CN110840536A - Disposable cervical dilatation sacculus pipe - Google Patents

Abstract

The present invention provides a disposable cervical dilatation balloon catheter, comprising a pressurizing component and a dilatation balloon connected to each other. When dilatation of the cervix is performed, the hose component is guided by the guide wire to follow the connecting component, the filling head and the dilatation component into the vagina, the pressurizing component fills the dilatation balloon with gas or liquid, the gas or liquid enters the dilatation component through the guide channel, the connecting channel and the filling medium channel in turn, the dilatation component expands outward to achieve dilatation of the cervix, thereby slowly expanding the cervix to a size that ensures smooth operation, relieves the patient's pain, reduces damage to the cervical mucosa, and ensures safe and smooth dilatation of the cervix; when dilatation of the cervix is completed, the guide wire is pulled out, the silicone plug is sealed by itself under the elastic restoring force of the silicone adapter and the silicone plug, and the dilatation balloon is retained in the vagina by folding the silicone extrusion tube.

Description

A Disposable Cervical Dilation Balloon Catheter

technical field

The invention relates to the technical field of medical devices, in particular to a disposable cervical dilation balloon catheter.

Background technique

When doing family planning surgery, gynecological examination or surgery of vaginal uterus and accessories, in order to better adapt to the needs of surgery, it is necessary to dilate the cervical canal. At present, the method for dilating the cervical canal in the prior art is as follows: using metal or plastic dilating rods with different diameters, inserting and pulling out the cervix in order from small to large, and dilating the cervix hard to achieve the size of the cervix in the operation, The doctor's operation is very cumbersome, and may cause damage to the cervical mucosa; or use certain materials to expand the uterus, and expand the cervical canal through the moistening of the cervical mucus to achieve the purpose of expanding the cervical canal. This method is related to the secretion of the cervix, and the dilation effect is often No, it is not conducive to the safe and smooth progress of the surgical process. In addition, the instruments used in the existing methods of dilating the cervical canal with metal or plastic dilating rods cannot be indwelled in the vagina.

SUMMARY OF THE INVENTION

Based on this, the purpose of the present invention is to provide a one-time cervical dilation balloon catheter, which is easy to operate, and can slowly expand the cervix to a size that ensures the smooth operation of the operation, relieve the pain of the patient, and reduce the damage to the cervical mucosa. In order to ensure the safe and smooth progress of the dilation process, it can also be indwelled in the vagina.

A disposable cervical dilation balloon catheter, comprising a connected pressure component and a dilation balloon, the expansion balloon includes a guide wire connected with the pressure component, and a flexible tube component connected with the guide wire, A connecting assembly connected to the hose assembly, an expansion assembly disposed in the connecting assembly, and a fill having one end disposed in the connecting assembly and the other end passing through the expansion assembly and extending the length of the expansion assembly head, the end of the filling head facing the guide wire is provided with a filling medium channel;

The end of the guide wire penetrates the hose assembly and abuts against the connecting assembly, and a guide channel is provided in the guide wire;

The connection assembly is provided with a connection channel, and the connection channel communicates with the guide channel and the medium-filling channel,

The hose assembly includes a silicone adapter, one end of the silicone adapter is internally embedded with a silicone plug, the other end is connected to a silicone extrusion tube, and the other end of the silicone extrusion tube is clamped with the connection component , when the cervical dilation is completed, pull out the guide wire, under the elastic restoring force of the silicone adapter and the silicone plug, the silicone plug seals itself, and the expansion ball is folded by folding the silicone extrusion tube. The sac is left in place.

