CN108742800B

CN108742800B - Cervical dilation apparatus

Info

Publication number: CN108742800B
Application number: CN201810692708.6A
Authority: CN
Inventors: 张印星; 田颖; 罗淑红; 潘春燕; 彭浩
Original assignee: Edong Healthcare Group City Central Hospital
Current assignee: Edong Healthcare Group City Central Hospital
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2020-03-24
Anticipated expiration: 2038-06-26
Also published as: CN108742800A

Abstract

The invention provides a cervical dilation device, which relates to the technical field of medical instruments, and comprises: the cervical dilator comprises a cervical introducing pipe, a cervical mouth expanding sac and a cervical expanding sac; the tail end of the cervical introducing pipe is provided with a connecting seat, the front end of the cervical introducing pipe is provided with a liquid medicine outlet, and a first pipeline, a second pipeline and a third pipeline are arranged in the cervical introducing pipe; the connecting seat comprises a first channel, a second channel, a third channel and a fourth channel; the first channel is communicated with the first pipeline, the second channel is communicated with the second pipeline, the third channel is communicated with the inner tube of the cervical introducing tube, and the head end of the cervical introducing tube is provided with a drainage port; the fourth channel is communicated with the third pipeline; the positive and negative pressure generator comprises a water injection mechanism, a negative pressure suction mechanism, a medicine injection mechanism and a connecting plug, wherein a first contact pin, a second contact pin, a third contact pin and a fourth contact pin are arranged on the connecting plug.

Description

Cervical dilation apparatus

Technical Field

The invention relates to the technical field of medical instruments, in particular to cervical dilation equipment.

Background

At present, the traditional cervical dilation technology needs to carry out vaginal examination before cervical dilation to know uterine tendency. The probe probes the depth of the uterine cavity, and then the cervix is sequentially dilated by using metal dilating strips. However, the metal instruments are hard and easy to damage the uterine cavity to form sinus, even perforation. And because the uterine cavity and the cervical canal are adhered, the uterus is excessively inclined to form an included angle, so that the probe is difficult to enter.

Disclosure of Invention

The invention aims to provide a cervical dilator, which solves the technical problem that the existing metal cervical dilator can hurt a patient when in use.

The embodiment of the invention provides cervical dilation equipment, which comprises: the cervical dilator comprises a cervical introducing pipe, a cervical mouth expanding bag and a cervical expanding bag, wherein the cervical mouth expanding bag and the cervical expanding bag are sleeved on the outer side of the cervical introducing pipe, the cervical mouth expanding bag is closer to the front end of the cervical introducing pipe relative to the cervical expanding bag, the cervical mouth expanding bag is in an ellipsoid shape, and the cervical expanding bag is in a cylindrical shape;

the tail end of the cervical introducing pipe is provided with a connecting seat, the front end of the cervical introducing pipe is provided with a liquid medicine outlet, a first pipeline, a second pipeline and a third pipeline are arranged in the cervical introducing pipe, one end of the first pipeline penetrates through the cervical introducing pipe to be communicated with the cervical orifice expanding sac, and the other end of the first pipeline is connected with the connecting seat; one end of the second pipeline penetrates through the cervical introducing pipe to be communicated with the cervical dilatation bag, and the other end of the second pipeline is connected with the connecting seat; one end of the third pipeline is connected with the liquid medicine outlet, and the other end of the third pipeline is connected with the connecting seat; the connecting seat comprises a first channel, a second channel, a third channel and a fourth channel;

the first channel is communicated with the first pipeline, and a first one-way valve is arranged between the first channel and the first pipeline; the second channel is communicated with the second pipeline, and a second one-way valve is arranged between the second channel and the second pipeline; the third channel is communicated with the inner tube of the cervical introducing tube, and the head end of the cervical introducing tube is provided with a drainage port; the fourth channel is communicated with the third pipeline;

