Full-automatic ultrasonic imaging postpartum hemorrhage uterine cavity gauze-air bag filling hemostasis training equipment

Abstract

The invention relates to medical education equipment, in particular to full-automatic ultrasonic-guided postpartum hemorrhage uterine cavity gauze-air bag filling hemostasis training equipment which comprises a simulation postpartum puerpera model, a microcomputer controller, a full-automatic blood circulation device, a full-automatic uterine cavity balloon inflation-exhaust-pressure detection device, a manual inflation device and a uterine cavity filling balloon. Provided is a vaginal occlusion balloon. The simulated postpartum hemorrhage uterus is arranged in the abdominal skin-subcutaneous tissue and the abdominal-pelvic cavity of the simulated postpartum puerpera model, and is formed in a mold by adopting organic glue with the basically same tissue density and acoustic impedance characteristics as those of a real person, so that postpartum hemorrhage such as vaginal bleeding, bleeding of a bleeding observation tube, and the like is vividly simulated. A color Doppler dynamic blood flow image can be displayed on a display screen by scanning a uterus area through a color ultrasonic diagnostic apparatus probe. The device can be used for carrying out uterine cavity balloon-gauze inflation filling rapid hemostasis, is suitable for carrying out postpartum hemorrhage uterine cavity gauze-balloon filling hemostasis training and examination in the obstetrical department, and remarkably improves the training effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical education equipment, and more specifically, to a fully automatic ultrasonic imaging training device for uterine gauze-balloon packing for postpartum hemorrhage. Background Art

[0002] For more than 60 years, the world medical community has been applying balloon compression hemostasis in clinical work for first aid measures for internal medical upper gastrointestinal hemorrhage, epistaxis, etc., and the curative effect is affirmed. For parturients with postpartum uterine hemorrhage, the traditional and simple hemostasis method is to use intrauterine gauze packing. In recent years, obstetrics has also started to use balloon compression to stop postpartum hemorrhage. The method is to place a balloon connected to a catheter into the uterine cavity, and then inject air or normal saline into the balloon through the catheter. The balloon pressure increases, and the inner wall blood vessels of the uterus are mechanically compressed by the balloon, so as to reduce uterine bleeding and then stop bleeding. In recent years, many hospitals have compared the curative effects of intrauterine balloon packing and intrauterine gauze packing for parturients with postpartum hemorrhage. The results are as follows: in the group using intrauterine balloon packing for compression hemostasis, the time of vaginal delivery and cesarean section, the intraoperative blood loss, the blood loss within 24 hours after surgery, and the blood transfusion volume are all better than those of intrauterine gauze packing; the removal time of the packing material and the hospital stay are significantly shortened, and the total incidence of adverse events is also significantly reduced, and the total success rate of hemostasis is significantly increased. Using intrauterine balloon packing to treat postpartum hemorrhage is faster, safer and more effective than gauze packing. Postpartum hemorrhage is fierce and endangers the life of the parturient, and hemostasis must be carried out without delay. However, when rescuing parturients with postpartum uterine hemorrhage, the technology must be proficient, and a little carelessness will lead to the failure of the rescue. Therefore, it is necessary to train the obstetric technical personnel. However, with the enhancement of people's legal awareness and self-protection awareness, parturients and their families often refuse to be operated on by inexperienced medical staff and medical students. Trainees rarely have the opportunity to operate by themselves. In the world medical education equipment, the training and assessment equipment for ultrasonic-guided intrauterine gauze-balloon packing is blank, which seriously affects the cultivation and improvement of obstetric technical talents. Therefore, it is very necessary to develop a training device for ultrasonic imaging uterine gauze-balloon packing hemostasis for postpartum hemorrhage. Summary of the Invention

[0003] The object of the present invention is to provide a fully automatic ultrasonic imaging training device for uterine gauze-balloon packing hemostasis for postpartum hemorrhage. By using a simulated parturient model with postpartum hemorrhage, trainees use the probe of a real color ultrasonic diagnostic instrument to perform skills training and assessment of uterine gauze-balloon packing hemostasis for postpartum hemorrhage under ultrasonic imaging, which significantly improves the training effect.

