Intestinal stoma dilator

Abstract

The invention discloses an enterostomy dilator which comprises a dilation plug and a dilation assembly, the dilation plug is of an inflation expansion structure and comprises a plug ball part, a dilation part and a blocking ring part, inflation is conducted through an inflation valve element, the plug ball part and the blocking ring part are made to expand synchronously, stable fixation of an enterostomy is achieved, and the device is prevented from slipping or shifting. The expansion assembly comprises a rotating guide disc, a fixed guide disc and a plurality of expansion rod heads, a first guide groove is formed in the surface of the rotating guide disc, a second guide groove is formed in the surface of the fixed guide disc, and the expansion rod heads slide in the radial direction under constraint of the guide grooves. The expansion rod head is driven to move along the guide groove by rotating the rotating guide disc, progressive expansion is achieved, and mechanical locking in the expansion state is achieved through mutual matching of the abutting elastic piece and the abutting tooth ring. By adopting the structural design of inflation fixation and rotary dilation, compared with a traditional rigid dilator, the dilator has higher safety, stability and adjusting precision and is suitable for postoperative recovery and long-term maintenance, and the use comfort and life quality of a patient are improved.

Description

Technical Field

[0001] The invention relates to the technical field of intestinal stoma dilation, in particular to an intestinal stoma dilator. Background Art

[0002] In clinical practice, colostomy is a common surgical procedure, mainly used for patients after colorectal cancer surgery, inflammatory bowel disease patients or other patients who need to establish an artificial intestinal outlet. These patients need colostomy dilation after surgery to maintain the patency of the stoma and prevent stenosis caused by tissue scar hyperplasia or contraction. However, the existing colostomy dilation devices have the following technical defects during use: The fixation method is unreliable and prone to displacement or falling off: Existing intestinal stoma dilation devices are usually fixed with a rigid structure or a single mechanical buckle. Under uneven force, the device is prone to slippage or displacement, affecting the dilation effect. Since the tissue around the stoma is relatively fragile, the rigid dilation device may cause additional mechanical damage to the stoma when subjected to force, increasing the risk of postoperative complications.

[0003] Uneven expansion method can easily cause discomfort to patients or tissue damage: Traditional expanders are generally expanded by manual expansion or rigid propulsion. The expansion process lacks fine control and may lead to uneven force, causing tissue strain or discomfort. Because the expansion method is too mechanical, patients may feel strong discomfort during the expansion process and even need to replace expanders of different sizes in stages, which increases the difficulty of use and medical care costs.

[0004] Insufficient adjustment accuracy makes it difficult to achieve progressive expansion: Most of the existing intestinal stoma dilators use fixed diameter expansion. During the expansion process, patients can only adjust by replacing expansion devices of different specifications. This method is not only cumbersome to operate, but also difficult to adapt to the individual needs of patients. Due to the lack of precise guiding mechanism, radial movement may be uneven during the expansion process, affecting the smooth expansion and even causing expansion failure.

[0005] In view of this, research and improvement are conducted on the existing problems, and an intestinal stoma dilator is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Summary of the invention

[0006] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0007] To this end, the technical solution adopted by the present invention is: an enterostomy dilator, including: a dilator head, an expansion component, a guide mechanism and a locking mechanism.

[0008] 1. Expander plug The expander is used to insert into the enterostomy and fix it by inflation, including: Ball part of the plug: It is mainly used to be placed inside the intestine. After inflation, it forms an expanded structure to prevent the plug head from falling out.

[0009] Expanding part: connects the plug ball part and the blocking ring part, and is used to provide radial support to ensure that the expander head is stably deployed at the intestinal stoma.

[0010] Blocking ring part: After inflation, it is located outside the intestinal stoma and cooperates with the plug ball part to fix the expansion plug head to prevent it from slipping.

[0011] Connecting air channel: It is arranged inside the flared part, so that the ball part and the baffle ring part form a connecting air chamber, ensuring synchronous inflation and enhancing the fixing effect.

[0012] Inflation valve core: connected to the inflation device, adopts a one-way air valve core structure to ensure that the expansion plug head can remain in an expanded state after inflation and will not cause expansion failure due to gas leakage.

