Aortic occlusion balloon device based on 18F-FDG detection and positioningTechnical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an aortic occlusion balloon device based on 18F-FDG detection and positioning.
Background
Alternative methods of aortic occlusion include direct clamping by emergency surgery and emergency intravascular balloon occlusion. The direct clamp for emergency surgery has the necessary condition of rescuing in the hospital operating room, and the emergency intravascular balloon blocking is the only currently available emergency technology under the condition of no unfolding operation, such as pre-hospital.
In the process of implementing the first-aid intravascular balloon occlusion, the catheter and the balloon need to be definitely guided into the lower section of the main artery, in the prior art, the mode of determining the extending positions of the catheter and the balloon is a rapid ultrasonic mode to judge whether the implanted catheter enters the lower section of the main artery, but the judging mode has high requirements on operators, is difficult to judge, and even if an experienced ultrasonic doctor is frequently affected by abdominal fat, intestinal tract qi and the like, misjudgment is caused. Yet another way to determine balloon position is X-ray judgment, but this method is difficult to develop under off-hospital emergency conditions; if the balloon is not released at the set position, the effective hemostatic effect is not achieved, and even the injury of tissue and organs can be caused.
Accordingly, the present invention provides an aortic occlusion balloon apparatus based on 18F-FDG probe localization.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to an aortic occlusion balloon device based on 18F-FDG detection and positioning, which comprises a catheter; the front end of the catheter is provided with a balloon, the balloon consists of an elastic membrane, the surface of the elastic membrane is provided with a liquid outlet, the interior of the catheter is penetrated with an injection tube, an annular partition plate is arranged between the end part of the injection tube, which is close to the balloon, and the inner wall of the catheter at the balloon, a diversion cavity is formed among the partition plate, the injection tube and the catheter, the side wall of the injection tube corresponding to the inner side of the diversion cavity is provided with a liquid outlet, the side wall of the catheter corresponding to the outer side of the diversion cavity is provided with an opening communicated with the balloon, and the rear end of the catheter is provided with an injector communicated with the injection tube; in the process of implementing the first-aid intravascular balloon occlusion, the catheter and the balloon need to be definitely guided into the lower section of the main artery, in the prior art, the mode of determining the extending positions of the catheter and the balloon is a rapid ultrasonic mode to judge whether the implanted catheter enters the lower section of the main artery, but the judging mode has high requirements on operators, is difficult to judge, and even if an experienced ultrasonic doctor is frequently affected by abdominal fat, intestinal tract qi and the like, misjudgment is caused. Yet another way to determine balloon position is X-ray judgment, but this method is difficult to develop under off-hospital emergency conditions; if the saccule is not released at the set position, the saccule can not have an effective hemostatic effect and even cause injury of tissues and organs; when the blocking balloon device is used, the catheter drives the balloon to move to the approximate position to be blocked, 3-5 milliliters of 18F-FDG liquid is firstly injected into the injection tube through the injector, so that the 18F-FDG liquid in the injection tube slightly swells after flowing into the balloon through the flow guide cavity, then the 18F-FDG liquid is released from a liquid outlet hole on the surface of the balloon and is submerged with organism negative electrons to release gamma rays, then the gamma rays are captured through the handheld gamma ray detector, the balloon positioning effect is realized, and then the injection tube supplements 10 milliliters of liquid into the balloon after the position of the balloon is accurately regulated, so that the complete filling of the balloon is realized, the fully swelled balloon surface is attached to the wall of a blood vessel at the moment, the blocking effect can be realized, the liquid outlet hole on the surface of the balloon is blocked, the continuous outflow of the injection liquid in the balloon is reduced, and the balloon can be stably and effectively operated; the device can assist in determining the general anatomical orientation of the saccule in the body before executing aortic occlusion hemostasis, increases the disposable saccule occlusion success rate, effectively overcomes the technical defects of ultrasonic positioning and X-ray radiation positioning, has the advantages that firstly, the technical capability and experience requirements for first-aid practitioners are lower, and the device can be mastered by program operation after simple training; secondly, 18F-FDG is a common medical agent, the availability and the medication cost are controllable, and the corresponding handheld gamma ray detector for 18F-FDG detection is low in cost and low in cost; thirdly, the technical operation procedure is simple, the risk of additionally increasing the bleeding time is small, and fourthly, the half-life period of 18F is short, and the secondary injury to patients is small.