[0004] The present invention solves the problem of the lack of training and assessment equipment for the gauze-balloon tamponade hemostasis technique of ultrasonic imaging in postpartum hemorrhage for obstetric professionals, filling the gap in this medical education equipment and being the world's first training and assessment equipment for gauze-balloon tamponade hemostasis in postpartum hemorrhage under automatic ultrasonic guidance. The automatic blood circulation device has a blood storage bottle (20) in the microcomputer chassis (13). The bottle is provided with a blood bottle simulated blood injection tube (21), which is connected to a one-way check valve or a water stop clamp (22), and also has a blood bottle overflow tube (23). The blood storage bottle (20) is communicated with the liquid level gauge (16). The input tube (24) of the microcirculation pump (23) is connected to the blood storage bottle (20). The output tube (27) of the pump passes through the chassis (13) via the connector fitting (12-3) and is connected to the connector fitting (12-1) of the simulated blood input tube (8) on the uterine wall of the simulated postpartum parturient model (1). It is divided into two paths through a catheter connected to the first three-way joint (27-1). The first path is connected to the simulated blood input tube (8) of the simulated postpartum hemorrhagic uterus (3) via the connector fitting (12-1). The second path is connected to the flow regulating valve (28). The valve is connected to the second three-way joint (27-2) via a catheter and is divided into two parts. The first path is connected to the vaginal blood drainage tube (30) via the first solenoid valve (29-1), passes through the vagina (6) and exits the vaginal orifice (7), and is inserted into the simulated blood collection container (31). The other end of the three-way joint (27-2) passes through the second solenoid valve (29-2) and enters the blood flow observation tube (32) of the simulated postpartum parturient model (1). The lower end of the tube is connected to a catheter, passes through the one-way check valve (33), and is connected to the simulated blood return tube (12-2) through the third three-way joint (27-3). The end of the tube passes through the connector fitting (12-4) of the chassis (13) and is connected to the blood storage bottle (20) through the blood storage bottle simulated blood return tube (12-2). The probe (TT) of the color ultrasonic diagnostic instrument (CSY) scans the uterine area of multiple uterine wall blood vessels 10, and the color Doppler dynamic blood flow image (TX) can be presented on the display screen (XSP). The intrauterine balloon inflation-pressure detection-automatic control device has a micro air pump (34) arranged in the microcomputer controller chassis. The output tube (35) of the air pump is divided into two parts through the fourth three-way joint (27-4). The first path is connected to the intrauterine balloon inflation tube (19). The second path is connected to the fifth three-way joint (27-5). One end of the three-way joint is connected to the pressure detection tube (19') and is connected to a pressure gauge (36) of 0-300 mmHg. A wire (37-1) is fixed on the metal case screw and is insulated from the case of the dial (36'). A metal contact (38) is set at 130 mmHg of the dial (36'). The contact is connected to a wire (37-2). The two wires are led out of the case and connected to the microcomputer programming control module (15). The module is connected to the microcirculation pump (23) through the first signal line (XH-1) via the first relay (JD-1). The module is connected to the micro air pump (34) through the second signal line (XH-2) via the second relay (JD-2). The other end of the fifth three-way joint (27-5) is connected to the exhaust solenoid valve (39).A fully automatic ultrasonic imaging postpartum hemorrhage intrauterine gauze-balloon packing hemostasis training device according to claim 1, characterized in that: the manual air injection device uses a 100-200 ml syringe or a syringe-type enema (41). A sixth three-way joint (27-6) is connected to the nipple of the syringe or enema. A one-way valve A (42) with a valve opening towards the balloon is connected to the front end of the three-way joint. A one-way valve B (43) with a valve opening towards the three-way joint is connected to the side end of the three-way joint as an air inlet valve. It can also be inflated using a rubber ball (44) with a valve for inflating a sphygmomanometer. A fully automatic ultrasonic imaging postpartum hemorrhage intrauterine gauze-balloon packing hemostasis training device according to claim 1, characterized in that: the intrauterine packing balloon is a spherical or inverted pear-shaped intrauterine packing balloon (45) made of plastic or latex. The neck of the balloon is hermetically connected to the intrauterine balloon connecting tube (46), and the lower part is connected to a seventh three-way tube (27-7). One end of the three-way joint is connected to the intrauterine balloon inflation tube (19), and the other end is connected to the pressure detection tube (19'). One or two layers of hemostatic gauze / medical gauze (47) are arranged on the outer wall of the intrauterine packing balloon (45). A fully automatic ultrasonic imaging postpartum hemorrhage intrauterine gauze-balloon packing hemostasis training device according to claim 1, characterized in that: the vaginal balloon (48) is a small balloon with a neck connected to a joint pipe fitting (49), and is connected to a rubber inflation ball (44') with a valve for a sphygmomanometer through an inflation catheter (50). BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 Schematic diagram of the overall structure of the present invention Figure 2 Schematic diagram of the simulated postpartum parturient model of the present invention Figure 3 Schematic diagram of the uterine blood circulation and simulated postpartum hemorrhage device of the present invention Figure 4 Schematic diagram of the automatic control device for inflating, exhausting and pressure detecting of the intrauterine balloon of the present invention Figure 5 Schematic diagram of the structure of the intrauterine balloon of the present invention Figure 6 Schematic diagram of the structure of the vaginal balloon of the present invention Figure 7 Schematic diagram of the structure of the manual inflation device of the present invention Figure 8 Front view schematic diagram of the external part of the chassis of the present invention Figure 9 Rear view schematic diagram of the external part of the chassis of the present invention Figure 10 Schematic diagram of the control circuit principle of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0006] The advantages and beneficial effects of the present invention are that a probe of a real - color ultrasonic diagnostic instrument can be used to scan the simulated maternal uterine area, dynamic color blood flow can be seen on the ultrasonic display screen, bleeding can be seen in the vagina and the bleeding observation tube, vividly simulating postpartum hemorrhage. By using the present invention for the skill training and assessment of the gauze - balloon packing hemostasis technique for postpartum hemorrhage, the simulated postpartum hemorrhage can be quickly stopped, significantly improving the training effect.

