. a disengagement-limiting channel; 132. a balloon; 14. regulating and controlling a channel; 2. pressing the flusher; 3. a dredger; 4. regulating and controlling the ropes; 41. a rotating wheel; 5. a two-way valve; 51. a disengagement-limiting one-way valve structure; 511. a disengagement-limiting air inlet passage; 512. restricting the gas escape passage; 513. limiting the removal of the plugging piece; 514. a disengagement-limiting elastic member; 515. limiting the bolt to be removed; 52. a safety check valve structure; 521. a safe air intake passage; 522. a safe air outlet channel; 523. a safety block; 524. a safety elastic member; 525. a safety bolt; 53. a claw; 54. a deformation gap; 55. a mounting ring; 551. a threaded hole; 552. and (4) a tapered hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-4, a catheter comprises a catheter body 1 made of medical silica gel, a liquid inlet 112, an irrigation opening 122 and a balloon 132 are arranged at the front end of the catheter body 1, a liquid outlet connector 11 communicated with the liquid inlet 112, an irrigation connector 12 communicated with the irrigation opening 122 and a limited detachment connector 13 communicated with the balloon 132 are arranged at the tail end of the catheter body 1, a liquid guide channel 111 is communicated between the liquid inlet 112 and the liquid outlet connector 11, an irrigation channel 121 is communicated between the irrigation opening 122 and the irrigation connector 12, a limited detachment channel 131 is communicated between the balloon 132 and the limited detachment connector 13, and the liquid guide channel 111, the irrigation channel 121 and the limited detachment channel 131 are all located at the wall thickness of the side wall of the catheter body 1 and extend along the length direction of the catheter body 1; the tip portion of the front end of catheter main part 1 becomes slick and sly arc structure setting, inlet 112 is seted up on catheter main part 1 on the lateral wall that is close to the tip portion, and inlet 112's open area is greater than the cross sectional area of drain channel 111, the tip portion shape of the front end of catheter main part 1 is favorable to improving the convenient degree of putting the pipe of catheter, and inlet 112 set up the position and can effectively avoid holding up drain channel 111 when pressing in organizing at the tip portion of the front end of catheter main part 1, and inlet 112 that is located on catheter main part 1 lateral wall can make its opening bigger, thereby can effectively avoid foreign matter such as blood clot to block up at inlet 112, also can effectively improve the smooth and easy degree of drainage of catheter.

Rinse mouthful 122 and also offer on catheter body 1 on the lateral wall that is close to the front end head to wash mouthful 122 and inlet 112 along catheter body 1's circumference lateral wall distribution setting, make should wash mouthful 122 and more be close to inlet 112, be favorable to improving the flush liquid when rinsing and discharge smooth and easy degree and wash the effect. The flushing connector 12 is externally connected with a pressing flusher 2 capable of squeezing flushing media into the flushing channel 121, the pressing flusher 2 comprises an air bag capable of being expanded in a natural state, the air bag comprises an inlet and an outlet, and the inlet and the outlet are respectively provided with a one-way valve only for the flushing media to enter the flushing channel 121. The structure is simple and easy to implement, the operation is simple and convenient, and the convenience degree of medical staff in nursing work is favorably improved. The pressing flusher 2 is preferably detachably connected with the flushing joint 12, so that medical staff can conveniently mount and use the pressing flusher when needed, and meanwhile, the pressing flusher can be dismounted under the condition that the pressing flusher is not needed to be used, and the phenomenon that a wearer presses the air bag by mistake is avoided. The catheter also comprises a dredging device 3 for cleaning the liquid guide channel 111, and the dredging device 3 comprises a brush part which can be abutted against the inner side wall of the liquid guide channel 111 and a rod part which is fixed at the tail end of the brush part and used for controlling.

The pressing flusher 2 can quickly squeeze other flushing media such as air and water into the flushing channel 121, so that the flushing port 122 can flush foreign matters such as blood clots, and the like, and the blockage of the liquid guide channel 111 can be avoided to the greatest extent; and set dredge 3, thereby can control brush portion through pole portion and slide or rotate in drain channel 111 and play the washing to drain channel 111, or dredge the effect of foreign matter such as the blood clot of stifled in drain channel 111, can be at utmost effectively dredge after drain channel 111 blocks up, can effectively avoid the problem of drawing and inserting the catheter repeatedly after drain channel 111 blocks up, greatly reduced medical staff's nursing work.

