Simulation operation teaching aid for puncture ovum collection under transvaginal ultrasound guidance

Abstract

The utility model relates to the technical field of surgical operation of an in-vitro insemination-embryo transplantation technology, in particular to a transvaginal ultrasound-guided puncture ovum collection simulation surgical teaching aid, which comprises a lower belly pelvic cavity and perineum profiling model, a pelvic cavity model is formed on the lower belly pelvic cavity and perineum profiling model, and the lower belly pelvic cavity and perineum profiling model is provided with a transvaginal ultrasound-guided puncture ovum collection simulation surgical teaching aid. A plurality of groups of follicle cluster models can be placed in the pelvic cavity model, the residual space is filled with clear water, the follicle cluster models are grape-shaped, 4-8 follicle profiling models are bonded to form a cluster-shaped structure, the surfaces of the follicle profiling models are made of natural latex materials, the wall thickness is 0.1-0.2 mm, and the follicle profiling models are wrapped with liquid. A light red dye for simulating the color of follicular fluid is mixed in the liquid; the vagina profiling model is detachably connected with the pelvic cavity model through a vagina vault profiling model, a curved surface structure protruding towards the pelvic cavity model is detachably arranged at the joint of the pelvic cavity model and the vagina profiling model, and the analog simulation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical operation of in vitro fertilization-embryo transplantation technology, in particular to a teaching aid for simulating surgical operation of puncturing and extracting eggs under the guidance of transvaginal ultrasound. Background Art

[0002] In vitro fertilization-embryo transfer, commonly known as "test tube baby" technology, is the most commonly used assisted reproductive method in modern times. The clinical operation includes multiple technical links such as ovulation induction, egg retrieval, fertilization, embryo culture in vitro and embryo transplantation. Among them, transvaginal ultrasound-guided puncture and egg retrieval is the most complex, traumatic and likely to cause the most complications in the entire IVF-ET treatment process.

[0003] At present, the training of young doctors for puncture and egg retrieval in most reproductive centers is still based on the traditional surgical training form of observation-explanation-teaching operation. However, the puncture and egg retrieval process is an ultrasound-guided minimally invasive interventional operation. The difficulty lies in the exposure of the largest section of the follicle, the design of the appropriate puncture path, and the stability of the operator's hand when aspirating follicular fluid. These trainings are very dependent on the operator's experience and feel, and it is difficult to accumulate necessary experience through simple explanations; if beginners are not familiar with the process when performing real human operations, they may artificially prolong the operation time and cause discomfort to the patient, or even the unreasonable follicle puncture position, affecting the egg retrieval rate and causing unnecessary ovarian damage; the egg retrieval process often involves women's private parts. With the tension between doctors and patients and the enhancement of patients' awareness of self-privacy protection in recent years, there are also risks of medical disputes when carrying out actual operations and training on patients.

[0004] After searching, it was found that there is currently no transvaginal puncture egg retrieval model on the market that has good simulation effects and is economical. The main reasons are that the imaging effect of follicles under ultrasound is not ideal, the simulation effect of follicular fluid aspiration is poor, the model design is too complicated, and the cost of replacing consumables is high, which is not conducive to the teaching process.

[0005] Therefore, the current IVF-ET egg retrieval teaching process urgently needs a simulation teaching aid that can simulate the core operation links of the transvaginal ultrasound-guided puncture egg retrieval surgery. Through replaceable consumable modules, it can achieve recycling in simulation teaching at a low cost, and allow the learners to master the basic operating principles of the operation, familiarize themselves with the key points, key points and difficulties of the operation, and improve the training experience and teaching effect. Utility Model Content

[0006] The purpose of the utility model is to provide a teaching aid for simulating egg retrieval surgery under transvaginal ultrasound guidance, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A teaching aid for simulating transvaginal ultrasound-guided puncture and egg retrieval surgery, comprising:

[0009] A lower abdominal pelvic cavity and perineum profiling model, wherein a pelvic cavity model is formed on the lower abdominal pelvic cavity and perineum profiling model, and a plurality of follicle cluster models can be placed in the pelvic cavity model;

[0010] The vaginal profiling model is detachably connected to the pelvic cavity model.