Preferably, a guide wire pipe is arranged in the injection pipe in a penetrating manner, a guide wire body is arranged in the guide wire pipe, the rear end of the guide wire body is led in from the rear end of the catheter, and the front end of the guide wire body penetrates out from the front end of the catheter and can be used for guiding the catheter to be placed into the aortic lower section through the femoral artery; the guide wire structure is added on the catheter, so that the guide effect on the catheter and the balloon is enhanced through the guide wire, and the hard damage to the vessel wall possibly caused by the catheter and the balloon in the advancing process is reduced.
Preferably, the number of the liquid outlets on the side wall of the injection tube is not less than two groups, and the liquid outlets are annularly and uniformly distributed on the side wall of the injection tube; through setting up the quantity and the position of liquid outlet for the inside injection of injection can be even pack inside the sacculus, thereby the injection can follow more even release in the sacculus, improves the detection effect of follow-up sacculus position.
Preferably, the diameter of the catheter is 7-8F, the length of the catheter is 60-80cm, the distance between the balloon and the front end of the catheter is 8-12mm, the length of the balloon is 18-20mm, and the diameter of the balloon in the filling state is not more than 50mm; through setting up the size of pipe and sacculus, make it can be more effectual be applicable to the patient, reduce the unexpected injury that pipe and sacculus caused the patient in the use, can closely laminate through the sacculus wall when controlling not filling with the pipe wall of the pipe body simultaneously for the pipe can pass through the blood vessel smoothly, reduces the setting of sacculus and leads to the pipe to cause the circumstances of blocking in the blood vessel.
Preferably, two ends of an elastic membrane forming the balloon are respectively connected with the partition plates at two sides of the diversion cavity, an elastomer is arranged between the elastic membrane and the inner wall of the injection tube, and the surface of the elastic membrane is contracted in the catheter when the elastic membrane is in an unfilled state; by arranging the connection form of the balloon, when the catheter passes through the blood vessel, the balloon is contained inside the catheter under the action of the elastomer, so that the condition that the balloon protrudes outside the catheter and influences the movement of the catheter in the blood vessel is further reduced.
Preferably, the elastic body is an elastic telescopic bag, the side wall of the telescopic bag is wavy, the elastic body is connected to a liquid outlet on the side wall of the injection tube and is communicated with the interior of the injection tube, and a plurality of shrinkage holes are formed in the side wall of the telescopic bag; after the injection is filled into the injection inside the injection tube, the injection rate inside the injection firstly flows into the telescopic sac, so that the telescopic sac stretches and expands after being filled with liquid, the elastic membrane can be ejected out of the catheter, the opening of a liquid outlet hole on the elastic membrane is promoted, then the injection inside the telescopic sac flows into the balloon from the shrinkage hole and the flow guiding cavity, and can be released efficiently, the elastic membrane can be attached to the wall of a blood vessel more effectively under the action of the telescopic sac, and therefore a more effective blocking effect can be achieved on the blood vessel.
Preferably, a flexible adsorption layer is connected to the middle part of the inner wall of the elastic membrane, a flexible magnetic layer is connected to the side wall of the injection tube corresponding to the adsorption layer, and the flexible magnetic layer can attract the adjacent adsorption layer; after the sacculus work is finished, the adsorption layer on the elastic membrane is driven to be close to the flexible magnetic layer by the telescopic sacculus in the resetting process, so that the flexible magnetic layer is attracted to the adsorption layer to promote the elastic membrane to be more stably and effectively contained in the catheter.
Preferably, the liquid outlet hole is arranged at an elastic membrane at the adsorption layer, and the adsorption layer is provided with a diversion hole communicated with the liquid outlet hole; when the sacculus is required to plug a blood vessel, the position of the liquid outlet hole is arranged, so that the middle part of the elastic membrane which bulges at first is attached to the blood vessel wall, the blood vessel wall can effectively plug the liquid outlet hole, the situation that the elastic membrane is attached to the blood vessel wall inadequately due to the fact that the liquid outlet hole is arranged at the edge of the elastic membrane is reduced, and leakage of injection occurs is caused.
Preferably, an arc-shaped plugging bag is connected to the adsorption layer at the diversion hole, a liquid leakage cavity is arranged on the surface of the plugging bag, and the plugging bag is communicated with the shrinkage cavity of the telescopic bag through a hose; when the injection liquid filled in the telescopic bag is less, the liquid leakage cavity on the plugging bag is in an open state, so that the injection liquid can pass through the liquid leakage cavity and be released, when the saccule is required to plug a blood vessel, part of the injection liquid in the telescopic bag can flow into the plugging bag through the hose while the injection liquid in the telescopic bag is increased, so that the plugging bag can close the liquid leakage groove in expansion, and the leakage of the injection liquid in the diversion cavity from the liquid outlet hole on the elastic membrane is reduced.