Compared with the prior art, in the disposable cervical dilation balloon catheter of the present invention, when cervical dilation is performed, the flexible tube assembly follows the connecting assembly, filling head and dilation through the guiding action of the guide wire. The component enters the vagina, the pressurizing component fills the expansion balloon with gas or liquid, and the gas or liquid enters the expansion component through the guide channel, the connection channel and the filling medium channel in turn, and the expansion component enters the expansion component. External expansion to realize the expansion of the cervix, so as to slowly expand the cervix to a size that ensures the smooth operation of the cervix at one time, reduce the pain of the patient, reduce the damage to the cervical mucosa, and ensure the safe and smooth progress of the uterine expansion process; when the cervix is dilated At the end, pull out the guide wire, under the elastic restoring force of the silicone adapter and the silicone plug, the silicone plug seals itself, and the expansion balloon is indwelled by folding the silicone extrusion tube. inside the vagina.

Further, the silica gel plug includes a connected plug head and a plug rod embedded in the silica gel adapter, and the end surface of the plug head is provided with a guide hole extending toward the plug rod. The end of the guide wire enters the guide hole and penetrates the plug to enter the silicone extrusion tube.

Further, a plurality of reinforcing ribs are arranged on the outer wall of the plug rod, and the ends are arc-shaped.

Further, the silica gel adapter includes a first adapter and a second adapter connected to each other, the first adapter is provided with a first adapter hole, and the second adapter is provided with a second adapter. access holes, where,

the first transfer hole clamps the plug rod, and the first transfer hole and the plug rod are in an interference fit;

The second adapter is connected with the silicone extrusion pipe, and the second adapter hole is communicated with the silicone extrusion pipe.

Further, the connecting assembly includes a connecting cap, a connecting rod, and a connecting screw connecting the connecting cap and the connecting rod, the connecting screw is in a hollow structure, and one end of the silicone extrusion tube is clamped in the connecting cap. , and the other end clamps the common end of the expansion assembly and the filling head in the connecting rod;

The connection cap is provided with a cap channel, the connection screw is provided with a screw channel, and the screw channel and the cap channel communicate with each other to form the connection channel.

Further, the connection screw includes a clamping end and a threaded end, and the threaded end is respectively threadedly connected with the connection cap and the connection rod, wherein,

A clamping groove is formed between the clamping end and the threaded end, and one end of the silicone extrusion tube is clamped between the connecting cap, the clamping end and the clamping groove;

An end surface of the threaded end is concave to form a receiving groove, and one end of the filling head facing the silicone extrusion tube is received in the receiving groove;

The screw channel penetrates from the end face of the clamping end to the bottom of the receiving groove.

Further, the expansion assembly includes a buckle, a silicone sleeve with a closed end sleeved on the buckle, and the end of the silicone sleeve protrudes from the connecting rod in a direction away from the silicone extrusion tube, The buckle fixes the head end of the silicone sleeve inside the connecting rod, and the end of the filling head facing away from the silicone extrusion tube passes through the buckle and extends the end of the silicone sleeve , the inner cavity of the silicone sleeve is communicated with the filling medium channel, when the cervix is dilated, the pressurizing component is filled with gas or liquid into the expansion balloon, and the gas or liquid passes through the catheter and the filling medium channel in turn. Entering into the inner cavity of the silicone sleeve, the silicone sleeve expands outward to realize the expansion of the cervix.

Further, the head end of the silica gel sleeve forms a silica gel fitting portion, and the end is arc-shaped and the outer diameter gradually decreases;

The thickness of the tube wall of the silicone sleeve gradually decreases from the head end to the end, and the overall thickness differs by 0.1 mm.

Further, the end of the filling head is covered with a silicone cap, and the end of the silicone cap is pressed against the end of the silicone sleeve.

Further, the guide wire includes a luer connector and a stainless steel hollow tube connected to each other, a guide hole is provided in the luer connector, and the guide hole communicates with the stainless steel hollow tube to form the guide channel.