[0011] As a further solution of the utility model: the follicle cluster model is grape-shaped and includes a plurality of follicle-shaped models, and 4 to 8 follicle-shaped models are bonded to form the follicle cluster model.

[0012] As a further solution of the utility model: the surface of the follicle-shaped model is made of natural latex material, with a wall thickness of 0.1 to 0.2 mm, and is wrapped with liquid.

[0013] As a further solution of the utility model: the liquid is mixed with a light red dye simulating the color of follicular fluid, so that the follicular fluid can be distinguished from the clear water filled in the pelvic cavity when the follicular fluid is sucked.

[0014] As a further solution of the utility model: the vaginal profiling model is detachably connected to the pelvic cavity model via a vaginal vault profiling model.

[0015] As a further solution of the utility model: the connection between the pelvic cavity model and the vaginal contour model is detachably provided with a curved surface structure that protrudes toward the pelvic cavity model and is conducive to fitting the transvaginal ultrasound probe.

[0016] As a further solution of the utility model: the curved surface structure is a membrane structure with a thickness of 3 mm.

[0017] As a further solution of the utility model: a metal weight base is arranged at the lower part of the lower abdomen, pelvic cavity and perineum profiling model.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] Under the effect of the concentration difference of the solution inside and outside the follicle cluster model, the follicle cluster model can naturally settle to the bottom of the pelvic cavity modeling model, and there is a certain degree of freedom between the follicle cluster models and between the follicle cluster models and the pelvic cavity modeling model, so that the follicle cluster model can automatically move in the pelvic cavity modeling model during puncture, so as to simulate the automatic movement of the ovary in the pelvic cavity in actual operation. At the same time, multiple follicle cluster models are set up for trainees to perform multiple puncture and extraction operations, avoiding repeated pauses to replace follicle consumables during use, thereby improving the degree of simulation restoration;

[0020] The curved structure can simulate the top of the vaginal vault, and the transvaginal ultrasound probe can fit tightly against the structure, which is beneficial for ultrasonic penetration, and water is not easy to seep through the structure when the puncture needle passes through the structure. The structure can be disassembled and replaced after multiple punctures, which is beneficial for maintaining the long-term use effect of the model. At the same time, at the end of the last use, the structure can be opened to facilitate the pouring of clean water in the pelvic contour model along the vaginal contour model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a three-dimensional structural diagram of an embodiment of a teaching aid for simulating egg retrieval surgery through vaginal ultrasound guidance.

[0022] Figure 2 The present invention is a front view of an embodiment of a teaching aid for simulating a surgical procedure of egg retrieval through vaginal puncture under the guidance of ultrasound.

[0023] Figure 3 The present invention is a top view of an embodiment of a teaching aid for simulating a surgical procedure of egg retrieval through vaginal ultrasound guidance.

[0024] Figure 4 The present invention is a side view of an embodiment of a teaching aid for simulating a surgical procedure of egg retrieval through vaginal puncture under the guidance of ultrasound.

[0025] Figure 5 The present invention is a cross-sectional view of an embodiment of a teaching aid for simulating a surgical procedure of egg retrieval through vaginal puncture under the guidance of ultrasound.

[0026] In the figure: 1. Lower abdominal pelvic cavity and perineum profiling model; 2. Vaginal vault profiling model; 3. Pelvic cavity profiling model; 4. Follicle cluster model; 5. Metal weighted base; 6. Vaginal profiling model; 7. Curved surface structure. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] See also Figure 1 to Figure 5In an embodiment of the utility model, a teaching aid for simulating transvaginal ultrasound-guided puncture and egg retrieval surgery includes: a lower abdominal pelvic cavity and perineum model 1 and a vaginal model 6.

