Balloon dilatation catheter

Abstract

The utility model discloses a balloon dilatation catheter, which belongs to the technical field of medical supplies and comprises a catheter main body, a dilatation catheter and a dilatation balloon body, the dilatation balloon body is arranged on the periphery of the catheter main body and forms a balloon body which is filled with liquid to form a dilatation state, the dilatation catheter is communicated with the dilatation balloon body, and the dilatation catheter is communicated with the dilatation balloon body. The catheter is characterized by comprising a positioning expansion body arranged along the line of the catheter body, an expansion driving end is arranged at the outer end of the catheter body, and the positioning expansion body is connected with the expansion driving end through an expansion conduction component arranged along the line of the catheter body. The expansion driving end drives the positioning expansion body through the expansion conduction component to form an expansion body protruding towards the periphery of the catheter body. According to the catheter, accurate fixed-point expansion is ensured through the positioning expansion body, damage to healthy tissue is reduced, the operation stability and controllability are improved, the operation process is simplified, the complication risk is reduced, and meanwhile the safety and effectiveness of treatment and the comfort level of a patient are improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical supplies technology, and in particular relates to a balloon dilation catheter. Background Technology

[0002] Currently, for neurogenic cricopharyngeal achalasia caused by brain injuries such as stroke, traumatic brain injury, and radiation encephalopathy, in addition to traditional rehabilitation methods such as swallowing function training and feeding training, catheter balloon dilation, as an innovative treatment method, has gradually gained clinical acceptance. The modified catheter balloon dilation is a safe, non-invasive, simple, and effective treatment method. It mainly restores the tension and elasticity of the cricopharyngeal muscle to normal through mechanical means, thereby improving its function. This method involves inserting a balloon-loaded catheter into the cricopharyngeal muscle, inflating the balloon by injecting water, and then pulling the catheter from bottom to top to gradually dilate the cricopharyngeal muscle. The dilated balloon stimulates the esophageal mucosa, enhancing reflexive swallowing ability through the medullary reflex arc, promoting brain neuromodulation, and aiding in the recovery of cricopharyngeal muscle function. Furthermore, auditory and visual stimulation can also activate the cerebral cortex and subcortical structures, further promoting the improvement of cricopharyngeal muscle function.

[0003] Current esophageal dilation methods have the following shortcomings and drawbacks: First, the manipulation of the catheter can cause significant discomfort to patients, and in severe cases, can lead to nausea and other symptoms, affecting the treatment effect. Second, repeated traction and withdrawal of the catheter in the esophagus may cause damage to the esophageal mucosa, increasing the risk of infection and inflammation. Furthermore, mechanical dilation may not be able to precisely control the dilation force and range, posing a risk of over-dilation or under-dilation, affecting the effectiveness and safety of the treatment. Due to these shortcomings, the patient's treatment experience and recovery process may be negatively impacted, thus limiting the widespread clinical application of these methods.

[0004] Targeted esophageal dilation offers several advantages over traditional dilation methods. First, by repeatedly contracting and dilating at the target location, targeted dilation avoids the repeated traction and jerking of the catheter within the esophagus, significantly reducing patient discomfort and nausea, and improving patient tolerance and comfort. Second, targeted dilation ensures the dilation sac remains precisely positioned at the lesion site, allowing for accurate dilation and avoiding over- or under-dilation issues that can occur with traditional methods due to improper technique, thus enhancing treatment safety and effectiveness. Furthermore, targeted dilation reduces mechanical irritation to other parts of the esophagus, lowering the risk of complications such as mucosal damage and infection. Simultaneously, this method makes the dilation procedure more controllable, reducing uncertainties for the surgeon and improving surgical success rates and treatment outcomes. Therefore, targeted esophageal dilation is significantly superior to traditional dilation methods in terms of precision, safety, and patient comfort.

[0005] Precise catheter positioning is essential for targeted esophageal dilation. Only by ensuring the catheter remains stably positioned at the lesion site can effective dilation be achieved, avoiding damage to healthy tissue and increased patient discomfort. Therefore, it is necessary to redesign existing catheters to include positioning capabilities to meet the requirements of targeted dilation. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model provides a balloon dilation catheter that solves the problems of discomfort and infection risk caused by the use of traditional esophageal catheters.