Description of drawings

1 is a schematic structural diagram of a disposable cervical dilation balloon catheter in an embodiment of the present invention;

Figure 2 is an exploded view of the structure of the disposable cervical dilation balloon catheter in Figure 1;

Figure 3 is a cross-sectional view of the silicone plug in Figure 1 before the guide wire penetrates;

FIG. 4 is an assembled and disassembled cross-sectional view of the connecting assembly in FIG. 1;

Figure 5 is a cross-sectional view of the filling head in Figure 1;

FIG. 6 is a cross-sectional view of the silicone sleeve in FIG. 1 .

Description of main component symbols:

dilation balloon 100 guide wire 10 luer connector 101 Stainless Steel Hollow Tube 102 Hose Assembly 11 Silicone adapter 111 first adapter 1111 second adapter 1112 Silicone stopper 112 plug 1121 plunger 1122 pilot hole 1123 stiffener 1124 Silicone Extrusion Tube 113 Connection components 12 connection channel 121 connecting cap 122 cap channel 1221 Connecting rod 123 connecting screw 124 screw channel 1241 snap terminal 1242 threaded end 1243 card slot 1244 storage tank 1245 expansion kit 13 snap 131 Silicone Case 132 Silicone fitting 1321 filling head 14 medium filling channel 141 Silicone cap 15

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Several embodiments of the invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, 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 terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 and FIG. 2 , a disposable cervical dilation balloon catheter provided in an embodiment of the present invention includes a connected pressure component and a dilation balloon 100, and the dilation balloon 100 includes a A guide wire 10 connected to the pressure assembly, a hose assembly 11 connected to the guide wire 10, a connecting assembly 12 connected to the hose assembly 11, an expansion assembly 13 disposed in the connecting assembly 12, and a In the connecting assembly 12, the other end of the filling head 14 passes through the expansion assembly 13 and extends the length of the expansion assembly 13. The filling head 14 is provided with a filling medium channel 141 at one end of the filling head 14 facing the guide wire 10. ;

The end of the guide wire 10 penetrates through the hose assembly 11 and abuts against the connecting assembly 12, and a guide channel is provided in the guide wire 10;

The connecting assembly 12 is provided with a connecting channel 121 , and the connecting channel 121 communicates with the conducting channel and the medium-filling channel 141 .

It should be noted that, in the present invention, when cervical dilation is performed, the hose assembly 11 is followed by the connecting assembly 12, the filling head 14 and the dilation assembly 13 into the vagina through the guiding action of the guide wire 10, The pressurizing component fills the expansion balloon 100 with gas or liquid, and the gas or liquid enters the expansion component 13 through the guide channel, the connection channel 121 and the filling medium channel 141 in sequence, and the expansion component 13 External expansion to achieve the expansion of the cervix, so as to slowly expand the cervix to a size that ensures the smooth operation of the operation, reduce the pain of the patient, reduce the damage to the cervical mucosa, and ensure the safe and smooth progress of the uterine expansion process.

Please refer to FIG. 2 , the hose assembly 11 includes a silicone adapter 111 , one end of the silicone adapter 111 is embedded with a silicone plug 112 , and the other end is connected to a silicone extrusion tube 113 , the silicone extrusion tube The other end of 113 is clamped with the connecting component 12. When the cervical dilation is completed, the guide wire 10 is pulled out. Under the elastic restoring force of the silicone adapter 111 and the silicone plug 112, the silicone plug 112 Self-sealing, the dilation balloon 100 is indwelled by folding the silicone extrusion tube 113 .

It should be clear that, in this embodiment, since the silicone extrusion tube 113 is made of silicone material, it has elasticity and can be folded. Further, the silica gel adapter 111 and the silica gel extrusion tube 113 may be integrally formed or connected by bonding.

Please refer to FIG. 3 , the silicone plug 112 includes a connected plug head 1121 and a plug rod 1122 embedded in the silicone adapter 111 . Guide hole 1123 , before use, the end of the guide wire 10 enters the guide hole 1123 and penetrates the plug 1122 and enters the silicone extrusion tube 113 .