[0007] The present invention will be further described below in conjunction with the accompanying drawings: The abdominal skin - subcutaneous tissue 2, simulated postpartum hemorrhage uterus 3, cervix 5, and vagina 6 of the maternal model 1 for simulating postpartum hemorrhage of the present invention are formed by using a liquid silicone rubber mold with basically the same tissue density and ultrasonic acoustic impedance characteristics as real human tissues. The inner lining skeleton of the model is formed by hard PVC injection molding. The simulated blood input tube 8, uterine wall simulated blood vessels 10, simulated blood return tube 11, and various catheters are made of silicone rubber tubes, and other components are available in the market. The micro - circulation pump 23 uses 12 / 24V 5W 5 - 10 L / min; the micro - air pump 34 uses 12 / 24V 5W; the pressure gauge 36 has a pressure of 0 - 300 mmHg. The chip of the micro - computer programming control module (15) uses a 51 single - chip microcomputer. The balloon 45 for postpartum hemorrhage tamponade hemostasis is made of a reinforced natural latex balloon. The simulated blood is made by stirring 0.5g of animal blood powder and 0.5g of red pigment into 1000 ml of pure water. Prepare various components and install them according to the instructions with reference to the attached drawings of the instructions. Adjust the simulated blood input tube 8 connected through the second - way flow regulating valve 28 to several dozen drops per minute, and it can be used after debugging. First step, make preparations: When in use, place the color ultrasonic diagnostic instrument, the simulated postpartum maternal model 1, the micro - computer controller chassis 13 - 1, the balloon 45 for postpartum hemorrhage tamponade hemostasis and the manual air injection device, simulated disinfected items, etc. on the experimental table, and insert the AC 220V power plug of the chassis 13 into the power socket. Second step, make good the pipeline connection and inject simulated blood into the blood storage bottle 20. When conducting the skill training / assessment of the postpartum hemorrhage balloon tamponade hemostasis technique, seal the balloon neck of the uterine cavity tamponade balloon 45 for postpartum hemorrhage with the uterine cavity balloon connection tube 46, and connect the lower part to the seventh three - way joint 27 - 7. One end of this three - way joint is connected to the uterine cavity balloon inflation tube 19, and the other end is connected to the pressure detection tube 19'. Use a large syringe to draw simulated blood and inject it into the blood storage bottle 20 through the blood bottle simulated blood injection tube 21 until the simulated blood drips out from the blood bottle overflow tube 23, indicating that it is full. Since there is a one - way check valve / or a water stop clip 22 on the blood bottle simulated blood injection tube 21, the injected simulated blood will not flow out. Third step, simulate postpartum hemorrhage by ultrasonic imaging. Press the power switch K, the indicator light L lights up. Press the blood circulation key K1, the indicator light L1 lights up, and the micro - circulation pump 25 operates. The blood pump input tube 24 draws simulated blood from the blood storage bottle 20, connects to the uterine wall simulated blood input tube 8 of the simulated postpartum maternal model 1 through the joint fitting 11 - 1, enters multiple uterine wall simulated blood vessels 10 through the multi - way tube 9 - 1, converges and then flows into the simulated blood return tube 11 through the multi - way tube 9 - 2 on the opposite side, and returns to the blood storage bottle 20 in the chassis 13 through the end connection of this tube and the joint fitting 11 - 2. This process is repeated cyclically to form the blood circulation of the uterine wall. Due to the simulated postpartum maternal model 1 of the present invention, the abdominal skin - subcutaneous tissue 2 and the simulated postpartum hemorrhage uterus 4 both have basically the same tissue density and ultrasonic acoustic impedance characteristics as real human tissues, and the relative movement between the probe and the simulated blood in the uterine wall blood vessels