66 results about "Cervical dilators" patented technology

Opposing, contoured panels are controllably opened by either a translational or rotational movement of a driving control rod to controllably open or dilate a cervix. An insertion depth limiter, prevents over-insertion of the panels into the uterus thereby preventing accidental perforation of the uterine wall. The device can be straight, curved or articulated to accommodate anatomical differences.

This invention is an improved balloon catheter for cervical dilation. This catheter has a balloon that is passed through the cervix of a pregnant woman, and the balloon is then inflated with 100-120 ml of sterile water or normal saline. The improved disc shape of the inflated balloon is 8 cm in diameter and 3-4 cm in height. The balloon will sweep the amniotic membrane away from the cervix, causing the release of prostaglandins which helps ripen the cervix and initiates uterine contractions. The improved shape of the balloon causes the cervix to be 6-8 cm dilated once it is expelled. This catheter also contains a flexible guidewire that allows for easier insertion for the provider, and makes insertion less painful for the patient because it can be placed without a speculum and ring forcep being used. This catheter could actually be placed on an outpatient basis or in the doctor's office, with the patient instructed to go to the hospital or birthing unit when the catheter falls out. This catheter is smaller in diameter than the 16 French Foley catheter, so therefore it can be placed when the patient is <1 cm dilated. This catheter when placed properly and secured to the patient's thigh with tension applied can shorten labor by 4-10 hours.

The invention relates to a cervical disease examining and sampling device and belongs to the technical field of medical devices. The cervical disease examining and sampling device comprises a tube body and a fixing rack, wherein an elastic cervical dilator is arranged on the left side of the tube body, a dilation positioner is arranged on the right side of the elastic cervical dilator, an anesthetization liquid bag is arranged on the right side of the dilation positioner, a conical dilation sliding sleeve is arranged on the right side of the anesthetization liquid bag, a dilation driving tubeis arranged on the right side of the conical dilation sliding sleeve, a vagina sampling tube is arranged on the outer side of the dilation driving tube, a hairbrush sampling rod is arranged in the tube body, a foldable adjusting rack is arranged on the upper side of the fixing rack, and a tube body fixing clamp seat is arranged on the upper side of the foldable adjusting rack. The cervical diseaseexamining and sampling device is simple in structure, convenient to use, capable of simultaneously sampling multiple parts such as endometrium, uterine neck inner wall and vagina and performing uterus dilatation during detection, relieves the pain of patients, can flexibly adjust a sampling hairbrush, is good in practicability and reduces the working difficulty of medical workers.

The invention relates to a novel sacculus cervical dilator, which comprises a pipe and an inflatable air sac, and is characterized in that the head end of the pipe is provided with a guide head, and the guide head is hermetically connected to the head end of the pipe; a vent hole is formed in front end of the pipe adjacent to the guide head, the inflatable air sac is hermetically connected to the front end of the pipe, and the vent hole is positioned inside the inflatable air sac; a rod insertion cavity channel and an air inflation cavity channel are arranged inside the pipe, a pipe seat is provided with a port for an air inflation cavity and a port for a rod insertion cavity, the rod insertion cavity channel is communicated with the rod insertion cavity, and the air inflation cavity channel is communicated with the air inflation cavity; the vent hole is formed in the air inflation cavity channel at the front end of the pipe, and an air valve is arranged on the port of the air inflation cavity. The novel sacculus cervical dilator is simple in structure, reasonable in design, labor saving in operation and capable of effectively pinpointing and dilating cervical with small damage to a woman.

The invention relates to the technical field of medical instruments and provides cervical dilation equipment. The cervical dilation equipment comprises a cervical dilator and a positive-negative pressure generator. The cervical dilator comprises a cervical guide-in tube, a cervix opening dilation balloon and a cervix dilation balloon. The tail end of the cervical guide-in tube is connected with aconnection seat, the front end of the cervical guide-in tube is provided with a liquid medicine outlet, and a first tube, a second tube and a third tube are arranged in the cervical guide-in tube. Theconnection seat comprises a first passage, a second passage, a third passage and a fourth passage. The first passage is communicated with the first tube, the second passage is communicated with the second tube, the third passage is communicated with an inner tube of the cervical guide-in tube, the head end of the cervical guide-in tube is provided with a drainage port, and the fourth passage is communicated with the third tube. The positive-negative pressure generator comprises a water injection mechanism, a negative-pressure suction mechanism, a medicine injection mechanism and a connectionplug. The connection plug is provided with a first insertion needle, a second insertion needle, a third insertion needle and a fourth insertion needle.