Specifically, in this embodiment, the function of the guide hole 1123 is to guide, so as to facilitate the insertion of the guide wire 10 or the liquid guide to penetrate the plug rod 1122 , and to pass through the plug rod 1122 from the other end of the plug rod 1122 pierced through the middle.

The plug rod 1122 is a solid body before being penetrated, and mainly plays a sealing role. When in use, the guide wire 10 penetrates the plug rod 1122 after being inserted into the guide hole 1123, and is implemented through the guide wire 10. The inflation member 13 is inflated by the inflation body or liquid pressurization. When the cervical dilation is completed, the guide wire 10 is pulled out, and under the elastic restoring force of the silicone adaptor 111 and the silicone plug 112, the plug 1122 returns to its original state and performs self-sealing to prevent gas or liquid (physiological Saline) flows out, and after the clinical effect is achieved, the catheter is inserted to release the pressure, and the gas or liquid in the expansion assembly 13 is discharged.

In another preferred embodiment of the present invention, a plurality of reinforcing ribs 1124 are provided on the outer wall of the plug rod 1122, and the reinforcing ribs 1124 make the connection between the plug rod 1122 and the silicone adapter 111 more tightly, and The end is arc-shaped, which can increase the contact area between the plug 1122 and the silicone adapter 111 and enhance the sealing effect.

Please refer to FIG. 2 , the silicone adapter 111 includes a first adapter 1111 and a second adapter 1112 connected to each other, the first adapter 1111 is provided with a first adapter hole, and the second adapter A second adapter hole is provided in 1112 .

Specifically, the first adapter hole clamps the plug rod 1122, and the first adapter hole and the plug rod 1122 are in an interference fit, that is, the inner diameter of the first adapter hole is smaller than The outer diameter of the plug rod 1122, so that after the guide wire 10 is pulled out, the first adapter 1111 will tighten and clamp the plug rod 1122, so that the plug rod 1122 is self-sealing .

Further, the second adapter 1112 is connected to the silicone extrusion tube 113, and the second adapter hole communicates with the silicone extrusion tube 113, so that the guide wire 10 can enter the silicone extrusion tube 113. out of pipe 113.

2 and 4 , the connecting assembly 12 includes a connecting cap 122, a connecting rod 123, and a connecting screw 124 connecting the connecting cap 1221 and the connecting rod 123. The connecting screw 124 has a hollow structure, and one end connects the The silicone extrusion tube 113 is stuck in the connecting cap 122, and the other end is stuck in the connecting rod 123 with the common end of the expansion assembly 13 and the filling head 14;

The connecting cap 122 is provided with a cap channel 1221, and the connecting screw 124 is provided with a screw channel 1241. The screw channel 1241 and the cap channel 1221 communicate with each other to form the connecting channel 121, so that gas or liquid can enter the charging chamber. in the medium channel 141 .

Further, the connecting screw 124 includes a clamping end 1242 and a threaded end 1243, and the threaded end 1243 is respectively threadedly connected with the connecting cap 122 and the connecting rod 123, so that the structure of the connecting assembly 12 is simplified and easy to assemble ,in,

A slot 1244 is formed between the clip end 1242 and the threaded end 1243 , and one end of the silicone extrusion tube 113 is clipped between the connection cap 122 , the clip end 1242 and the slot 1244 . Describe the sealing between the silicone extrusion tube 113 and the connecting assembly 12;

A receiving groove 1245 is formed concavely on the end surface of the threaded end 1243 , and the end of the filling head 14 facing the silicone extrusion tube 113 is received in the receiving groove 1245 , so that the connection between the filling head 14 and the filling head 14 can be realized. sealing between components 12;

The screw channel 1241 penetrates from the end face of the clip end 1242 to the bottom of the receiving slot 1245 , so as to facilitate the communication between the screw channel 1214 and the medium-filling channel 141 .

