Water bag type cervical dilator

Abstract

The invention provides a water bag type cervical dilator which comprises a tube core and a water bag tightly attached to the outer surface wall of the tube core, and the tube core and the water bag are connected in an inserted mode. Wherein one side of the water bag is connected with a water injection pipe, the tube core is inserted into the cervix uteri, then the tube core is taken out, and water is injected into the water bag through the water injection pipe so as to achieve cervical dilatation, and the cervical dilatation device comprises the tube core and the water bag arranged on the outer surface wall of the tube core, and the water injection pipe is further arranged on one side of the water bag and inserted into the cervix uteri through the tube core. The cervix uteri is expanded in the mode that water is injected into the water bag through the water injection pipe, the expansion size of the cervix uteri is controllable, the speed is high, the cervix uteri can be used after anesthesia, the pain of a patient is small, the outer surface wall of the water bag is provided with the elastic protection layer, and the service life of the water bag is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a water-bag type cervical dilator. Background Art

[0002] In the field of obstetrics and gynecology, cervical dilation is one of the common medical operations. However, traditional cervical dilators have many obvious defects.

[0003] Seaweed dilators are prone to breakage during use, which may not only cause interruptions in the operation, but may also cause accidental damage to the patient's cervix. In addition, the material properties of seaweed dilators make them less stable and reliable in the body.

[0004] Although the sponge expander is relatively soft, its expansion capacity is limited. Due to its own physical properties, its expansion speed is slow, and it often takes a long time to achieve the desired expansion effect. This not only increases the patient's time on the operating table, but also brings more pain and discomfort to the patient.

[0005] In addition, traditional expanders are not precise enough in controlling the degree of expansion, and are difficult to flexibly adjust according to the patient's specific conditions and surgical needs, which may lead to insufficient or excessive expansion. Summary of the invention

[0006] In order to overcome the existing problems, an embodiment of the present application provides a water bag type cervical dilator, including a tube core and a water bag arranged on the outer wall of the tube core. A water injection tube is also provided on one side of the water bag, which is inserted into the cervix through the tube core. After that, the tube core inside is taken out, and the cervix is ​​expanded by injecting water into the water bag through the water injection tube. The size of the cervical expansion is controllable and the speed is fast. It can be used after anesthesia, with less pain for the patient. In addition, the outer wall of the water bag is provided with an elastic protective layer, which improves the service life of the water bag.

[0007] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0008] The water-bag cervical dilator comprises a tube core and a water bag tightly attached to the outer wall of the tube core, the thickness of the water bag when not filled with water is between 0.5-1 mm, and the maximum diameter after being filled with water and expanded can reach centimeters, and the tube core and the water bag are plug-connected;

[0009] Among them, one side of the water bag is connected to a water injection tube. The tube core is inserted into the cervix and then taken out. The tube core is made of medical-grade stainless steel material with good rigidity and smoothness to ensure smooth insertion into the cervix without scratching the tissue. The shape and size of the tube core are carefully designed to adapt to the cervical anatomical structure of different patients, and are sterilized at high temperature and high pressure. Water is injected into the water bag with the help of the water injection tube to achieve cervical dilation.

[0010] Preferably, a protective layer is provided on the outer surface of the water bag, and the protective layer is made of a polyurethane or silicone rubber material with high elasticity and wear resistance, and has good wear resistance and tensile resistance. The protective layer fits tightly to the outer wall of the water bag and is fixed by a special bonding process to ensure that it will not fall off during use. The surface of the protective layer is provided with an anti-slip texture.

[0011] Preferably, the water bag is made of medical-grade thermoplastic elastomer or natural rubber material with good flexibility and biocompatibility, and its shape and size are designed according to common cervical sizes. The water bag fits tightly with the tube core to ensure that it maintains a stable shape during insertion.

[0012] Preferably, the connection between the water injection pipe and the water bag is seamlessly welded or sealed with sealant to ensure that there is no leakage at the connection. A sealing cap is provided at the end of the water injection pipe. The water injection pipe is connected to one side of the water bag. The water injection pipe is made of durable medical plastic material with a moderate diameter, which is convenient for connecting to a syringe for water injection. A one-way valve is also provided on the water injection pipe to prevent water from flowing back into the water bag after injection. A flow control valve is provided at one end of the water injection pipe to accurately control the injection speed and amount. The flow control valve is manually adjustable or electronically controlled, and its control accuracy can reach 0.1 ml / s.

[0013] Preferably, an inner plate is provided at the contact point between the water bag and the tube core, a through-head is provided at the top end of the tube core, the through-head is located directly above the water bag, a limiting ring is provided inside the inner plate, and a push plate is provided on the outer wall of the tube core. After the tube core is connected to the water bag, the push plate is located on the lower surface of the limiting ring.