[0007] This invention is implemented as follows: a balloon dilation catheter includes a catheter body, a dilation fluid guide tube, and a dilation balloon. The dilation balloon is located on the periphery of the catheter body and forms a balloon filled with liquid to form an expanded state. The dilation fluid guide tube communicates with the dilation balloon. The invention is characterized by including a positioning expansion body disposed along the catheter body. The outer end of the catheter body is provided with an expansion driving end. The positioning expansion body is connected to the expansion driving end via an expansion conduction component along the catheter body, and the expansion driving end drives the positioning expansion body through the expansion conduction component to form an expansion body protruding towards the periphery of the catheter body.

[0008] In the above technical solution, preferably, the positioning expansion body is a capsule filled with liquid to form an expanded state, the expansion conduction component is an expansion liquid guide tube whose end is connected to the positioning expansion body, and the expansion driving end is an expansion injection port located at the end of the expansion conduction component.

[0009] In the above technical solution, preferably, the positioning expansion body includes an upper sleeve, a lower sleeve, and N elastic ribs connected between the upper sleeve and the lower sleeve. The upper sleeve is fixed to the conduit body, the lower sleeve is fitted onto the conduit body and moves along the conduit, and the elastic ribs are evenly spaced around the conduit body. The lower sleeve moves closer to the upper sleeve, causing the elastic ribs to form an outwardly expanding lantern-shaped expansion structure. The expansion driving end includes a threaded tube and a threaded sleeve. The threaded tube is fitted and fixed to the end of the conduit body and has threads on the outside. The threaded sleeve has threads on the inside and is threaded onto the outside of the threaded tube. The expansion conducting component is a wire that runs along the conduit body. One end of the wire is connected to the lower sleeve of the positioning expansion body, and the other end of the wire is connected to the threaded sleeve.

[0010] In the above technical solution, preferably, a wiring sleeve is fitted on the outer side of the catheter body, the wiring sleeve is located between the expansion drive end and the positioning expansion body, and the inner side of the wiring sleeve is provided with a radial groove, the groove and the outer wall of the catheter body forming a through hole through which the wire passes.

[0011] In the above technical solution, preferably, the wires are symmetrically connected to the left and right sides of the expansion drive end.

[0012] In the above technical solution, preferably, a plug is installed at the outer end of the expansion guide tube, and an inelastic driving bladder is provided at the end of the expansion guide tube near the plug. The expansion bladder under the expansion body has a retraction elastic force to pump the liquid inside into the driving bladder.

[0013] In the above technical solution, preferably, the driving bladder includes two pressing plates, which are connected to the outside of the driving bladder and arranged symmetrically.

[0014] In the above technical solution, preferably, the driving bladder includes a U-shaped clamp, which is clamped to the two pressing plates in a compressed state and clamps the pressing plates.

[0015] In the above technical solution, preferably, the outer surface of the dilatation bladder is fitted with an elastic sheath, the space between the elastic sheath and the dilatation bladder is filled with a medicinal liquid, and the elastic sheath has evenly distributed seepage slits that open after the elastic sheath expands.

[0016] In the above technical solution, preferably, the elastic sheath and the dilating bladder are filled with an elastic absorbent filler, and the absorbent filler is impregnated with the drug solution.

[0017] The esophageal catheter with positioning function proposed in this technical solution has several advantages and effects, and can significantly improve the shortcomings of traditional dilation methods. First, the dilation balloon of this catheter can precisely act on the target location of the esophagus through its own expansion and contraction, achieving precise point-to-point dilation, avoiding ineffective dilation of non-lesion areas, thereby reducing damage to surrounding healthy tissues and improving the safety and effectiveness of treatment.

[0018] Secondly, the positioning expansion element design in the catheter ensures that the catheter remains in place during the procedure, avoiding expansion deviations caused by slippage or displacement of the catheter within the esophagus. This stable positioning function not only reduces irritation and discomfort to the patient but also improves the doctor's operational control, simplifies the procedure, reduces operational difficulty, and thus reduces doctor fatigue and the risk of misoperation.

[0019] Furthermore, the catheter's positioning function allows for repeated dilation procedures within the target area, effectively improving treatment precision and consistency, ensuring maximum effect on the lesion site with each dilation. This design also reduces repeated traction of the catheter within the esophagus, lowering the risk of esophageal mucosal damage and reducing the incidence of postoperative complications.