Preferably, an elastic blocking ball is arranged on one side of the diversion hole, which is close to the blocking bag, and a pull rope is connected between the blocking ball and the side wall of the diversion hole; the blocking bag can press the elastic blocking ball into the diversion hole in the expansion process, so that the diversion hole is effectively closed, and the condition that the injection in the diversion cavity leaks outside the catheter is further reduced.
The beneficial effects of the invention are as follows:
1. the device can assist in determining the general anatomical orientation of the saccule in the body before executing aortic occlusion hemostasis, increases the disposable saccule occlusion success rate, effectively overcomes the technical defects of ultrasonic positioning and X-ray radiation positioning, has the advantages that firstly, the technical capability and experience requirements for first-aid practitioners are lower, and the device can be mastered by program operation after simple training; secondly, 18F-FDG is a common medical agent, the availability and the medication cost are controllable, and the corresponding handheld gamma ray detector for 18F-FDG detection is low in cost and low in cost; thirdly, the technical operation procedure is simple, the risk of additionally increasing the bleeding time is small, and fourthly, the half-life period of 18F is short, and the secondary injury to patients is small.
2. According to the invention, after the injection is filled into the injection tube, the injection rate in the injection tube flows into the telescopic bag firstly, so that the telescopic bag stretches and expands after being filled with liquid, the elastic membrane can be ejected out of the catheter to promote the opening of the liquid outlet hole on the elastic membrane, then the injection in the telescopic bag flows into the balloon from the shrinkage hole and the flow guiding cavity and can be released efficiently, the elastic membrane can be attached to the wall of a blood vessel more effectively under the action of the telescopic bag, and therefore, a more effective blocking effect can be achieved on the blood vessel, and after the balloon works, the elastic membrane can be pulled to be contained in the catheter more effectively after the telescopic bag is contracted and reset by pumping back the injection, so that the balloon and the catheter can be pulled out of the blood vessel conveniently.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a schematic view showing a partial structure of the inside of a catheter in the second embodiment;
in the figure: catheter 1, balloon 2, elastic membrane 3, syringe 4, baffle 5, liquid outlet 6, opening 7, syringe 8, wire guide tube 9, wire guide body 10, elastomer 11, adsorption layer 12, flexible magnetic layer 13, water conservancy diversion hole 14, shutoff bag 15, weeping chamber 16, hose 17, shutoff ball 18, stay cord 19.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1-3, an aortic occlusion balloon apparatus 2 based on 18F-FDG detection and localization according to an embodiment of the present invention includes a catheter 1; the front end of the catheter 1 is provided with a balloon 2, the balloon 2 consists of an elastic membrane 3, the surface of the elastic membrane 3 is provided with a liquid outlet, the interior of the catheter 1 is penetrated with an injection tube 4, an annular partition plate 5 is arranged between the end part of the injection tube 4, which is close to the balloon 2, and the inner wall of the catheter 1 at the balloon 2, a diversion cavity is formed among the partition plate 5, the injection tube 4 and the catheter 1, the side wall of the injection tube 4 corresponding to the inner side of the diversion cavity is provided with a liquid outlet 6, the side wall of the catheter 1 corresponding to the outer side of the diversion cavity is provided with an opening 7 communicated with the balloon 2, and the rear end of the catheter 1 is provided with an injector 8 communicated with the injection tube 4; in the process of blocking the balloon 2 in the first-aid blood vessel, the catheter 1 and the balloon 2 need to be definitely guided into the lower section of the main artery, in the prior art, the manner of determining the extending positions of the catheter 1 and the balloon 2 is to judge whether the implanted catheter 1 enters the lower section of the main artery or not by a rapid ultrasonic manner, but the judging manner has high requirements on operators, so that judgment is difficult, and even if an experienced sonographer is frequently affected by abdominal fat, intestinal tract qi and the like, misjudgment is caused. Yet another way to determine the balloon 2 position is X-ray judgment, but this method is difficult to develop under off-hospital emergency conditions; if the saccule 2 is not released at the set position, the effective