120 results about "Uterine cavity" patented technology

A method of uterine hemostasis involves inserting a suction line of a postpartum hemorrhage mitigation device through a cesarian incision into the uterine cavity, guiding the suction line through the cervix and into the vagina, positioning an anchoring mechanism of the device adjacent the internal cervical OS of the uterine cavity, closing the cesarian incision to enclose the suction line within the uterine cavity, and connecting the suction line to a negative pressure source that introduces negative pressure to the uterine cavity via the suction line, thereby causing contraction of the uterus and evacuation of fluid from the uterus via the suction line extension. Upon completion of a treatment period, the negative pressure source is disconnected, and the suction line and anchoring mechanism are extracted from the uterus through the cervical canal and the vagina.

The utility model provides an artificial insemination tube assembly, which belongs to the technical field of insemination tubes and comprises a storage tube, a push rod and an annular air bag, the push rod and the annular air bag are arranged on the storage tube, a feeding tube is arranged on the side wall of one end of the storage tube, and a seminiferous duct is mounted at one end of the storage tube. According to the insemination device, the annular air bag arranged on the outer side of the seminiferous duct expands while insemination is conducted, it is guaranteed that the device is fixed, meanwhile, the situation that semen flows back after insemination is effectively prevented, and then the probability of pregnancy is improved, meanwhile, two one-way valves are installed on the two sides of the annular air bag, and after the annular air bag completely abuts against the inner wall of a uterine cavity, the two one-way valves are closed. When the device is taken out, the other one-way valve is forced to be opened and closed to supplement air into the annular air bag from the outside in the subsequent process of taking out the device, so that the push plug is convenient to move to the initial position, and the safety of the device is improved. The subsequent addition and use of the seminal fluid are convenient.

The utility model relates to the technical field of medical devices, in particular to a uterine cavity indwelling drainage device which comprises a sacculus, a drainage tube, a filling tube and a drainage bag, the sacculus is roughly of an isosceles triangle structure with the wide upper portion and the narrow lower portion, and a conical through hole with the outer diameter gradually decreasing from top to bottom is formed in the middle of the sacculus. The top end of the drainage tube is communicated with the bottom end of the conical through hole, and the bottom end of the drainage tube is communicated with an input port in the middle of the top end of the drainage bag; the balloon is of a hollow structure, and a filling opening communicated with the top end of the filling pipe is formed in the left side of the bottom of the balloon. According to the utility model, the unfilled balloon and the drainage tube are fed into the uterine cavity, and then the balloon is filled through the filling tube to enable the balloon to be wider than the uterine cavity opening, so that the drainage device can be retained in the uterine cavity, and hydrops in the uterine cavity can be drained into the drainage bag through the conical through hole in the middle of the balloon and the drainage tube.

1. Name of the product in this design: Disposable hysteroscope. 2. Purpose of this design: To observe the morphology and lesions within the uterine cavity and to perform surgical procedures. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

An everting balloon system is disclosed that can be used for the placement of an IUD within the uterine cavity of a female patient. The everting balloon system with IUD can be used to access a uterine cavity at specific locations in the fundus. A one-handed IUD delivery system for placement with an everting catheter is disclosed. An IUD loading system for placement within an everting catheter is disclosed. The everting catheter with an IUD can simplify the process of IUD placement within the uterine cavity.

This invention provides a transcervical access system for moving fluids transcervically. [Solution] The transcervical access system 100 is effective in transferring a wide range of fluids into the uterine cavity, including the delivery of a hydrogel precursor, saline solution, and imaging fluid. The transcervical access system 100 is also effective in removing fluids, such as residual bodily fluids, residual fluids from procedures, or tissue from the uterine cavity. The transcervical access system 100 includes a flow limiter, such as an outflow limiter 106 and / or a cervical plug. A method of using the transcervical access system 100 involves using the transcervical access system 100 to transcervically access the uterine cavity and to install the hydrogel. The transcervical access system 100 and related methods are useful in preventing adhesions after intrauterine procedures by providing a biodegradable hydrogel within the uterine cavity, including the cervix.

