Catheter for esophageal dilatation

Abstract

The invention discloses a catheter for esophageal dilatation, and belongs to the technical field of medical supplies, the catheter comprises a catheter main body, a dilatation catheter and a dilatation balloon, the dilatation balloon is arranged on the periphery of the catheter main body and forms a balloon which is filled with liquid to form a dilatation state, the dilatation catheter is communicated with the dilatation balloon, and the dilatation catheter is communicated with the dilatation balloon. The catheter is characterized by comprising a positioning expansion body arranged around a catheter main body, and an expansion driving end is arranged at the outer end of the catheter main body; the expansion conduction part is connected with the expansion driving end through the expansion conduction part which is wired along the catheter body and drives the positioning expansion body through the expansion conduction part 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] The invention belongs to the technical field of medical supplies, and in particular relates to a catheter for esophageal dilation. Background Art

[0002] At present, for neurogenic cricopharyngeal achalasia caused by brain damage such as stroke, brain trauma, radiation encephalopathy, in addition to traditional rehabilitation methods such as swallowing function training and feeding training, catheter balloon dilatation as an innovative treatment method has gradually gained clinical recognition. The improved catheter balloon dilatation is a safe, non-invasive, simple and effective treatment method, which mainly restores the tension and elasticity of the cricopharyngeal muscle to normal through mechanical means, thereby improving its function. This method uses a catheter with a balloon to insert into the cricopharyngeal muscle, expands the balloon by injecting water, and then pulls the catheter from bottom to top to gradually expand the cricopharyngeal muscle. The expanded balloon stimulates the esophageal mucosa, enhances the reflex swallowing ability through the medullary reflex arc, promotes brain neural regulation, and helps the recovery of cricopharyngeal muscle function. In addition, auditory and visual stimulation can also activate the cerebral cortex and subcortical structures, further promoting the improvement of cricopharyngeal muscle function.

[0003] The current methods of esophageal dilation have the following deficiencies and disadvantages: First, the operation of pulling the catheter will cause significant discomfort to the patient, and in severe cases may cause symptoms such as nausea, affecting the treatment effect. Secondly, the repeated pulling and twitching of the catheter in the esophagus may cause damage to the esophageal mucosa and increase the risk of infection and inflammation. In addition, mechanical dilation may not be able to accurately control the strength and range of dilation, and there is a risk of over-dilation or under-dilation, affecting the effectiveness and safety of treatment. Due to these shortcomings, the patient's treatment experience and recovery process may be negatively affected, and the popularity of clinical applications is therefore limited.

[0004] The method of fixed-point dilation of the esophagus has many advantages over traditional dilation methods. First, fixed-point dilation avoids repeated pulling and twitching of the catheter in the esophagus by repeatedly contracting and expanding at the target position, significantly reducing the patient's discomfort and adverse reactions such as nausea, and improving the patient's tolerance and comfort. Secondly, fixed-point dilation can ensure that the dilation balloon is always located at the lesion site, and perform precise dilation operations, avoiding the problems of over-dilation or under-dilation that may be caused by improper operation in traditional methods, thereby improving the safety and effectiveness of treatment. In addition, fixed-point dilation reduces mechanical stimulation to other parts of the esophagus and reduces the risk of complications such as mucosal damage and infection. At the same time, this method also makes the dilation operation more controllable, reduces the uncertainty in the doctor's operation, and improves the success rate of the operation and the treatment effect. Therefore, fixed-point dilation of the esophagus is significantly superior to traditional dilation methods in terms of accuracy, safety and patient comfort.

[0005] In the esophageal fixed-point dilatation, accurate positioning of the catheter is essential. Only by ensuring that the catheter can stay stably at the lesion site can effective dilatation be achieved, avoiding accidental injury to healthy tissues and increasing patient discomfort. Therefore, it is necessary to redesign the existing catheter to enable it to have a positioning function to meet the requirements of fixed-point dilatation. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides an esophageal dilation catheter which solves the problems of discomfort and infection risk caused by the use of the current traditional esophageal catheter.