produces the Doppler effect.Therefore, according to the routine of ultrasonic diagnosis operation, using the CSY ultrasonic probe TT of the color ultrasonic diagnostic instrument to scan the abdominal uterine area of the simulated postpartum parturient model 1, a dynamic color Doppler blood flow image TX can be displayed on the ultrasonic display screen, indicating postpartum uterine bleeding. Fourth step, simulate visible postpartum bleeding; press the vaginal bleeding key K2, and the indicator light L2 lights up. The first electromagnetic valve 29-1 is energized and opened. The blood in the simulated blood input tube 8 passes through the flow regulating valve 28 connected to the second path, and then through the second three-way joint 27-2. It is simulated that the blood passes through the first path, that is, the electromagnetic valve 20-1, the vaginal blood vessel 30, and flows out of the vaginal orifice 7 through the vagina 6, and the simulated blood flowing into the simulated blood collection container 31 can be seen with the naked eye, vividly simulating the scenario of postpartum vaginal bleeding. The simulated blood collected in the simulated blood collection container 31 can be drawn with a syringe and injected into the blood storage bottle 20 through the simulated blood injection tube 21; press the bleeding observation key K3, and the indicator light L3 lights up. The second electromagnetic valve 29-2 is energized and opened. The simulated blood flows into the bleeding observation tube 32 of the simulated postpartum parturient model 1 through the third three-way joint 27-3, and the dripping speed of several dozen drops / min can be observed with the naked eye. The simulated blood passes through the catheter connected to the lower end of this tube, passes through the one-way check valve 33, passes through the simulated blood return tube 12-2, passes through the joint fitting 12-4 of the chassis 13, and is connected to the blood storage bottle through the simulated blood return tube (12-2) of the blood storage bottle (20); Fifth step, training and assessment of intrauterine gauze-balloon packing hemostasis technique 1. Arrange 1-2 layers of medical gauze or hemostatic gauze 47 on the outer wall of the intrauterine balloon 45. Clamp the intrauterine balloon 45 with a surgical ovum forceps and place it into the uterine cavity. Then clamp the vaginal balloon 48 with the ovum forceps and place it in the vagina. Manually squeeze the air injection rubber ball (44’) connected to the balloon and inject air into the vaginal balloon 46 8-10 times to make the balloon expand and block the vagina 6 to prevent the intrauterine balloon 45 from slipping out after inflation and pressurization.2. Skills training for hysteroscopic balloon tamponade hemostasis with fully automatic balloon inflation; press the balloon inflation key K4, and the indicator light L4 lights up. The micro air pump 34 set inside the microcomputer controller chassis 13 is powered on and operates. The air is divided into two parts through the output pipe 34' of the air pump via the fourth three-way joint 27-4. The compressed air from the micro air pump 34 in the first path continuously enters the intrauterine balloon 45 through the connected intrauterine balloon inflation tube 19, causing the air pressure inside the balloon to rise. The compressed air in the other path enters the pressure gauge 36 connected to 0-300 mmHg through the pressure detection tube 19'. Since a wire 37-1 is fixed on the metal case screw of the pressure gauge and a metal contact 38 is set at the 130 mmHg position of the dial 35' with insulation treatment for the case, and this contact is connected to the wire 37-2. When the air pressure rises to 130 mmHg, the tail of the pointer of the pressure gauge 36 touches the metal contact 38 at this place, and the two wires are short-circuited. The signal is transmitted to the connected microcomputer programming control module 15, and this module issues an instruction through the first signal line XH-1 to cut off the power supply of the connected microcirculation pump 23 through the first relay JD-1 and stop its operation. At the same time, this module issues an instruction through the second signal line XH-2 to cut off the power supply of the connected micro air pump 34 through the second relay JD-2 and stop its operation. At this time, the color Doppler dynamic blood flow image TX on the display screen XSP scanned by the ultrasonic probe TT disappears, indicating that postpartum hemorrhage has stopped. At the same time, the bleeding in the vaginal drainage tube 30 and the bleeding observation tube 32 also stops, marking that the operator has successfully stopped postpartum hemorrhage by intrauterine gauze-balloon tamponade, and the assessment result is determined to be qualified. 