CN213466461U - Plugging balloon catheter externally sleeved on bronchoscope - Google Patents

Abstract

The utility model discloses a plugging balloon catheter externally sleeved on a bronchoscope, which comprises a balloon main body, a catheter and an inflation/liquid part; the balloon main body comprises a hollow tubular structure and a balloon body wrapped on the outer surface of the hollow tubular structure, a first end of the catheter is communicated with the balloon body, a second end of the catheter is connected with an inflation/liquid component, and the inflation/liquid component inflates/liquid into the balloon body through the catheter; a hanger is arranged on the outer wall near the second end of the conduit; the inflation/liquid part is provided with a switch component, and the balloon can be automatically inflated with gas or liquid by turning on the inflation/liquid part; in the uninflated/liquid state, the balloon is affixed to the hollow tubular structure, and in the inflated/liquid state, the balloon bulges forming a balloon around the hollow tubular structure. The utility model provides a cavity tubular structure cover in the sacculus main part is at the tip of bronchoscope, and convenient operation need not to borrow solitary personnel and operates, does not occupy working channel.

Description

Plugging balloon catheter externally sleeved on bronchoscope

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to overcoat is in shutoff sacculus pipe of bronchoscope.

Background

At present, the bronchoscope is easy to cause the bleeding of bronchus in the clinical relevant operation, when the excessive bleeding amount causes the heavy bleeding, the problems of blocking of the air passage, suffocation and the like which threaten the life of a patient are easy to cause, and therefore the key for solving the problems is to keep the air passage smooth and stop bleeding quickly. In the prior art, the blocking saccule designed by part of the prior art enters a specific hemostasis position for blocking through a bronchoscope working channel, but because only one bronchoscope channel is provided, the blocking saccule cannot be used locally for other hemostasis medicines and the like after being occupied, and cannot be used for other treatments through a bronchoscope.

In order to solve the above technical problems, it is necessary to develop a blocking balloon catheter sleeved on a bronchoscope.

SUMMERY OF THE UTILITY MODEL

In order to solve clinically when the bronchus is hemorrhage in the relevant operation process of bronchus, keep the technical problem that the air flue is unobstructed and stanch fast, the utility model provides a do not occupy the bronchoscope passageway to can realize from the overcoat of aerifing/liquid in the shutoff sacculus pipe of bronchoscope.

An occlusion balloon catheter externally sleeved on a bronchoscope comprises a balloon main body, a catheter and an inflation/liquid part; wherein the balloon main body comprises a hollow tubular structure and a balloon wrapped on the outer surface of the hollow tubular structure, a first end of a catheter is communicated with the balloon, a second end of the catheter is connected with the inflation/liquid component, and the inflation/liquid component inflates/liquid into the balloon through the catheter; wherein a hanger is disposed on the outer wall near the second end of the conduit; a switch assembly is arranged on the inflation/liquid part, and the inflation/liquid part can automatically fill gas or liquid into the capsule by opening the switch assembly; in an uninflated/liquid state, the balloon is affixed to the hollow tubular structure, and in an inflated/liquid state, the balloon bulges forming a balloon around the hollow tubular structure.

The hollow tubular structure in the balloon main body of the utility model is sleeved at the tip part of the bronchoscope, when the bronchoscope is adopted to carry out a series of operations, the balloon body is in an uninflated or liquid-filled state, thereby not influencing the use of the bronchoscope; when the bleeding needs to be blocked, the inflating/liquid part inflates/fills the air into the bag body, so that the blocking is realized; the bronchoscope plugging balloon is simple in structure and convenient to operate, the balloon body can be inflated to realize plugging only by opening the switch assembly when the bronchoscope plugging balloon is used, and operation by a separate person is not needed; the setting of flying piece is convenient for placing and accomodating of bronchoscope shutoff sacculus.

Further, wherein in the uninflated/liquid state of the balloon, the length of the balloon along the axial direction of the hollow tubular structure is 1.5cm-2 cm.