[0007] The present invention is implemented as follows: a catheter for esophageal dilation includes a catheter body, an expansion catheter and an expansion balloon, wherein the expansion balloon is arranged on the periphery of the catheter body and forms a balloon whose interior is filled with liquid to form an expanded state, and the expansion catheter is connected to the expansion balloon, and is characterized in that it includes a positioning expansion body arranged around the catheter body, an expansion drive end is provided at the outer end of the catheter body, the expansion conduction component is connected to the expansion drive end through the expansion conduction component along the catheter body, and the positioning expansion body is driven by the expansion conduction component to form an expansion body protruding toward the periphery of the catheter body.

[0008] In the above technical solution, preferably, the positioning expansion body is a sac filled with liquid to form an expanded state, the expansion conduction component is an expansion catheter whose end is connected to the positioning expansion body, and the expansion drive end is an expansion injection port provided at the end of the expansion conduction component.

[0009] In the above technical scheme, 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 catheter body, the lower sleeve is sleeved on the catheter body and moves along the catheter, the elastic ribs are circumferentially evenly spaced around the catheter body, the lower sleeve moves close to the upper sleeve, so that the elastic ribs form a lantern-shaped expansion structure that expands outward; the expansion drive end includes a threaded tube and a threaded sleeve, the threaded tube is sleeved and fixed to the end of the catheter body and has threads on the outside, the threaded sleeve has threads inside and is mounted on the outside of the threaded tube through threads; the expansion conduction component is a wire running along the catheter 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 sleeved on the outer side of the catheter body, the wiring sleeve is located between the expansion drive end and the positioning expansion body, and a radial groove is provided on the inner side of the wiring sleeve, and the groove and the outer wall of the catheter body form a through hole for the wire to pass through.

[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 catheter, and an inelastic driving sac is provided at the end of the expansion catheter close to the plug, and the expansion sac under the expanded state has a retraction force to pump the liquid inside it into the driving sac.

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

[0014] In the above technical solution, preferably, the driving capsule includes a U-shaped clip, and the U-shaped clip is clamped on the two pressing plates in a squeezed state and clamps the pressing plates.

[0015] In the above technical solution, preferably, an elastic sleeve is sleeved outside the expansion bladder, a medical solution is filled between the elastic sleeve and the expansion bladder, and liquid seepage seams are evenly distributed on the elastic sleeve which are opened after the elastic sleeve expands.

[0016] In the above technical solution, preferably, the elastic sleeve and the expansion bladder are filled with an elastic liquid-absorbing filler, and the liquid-absorbing filler is immersed in the medical solution.

[0017] The esophageal catheter with positioning function proposed in this technical solution has multiple advantages and effects, and can significantly improve the shortcomings of traditional dilation methods. First, the dilation balloon of the catheter can accurately act on the target position of the esophagus through its own expansion and contraction, achieving precise fixed-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 body design in the catheter can ensure that the catheter remains in position during operation, avoiding expansion deviation caused by sliding or deviation of the catheter in the esophagus. This stable positioning function not only reduces irritation and discomfort to the patient, but also improves the doctor's controllability, simplifies the operation process, reduces the difficulty of operation, and thus reduces the doctor's operating fatigue and the risk of misoperation.

[0019] In addition, due to the positioning function of the catheter, the dilation operation can be repeated in the target area, effectively improving the accuracy and consistency of the treatment, ensuring that each dilation can produce the maximum effect on the lesion. This design also reduces the repeated pulling action of the catheter in the esophagus, reduces the risk of esophageal mucosal damage, and reduces the incidence of postoperative complications.

[0020] Finally, the catheter not only makes fixed-point dilation possible, but also has the advantages of easy operation, high treatment efficiency, and good patient tolerance. It optimizes the effect of dilation treatment as a whole and improves the safety and success rate of treatment. Therefore, this catheter with positioning function has significant clinical application value in the treatment of fixed-point dilation of the esophagus. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the connection structure between the pressure plate and the driving capsule in the present invention; Figure 3 It is a schematic diagram of the installation structure of the elastic sleeve film in the present invention; Figure 4 is a schematic structural diagram of a positioning expansion body in a second embodiment of the present invention; Figure 5 yes Figure 4 The structural diagram of the middle A part; Figure 6 yes Figure 4 The structural diagram of the middle B part; Figure 7 It is an axial schematic diagram of the positioning expansion body in the expanded state in the second embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] In order to solve the problems of discomfort and infection risk caused by the use of traditional esophageal catheters, the present invention provides an esophageal dilation catheter, which ensures precise and fixed-point expansion by positioning the expansion body, reduces damage to healthy tissues, improves operational stability and controllability, simplifies the operation process, reduces the risk of complications, and improves the safety, effectiveness and comfort of the patient. In order to further illustrate the structure of the present invention, the detailed description is as follows in conjunction with the accompanying drawings: Embodiment 1 See also Figure 1 A catheter for esophageal dilation includes a catheter body 1, a dilation catheter 2 and a dilation balloon 3. The catheter body is the main tube of the stomach tube. In this embodiment, the dilation catheter is a slightly thinner hose for conveying dilation liquid arranged inside the catheter body. The dilation catheter is at a position corresponding to the dilation balloon, and the end of the dilation catheter penetrates the tube wall of the catheter body to connect to the dilation balloon located outside, and the penetration is sealed to ensure the sealing of the tube wall of the catheter body and the dilation catheter.

