CN113599677A

CN113599677A - Auxiliary expansion device for female pelvic cavity imaging examination

Info

Publication number: CN113599677A
Application number: CN202110912549.8A
Authority: CN
Inventors: 徐名金; 丁晓; 范夕霞
Original assignee: Affiliated Hospital of University of Qingdao
Current assignee: Affiliated Hospital of University of Qingdao
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-11-05

Abstract

The invention belongs to the technical field of medical auxiliary equipment, and relates to an auxiliary expanding device for female pelvic cavity imaging examination, which comprises a main body structure, a plurality of auxiliary expanding devices and a plurality of auxiliary expanding devices, wherein the main body structure comprises a syringe barrel, a front end vent hole, a piston rod, a fixed plug, a rotary handle, a plastic film and a partition film; the syringe barrel is of an oblate cylindrical structure, a cavity gap is formed between the plastic film and the outer side wall of the syringe barrel, the front end vent hole communicates the inner cavity of the syringe barrel with the plastic film, and the partition film partitions the inner cavity of the syringe barrel from the plastic film; the inner side wall of the rear end of the syringe barrel is provided with internal threads, and the position of the inner side wall of the outer barrel close to the outer side wall of the inner barrel is provided with a picture tube; the inserting position and the inflating quantity can be conveniently determined, the repeatability is good, the follow-up review, treatment, curative effect evaluation and the like are facilitated, the range of the pathological changes, the infiltration length and the like are conveniently and accurately determined, the integral structure is complete, scientific and reasonable, the application is convenient, and the application environment is friendly.

Description

Auxiliary expansion device for female pelvic cavity imaging examination

The technical field is as follows:

the invention belongs to the technical field of medical auxiliary equipment, relates to an auxiliary expanding device for female pelvic cavity imaging examination, and particularly relates to an auxiliary expanding device which can fix the insertion position during each examination, is convenient to determine the range of lesion positions, the infiltration width and the like after scanning, has good repeatability, and is convenient for subsequent reexamination, treatment, curative effect evaluation and the like.

Background art:

pelvic tumors are classified into malignant tumors and benign tumors, and have a large number of diseases. Common malignant tumors of female patients comprise cervical cancer, rectal cancer, endometrial cancer, ovarian cancer, uterine sarcoma, vaginal cancer and the like, and common benign tumors or lesions comprise oviduct cyst, ovarian cyst, uterine myoma, vaginal endometriosis and the like. The report of the current situation and trend of Chinese tumor in 2017 shows that the tumor is the main cause of death of Chinese residents in both cities and rural areas. With the improvement of sanitary conditions and the inoculation of HPV vaccine, the incidence rate of cervical cancer is reduced, but cervical cancer is the most common malignant tumor in gynecological tumors, is positioned at the 8 th position of common tumors in women in China, and can invade vagina at a late stage. Vaginal cancer is a gynecological malignant tumor which is rarely seen in clinic. Once the vagina is afflicted with malignant diseases, regardless of whether the primary vagina or cervical cancer invades the vagina, the treatment becomes complicated, and the local treatment methods comprise operations and radiotherapy (external radiotherapy and after-loading radiotherapy). The vagina is a muscular duct with the mucous membrane inside, the upper part is wide, the lower part is narrow, the front part is short, the back part is long, the front wall of the duct is 9-10cm long and is close to the bladder, the back wall of the duct is 10-12cm long and is close to the rectum, and the near end of the vagina wraps the cervix to form the vaginal fornix. The method has the advantages that the method has good image examination on the early stage of the vaginal focus, plays a vital role in judging and treating the later state of disease, does not have a vaginal dilator when carrying out female pelvic cavity CT and MRI examination at present, patients mostly carry out examination under the natural state of the vagina, the vagina is in a front-back wall joint state, and the image acquisition data is sometimes unclear; vaginal suppository for treating vaginitis is available on the market, but the suppository is complex in component texture, is not suitable for fixation and has little effect on vaginal dilation; the vaginal speculum used in gynecological examination adopts artificial closing and expansion, but has no fixing device during expansion, poor repeatability, unsuitability for fixation during imaging examination, difficult repetition of insertion position and instrument thickness, and difficult estimation of the position and severity of tumor infiltration during qualitative diagnosis. Therefore, the auxiliary expanding device for the female pelvic cavity imaging examination is designed, the plastic film with scales is arranged, the vaginal wall is expanded after inflation (or water filling) is carried out, the piston and the piston rod with scales are arranged, the plastic film is contracted and inflated (or water filling) so as to determine the insertion position and the inflation amount (water filling amount), the developing tube is arranged so as to determine the position (the distance from the external opening of the cervix), the range of the pathological change (the length on the longitudinal axis of invading the vaginal mucosa) and the like, the repeatability is good, and the subsequent reexamination, treatment, curative effect judgment and the like are facilitated.