hemostatic effect is not achieved, and even the injury of tissue and organs can be caused; when the blocking balloon 2 device is used, the catheter 1 drives the balloon 2 to move to the approximate position to be blocked, 3-5 milliliters of 18F-FDG liquid is firstly injected into the injection tube 4 through the injector 8, the 18F-FDG liquid in the injection tube 4 slightly swells after flowing into the balloon 2 through the flow guide cavity, then the 18F-FDG liquid is released from a liquid outlet hole on the surface of the balloon 2 and is submerged with negative electrons of a body to release gamma rays, then the effect of positioning the balloon 2 is realized by capturing the gamma rays through the handheld gamma ray detector, and then the balloon 2 is fully filled with 10 milliliters of liquid through the injection tube 4 after the position of the balloon 2 is accurately regulated, so that the surface of the balloon 2 fully swelled is attached to the wall of a blood vessel, the blocking effect can be realized on the blood vessel, the liquid outlet hole on the surface of the balloon 2 can be blocked, the continuous outflow of the injection liquid inside the balloon 2 can be reduced, and the balloon 2 can be stably and effectively operated; the device can assist in determining the general anatomical position of the saccule 2 in the body before executing aortic occlusion hemostasis, increases the blocking success rate of the disposable saccule 2, effectively overcomes the technical defects of ultrasonic positioning and X-ray radiation positioning, has the advantages that firstly, the device has lower technical capability and experience requirements for emergency enforcers, and can be mastered by program operation after simple training; secondly, 18F-FDG is a common medical agent, the availability and the medication cost are controllable, and the corresponding handheld gamma ray detector for 18F-FDG detection is low in cost and low in cost; thirdly, the technical operation procedure is simple, the risk of additionally increasing the bleeding time is small, and fourthly, the half-life period of 18F is short, and the secondary injury to patients is small.
The inside of the injection tube 4 is provided with a guide wire tube 9 in a penetrating way, the inside of the guide wire tube 9 is provided with a guide wire body 10, the rear end of the guide wire body 10 is led in from the rear end of the catheter 1, and the front end of the guide wire body 10 penetrates out from the front end of the catheter 1 and can be used for guiding the catheter 1 to be placed into the aortic lower section through the femoral artery; by adding the guide wire structure on the catheter 1, the guide effect on the catheter 1 and the balloon 2 is enhanced by the guide wire, which is beneficial to reducing the hard damage of the vessel wall possibly caused by the catheter 1 and the balloon 2 in the advancing process.
The number of the liquid outlets 6 on the side wall of the injection tube 4 is not less than two groups, and the liquid outlets are annularly and uniformly distributed on the side wall of the injection tube 4; through setting up the quantity and the position of liquid outlet 6 for the inside injection of injection 4 can be even pack inside sacculus 2, thereby the injection can follow more even release in the sacculus 2, improves the detection effect of follow-up sacculus 2 position.
The diameter of the catheter 1 is 7-8F, the length of the catheter 1 is 60-80cm, the distance between the balloon 2 and the front end of the catheter 1 is 8-12mm, the length of the balloon 2 is 18-20mm, and the diameter of the balloon 2 in the filling state is not more than 50mm; through setting up the size of pipe 1 and sacculus 2, make it can more effectual be applicable to the patient, reduce the unexpected injury that pipe 1 and sacculus 2 caused the patient in the use, can closely laminate through the sacculus 2 wall when controlling not filling and the pipe wall of pipe 1 body simultaneously for pipe 1 can pass through the blood vessel smoothly, reduces the setting of sacculus 2 and leads to the pipe 1 to cause the circumstances of blocking in the blood vessel.
The two ends of the elastic membrane 3 forming the balloon 2 are respectively connected with the partition plates 5 at the two sides of the diversion cavity, an elastic body 11 is arranged between the elastic membrane 3 and the inner wall of the injection tube 4, and the surface of the elastic membrane 3 is contracted in the catheter 1 when the elastic membrane 3 is in an unfilled state; by providing the connection form of the balloon 2, when the catheter 1 passes through the blood vessel, the balloon 2 is accommodated inside the catheter 1 under the action of the elastomer 11, so that the condition that the balloon 2 protrudes outside the catheter 1 and influences the movement of the catheter 1 in the blood vessel is further reduced.