[0030] The lower abdominal pelvic cavity and perineum profiling model 1 is provided with a pelvic cavity profiling model 3, in which a plurality of follicle cluster models 4 can be placed. Specifically, when in use, clean water needs to be injected into the pelvic cavity profiling model 3. Considering that clean water may attenuate ultrasonic waves, the amount of clean water injected needs to be controlled. Specifically, the clean water only needs to be able to submerge the follicle cluster models 4.

[0031] The follicle cluster model 4 is grape-shaped and includes multiple follicle-like models. 4 to 8 follicle-like models are bonded at the vertex positions of a regular tetrahedron to form the follicle cluster model 4. The surface of the follicle-like model is made of natural latex material with a wall thickness of 0.1 to 0.2 mm and is wrapped with liquid. The liquid is mixed with a light red dye that simulates the color of follicular fluid to distinguish it from the clean water injected into the pelvic cavity-like model 3. During simulation, 6 to 8 groups of follicle cluster models 4 can be placed in the pelvic cavity-like model 3, so that multiple follicle-like models can be punctured and aspirated in one simulated operation, avoiding repeated pauses for replacing consumables during use, while improving the simulation restoration degree, so that the efficiency and pertinence of training are increased.

[0032] It should be noted that the liquid in the follicle-shaped model is a high-concentration saline solution, specifically a 10% sodium chloride solution. At this time, when the follicle cluster model 4 is placed in the clean water in the pelvic cavity-shaped model 3, since the density of the liquid in the follicle cluster model 4 is greater than the density of the clean water, the follicle cluster model 4 can naturally sink to the bottom of the pelvic cavity-shaped model 3. At this time, during puncture, the follicle cluster model 4 has a certain degree of freedom in the pelvic cavity-shaped model 3, and can simulate the surgical difficulty of the ovary moving in the pelvic cavity during the formal operation.

[0033] It is worth noting that the material of the follicle cluster model 4 is relatively soft. When the sodium chloride solution is punctured and aspirated, it can be seen under ultrasound that the four walls of the follicle-shaped model naturally collapse toward the center. Since light red pigment is added to the sodium chloride solution, this is consistent with the phenomenon in actual operation, making the simulation closer to the phenomenon caused by actual operation.

[0034] Based on the above principle, under the effect of the concentration difference of the solution inside and outside the follicle cluster model 4, the follicle cluster model 4 can naturally settle to the bottom of the pelvic cavity model 3, and there is a certain degree of freedom between the follicle cluster model 4 and the follicle cluster model 4 and between the follicle cluster model 4 and the pelvic cavity model 3, so that the follicle cluster model 4 can automatically move in the pelvic cavity model 3 during puncture to simulate the situation in which the ovaries automatically move in the pelvic cavity in actual operation. At the same time, multiple follicle cluster models 4 are set up for trainees to perform multiple puncture and extraction operations, avoiding repeated pauses to replace follicle consumables during use, thereby improving the degree of simulation restoration.

[0035] To sum up, in this embodiment, the follicles are designed to be clustered, and multiple follicle cluster models 4 are stacked freely in the pelvic cavity modeling model 3. They can have a certain degree of mobility during egg retrieval, and the relative position of the follicle modeling model is constantly changing, restoring the real scene of the free movement of organs during egg retrieval. The follicle modeling model is made of natural latex material with appropriate thickness. The imaging under ultrasound is consistent with the real follicles. During suction, it naturally collapses and fits the egg retrieval needle. The simulation feels realistic, and the arrangement and stacking of the follicles are full of randomness. The size and density are different under different ultrasound sections, which fits the actual surgical process.

[0036] The lower abdomen pelvic cavity and perineum profiling model 1 is mainly used to accommodate the pelvic cavity profiling model 3 and the vaginal profiling model 6. The lower abdomen pelvic cavity and perineum profiling model 1 has a cubic structure. The upper side (ventral side) is open to facilitate the injection of clean water into the pelvic cavity profiling model 3 and the addition / removal / replacement of the follicle cluster model 4. The other three sides (bilateral side and head side) are non-functional surfaces, which are wrapped with flesh-colored rubber material.