3. Skills training for hysteroscopic balloon tamponade hemostasis with manual balloon inflation; for the "actual combat" training of obstetric clinical rescue for postpartum hemorrhage, skills training for hysteroscopic balloon tamponade hemostasis with manual balloon inflation can be adopted. A 100-200 ml syringe or injection enema 41 can be used, and its nipple is connected to the intrauterine balloon inflation tube 40. Pull the piston core of the syringe or enema, and the one-way valve A42 generates negative pressure to draw air from the side end of the three-way joint 27-6 connected to the intake one-way valve A42 into the barrel of the device. Then push the piston core to generate high-pressure air. The one-way valve A42 closes under the action of the high-pressure air, and the high-pressure air is filled into the intrauterine balloon 45 through the exhaust valve one-way valve B43. Repeatedly pull and push the piston core of the syringe or enema to become a "manual air pump" to continuously fill the intrauterine balloon 45 with high-pressure air. A rubber ball (44) with a valve for inflating a sphygmomanometer can also be used as a manual air pump to inflate the intrauterine balloon 45.Compressed air enters the connected pressure gauge 36 with a range of 0 - 300 mmHg through the pressure detection tube 35... When the air pressure rises to 130 mmHg, the microcomputer programming control module 15 issues an instruction. Through the first signal line XH-1 and the first relay JD-1, the connected microcirculation pump 23 is powered off and stops operating. At the same time, the module issues an instruction through the second signal line XH-2 and the second relay JD-2 to power off and stop the operation of the connected micro air pump 34. At this time, the color Doppler dynamic blood flow image TX on the display screen XSP scanned by the ultrasonic probe TT disappears, indicating that postpartum hemorrhage has stopped. At the same time, the bleeding in the vaginal blood vessel 30 and the bleeding observation tube 32 also stops, indicating that the operator's manual inflation device for postpartum hemorrhage uterine cavity gauze-balloon packing hemostasis is successful, and the assessment result is determined to be qualified. For many years, the traditional method for rescuing postpartum hemorrhage in obstetric clinics has been uterine cavity gauze-balloon packing. The principle of hemostasis is as follows: By packing the uterine cavity, it compresses the capillary vessels in the uterine wall to reduce bleeding; the rough surface provided by the packed gauze can activate coagulation factors and adsorb platelets to promote blood coagulation. In this project, a balloon with 1 - 2 layers of medical gauze / hemostatic gauze is arranged on the outer wall of the uterine cavity packing balloon 45. Inflating the balloon to an average pressure of 130 mmHg, which is the normal delivery uterine pressure (pressure range: 100 - 150 mmHg), can achieve the purpose of compressing capillary vessels to reduce bleeding and hemostasis. Moreover, the 1 - 2 layers of gauze on the outer wall of the balloon can activate coagulation factors and adsorb platelets to promote blood coagulation. It is faster and more reliable than simple uterine cavity gauze packing hemostasis. After the skill training or assessment is completed, press the balloon exhaust key K5. The exhaust solenoid valve 39 connected to the balloon inflation tube 40 is energized and opened. The high-pressure air in the uterine cavity packing balloon 45 is discharged through this exhaust solenoid valve. Then, press the reset key K6 to reset the control system, and a new training or assessment can be carried out.