[0024] The expansion balloon is arranged on the periphery of the catheter body and is filled with liquid to form an expanded state. The expansion catheter is connected to the expansion balloon. The balloon is a flexible and elastic balloon with an overall balloon structure. The overall balloon is a rotating balloon. When not filled with liquid, it fits the outer wall of the catheter body. After being filled with liquid, it forms a spherical expansion state on the catheter body, and the corresponding position of the esophagus is expanded in this form.

[0025] The present invention comprises a positioning expansion body 4 arranged around the catheter body. The positioning expansion body has an expansion function. The positioning expansion body is a part that realizes partial contact with the inner part of the catheter body by increasing its volume after expansion, so as to stabilize the stability of the catheter body during the contraction and expansion of the expansion sac. An expansion drive terminal 10 is provided at the outer end of the catheter body. The expansion conduction component is connected to the expansion drive terminal through the expansion conduction component along the catheter body line, and the positioning expansion body is driven by the expansion conduction component to form an expansion body protruding toward the periphery of the catheter body. The expansion drive terminal is a structural part at the end of the catheter body that controls the expansion of the positioning expansion body.

[0026] In this embodiment, the positioning expansion body is a sac filled with liquid to form an expanded state, the expansion conduction component is an expansion catheter whose end is connected to the positioning expansion body, and the expansion drive end is an expansion injection port provided 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 sac and the expansion catheter, and the expansion of the positioning expansion body is achieved by injecting liquid into the positioning expansion body from the expansion drive end.

[0027] In this embodiment, in order to facilitate the control of the regular repeated expansion and contraction of the expansion balloon, and to achieve the purpose of independent operation without the need for external connection without the aid of external fluid supply, a plug 5 is installed at the outer end of the expansion catheter, and an inelastic driving balloon 6 is provided at the end of the expansion catheter close to the plug. When the catheter is in the state of a finished product, the expansion catheter can be filled with liquid as needed. The expansion balloon in the expanded state has a retraction force that pumps the liquid inside it into the driving balloon. That is, repeated contraction of the expansion balloon can be achieved by manually pressing the driving balloon repeatedly, thereby achieving repeated expansion of the target part of the esophagus. Because of the resilience of the expansion balloon itself and the inelastic characteristics of the driving balloon, the operation of repeated squeezing and expansion can be achieved. In order to ensure that the liquid in the driving balloon can be quickly and completely pumped into the expansion balloon during the pressing process of the operator, please refer to Figure 2The driving capsule includes two pressing plates 7, which are circular and cover the entire driving capsule. The two pressing plates are connected to the outside of the driving capsule and are symmetrically arranged. The operator can achieve complete extrusion by pressing the two pressing plates. The driving capsule includes a U-shaped clip. The U-shaped clip is an independent locking accessory. The two pressing plates in the extrusion state can be clamped and pressed by the U-shaped clip, so that the expansion capsule maintains the expansion state, which is convenient for the expansion capsule to maintain expansion for a certain period of time.