Referring to FIGS. 2 and 5 , the function of the filling medium channel 141 is to facilitate the entry of liquid or gas into the expansion assembly 13 through the filling head 14 . When performing cervical dilation, the pressure component fills the expansion balloon 100 with gas or liquid, and the gas or liquid enters the expansion component 13 through the guide channel, the connection channel 121 and the filling medium channel 141 in sequence, so The dilation component 13 is expanded externally to achieve dilation of the cervix.

Further, the length of the filling head 14 ranges from 20 mm to 80 mm. In order to achieve the extension of the expansion assembly 13 , the length of the filling head 14 is greater than the length of the expansion assembly 13 .

Please refer to FIG. 2 and FIG. 6 , the expansion assembly 13 includes a buckle 131 , a silicone sleeve 132 sleeved on the buckle 131 and closed at the end, the end of the silicone sleeve 132 is extruded along the back of the silicone The direction of the tube 113 protrudes from the connecting rod 123 , the buckle 131 fixes the head end of the silicone sleeve 132 inside the connecting rod 123 , and the filling head 14 faces away from the silicone extrusion tube 113 One end of the silicone sleeve 132 passes through the buckle 131 and the end of the silicone sleeve 132 is extended. The inner cavity of the silicone sleeve 132 is communicated with the medium filling channel 141. When the cervix is dilated, the pressure component is directed to the The dilation balloon 100 is filled with gas or liquid, and the gas or liquid enters the inner cavity of the silicone sleeve 132 through the guide channel, the connecting channel 121 and the filling medium channel 141 in turn, and the silicone sleeve 132 is expanded to achieve the expansion of the cervix. expansion.

Referring to FIG. 6 , a silicone fitting portion 1321 is formed at the head end of the silicone sleeve 132 , and the end is arc-shaped and has a gradually decreasing outer diameter. On the one hand, the silicone fitting portion 1321 facilitates the buckle 131 The silicone sleeve 132 is fixed, on the other hand, it can enhance the sealing performance. The arc shape can reduce the damage to the cervix during the operation, and the outer diameter gradually decreases so that the size of the silicone sleeve 132 entering the cervix gradually increases, which is convenient for the cervical Adapt to the insertion of the silicone sleeve 132 .

In another preferred embodiment of the present invention, the thickness of the tube wall of the silicone sleeve 132 gradually decreases from the head end to the end, and the overall thickness differs by 0.1 mm. The purpose of this setting is to make the tube wall thickness during cervical dilation The thinner ends are expanded first.

Specifically, in this embodiment, the length of the silicone sleeve 132 ranges from 20 mm to 70 mm. On the one hand, during the assembly process, the length of the silicone sleeve 132 is extended by the filling head 14 , that is, the length of the silicone sleeve 132 is stretched. The length of the silicone sleeve 132 can reduce the outer diameter of the silicone sleeve 132, that is, the size of the first entry into the cervix can be reduced. On the other hand, the balloon can be inflated during the expansion process by stretching the silicone sleeve 132. evenly.

Preferably, the length of the silicone sleeve 132 is smaller than the length of the filling head 14 , in order to extend the length of the silicone sleeve 132 through the filling head 14 . When the length of the silicone sleeve 132 is less than 20 mm, the strength of the silicone sleeve 132 increases after being stretched by the filling head 14 and cannot meet the requirements for use; when the length of the silicone sleeve 132 is greater than 70 mm, the The length of the silicone sleeve 132 is close to the length of the filling head 14, and the effect of stretching cannot be achieved, that is, the outer diameter of the silicone sleeve 132 will not change basically. In addition, the material used for the silicone sleeve 132 is increased. ,increase cost.

Please refer to FIG. 2 , the end of the filling head 14 is covered with a silicone cap 15 , and the end of the silicone cap 15 is pressed against the end of the silicone sleeve 132 . On the one hand, the structure of the end of the silicone sleeve 132 can be simplified, and the other is On the one hand, direct contact between the end of the filling head 14 and the end of the silicone sleeve 132 can be avoided, so as to ensure the service life of the silicone sleeve 132 .