The invention belongs to dilators and particularly relates to a cervical dilator. The cervical dilator comprises a dilating head, a dilating frame, an inner core, a connecting rod and bilateral side handles which are sequentially connected mutually; the rear end of the dilating head is connected with the dilating frame; the dilating head and the dilating frame are in circular hollow structures; the dilating frame comprises an upper portion fan-shaped side, a lower portion fan-shaped side and symmetrical dilating sheets on bilateral sides. According to the cervical dilator, the dilating effect is good, the utilization method which is similar to that of original pliers and scissors is convenient, a cervix uteri is externally opened through the dilating sheets, collecting and releasing functions of opening are achieved according to the principle of a fan-shaped shed-shaped support and in combination with matching of the inner core and the dilating frame through flexible hinged supporting points installed at support joints, cervical damage caused by normal dilation is avoided.

The invention relates to a disposable cervical dilator, in particular to a disposable minimally-invasive-noninvasive-injection cervical dilator and a processing method thereof. The disposable minimally-invasive-noninvasive-injection cervical dilator comprises a dilating rod body, the dilating rod body comprises a dilating part and an assembling part, the assembling part is provided with a cavity, and the cavity extends to the dilating part and is used for injecting liquid to promote expanding of the dilating part. The disposable minimally-invasive-noninvasive-injection cervical dilator and the processing method thereof have the advantages that a dilating rod is reasonable in structural design, high in expanding efficiency and adjustable in size after expanding, and dilating is carried out as required; the cervix can be dilated to the cervix required by a line hysteroscope in transitory time (30 s), and the disposable minimally-invasive-noninvasive-injection cervical dilator is quite convenient to clinically use.

A cervical dilator for use in dilating a cervix comprises a light weight flexible tube member. The cervical dilator also comprises a syringe connected to a first end of the flexible tube member for introducing a liquid or air solution into the tube member. The cervical dilator also includes a balloon arranged over an end of the tube that is inserted into the cervix of the patient in an uninflated state. The cervical dilator also comprises at least one orifice arranged through or near an end of the flexible tube member and within the interior cavity of the balloon, such that the air or liquid inflates the balloon to a predetermined diameter.

The invention discloses an environmentally-friendly degradable disposable medical apparatus base material and a manufacture method thereof. The environmentally-friendly degradative disposable medical apparatus base material is characterized in that the degradable macromolecule main ingredient comprises 100 parts of polylactic acid base material with a molecular weight of 2000 000 and 2-5 parts of ethylene bis stearamide. The degradable base material can be used for manufacturing the disposable medical apparatuses, such as a disposable cervical dilator, a disposable uterine probe, a disposable uterine curet, a disposable vaginal dilator, a disposable intrauterine device extractor, a disposable oviduct ligating hook and plate, a disposable cervical biopsy sampler, a disposable umbilical cord clamp, a disposable tongue depressor, a disposable instrumenta cibaria mordentia, a disposable cuffed oropharyngeal airway, a disposable anaesthetic laryngoscope, a disposable rhinoscope, a disposable ear mirror, a disposable anoscope, a disposable rectum, sigmoid flexure biopsy forceps, a disposable nasopharynx biopsy forceps, a disposable syringe pipe, a disposable surgical knife handle, and a disposable oral cavity impression tray. The used disposable medical apparatus should not be burnt and can be completely degraded through the compost treatment, so that the purposes of the environmental protection and energy conservation, the aims of environment pollution avoidance, safety and health and the mankind benefit can be reached.

The invention provides a disposable cervical dilator attached with a medicine film, and a preparation method of the disposable cervical dilator with the medicine film. The cervical dilator is attached with the medicine film of local anesthetics; when the disposable cervical dilator is used, the medicine film is swollen and dissolved under body temperature; and medicines in the medicine film are released out, and are absorbed by a cervical mucous membrane, so that pain of patients is relieved, and occurrences of adverse reactions are reduced. The disposable cervical dilator with the medicine film is convenient to use, and simple and feasible in preparation process; the related pharmaceutic adjuvants are all easy to purchase and are low in cost; and the disposable cervical dilator has good social and economic benefits.

