CN211273075U - cervical dilation device - Google Patents

Abstract

The utility model discloses a cervical dilation device, which comprises a catheter with a cavity, the outer wall of the catheter is sequentially provided with a first water bag, a second water bag and a third water bag, which are connected with the cavity and are annularly distributed from top to bottom. The water bag, the first water bag and the third water bag include a fiber layer and flexible layers located on both sides of the fiber layer, the rear end of the catheter is provided with a hose communicating with the cavity; Liquid injection part, the cross section of the accommodating cavity is circular, the hose communicates with the accommodating cavity, a piston is installed in the transparent liquid injection part, and the end of the piston away from the hose is installed with a connector with an external thread extending to the outside of the transparent liquid injection part The rod, one end of the transparent liquid injection member away from the hose is provided with a threaded hole that cooperates with the external thread; the other end of the connecting rod is provided with a handle part, and the handle part, the connecting rod and the piston are provided with sequential communication and leading to the accommodating cavity. In the water inlet channel, a detachable sealing plug for sealing the water inlet channel is installed on the handle part.

Description

cervical dilation device

technical field

The utility model relates to the field of medical instruments, in particular to a cervical dilation device.

Background technique

Preoperative cervical dilation is required for uterine cavity examinations or surgeries such as obstetrics and gynecology abortion, hysteroscopy and hysteroscopy. In particular, hysteroscopic surgery needs to dilate the cervix to different degrees according to the different needs of the operation. The current uterine expansion technique generally uses metal uterine expansion rods ranging in size from 4.0 to 10.5 to dilate the cervix. However, metal uterine expansion rods often cause difficulty in cervical dilation, which increases the operation time, infection, anesthesia and other related risks. It is also prone to complications such as uterine perforation, endometrial injury, cervical laceration, intrauterine adhesions, infertility, and bleeding. . For some high-risk patients, such as postmenopausal women, women with no history of pregnancy, infertility, and patients with a history of intrauterine adhesions and cervical adhesions, these risks are increased accordingly.

Utility model content

Aiming at the above-mentioned deficiencies in the prior art, the present invention aims to provide a cervical dilation device, which can improve the safety of surgery when applied.

In order to achieve the purpose of the above-mentioned invention and creation, the technical scheme adopted by the present utility model is:

A cervical dilation device is provided, which comprises a catheter with a cavity, the front end of the catheter is hemispherical, and the outer wall of the catheter is sequentially provided with a first water bladder and a second water bladder which are connected with the cavity and are distributed in an annular shape from top to bottom. and the third water bag, the first water bag and the third water bag include a fiber layer and a flexible layer located on both sides of the fiber layer, the material of the second water bag is a flexible material, and the rear end of the catheter is provided with a hose communicating with the cavity ;

The other end of the hose is installed with a transparent liquid injection piece with an accommodating cavity, the cross section of the accommodating cavity is circular, the hose is communicated with the accommodating cavity, a piston is installed in the transparent liquid injection piece, and the end of the piston away from the hose is installed with an extension to A connecting rod with an external thread outside the transparent liquid injection part, one end of the transparent liquid injection part away from the hose is provided with a threaded hole matched with the external thread; the other end of the connecting rod is provided with a handle part, a handle part, a connecting rod and a piston A water inlet channel which communicates sequentially and leads to the accommodating cavity is opened on the upper part, and a detachable sealing plug for sealing the water inlet channel is installed on the handle part;

Further, the material of the second water bag is silica gel.

Further, the material of the flexible layer is silica gel.

Further, the material of the catheter is silica gel.

Further, there are a plurality of first water injection ports between the second water bladder and the cavity, and all the first water injection ports are evenly distributed.

Further, the cavity section is circular.

Further, it also includes a support core, the cavity is provided with a guide channel with an opening and matched with the support core, the opening is located at the rear end of the catheter, there is a gap between the outer side wall of the guide channel and the inner side wall of the catheter, the hose is connected to the The cavity between the outer side wall of the guide channel and the inner side wall of the conduit communicates with the cavity.

Further, a liquid pressure sensor is installed on the hose.

The beneficial effects of the present utility model are:

The cervical dilation device utilizes the second water bladder to dilate the cervix, thereby greatly reducing tissue damage, reducing operation time, and avoiding uterine perforation, endometrial damage, and cervical Laceration, intrauterine adhesions, infertility, bleeding and other complications, thereby improving the safety of surgery.