[0014] Preferably, a pressure sensor is provided inside the water bag, the measurement accuracy of the pressure sensor is within ±0.1 kPa, and the pressure sensor has waterproof and corrosion-resistant properties. The pressure sensor is communicatively connected to an external display device to display the pressure value inside the water bag in real time.

[0015] The advantages of the embodiments of the present application are:

[0016] 1. It includes a tube core and a water bag arranged on the outer wall of the tube core. A water injection tube is also arranged on one side of the water bag. The tube core is inserted into the cervix, and then the tube core is taken out. The cervix is ​​expanded by injecting water into the water bag through the water injection tube. The size of the cervical expansion is controllable and the speed is fast. It can be used after anesthesia, with little pain for the patient. In addition, the outer wall of the water bag is provided with an elastic protective layer, which increases the service life of the water bag.

[0017] 2. The uniform expansion force of the water bag structure avoids local damage, improves the safety of expansion, and reduces the risk of complications. The precisely controllable expansion size can meet the needs of different surgeries and provide more precise conditions for medical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the water bag type cervical dilator of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the water bag in the water bag type cervical dilator of the present invention;

[0021] Figure 3 It is a schematic diagram of the half-cut overall structure of the water bag in the water bag type cervical dilator of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall structure of the tube core in the water bag type cervical dilator of the present invention.

[0023] Description of main reference numerals:

[0024] 1. Tube core; 2. Water bag; 3. Water injection pipe; 4. Protective layer; 5. Inner plate; 6. Limiting ring; 7. Pressure sensor; 8. Push plate; 9. Penetration head. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, for the convenience of description below, the referenced "up", "down", "left" and "right" are equal to the up, down, left and right directions of the drawings themselves. The "first", "second" and so on in the following text are distinguished for the description and have no other special meanings.

[0026] The embodiment of the present application solves the problems in the prior art by providing a water bag type cervical dilator, which includes a tube core and a water bag arranged on the outer wall of the tube core. A water injection tube is also provided on one side of the water bag, which is inserted into the cervix through the tube core, and then the inner tube core is taken out, and the cervix is ​​expanded by injecting water into the water bag through the water injection tube. The size of the cervical expansion is controllable and the speed is fast. It can be used after anesthesia with little pain for the patient. In addition, the outer wall of the water bag is provided with an elastic protective layer, which improves the service life of the water bag. The uniform expansion force of the water bag structure avoids local damage, improves the safety of expansion, and reduces the risk of complications. The precisely controllable expansion size can meet the needs of different surgeries and provides more accurate conditions for medical operations.

[0027] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0028] Example 1

[0029] This embodiment provides a specific structure of a water bag type cervical dilator, such as Figure 1-4 As shown, it includes a tube core 1 and a water bag 2 that is tightly attached to the outer wall of the tube core 1. The thickness of the water bag 2 when not filled with water is between 0.5-1 mm, and the maximum diameter after being filled with water and expanded can reach 10 cm. The tube core 1 and the water bag 2 are plug-in connected;

[0030] Among them, one side of the water bag 2 is connected to a water injection tube 3. The tube core 1 is inserted into the cervix and then taken out. The tube core 1 is made of medical-grade stainless steel material with good rigidity and smoothness to ensure smooth insertion into the cervix without scratching the tissue. The shape and size of the tube core 1 are carefully designed to adapt to the cervical anatomical structure of different patients, and are sterilized at high temperature and high pressure. Water is injected into the water bag 2 with the help of the water injection tube 3 to achieve cervical dilation.

[0031] A protective layer 4 is provided on the outer surface of the water bag 2. The protective layer 4 is made of polyurethane or silicone rubber material with high elasticity and wear resistance, and has good wear resistance and tensile resistance. The protective layer 4 fits tightly to the outer wall of the water bag 2 and is fixed by a special bonding process to ensure that it will not fall off during use. The surface of the protective layer 4 is provided with an anti-slip texture.

[0032] The water bladder 2 is made of medical-grade thermoplastic elastomer or natural rubber material with good flexibility and biocompatibility. Its shape and size are designed according to common cervical sizes. The water bladder 2 fits tightly with the tube core 1 to ensure a stable shape during insertion.

[0033] The connection between the water injection pipe 3 and the water bag 2 is seamlessly welded or sealed with a sealant to ensure that there is no leakage at the connection. A sealing cap is provided at the end of the water injection pipe 3. The water injection pipe 3 is connected to one side of the water bag 2. The water injection pipe 3 is made of durable medical plastic material with a moderate diameter, which is convenient for connecting a syringe for water injection. A one-way valve is also provided on the water injection pipe 3 to prevent the water in the water bag 2 from flowing back after water injection. A flow control valve is provided at one end of the water injection pipe 3 to accurately control the water injection speed and amount. The flow control valve is manually adjustable or electronically controlled, and its control accuracy can reach 0.1 ml / s.