The invention discloses a cervical dilator with a unilateral distraction function. The cervical dilator comprises a tube body, wherein an inner core is arranged in the tube body; a dilating rack is arranged at the top of the tube body; a dilating head is arranged at the top of the dilating rack; the bottom end of the tube body is mounted on a support; a handle is hinged to each of two sides of thebottom of the support; a press bar is arranged on each handle, the press bars located on the two sides are symmetrically inclined and hinged to the lower end of the inner core together; the upper endof the inner core is connected with the dilating rack; the dilating rack is a parallel double-rocker mechanism and comprises a driving rocker, a rack rod, a driven rocker and a side stay connecting rod, the driving rocker is of a lever structure, a power arm is a side hook structure formed by the bottom end, bulging to the lower right, of a resisting arm, a force bearing point, a fulcrum and a force application point are not located in the same straight line, and the force application point and the upper end of the inner core are connected through a live hinge. The cervical dilator is good indilating effect, outward unilateral distraction of the cervix uteri is realized by the side stay connecting rod, and cervix uteri injury caused by common dilating is avoided.

The invention relates to a disposable active cervical dilating rod which is a common appliance in contraception operation of obstetrics and gynecology department. Physical dilation and medical softening of cervix are adopted simultaneously, and dilation can be carried out rapidly once the invention is inserted into cervix. The design retains gentle slope type physical dilation from thin to thick, and a dilation section in the hollow part of the rod is provided with a capillary channel communicated with the rod chamber. The chamber is filled with filler which has good water absorption and does not react with medicine, and quantitive anesthetic is injected. A plane is fixed by a stand sealing the rod core. When the invention is used, a stand clasp is moved aside, and pressure is applied to cause medicine to exude uniformly. Then cervical mucosa anesthesia is carried out to soften the cervix, and the physical dilation is carried out rapidly. The invention is suitable for cervical dilation required in operations of obstetrics and gynecology department and family planning department, and has the advantages of rapid speed, good effect, little pain of patient, few complications, few side effects, simple and convenient operation, disposability and reduction of hospital cross infection and disinfection load. Thus the invention is a renewal product of operation instrument.

An instrument suite for making a vagina, cervix and amniotic cavity channel is used for making a channel for performing fetal intrauterine surgical treatment through a cervix natural cavity and comprises a vaginal speculum, a cervix dilator, a fetal membrane puncture outfit and a vagina, cervix and amniotic cavity combined sheath, wherein the vaginal speculum is provided with a light source for cervical dilation under direct vision; and the cervix dilator is provided with an air bag module used for improving the cervix dilation efficiency, the front end of the fetal membrane puncture outfit is provided with self-tapping threads used for accurately controlling fetal membrane puncture, and the vagina, cervix and amniotic cavity combined sheath is provided with a one-way valve and a fastening assembly used for constructing a channel penetrating through the vagina, the cervix and the amniotic cavity and meanwhile preventing amniotic fluid from flowing out, and rigid stable connection with an operating table bracket is established.

The invention discloses a uterine cervical dilator, which comprises a push rod and a liquid absorption expansion material fixed to the push rod, wherein a positioning block is arranged at the joint of the push rod and the liquid absorption expansion material. According to the uterine cervical dilator, the liquid absorption expansion material can be locally closed under the clamping action of the push rod in an ultrasonic plastic welding way, so that liquid difficultly enters into the dilator in the using process and the purpose of structural safety is achieved.

The invention relates to the technical field of medical equipment, in particular to an angle-adaptive anterior cervical dilator. An auxiliary plier body is connected with a main plier body. The plurality of supporting rods are mounted at respective working ends; the self-adaptive opening assembly is used for automatically adjusting and fixing according to the intervertebral space of a patient, and comprises a sliding adjusting part which is fixed on the main forceps body and is used for opening the main forceps body and the auxiliary forceps body in a semicircular rotating direction; the hydraulic triggering part is installed in the main clamp body and acts on the sliding adjusting part so that the main clamp body and the auxiliary clamp body can be locked after the cervical vertebra of the patient is opened. The clamping blocks are driven through the hydraulic action to lock the piston block located in the inner cavity of the clamp body, and then the main clamp body and the auxiliary clamp body fix the intervertebral space at the current opening distance; the clamping distance adjusting assembly is designed, the auxiliary supporting rod and the ratchet bar are combined with the locking block with the rack structure to fix the auxiliary supporting rod, and the fixing device has the advantages of being good in fixing effect, high in flexibility and convenient to use.