[0013] The entire expander head is made of medical rubber material to ensure good biocompatibility and flexibility, reduce irritation to intestinal tissue, and improve patient comfort.

[0014] 2. Expansion components The dilation kit is used to achieve progressive dilation of the stoma and includes: Rotating guide plate: Rotating to drive the expansion rod head to expand radially, and a first guide groove is provided on the surface to constrain the movement trajectory of the expansion rod head.

[0015] Fixed guide plate: As a fixed supporting component, a second guide groove is provided on its surface, and a slide groove is provided on one side of the second guide groove to provide additional movement guidance and improve the stability of the expansion rod head.

[0016] Spreader rod head: One end of the spreader rod head is slidably connected to the first guide groove and the second guide groove, and the other end is sleeved on the inner side of the expander plug head. The surface of the spreader rod head is sleeved with a slip ring, which cooperates with the slide groove to ensure the smooth movement of the spreader rod head and prevent shaking or jamming.

[0017] The expansion component drives the expansion rod head to move radially through the relative rotation between the rotating guide plate and the fixed guide plate, so that the intestinal stoma can be gradually expanded.

[0018] 3. Guiding mechanism The present invention provides a set of precise guiding mechanisms to ensure a smooth and controllable expansion process: The first guide groove is located on the rotating guide plate and adopts an arc-shaped groove design with different center distances at both ends to provide a smoother expansion process.

[0019] The second guide groove is arranged on the fixed guide plate and can be a straight groove or an arc groove. Its arrangement direction is opposite to that of the first guide groove to ensure that the expansion rod head is smoothly advanced during the expansion process.

[0020] Slide groove: It is arranged on one side of the second guide groove and cooperates with the slip ring on the expansion rod head to improve the stability of the expansion movement and prevent the expansion rod head from deviating due to uneven force.

[0021] 4. Locking mechanism In order to prevent accidental retraction during expansion, the present invention provides a reliable locking mechanism: Spring-loaded piece: It is arranged on the outer periphery of the guide plate and is used to provide elastic snapping effect.

[0022] Gear ring: It is arranged on the outer periphery of the fixed guide plate and cooperates with the spring plate to form a mechanical lock after the expansion component completes the expansion, thereby ensuring the stability of the expansion state.

[0023] During the expansion process, after the rotating guide disc and the fixed guide disc rotate to the target angle, the spring plate abuts against the toothed ring to achieve automatic locking, preventing retraction in the expanded state and ensuring the durability and safety of the expansion effect.

[0024] The beneficial effects achieved by the present invention are: 1. In the present invention, an inflatable expansion plug head is used, and air is inflated into the plug ball part and the blocking ring part through the inflation valve core, so that they expand synchronously and fit tightly against the inner and outer sides of the intestinal stoma to achieve stable fixation. The inflated expansion plug head forms a reliable mechanical support, effectively preventing the device from slipping due to external force or body movement, and improving the stability of the expansion operation.

[0025] 2. In the present invention, by rotating the rotary guide disc, the **expansion rod head** is driven to slide radially along the first guide groove and the second guide groove to achieve progressive expansion. This design makes the expansion process smoother, avoids damage to the tissue caused by sudden force, and reduces the patient's discomfort and improves the user experience.

[0026] 3. The present invention adopts an inflatable fixed and rotating expansion structure, which has higher adaptability and safety than the traditional rigid dilator, and is particularly suitable for long-term intestinal stoma dilation treatment. The dilator is not only suitable for the postoperative recovery stage, but also for long-term maintenance, and is suitable for the needs of patients at different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is an enlarged schematic diagram of an expansion component and a local surface structure thereof according to an embodiment of the present invention; Figure 3 A schematic diagram of the expansion plug structure of an embodiment of the present invention; Figure 4 A schematic diagram of the cross-sectional structure of an expansion plug head according to an embodiment of the present invention; Figure 5 A schematic diagram of the exploded structure of an expansion component according to an embodiment of the present invention; Figure 6 The figure is a schematic diagram of the surface structure of a fixed guide plate according to an embodiment of the present invention.