The utility model discloses a multifunctional drainage tube fixing application, which relates to the field of medical instruments and comprises an application base layer, a fixing strip is arranged on the application base layer, two hook-and-loop fasteners are arranged on the fixing strip at intervals, the two hook-and-loop fasteners are in different colors, and the two hook-and-loop fasteners limit a uterine cavity drainage tube and a urinary catheter respectively. The uterine cavity drainage tube and the urinary catheter can be effectively distinguished, the situation that mistakes are made is avoided, the problem of cross infection is avoided, meanwhile, the catheter can be fixed, the traction pain during turning over and moving is reduced, and the comfort level of a patient is improved.

The utility model belongs to the technical field of uterine cavity hemostasis for gynecologic surgery, and discloses a uterine cavity hemostat for gynecologic surgery, which comprises a hemostat body, a needle tube and a fixing mechanism, the hemostat body comprises a valve body, a water injection tube and a balloon, one end of the valve body is connected with the end of the needle tube, and the other end of the valve body is connected with the water injection tube. A balloon is installed on the periphery of one end of the water injection pipe, a first connecting block is installed on one side of the needle tube, one side of the first connecting block is connected with a connecting rope, the other end of the connecting rope is connected with a second connecting block, the second connecting block is connected with one side of the fixing mechanism, and the balloon comprises a surface layer and an airtight layer. The device is simple and reasonable in structure, novel in design and easy to operate, and the situation that due to the fact that the needle tube pressing speed of an operator is too high, the normal saline injection pressure is increased suddenly, the valve body pops up accidentally from the connecting position of the needle tube end, and then timely treatment on a patient is affected can be effectively avoided.

The present application relates to the technical field of medical devices, and particularly relates to a uterine cavity tissue cutting biopsy device facilitating sampling, comprising a cutter body and a negative pressure sampling bottle detachably connected with the cutter body, wherein the sample cut by the cutter body enters the negative pressure sampling bottle based on negative pressure, and the negative pressure sampling bottle is provided with a negative pressure regulator. The uterine cavity tissue cutting biopsy device facilitating sampling can synchronize the cutting and sample collection, and the sampling bottle can be quickly taken down without disconnecting the negative pressure device, and the negative pressure can be quickly drawn when needed, so that the uterine cavity tissue cutting biopsy device facilitating sampling can quickly reach the required negative pressure value, and has the advantages of simple structure, low cost, no noise, no vibration, and convenient operation for doctors.

The invention discloses a novel clinical uterine curettage device for gynaecology and obstetrics, and relates to the technical field of uterine curettage devices, the novel clinical uterine curettage device for gynaecology and obstetrics comprises a handle, a length adjusting mechanism, an angle adjusting mechanism and a rotating mechanism are arranged on the inner side of the handle, a movable cylinder is arranged on the inner surface of the length adjusting mechanism, and a deformation mechanism is arranged at one end of the movable cylinder. According to the novel clinical uterine curettage device for the obstetrics and gynecology department, by arranging the deformation mechanism, the opening amplitude and shape of the deformable curettage ring can be precisely adjusted, the deformable curettage ring is made to adapt to the sizes and shape differences of uterine cavities of different patients, compared with a fixed arc-shaped structure, friction and extrusion generated when the curettage assembly enters the uterine cavity are reduced, the operation entering difficulty is lowered, and the pain feeling of the patients is reduced; the problems that most scraping assemblies of an existing clinically-used uterine curettage device are of a fixed-shape arc-shaped structure, the entering difficulty is increased, the operation time is prolonged, high pain can be brought to a patient, even complications such as uterine cavity mucosa injury can be possibly caused, and postoperative recovery of the patient is affected are solved.

The invention relates to the field of intrauterine devices, and discloses a degradable intrauterine device which comprises a main rod, an automatic anchoring and degrading mechanism is arranged outside the main rod, a tail line mechanism is arranged at the rear end of the main rod, a developing and pre-breaking mechanism is arranged in the main rod, the automatic anchoring and degrading mechanism comprises an adaptive coating, and the adaptive coating is arranged in the main rod. The inner portion of the adaptive coating is fixedly connected to the outer portion of the main rod, the front end of the main rod is connected with two side arms through an adjusting assembly, the outer portions of the side arms are fixedly connected with flexible soft anchors, the adjusting assembly comprises a fixing ring, and the outer portion of the fixing ring is fixedly connected to the front end of the main rod. After the intrauterine device enters a uterine cavity, the shape memory polymer of the side arm receives a body temperature signal and is synchronously, slowly and softly unfolded into a T shape under the guidance of the fixing ring and the spherical hinge, and the flexible soft anchor at the tail end lightly abuts against the uterine base; the fixing ring and the spherical hinge enable the intrauterine device to enter a'dynamic adaptation mode ', and uterine contraction pressure is buffered.