Further wherein the distance between the two points of the balloon which are farthest away is 1.5cm-2.5cm on a plane which is vertical to the axial direction of the hollow tubular structure in the inflation/liquid filling state.

Further, the gas/liquid filling component is an automatic injector, the automatic injector comprises an injection tube, a piston rod and a spring, a first end of the piston rod extends into the injection tube, the piston rod moves in the injection tube in a reciprocating manner, and a second end of the piston rod extends to the outer side of the injection tube; a connecting plate is arranged on the inner wall of the injection tube, the spring is sleeved outside the piston rod, the first end of the spring is connected to the connecting plate, and the second end of the spring is connected to the second end of the piston rod; when the injection tube is in an emptying state, the spring is in a natural state, and when the injection tube is in an air suction state or a liquid suction state, the spring is in a stretching state. In the arrangement, the inflation/liquid component is arranged as an automatic injector, the automatic inflation or liquid filling of the bag body is realized by utilizing the force exerted by the return of the spring, the structure is simple, and the production and the use are convenient; since the device is small, the operation can be performed at any location.

Further, the connecting plate is arranged around the piston rod along the circumferential direction of the inner wall of the syringe, the first end of the spring is arranged on the connecting plate and can rotate around the piston rod along the circumferential direction of the piston rod, and the first end of the spring and the connecting plate are relatively fixed along the axial direction of the piston rod.

Further, the switch assembly is used for limiting the position of the piston rod in the syringe barrel. In such an arrangement, the state of the capsule is changed by limiting the position of the plunger rod in the syringe.

Furthermore, the switch assembly comprises a stop block arranged on the inner wall of the injection cylinder and a clamping plate arranged on the piston rod, the stop block is positioned between the connecting plate and the first end of the piston rod, and the clamping plate extends outwards along the circumferential direction of the piston rod on the outer surface of the piston rod; after the injection tube finishes the suction or liquid suction state, one side of the clamping plate close to the first end of the piston rod is abutted to the stop block by rotating the piston rod, and the piston rod is prevented from moving under the action of the elastic force of the spring. The switch assembly is specifically arranged in the arrangement, and the limit of the piston rod is realized through the combination of the stop block and the clamping plate, so that the switch function is realized.

Further, the cardboard includes a plurality of fin boards, the fin board by the piston rod outer wall towards the syringe barrel inner wall direction extends, the dog sets up between two adjacent fin boards.

Furthermore, the plurality of fin plates are uniformly arranged on the outer wall of the piston rod, the cross section of the stop block is opposite to that of a space between two adjacent fin plates, and the piston rod can only axially move relative to the injection cylinder in the air suction/liquid discharge process and the air discharge/liquid discharge process of the automatic injector.

Further, the second end of the conduit is connected with the inflation/liquid component through a luer joint or through a thread connection.

Furthermore, the balloon main body further comprises a cover plate arranged at one end of the hollow tubular structure far away from the catheter, a plurality of through holes are formed in the cover plate, and the size and the number of the through holes correspond to the structure of the tip part of the bronchoscope. In the arrangement, the cover plate can protect the tip of the bronchoscope, and the cover plate can prevent the balloon body from displacing along the bronchoscope when the bronchoscope is operated; wherein the arrangement of the through hole is such that the structure does not affect the normal function in the bronchoscope.

Further, the size of the cover plate corresponds to the size of the tip of the existing bronchoscope of various types. For example, a variety of cover plate sizes may be designed to allow for application to a variety of different bronchoscopes.

Further, the cover plate and the hollow tubular structure are arranged integrally. In this kind of setting, apron and hollow tubular structure adopt the integral type setting, are favorable to the overall stability of this structure, avoid the risk that the part dropped and leads to.

Furthermore, the balloon main body is made of elastic materials. In this arrangement, the balloon body is made of an elastic material, and thus can be fixed to the distal end portion of the bronchoscope by the elasticity thereof, thereby improving the stability of the entire structure.