[0028] Reference numerals: 100, expansion assembly; 110, rotating guide plate; 120, fixed guide plate; 130, expansion rod head; 140, first guide groove; 150, second guide groove; 111, spring plate; 121, gear ring; 122, bearing ring; 131, sliding ring; 151, sliding groove; 200, expansion plug head; 210, inflation valve core; 201, plug ball portion; 202, expansion portion; 203, resistance ring portion; 204, connecting airway. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0030] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0031] The following is combined with Figure 1-Figure 6 An enterostomy dilator provided in some embodiments of the present invention is described.

[0032] Example 1 The present invention provides an enterostomy dilator, such as Figures 1 to 6 As shown, it includes an expansion component 100 and an expansion plug head 200.

[0033] The expansion assembly 100 includes: The rotating guide plate 110 has a plurality of first guide grooves 140 on its surface for guiding the radial movement of the expansion rod head 130 .

[0034] The fixed guide plate 120 has a plurality of second guide grooves 150 formed on its surface, and a slide groove 151 is provided on one side of the second guide groove 150 so as to limit the movement track of the expansion rod head 130 .

[0035] The expansion rod head 130 has one end slidably sleeved on the inner side of the first guide groove 140 and the second guide groove 150 , and the other end sleeved on the inner side of the expansion plug head 200 , and slidably sleeved in the slide groove 151 through the slip ring 131 to improve the movement stability of the expansion rod head 130 .

[0036] The elastic sheet 111 and the gear ring 121 are disposed between the rotating guide plate 110 and the fixed guide plate 120 and are used to lock the position of the expansion assembly 100 after expansion.

[0037] The expansion plug 200 comprises: The plug ball portion 201 is located inside the intestinal stoma after being inflated to prevent the expansion plug head 200 from shifting.

[0038] The flared portion 202 connects the ball portion 201 and the blocking ring portion 203 to provide radial support during the expansion process.

[0039] The blocking ring portion 203 is located outside the intestinal stoma after being inflated, and cooperates with the plug ball portion 201 to fix the expansion plug head 200 .

[0040] The communicating air passage 204 is arranged inside the flared portion 202 to form a communicating air chamber inside the ball plug portion 201 and the baffle ring portion 203 to achieve synchronous expansion.

[0041] Inflation valve core 210: connected to the inflation device, and realizes inflation and expansion inside the expansion plug head 200 through a one-way inflation structure.

[0042] Example 2 In this embodiment, the expansion plug head 200 is made of medical rubber material to ensure good biocompatibility and sealing. When in use, the expansion plug head 200 is first inserted into the intestinal stoma, and the inflation valve core 210 is inflated to make the plug ball part 201 and the blocking ring part 203 expand synchronously, so as to be firmly fixed at both ends of the intestinal stoma to prevent the expansion plug head 200 from accidentally falling out or shifting.

[0043] The steps for using the expansion assembly 100 are as follows: The rotating guide plate 110 is rotated to deflect relative to the fixed guide plate 120 , and the expansion rod head 130 slides radially in the first guide groove 140 and the second guide groove 150 to gradually expand the intestinal stoma.

[0044] Locking the expanded state: The position after expansion is fixed by the abutment between the elastic sheet 111 and the toothed ring 121 .

[0045] Continuous expansion: After the intestinal stoma adapts to the current expansion state, the transfer disc 110 is rotated again to further expand the expansion range, and the process is repeated until the target size is reached.

[0046] Example 3 In another embodiment, in order to further improve the expansion accuracy, the first guide groove 140 adopts an arc groove structure, and the center distances of the two ends are different to ensure a smoother expansion movement. The second guide groove 150 can be a straight groove or an arc groove, and its arrangement direction is opposite to the first guide groove 140 to achieve a reasonable movement trajectory.

[0047] In addition, in order to improve the stability of the expansion rod head 130, a slip ring 131 is arranged in the slide groove 151 in this embodiment, so that the expansion rod head 130 can slide smoothly in the slide groove 151 to prevent deviation or shaking during the expansion process, thereby ensuring the accuracy and safety of the expansion movement.