Claims

1. A fully automatic training device for gauze-balloon packing hemostasis in the uterine cavity during childbirth under ultrasonic guidance, comprising: Simulation postnatal maternal model, microcomputer controller, fully automatic blood circulation device, fully automatic intrauterine balloon inflation - deflation - pressure detection device, manual inflation device, intrauterine packing balloon, vaginal balloon, characterized in that: the simulation postnatal maternal model (1), soft and elastic abdominal skin - subcutaneous tissue (2), and a simulated postnatal bleeding uterus (4) is arranged in the abdominal - pelvic cavity (3), all of which are formed in a mold using an organic glue with basically the same tissue density and acoustic impedance characteristics as real human tissues. A simulated postnatal bleeding uterus (3) is arranged in the abdominal - pelvic cavity, the lower part of the uterine body is the cervix (5), which is connected to the vagina (6) and the vaginal orifice of the vulva (7) below; one side of the postnatal bleeding uterus (3) is connected to a simulated blood input tube (8), which is connected to multiple simulated uterine wall blood vessels (10) through a multi - way tube (9 - 1), and is connected to a simulated blood return tube (11) through another multi - way tube (9 - 2). The simulated blood input tube (8) and the simulated blood return tube (11) are both connected to the microcomputer controller through the connector fittings (12 - 1, 12 - 2) of the simulated maternal model (1); for the microcomputer controller, a DC power supply (14), a microcomputer programming control module (15 - 1), an intelligent non - specific voice control module (15 - 2), and a training audio - visual guidance module (15 - 3) are arranged in the chassis (13); on the chassis panel (13 - 1) of the microcomputer controller, there are a power switch (K), a blood circulation key (K1), a vaginal bleeding key (K2), a bleeding observation key (K3), a balloon inflation key (K4), a balloon deflation key (K5), a reset key (K6), a liquid level gauge (16), and a pressure gauge (YL). On the rear panel (13 - 2) of the chassis, there are a power cord and its plug (AC220V), connector fittings (12 - 3), (12 - 4), a simulated blood input tube (8), a simulated blood return tube (11), a blood bottle simulated blood injection tube (17), a blood bottle overflow tube (18), an intrauterine balloon inflation tube (19), and a balloon pressure detection tube (19').

2. A training device for the hemostasis technique of packing the uterine cavity with gauze and balloon under full-automatic ultrasound guidance, comprising: Simulated postnatal maternal model, microcomputer controller, fully automatic blood circulation device, fully automatic intrauterine balloon inflation-exhaustion-pressure detection device, manual inflation device, intrauterine packing balloon, vaginal balloon, characterized in that: the simulated postnatal maternal model (1), soft and elastic abdominal skin-subcutaneous tissue (2), a simulated postnatal bleeding uterus (4) is arranged in the abdominal-pelvic cavity (3), all are formed in a mold with an organic glue similar to the tissue density and acoustic impedance characteristics of real human tissues, a simulated postnatal bleeding uterus (3) is arranged in the abdominal-pelvic cavity, the lower part of the uterine body is the cervix (5), which is connected to the vagina (6) and the vaginal orifice (7) of the vulva; one side of the postnatal bleeding uterus (3) is connected to a simulated blood input tube (8), which is connected to a plurality of uterine wall simulated blood vessels (10) through a multi-way tube (9-1), and is connected to a simulated blood return tube (11) through the other multi-way tube (9-2), and both the simulated blood input tube (8) and the simulated blood return tube (11) are connected to the microcomputer controller through the joint pipe fittings (12-1, 12-2) of the simulated maternal model (1); for the microcomputer controller, a DC power supply (14), a microcomputer programming control module (15-1), an intelligent non-specific voice control module (15-2), and a training audio-visual guidance module (15-3) are arranged in the chassis (13); on the chassis panel (13-1) of the microcomputer controller, there are a power switch (K), a blood circulation key (K1), a vaginal bleeding key (K2), a bleeding observation key (K3), a balloon inflation key (K4), a balloon exhaust key (K5), a reset key (K6), a liquid level gauge (16), and a pressure gauge (YL), and on the rear panel (13-2) of the chassis, there are a power cord and its plug (AC220V), joint pipe fittings (12-3), (12-4), a simulated blood input tube (8), a simulated blood return tube (11), a blood bottle simulated blood injection tube (17), a blood bottle overflow tube (18), an intrauterine balloon injection tube (19), and a balloon pressure detection tube (19').