The brush part is bent into a spiral structure by a rod material and has radial elastic deformation capacity, and the outer diameter of the brush part in a natural state is matched with the inner diameter of the liquid guide channel 111. Spiral brush portion both can play the washing to drain channel 111 inside wall when the axial slides, also can realize carrying out effective centre gripping to foreign matter such as bold or difficult exhaust blood clot when the axial rotates, and then be convenient for take out it from drain channel 111, improved the nimble degree of use and the application scope of dredge 3 greatly.

Still be provided with the regulation and control rope 4 that is used for adjusting the front end radian of buckling of catheter main part 1 on the catheter, be provided with the regulation and control passageway 14 that supplies regulation and control rope 4 to penetrate in wall thickness department on the lateral wall of catheter main part 1, the length direction of regulation and control passageway 14 extends the setting along the length direction of catheter main part 1, the one end of regulation and control passageway 14 is close to the front end setting of catheter main part 1, the other end passes the tail end of catheter main part 1, regulation and control rope 4 sets up with regulation and control passageway 14 clearance, regulation and control rope 4 penetrates the one end of regulation and control passageway 14 and the front end fixed connection of catheter main part 1, the other end stretches out from regulation and control passageway 14. Regulation and control rope 4 can be twitched in regulation and control passageway 14, can drive the front end head portion of catheter main part 1 through being fixed the one end on catheter main part 1 and buckle to the reverse 4 one sides of regulation and control rope of buckling of the front end head portion of catheter main part 1, and then be favorable to improving the smooth and easy degree when the catheter inserts the person of wearing the urethra, and the convenient degree when medical personnel operate, work efficiency when medical personnel insert the catheter has been improved greatly.

A rotating wheel 41 for winding the tail end of the control rope 4 is rotatably connected to the catheter body 1 near the tail end, and the rotating wheel 41 can pull the control rope 4 to be pulled out from the control channel 14 and wound on the rotating wheel 41 in the rotating process. When the rotating wheel 41 is rotated, the regulation and control rope 4 can be pulled out from the regulation and control channel 14, so that the front end head part of the catheter body 1 can be conveniently driven to be bent, the operation and control are simple and convenient, and the use sanitation of the catheter can be favorably improved.

The two-way valve 5 is connected to the disengagement-limiting joint 13, and the two-way valve 5 includes a disengagement-limiting one-way valve structure 51 capable of allowing an external filling medium to be injected into the balloon 132 and limiting the leakage of the filling medium, and a safety one-way valve structure 52 capable of being communicated with the outside when the pressure of the filling medium in the balloon 132 is greater than a set value. The two-way valve 5 can inject water, air and other filling media into the balloon 132 through the release-limiting one-way valve structure 51, and can prevent the filling media in the balloon 132 from leaking out, so that the catheter can be fixed through the balloon 132 after being placed; the anti-release one-way valve structure 51 can enable the balloon 132 to be communicated with the outside when the pressure applied to the filling medium in the balloon 132 is greater than a set value, namely, part of the filling medium is leaked out until the pressure applied to the filling medium in the balloon 132 is recovered to the set value, the design can effectively avoid the injury to the urethra when a patient with poor spirit, intelligence and the like pulls out the catheter by mistake, and the set value of the pressure of the balloon 132 can refer to the urethra bearing capacity of the wearer in the age group; the catheter is safer in use, because when the balloon 132 is filled through the anti-release one-way valve structure 51, the safety one-way valve structure 52 can be effectively controlled when the pressure received by the balloon 132 is higher than a set value, so that the safety of the balloon 132 is improved during filling or the catheter is used, and the injury to the urethra is effectively avoided.