The invention content is as follows:

the invention aims to overcome the defects of the prior art, designs an auxiliary expansion device for female pelvic cavity imaging examination, solves the problem that imaging collected data are not displayed clearly due to the fact that the vaginal walls are in a joint state when examination is carried out under the natural state of the vagina, solves the problems that a suppository cannot be fixed and has poor expansibility when the vagina is expanded by the aid of the suppository, and solves the problems that no fixing device is used for expansion, repeatability is poor, and the inserting position and the thickness of an instrument are difficult to repeat when the vagina speculum is used for expansion.

In order to realize the aim, the main structure of the auxiliary expanding device for female pelvic cavity imaging examination, which is related by the invention, comprises a syringe barrel, a front end vent hole, a piston rod, a fixed plug, a rotary handle, a plastic film and a diaphragm; the syringe barrel is of an oblate cylindrical structure, the inner cavity of the syringe barrel is cylindrical, the front wall of the syringe barrel is of a planar structure, an inelastic plastic film is fixedly coated on the periphery of the syringe barrel, a cavity gap is formed between the plastic film and the outer side wall of the syringe barrel, and a graduated scale is printed on the outer surface of the plastic film in the length direction; four front end vent holes are uniformly formed in the periphery of the front wall of the syringe barrel, the front end vent holes enable the inner cavity of the syringe barrel to be communicated with the plastic film, a partition film is fixedly arranged on the outer side of each front end vent hole and partitions the inner cavity of the syringe barrel from the plastic film, and the plastic film is guaranteed to be in a vacuum state when the device is not used; the inner side wall of the rear end of the syringe barrel is provided with internal threads, the piston is arranged in the syringe barrel, the piston and the syringe barrel are sealed, the piston is provided with a piston rod, external threads are arranged on the whole length or part length of the piston rod, and scale marks are carved on the piston rod in the length direction; the upper surface of the fixed plug is provided with a rotating handle, a rear end vent hole penetrates through the fixed plug, and the periphery of the fixed plug is provided with external threads which are matched with the internal threads of the syringe barrel; the center of the fixed plug is provided with a center hole with internal threads, and the center hole is matched with the external threads on the piston rod; in the initial state, the fixing plug is respectively in threaded connection with the syringe barrel and the piston rod to fix the piston, the piston rod and the syringe barrel, and the plastic film is not inflated and is in a vacuum state.

When the invention is used, the dilator in the initial state is put into the vagina of a patient, the front end of the dilator reaches the outermost end of the cervical orifice, the rotating handle on the fixed plug is rotated, the fixed plug is screwed down from the internal thread of the syringe barrel, the piston rod is pushed forwards, the piston pushes the air to burst the partition membrane from the vent hole at the front end to enter the inner cavity of the plastic membrane to inflate the plastic membrane, when the thickness of the expanded plastic membrane is full of the vagina of the patient, the piston rod is stopped to be pushed, the fixed plug is rotated to the internal thread of the syringe barrel, the piston and the piston rod are fixed, because of the vent hole at the rear end, the inside and the outside atmosphere of the fixed plug are communicated, the pressure intensity at the inner side of the fixed plug is prevented from increasing in the fixing process, the rotation and fixation are not facilitated, the scale size of the outer side of the plastic membrane contacting with the vagina orifice and the scale size on the piston rod are recorded after the fixation, when the patient carries out the next rechecking or treatment, and adjusting the dilator according to the recorded scales to perform dilation operation. The vagina is expanded by inflating, so that the walls of the vagina are separated from the attaching state, the depth and the range of the vaginal lesion invading soft tissues can be displayed by CT or MRI, and the staging of the tumor and the determination of the treatment mode are facilitated. The tumor can be conveniently completely removed in the operation; the target area can be conveniently drawn during the three-dimensional afterloading treatment, and the vagina expanded during the examination is basically consistent with the vagina state during the three-dimensional afterloading treatment of tumor radiotherapy, so that the target area can be more conveniently drawn by accurate image anatomical information.