[0037] It is worth noting that the natural ovaries are bilateral oval thin organs located at the bottom of the pelvic cavity, separated from each other. However, after IVF-ET ovulation induction, both ovaries can enlarge to about 10 cm and be adjacent to each other, close to the vaginal vault, and push away the uterus, intestines and other organs. This model was designed with this situation in mind, and the model was abstracted and simplified, and the design of other organs in the pelvic model was cancelled. On the one hand, this avoids the uterus and intestinal models from affecting the penetration or reflection of ultrasound, highlights the imaging effect of the follicles themselves under ultrasound, and ensures that beginners focus on the training of exposing the largest section of the follicles and puncture and aspiration; on the other hand, it avoids the occupation of these structural spaces, reduces the weight of the model and the production cost, as well as the cost of subsequent replacement of the module.

[0038] See also Figure 5The vaginal profiling model 6 is detachably connected to the pelvic profiling model 3. Specifically, the vaginal profiling model 6 is detachably connected to the pelvic profiling model 3 through the vaginal vault profiling model 2. The vaginal profiling model 6 is made of soft silicone and has a suitable thickness at the top, which has a good ultrasonic wave conduction effect. Since the vaginal profiling model 6 is detachably connected to the pelvic profiling model 3 through the vaginal vault profiling model 2, the difficulty of disassembling the model during replacement and cleaning is increased. At the same time, the detachable modular design reduces the manufacturing cost and the use cost, and avoids the situation where a single model is damaged and the entire model needs to be replaced.

[0039] Furthermore, the vaginal profiling model 6 simulates structures such as the labia perineum and the vaginal vestibule toward the operator, and the vaginal ultrasound probe is inserted therefrom.

[0040] The connection between the pelvic cavity profiling model 3 and the vaginal profiling model 6 is detachably provided with a curved surface structure 7 which protrudes toward the pelvic cavity profiling model 3 and is conducive to fitting the transvaginal ultrasound probe. The curved surface structure 7 is a membrane structure with a thickness of 3 mm.

[0041] The curved structure 7 is mainly used to simulate the top of the vaginal vault. The transvaginal ultrasound probe can be in close contact with the structure, which is conducive to the penetration of ultrasound waves, and the puncture needle is not easy to penetrate water when passing through the structure. After multiple punctures (50 times), the structure can be disassembled and replaced, which is conducive to maintaining the long-term use effect of the model. At the same time, at the end of the last use, the structure is opened to facilitate the clear water in the pelvic contour model 3 to be poured out along the vaginal contour model 6.

[0042] A metal weight base 5 is provided at the lower part of the lower abdominal pelvic cavity and perineum profiling model 1 to enhance the stability of the model during the puncture operation when the transvaginal ultrasound probe presses against the vaginal vault profiling model 2. Preferably, the mass of the metal weight base 5 is 1 kg.

[0043] As an embodiment of the present invention, a method for using the teaching aid is also proposed, comprising the following steps:

[0044] Step 1: Place the lower abdominal pelvic cavity and perineum model 1 as a whole on the operating table, with the perineum placed and aligned in the same position as the patient's perineum during surgery. Then, according to teaching needs, place 3 to 5 groups of follicle cluster models 4 in the pelvic cavity model 3. The follicle clusters are stacked in groups, not a pile of evenly placed follicles. Figure 5 As shown; the remaining space in the pelvic contour model 3 is filled with clean water to the scale line position;

[0045] Step 2: According to the routine surgical procedures, the vulva is disinfected with complex iodine, the vagina is flushed, a towel is laid, a transvaginal ultrasound probe of appropriate frequency (about 6.5MHz) is selected, a sterile protective cover is tied, the puncture guide frame is fixed on the probe, the egg retrieval puncture needle, the negative pressure suction device and the follicular fluid collection tube are connected, the negative pressure suction device is adjusted to a reasonable working pressure (100-120mmHg, 1mmHg=0.133KPa), and routine inspections are performed as usual.