The release-limiting one-way valve structure 51 comprises a release-limiting air inlet channel 511 which is arranged on the two-way valve 5 and can be always communicated with the outside, a release-limiting air inlet channel 512 which can be always communicated with the release-limiting channel 131, a release-limiting blocking piece 513 for blocking the release-limiting air inlet channel 511, and a release-limiting elastic piece 514 which can push the release-limiting blocking piece 513 to block the release-limiting air inlet channel 511 all the time in a natural state, wherein the release-limiting air inlet channel 511 is communicated with the release-limiting air inlet channel 512, and the release-limiting elastic piece 514 is elastically abutted between the release-limiting blocking piece 513 and the two-way valve 5. The separation-limiting air inlet passage 511 and the separation-limiting air passage 512 can be arranged in a 7-shaped structure, the separation-limiting plugging piece 513 is positioned at the intersection of the separation-limiting air inlet passage 511 and the separation-limiting air passage 512, and the separation-limiting plugging piece 513 can be arranged in a spherical structure; when filling media need to be injected into the balloon 132, the pressure at the injection end is greater than the acting force of the release limiting elastic piece 514 on the release limiting blocking piece 513, so that the release limiting blocking piece 513 can be pushed to leave, the filling media can be injected into the release limiting channel 131, the release limiting blocking piece 513 can block the release limiting air inlet channel 511 under the acting force of the release limiting elastic piece 514 after the filling media are injected into the balloon 132, the leakage of the filling media in the balloon 132 can be effectively avoided, and the structure is simple and easy to implement.

The two-way valve 5 is screwed with a release-limiting bolt 515 for regulating and controlling the acting force of a release-limiting elastic piece 514 pushing a release-limiting blocking piece 513 to block the release-limiting air inlet channel 511, and the release-limiting elastic piece 514 is elastically abutted between the release-limiting blocking piece 513 and the release-limiting bolt 515. The arrangement of the release-limiting bolt 515 enables the acting force of the release-limiting elastic piece 514 on the release-limiting blocking piece 513 to be adjustable, and is beneficial to improving the flexible use degree and the application range of the release-limiting one-way valve structure 51.

The safety one-way valve structure 52 comprises a safety air inlet channel 521 which is arranged on the two-way valve 5 and can be communicated with the release limiting channel 131 all the time, a safety air outlet channel 522 which can be communicated with the outside all the time, a safety blocking piece 523 used for blocking the safety air inlet channel 521, and a safety elastic piece 524 which can push the safety blocking piece 523 to block the safety air inlet channel 521 all the time in a natural state, wherein the safety air inlet channel 521 is communicated with the safety air outlet channel 522, and the safety elastic piece 524 is elastically abutted between the safety blocking piece 523 and the two-way valve 5. The safety air inlet channel 521 and the safety air outlet channel 522 can be arranged in a 7-shaped structure, the safety blocking piece 523 is positioned at the intersection of the safety air inlet channel 521 and the safety air outlet channel 522, and the safety blocking piece 523 can be arranged in a spherical structure; when the pressure of the filling medium acting on the safety blocking piece 523 is greater than the acting force of the safety elastic piece 524 acting on the safety blocking piece 523, the safety blocking piece 523 can be pushed to be away, so that the filling medium is leaked, that is, the pressure of the filling medium in the balloon 132 is greater than a set value, and when the pressure of the filling medium acting on the safety blocking piece 523 is less than the acting force of the safety elastic piece 524 acting on the safety blocking piece 523, the safety blocking piece 523 can block the safety air inlet channel 521 under the acting force of the safety elastic piece 524, so that the filling medium in the balloon 132 can be prevented from leaking.

The two-way valve 5 is screwed with a safety bolt 525 for regulating and controlling the acting force of the safety elastic piece 524 for pushing the safety blocking piece 523 to block the safety air inlet channel 521, and the safety elastic piece 524 is elastically abutted between the safety blocking piece 523 and the safety bolt 525. The arrangement of the safety bolt 525 enables the acting force of the safety elastic member 524 on the safety blocking member 523 to be adjustable, which is beneficial to improving the flexibility and application range of the safety check valve structure 52.