A cervical dilator including a stem comprising a partly or fully dehydrated hydrogel comprising a water-insoluble synthetic hydrophilic polymer capable of radial expansion due to absorption of water from a bodily fluid. The cervical dilator softens and ripens the cervical tissue and expands the cervical canal by a combined action of radial hydrogel stem expansion and osmotic withdrawal of water from the tissue. The osmotic withdrawal is caused by at least one osmotically active compound, such as a water-soluble salt, a polyelectrolyte, or a mixture thereof, wherein the at least one osmoticallyactive compound is dispersed in the hydrogel. The cervical dilator may also include a non-toxic plasticizer of the hydrogel, such as water.

The invention relates to a cervical disease examining and sampling device and belongs to the technical field of medical devices. The cervical disease examining and sampling device comprises a tube body and a fixing rack, wherein an elastic cervical dilator is arranged on the left side of the tube body, a dilation positioner is arranged on the right side of the elastic cervical dilator, an anesthetization liquid bag is arranged on the right side of the dilation positioner, a conical dilation sliding sleeve is arranged on the right side of the anesthetization liquid bag, a dilation driving tubeis arranged on the right side of the conical dilation sliding sleeve, a vagina sampling tube is arranged on the outer side of the dilation driving tube, a hairbrush sampling rod is arranged in the tube body, a foldable adjusting rack is arranged on the upper side of the fixing rack, and a tube body fixing clamp seat is arranged on the upper side of the foldable adjusting rack. The cervical diseaseexamining and sampling device is simple in structure, convenient to use, capable of simultaneously sampling multiple parts such as endometrium, uterine neck inner wall and vagina and performing uterus dilatation during detection, relieves the pain of patients, can flexibly adjust a sampling hairbrush, is good in practicability and reduces the working difficulty of medical workers.

A cervical dilator including a stem comprising a partly or fully dehydrated hydrogel comprising a water-insoluble synthetic hydrophilic polymer capable of radial expansion due to absorption of water from a bodily fluid. The cervical dilator softens and ripens the cervical tissue and expands the cervical canal by a combined action of radial hydrogel stem expansion and osmotic withdrawal of water from the tissue. The osmotic withdrawal is caused by at least one osmotically active compound, such as a water-soluble salt, a polyelectrolyte, or a mixture thereof, wherein the at least one osmotically active compound is dispersed in the hydrogel. The cervical dilator may also include a non-toxic plasticizer of the hydrogel, such as water.

The invention provides a clinical air bag type cervical dilator with a protection function for obstetrics and gynecology department and relates to the technical field of air bag type cervical dilators. The clinical air bag type cervical dilator with a protection function for obstetrics and gynecology department comprises a fixing frame, two oppositely-arranged distraction plates are arranged on a front side of the fixing frame, a first lead screw is arranged in the fixing frame, and the first lead screw is rotationally connected with an inner wall of the fixing frame. In the clinical air bag type cervical dilator with a protection function for obstetrics and gynecology department, a push plate is pushed by a pushing plate to move in a connecting box, gas in the connecting box is injected into an air bag through a connecting pipe, a connecting pipe has telescopic elasticity, the air bag is expanded, a patient is protected when making contact with the air bag, after detection is completed, when connecting frames move inwards, placing plates rotate reversely, the placing plates are retracted into the distraction plates and collected in the distraction plates, and adhesive liquid is prevented from being brought out when the placing plates are in contact with an interior of a patient.

The invention discloses a cervical dilator for gynecological operation. The cervical dilator for gynecological operation comprises a mounting cylinder, a dilating plate is arranged on a left side of the mounting cylinder, a mounting assembly is arranged on a right side of the dilating plate, the dilating plate is arranged on the left side of the mounting cylinder through the mounting assembly, a fixing assembly is arranged on a right side of the mounting assembly, a mounting plate is fixedly arranged on aright end of an inner side of the mounting cylinder and a screw rod hole is arranged inthe inner side of the mounting plate. The mounting assembly is arranged, the dilating plate can be quickly disassembled and assembled, the fixing assembly is arranged, an inserting plate in the mounting assembly can be stably fixed to an inner side of an inserting groove, the dilating plate is prevented from shaking after mounting,when the the dilating plateneeds to be disassembled, fixing screws only need to be taken out from interiors of threaded grooves and threaded holes, the inserting plate can be pulled out from the inner side of the inserting groove, mounting blocks are taken out from interiors of mounting grooves, and therefore the dilating plate can be quickly disassembled and conveniently replaced and cleaned.