the positive and negative pressure generator comprises a water injection mechanism, a negative pressure suction mechanism, a medicine injection mechanism and a connecting plug, wherein a first contact pin, a second contact pin, a third contact pin and a fourth contact pin are arranged on the connecting plug; the medicine injection mechanism is connected with the fourth contact pin;

the relative positions of the first pin, the second pin, the third pin and the fourth pin correspond to the relative positions of the openings of the first channel, the second channel, the third channel and the fourth channel on the connecting seat respectively, so that after the connecting plug is connected with the connecting seat in an inserting mode, the first pin is inserted into the first channel, the second pin is inserted into the second channel, the third pin is inserted into the third channel, and the fourth pin is inserted into the fourth channel.

Furthermore, an annular sealing ring extending outwards is arranged on the edge of the end face of the connecting base, so that after the connecting plug is connected with the connecting base in an inserting mode, the annular sealing ring is wrapped on the outer side of the connecting plug.

Furthermore, a first annular accommodating section and a second annular accommodating section which are sunken towards the inside of the cervical introducing pipe are arranged on the cervical introducing pipe, the first annular accommodating part is used for accommodating the cervical opening expanding sac, and the second annular accommodating section is used for accommodating the cervical expanding sac.

Furthermore, the connecting seat has elasticity, and the internal diameters of the first channel, the second channel, the third channel and the fourth channel are respectively and correspondingly smaller than the external diameters of the first contact pin, the second contact pin, the third contact pin and the fourth contact pin, so that after the first contact pin, the second contact pin, the third contact pin and the fourth contact pin are respectively inserted into the first channel, the second channel, the third channel and the fourth channel, the inner walls of the first channel, the second channel and the third channel and the fourth channel are respectively and tightly wrapped on the outer walls of the first contact pin, the second contact pin, the third contact pin and the fourth contact pin.

Furthermore, trumpet-shaped guide structures are arranged at the openings of the first channel, the second channel, the third channel and the fourth channel facing the outside.

Furthermore, the opening positions of the first channel, the second channel, the third channel and the fourth channel are respectively located at four vertex positions of a trapezoid.

Furthermore, the cervical dilator comprises a guide wire, one end of the guide wire is provided with a ball head structure, the size of the ball head structure is larger than that of the drainage opening, the other end of the guide wire is provided with a push-pull ring, and the guide wire is used for guiding the trend of the cervical guide tube after being inserted from the third channel.

Further, the negative pressure suction mechanism includes: the device comprises a battery, a motor, a transmission assembly, a piston, a cylinder body and a collecting cup, wherein the battery is used for providing electric energy for the motor, the piston is connected in the cylinder body in a sliding mode, and a piston cavity is formed by the piston and the inner surface of the cylinder body;

the transmission assembly is connected between an output shaft of the motor and a piston, so that the motor drives the piston to do piston motion in the cylinder body;

the cylinder body comprises an air inlet and an air outlet which are communicated with the piston cavity, and the air inlet is provided with a third one-way valve so that the air inlet only allows airflow to flow into the piston cavity from the outside; the air outlet is provided with a fourth one-way valve so that the air outlet only allows air flow to flow out of the piston cavity to the outside;

the collecting cup comprises a cup body, a first pipe body and a second pipe body, the first pipe body and the second pipe body are connected with the cup body, the first pipe body is connected with an air inlet of the cylinder body, the second pipe body is connected with the connecting plug, so that after the motor is started, a negative pressure is generated at the needle opening of the third contact pin.

Further, the transmission assembly comprises an eccentric wheel and a connecting rod, the eccentric wheel comprises a central shaft hole and an eccentric rod part, and the central shaft hole of the eccentric wheel is used for being connected with an output shaft of the motor;

one end of the connecting rod is hinged with the eccentric rod part, and the other end of the connecting rod is hinged with the piston, so that the connecting rod drives the piston to move back and forth along the depth direction of the cylinder body.