The device is suitable for female pelvic examination, particularly for patients with cervical cancer invading the vagina or patients with vaginal cancer, the vagina is expanded to be in a generally cylindrical shape through the device, clinical information such as the range of lesion, the infiltration depth and the like can be easily found during CT flat scanning or enhanced scanning and MRI flat scanning or enhanced scanning, and help is provided for radiologists to accurately read the vagina; the gynecologist can give proper stage judgment through the imaging data collected in the presence of the dilator to make a proper surgical treatment scheme; when a patient needs external radiotherapy or three-dimensional afterloading treatment after external irradiation, accurate anatomical information is provided for delineating a target region, so that the accurate target region delineation is made, and the radiation injury of peripheral organs is reduced.

Furthermore, the front end of the plastic film is in a bulging design in the circumferential inflation state, the front end is in a bulging state after inflation, the outer opening of the uterus is located in the central depression, and the circumferential bulging bulge is located at the vaginal fornix position, so that the vaginal fornix state can be observed conveniently, and whether the vaginal fornix disappears or deforms due to tumor invasion can be judged conveniently.

Further, the fixed stopper is fixed as an organic whole with the inner tube of syringe section of thick bamboo, and is unmovable, and the center of fixed stopper is provided with the centre bore of taking the internal thread, and matches with the external screw thread on the piston rod, and the piston rod is rotated to the place ahead, and the piston promotes gas and gets into in the inner chamber of plastic film from the front end air vent and aerifys plastic film, when the thick and thin full of patient's vagina of expanded plastic film, stops rotating the piston rod, and is fixed, the record data, and scan.

Furthermore, the syringe barrel is provided with an inner barrel and an outer barrel, the outer barrel is of an oblate barrel structure, the inner barrel is of a cylindrical barrel structure, a cavity structure is formed between the inner barrel and the outer barrel, a kinescope is arranged at the position, close to the outer side wall of the inner barrel, of the inner side wall of the outer barrel, the kinescope is of a hollow fine straight tubular structure, a CT or MRI developer is filled in the kinescope, the kinescope can develop during scanning, the distance of the front end position (external cervical orifice) of a position expansion device can be judged according to the position and the sequence of a developing and strengthening point on a cross section (axial position), the position and the general length of lesion of the lesion on a longitudinal axis of a vagina are determined, the stage division of tumors is facilitated, the treatment mode is determined, when cervical cancer invades the vagina 1/3, the cervical cancer is stage III, no operation finger evidence exists, and the inguinal lymph node drainage area irradiation is needed during external irradiation.

Furthermore, the number of the kinescopes fixedly arranged on the periphery of the outer side wall of the inner cylinder is 8, and the arrangement sequence and the serial number are as follows: viewing angle, looking from the back end to the front end of the syringe barrel, setting No. 1 kinescopes at 12 noon, and uniformly arranging No. 2, No. 3 and No. 4 kinescopes at intervals of 90 degrees in sequence along clockwise direction; setting No. 5 kinescopes at 13 o' clock at noon, and uniformly distributing No. 6, No. 7 and No. 8 kinescopes at intervals of 90 degrees along the clockwise direction; the number of the kinescopes fixedly arranged on the circumference of the inner side wall of the outer cylinder is 4, and the arrangement sequence and the number are as follows: setting No. 9 picture tubes on the short shaft end above No. 1 picture tube, setting No. 10, No. 11, No. 12 picture tubes on the long shaft end and the short shaft end in turn along the clockwise direction at an interval of 90 degrees; the length of the serial number 1 is 12cm, the serial number 2 is 11cm, the serial number 3 is 10cm, and the like; the back ends of the kinescopes are aligned, the front end of the serial number 1 is 1cm away from the external vaginal opening, the front end of the serial number 2 is 2cm away from the external vaginal opening, and the rest can be done in the same way. Through the design of regular arrangement and ordered length, the distance between the position of the enhancement point and the top end of the dilator can be judged according to the position order of the enhancement point on the cross section after the scanning is finished, and the general length of the lesion on the longitudinal axis of the vagina can be judged.