The anti-release check valve structure 51 is located in the middle of one end of the two-way valve 5 inserted into the anti-release passage 131, the end of the two-way valve 5 inserted into the anti-release passage 131 is provided with a plurality of claws 53 capable of abutting against the inner side wall of the anti-release passage 131, each claw 53 is provided with a plurality of claws 53 surrounding the anti-release check valve structure 51 to form a ring structure, a deformation gap 54 is reserved between two adjacent claws 53, the two-way valve 5 is screwed with a mounting ring 55 capable of being matched with the claws 53 to clamp and fix the two-way valve 5 on the anti-release passage 131, the mounting ring 55 comprises a threaded hole 551 and a tapered hole 552 which are coaxially arranged, the large-diameter end of the tapered hole 552 is arranged towards the threaded hole 551, and the tapered hole 552 and the claws 53 are correspondingly arranged when the mounting ring 55 is screwed on the two-way valve 5 through the threaded hole 551. The mounting ring 55 can cooperate each jack catch 53 to take off the lateral wall centre gripping of passageway 131 with the limit when the spiro union is on two-way valve 5 fixed to each jack catch 53 can draw in gradually under the effect of bell mouth 552 inside wall, plays the elasticity centre gripping of taking off passageway 131 to the limit, thereby has improved two-way valve 5 greatly and has taken off the firm in connection degree of passageway 131 with the limit, and then has effectively improved two-way valve 5's use stability.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A catheter comprises a catheter body (1) made of medical silica gel, wherein a liquid inlet (112), a flushing port (122) and a balloon (132) are arranged at the front end of the catheter body (1), a liquid outlet connector (11) communicated with the liquid inlet (112), a flushing connector (12) communicated with the flushing port (122) and a release limiting connector (13) communicated with the balloon (132) are arranged at the tail end of the catheter body (1), a liquid guide channel (111) is communicated between the liquid inlet (112) and the liquid outlet connector (11), a flushing channel (121) is communicated between the flushing port (122) and the flushing connector (12), a limited release channel (131) is communicated between the balloon (132) and the release limiting connector (13), and the liquid guide channel (111), the flushing channel (121) and the limited release channel (131) are all located at the wall thickness of the side wall of the catheter body (1), and all extend the setting along the length direction of catheter main part (1), characterized by: the front end head of the catheter main body (1) is arranged in a smooth arc structure, the liquid inlet (112) is formed in the outer side wall, close to the front end head, of the catheter main body (1), the opening area of the liquid inlet (112) is larger than the cross section area of the liquid guide channel (111), the flushing port (122) is also formed in the outer side wall, close to the front end head, of the catheter main body (1), and the flushing port (122) and the liquid inlet (112) are distributed along the circumferential outer side wall of the catheter main body (1);

the flushing connector (12) is externally connected with a pressing flusher (2) capable of squeezing flushing media into the flushing channel (121), the pressing flusher (2) comprises an air bag capable of being expanded in a natural state, the air bag comprises an inlet and an outlet, and the inlet and the outlet are respectively provided with a one-way valve only used for enabling the flushing media to enter the flushing channel (121); the catheter also comprises a dredger (3) used for cleaning the liquid guide channel (111), wherein the dredger (3) comprises a brush part which can be abutted against the inner side wall of the liquid guide channel (111) and a rod part which is fixed at the tail end of the brush part and used for controlling.

2. A catheter as in claim 1 wherein: the brush part is bent into a spiral structure by a rod material and has radial elastic deformation capacity, and the outer diameter of the brush part in a natural state is matched with the inner diameter of the liquid guide channel (111).

3. A catheter as in claim 1 wherein: still be provided with regulation and control rope (4) that are used for adjusting the front end radian of buckling of catheter main part (1) on the catheter, be provided with regulation and control passageway (14) that supply regulation and control rope (4) to penetrate in wall thickness department on the lateral wall of catheter main part (1), the length direction of regulation and control passageway (14) extends the setting along the length direction of catheter main part (1), the one end of regulation and control passageway (14) is close to the front end setting of catheter main part (1), and the other end is worn out from the tail end of catheter main part (1), regulation and control rope (4) and regulation and control passageway (14) clearance setting, the one end that regulation and control passageway (14) penetrated regulation and control rope (4) and control the front end fixed connection of catheter main part (1), and the other end stretches out from regulation and control passageway (14).