The utility model provides a shutoff sacculus pipe externally sleeved on a bronchoscope, wherein a hollow tubular structure in a sacculus main body is sleeved at the tip part of the bronchoscope, and when the bronchoscope is adopted for a series of operations, a sac body in the shutoff sacculus pipe is in an uninflated or liquid-filled state, so that the use of the bronchoscope is not influenced; when the bleeding needs to be blocked, the inflating/liquid part inflates/fills the air into the bag body, so that the blocking is realized; the blocking balloon catheter externally sleeved on the bronchoscope has a simple structure and convenient operation, and when the blocking balloon catheter is used, the balloon body can be filled to block only by opening the switch assembly without operation by a separate person; the suspension piece is arranged to facilitate the placement and the storage of the bronchoscope plugging balloon; through designing the switch assembly therein for this shutoff sacculus simple structure, convenient operation.

Drawings

Fig. 1 is a schematic view of the overall structure of an occlusion balloon catheter sheathed on a bronchoscope according to an embodiment of the present invention (balloon is not inflated/liquid);

FIG. 2 is an enlarged partial schematic view of FIG. 1 at the body of the balloon (balloon not inflated/liquid);

fig. 3 is a schematic overall structure diagram (balloon inflation/fluid) of an occlusion balloon catheter sleeved on a bronchoscope according to an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3 at the balloon body (balloon inflation/fluid);

fig. 5 is a front perspective view of an automatic injector mounted on a blocking balloon catheter of a bronchoscope in three different states according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of an automatic injector sleeved in a blocking balloon catheter of a bronchoscope according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of another angle of the automatic injector sleeved in the occlusion balloon catheter of the bronchoscope according to the embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of an injector cartridge of an auto-injector sheathed in a blocking balloon catheter of a bronchoscope according to an embodiment of the present invention;

FIG. 9 is an enlarged partial view of FIG. 8 at the web;

fig. 10 is a schematic view of the entire structure of a piston rod of an automatic injector sleeved in an occlusion balloon catheter of a bronchoscope according to an embodiment of the present invention;

FIG. 11 is an enlarged fragmentary view of FIG. 10 at the second end of the piston rod;

fig. 12 is a front view of a spring of an automatic injector mounted on a blocking balloon catheter of a bronchoscope according to an embodiment of the present invention.

In the figure, 100, the balloon body; 110. a hollow tubular structure; 120. a capsule body; 130. a cover plate; 131. a through hole; 200. a conduit; 201. a first end of a conduit; 202. a conduit second end; 300. an auto-injector; 310. An injection tube; 311. a connecting plate; 312. a stopper; 313. an injection port; 314. spreading wings; 320. a piston rod; 321. a piston rod first end; 322. a piston rod second end; 323. a fin plate; 330. a spring; 331. a spring first end; 332. a spring second end.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and some structures are not shown in the drawings, which can be derived by those skilled in the art according to the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Embodiment is a plugging balloon catheter externally sleeved on a bronchoscope

Fig. 1 and 3 are schematic diagrams of the overall structure of an occlusion balloon catheter 200 externally sleeved on a bronchoscope in the embodiment, fig. 2 is a partially enlarged schematic diagram of fig. 1 at the balloon, and fig. 4 is a partially enlarged schematic diagram of fig. 2 at the balloon; as shown in fig. 1-4, the bronchoscope-sleeved occlusion balloon catheter 200 in this embodiment includes a balloon body 100, a catheter 200, and inflation/fluid components; wherein, the balloon body 100 comprises a hollow tubular structure 110 and a balloon 120 wrapped on the outer surface of the hollow tubular structure 110, the first end 201 of the catheter is communicated with the balloon 120, the second end 202 of the catheter is connected with an inflation/liquid component, and the inflation/liquid component inflates/liquid into the balloon 120 through the catheter 200; wherein the inflation/liquid part is provided with a switch assembly, and the inflation/liquid part can automatically inflate the capsule 120 with gas or liquid by turning on the switch assembly; as shown in fig. 1-2, in the uninflated/liquid state, the bladder 120 is affixed to the hollow tubular structure 110; as shown in fig. 3-4, in the inflated/liquid state, the balloon 120 bulges to form a balloon around the hollow tubular structure 110.