Furthermore, the syringe barrel, the piston rod, the fixed plug, the rotating handle, the inner barrel and the outer barrel are all made of medical plastic materials. The plastic film is made of medical plastic film, the partition film is made of medical light plastic film, CT developer is injected into the image tube during CT scanning, and nuclear magnetic developer is injected into the image tube during MRI scanning.

Furthermore, the syringe barrel is flushed, CT or magnetic resonance imaging agent is injected into the imaging tube, and water is filled during MRI scanning, so that artifacts caused by gas during scanning can be avoided. When the plastic film expanding device is used, the piston rod is pushed, and the piston enables water to enter the plastic film from the front end vent hole to expand the plastic film.

Compared with the prior art, the invention is provided with the graduated plastic film, expands the vaginal wall after inflation, is convenient for fixation, is provided with the piston and the piston rod with the graduation, contracts and inflates the plastic film, is convenient to determine the insertion position and the inflation quantity, has good repeatability, is convenient for subsequent reexamination, treatment, curative effect evaluation and the like, sets the position and the number of the developing tubes, and is convenient for accurately determining the range of the pathological changes, the infiltration length and the like; the concave structure at the tail end is convenient for knowing the invasion condition of the vaginal fornix in the inflated state; the whole structure is perfect, scientific and reasonable, the application is convenient, and the application environment is friendly.

Description of the drawings:

FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention in its uninflated state.

FIG. 2 is a schematic top view of the overall structural principles of the present invention in its uninflated state.

Fig. 3 is a schematic sectional view of the overall structure of the inflatable pneumatic mattress according to the present invention.

Fig. 4 is a schematic top view of the overall structural principle of the present invention in an inflated state.

Fig. 5 is a schematic diagram of the principle of the arrangement structure of the picture tube in embodiment 2 of the present invention.

Syringe barrel 1, front end vent hole 2, piston 3, piston rod 4, fixed plug 5, rotary handle 6, plastic film 7, inner barrel 8, outer barrel 9, kinescope 10, rear end vent hole 11, partition film 12

The specific implementation mode is as follows:

the invention is further illustrated by the following specific examples in combination with the accompanying drawings.

Example 1:

the auxiliary dilation device for female pelvic cavity imaging examination related to the embodiment comprises a main body structure of a syringe barrel 1, a front end vent hole 2, a piston 3, a piston rod 4, a fixed plug 5, a rotary handle 6, a plastic film 7 and a partition film 12; the shape of the syringe barrel 1 is an oblate cylindrical structure, the inner cavity of the syringe barrel 1 is cylindrical, the front wall of the syringe barrel 1 is of a planar structure, a non-elastic plastic film 7 is fixedly coated on the periphery of the syringe barrel 1, a cavity gap is formed between the plastic film 7 and the outer side wall of the syringe barrel 1, and a graduated scale is printed on the outer surface of the plastic film 7 in the length direction; four front end vent holes 2 are uniformly formed in the periphery of the front wall of the syringe barrel 1, the front end vent holes 2 are used for communicating an inner cavity of the syringe barrel 1 with the plastic film 7, a partition film 12 is fixedly arranged on the outer side of each front end vent hole 2, the partition film 12 is used for partitioning the inner cavity of the syringe barrel 1 from the plastic film 7, and the plastic film 7 is guaranteed to be in a vacuum state when the device is not used; an internal thread is arranged on the inner side wall of the rear end of the syringe barrel 1, the piston 3 is arranged in the syringe barrel 1 and sealed between the internal thread and the piston 3, a piston rod 4 is arranged on the piston 3, an external thread is arranged on the whole length or part length of the piston rod 4, and scale marks are carved on the piston rod 4 in the length direction; the upper surface of the fixed plug 5 is provided with a rotating handle 6, a rear end vent hole 11 penetrates through the fixed plug 5, and the periphery of the fixed plug 5 is provided with external threads matched with the internal threads of the syringe barrel 1; the center of the fixed plug 5 is provided with a center hole with internal threads, and the center hole is matched with the external threads on the piston rod 4; in the initial state, the fixing plug 5 is respectively in threaded connection with the syringe barrel 1 and the piston rod 4 to fix the piston 3, the piston rod 4 and the syringe barrel 1, and the plastic film 7 is not inflated and is in a vacuum state.