Further, water injection mechanism includes water tank and water pump, the water pump is connected with the water tank, the delivery port of water pump with the three-way valve is connected, the water pump is used for inputing the water in the water tank to first contact pin or second contact pin.

The embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides cervical dilation equipment, which comprises: the cervical dilator is used for directly extending into the cervix of a patient, and the positive and negative pressure generator is used for expanding the cervical dilator to realize the expansion of the cervical canal. The cervical dilator comprises a cervical introducing pipe, a cervical opening dilating bag and a cervical dilating bag, wherein the cervical opening dilating bag and the cervical dilating bag are sleeved outside the cervical introducing pipe, the cervical opening dilating bag is closer to the front end of the cervical introducing pipe relative to the cervical dilating bag, the cervical opening dilating bag is in an ellipsoid shape, and the cervical dilating bag is in a cylindrical shape; the tail end of the cervical introducing pipe is provided with a connecting seat, the front end of the cervical introducing pipe is provided with a liquid medicine outlet, a first pipeline, a second pipeline and a third pipeline are arranged in the cervical introducing pipe, one end of the first pipeline penetrates through the cervical introducing pipe to be communicated with the cervical orifice expanding sac, and the other end of the first pipeline is connected with the connecting seat; one end of the second pipeline penetrates through the cervical introducing pipe to be communicated with the cervical dilatation bag, the other end of the second pipeline is connected with the connecting seat, the first channel is filled with water, the cervical orifice dilatation bag can be expanded, and the second channel is filled with water, so that the cervical dilatation bag can be expanded. One end of the third pipeline is connected with the liquid medicine outlet, the other end of the third pipeline is connected with the connecting seat, and the connecting seat comprises a first channel, a second channel, a third channel and a fourth channel; the first channel is communicated with the first pipeline, and a first one-way valve is arranged between the first channel and the first pipeline; the second channel is communicated with the second pipeline, and a second one-way valve is arranged between the second channel and the second pipeline; the third channel is communicated with the inner tube of the cervical introducing tube, and the head end of the cervical introducing tube is provided with a drainage port; the fourth channel is communicated with the third pipeline; the positive and negative pressure generator comprises a water injection mechanism, a negative pressure suction mechanism, a medicine injection mechanism and a connecting plug, wherein a first contact pin, a second contact pin, a third contact pin and a fourth contact pin are arranged on the connecting plug; the relative positions of the first pin, the second pin, the third pin and the fourth pin correspond to the relative positions of the openings of the first channel, the second channel, the third channel and the fourth channel on the connecting seat respectively, so that after the connecting plug is connected with the connecting seat in an inserting mode, the first pin is inserted into the first channel, the second pin is inserted into the second channel, the third pin is inserted into the third channel, and the fourth pin is inserted into the fourth channel. The application process of the cervical dilation equipment provided by the embodiment of the invention comprises the following steps: 1. extending a cervical introducer tube into a patient; 2. butting the connecting seat with the connecting plug; 3. changing the three-way valve to communicate the water injection mechanism with the first contact pin, so as to inject water into the cervical orifice expanding sac to expand the cervical orifice expanding sac; 4. the cervix uteri introducing tube is pulled outwards to enable the expanded cervix uteri opening expanding capsule to be clamped at the cervix uteri opening; 5. changing the three-way valve to communicate the water injection mechanism with the second contact pin, so as to inject water into the cervical dilatation bag and expand the cervical dilatation bag; 6. when the waste in the cervix is required to be removed, the negative pressure suction mechanism can be opened, so that the waste is sucked out of the body through the drainage port on the cervix introducing pipe; 7. when the liquid medicine needs to be delivered to the cervix, the liquid medicine is injected into the cervix by the medicine injection mechanism through the fourth contact pin and the fourth channel.