The elastic body 11 is an elastic telescopic bag, the side wall of the telescopic bag is wavy, the elastic body 11 is connected to the liquid outlet 6 on the side wall of the injection tube 4 and is communicated with the interior of the injection tube 4, and a plurality of shrinkage holes are formed in the side wall of the telescopic bag; after the injection is filled into the injection tube 4, the injection rate in the injection tube flows into the telescopic bag firstly, so that the telescopic bag stretches and expands after being filled with liquid, the elastic membrane 3 can be ejected out of the catheter 1, the opening of a liquid outlet hole on the elastic membrane 3 is promoted, then the injection in the telescopic bag flows into the balloon 2 from the shrinkage cavity and the flow guiding cavity, and can be released efficiently, the elastic membrane 3 can be attached to the wall of a blood vessel more effectively under the action of the telescopic bag, and therefore a more effective blocking effect can be achieved on the blood vessel, and after the balloon 2 works, the telescopic bag can be contained in the catheter 1 more effectively after being contracted and reset by pumping back the injection, so that the balloon 2 and the catheter 1 can be conveniently pulled out of the blood vessel.
The middle part of the inner wall of the elastic membrane 3 is connected with a flexible adsorption layer 12, the side wall position of the side wall of the injection tube 4 corresponding to the adsorption layer 12 is connected with a flexible magnetic layer 13, and the flexible magnetic layer 13 can attract the adjacent adsorption layer 12; after the balloon 2 works, the telescopic bag drives the adsorption layer 12 on the elastic membrane 3 to be close to the flexible magnetic layer 13 in the resetting process, so that the flexible magnetic layer 13 promotes the elastic membrane 3 to be more stably and effectively contained in the catheter 1 through the attraction to the adsorption layer 12.
The liquid outlet hole is arranged at the elastic membrane 3 at the adsorption layer 12, and the adsorption layer 12 is provided with a diversion hole 14 communicated with the liquid outlet hole; when the sacculus 2 is required to plug a blood vessel, the position of the liquid outlet hole is arranged, so that the middle part of the elastic membrane 3 which bulges at first is attached to the wall of the blood vessel, the wall of the blood vessel can be effectively plugged, the liquid outlet hole is reduced because the liquid outlet hole is arranged at the edge of the elastic membrane 3, the attachment of the elastic membrane 3 and the wall of the blood vessel is not real, and the leakage of injection occurs.
Embodiment two:
as shown in fig. 4, in comparative example one, another embodiment of the present invention is: an arc-shaped blocking bag 15 is connected to the adsorption layer 12 at the position of the diversion hole 14, a liquid leakage cavity 16 is arranged on the surface of the blocking bag 15, and the blocking bag 15 is communicated with the shrinkage cavity of the telescopic bag through a hose 17; when the injection liquid filled in the telescopic bag is small, the liquid leakage cavity 16 on the blocking bag 15 is in an open state, so that the injection liquid can pass through the liquid leakage cavity 16 and be released, when the sacculus 2 is required to block a blood vessel, part of the injection liquid in the telescopic bag can flow into the blocking bag 15 through the hose 17 while the injection liquid in the telescopic bag is increased, so that the blocking bag 15 closes the liquid leakage groove in expansion, and the leakage of the injection liquid in the diversion cavity from the liquid outlet hole on the elastic membrane 3 is reduced.
An elastic blocking ball 18 is arranged on one side of the diversion hole 14 close to the blocking bag 15, and a pull rope 19 is connected between the blocking ball 18 and the side wall of the diversion hole 14; the blocking balloon 15 can press the elastic blocking ball 18 into the diversion hole 14 during the expansion process, so that the diversion hole 14 is closed more effectively, and the condition that the injection in the diversion cavity leaks outside the catheter 1 is further reduced.