When the device is used, the dilator in the initial state is placed in the vagina of a patient, the front end of the dilator reaches the outermost end of the cervical orifice, the rotating handle 6 on the fixing plug 5 is rotated, the fixing plug 5 is screwed down from the internal thread of the syringe barrel 1, the piston rod 4 is pushed forwards, the piston 3 pushes gas to burst the partition membrane 12 from the front end vent hole 2 and enter the inner cavity of the plastic membrane 7 to inflate the plastic membrane 7, when the expanded plastic membrane 7 is thick and thin and fills the vagina of the patient, the piston rod 4 is stopped to be pushed, the fixing plug 5 is rotated to the internal thread of the syringe barrel 1 to fix the piston 3 and the piston rod 4, because the rear end vent hole 11 exists, the inside and outside atmosphere of the fixing plug 5 is communicated, the pressure increase of the inner side of the fixing plug 5 in the fixing process is avoided, the rotation and fixation are not facilitated, after the fixation is finished, the scale size of the outer side of the plastic membrane 7, which is contacted with the vaginal orifice, and the scale size of the piston rod 4 are recorded, when the patient is subjected to the next review or treatment, the dilator is adjusted according to the recorded scales to perform the dilation operation. The vagina is expanded by inflating, so that the walls of the vagina are separated from the attaching state, the depth and the range of the vaginal lesion invading soft tissues can be displayed by CT or MRI, and the staging of the tumor and the determination of the treatment mode are facilitated. The tumor can be conveniently completely removed in the operation; the target area can be conveniently drawn during the three-dimensional afterloading treatment, and the vagina expanded during the examination is basically consistent with the vagina state during the three-dimensional afterloading treatment of tumor radiotherapy, so that the target area can be more conveniently drawn by accurate image anatomical information.

Furthermore, the front end of the plastic film 7 is in a bulging design in the circumferential inflation state, the front end is in a bulging state after inflation, the uterine outer opening is located in the central depression, and the circumferential bulging bulge is located at the vaginal fornix position, so that the vaginal fornix state can be observed conveniently, and whether the vaginal fornix disappears or deforms due to tumor invasion can be judged conveniently.

Example 2:

the utility model relates to a supplementary expanding unit of women's pelvic cavity image science inspection, its major structure is with embodiment 1, fixed stopper 5 is fixed as an organic whole with the inner tube 8 of syringe section of thick bamboo 1, can not remove, the center of fixed stopper 5 is provided with the centre bore of taking the internal thread, and match with the external screw thread on the piston rod 4, rotatory piston rod 4 to the place ahead, piston 3 promotes gas and aerifys plastic film 7 in getting into the inner chamber of plastic film 7 from front end air vent 2, when the plastic film 7 thickness of expanding is full of patient's vagina, stop rotatory piston rod 4, it is fixed, the record data, and scan.

Example 3:

the main structure of the auxiliary dilator for female pelvic imaging examination related to the embodiment is the same as that of

embodiment

1 or 2, the syringe barrel 1 is provided with an inner barrel 8 and an outer barrel 9, the outer barrel 9 is an oblate barrel structure, the inner barrel 8 is a cylindrical barrel structure, a cavity structure is arranged between the inner barrel 8 and the outer barrel 9, a kinescope 10 is arranged at the position, close to the outer side wall of the inner barrel 8, of the inner side wall of the outer barrel 9, the kinescope 10 is a hollow, tiny and straight tubular structure, the kinescope 10 is filled with CT or MRI developer and can develop during scanning, the distance of the front end position (external cervical orifice) of the dilator at the position can be judged according to the position and the sequence of the development enhancing points on the cross section (axial position), the position and the approximate length of the lesion on the longitudinal axis of the vagina are determined, the staging of tumor is facilitated, the treatment mode is determined, when cervical cancer invades 1/3 under the vagina, cervical cancer is stage III, no finger of operation, and irradiation of inguinal lymph node drainage area is required when external irradiation is adopted.