Please refer to FIG. 2 again, the guide wire 10 includes a luer connector 101 and a stainless steel hollow tube 102 connected to each other, the luer connector 101 is provided with a guide hole, and the guide hole communicates with the stainless steel hollow tube 102 to form the guide channel. When the disposable cervical dilation balloon catheter is inserted into the vagina, the guide wire 10 plays a supporting and guiding role. When performing cervical dilation, the guide channel communicates with the connecting channel 121 and the filling medium channel 141, which is convenient for gas or liquid to flow. pass.

It should be noted that, in this embodiment, the pressurizing assembly includes a hose, a joint and an inflator sequentially connected to the hose assembly 11 , the joint is provided with a one-way valve, and the outer wall is connected with a pressure surface. The expansion assembly is filled with gas or liquid through the inflator, and the filling amount of the gas or liquid is monitored through the pressure gauge.

Specifically, in this embodiment, the inflator is a syringe, the gas is air, and the liquid is distilled water, purified water or physiological saline.

In the process of using the present invention, the inflator first sucks gas or liquid into the inflator, and then connects with the joint, and the inflator sequentially passes the gas or liquid through the guide channel in the guide wire 10 and the connecting component. The connecting channel 121 in 12 and the filling medium channel 141 in the filling head 14 are slowly injected into the silicone sleeve 132, and the silicone sleeve 132 expands outward to realize the expansion of the cervix, thereby slowly expanding the cervix at one time. At the same time, the pressure of the gas or liquid inside is monitored in real time by the pressure gauge, so as to avoid the pressure is too small, the cervical dilatation is not in place, or the pressure change is too large, so that the outer surface of the silicone sleeve 132 is avoided. Diameter changes are too large, resulting in damage to the cervical mucosa.

To sum up, in the disposable cervical dilation balloon catheter of the present invention, when cervical dilation is performed, the hose assembly 11 is followed by the connecting assembly 12, the filling head 14 and the The expansion component 13 enters the vagina, the pressurizing component fills the expansion balloon 100 with gas or liquid, and the gas or liquid enters the silicone sleeve 132 through the guide channel, the connection channel 121 and the filling medium channel 141 in sequence. , the silicone sleeve 132 expands externally to realize the expansion of the cervix, so as to slowly expand the cervix to a size that ensures the smooth operation of the operation at one time, relieve the pain of the patient, reduce the damage to the cervical mucosa, and ensure the safety of the expansion process. When the cervical dilation ends, pull out the guide wire 10, under the elastic restoring force of the silicone adapter 111 and the silicone plug 112, the silicone plug 112 seals itself, and the silicone is folded to extrude The tube 113 indwells the dilation balloon 100 in the vagina.

The above-mentioned embodiments only represent some embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention, and the various embodiments proposed in the present application are mutually exclusive. can be combined together. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