In some embodiments, a hanger (not shown) may also be provided on the outer wall near the second end 202 of the catheter. The hanging member may be a ring-shaped structure, such as a ring-shaped rope sleeve, an elastic ring, or other members that can function as a hanging member, and the hanging member is used to facilitate the storage of the whole occlusion balloon catheter 200, such as being hung at any convenient place.

When in use, the hollow tubular structure 110 in the balloon main body 100 is sleeved on the tip part of the bronchoscope, and when the bronchoscope is used for a series of operations, the balloon body 120 is in an uninflated or liquid-filled state, so that the use of the bronchoscope is not influenced; when the bleeding needs to be blocked, the switch assembly is turned on to inflate/inflate the balloon 120 with air/liquid, and the balloon structure formed by the balloon 120 is inflated to block the bleeding part; the bronchoscope plugging balloon in the embodiment is simple in structure and convenient to operate, the balloon body 120 can be filled to realize plugging only by opening the switch assembly when the bronchoscope plugging balloon is used, and operation by independent personnel is not needed.

The gas filled in the capsule body 120 in this embodiment may be air or nitrogen, and the liquid filled in the capsule body 120 may be sterile water or sterile physiological saline, etc.

The present embodiment also provides specific improvements in the specific dimensions of the balloon 120 therein, wherein the balloon 120 has a length in the axial direction of the hollow tubular structure 110 of 1.5cm-2cm in the uninflated/liquid state. In particular, the length of the balloon 120 along the axial direction of the hollow tubular structure 110 may be 1.5cm, 1.6cm, 1.7cm, 1.8cm, 1.9cm or 2 cm. Dimensions within this range may ensure that the balloon 120 has good applicability in bronchoscope usage scenarios.

Preferably, in the inflated/liquid filled state, the distance between the two farthest points of the balloon 120 in a plane perpendicular to the axial direction of the hollow tubular structure 110 is 1.5cm, 1.6cm, 1.7cm, 1.8cm, 1.9cm, 2.1cm, 2.2cm, 2.3cm, 2.4cm or 2.5 cm. Specifically, on a plane perpendicular to the axial direction of the hollow tubular structure 110, the distance between the two points farthest from the balloon 120 is a specific limitation on the circumferential dimension of the inflated/inflated balloon 120, so that the inflated/inflated balloon does not cause damage to the operation site in this range, and meanwhile, the plugging of the bleeding site can be well realized.

In this embodiment, the second end 202 of the conduit and the inflation/fluid component may be connected by a luer fitting or by threads. Specifically, the conduit second end 202 and the inflation/fluid component are removably sealed for ease of use and removal. Preferably, the conduit second end 202 may also be a sealed end that is open when the inflation/fluid components are attached to the conduit second end 202; when the inflation/fluid components are not connected, the sealing end provides a seal protection to the conduit 200 from foreign objects entering the conduit 200. Specifically, the sealing end may be an elastic sheet with slits disposed on the inner wall near the second end 202 of the conduit, wherein the elastic sheet closes the second end 202 of the conduit when the inflation/liquid part is not connected, and wherein the elastic sheet is pushed away when the inflation/liquid part is connected, thereby providing communication between the inflation/liquid part and the conduit 200.

As shown in fig. 2 and 4, the balloon body 100 of the present embodiment further includes a cover plate 130 disposed at one end of the hollow tubular structure 110 away from the catheter 200, the cover plate 130 is provided with a plurality of through holes 131, and the size and number of the plurality of through holes 131 correspond to the structure of the tip portion of the bronchoscope. In this arrangement, the cover plate 130 is arranged to protect the distal end of the bronchoscope, and the cover plate 130 is arranged to prevent the balloon body 100 from displacing along the bronchoscope during operation of the bronchoscope; wherein the through hole 131 is provided such that the structure does not affect the normal function of the bronchoscope. As shown in fig. 2 and 4, four through holes 131 are provided in the present embodiment, corresponding to the objective lens, the two photoconductive lenses, and the forceps channel exit, respectively.