The invention discloses an auxiliary cervical dilator, which comprises an inner guiding tube and an outer guiding tube. A cervical dilation balloon is arranged on the outer side of the outer guiding tube near its head end, and a vulva limiting balloon is arranged near the tail end. The outer guiding tube There are two water injection channels connected to the cervical dilation balloon and the vulva limit balloon in the tube wall of the outer guide tube, and the water injection port I and the water injection port II connected with the two water injection channels are provided on the tube wall of the outer guide tube. A uterine-limiting balloon is provided on the outside of the inner guide tube close to its head end, and a water injection port III connected with the uterine-limiting balloon is provided at the tail end of the inner guide tube through the water injection channel set in the tube wall. The tail end protrudes from the outer guide tube and is connected to the drawing plate; the guide tube is provided with a positioning pin for fixing the position of the inner guide tube. The invention can accurately restrict the cervical dilatation balloon to the cervix, effectively promote the dilation of the cervix, and can properly dilate the internal os of the cervix without damaging the cervix, and is safe and convenient to use.

The invention provides a combined type cervical dilator which structurally comprises a hand-held tube, a dilation balloon and a guide bulb, wherein the hand-held tube, the dilation balloon and the guide bulb are mutually spliced into a shape like a string of candied haws; the upper end of the hand-held tube, the upper end of the dilation balloon and the upper end of the guide bulb are respectively provided with a constricted tube; the constricted tube at the upper end of the guide bulb is spliced with the lower end of the dilation balloon, and the constricted tube at the upper end of the dilation balloon is spliced with the lower end of the hand-held tube; the dilation balloon is composed of a rigid tube, an annular capsule and an inflation tube; the upper end of the rigid tube is provided with the constricted tube; the annular capsule is attached to the outer circle of the rigid tube; the middle of the rigid tube is provided with an air admission nozzle; one end of the air admission nozzle is connected with the inflation tube, and the other end is communicated with the cavity of the annular capsule; the inflation tube is extended outwards through the hand-held tube; and the outerwall of the hand-held tube is provided with graduation marks.

A cervical dilator comprises a stem comprising a partially or completely dehydrated hydrogel comprising a water-insoluble synthetic hydrophilic polymer capable of radial expansion due to absorption of water from bodily fluids. The cervical dilator softens and matures cervical tissue and dilates the cervical canal through a combination of radial hydrogel stem expansion and osmotic absorption of water from the tissue. The osmotic absorption is caused by at least one osmotically active compound, such as a water-soluble salt, polyelectrolyte, or mixtures thereof, dispersed within the hydrogel. The cervical dilator may also include a non-toxic plasticizer for the hydrogel, such as water.

The invention provides a disposable cervical dilator attached with a medicine film, and a preparation method of the disposable cervical dilator with the medicine film. The cervical dilator is attached with the medicine film of local anesthetics; when the disposable cervical dilator is used, the medicine film is swollen and dissolved under body temperature; and medicines in the medicine film are released out, and are absorbed by a cervical mucous membrane, so that pain of patients is relieved, and occurrences of adverse reactions are reduced. The disposable cervical dilator with the medicine film is convenient to use, and simple and feasible in preparation process; the related pharmaceutic adjuvants are all easy to purchase and are low in cost; and the disposable cervical dilator has good social and economic benefits.

The invention relates to the technical field of medical gynecological instruments, in particular to a memory alloy cervical dilator. A memory alloy cervical dilator is composed of a handle and a dilating rod, the dilating rod is divided into an end, a connecting section and a dilating section, the dilating section is located between the end and the connecting section, and the connecting section is connected with the handle; the expansion section is formed by splicing a plurality of expansion spokes, and the plurality of expansion spokes are arranged in parallel to form a supporting expansion cage frame; an expansion spoke of the expansion rod is made of TiNi memory alloy, the expansion spoke is in a straight rod shape in a non-deformation state, and the expansion spoke is in an arched bent shape in a deformation state; and the plurality of expansion spokes deform to form an ellipsoid supporting expansion cage frame. Compared with a traditional cervix dilating rod, the memory alloy cervix dilator is simpler and more convenient to use, the dilating spoke is in a straight state before being used, the memory alloy cervix dilator can be easily placed into an undilated cervix canal, and in the uterus dilating process, the memory alloy cervix dilator can be used for dilating the cervix. The expansion spoke gradually and slowly expands and deforms along the radial outer side of the expansion rod under the action of the human body temperature of about 37 DEG C.