Further, the number of the kinescopes 10 fixedly arranged on the periphery of the outer side wall of the inner cylinder 8 is 8, and the arrangement sequence and the number are as follows: viewing angle, looking from the back end to the front end of the syringe barrel 1, setting No. 1 kinescopes 10 at 12 noon, spacing 90 degrees, and sequentially and uniformly arranging No. 2, No. 3 and No. 4 kinescopes 10 along the clockwise direction; the position of 13 o' clock at noon is provided with No. 5 kinescopes 10, which are arranged at intervals of 90 degrees and are sequentially and uniformly provided with No. 6, No. 7 and No. 8 kinescopes 10 along the clockwise direction; the number of the kinescopes 10 fixedly arranged on the circumference of the inner side wall of the outer cylinder 9 is 4, and the arrangement sequence and the number are as follows: the method comprises the following steps that a No. 9 picture tube 10 is arranged at the short shaft end above a No. 1 picture tube 10, the picture tubes 10 are arranged at intervals of 90 degrees, and the No. 10 picture tube, the No. 11 picture tube and the No. 12 picture tube 10 are sequentially arranged at the long shaft end and the short shaft end along the clockwise direction; the length of the serial number 1 is 12cm, the serial number 2 is 11cm, the serial number 3 is 10cm, and the like; the back ends of the kinescopes 10 are aligned, the front end of the serial number 1 is 1cm away from the vaginal external orifice, the front end of the serial number 2 is 2cm away from the vaginal external orifice, and so on. Through the design of regular arrangement and ordered length, the distance between the position of the enhancement point and the top end of the dilator can be judged according to the position order of the enhancement point on the cross section after the scanning is finished, and the general length of the lesion on the longitudinal axis of the vagina can be judged.

Furthermore, the syringe barrel 1, the piston 3, the piston rod 4, the fixed plug 5, the rotating handle 6, the inner barrel 8 and the outer barrel 9 are all made of medical plastic materials. The plastic film 7 is made of medical plastic film, the partition film 12 is made of medical light plastic film, CT developer is injected into the kinescope 10 during CT scanning, and nuclear magnetic developer is injected into the kinescope 10 during MRI scanning.

Example 4:

the main structure of the auxiliary dilator for female pelvic cavity imaging examination related to the embodiment is the same as that of the embodiment 1 or the embodiment 3, the syringe barrel 1 is flushed with water, the kinescope 10 is injected with CT or magnetic resonance imaging agent, and water is filled during MRI scanning, so that artifacts caused by gas during scanning can be avoided. When the water-saving expansion valve is used, the piston rod 4 is pushed, the piston 3 enters water into the plastic film 7 from the front end vent hole 2, and the plastic film 7 is expanded.

Claims

1. An auxiliary expanding device for female pelvic cavity imaging examination is characterized in that the main structure of the device comprises a syringe barrel, a front end vent hole, a piston rod, a fixed plug, a rotary handle, a plastic film and a diaphragm; the syringe barrel is of an oblate cylindrical structure, the inner cavity of the syringe barrel is cylindrical, the front wall of the syringe barrel is of a planar structure, an inelastic plastic film is fixedly coated on the periphery of the syringe barrel, a cavity gap is formed between the plastic film and the outer side wall of the syringe barrel, and a graduated scale is printed on the outer surface of the plastic film in the length direction; four front end vent holes are uniformly formed in the periphery of the front wall of the syringe barrel, the front end vent holes enable the inner cavity of the syringe barrel to be communicated with the plastic film, and a partition film is fixedly arranged on the outer side of each front end vent hole and partitions the inner cavity of the syringe barrel from the plastic film; the inner side wall of the rear end of the syringe barrel is provided with internal threads, the piston is arranged in the syringe barrel, the piston and the syringe barrel are sealed, the piston is provided with a piston rod, external threads are arranged on the whole length or part length of the piston rod, and scale marks are carved on the piston rod in the length direction; the upper surface of the fixed plug is provided with a rotating handle, a rear end vent hole penetrates through the fixed plug, and the periphery of the fixed plug is provided with external threads which are matched with the internal threads of the syringe barrel; the center of the fixed plug is provided with a center hole with internal threads, and the center hole is matched with the external threads on the piston rod.