[0034] An inner plate 5 is provided at the contact point between the water bag 2 and the tube core 1, a penetration head 9 is provided at the top of the tube core 1, and the penetration head 9 is located directly above the water bag 2. A limiting ring 6 is provided inside the inner plate 5, and a push plate 8 is provided on the outer wall of the tube core 1. After the tube core 1 is connected to the water bag 2, the push plate 8 is located on the lower surface of the limiting ring 6.

[0035] A pressure sensor 7 is provided inside the water bag 2. The measurement accuracy of the pressure sensor 7 is within ±0.1 kPa, and the pressure sensor 7 has waterproof and corrosion-resistant properties. The pressure sensor 7 is connected to an external display device for communication and displays the pressure value inside the water bag 2 in real time.

[0036] By adopting the above technical solution:

[0037] A cervical dilation operation was performed on a primipara. A tube core 1 with a length of 12 cm was selected, which was made of medical grade polypropylene. A water bag 2 was made of medical grade thermoplastic elastomer, with a thickness of 0.8 mm when not filled with water, and a maximum diameter of 8 cm after being filled with water.

[0038] The water injection pipe 3 is 25 cm long and 2.5 mm in diameter, and is seamlessly welded to the water bag 2 and is provided with a sealing cap. The elastic protective layer 4 is made of polyurethane, 1 mm thick, and has a fine anti-skid texture on the surface.

[0039] During operation, first insert the dilator with the tube core 1 into the cervix of the parturient. After the position is confirmed, carefully take out the tube core 1, slowly inject water at a rate of 5 ml per second through the water injection tube 3, observe the pressure value inside the water bag 2 on the external display device, and when the pressure reaches the preset 15 kPa, stop injecting water to complete the cervical dilation. The device includes a tube core 1 and a water bag 2 arranged on the outer wall of the tube core 1. A water injection tube 3 is also provided on one side of the water bag 2. The tube core 1 is inserted into the cervix, and then the internal tube core 1 is taken out. The cervix is ​​dilated by injecting water into the water bag 2 through the water injection tube 3. The size of the cervical dilation is controllable and the speed is fast. It can be used after anesthesia, with little pain for the patient. In addition, the outer wall of the water bag 2 is provided with an elastic protective layer 4, which improves the service life of the water bag 2.

[0040] Example 2

[0041] This embodiment provides a specific structure of a water bag type cervical dilator, such as Figure 1-4 As shown, it includes a tube core 1 and a water bag 2 that is tightly attached to the outer wall of the tube core 1. The thickness of the water bag 2 when not filled with water is between 0.5-1 mm, and the maximum diameter after being filled with water and expanded can reach 10 cm. The tube core 1 and the water bag 2 are plug-in connected;

[0042] Among them, one side of the water bag 2 is connected to a water injection tube 3. The tube core 1 is inserted into the cervix and then taken out. The tube core 1 is made of medical-grade stainless steel material with good rigidity and smoothness to ensure smooth insertion into the cervix without scratching the tissue. The shape and size of the tube core 1 are carefully designed to adapt to the cervical anatomical structure of different patients, and are sterilized at high temperature and high pressure. Water is injected into the water bag 2 with the help of the water injection tube 3 to achieve cervical dilation.

[0043] A protective layer 4 is provided on the outer surface of the water bag 2. The protective layer 4 is made of polyurethane or silicone rubber material with high elasticity and wear resistance, and has good wear resistance and tensile resistance. The protective layer 4 fits tightly to the outer wall of the water bag 2 and is fixed by a special bonding process to ensure that it will not fall off during use. The surface of the protective layer 4 is provided with an anti-slip texture.

[0044] The water bladder 2 is made of medical-grade thermoplastic elastomer or natural rubber material with good flexibility and biocompatibility. Its shape and size are designed according to common cervical sizes. The water bladder 2 fits tightly with the tube core 1 to ensure a stable shape during insertion.

[0045] The connection between the water injection pipe 3 and the water bag 2 is seamlessly welded or sealed with a sealant to ensure that there is no leakage at the connection. A sealing cap is provided at the end of the water injection pipe 3. The water injection pipe 3 is connected to one side of the water bag 2. The water injection pipe 3 is made of durable medical plastic material with a moderate diameter, which is convenient for connecting a syringe for water injection. A one-way valve is also provided on the water injection pipe 3 to prevent the water in the water bag 2 from flowing back after water injection. A flow control valve is provided at one end of the water injection pipe 3 to accurately control the water injection speed and amount. The flow control valve is manually adjustable or electronically controlled, and its control accuracy can reach 0.1 ml / s.