The cervical dilation apparatus provided by the embodiment of the invention has the advantages that:

1. the cervical introducing tube is used for extending into the body of a patient, and the tube body extends along the curve of the cervix of the patient and does not damage the cervix of the patient;

2. the cervix uteri is gradually dilated in a water injection mode, and the stimulation of the slow and uniform dilatation action to a patient is small;

3. compared with the traditional cervical dilator with a plurality of extending heads at the tail end, the cervical dilator of the cervical dilation device provided by the embodiment of the invention has a simpler external structure, the connecting pipelines are gathered in the connecting seat, and a doctor can hold the cervical dilator by one hand to conveniently complete pipeline connection.

4. The cervical dilator and the positive and negative pressure generator are connected by adopting a connecting seat and a connecting plug, the connection of the cervical dilator and the positive and negative pressure generator can be completed by one-time insertion, and the interfaces on the connecting seat correspond to the contact pins of the connecting plug, so that the interface on the cervical dilator is not required to be distinguished to be connected with the cervical os dilation bag and to be connected with the cervical os dilation bag, and the operation is simple and convenient;

5. the water injection action of the cervical orifice expanding sac and the cervical expanding sac can be completed by using a water injection mechanism and a three-way valve, and the cervical dilator and the positive and negative pressure generator do not need to be plugged and unplugged when the cervical dilator is used.

6. The cervical dilation equipment provided by the embodiment of the invention can suck and discharge waste in a patient body, and the function is increased.

7. The cervical dilation device provided by the embodiment of the invention can be used for injecting liquid medicine, such as anesthetic, into a patient, so that the function of the cervical dilation device is increased.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a cervical dilator in a cervical dilation apparatus provided in accordance with an embodiment of the present invention when not expanded;

fig. 2 is a schematic view of a cervical dilator in a cervical dilation apparatus provided in accordance with an embodiment of the present invention as it is expanded;

fig. 3 is a schematic view of the internal structure of a cervical dilator in the cervical dilating apparatus according to the embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the portion A of FIG. 3;

fig. 5 is a schematic diagram of a positive/negative pressure generator in the cervical dilation apparatus provided by an embodiment of the present invention;

fig. 6 is a schematic view of a connection plug in the cervical dilation apparatus provided by an embodiment of the present invention.