2. The auxiliary dilating device for female pelvic imaging examination as claimed in claim 1, wherein the plastic film is bulged at the front end after inflation, the front end is bulged after inflation, the external uterine opening is located in the central depression, and the bulge is located at the vaginal fornix position, so as to facilitate observation of vaginal fornix state and judgment of disappearance or deformation of vaginal fornix due to invasion of tumor.

3. The auxiliary dilating device of claim 2, wherein the fixed plug is fixed to the inner barrel of the syringe barrel and immovable, the center of the fixed plug is provided with a central hole with internal threads, and the central hole is matched with the external threads on the piston rod, the piston rod is rotated forward, the piston pushes air from the air hole at the front end to enter the inner cavity of the plastic film to inflate the plastic film, and when the dilated plastic film is thick and thin, the piston rod is stopped to rotate, fixed, data is recorded, and scanning is performed.

4. The auxiliary dilator for female pelvic imaging examination as claimed in claim 2, wherein the syringe barrel comprises an inner barrel and an outer barrel, the outer barrel is oblate barrel structure, the inner barrel is cylindrical barrel structure, a cavity structure is provided between the inner barrel and the outer barrel, a kinescope is provided at the position close to the outer side wall of the inner barrel at the inner side wall of the outer barrel, the kinescope is hollow, thin and straight tubular structure, the kinescope is filled with CT or MRI developer and can develop during scanning, the distance of the front position (external cervical opening) of the dilator can be judged according to the position and sequence of the development enhancing point on the cross section (axial position), the position and the general length of the lesion on the longitudinal axis of the vagina can be determined, the tumor stage can be conveniently determined, and the treatment mode can be determined.

5. The auxiliary dilating device for female pelvic imaging examination of claim 4, wherein the number of the kinescopes fixedly arranged on the periphery of the outer side wall of the inner cylinder is 8, and the arrangement sequence and the number are as follows: viewing angle, looking from the back end to the front end of the syringe barrel, setting No. 1 kinescopes at 12 noon, and uniformly arranging No. 2, No. 3 and No. 4 kinescopes at intervals of 90 degrees in sequence along clockwise direction; setting No. 5 kinescopes at 13 o' clock at noon, and uniformly distributing No. 6, No. 7 and No. 8 kinescopes at intervals of 90 degrees along the clockwise direction; the number of the kinescopes fixedly arranged on the circumference of the inner side wall of the outer cylinder is 4, and the arrangement sequence and the number are as follows: setting No. 9 picture tubes on the short shaft end above No. 1 picture tube, setting No. 10, No. 11, No. 12 picture tubes on the long shaft end and the short shaft end in turn along the clockwise direction at an interval of 90 degrees; the length of the serial number 1 is 12cm, the serial number 2 is 11cm, the serial number 3 is 10cm, and the like; the back ends of the kinescopes are aligned, the front end of the serial number 1 is 1cm away from the external vaginal opening, the front end of the serial number 2 is 2cm away from the external vaginal opening, and the rest can be done in the same way.

6. The auxiliary dilating device of claim 5 wherein the syringe barrel is flushed with water and the imaging tube is filled with CT or MRI contrast media, and when in use, the plunger rod is pushed and the plunger pushes water from the front vent hole into the plastic film to dilate the plastic film.

7. The auxiliary dilator for female pelvic imaging examination according to any one of claims 1-6, wherein the dilator is suitable for female pelvic examination, especially cervical cancer invading vagina or is a patient with vaginal cancer, by the aid of the dilator, the dilating vagina is in a generally cylindrical shape, and clinical information such as range of lesion, infiltration depth and the like can be easily found during CT flat scanning or enhanced scanning, MRI flat scanning or enhanced scanning, so as to provide assistance for accurate radiograph interpretation of a radiologist; the gynecologist gives proper stage judgment through the imaging data collected in the presence of the dilator, and formulates a proper surgical treatment scheme; when a patient needs external radiotherapy or three-dimensional afterloading treatment after external irradiation, accurate anatomical information is provided for delineating a target region, so that the accurate target region delineation is performed, and the radiation injury of peripheral organs is reduced.