[0046] An inner plate 5 is provided at the contact point between the water bag 2 and the tube core 1, a penetration head 9 is provided at the top of the tube core 1, and the penetration head 9 is located directly above the water bag 2. A limiting ring 6 is provided inside the inner plate 5, and a push plate 8 is provided on the outer wall of the tube core 1. After the tube core 1 is connected to the water bag 2, the push plate 8 is located on the lower surface of the limiting ring 6.

[0047] A pressure sensor 7 is provided inside the water bag 2. The measurement accuracy of the pressure sensor 7 is within ±0.1 kPa, and the pressure sensor 7 has waterproof and corrosion-resistant properties. The pressure sensor 7 is connected to an external display device for communication and displays the pressure value inside the water bag 2 in real time.

[0048] By adopting the above technical solution:

[0049] For the cervical dilation needs of a multiparous woman, a titanium alloy tube core with a length of 13 cm is selected, the water bag 2 is made of natural rubber, the thickness without water injection is 0.7 mm, and the maximum expandable diameter is 9 cm.

[0050] The water injection pipe 3 is 28 cm long and 2.8 mm in diameter. It is bonded to the water bag 2 by sealant, and the end sealing cap is tight. The elastic protective layer 4 is made of silicone rubber and has a thickness of 1.2 mm.

[0051] During operation, the dilator is inserted into the cervix, and after the tube core 1 is taken out, the flow control valve is used to accurately control the water injection speed to 8 ml per second. When the pressure sensor 7 inside the water bag 2 shows that the pressure reaches 18 kPa, the water injection is stopped to achieve cervical dilation. The device includes a tube core 1 and a water bag 2 arranged on the outer wall of the tube core 1. A water injection tube 3 is also provided on one side of the water bag 2. The tube core 1 is inserted into the cervix, and then the inner tube core 1 is taken out. The cervix is ​​expanded by injecting water into the water bag 2 through the water injection tube 3. The size of cervical dilation is controllable and the speed is fast. It can be used after anesthesia, and the patient suffers less pain. In addition, the outer wall of the water bag 2 is provided with an elastic protective layer 4, which increases the service life of the water bag 2.

[0052] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A water-bag cervical dilator, characterized in that: It comprises a tube core (1) and a water bag (2) which is tightly attached to the outer wall of the tube core (1), and the tube core (1) and the water bag (2) are plug-connected; Wherein, one side of the water bag (2) is connected to a water injection tube (3), and the tube core (1) is inserted into the interior of the cervix, and then the tube core (1) is taken out, and water is injected into the water bag (2) with the help of the water injection tube (3) to achieve cervical dilation.

2. The water-bag cervical dilator according to claim 1, characterized in that: The outer surface of the water bag (2) is provided with a protective layer (4), the protective layer (4) is made of polyurethane or silicone rubber material with high elasticity and wear resistance, and the surface of the protective layer (4) is provided with an anti-slip texture.

3. The water-bag cervical dilator according to claim 1, characterized in that: The water bag (2) is made of a medical-grade thermoplastic elastomer or natural rubber material with good flexibility and biocompatibility.

4. The water-bag cervical dilator according to claim 1, characterized in that: The connection between the water injection pipe (3) and the water bag (2) is achieved by seamless welding or sealing adhesive bonding to ensure that there is no leakage at the connection. A sealing cap is provided at the end of the water injection pipe (3).

5. The water-bag cervical dilator according to claim 1, characterized in that: An inner plate (5) is provided at the contact point between the water bag (2) and the tube core (1), and a limiting ring (6) is provided inside the inner plate (5).

6. The water-bag cervical dilator according to claim 1, characterized in that: A flow control valve is provided at one end of the water injection pipe (3) for accurately controlling the water injection speed and water injection amount.

7. The water-bag cervical dilator according to claim 5, characterized in that: The outer wall of the tube core (1) is provided with a push plate (8); after the tube core (1) is connected to the water bag (2), the push plate (8) is located on the lower surface of the limiting ring (6).

8. The water-bag cervical dilator according to claim 1, characterized in that: A pressure sensor (7) is provided inside the water bag (2), and the pressure sensor (7) is connected to an external display device for communication, and displays the pressure value inside the water bag (2) in real time.

9. The water-bag cervical dilator according to claim 1, characterized in that: A penetration head (9) is provided at the top end of the tube core (1), and the penetration head (9) is located directly above the water bag (2).

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