[0020] Finally, this catheter not only makes targeted dilation possible, but also offers advantages such as ease of operation, high treatment efficiency, and good patient tolerance, thus optimizing the overall dilation treatment effect and improving its safety and success rate. Therefore, this catheter with positioning function has significant clinical application value in targeted esophageal dilation treatment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure between the pressure plate and the drive bladder in this utility model;

[0023] Figure 3 This is a schematic diagram of the installation structure of the elastic sleeve membrane in this utility model;

[0024] Figure 4 This is a schematic diagram of the positioning expansion body in Embodiment 2 of this utility model;

[0025] Figure 5 yes Figure 4 Schematic diagram of the structure of section A;

[0026] Figure 6 yes Figure 4 Schematic diagram of the structure of section B;

[0027] Figure 7 This is an axial schematic diagram of the positioning expansion body in the unfolded state in Embodiment 2 of this utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0029] To address the discomfort and infection risks associated with traditional esophageal catheters, this invention provides a balloon dilation catheter. This catheter, through a positioning inflator, ensures precise dilation at specific points, reducing damage to healthy tissue, improving operational stability and controllability, simplifying the procedure, lowering the risk of complications, and simultaneously enhancing the safety, effectiveness, and patient comfort of treatment. To further illustrate the structure of this invention, a detailed description is provided below in conjunction with the accompanying drawings:

[0030] Example 1

[0031] Please see Figure 1 A balloon dilation catheter includes a catheter body 1, a dilation fluid guide 2, and a dilation balloon 3. The catheter body is the main tube of a gastric tube. In this embodiment, the dilation fluid guide is a slightly thinner tube located inside the catheter body for delivering dilation fluid. At a corresponding position to the dilation balloon, the end of the dilation fluid guide penetrates the wall of the catheter body and connects to the dilation balloon located on the outside. The penetration point is sealed to ensure a seal between the wall of the catheter body and the dilation catheter.

[0032] The dilating sac is located on the periphery of the catheter body and forms a sac filled with liquid to create an expanded state. The dilating fluid guide tube communicates with the dilating sac. The sac is a flexible and elastic sac with an integral sac structure. The overall sac is a rotary sac. When not filled with liquid, it adheres to the outer wall of the catheter body. After being filled with liquid, it forms a spherical expansion state on the catheter body, thereby dilating the corresponding part of the esophagus.

[0033] The catheter includes a positioning expansion body 4 arranged around the catheter body. This positioning expansion body is a component with an expansion function; it expands to increase its volume and achieves partial contact with the catheter cavity, thereby stabilizing the catheter body during the contraction and expansion of the dilation sac. An expansion drive end 10 is provided at the outer end of the catheter body. The positioning expansion body is connected to the expansion drive end 10 via an expansion conduction component along the catheter body's path. The expansion drive end 10 drives the positioning expansion body through the expansion conduction component to form an expansion body protruding outwards from the catheter body. The expansion drive end 10 is a structural part at the end of the catheter body that controls the expansion of the positioning expansion body.

[0034] In this embodiment, the positioning expansion body is a capsule filled with liquid to form an expanded state. The expansion conduction component is an expansion liquid guide tube whose end is connected to the positioning expansion body. The expansion driving end is an expansion injection port located at the end of the expansion conduction component. That is, in this embodiment, the positioning expansion body, the expansion conduction component, and the positioning expansion body have the same structure and working principle as the expansion capsule and the expansion liquid guide tube, and their expansion is achieved by injecting liquid into the positioning expansion body through the expansion driving end.

