Transanal intestinal obstruction catheter assembly kit

Abstract

The utility model provides an anal type intestinal obstruction catheter combination kit, the outer cover body of guide wire subassembly is by the outer cover rear section, expansion balloon body and outer cover front section who links up in proper order, the inner diameter of outer cover rear section and expansion balloon body is greater than the outer diameter of guide wire inner cover, thereby leaving the clearance channel that can supply gas / liquid to pass between the outer cover body at outer cover rear section and expansion balloon body and guide wire inner cover, the outer cover front section is sealed and is pasted between the inside guide wire inner cover, thereby the front end of clearance channel is closed, expansion balloon body divides into two parts: the front section balloon body and rear section balloon body, in use, the front section balloon body expands the channel at the lesion, the rear section balloon body is placed in the anal pressure relief catheter front end part, and the front end part is pasted with the anal pressure relief catheter through expansion. The utility model can ensure that the anal pressure relief catheter front end part can effectively pass through the channel at the lesion, and one step is completed to expand and place the pipe, simplifies the step, and improves the treatment success rate.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a transanal intestinal obstruction catheter assembly kit. Background Technology

[0002] The transanal intestinal obstruction catheter kit is a medical device used to treat intestinal obstruction in surgical acute abdomen. It includes an anal decompression catheter assembly and a guidewire assembly. The anal decompression catheter assembly has a thicker tip with a flat end, making the passage at the intestinal lesion site relatively narrow. Only the guidewire assembly can pass through, while the tip of the anal decompression catheter is blocked and difficult to pass through. The passage at the lesion site must be dilated to allow passage. However, existing guidewire assemblies typically do not have dilation capabilities. A separate dilator is needed to pass through the narrowed area to dilate it, then withdraw it, and then the anal decompression catheter is advanced through the narrowed area. However, because intestinal bends (such as the descending-sigmoid junction and rectosigmoid junction) are high-incidence areas for tumors, the growth direction, shape, size, and hardness of tumor tissue accumulate at these bends. When obstruction occurs, the pressure from all directions within the intestinal lumen is very high. This can cause the narrowed area to revert to a state where the anal decompression catheter cannot pass through after the dilator is withdrawn, resulting in extremely low efficiency and potentially treatment failure. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a transanal intestinal obstruction catheter assembly kit, the specific technical solution of which is as follows:

[0004] A transanal intestinal obstruction catheter assembly kit includes an anal decompression catheter assembly and a guidewire assembly. The guidewire assembly includes a guidewire, an inner guidewire sheath, and an outer sheath. The guidewire is slidably fitted within the inner guidewire sheath, which is fitted within the outer sheath. The outer sheath consists of a rear section, a dilating balloon, and a front section connected sequentially. The inner diameter of the rear section and the dilating balloon is larger than the outer diameter of the inner guidewire sheath, thus leaving a gap channel between the outer sheath and the inner guidewire sheath at the rear section and the dilating balloon for gas / liquid to pass through. The front section of the outer sheath is sealed and fitted to the inner guidewire sheath, thereby closing the front end of the gap channel.

[0005] The dilating balloon is divided into two parts: the anterior balloon and the posterior balloon. When in use, the anterior balloon extends beyond the anterior end of the anal decompression catheter to dilate the passage at the lesion site; the posterior balloon is placed inside the anterior end of the anal decompression catheter and is dilated to fit against the anterior end of the anal decompression catheter.

[0006] Furthermore, a constraint ring is fixedly fitted in the middle of the expandable balloon body, dividing the expandable balloon body into an anterior balloon body and a posterior balloon body with the constraint ring as the boundary.

[0007] Furthermore, the inner wall of the anal decompression catheter has an annular embedding groove near the port, which can be embedded in the posterior balloon body when it expands.

[0008] Furthermore, the anal decompression catheter tip 7a has an annular shoulder formed on the inner wall at the port.

[0009] Furthermore, an annular shoulder is formed on the inner wall of the anal decompression catheter at the port end, and a radially protruding annular limiting boss is formed at the rear part of the balloon body near the restraint ring.