4. A catheter as claimed in claim 3 wherein: the catheter body (1) is rotatably connected with a rotating wheel (41) which is used for winding the tail end of the regulating rope (4) and is close to the tail end, and the rotating wheel (41) can pull the regulating rope (4) out of the regulating channel (14) and wind the regulating rope (4) on the rotating wheel (41) in the rotating process.

5. A catheter as in claim 1 wherein: the anti-release joint (13) is connected with a two-way valve (5), and the two-way valve (5) comprises an anti-release one-way valve structure (51) which can be used for injecting external filling media into the balloon (132) and can limit the leakage of the filling media and a safety one-way valve structure (52) which can be communicated with the outside when the pressure of the filling media in the balloon (132) is greater than a set value.

6. A catheter as claimed in claim 5 wherein: the anti-release one-way valve structure (51) comprises an anti-release air inlet channel (511) which is arranged on the two-way valve (5) and can be always communicated with the outside, an anti-release air outlet channel (512) which can be always communicated with the anti-release channel (131), an anti-release blocking piece (513) used for blocking the anti-release air inlet channel (511), and an anti-release elastic piece (514) which can be used for always pushing the anti-release blocking piece (513) to block the anti-release air inlet channel (511) in a natural state, wherein the anti-release air inlet channel (511) and the anti-release air outlet channel (512) are communicated and arranged, and the anti-release elastic piece (514) is elastically abutted between the anti-release blocking piece (513) and the two-way valve (5).

7. A catheter as in claim 6 wherein: the bidirectional valve (5) is screwed with a release-limiting bolt (515) for regulating and controlling the acting force of a release-limiting elastic piece (514) for pushing a release-limiting blocking piece (513) to block a release-limiting air inlet channel (511), and the release-limiting elastic piece (514) is elastically abutted between the release-limiting blocking piece (513) and the release-limiting bolt (515).

8. A catheter as claimed in claim 5 wherein: the safety one-way valve structure (52) comprises a safety air inlet channel (521) which is arranged on the two-way valve (5) and can be always communicated with the release limiting channel (131), a safety air outlet channel (522) which can be always communicated with the outside, a safety blocking piece (523) used for blocking the safety air inlet channel (521), and a safety elastic piece (524) which can be used for pushing the safety blocking piece (523) to block the safety air inlet channel (521) all the time in a natural state, wherein the safety air inlet channel (521) is communicated with the safety air outlet channel (522), and the safety elastic piece (524) is elastically abutted between the safety blocking piece (523) and the two-way valve (5).

9. A catheter as in claim 6 wherein: the bidirectional valve (5) is connected with a safety bolt (525) for regulating and controlling the acting force of a safety elastic piece (524) for pushing the safety blocking piece (523) to block the safety air inlet channel (521) in a screwed mode, and the safety elastic piece (524) is elastically abutted between the safety blocking piece (523) and the safety bolt (525).

10. A catheter as claimed in claim 5 wherein: the anti-dropping check valve structure (51) is located in the middle of one end, inserted into the anti-dropping channel (131), of the two-way valve (5), the end, used for being inserted into the anti-dropping channel (131), of the two-way valve (5) is provided with a plurality of clamping jaws (53) capable of being abutted against the inner side wall of the anti-dropping channel (131), each clamping jaw (53) is arranged in a ring-shaped structure around the anti-dropping check valve structure (51), a deformation gap (54) is reserved between every two adjacent clamping jaws (53), the two-way valve (5) is screwed with a mounting ring (55) capable of being matched with the clamping jaws (53) to clamp and fix the two-way valve (5) on the anti-dropping channel (131), the mounting ring (55) comprises a threaded hole (551) and a tapered hole (552) which are coaxially arranged, the large-diameter end of the tapered hole (552) is arranged towards the threaded hole (551), and the tapered hole (552) and the clamping jaws (53) are correspondingly arranged when the mounting ring (55) is screwed on the two-way valve (5) through the threaded hole (551) And (4) placing.