The application relates to the technical field of postpartum hemostasis, and discloses a gynecological hemostasis device which comprises an extension flow guide mechanism and an inflatable compression hemostasis mechanism. One end of the extension flow guide mechanism away from the inflatable compression hemostasis mechanism is provided with an electric pressure relief mechanism, and both sides of the electric pressure relief mechanism are provided with mechanical pressure relief mechanisms. The gynecological hemostasis device can monitor and feedback control the internal air pressure in real time by means of the electric pressure relief mechanism during use. When the uterus contracts and extrudes the internal compression air bag to cause the air pressure to rise, the electric pressure relief mechanism can be quickly started to release pressure to maintain pressure stability. Meanwhile, the two sets of mechanical pressure relief mechanisms arranged in parallel can automatically work when the electric pressure relief mechanism fails or responds with delay, forming a double-redundancy protection mechanism, so that the compression effect of the device on the uterine cavity during the uterine contraction process is always within the preset safe pressure range, and the risk of excessive local pressure in the uterus is effectively prevented.

The invention relates to the technical field of uterus image segmentation, in particular to a woman uterus disease auxiliary diagnosis and evaluation system based on magnetic resonance imaging. After a uterus image of a patient is obtained and a uterine cavity area is positioned, clustering clusters are divided according to pixel gray values by using a clustering algorithm to correspond to different uterus areas. And generating an endometrial region descriptor and screening out an endometrial region by combining the pixel number distribution of each region, the gray features and the shape difference between the endometrial region descriptor and the uterine cavity. Performing gray scale segmentation on the region to extract a high-signal region, and calculating an internal descriptor according to internal edge distribution and morphological characteristics of the high-signal region; meanwhile, an external descriptor is generated based on edge pixel neighborhood gray scale difference. And finally fusing internal and external descriptors to realize auxiliary diagnosis of uterine diseases. According to the method, the uterus image with obvious uterine cancer staging development tendency can be screened out, and a more accurate diagnosis effect is provided for related personnel.

This invention belongs to the field of biomaterials technology and discloses a two-component in-situ crosslinking agent, a biodegradable two-component hydrogel, and their applications. The two-component in-situ crosslinking agent disclosed in this invention has injectability and rapid gelation properties. The hydrogel formed after crosslinking has a low self-swelling rate, good elasticity, and is not easily crushed. It also has a suitable metal ion slow-release cycle and degradation cycle for preventing tissue adhesion or tissue repair. It is especially suitable for high-risk areas of postoperative adhesion such as the uterine cavity, abdominal cavity, and joints, and can also promote tissue regeneration.

The gynecological uterine cavity sampler comprises a sampling tube and a sampling hole formed in the end part of the sampling tube, and further comprises a piston, and the piston is arranged in the sampling tube; one end of the push-pull rod is positioned in the sampling tube and is fixed with the piston; the plugging assembly is arranged on the sampling tube, the plugging assembly is used for plugging the sampling hole, the sampling tube is moved into the uterine cavity, the plugging assembly is used for removing plugging, and the sampling hole is temporarily plugged through the sliding sleeve, so that when a medical worker uses the sampling tube to penetrate through the vagina of a patient, the plugging assembly is used for plugging the sampling hole and moving the sampling tube into the uterine cavity; the condition that secreta in the vagina enters the sampling tube from the sampling hole in the uterine cavity penetrating process is avoided, then the sampling purity is improved, the detection accuracy is improved, when the sampling hole is located in the uterine cavity of a patient, the handle is pulled to drive the arc-shaped piece to move, and therefore the sliding sleeve is driven to move to open the sampling hole, and the sampling tube is closed. And meanwhile, sampling operation is performed.