3. A fully automatic training device for gauze-balloon packing hemostasis in the uterine cavity during postpartum hemorrhage under ultrasonic guidance, comprising: Simulation postnatal maternal model, microcomputer controller, fully automatic blood circulation device, fully automatic intrauterine balloon inflation-exhaustion-pressure detection device, manual inflation device, intrauterine packing balloon, vaginal balloon, characterized in that: the simulation postnatal maternal model (1), soft and elastic abdominal skin-subcutaneous tissue (2), and a simulated postnatal bleeding uterus (4) is arranged in the abdominal-pelvic cavity (3), all of which are formed in a mold using an organic glue with basically the same tissue density and acoustic impedance characteristics as real human tissues. A simulated postnatal bleeding uterus (3) is arranged in the abdominal-pelvic cavity. The lower part of the uterine body is the cervix (5), which is connected to the vagina (6) and the vaginal orifice of the vulva (7) below; one side of the postnatal bleeding uterus (3) is connected to a simulated blood input tube (8), which is connected to multiple uterine wall simulated blood vessels (10) through a multi-way tube (9-1), and is connected to a simulated blood return tube (11) through another multi-way tube (9-2). The simulated blood input tube (8) and the simulated blood return tube (11) are both connected to the microcomputer controller through the joint pipe fittings (12-1, 12-2) of the simulated maternal model (1); for the microcomputer controller, a DC power supply (14), a microcomputer programming control module (15-1), an intelligent non-specific voice control module (15-2), and a training audio-visual guidance module (15-3) are arranged in the chassis (13); on the chassis panel (13-1) of the microcomputer controller, there are a power switch (K), a blood circulation key (K1), a vaginal bleeding key (K2), a bleeding observation key (K3), a balloon inflation key (K4), a balloon exhaust key (K5), a reset key (K6), a liquid level gauge (16), and a pressure gauge (YL). On the rear panel (13-2) of the chassis, there are a power cord and its plug (AC220V), joint pipe fittings (12-3), (12-4), a simulated blood input tube (8), a simulated blood return tube (11), a blood bottle simulated blood injection tube (17), a blood bottle overflow tube (18), an intrauterine balloon inflation tube (19), and a balloon pressure detection tube (19’).

4. A fully automatic training device for uterine cavity gauze-balloon tamponade hemostasis under ultrasonic guidance according to claim 1, characterized in that: The manual inflation device uses a 100-200 ml syringe or a syringe-type enema (41). The nipple of the syringe or enema is connected to a sixth three-way (27-6). The front end of the three-way is connected to a one-way valve A (42) with a valve opening towards the balloon. The side end of the three-way is connected to a one-way valve B (43) with a valve opening towards the three-way as an intake valve. It can also be inflated using a rubber ball (44) with a valve for inflating a sphygmomanometer.

5. The training device for the hemostasis technique of filling the uterine cavity with gauze-airbag under full-automatic ultrasonic guidance according to claim 1, characterized in that: The intrauterine packing balloon is a spherical or inverted pear-shaped intrauterine packing balloon (45) made of plastic or latex. The neck of the balloon is hermetically connected to an intrauterine balloon connecting tube (46), which is connected to a seventh three-way tube (27-7) below. One end of the three-way is connected to an intrauterine balloon inflation tube (19), and the other end is connected to a pressure detection tube (19’); 1-2 layers of hemostatic gauze / medical gauze (47) are arranged on the outer wall of the intrauterine packing balloon (45).

6. A training method for the hemostasis of uterine cavity gauze-airbag packing under full-automatic ultrasound guidance according to claim 1, characterized in that: The vaginal balloon (48) is a small balloon with its neck connected to a joint pipe fitting (49), and then connected to a rubber inflation ball (44’) with a valve through an inflation catheter (50).

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