[0035] In this embodiment, to facilitate the regular and repeated expansion and contraction of the dilator without external fluid supply, achieving independent operation without external connection, a plug 5 is installed at the outer end of the dilator tube. A non-elastic drive bladder 6 is provided at the end of the dilator tube near the plug. In its finished state, the dilator tube can be filled with liquid as needed. The dilator tube under the dilator has a retractive elastic force to pump its internal liquid into the drive bladder. That is, by manually pressing the drive bladder repeatedly, the dilator tube can be repeatedly contracted, thereby achieving repeated dilation of the target portion of the esophagus. Due to the elasticity of the dilator tube itself and the non-elasticity of the drive bladder, repeated squeezing and dilation operations are possible. To ensure that the liquid in the drive bladder is quickly and completely pumped into the dilator tube during the pressing process, please refer to [link to relevant documentation]. Figure 2 The driving bladder includes two pressing plates 7, both circular in shape and covering the entire circular area of ​​the driving bladder. The two pressing plates are connected to the outside of the driving bladder and are symmetrically arranged. The operator can achieve complete compression by pressing either pressing plate. The driving bladder includes a U-shaped clamp, which acts as an independent locking accessory. The two pressing plates in the compressed state can be engaged and clamped by the U-shaped clamp, thereby maintaining the expansion bladder in an expanded state, facilitating applications where the expansion bladder needs to maintain expansion for a certain period of time.

[0036] In this embodiment, further, please refer to Figure 3 The expansion sac is externally fitted with an elastic sheath 8. This elastic sheath is a tubular component with excellent free and excellent elasticity. In its unexpanded state, the elastic sheath is drum-shaped, with a slightly outward-curving convex surface that creates a circumferential gap between its inner side and the expansion sac. A medication is filled between the elastic sheath and the expansion sac, located within this circumferential gap. The elastic sheath has evenly distributed seepage slits that open after expansion. The elastic sheath and the expansion sac are filled with an elastic absorbent filler 9, which is impregnated with the medication. This filler is a sponge-like elastic confining material with the properties of absorbing and storing liquid. The seepage slit is a pre-cut slit on the elastic sheath. Due to the elasticity of the material, the elastic sheath is closed. It will only open to form a slit after the elastic sheath is expanded to a certain extent. In this embodiment, the opening of the slit after the elastic sheath is expanded can be controlled by changing the thickness design index of the elastic sheath. When the slit is open, the liquid filler is also under compression, and the liquid inside will seep out evenly on the outside of the elastic sheath, thus completing the application of medicine to the target part of the esophagus.

[0037] Example 2

[0038] The difference between this embodiment and Embodiment 1 lies in the structure of the positioning expansion body. The positioning expansion structure in Embodiment 1 still requires an external component to supply liquid, while this embodiment aims to provide a positioning expansion structure that has its own expansion function without external supply. Please refer to [link / reference]. Figures 4-7 Specifically, the positioning expansion body includes an upper sleeve, a lower sleeve 4-1, and N elastic ribs 4-2 connecting the upper and lower sleeves. The upper sleeve is fixed to the catheter body. The lower sleeve is fitted onto the catheter body and moves along the catheter. The elastic ribs are evenly spaced around the catheter body. As the lower sleeve moves closer to the upper sleeve, the elastic ribs form an outwardly expanding lantern-shaped expansion structure. After the lower sleeve is pulled closer to the upper sleeve, the elastic ribs bend into an outwardly convex arc shape, thus forming a lantern-shaped protrusion. This structure contacts the esophageal wall, thereby achieving positioning. This lantern-shaped protrusion structure formed by multiple elastic ribs, in contact with the esophageal wall, with each elastic rib conforming to different curved surfaces of the esophageal wall, achieves excellent positioning effect by ensuring the entire positioning expansion body fits the esophageal wall. This gentle contact avoids concentrated stress on the esophageal wall, resulting in excellent protection of the esophagus and improved patient comfort.

[0039] The expansion drive end includes a threaded tube 10-1 and a threaded sleeve 10-2. The threaded tube is fixed to the end of the conduit body and has threads on the outside. The threaded sleeve has threads on the inside and is threaded to fit the outside of the threaded tube. The expansion transmission component is a wire 11 running along the conduit body. One end of the wire is connected to the lower sleeve of the positioning expansion body, and the other end of the wire is connected to the threaded sleeve. Specifically, the threaded tube is a circumferential sleeve fixed to the end of the conduit body, and the threaded sleeve is a sleeve adapted to the threaded tube. The threaded sleeve can change its position in the circumferential direction of the conduit body by rotation. Furthermore, an inward flange is provided at the lower end of the threaded sleeve. An annulus 10-3 is provided inside the flange. The annulus does not transmit torque between itself and the threaded sleeve, but the threaded sleeve can apply tension to the annulus through the flange at the lower end. The upper end of the wire is directly connected to this annulus, and the lower end of the wire is connected to the lower sleeve of the positioning expansion body. By rotating the threaded sleeve, the wire can be driven to pull the lower sleeve closer to the upper sleeve, thereby realizing the expansion of the positioning expansion body.