The utility model relates to the technical field of medical instruments, in particular to a uterine cavity perfusion device which comprises an injection cylinder, a connecting pipe is arranged on the injection cylinder in a communicated mode, a piston is connected in the injection cylinder in an abutting mode, a moving rod is fixedly connected to the piston and fixed through a fixing mechanism, a catheter is arranged on the connecting pipe in a communicated mode, and the moving rod is fixed through a fixing mechanism. A connecting shell is arranged on the guide pipe in a communicating mode, a movable plug is connected in the connecting shell in an abutting mode, the movable plug moves through a moving mechanism, and a valve is arranged on the guide pipe. According to the utility model, the situation that liquid exists in the connecting pipe, so that the medicine quantity is remained is avoided.

The application discloses a uterine cavity hemostatic forceps and belongs to the technical field of hemostatic forceps. The hemostatic forceps comprises telescopic forceps handles, one end of the forceps handle is fixedly connected with a half-ring sleeve, a half-ring handle is slidably connected in the half-ring sleeve, one end of the half-ring handle is fixedly connected with a forceps head, the other end of the half-ring handle is threadedly connected with a fastener, the fastener is slidably matched with the half-ring sleeve, two connecting rings are fixedly connected in the half-ring sleeve, and a positioning pin is rotatably connected between the two connecting rings. The half-ring handle with the forceps head can be adjusted at multiple angles through the rotation of the half-ring sleeve and the half-ring handle, the angle use requirement of the forceps head in different states is met, and the use diversity of the hemostatic forceps structure is improved.

The invention relates to the field of medical instruments, in particular to a telescopic uterine cavity endoscope which comprises an insertion mechanism, a driving mechanism and a position sensing mechanism, the insertion mechanism comprises a lens assembly and an intubation tube assembly, the lens assembly is installed at one end of the intubation tube assembly, and the intubation tube assembly comprises an inner tube and an outer tube slidably arranged on the inner tube in a sleeving mode; the driving mechanism is used for driving the outer tube to slide back and forth on the inner tube so that the lens assembly can be exposed and hidden, and the position sensing mechanism is used for sensing the position of the driving mechanism and judging the state of the lens assembly. The problems that according to an existing uterine cavity endoscope, a plug part with the large outer diameter size possibly scratches the cervix uteri opening to form secondary damage, an insertion channel of a working instrument is narrowed inevitably by reducing the radial size of an insertion tube, the operation difficulty is increased due to the narrow insertion channel of the working instrument, and the operation efficiency is reduced are at least solved.

The utility model discloses a corrosion-resistant water collecting tray for a floor wet area, which comprises a tray body made of corrosion-resistant materials, the tray body is formed by mutually splicing a plurality of sub-tray structural members, and a detachable connecting member is connected between any two adjacent sub-tray structural members; the sub-tray structural member is arranged to be in a concave basin cavity shape, and an anti-condensation protective layer is arranged on the sub-tray structural member. The tray body made of the corrosion-resistant material is used as the waterproof structure layer, so that the influence of wet expansion and dry shrinkage of a wood structure on the waterproof layer is avoided, the service life of the waterproof layer is prolonged, and the construction efficiency of the waterproof layer is also improved.

The intrauterine time-sharing dosing device comprises a catheter, the catheter is provided with a containing space, and a first channel and a second channel which are parallel in the axial direction are arranged in the containing space; the first balloon is arranged at one end of the catheter; the second balloon is arranged at the other end of the catheter; the joint is arranged at one end, close to the second balloon, of the catheter; the inflation assembly is communicated with the second balloon through the second channel; the propelling assembly is communicated with the first balloon through the first channel; when the catheter is inserted into a uterine cavity, gas is conveyed to the second balloon through the second channel by the inflating assembly, so that the second balloon is expanded to block a cervical orifice so as to prevent medicine from flowing out of a body, and then liquid medicine enters the first balloon through the first channel by pushing the propelling assembly so as to prevent the medicine from flowing out of the body. The first balloon expands under the action of liquid medicine pressure and is attached to the inner wall of the uterine cavity, so that time-phased, small-amount and multi-time accurate conveying of medicine is achieved, and the medicine is conveyed to a specific part in the uterine cavity by controlling the amount of the medicine entering the uterine cavity.