Icon: 110-cervical canal; 111-a first conduit; 112-a second conduit; 113-a third conduit; 120-cervical dilatation balloon; 130-cervical dilatation balloon; 140-a connecting seat; 141-a first channel; 142-a second channel; 143-a third channel; 144-a fourth channel; 145-ring seal; 200-a connection plug; 210-a first pin; 220-second pin; 230-third pin; 240-fourth pin; 250-three-way valve; 300-a guide wire; 410-a battery; 420-a motor; 430-a transmission assembly; 440-a piston; 450-cylinder body; 460-a collection cup; 510-a water tank; 520-a water pump; 610-liquid medicine bottle; 620-liquid medicine pump.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, an embodiment of the present invention provides a cervical dilation apparatus comprising: the cervical dilator is used for directly extending into the cervix of a patient, and the positive and negative pressure generator is used for expanding the cervical dilator to realize the expansion of the cervical canal. The cervical dilator comprises a cervical introducing tube 110, a cervical mouth expanding bag 120 and a cervical expanding bag 130, wherein the cervical mouth expanding bag 120 and the cervical expanding bag 130 are both sleeved outside the cervical introducing tube 110, the cervical mouth expanding bag 120 is closer to the front end of the cervical introducing tube 110 relative to the cervical expanding bag 130, the cervical mouth expanding bag 120 is ellipsoidal, and the cervical expanding bag 130 is cylindrical; the tail end of the cervical introducing tube 110 is provided with a connecting seat 140, the front end of the cervical introducing tube 110 is provided with a liquid medicine outlet, a first pipeline 111, a second pipeline 112 and a third pipeline 113 are arranged in the cervical introducing tube 110, one end of the first pipeline 111 passes through the cervical introducing tube 110 to be communicated with the cervical orifice expanding sac 120, and the other end of the first pipeline is connected with the connecting seat 140; one end of the second tube 112 passes through the cervical introduction tube 110 to communicate with the cervical dilatation balloon 130, and the other end is connected with the connecting seat 140, so that the cervical os dilatation balloon 120 can be expanded by injecting water into the first channel 141, and the cervical dilatation balloon 130 can be expanded by injecting water into the second channel 142; one end of the third pipeline 113 is connected with the liquid medicine outlet, and the other end is connected with the connecting seat. The connection seat 140 includes a first passage 141, a second passage 142, a third passage 143, and a fourth passage 144; the first channel 141 is communicated with the first pipeline 111, and a first one-way valve is arranged between the first channel 141 and the first pipeline 111; the second channel 142 is communicated with the second pipeline 112, and a second one-way valve is arranged between the second channel and the second pipeline; the third channel 143 is communicated with the inner tube of the cervical introducing tube 110, and the head end of the cervical introducing tube 110 is provided with a drainage port; the fourth passage 144 communicates with the third conduit 113; the positive and negative pressure generator comprises a water injection mechanism, a negative pressure suction mechanism, a medicine injection mechanism and a connecting plug 200, wherein a first contact pin 210, a second contact pin 220, a third contact pin 230 and a fourth contact pin 240 are arranged on the connecting plug 200, the first contact pin 210 and the second contact pin 220 are connected with the water injection mechanism through a three-way valve 250, so that the three-way valve 250 can control the first contact pin 210 or the second contact pin 220 to spray water, and the third contact pin 230 is connected with the negative pressure suction mechanism; the relative positions of the first pin 210, the second pin 220, the third pin 230 and the fourth pin 240 respectively correspond to the relative positions of the openings of the first channel 141, the second channel 142, the third channel 143 and the fourth channel 144 on the connecting seat 140, so that after the connecting plug 200 is plugged with the connecting seat 140, the first pin 210 is inserted into the first channel 141, the second pin 220 is inserted into the second channel 142, the third pin 230 is inserted into the third channel 143, and the fourth pin 240 is inserted into the fourth channel 144. The application process of the cervical dilation equipment provided by the embodiment of the invention comprises the following steps: 1. extending cervical introducer tube 110 into the patient; 2. docking the connection socket 140 with the connection plug 200; 3. changing the three-way valve 250 to communicate the water injection mechanism with the first contact pin 210, so as to inject water into the cervical orifice expanding sac 120 and expand the same; 4. tearing the cervical introducing tube 110 outwards to clamp the expanded cervical opening expanding sac 120 at the cervical opening; 5. the three-way valve 250 is changed to communicate the water injection mechanism with the second needle 220, so that water is injected into the cervical dilatation balloon 130 to expand the cervical dilatation balloon; 6. when the waste in the cervix is required to be removed, the negative pressure suction mechanism can be started, so that the waste is sucked out of the body through the drainage port on the cervix introducing tube 110; 7. when the liquid medicine needs to be delivered to the cervix, the liquid medicine is injected into the cervix through the fourth needle 240 and the fourth channel 144 by using the medicine injection mechanism.

Further, in order to increase the connection firmness of the connection seat 140 and the connection plug 200 and reduce the probability that the connection plug 200 falls off from the connection seat 140, an annular sealing ring 145 extending outward is arranged on the edge of the end surface of the connection seat 140, so that after the connection plug 200 is plugged into the connection seat 140, the annular sealing ring 145 is wrapped on the outer side of the connection plug 200. The material of annular seal ring is also silica gel, has certain elasticity, and the frictional force of its own internal surface is also bigger, and the annular seal ring of parcel on connecting plug 200 outer wall can play stable connection effect, also can prevent that connecting plug 200 from taking place the slope for connecting seat 140.