[0040] In this embodiment, a wiring sleeve 12 is fitted onto the outer side of the catheter body. The wiring sleeve is a section of tubing fitted onto the catheter body and is located between the expansion drive end and the positioning expansion body. The inner side of the wiring sleeve has a radial groove, which forms a perforation with the outer wall of the catheter body for the wires to pass through. Wires are symmetrically connected to the left and right sides of the expansion drive end. The perforation is designed to ensure wire stability, and this outer-fitting assembly design greatly simplifies the product manufacturing process and reduces costs.

[0041] When it is necessary to release the positioning, rotate the threaded sleeve in the opposite direction. Under the elastic action of the elastic rib itself and the frictional force of the esophageal wall during the withdrawal of the catheter, the expansion effect of the positioning expansion body is released. In this embodiment, the wiring sleeve, upper sleeve, lower sleeve and elastic rib are integrally formed. The upper sleeve is the lower edge part of the wiring sleeve.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 balloon dilation catheter, comprising a catheter body, a dilation fluid guide tube, and a dilation balloon, wherein the dilation balloon is disposed around the periphery of the catheter body and forms a balloon filled with fluid to form an expanded state, and the dilation fluid guide tube communicates with the dilation balloon, characterized in that: The device includes a positioning expansion body disposed along the line of the catheter body. The outer end of the catheter body is provided with an expansion driving end. The positioning expansion body is connected to the expansion driving end through an expansion conducting component along the line of the catheter body. The expansion driving end drives the positioning expansion body to form an expansion body that protrudes outward from the periphery of the catheter body through the expansion conducting component.

2. The balloon dilation catheter according to claim 1, characterized in that: The positioning expansion body is a capsule filled with liquid to form an expanded state. The expansion conduction component is an expansion liquid guide tube whose end is connected to the positioning expansion body. The expansion driving end is an expansion injection port located at the end of the expansion conduction component.

3. The balloon dilation catheter according to claim 1, characterized in that: The positioning expansion body includes an upper sleeve, a lower sleeve, and N elastic ribs connecting the upper sleeve and the lower sleeve. The upper sleeve is fixed to the conduit body, the lower sleeve is fitted onto the conduit body and moves along the conduit, and the elastic ribs are evenly spaced around the conduit body. The lower sleeve moves closer to the upper sleeve, causing the elastic ribs to form an outwardly expanding lantern-shaped expansion structure. The expansion driving end includes a threaded tube and a threaded sleeve. The threaded tube is fitted and fixed to the end of the conduit body and has threads on the outside. The threaded sleeve has threads on the inside and is threaded onto the outside of the threaded tube. The expansion conducting component is a wire that runs along the conduit body. One end of the wire is connected to the lower sleeve of the positioning expansion body, and the other end of the wire is connected to the threaded sleeve.

4. The balloon dilation catheter according to claim 3, characterized in that: A wiring sleeve is fitted on the outer side of the catheter body. The wiring sleeve is located between the expansion drive end and the positioning expansion body. A radial groove is provided on the inner side of the wiring sleeve. The groove and the outer wall of the catheter body form a through hole through which the wire passes.

5. The balloon dilation catheter according to claim 4, characterized in that: The wires are symmetrically connected to the left and right sides of the expansion drive end.

6. The balloon dilation catheter according to claim 2 or 5, characterized in that: A plug is installed at the outer end of the expansion guide tube, and an inelastic driving bladder is provided at the end of the expansion guide tube near the plug. The expansion bladder under the expansion body has a retracting elastic force to pump the liquid inside into the driving bladder.

7. The balloon dilation catheter according to claim 6, characterized in that: The driving bladder includes two pressing plates, which are connected to the outside of the driving bladder and arranged symmetrically.

8. The balloon dilation catheter according to claim 7, characterized in that: The expansion bladder is covered by an elastic sheath, and the space between the elastic sheath and the expansion bladder is filled with a medicinal solution. The elastic sheath has evenly distributed seepage slits that open after the elastic sheath expands.

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