The application provides an injectable hydrogel for endometrial repair and / or prevention of adhesion of uterine cavity and a preparation method and application thereof, and belongs to the technical field of biomedical materials. The injectable hydrogel is composed of a base gel and a decellularized matrix distributed in the base gel; the base gel is composed of a cross-linked carboxymethyl chitosan gel and a carbomer gel; the base gel has an interpenetrating or semi-interpenetrating double network structure; and the cross-linked carboxymethyl chitosan gel is a chemical cross-linked carboxymethyl chitosan gel. In the application, the injectable hydrogel forms a base gel with an interpenetrating or semi-interpenetrating double network structure by using a cross-linked carboxymethyl chitosan gel and a carbomer gel, and is compounded with a decellularized matrix, so that the injectable hydrogel has high elasticity and high adhesion, can effectively prevent adhesion and repair damaged tissues, has a long action time, and has good biocompatibility.

Hysteroscopic system includes a hysteroscope having a main body coupled to an extension portion. The extension portion may be a shaft configured to extend transcervically to a patient's uterine cavity. First, second, and third channels extend from the main body to a distal end of the extension portion. A fluid source is coupleable to a proximal end of the first channel, and a pressure sensor is coupleable to a proximal end of the second channel. A tissue resecting probe is configured for introduction through the third channel. At least one resistance feature is included which is configured to provide a selected level of resistance to axial sliding of the probe through the third channel while permitting rotation of the probe within the third channel.

The invention relates to the technical field of biomedicine, in particular to a group of key biomarkers for predicting endometrial receptivity, including specific microbial strains and metabolites, and a prediction model containing the markers. The method comprises the following steps: collecting a uterine cavity lavage fluid sample, carrying out 16S rRNA gene sequencing and non-targeted metabonomics analysis, and screening out eight key microbial strains and eight key metabolites; based on the markers, the following diagnostic models are constructed: a model only based on eight microbial strains; a model based on only eight metabolites; a combined microorganism and metabolite model; and a clinical data model is further combined. According to the method, a microbiome and metabolome multi-omics conjoint analysis strategy is adopted, strict screening is carried out in combination with LASSO regression, SVM-RFE and other machine learning algorithms, and the obtained biomarker is high in specificity. The constructed model, especially a combined model, shows high prediction precision and good calibration degree through verification of various curves.

The application belongs to the technical field of medical devices, and particularly relates to a uterine cavity anchoring spike balloon, which comprises a balloon, a connecting pipe, a flow guide pipe and an outer wrapping pipe. The balloon is in communication with the connecting pipe, and the connecting pipe is in communication with an external water injection device. The flow guide pipe is arranged in the balloon and the end of the flow guide pipe extends out of the balloon. The end of the flow guide pipe extending out of the balloon is provided with a flow guide opening. The outer wrapping pipe is wrapped outside the connecting pipe and the flow guide pipe. The balloon outer wall is provided with a plurality of spikes. When the balloon is inflated, the included angle between the center line of the spike and the balloon outer wall is 45-55 degrees, and the top end of the spike is arranged towards the cervical orifice. The application can avoid balloon slippage and the risk of infection caused by multiple implantations. Meanwhile, the flow guide pipe is prevented from being blocked.

This utility model discloses a disposable uterine manipulator, including a manipulator body, a manipulator rod, a guide rod inserted inside the manipulator rod, and an expansion airbag (annular airbag) surrounding the manipulator rod. A fixing airbag for uterine manipulation is connected to the guide rod. The fixing airbag includes multiple directional expansion airbags arranged circumferentially around the guide rod. A limiting strip is provided on the inner wall of the directional expansion airbag along the length of the guide rod, and a limiting portion is provided on the limiting strip. The expansion airbag and the fixing airbag are respectively connected to an air pump via gas pipelines. By inflating the expansion airbag, it can adapt to vaginas of different sizes and shapes, and also perfectly and evenly act on the entire fornix, providing a favorable environment for subsequent uterine manipulation. Simultaneously, inflating the fixing airbag fills the entire uterine cavity, effectively meeting the needs of uterine manipulation. Furthermore, the expansion airbag and the fixing airbag can be used as disposable consumables, effectively reducing the risk of cross-infection from surgical instruments.

The utility model relates to the technical field of medical instruments, in particular to a combined contraceptive ring. According to the combined contraceptive ring, a contraceptive mechanism, a positioning mechanism and a pushing mechanism used for pushing the positioning mechanism and the contraceptive mechanism are movably connected in a guide sleeve, the contraceptive mechanism comprises an anti-falling wire rope penetrating through the positioning mechanism, a barb mechanism is arranged at the end of the anti-falling wire rope, the barb mechanism comprises a plurality of barbs, and the barbs are arranged in the guide sleeve. And the barbs are condensed and bound in the positioning mechanism, so that the barbs do not collide with the uterine cavity due to the contraction activity of the uterine cavity, and the comfort and the stability of the novel contraceptive ring are improved.