Working principle: when the blocking balloon 2 device is used, the catheter 1 drives the balloon 2 to move to the approximate position to be blocked, 3-5 milliliters of 18F-FDG liquid is firstly injected into the injection tube 4 through the injector 8, so that the 18F-FDG liquid in the injection tube 4 slightly swells after flowing into the balloon 2 through the flow guide cavity, then the 18F-FDG liquid is released from a liquid outlet hole on the surface of the balloon 2 and is submerged with organism negative electrons to release gamma rays, the effect of positioning the balloon 2 is realized by capturing the gamma rays through the handheld gamma ray detector, then the balloon 2 is accurately adjusted, and then the injection tube 4 is used for supplementing 10 milliliters of liquid into the balloon 2, so that the completely filled balloon 2 is attached to the wall of a blood vessel, the blocking effect can be realized on the blood vessel, the liquid outlet hole on the surface of the balloon 2 can be blocked, the continuous outflow of the injection liquid inside the balloon 2 can be reduced, and the balloon 2 can be stably and effectively operated; the device can assist in determining the general anatomical position of the saccule 2 in the body before executing aortic occlusion hemostasis, increases the blocking success rate of the disposable saccule 2, effectively overcomes the technical defects of ultrasonic positioning and X-ray radiation positioning, has the advantages that firstly, the device has lower technical capability and experience requirements for emergency enforcers, and can be mastered by program operation after simple training; secondly, 18F-FDG is a common medical agent, the availability and the medication cost are controllable, and the corresponding handheld gamma ray detector for 18F-FDG detection is low in cost and low in cost; thirdly, the technical operation procedure is simple, the risk of additionally increasing the bleeding time is small, and the half-life period of 18F is short, so that the secondary injury to patients is small; the guide wire structure is added on the catheter 1, so that the guide effect on the catheter 1 and the balloon 2 is enhanced by the guide wire, and the hard damage to the blood vessel wall possibly caused by the catheter 1 and the balloon 2 in the advancing process is reduced; by arranging the number and the positions of the liquid outlets 6, the injection liquid in the injection tube 4 can be uniformly filled in the balloon 2, so that the injection liquid can be more uniformly released from the balloon 2, and the detection effect of the position of the subsequent balloon 2 is improved; through setting the sizes of the catheter 1 and the balloon 2, the catheter is more effectively suitable for patients, accidental injuries to the patients caused by the catheter 1 and the balloon 2 in the using process are reduced, meanwhile, the catheter 1 can smoothly pass through a blood vessel by controlling the close fit between the wall of the balloon 2 and the wall of the catheter 1 body when the balloon is not filled, and the blocking condition of the catheter 1 in the blood vessel caused by the setting of the balloon 2 is reduced; by arranging the connection form of the balloon 2, when the catheter 1 passes through the blood vessel, the balloon 2 is contained inside the catheter 1 under the action of the elastomer 11, so that the condition that the balloon 2 protrudes outside the catheter 1 to influence the movement of the catheter 1 in the blood vessel is further reduced; after the injection is filled into the injection tube 4, the injection rate in the injection tube flows into the telescopic bag firstly, so that the telescopic bag stretches and expands after being filled with liquid, the elastic membrane 3 can be ejected out of the catheter 1, the opening of a liquid outlet hole on the elastic membrane 3 is promoted, then the injection in the telescopic bag flows into the balloon 2 from the shrinkage hole and the flow guiding cavity and can be released efficiently, the elastic membrane 3 can be attached to the wall of a blood vessel more effectively under the action of the telescopic bag, and therefore a more effective blocking effect can be achieved on the blood vessel, and after the balloon 2 works, the telescopic bag can be retracted and reset by retracting the injection, the elastic membrane 3 can be pulled into the catheter 1 more effectively, and the balloon 2 and the catheter 1 can be pulled out from the blood vessel conveniently; after the balloon 2 works, the telescopic balloon drives the adsorption layer 12 on the elastic membrane 3 to be close to the flexible magnetic layer 13 in the resetting process, so that the flexible magnetic layer 13 promotes the elastic membrane 3 to be more stably and effectively contained in the catheter 1 through the attraction of the adsorption layer 12; when the balloon 2 is required to plug a blood vessel, the position of the liquid outlet hole is arranged, so that after the middle part of the elastic membrane 3 which bulges first is attached to the wall of the blood vessel, the wall of the blood vessel can effectively plug the liquid outlet hole, and the situation that the injection leaks due to the fact that the liquid outlet hole is arranged at the edge position of the elastic membrane 3 and the attachment of the elastic membrane 3 to the wall of the blood vessel is not real is reduced; when the injection liquid filled in the telescopic bag is less, the liquid leakage cavity 16 on the blocking bag 15 is in an open state, so that the injection liquid can pass through the liquid leakage cavity 16 and be released, when the sacculus 2 is required to block a blood vessel, part of the injection liquid in the telescopic bag can flow into the blocking bag 15 through the hose 17 while the injection liquid in the telescopic bag is increased, so that the liquid leakage groove is closed by the blocking bag 15 in the expansion process, and the situation that the injection liquid in the diversion cavity leaks from the liquid outlet hole on the elastic membrane 3 is reduced; the blocking balloon 15 can press the elastic blocking ball 18 into the diversion hole 14 during the expansion process, so that the diversion hole 14 is closed more effectively, and the condition that the injection in the diversion cavity leaks outside the catheter 1 is further reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, and that the foregoing embodiments and description are merely illustrative of the principles of this invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications fall within the scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.