[0048] Example 4 In this embodiment, in order to improve the reliability of the enterostomy dilator, a bearing ring 122 is fixedly installed on the outer periphery of the fixed guide plate 120 to enhance the rigidity of the fixed guide plate 120 and prevent deformation caused by long-term stress. In addition, the expansion portion 202 of the expansion plug head 200 provides radial support during the expansion process, making the expansion process more stable and reducing damage to the enterostomy tissue.

[0049] When in use, the expansion plug head 200 is first fixed to the intestinal stoma by inflation, and then the expansion component 100 is gradually expanded by rotating the turntable 110 and remains stable at different expansion stages to meet the patient's progressive expansion needs.

[0050] The working principle and use process of the present invention: The present invention relates to an intestinal stoma dilator, comprising an expansion component 100 and an expansion plug head 200. The expansion plug head 200 is mainly used to be inserted into the intestinal stoma and inflated and fixed, while the expansion component 100 is used to achieve progressive expansion of the intestinal stoma. Its working principle is as follows: Inflation and fixation of the expansion plug 200: The expansion plug 200 is made of medical rubber material as a whole, including an integrally formed plug ball portion 201, a flared portion 202 and a resistance ring portion 203. Before inflation, the expansion plug 200 is inserted into the intestinal stoma, so that the plug ball portion 201 is located in the intestinal cavity, the resistance ring portion 203 is located outside the intestinal stoma, and the flared portion 202 forms a seal. The inflation device is connected through the inflation valve core 210, and the inside of the plug ball portion 201 is inflated to expand it and synchronously inflate the resistance ring portion 203 through the connecting airway 204, forming an effective intestinal stoma seal and fixation to prevent the expansion plug 200 from slipping or shifting.

[0051] Expansion adjustment of the expansion assembly 100: The expansion assembly 100 includes a rotating guide plate 110, a fixed guide plate 120 and a plurality of expansion rod heads 130. Through the relative rotation of the rotating guide plate 110 and the fixed guide plate 120, the expansion rod head 130 slides along the first guide groove 140 and the second guide groove 150 to generate radial expansion movement. Among them, the first guide groove 140 adopts an arc groove structure, and the second guide groove 150 adopts a straight groove or an arc groove, and the arrangement directions of the two are opposite to each other, so as to realize the smooth expansion movement of the expansion rod head 130. The slip ring 131 slides in the slide groove 151 to improve the stability of the movement of the expansion rod head 130.

[0052] Locking of the expansion position: After the expansion reaches the target position, the rotating guide plate 110 and the fixed guide plate 120 are mechanically locked by the spring plate 111 and the toothed ring 121 to prevent the expansion assembly 100 from accidentally retracting. Through the locking mechanism, the expansion state can be stably maintained at different expansion stages, so that the intestinal stoma gradually adapts to the expansion size.

[0053] Usage Process 1. Preprocessing stage Clean and sterilize the expansion plug 200 and the expansion assembly 100 to ensure aseptic operation. Connect the inflation device to the inflation valve core 210 to ensure that the seal is intact.

[0054] 2. Insert expansion plug 200 The expansion plug head 200 is gently inserted into the intestinal stoma, so that the plug ball portion 201 enters the intestinal cavity, the expansion portion 202 is located inside the intestinal stoma, and the resistance ring portion 203 is located outside the intestinal stoma. The plug ball portion 201 is inflated to an appropriate size through an inflation device, and the resistance ring portion 203 is expanded synchronously through the connecting airway 204, thereby fixing the position of the expansion plug head 200.

[0055] 3. Perform expansion operation The rotating guide plate 110 is rotated to deflect relative to the fixed guide plate 120, driving the expansion rod head 130 to slide radially along the first guide groove 140 and the second guide groove 150, thereby realizing the gradual expansion of the intestinal stoma. The expansion portion 202 provides radial support to make the intestinal stoma evenly stressed and prevent tissue damage.

[0056] 4. Maintain expansion After expanding to a preset size, the turntable 110 is released, so that the elastic sheet 111 and the toothed ring 121 abut against each other, thereby locking and maintaining the expanded state. The expanded state is maintained for a period of time to allow the intestinal stoma tissue to gradually adapt.

