CN219398670U - Cervical dilation device - Google Patents

Abstract

The utility model provides a cervical dilatation device which comprises a catheter, wherein one end of the catheter is closed, the other end of the catheter is open, the open end of the catheter is provided with a perfusion mechanism which is communicated with an air source or physiological saline water and injects the air or the physiological saline water into the catheter, a balloon is arranged at the position, close to the closed end, of the catheter, the wall of the catheter is provided with a through hole which is communicated with the balloon, and the surface of the balloon is provided with a muscle relaxation medicament layer. In the utility model, the surface of the balloon is provided with the muscle relaxing medicament layer so as to relieve smooth muscle spasm during cervical dilation operation, so that the cervix is quickly relaxed, the operation comfort is improved, and the uterus dilating speed and effect are improved.

Description

Cervical dilation device

Technical Field

The utility model belongs to the field of medical appliances, and particularly relates to a cervical dilation device.

Background

The cervical dilation balloon is a midwifery instrument, which simulates fetal head to press cervical by mechanical stimulation and has the functions of softening and dilating cervical. The operation principle is that normal saline is sequentially injected into the catheter, so that the balloon communicated with the catheter is gradually increased, and the cervical of a patient is stimulated by utilizing the physical expansion effect of the balloon, so that the cervical can be naturally and gradually expanded or softened, the success rate of labor induction is improved, and the injury to the patient is reduced.

The prior cervical dilation balloon structure has the following two defects, namely that the cervical is dilated simply by virtue of the physical supporting function of the balloon, uncomfortable phenomena such as muscle spasm and the like can be caused during the dilation, and the dilation effect and the dilation speed are influenced. The second disadvantage is that the cervical dilation balloon is not communicated with the normal saline, when in dilation operation, the normal saline is poured into the beaker at first, so that the syringe is convenient to extract, and the normal saline is pushed into the catheter after the syringe extracts the normal saline, and as the cervical is gradually dilated, the operation needs to be repeated for many times, and inconvenience is brought to the dilation operation.

Disclosure of Invention

In view of the above, the present utility model aims to provide a cervical dilation device, which solves the problem of muscle spasm by using medicines, improves the comfort level of operation, improves the cervical dilation effect and speed, and improves the convenience of catheter filling operation by arranging a catheter which is communicated with normal saline or air source and has a unidirectional perfusion structure.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the cervical dilation device comprises a catheter, one end of the catheter is closed, the other end of the catheter is open, a perfusion mechanism which is communicated with an air source or physiological saline water and is used for injecting the air or the physiological saline into the catheter is arranged at the open end of the catheter, a balloon is arranged at the position, close to the closed end, of the catheter, a through hole which is communicated with the balloon is formed in the wall of the catheter, and a muscle relaxing medicament layer is arranged on the surface of the balloon.

Further, the filling mechanism comprises a first one-way valve, a filling pipe and a second one-way valve which are sequentially communicated outwards from an opening port of the catheter, the filling pipe is bypassed with an injection cylinder, the injection cylinder is matched with a piston, the piston is matched with a piston shaft, and the piston shaft is matched with a piston handle;

the second one-way valve inlet is communicated with an air source or normal saline, and the injection cylinder is used for extracting the air or the normal saline and pushing the air or the normal saline into the catheter through the first one-way valve.

Further, the end face of one end of the injection tube, which is away from the filling tube, is provided with a limiting boss, and the injection tube is abutted with the piston handle through the limiting boss.

Further, the syringe is provided with a scale indication for indicating the volume of the extracted gas or the physiological saline.

Further, the muscle relaxant is lidocaine hydrochloride or atropine or scopolamine.

Further, the length of the balloon is 40-60mm, and the wall thickness of the balloon is 0.2mm.

Further, the balloon is a compliant balloon or a semi-compliant balloon.

Compared with the prior art, the cervical dilation device has the following advantages:

(1) In the utility model, the surface of the balloon is coated with the muscle relaxant to relieve smooth muscle spasm during cervical dilation operation, so that the cervix is quickly relaxed, the operation comfort is improved, and the uterus dilation speed and effect are improved.

(2) According to the utility model, the perfusion mechanism is arranged, so that the catheter is directly communicated with the gas or the normal saline, the gas or the normal saline is directly sucked and perfused into the catheter, and finally the catheter enters the balloon, so that the physical inflation effect of the balloon is realized, the operation efficiency and the operation convenience are improved, and the problems of complicated operation and inconvenience in the filling of the balloon in the existing cervical dilation balloon structure are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of a cervical dilation device according to an embodiment of the present utility model;

reference numerals illustrate:

1-a catheter; 11-through holes; 2-balloon; 3-a first one-way valve; 4-a second one-way valve; 5-filling the tube; 6-a syringe; 62-limiting bosses; 7-a sealing ring; 8-a piston; 9-a piston shaft; 91-piston stem.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1, a cervical dilation device comprises a catheter 1, wherein the catheter 1 is a hard material catheter, such as a hard medical PVC catheter or a hard medical plastic catheter, and the catheter 1 can also be a soft material catheter, such as a soft medical PVC catheter. The catheter 1 is closed at one end and open at the other end, the open end of the catheter 1 is provided with a perfusion mechanism which is communicated with an air source or physiological saline and is used for injecting the air or the physiological saline into the catheter 1, the catheter 1 is provided with a balloon 2 with the length of 40-60mm and the wall thickness of 0.2mm near the closed end, and the balloon 2 is a compliant balloon or a semi-compliant balloon. The wall of the catheter 1 is provided with a through hole 11 communicated with the balloon 2, so that gas or normal saline infused into the catheter enters the balloon through the through hole 11 to expand the balloon, and the physical inflation effect of the balloon is realized. The surface of the balloon 2 is provided with a muscle relaxing medicament layer. The muscle relaxant is lidocaine hydrochloride or atropine or scopolamine. After the utility model is produced, the saccule is dip-coated or sprayed with muscle relaxing agent, then the saccule is dried and solidified at room temperature, a muscle relaxing agent layer is formed on the surface of the saccule, and finally the product is fixedly packaged.