In order to ensure that the thickness of the internal section of the cervical dilator is consistent, the cervical introducing tube 110 is provided with a first annular accommodating section and a second annular accommodating section which are recessed inside the cervical introducing tube 110, the first annular accommodating part is used for accommodating the cervical os dilating sac 120, and the second annular accommodating section is used for accommodating the cervical dilating sac 130. When cervical orifice dilation balloon 120 and cervical dilation balloon 130 are in an uninflated state, the two are respectively sunk into the first annular accommodating section and the second annular accommodating section, so that the thickness of the section of the cervical dilator extending into the body is consistent, stimulation to the cervix of a patient is reduced during extension, resistance is smaller, and the cervix can extend into the body more easily.

Further, the connecting seat 140 has elasticity, and inner diameters of the first, second, third and

fourth channels

141, 142, 143 and 144 are respectively and correspondingly smaller than outer diameters of the first, second, third and

fourth pins

210, 220, 230 and 240, so that after the first, second, third and

fourth pins

210, 220, 230 and 240 are respectively inserted into the first, second, third and

fourth channels

141, 142, 143 and 144, inner walls of the first, second, third and

fourth channels

141, 142, 143 and 144 respectively tightly wrap outer walls of the first, second, third and

fourth pins

210, 220, 230 and 240. The connecting seat 140 may be made of silica gel, the first channel 141, the second channel 142, the third channel 143, and the fourth channel 144 are all thin, the first channel 141, the second channel 142, the third channel 143, and the fourth channel 144 are expanded after the insertion pin is inserted, and the silica gel has elasticity and wraps the insertion pin, so that the sealing property is ensured, and the connection between the connecting seat 140 and the connecting plug 200 is more stable.

As shown in fig. 4, further, the openings of the first channel 141, the second channel 142, the third channel 143, and the fourth channel 144 facing the outside are provided with trumpet-shaped guide structures. The wide opening is located on the end face of the connecting base 140, so that the contact pin can be conveniently inserted, and along with the insertion of the contact pin, the trumpet-shaped guide structure can gradually guide the contact pin into the channel, so that the connecting base 140 and the connecting plug 200 are more easily aligned and connected.

Further, the opening positions of the first channel 141, the second channel 142, the third channel 143 and the fourth channel 144 are located at four vertices of a trapezoid. The channel openings are arranged in a trapezoidal shape, so that a user can insert the connecting plug 200 on the connecting seat 140 by visual observation, and the first pin 210, the second pin 220, the third pin 230 and the fourth pin 240 are directly butted with the first channel 141, the second channel 142, the third channel 143 and the fourth channel 144, so that the phenomenon of wrong insertion of the pins and the channels can be avoided.

Furthermore, because the cervical introducer 110 is made of silica gel, it is relatively soft, and it may be relatively hard to insert into the body of a patient, the cervical dilator includes the guide wire 300, one end of the guide wire 300 is provided with a ball head structure, the size of the ball head structure is larger than that of the drainage opening, the ball head structure abuts against the inner wall of the front end of the cervical introducer 110, the other end of the guide wire 300 is provided with a push-pull ring, the push-pull ring is arranged outside the connecting seat 140, a doctor hooks the push-pull ring, can push the cervical introducer 110 into the body of the patient, and when the cervical introducer 110 moves in place, can fix the cervical introducer 110 and pull out the guide wire 300.