[0010] Furthermore, the front end of the limiting boss also has a ring-shaped chamfered slope.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] This invention ensures that the tip of the anal decompression catheter can effectively pass through the lesion site, allowing dilation and catheter placement to be completed in one step, simplifying the process and improving the treatment success rate. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0014] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the guidewire assembly with expansion function of this utility model;

[0015] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0016] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the combination kit of this utility model;

[0017] Figure 4 This is a cross-sectional schematic diagram of a second embodiment of the combination kit of this utility model;

[0018] Figure 5 This is a cross-sectional schematic diagram of a third embodiment of the combination kit of this utility model;

[0019] Figure 6 for Figure 5 Enlarged schematic diagram of part B;

[0020] Figure 7 This is a cross-sectional schematic diagram of another embodiment of the shape of the anterior balloon body after expansion;

[0021] Figure 8This is a cross-sectional schematic diagram of another embodiment of the shape of the anterior balloon body after expansion.

[0022] Explanation of reference numerals in the attached figures:

[0023] Guidewire 1; Inner sheath of guidewire 2; Front end 21; Front section of outer sheath 3; Guidewire balloon 4; Front balloon body 41, 41a; Rear balloon body 42; Rear section of outer sheath 5; Restraint ring 6; Limiting boss 61; Chamfered ramp 611; Front end of anal decompression catheter 7a, 7b; Embedding groove 71; Shoulder body 72; Gap channel 8. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 The figure shows a cross-sectional schematic diagram of an embodiment of the guidewire assembly in the transanal intestinal obstruction catheter kit of this utility model. As shown in the figure, the guidewire assembly includes a guidewire 1, a guidewire inner sleeve 2, and an outer sleeve. The guidewire 1 is fitted inside the guidewire inner sleeve 2, and the guidewire inner sleeve 2 is fitted inside the outer sleeve. The guidewire 1 can slide forward or retract within the guidewire inner sleeve 2. The structural improvement is as follows:

[0027] The outer sheath consists of a rear section 5, an inflatable balloon, and a front section 3 connected sequentially. The inner diameter of the rear section 5 and the inflatable balloon is larger than the outer diameter of the guidewire inner sheath 2, thus leaving a gap channel 8 between the outer sheath and the guidewire inner sheath 2 at the rear section 5 and the inflatable balloon for gas / liquid to pass through; combined with Figure 2 As shown, the front section 3 of the outer sheath is sealed to the inner guidewire sheath 2, thereby sealing the front end of the gap channel 8. Therefore, when pressure is applied through the gap channel, the dilating balloon can dilate.

[0028] Preferred, such as Figure 2 As shown, the front end 21 of the guidewire inner sleeve 2 forms an inwardly converging funnel shape, thereby sealing the gap between the guidewire and the front end of the guidewire inner sleeve 2 and preventing liquid from entering the guidewire inner sleeve 2 from this point.

[0029] Furthermore, this invention divides the dilating balloon into two parts: a front balloon 41 and a rear balloon 42. In use, the front balloon 41 extends beyond the anal decompression catheter's tip to dilate the channel at the lesion site, allowing the anal decompression catheter's tip to pass through. The rear balloon 42 is placed inside the anal decompression catheter's tip, and its expansion strengthens the connection with the tip, ensuring the guidewire assembly and the anal decompression catheter's tip can advance synchronously, thus better ensuring the anal decompression catheter's tip passes smoothly through the lesion site. After passage, air is released through the gap channel, and both the front and rear balloons retract, allowing the guidewire assembly to be withdrawn entirely for replacement with other components for subsequent operations.

[0030] This utility model provides an embodiment of dividing the expandable balloon into two parts: as shown in the figure, a constraint ring 6 is fixedly sleeved in the middle of the expandable balloon. Due to the constraint effect of the constraint ring 6, when the gap channel is ventilated and pressurized, the expandable balloon is divided into a front balloon 41 and a rear balloon 42 with the constraint ring 6 as the boundary.

[0031] Preferably, to further enhance the bonding strength between the posterior balloon body 42 and the distal end of the anal decompression catheter during dilation, the present invention also provides the following structural improvement embodiments:

[0032] like Figure 3 In the embodiment shown: the inner wall of the anal decompression catheter at the front end 7a has an annular embedding groove 71 near the port. When the rear balloon 42 expands, it can be embedded in the embedding groove 71, and the combination of the two enhances the bonding strength.