Preferably, the size of the cover plate 130 corresponds to the size of the tip of each conventional bronchoscope. For example, a variety of cover plate 130 sizes may be designed to allow for application to a variety of different bronchoscopes.

Wherein the cover plate 130 is integrally or detachably arranged, preferably integrally, with the hollow tubular structure 110. The cover plate 130 and the hollow tubular structure 110 are integrally arranged, so that the overall stability of the structure is facilitated, and the risk caused by dropping of parts is avoided.

The balloon body 100 in this embodiment is made of an elastic material. For example, it can be made of medical silica gel or other medical elastic materials. The balloon body 100 is made of an elastic material, and thus can be fixed to the distal end portion of the bronchoscope by its elasticity, thereby improving the stability of the entire structure.

In this embodiment, the inflation/liquid component is specifically designed, in this embodiment, the automatic injector 300 is used as the inflation/liquid component, and fig. 5 is a perspective front view of the automatic injector 300 in this embodiment in three different states, which are an unused state, a full air/liquid state, and a state of completing automatic inflation/liquid in sequence from left to right. Fig. 6 and 7 are schematic cross-sectional views of the automatic injector 300 at different angles in the present embodiment; as shown in FIGS. 5-7, the automatic injector 300 of the present embodiment includes a barrel 310, a plunger rod 320 and a spring 330, the plunger rod first end 321 extends into the barrel 310, the plunger rod 320 reciprocates in the barrel 310, and the plunger rod second end 322 extends outside the barrel 310; a connecting plate 311 is arranged on the inner wall of the syringe 310, the spring 330 is sleeved outside the piston rod 320, a first end 331 of the spring is connected to the connecting plate 311, and a second end 332 of the spring is connected to the second end 322 of the piston rod; spring 330 is in a natural state when syringe barrel 310 is in an evacuated state and spring 330 is in a stretched state when syringe barrel 310 is in a suction or imbibed state. The automatic injector 300 in the embodiment uses the force exerted by the spring 330 to realize automatic inflation or liquid filling of the capsule 120, and has a simple structure and is convenient to produce and use; since the device is small, the operation can be performed at any location.

In this embodiment, the injection cylinder 310 is provided with an injection port 313 at a first end thereof, and wings 314 are provided on an outer wall of the injection cylinder 310 near a second end thereof, wherein the wings 314 are provided to perform suction/fluid operations.

Preferably, as shown in fig. 6-7, the connecting plate 311 is disposed around the piston rod 320 along the circumference of the inner wall of the barrel 310, the first end 331 of the spring is rotatable around the piston rod 320 along the circumference of the piston rod 320 on the connecting plate 311, and the first end 331 of the spring and the connecting plate 311 are fixed relative to each other along the axial direction of the piston rod 320. Further preferably, the connecting plate 311 and the wings 314 are located at the same position in the axial direction of the barrel 310, that is, the connecting plate 311 and the wings 314 are located at the same position on the barrel 310 and are respectively located on the inner wall of the barrel 310 and the outer wall of the barrel 310; such an arrangement facilitates manufacturing.

Auto-injector 300 begins auto-injection after the switch assembly in this embodiment is turned on, and specifically wherein the switch assembly is used to limit the position of plunger rod 320 within barrel 310. Changing the state of the balloon 120 by limiting the position of the piston rod 320 in the syringe 310 is simple and easy to implement.

Fig. 8 is a sectional view of a syringe barrel 310 in an automatic injector 300 according to the present embodiment, and fig. 9 is an enlarged view of a portion of fig. 8 at a connection plate 311; fig. 10 is a schematic view of the entire structure of the piston rod 320 in the automatic injector 300 according to the present embodiment; fig. 11 is an enlarged partial view of fig. 10 at the second end 322 of the piston rod.