As shown in fig. 5 to 6, further, the negative pressure suction mechanism includes: a battery 410, a motor 420, a transmission assembly 430, a piston 440, a cylinder 450 and a collection cup 460, wherein the battery 410 is used for providing electric energy for the motor 420, the piston 440 is slidably connected in the cylinder 450, and the piston 440 and the inner surface of the cylinder 450 form a piston 440 cavity; the transmission assembly 430 is connected between an output shaft of the motor 420 and the piston 440, so that the motor 420 drives the piston 440 to move in the cylinder 450 as the piston 440 moves, and the volume of the cavity of the piston 440 increases or decreases; the cylinder 450 comprises an air inlet and an air outlet which are both communicated with the cavity of the piston 440, and the air inlet is provided with a third one-way valve so that the air inlet only allows air flow to flow into the cavity of the piston 440 from the outside; the air outlet is provided with a fourth one-way valve, so that the air outlet only allows air flow to flow out from the cavity of the piston 440 to the outside, when the piston 440 moves outwards, the air inlet enters air, negative pressure is generated at the sputum suction pipe, and when the piston 440 moves inwards, air in the cavity of the piston 440 is discharged through the air outlet; the collecting cup 460 includes a cup body, and a first pipe and a second pipe connected to the cup body, the first pipe is connected to the air inlet of the cylinder body 450, and the second pipe is connected to the connection plug 200, so that after the motor 420 is started, a negative pressure is generated at the needle opening of the third contact pin 230. The piston 440 is reciprocated by the rotation of the motor 420, so that a negative pressure is generated at the suction port of the third insertion needle 230, and waste in the patient is sucked into the collection cup 460.

Specifically, the transmission assembly 430 includes an eccentric wheel and a connecting rod, the eccentric wheel includes a central shaft hole and an eccentric rod part, and the central shaft hole of the eccentric wheel is connected with the output shaft of the motor 420; one end of the connecting rod is hinged to the eccentric rod, and the other end of the connecting rod is hinged to the piston 440, so that the connecting rod drives the piston 440 to move back and forth along the depth direction of the cylinder 450. The motor 420 rotates the eccentric wheel, and the eccentric rod rotates around the central shaft hole, thereby moving the piston 440 back and forth via the connecting rod, and changing the volume of the cavity of the piston 440.

Further, the water filling mechanism comprises a water tank 510 and a water pump 520, the water pump 520 is connected to the water tank 510, a water outlet of the water pump 520 is connected to the three-way valve 250, and the water pump 520 is used for inputting water in the water tank 510 to the first or

second contact pin

210 or 220.

Further, the medicine injection mechanism comprises a medicine liquid bottle 610 and a medicine liquid pump 620, the medicine liquid pump 620 is connected with the medicine liquid bottle 610, a medicine outlet of the medicine liquid pump 620 is connected with the fourth contact pin 240, and the medicine liquid pump 620 is used for inputting medicine liquid in the medicine liquid bottle 610 to the fourth contact pin 240.

1. the cervical introducing tube 110 is used for extending into the patient, and the tube body extends along the curve of the cervix of the patient, so that the cervix of the patient cannot be damaged;

3. compared with the traditional cervical dilator with a plurality of extending heads at the tail end, the cervical dilator of the cervical dilation device provided by the embodiment of the invention has a simpler external structure, the connecting pipelines are gathered in the connecting seat 140, and a doctor can hold the cervical dilator by one hand to conveniently complete pipeline connection.

4. The cervical dilator and the positive and negative pressure generator are connected by adopting a connecting way of the connecting seat 140 and the connecting plug 200, the connection of the cervical dilator and the positive and negative pressure generator can be completed by one-time splicing, and the interface on the connecting seat 140 corresponds to the contact pin of the connecting plug 200, so that the distinction of which interface on the cervical dilator is connected with the cervical orifice dilating sac 120 and which interface is connected with the cervical dilating sac 130 is not needed, and the cervical dilator is simple and convenient;

5. the water injection action of the cervical orifice expanding capsule 120 and the cervical expanding capsule 130 can be completed by using a water injection mechanism and a three-way valve 250, and the cervical dilator and the positive and negative pressure generator do not need to be plugged and unplugged when the cervical dilator is used.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cervical dilation apparatus, comprising: the cervical dilator comprises a cervical introducing pipe, a cervical mouth expanding bag and a cervical expanding bag, wherein the cervical mouth expanding bag and the cervical expanding bag are sleeved on the outer side of the cervical introducing pipe, the cervical mouth expanding bag is closer to the front end of the cervical introducing pipe relative to the cervical expanding bag, the cervical mouth expanding bag is in an ellipsoid shape, and the cervical expanding bag is in a cylindrical shape;