[0033] like Figure 4 In another embodiment shown: the anal decompression catheter has an annular shoulder 72 formed on the inner wall of the port end 7a, and the binding strength is enhanced by the cooperation between the expanded rear balloon 42 and the shoulder 72.

[0034] like Figure 5 and Figure 6 In the embodiment shown: In addition to an annular shoulder 72 formed on the inner wall of the anal decompression catheter tip 7a at the port, a radially protruding annular limiting boss 61 is also formed on the rear part of the constraint ring 6 near the rear section of the balloon 42. The binding strength is enhanced by the cooperation between the limiting boss 61 of the constraint ring 6 and the shoulder 72. The constraint ring 6 replaces the rear section of the balloon 42, avoiding damage to the rear section of the balloon 42 and enhancing reliability.

[0035] Preferably, the front end of the limiting boss 61 is also formed with an annular chamfered slope 611, which enhances the bonding strength and also serves to center the guide wire assembly at the orifice enclosed by the shoulder body 72.

[0036] Furthermore, the expansion state of the anterior segment of the balloon body, in addition to... Figures 3 to 5 In addition to the shapes shown, it can also be like... Figure 7 As shown, the expanded anterior balloon 41a is a cone shape with a gradually increasing radius from front to back. Its cone base is located at the front port of the restraint ring 6, and the cone base abuts against the end face of the anterior end portion 7b of the anal decompression catheter. This allows the forward movement of the anterior balloon 41a within the narrow passage to be aided by the anterior end portion 7b of the anal decompression catheter. Preferably, the maximum radius of the expanded anterior balloon 41a is slightly greater than or equal to the radius of the anterior end portion 7b of the anal decompression catheter. Of course, Figures 3 to 5 The anterior segment of the balloon shown can also be treated in this way, making it easier to propel the balloon.

[0037] Figure 8 A schematic diagram of an embodiment of a third shape after the anterior balloon body is expanded is shown. As shown, after the anterior balloon body 41b is expanded, its anterior part is conical and its posterior part is cylindrical.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transanal intestinal obstruction catheter assembly kit, comprising an anal decompression catheter assembly and a guidewire assembly, wherein the guidewire assembly comprises a guidewire, an inner guidewire sheath, and an outer sheath, the guidewire being slidably fitted within the inner guidewire sheath, and the inner guidewire sheath being fitted within the outer sheath, characterized in that: The outer sheath consists of a rear section, an inflatable balloon, and an anterior section connected in sequence. The inner diameter of the rear section and the inflatable balloon is larger than the outer diameter of the guidewire inner sheath, thus leaving a gap channel between the outer sheath and the guidewire inner sheath at the rear section and the inflatable balloon for gas / liquid to pass through. The anterior section is sealed and fitted with the inner guidewire sheath, thereby sealing the front end of the gap channel. The dilating balloon is divided into two parts: the anterior balloon and the posterior balloon. When in use, the anterior balloon extends beyond the anterior end of the anal decompression catheter to dilate the passage at the lesion site; the posterior balloon is placed inside the anterior end of the anal decompression catheter and is dilated to fit against the anterior end of the anal decompression catheter.

2. The transanal intestinal obstruction catheter assembly kit according to claim 1, characterized in that: A constraint ring is fixedly fitted in the middle of the expandable balloon body, dividing the expandable balloon body into an anterior balloon body and a posterior balloon body with the constraint ring as the boundary.

3. The transanal intestinal obstruction catheter assembly kit according to claim 1 or 2, characterized in that: The anterior end of the anal decompression catheter has an annular insertion groove near the port, which the posterior balloon can embed into when it expands.

4. The transanal intestinal obstruction catheter assembly kit according to claim 1 or 2, characterized in that: The anterior end (7a) of the anal decompression catheter has an annular shoulder formed on the inner wall at the port.

5. The transanal intestinal obstruction catheter assembly kit according to claim 2, characterized in that: The anal decompression catheter has an annular shoulder formed on the inner wall at the port of the anal end, and a radially protruding annular limiting boss is formed at the rear part of the balloon body near the restraint ring.

6. The transanal intestinal obstruction catheter assembly kit according to claim 5, characterized in that: The front end of the limiting boss also has a ring-shaped chamfered slope.

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