The invention discloses a cervical dilation rod capable of controlling medicine release, and relates to the technical field of medical instruments, the cervical dilation rod comprises an insertion piece, one end of the insertion piece is fixedly connected with a connecting thread sleeve, one end of the connecting thread sleeve is fixedly connected with a limiting plate, and the interior of the connecting thread sleeve is in threaded connection with a driving rod; a plurality of flexible arc-shaped petals are installed at the end, away from the connecting thread sleeve, of the inserting piece, a liquid supplementing piece is fixedly connected to one side of the interior of the inserting piece, one end of the liquid supplementing piece communicates with the flexible arc-shaped petals, the driving rod is manually rotated, so that components in the driving rod operate, one end of the driving rod extrudes the flexible arc-shaped petals from inside to outside, and the flexible arc-shaped petals are fixed to the end, away from the connecting thread sleeve, of the inserting piece. The extrusion speed is stable, the multiple flexible arc-shaped flaps are expanded to achieve radial expansion, a doctor can control the expansion diameter in real time according to the hand feeling, follow-up operation treatment of the doctor is facilitated, the doctor becomes a main guide of the expansion process through pure mechanical transmission, accurate control can be conducted according to the real-time hand feeling, and the operation safety is remarkably improved.

The invention provides a genital tract dilating device for artificial abortion and induced labor. A cervical dilator is made from memory alloy wires. The cervical dilator is put in a cervix uteri of apatient at a low-temperature phase, liquid is injected in a rubber hose, the deformation of the memory ally wires is controlled, and the memory ally wires deform to be in the shape of a helical spring at a high-temperature phase, so that the cervix uteri is dilated. Due to the deformation characteristics of the memory alloy wires, the cervix uteri of the patient is slowly dilated in the deformation course, so that damage to the cervix uteri is avoided; and besides, a water sac at the end of the cervix uteri dilator is used for performing mechanical irritation, and uterine contraction is induced, so that the induced labor time is shortened, and the operation risk is reduced.

The utility model discloses a cervical dilator split charging assistor which comprises a box body formed by mutually hinging an upper cover and a lower cover, a plurality of groups of isolation plates are arranged in the lower cover in a transversely and longitudinally staggered mode to form a plurality of containing cavities, and an observation window is arranged on the side portion of the lower cover. The cervical dilator split charging assist device is arranged corresponding to the box body structure, and the cervical dilators of different models can be conveniently classified and stored by matching with the arrangement of the containing cavities of the cervical dilator split charging assist device. Meanwhile, a specific model printed on the cervical dilator can be conveniently observed through the arrangement of an observation window on the side portion of the lower cover, and the accuracy of the cervical dilator in the taking process can be further improved through the arrangement of corresponding scale marks on the observation window; when the model printed on the cervical dilator is not clear in the long-time use process, the model can be directly compared with the corresponding scale marks on the observation window in the earlier use stage.

The present invention relates to the field of medical device technology, and in particular to an anti-blocking and anti-adhesion intrauterine balloon device. The device comprises a double-lumen catheter, wherein the upper end surface of the double-lumen catheter is wrapped with a balloon, the air cavity outlet end of the double-lumen catheter is connected to the inner cavity of the balloon, and the injection cavity outlet end of the double-lumen catheter is exposed on the outer surface of the balloon; a cervical dilator is sheathed on the surface of the double-lumen catheter, and the outer surface of one side of the double-lumen catheter is fixedly connected to the inner surface of the cervical dilator; the lower end of the cervical dilator is provided with multiple skirts along the circumferential direction, and the multiple skirts can overlap the surface of the double-lumen catheter to shield the lower end of the cervical dilator. The present invention can prevent adhesions in the uterine cavity after curettage by expanding the uterine cavity with a balloon; the present invention expands the cervical opening with the cervical dilator, and then seals the lower end of the cervical dilator with the skirt, preventing pathogens in the vagina from entering the uterine cavity. When blood clots flow out of the cervical dilator, the dilator can expand to allow normal excretion.