the tail end of the cervical introducing pipe is provided with a connecting seat, the front end of the cervical introducing pipe is provided with a liquid medicine outlet, a first pipeline, a second pipeline and a third pipeline are arranged in the cervical introducing pipe, one end of the first pipeline penetrates through the cervical introducing pipe to be communicated with the cervical orifice expanding sac, and the other end of the first pipeline is connected with the connecting seat; one end of the second pipeline penetrates through the cervical introducing pipe to be communicated with the cervical dilatation sac, and the other end of the second pipeline is connected with the connecting seat; one end of the third pipeline is connected with the liquid medicine outlet, and the other end of the third pipeline is connected with the connecting seat; the connecting seat comprises a first channel, a second channel, a third channel and a fourth channel;

the first channel is communicated with a first pipeline, and a first one-way valve is arranged between the first channel and the first pipeline; the second channel is communicated with a second pipeline, and a second one-way valve is arranged between the second channel and the second pipeline; the third channel is communicated with the inner tube of the cervical introducing tube, and the head end of the cervical introducing tube is provided with a drainage port; the fourth channel is communicated with the third pipeline;

2. The cervical dilation device according to claim 1, wherein an annular sealing ring extending outward is provided on an edge of an end surface of the connecting block, such that the annular sealing ring is wrapped around an outer side of the connecting plug after the connecting plug is inserted into the connecting block.

3. The cervical dilation apparatus according to claim 1, wherein the cervical lead-in tube is provided with a first annular receiving section and a second annular receiving section that are recessed inside the cervical lead-in tube, the first annular receiving section being configured to receive the cervical dilation balloon, the second annular receiving section being configured to receive the cervical dilation balloon.

4. The cervical dilation apparatus according to claim 1, wherein the connecting seat has elasticity, and inner diameters of the first channel, the second channel, the third channel and the fourth channel are respectively smaller than outer diameters of the first pin, the second pin, the third pin and the fourth pin, so that after the first pin, the second pin, the third pin and the fourth pin are respectively inserted into the first channel, the second channel, the third channel and the fourth channel, inner walls of the first channel, the second channel and the third channel respectively tightly wrap outer walls of the first pin, the second pin, the third pin and the fourth pin.

5. The cervical dilation device of claim 4 wherein the outwardly facing openings of the first, second, third and fourth channels are each provided with a trumpet-like guide structure.

6. The cervical dilation device of claim 1 wherein the opening locations of the first, second, third and fourth channels are located at four apex locations of a trapezoid, respectively.

7. The cervical dilation apparatus according to claim 1, wherein the cervical dilator includes a guide wire, one end of the guide wire is provided with a ball head structure, the size of the ball head structure is larger than that of the drainage opening, the other end of the guide wire is provided with a push-pull ring, and the guide wire is used for guiding the trend of the cervical introducer after being inserted from the third channel.

8. The cervical dilation apparatus of claim 1, wherein the negative pressure suction mechanism comprises: the device comprises a battery, a motor, a transmission assembly, a piston, a cylinder body and a collecting cup, wherein the battery is used for providing electric energy for the motor, the piston is connected in the cylinder body in a sliding mode, and a piston cavity is formed by the piston and the inner surface of the cylinder body;

9. The cervical dilation apparatus according to claim 8, wherein the transmission assembly includes an eccentric and a connecting rod, the eccentric including a central shaft hole and an eccentric rod portion, the central shaft hole of the eccentric for connection with an output shaft of the motor;

10. The cervical dilation apparatus according to claim 1, wherein the water injection mechanism includes a water tank and a water pump, the water pump is connected to the water tank, a water outlet of the water pump is connected to the three-way valve, and the water pump is configured to input water in the water tank to the first insertion pin or the second insertion pin.