When applying, first open the sealing plug, and then rotate the handle part to make the connecting rod screw back, and drive the piston back until the piston reaches the first set scale. Then hold the transparent liquid injection member vertically (the height of the transparent liquid injection member is greater than the height of the catheter), and use the water inlet channel to inject liquid into the accommodating cavity (the size of the water inlet channel at the sealing plug is larger than the size of the injection end of the injection container, That is, the water inlet channel is in communication with the atmosphere), until the liquid level reaches the piston, and the water inlet channel is also filled with liquid, and then the sealing plug is installed (there is almost no air in the entire cervical dilation device). During this process, since the height of the transparent liquid injection member is greater than the height of the catheter, and the water inlet channel is connected to the atmosphere, the injected part of the liquid will make the volumes of the first water bag, the second water bag and the third water bag become the natural state. maximum volume.

Then put down the transparent injection part so that its height is lower than the height of the catheter, and then continue to rotate the handle to make the piston continue to retreat to the second scale, so that the liquid in the cavity and all the water bladders will return under the action of negative pressure and gravity. into the receiving chamber. Then a part of the catheter is placed into the cervix of the patient, and the scale on the catheter is used to ensure that the first water bladder is located in the cervix, the second water bladder 3 is located at the cervix, and the third water bladder is located outside the cervix. Afterwards, the handle portion is reversely rotated, so that the piston advances to the third setting scale. At this time, the volume of the first water bag and the third water bag becomes the maximum volume under the action of liquid filling (to achieve the positioning of the catheter, to avoid the catheter continuing to advance to the uterus to damage the uterus, and to avoid the catheter from being separated from the patient), due to the first The first water bag and the third water bag include fibrous layers, and the maximum volume is equal to the maximum volume in their respective natural states; the second water bag is inflated to the first set volume under the action of liquid filling, so as to realize the preliminary expansion of the cervix . Afterwards, the medical staff can intermittently reversely twist the handle according to the specific conditions of the patient, so that the piston advances intermittently and finally locates at the fourth set scale (during this process, since the first water bladder and the third water bladder have reached the The maximum volume, the volume will not continue to change), so that the second balloon is intermittently inflated to the second set volume, thus avoiding the rapid expansion of the cervix, and based on the scale on the transparent injection part to achieve a more accurate cervical dilation.

Description of drawings

1 is a cross-sectional view of a cervical dilation device in a specific embodiment;

Fig. 2 is the sectional view of the catheter when the cervical dilation device in Fig. 1 is expanded;

3 is a cross-sectional view of a catheter in another embodiment;

Fig. 4 is the enlarged schematic diagram of A part in Fig. 3;

Figure 5 is a cross-sectional view of a catheter in another embodiment.

Among them, 1, hemispherical; 2, the first water bag; 3, the second water bag; 4, the third water bag; 5, the catheter; 6, the cavity; 7, the hose; 8, the transparent liquid injection part; 9 10, threaded hole; 11, connecting rod; 12, handle part; 13, sealing plug; 14, water inlet channel; 15, second water injection port; 16, arc surface; 17, guide channel; 18, opening.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of the present invention by those skilled in the art. But it should be clear that the embodiments described below are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art without any creative work without departing from the spirit and scope of the present invention defined and determined by the appended claims fall within the protection scope of the present invention.

As shown in FIG. 1 , the cervical dilation device includes a catheter 5 with a cavity 6, the front end of the catheter 5 is a hemispherical 1, and the outer wall of the catheter 5 is sequentially provided with a The first water bag 2, the second water bag 3 and the third water bag 4, the first water bag 2 and the third water bag 4 include a fiber layer and a flexible layer located on both sides of the fiber layer, and the material of the second water bag 3 is A flexible material, the rear end of the conduit 5 is provided with a hose 7 that communicates with the cavity 6 .

The other end of the hose 7 is installed with a transparent liquid injection member 8 with an accommodating cavity, the cross section of the accommodating cavity is circular, the hose 7 is communicated with the accommodating cavity, a piston 9 is installed in the transparent liquid injection member 8, and the piston 9 is far away from the hose One end of 7 is installed with a connecting rod 11 extending to the outside of the transparent liquid injection member 8 and having an external thread. One end of the transparent liquid injection member 8 away from the hose 7 is provided with a threaded hole 10 that cooperates with the external thread; One end is provided with a handle portion 12, the handle portion 12, the connecting rod 11 and the piston 9 are provided with a water inlet channel 14 which is sequentially connected and leads to the accommodating cavity. The sealing plug 13 of the channel 14; the second half of the conduit 5 and the transparent seal are provided with scale lines.

During implementation, the injected liquid is generally saline. Meanwhile, in this solution, it is preferable that the material of the second water bladder 3 is silica gel, the material of the flexible layer is silica gel, and the material of the catheter 5 is silica gel, so as to reduce possible damage to the patient.

As shown in FIGS. 1 and 2 , there are a plurality of first water injection ports between the second water bladder 3 and the cavity 6 , and all the first water injection ports are evenly distributed, so that the second water bladder 3 can be expanded more uniformly. There are a plurality of second water injection ports 15 between the first water bladder 2 and the second water bladder 3 and the cavity 6, and all the second water injection ports 15 are evenly distributed, so that the first water bladder 2 and the second water bladder 3 can be rapidly expanded to the maximum volume.