[0057] 5. Gradually expand As the intestinal stoma adapts to the current expansion state, the user can rotate the turntable 110 again to further expand the expansion size and repeat the locking process. This step can be expanded multiple times according to the doctor's instructions until the intestinal stoma reaches the set target size.

[0058] 6. End the expansion process When the expansion is completed, the lock is released and the expansion size is slowly reduced to make the intestinal stoma enter a stable state. The inflation device is released to release the gas in the plug ball part 201 and the blocking ring part 203, so that the expansion plug head 200 is reduced to a state where it can be pulled out. The expansion plug head 200 is gently pulled out to complete the expansion operation.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An intestinal stoma dilator, characterized in that: include: The invention comprises an expansion assembly (100) and an expansion plug head (200), wherein the expansion assembly (100) comprises a rotating guide plate (110), a fixed guide plate (120) and a plurality of expansion rod heads (130), wherein a plurality of first guide grooves (140) are formed on the surface of the rotating guide plate (110), a plurality of second guide grooves (150) are formed on the surface of the fixed guide plate (120), a slide groove (151) is formed on one side of the second guide groove (150), a slip ring sheet (131) is sleeved on the surface of the expansion rod head (130) and is slidably sleeved on the inner side of the slide groove (151), and one end of the expansion rod head (130) is provided with a plurality of first guide grooves (140) and a plurality of second guide grooves (150) are formed on the surface of the expansion rod head (130). The expansion rod head (130) is slidably sleeved on the inner side of the first guide groove (140) and the second guide groove (150), and the other end of the expansion rod head (130) is sleeved on the inner side of the expansion plug head (200). The expansion plug head (200) comprises a plug ball part (201), a flared part (202) and a resistance ring part (203) which are integrally formed and sequentially connected. The interior of the plug ball part (201) and the resistance ring part (203) are hollow structures. The inner side of the flared part (202) is provided with a plurality of connecting airways (204) for connecting the plug ball part (201) and the resistance ring part (203).

2. The intestinal stoma dilator according to claim 1, characterized in that: The expansion plug head (200) is a component made of medical rubber material, and the plug ball portion (201) of the expansion plug head (200) is connected to an inflation device via an inflation valve core (210) to achieve synchronous inflation of the plug ball portion (201) and the block ring portion (203), and the inflation valve core (210) is a one-way air valve core structure.

3. The intestinal stoma dilator according to claim 1, characterized in that: The expansion portion (202) provides radial support during the movement of the expansion rod head (130), thereby providing expansion support for the intestinal stoma.

4. The intestinal stoma dilator according to claim 1, characterized in that: The resistance ring portion (203) is located outside the intestinal stoma, the plug ball portion (201) is located inside the intestinal cavity, and the expansion portion (202) is used to connect the resistance ring portion (203) and the plug ball portion (201) to form a complete plug head structure for sealing the intestinal stoma.

5. The intestinal stoma dilator according to claim 1, characterized in that: A bearing ring (122) for connecting to the rotating guide plate (110) is fixedly mounted on the surface of the fixed guide plate (120); the rotating guide plate (110) and the fixed guide plate (120) rotate relative to each other, so that the expansion rod head (130) moves radially along the first guide groove (140) and the second guide groove (150) to adjust the expansion degree of the expander.

6. The intestinal stoma dilator according to claim 1, characterized in that: The outer circumference of the rotating guide disc (110) is provided with a spring-resisting piece (111), and the outer circumference of the fixed guide disc (120) is fixedly provided with a gear ring (121), and the spring-resisting piece (111) and the gear ring (121) are in mutual contact, so as to realize the locking function of the rotating guide disc (110) and the fixed guide disc (120) after deflection.

7. The intestinal stoma dilator according to claim 1, characterized in that: When the expansion rod head (130) is slidably sleeved in the first guide groove (140) and the second guide groove (150), the sliding ring sheet (131) is adapted to the slide groove (151) to improve the stability of the movement of the expansion rod head (130).

8. The intestinal stoma dilator according to claim 1, characterized in that: The first guide groove (140) is in the shape of an arc groove and the two ends have different distances from the center of the rotating guide plate (110); the second guide groove (150) is a straight groove or an arc groove; and the arrangement direction of the second guide groove (150) is opposite to that of the first guide groove (140).

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