1. A disposable cervical dilation balloon catheter, comprising a connected compression assembly and an expansion balloon, characterized in that: the expansion balloon comprises a guide wire connected with the compression assembly, and the guide wire is connected with the guide wire. A connected hose assembly, a connecting assembly connected to the hose assembly, an expansion assembly disposed in the connecting assembly, and one end disposed in the connecting assembly, the other end passing through the expansion assembly and extending the a filling head of the length of the expansion assembly, the end of the filling head facing the guide wire is provided with a filling medium channel; The end of the guide wire penetrates the hose assembly and abuts against the connecting assembly, and a guide channel is provided in the guide wire; The connection assembly is provided with a connection channel, and the connection channel communicates with the guide channel and the medium-filling channel, The hose assembly includes a silicone adapter, one end of the silicone adapter is internally embedded with a silicone plug, the other end is connected to a silicone extrusion tube, and the other end of the silicone extrusion tube is clamped with the connection component , when the cervical dilation is completed, pull out the guide wire, under the elastic restoring force of the silicone adapter and the silicone plug, the silicone plug seals itself, and the expansion ball is folded by folding the silicone extrusion tube. The sac is left in place. 2. The disposable cervical dilation balloon catheter according to claim 1, wherein the silica gel plug comprises a connected plug head and a plug plunger embedded in the silica gel adapter, and the end face of the plug head is There is a guide hole extending toward the plug rod, and before use, the end of the guide wire enters the guide hole and penetrates the plug rod and enters the silicone extrusion tube. 3 . The disposable cervical dilation balloon catheter according to claim 2 , wherein a plurality of reinforcing ribs are arranged on the outer wall of the plug, and the ends are arc-shaped. 4 . 4. The disposable cervical dilation balloon catheter according to claim 2, wherein the silicone adapter comprises a first adapter and a second adapter that are connected to each other, and the first adapter is provided with a first adapter hole, the second adapter is provided with a second adapter hole, wherein, the first transfer hole clamps the plug rod, and the first transfer hole and the plug rod are in an interference fit; The second adapter is connected with the silicone extrusion pipe, and the second adapter hole is communicated with the silicone extrusion pipe. 5. The disposable cervical dilation balloon catheter according to claim 2, wherein the connecting component comprises a connecting cap, a connecting rod, and a connecting screw connecting the connecting cap and the connecting rod, and the connecting screw is in the form of a connecting cap. A hollow structure, one end of which clamps the silicone extrusion tube in the connecting cap, and the other end that clamps the common end of the expansion assembly and the filling head in the connecting rod; The connection cap is provided with a cap channel, the connection screw is provided with a screw channel, and the screw channel and the cap channel communicate with each other to form the connection channel. 6 . The disposable cervical dilation balloon catheter according to claim 5 , wherein the connecting screw comprises a clamping end and a threaded end, and the threaded end is respectively threadedly connected with the connecting cap and the connecting rod, wherein , A clamping groove is formed between the clamping end and the threaded end, and one end of the silicone extrusion tube is clamped between the connecting cap, the clamping end and the clamping groove; An end surface of the threaded end is concave to form a receiving groove, and one end of the filling head facing the silicone extrusion tube is received in the receiving groove; The screw channel penetrates from the end face of the clamping end to the bottom of the receiving groove. 7 . The disposable cervical dilation balloon catheter according to claim 6 , wherein the expansion assembly comprises a buckle, a silicone sleeve with a closed end sleeved on the buckle, and the end of the silicone sleeve is closed. 8 . Extend the connecting rod in the direction away from the silicone extrusion tube, the buckle fixes the head end of the silicone sleeve inside the connecting rod, and the filling head extrudes away from the silicone One end of the tube passes through the buckle and extends the end of the silicone sleeve, the inner cavity of the silicone sleeve is communicated with the filling medium channel, and when the cervix is dilated, the compression component is directed to the dilation ball. The bag is filled with gas or liquid, and the gas or liquid enters the inner cavity of the silicone sleeve through the catheter and the filling medium channel in turn, and the silicone sleeve expands outward to realize the expansion of the cervix. 8. The disposable cervical dilation balloon catheter according to claim 7, wherein the head end of the silicone sleeve forms a silicone fitting portion, and the end is arc-shaped and the outer diameter gradually decreases; The thickness of the tube wall of the silicone sleeve gradually decreases from the head end to the end, and the overall thickness differs by 0.1 mm. 9 . The disposable cervical dilation balloon catheter according to claim 7 , wherein the end of the filling head is covered with a silicone cap, and the end of the silicone cap is pressed against the end of the silicone sleeve. 10 . 10. The disposable cervical dilation balloon catheter according to any one of claims 1 to 9, wherein the guide wire comprises a connected luer joint and a stainless steel hollow tube, and the luer joint is provided with a hollow tube. A guide hole, the guide hole communicates with the stainless steel hollow tube to form the guide channel.

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