The switch assembly in this embodiment is designed more specifically, the switch assembly includes a stopper 312 disposed on the inner wall of the syringe 310 and a catch plate disposed on the piston rod 320, the stopper 312 is located between the connecting plate 311 and the first end 321 of the piston rod, and the catch plate extends outward along the circumference of the piston rod 320 on the outer surface of the piston rod 320; after the syringe 310 is in the suction or liquid-absorbing state, the piston rod 320 is rotated to make the side of the catch plate close to the first end 321 of the piston rod abut against the stopper 312, so as to prevent the piston rod 320 from moving under the action of the elastic force of the spring 330. The piston rod 320 is limited by the combination of the stop block 312 and the clamping plate, so that the switch function is realized, and the structure is simple and convenient to operate, produce and manufacture.

As shown in fig. 6-11, the clamping plate of the present embodiment specifically includes a plurality of fins 323, the fins 323 extend from the outer wall of the piston rod 320 toward the inner wall of the syringe barrel 310, and the stopper 312 is disposed between two adjacent fins 323. It is further preferred that a plurality of fins 323 are uniformly disposed on the outer wall of the plunger rod 320, and the cross-sectional shape of the stopper 312 is opposite to the cross-sectional shape of the space between two adjacent fins 323, so that the plunger rod 320 can move only in the axial direction with respect to the syringe barrel 310 during the intake/discharge process and during the discharge/discharge process of the automatic injector 300. In this embodiment, three fins 323 are provided, but two, four, five, etc. fins may be provided.

Fig. 12 is a front view of the spring 330 in the automatic injector 300 of this embodiment, in which the first end 331 of the spring is provided with a first boss, the second end 332 of the spring is provided with a second boss, the second end 322 of the plunger rod is provided with a second groove, and the connecting plate 311 is provided with a first groove 315, wherein the first groove 315 and the second groove 324 are both disposed around the circumference of the plunger rod 320, the first boss is disposed corresponding to the first groove 315, and the second boss is disposed corresponding to the second groove 324; in use, the first boss can only circumferentially rotate around the plunger rod 320 in the first groove 315, the second boss can only circumferentially rotate around the plunger rod 320 in the second groove 324, but the first boss cannot be disengaged from the first groove 315, and the second boss cannot be disengaged from the second groove 324.

As shown in FIG. 5, in the three states, wherein the position of the plunger rod 320 within the barrel 310 is different, the state of the spring 330 is also different; firstly, in an unused state, the spring 330 is in a natural extension state, the first end 321 of the piston rod is positioned at the position closest to the injection port 313, and the injector is in an emptying state; then, when the injector is used, the injector is fully filled with gas or liquid, the injector is in a state of fully filling gas/liquid, the spring 330 is in a stretching state, and the switch assembly can be closed (the piston rod 320 is rotated to enable one side of the clamping plate close to the first end 321 of the piston rod to be abutted against the stop block 312, and the resistance of the stop block 312 to the clamping plate is balanced with the stretching retraction elasticity of the spring 330); when it is then necessary to inflate/inflate the capsule 120, the plunger rod 320 is rotated to disengage the catch plate from the catch 312, the plunger rod 320 is moved towards the injection port 313 by the retracting force of the spring 330, thereby compressing the gas or liquid in the syringe 310 and thus forcing the gas or liquid into the capsule 120, and the self-inflating/self-inflating state is completed when the retracting force of the spring 330 is balanced with the pressure of the gas or liquid in the capsule 120. Preferably, a mark can be arranged on the piston rod 320 to indicate that the balloon 120 is in a normal swelling state, and when the position of the piston rod 320 changes, the state of the balloon at the tip of the bronchoscope changes, so that a user can judge and monitor whether the balloon in the body is in a normal blocking state according to the specific position of the piston rod 320 outside the body, and the judgment method is simple, convenient and quick, and avoids the injury of the balloon to the wound of a patient and the mucous membrane in the body caused by repeatedly taking out and putting in the balloon.

The above description of the embodiments is only intended to illustrate the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several modifications can be made to the present invention, and these modifications will fall within the protection scope of the claims of the present invention.