When the cervical dilatation is performed, the muscle relaxant can relieve cervical smooth muscle spasm, so that the cervix can relax rapidly, and the cervical dilatation speed and the cervical comfort level are improved. According to the utility model, the catheter can be directly communicated with gas or normal saline, and is directly sucked and infused into the catheter through the infusion mechanism, and finally enters the balloon, so that the balloon is expanded to expand the cervical support, and the operation efficiency and the operation convenience are greatly improved.

The filling mechanism is specifically structured that a catheter open port is externally and sequentially communicated with a first one-way valve 3, a filling pipe 5 and a second one-way valve 4, wherein an outlet of the first one-way valve 3 is connected with an open end of the catheter 1, an outlet of the filling pipe 5 is connected with an inlet of the first one-way valve 3, an outlet of the second one-way valve 4 is connected with an inlet of the filling pipe 5, and an inlet of the second one-way valve 4 is externally connected with an air source or normal saline through a hose during cervical dilation operation. The filling tube 5 bypasses the injection tube 6, the injection tube 6 is matched with the piston 8, the piston 8 is provided with the sealing ring 7, the piston 8 is matched with the piston shaft 9, the piston shaft 9 is matched with the piston handle 91, and the injection tube 6, the piston 8, the piston shaft 9 and the piston handle 91 form a suction-pushing structure which is the same as the suction-pushing structure of the syringe and is not described in detail herein. In this embodiment, taking the external normal saline of the second one-way valve 4 as an example, the piston 8 is pulled out (moved toward the end of the injection tube away from the filling tube), the external normal saline is sucked into the filling tube 5 and the injection tube 6, the piston 8 is pushed inward, the second one-way valve 4 is arranged to prevent the reverse flow of the normal saline in the filling tube 5, and the normal saline in the filling tube 5 and the injection tube 6 is pushed into the catheter 1 through the first one-way valve 3, and finally enters the balloon 2 through the through hole 11. The arrangement of the first one-way valve 3 prevents the physiological saline in the catheter from flowing backwards, and the physiological saline perfusion quantity in the catheter is stable. Thus, the reciprocating operation is performed, the space between the balloons is enlarged, and the cervix is gradually expanded.

In order to grasp the physiological saline injection amount information injected into the catheter, the syringe 6 is provided with a scale indication indicating the volume of the extracted gas or physiological saline.

In the utility model, the end face of one end of the injection tube 6, which is away from the filling tube 5, is provided with a limiting boss 62, the limiting boss 62 is abutted with a piston handle 91, and the piston 8 is positioned in the injection tube 6 and is nearest to the filling tube 5. The limit structure formed by the limit boss 62 and the piston handle 91 limits the inward movement position of the piston 8, prevents the piston 8 from moving into the filling pipe 5, and meanwhile, the diameter of the limit boss 62 is smaller than that of the piston handle 91, so that the piston handle 91 is conveniently pulled outwards, and the convenience of reciprocating pushing action of the piston 8 is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (7)

1. A cervical dilation device, characterized in that: the catheter comprises a catheter (1), one end of the catheter is closed, the other end of the catheter is open, the catheter (1) is provided with a perfusion mechanism which is communicated with an air source or physiological saline water and is used for injecting the air or the physiological saline water into the catheter (1) at the open end of the catheter, the catheter (1) is provided with a balloon (2) at the position close to the closed end, the wall of the catheter (1) is provided with a through hole (11) communicated with the balloon (2), and the surface of the balloon (2) is provided with a muscle relaxing medicament layer.

2. A cervical dilation device according to claim 1 wherein: the filling mechanism comprises a first one-way valve (3), a filling pipe (5) and a second one-way valve (4) which are sequentially communicated outwards from an opening port of the catheter, an injection cylinder (6) is bypassed by the filling pipe (5), a piston (8) is matched with the injection cylinder (6), a piston shaft (9) is matched with the piston (8), and a piston handle (91) is matched with the piston shaft (9);

the inlet of the second one-way valve (4) is communicated with an air source or normal saline, and the injection cylinder (6) is used for extracting the air or the normal saline and pushing the air or the normal saline into the guide pipe (1) through the first one-way valve (3).

3. A cervical dilation device according to claim 2 wherein: one end face of the injection cylinder (6) deviating from the filling pipe (5) is provided with a limiting boss (62), and the limiting boss (62) is abutted with the piston handle (91).

4. A cervical dilation device according to claim 2 wherein: the syringe (6) is provided with a scale indication for indicating the volume of the extracted gas or physiological saline.

5. A cervical dilation device according to claim 1 wherein: the muscle relaxing agent layer is lidocaine hydrochloride or atropine or scopolamine.

6. A cervical dilation device according to claim 1 wherein: the length of the balloon (2) is 40-60mm, and the wall thickness of the balloon is 0.2mm.

7. A cervical dilation device according to claim 1 wherein: the balloon (2) is a compliant balloon or a semi-compliant balloon.