[0046] Insert the ultrasonic probe from the vaginal opening of the vaginal profiling model 6 and press against the vaginal vault profiling model 2 to ensure that the curved surface structure 7 on the vaginal vault profiling model 2 fits well with the probe, turn on the ultrasonic device, observe the development of the follicle cluster model 4 under ultrasound, observe the adjacent relationship between the follicle profiling models, observe the distance relationship between the follicle cluster model 4 and the pelvic cavity profiling model 3, call out the ultrasonic puncture guide line, design and determine the follicle puncture path, make as many follicle sections as possible on the same puncture guide line path, and expose the largest follicle section under ultrasound as much as possible.

[0047] The puncture needle is placed in the puncture guide frame, and the puncture needle is quickly passed through the vaginal vault profiling model 2 along the guide line according to the designed puncture path, and then pierced into the follicle profiling model, and the negative pressure suction is turned on to make the needle tip located in the center of the follicle profiling model as much as possible. After the negative pressure is turned on, it can be seen that light pink liquid is sucked into the collecting tube, and the four walls of the follicle profiling model are fitted and shrunk toward the needle tip. After one follicular fluid is sucked out, the next follicle profiling model is pierced in the order from near to far, and the above suction process is repeated;

[0048] Step 3: After completing all puncture and suction procedures, remove the puncture guide frame and sterile protective cover, wipe the probe with alcohol, turn off the ultrasound, and take out all the used follicle cluster models 4 from the top opening of the pelvic cavity model 3; open the vaginal vault model 2, and the clean water in the pelvic cavity will flow out from the vaginal model 6. If the curved surface structure 7 leaks due to frequent use, it can be discarded and replaced or repaired with a waterproof sealing film to ensure the stability of the effect of the teaching aid after multiple uses. Wipe the remaining water stains on the teaching aid with a paper towel and return it to its original position for storage. In this embodiment, Figure 5 As shown, the curved surface structure 7 may be a detachable and replaceable latex film for fitting the ultrasonic probe.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A teaching aid for simulating transvaginal ultrasound-guided puncture and egg retrieval surgery, characterized in that: include: A lower abdominal pelvic cavity and perineum model (1), wherein a pelvic cavity model (3) is formed inside the lower abdominal pelvic cavity and perineum model (1), and a plurality of follicle cluster models (4) can be placed inside the pelvic cavity model (3); The vaginal profiling model (6) is detachably connected to the pelvic cavity model (3).

2. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 1, characterized in that: The follicle cluster model (4) is grape-shaped and comprises a plurality of follicle-shaped models. Four to eight follicle-shaped models are bonded together to form the follicle cluster model (4).

3. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 2, characterized in that: The surface of the follicle-shaped model is made of natural latex material, has a wall thickness of 0.1 to 0.2 mm, and is wrapped with liquid.

4. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 3, characterized in that: The liquid is mixed with a reddish dye that simulates the color of follicular fluid.

5. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 1, characterized in that: The vaginal profiling model (6) is detachably connected to the pelvic cavity model (3) via the vaginal vault profiling model (2).

6. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 1, characterized in that: The connection between the pelvic cavity model (3) and the vaginal profiling model (6) is detachably provided with a curved surface structure (7) that protrudes toward the pelvic cavity model (3) and facilitates full fit with the vaginal ultrasound probe.

7. The teaching aid for simulating transvaginal ultrasound-guided egg retrieval surgery according to claim 6, characterized in that: The curved surface structure (7) is a latex membrane structure with a thickness of 3 mm.

8. The teaching aid for simulating transvaginal ultrasound-guided puncture and egg retrieval surgery according to claim 1, characterized in that: A 1kg metal weight base (5) is arranged at the lower part of the lower abdominal pelvic cavity and perineum contour model (1).

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