Claims (10)

1. An occlusion balloon catheter externally sleeved on a bronchoscope is characterized by comprising a balloon main body, a catheter and an inflation/liquid part; wherein the balloon main body comprises a hollow tubular structure and a balloon wrapped on the outer surface of the hollow tubular structure, a first end of a catheter is communicated with the balloon, a second end of the catheter is connected with the inflation/liquid component, and the inflation/liquid component inflates/liquid into the balloon through the catheter; wherein a hanger is disposed on the outer wall near the second end of the conduit; a switch assembly is arranged on the inflation/liquid part, and the inflation/liquid part can automatically fill gas or liquid into the capsule by opening the switch assembly; in an uninflated/liquid state, the balloon is affixed to the hollow tubular structure, and in an inflated/liquid state, the balloon bulges forming a balloon around the hollow tubular structure.

2. The bronchoscope-sleeved occlusion balloon catheter of claim 1, wherein the inflation/fluid component is an auto-injector, the auto-injector comprises a syringe, a piston rod and a spring, a first end of the piston rod extends into the syringe, the piston rod reciprocates in the syringe, and a second end of the piston rod extends to the outside of the syringe; a connecting plate is arranged on the inner wall of the injection tube, the spring is sleeved outside the piston rod, the first end of the spring is connected to the connecting plate, and the second end of the spring is connected to the second end of the piston rod; when the injection tube is in an emptying state, the spring is in a natural state, and when the injection tube is in an air suction state or a liquid suction state, the spring is in a stretching state.

3. The bronchoscope-externally-sleeved occlusion balloon catheter as claimed in claim 2, wherein the connecting plate is disposed around the piston rod along a circumferential direction of the inner wall of the syringe barrel, the first end of the spring is rotatable around the piston rod along the circumferential direction of the piston rod on the connecting plate, and the first end of the spring and the connecting plate are relatively fixed along an axial direction of the piston rod.

4. The bronchoscope-sleeved occlusion balloon catheter of claim 3, wherein the switch assembly is configured to limit the position of the plunger rod within the barrel.

5. The bronchoscope-sleeved occlusion balloon catheter of claim 4, wherein the switch assembly comprises a stopper disposed on the inner wall of the syringe barrel and a catch plate disposed on the piston rod, the stopper being located between the connecting plate and the first end of the piston rod, the catch plate extending circumferentially outward on the outer surface of the piston rod along the piston rod; after the injection tube finishes the suction or liquid suction state, one side of the clamping plate close to the first end of the piston rod is abutted to the stop block by rotating the piston rod, and the piston rod is prevented from moving under the action of the elastic force of the spring.

6. The bronchoscope-externally-sleeved occlusion balloon catheter as claimed in claim 5, wherein the clamping plate comprises a plurality of fins extending from the outer wall of the piston rod towards the inner wall of the syringe barrel, and the stopper is disposed between two adjacent fins.

7. The bronchoscope-externally sleeved occlusion balloon catheter of claim 6, wherein the plurality of fins are uniformly arranged on the outer wall of the plunger rod, the cross-sectional shape of the stopper is opposite to the cross-sectional shape of the space between two adjacent fins, and the plunger rod can only move axially relative to the syringe barrel during the aspiration/fluid process and the discharge/fluid process of the automatic injector.

8. The bronchoscope sleeved occlusion balloon catheter of any one of claims 1-7, wherein the second end of the catheter is connected to the inflation/fluid component by a luer fitting or by a threaded connection.

9. The bronchoscope-sheathing occlusion balloon catheter according to any one of claims 1 to 7, wherein the balloon body further comprises a cover plate disposed at an end of the hollow tubular structure remote from the catheter, the cover plate being provided with a plurality of through holes, the size and number of the through holes corresponding to the structure of the bronchoscope tip.

10. The bronchoscope-externally-sleeved occlusion balloon catheter of claim 9, wherein the cover plate is integral with the hollow tubular structure.

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