In another embodiment, the cross section of the cavity 6 is circular. As shown in Figures 3 and 4, the first water bladder 2 is located on the groove provided on the outer wall of the catheter 5, and the connecting part of the groove and the outer wall of the catheter 5 is an arc surface 16, so that under the action of negative pressure and gravity during the process, the first water bag 2 The water bladder 2 is absorbed and completely located in the groove, which is more conducive to the insertion of the catheter 5, thereby further reducing the possible harm to the patient.

In yet another embodiment, as shown in FIG. 5 , the cervical dilation device further includes a support core, which is the support core in the cervical dilation balloon in the prior art, and the cavity 6 is provided with an opening 18, And the guide channel 17 matched with the support core, the opening 18 is located at the rear end of the guide channel 5, there is a gap between the outer wall of the guide channel 17 and the inner wall of the guide channel 5, and the hose 7 is located between the outer wall of the guide channel 17 and the inner wall of the guide tube 5. The cavity 6 is connected. The gap makes the cavity 6 between the outer side wall of the guide channel 17 and the inner side wall of the conduit 5 communicate with each other in a circumferential direction. Combined with the arrangement of multiple first or second water injection ports 15 , uniform and rapid liquid injection can be achieved.

When applying, insert the guide wire of the support core into the guide channel 17 through the opening 18, make the front end of the guide wire contact the front end of the guide channel 17, and then use the joint of the support core and the opening 18 to fix the guide wire to avoid being located in the guide channel 17. The inner guide wire is relatively displaced relative to the guide channel 17, and the use of the support core increases the degree of controllability during operation (ie, the degree of controllability during the insertion of the cervical dilation device).

At the same time, a liquid pressure sensor is installed on the hose 7 to collect and display the pressure of the liquid in the hose, which is equal to the pressure of the liquid in the second water bladder 3, so as to prevent medical staff from dilating the patient when the pressure is unclear Blind injection of fluid in the cervix affects the health of patients. The liquid pressure sensor is a miniature integrated digital display liquid pressure sensor, and its model is PT505.

Claims (8)

1. The cervix dilatation device is characterized by comprising a catheter (5) with a cavity (6), wherein the front end of the catheter (5) is hemispherical (1), the outer wall of the catheter (5) is sequentially provided with a first water bag (2), a second water bag (3) and a third water bag (4) which are communicated with the cavity (6) and distributed annularly from top to bottom, the first water bag (2) and the third water bag (4) comprise fiber layers and flexible layers positioned on two sides of the fiber layers, the second water bag (3) is made of flexible materials, and the rear end of the catheter (5) is provided with a hose (7) communicated with the cavity (6);

the other end of the hose (7) is provided with a transparent liquid injection piece (8) with an accommodating cavity, the cross section of the accommodating cavity is circular, the hose (7) is communicated with the accommodating cavity, a piston (9) is arranged in the transparent liquid injection piece (8), one end, far away from the hose (7), of the piston (9) is provided with a connecting rod (11) which extends out of the transparent liquid injection piece (8) and is provided with an external thread, and one end, far away from the hose (7), of the transparent liquid injection piece (8) is provided with a threaded hole (10) matched with the external thread; a handle part (12) is arranged at the other end of the connecting rod (11), a water inlet channel (14) which is communicated in sequence and leads to the accommodating cavity is formed in the handle part (12), the connecting rod (11) and the piston (9), and a detachable sealing plug (13) for sealing the water inlet channel (14) is arranged on the handle part (12); and scale marks are arranged on the rear half section of the conduit (5) and the transparent sealing element.

2. The cervical dilation device according to claim 1, wherein the second water bladder (3) is made of silica gel.

3. The cervical dilation device of claim 1 wherein the flexible layer is made of silicone.

4. The cervical dilation device according to claim 1, wherein the conduit (5) is made of silicone.

5. Cervical dilation device according to claim 1 characterized in that between the second water bladder (3) and the cavity (6) there are a plurality of first water injection ports, all of which are evenly distributed.

6. Cervical dilation device according to claim 1 characterized in that said cavity (6) is circular in cross section.

7. The cervical dilation device according to claim 1, further comprising a support core, wherein a guide channel (17) having an opening (18) is disposed in the cavity (6) and cooperating with the support core, the opening (18) is located at the rear end of the conduit (5), a gap is provided between the outer side wall of the guide channel (17) and the inner side wall of the conduit (5), and the hose (7) is communicated with the cavity (6) between the outer side wall of the guide channel (17) and the inner side wall of the conduit (5).

8. Cervical dilation device according to any one of claims 1 to 7, characterized in that said hose (7) is fitted with a liquid pressure sensor.

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