The utility model discloses a uterine cavity balloon device. The uterine cavity balloon device comprises an inner catheter, an outer catheter arranged on the periphery of the inner catheter in a sleeving mode, a first balloon and an anti-disengaging ring, a first communication cavity is formed in the outer catheter, the first balloon is connected with the outer catheter, a first expansion cavity is formed in the first balloon and communicated with the first communication cavity, and the anti-disengaging ring is provided with an inflation inlet and is of a hollow structure. The volume of the anti-falling ring is in positive correlation with the volume of air in the anti-falling ring; the anti-falling ring is arranged on the periphery of the uterine cavity balloon device, and the size of the anti-falling ring is increased along with the increase of the internal air amount, so that the anti-falling ring can extrude the inner wall of the vagina to fix the uterine cavity balloon device, and the uterine cavity balloon device is prevented from slipping or shifting.

The application belongs to the technical field of medical devices, and specifically provides a uterine curettage device for gynaecology and obstetrics, which comprises a supporting pipe, one end of the supporting pipe is provided with a flexible plug, the end of the supporting pipe away from the flexible plug is provided with a handle type operating mechanism, an adjustable scraping mechanism is slidably arranged in the supporting pipe, the adjustable scraping mechanism is installed on the upper part of the handle type operating mechanism, and the end of the adjustable scraping mechanism away from the supporting pipe is installed with a collecting mechanism; the uterine curettage device for gynaecology and obstetrics can conveniently adjust the penetration depth of the operating pipe and effectively avoid repeated and excessive scraping, a hidden cutting knife is adopted, the endometrial state is protected, the uterus is prevented from being perforated, and the pain of the patient is reduced; in addition, the uterine cavity tissue is collected in a negative pressure adsorption mode, the collecting chamber is divided into multiple convertible chambers, the uterine cavity samples at different positions can be conveniently sampled, and the accuracy of pathological diagnosis is improved.

The application provides an amniotic membrane biological composite material and a preparation method and application thereof, and the composite material comprises amniotic membrane microcarriers, mesenchymal stem cells and a polypeptide hydrogel, wherein the amniotic membrane microcarriers are 3D load type three-dimensional structures, the amniotic membrane microcarriers are loaded with the mesenchymal stem cells, and the mesenchymal stem cells are mixed and cultured with a polypeptide solution at a ratio of 1:2-1:4 to obtain a mesenchymal stem cell-amniotic membrane microcarrier-polypeptide hydrogel biological composite material. The combination of the amniotic membrane microcarriers and the hydrogel provides three-dimensional support for stem cells, perfusion into the uterine cavity can make the cells survive for a long time, meanwhile, the microcarriers and the hydrogel have a slow-release effect on the excretion of the stem cells, and are more conducive to promoting the repair effect of the mesenchymal stem cells, and can be used for endometrial repair.

The utility model relates to the technical field of medical auxiliary instruments, in particular to a uterine cavity puncture thread hanging device which is characterized by comprising an outer sheath and a puncture needle, a cavity penetrating through the two ends of the outer sheath is formed in the outer sheath, and a limiting piece capable of adjusting the position in the length direction of the puncture needle is arranged on the puncture needle. One end of a needle point of the puncture needle can penetrate in from one end of the cavity and penetrate out from the other end of the cavity until the limiting piece abuts against the outer side of one end of the outer sheath, a needle hole allowing one end of the fixing line to penetrate through is formed in the needle point of the puncture needle, and a line knot is arranged at the other end of the fixing line. One end of the line knot of the fixing line is fixed in the muscular layer at the bottom of the uterine cavity in a puncturing mode, the contraceptive ring or the medicine ring is bound and fixed in the uterine cavity through the fixing line so as to prevent the contraceptive ring or the medicine ring from falling off, and meanwhile the bearing capacity of the fixing line can be conveniently adjusted by adjusting the size of the line knot. And the preset puncture depth of the puncture needle penetrating into the muscular layer at the bottom of the uterine cavity can be conveniently adjusted, so that the puncture depth of the puncture needle can be better controlled and grasped.