[0028] In this embodiment, further, please refer to Figure 3 The expansion capsule is covered with an elastic sleeve 8, which is a sleeve-shaped component with excellent elasticity. When not expanded, the elastic sleeve is drum-shaped, and the sleeve surface forms a slightly outward arc bulge, so that an annular gap is formed between the inner side and the expansion capsule. The elastic sleeve and the expansion capsule are filled with liquid medicine, which is arranged in the annular gap. The elastic sleeve is evenly distributed with liquid seepage seams that are opened after the elastic sleeve expands. The elastic sleeve and the expansion capsule are filled with elastic liquid-absorbing filler 9, which is soaked with liquid medicine. This filler is a sponge-like elastic limiting material with the characteristics of absorbing and storing liquid. The seepage slit is a slit pre-processed on the elastic cuff. Due to the elastic characteristics of the elastic cuff's own material, it is closed and will only open to form a slit after the elastic cuff is expanded to a certain extent. In this embodiment, the slit opening after the elastic cuff is expanded can be controlled by changing the thickness design index of the elastic cuff. When the slit is open, the liquid filler is also in a squeezed state, and the liquid medicine inside it will seep out evenly on the outside of the elastic cuff to complete the administration of medicine to the target part of the esophageal dilation.

[0029] Embodiment 2 The difference between this embodiment and the first embodiment is the structure of the positioning expansion body. The positioning expansion structure in the first embodiment still needs to rely on the external part to provide liquid, while this embodiment aims to provide a positioning expansion structure with its own expansion function without external supply. Figure 4-Figure 7Specifically, the positioning expansion body includes an upper sleeve, a lower sleeve 4-1 and N elastic tendons 4-2 connected between the upper sleeve and the lower sleeve, and the upper sleeve is fixed to the catheter body. The lower sleeve is mounted on the catheter body and moves along the catheter, and the elastic tendons are evenly spaced around the catheter body in the circumferential direction. The lower sleeve moves close to the upper sleeve, so that the elastic tendons form a lantern-shaped expansion structure that expands outward. After the lower sleeve is pulled close to the upper sleeve, the elastic tendons are bent into an outward convex arc to form a lantern-shaped convex structure. This structure contacts the inner wall of the esophagus to achieve positioning. This lantern-shaped convex structure formed by multiple elastic tendons is in contact with the inner wall of the esophagus. Each elastic tendon fits and contacts the inner wall of the esophagus with different curved surface shapes, thereby achieving the entire positioning expansion body and the inner wall of the esophagus. The anastomosis has an excellent positioning effect, and this gentle contact will not produce concentrated stress compression on the inner wall of the esophagus. Whether in terms of the protection effect of the esophagus or the internal perception of the patient, the effect is excellent.

[0030] 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 catheter body and has threads on the outside, the threaded sleeve is provided with threads inside and is fitted to the outside of the threaded tube through threads; the expansion conduction component is a wire 11 running along the catheter 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 fixedly sleeved on the end of the catheter body, the threaded sleeve is a sleeve adapted to the threaded tube, and the threaded sleeve can change its position on the circumference of the catheter body by rotation. Further, an inward flange is provided at the lower end of the threaded sleeve, and a ring body 10-3 is provided inside the flange. Torque is not transmitted between the ring body and the threaded sleeve, but the threaded sleeve can apply tension to the ring body through the flange at the lower end. The upper end of the wire is directly connected to the ring body, 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 to move close to the upper sleeve, thereby achieving the expansion of the positioning expansion body.

[0031] In this embodiment, the outer side of the catheter body is covered with a wiring sleeve 12, which is a section of sleeve that is covered with the catheter body. The wiring sleeve is located between the expansion drive end and the positioning expansion body. The inner side of the wiring sleeve is provided with a radial groove, and the groove and the outer wall of the catheter body form a through hole for the wire to pass through. The left and right sides of the expansion drive end are symmetrically connected to the wire. The formation of the perforation is to ensure the stability of the wire, and this jacket-type assembly design greatly simplifies the production process and cost of the product.

[0032] When the positioning needs to be released, the threaded sleeve is rotated in the opposite direction, and the expansion effect of the positioning expansion body is released under the elastic effect of the elastic tendon body and the friction of the inner wall of the esophagus during the process of withdrawing the catheter. In this embodiment, the routing sleeve, the upper sleeve body, the lower sleeve body and the elastic tendon body are integrally formed. The upper sleeve body is the lower edge part of the routing sleeve.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A catheter for esophageal dilation, comprising a catheter body, a dilation catheter and a dilation balloon, wherein the dilation balloon is arranged on the periphery of the catheter body and forms a balloon filled with liquid in an expanded state, the dilation catheter is connected to the dilation balloon, and is characterized in that: It includes a positioning expansion body arranged around the catheter body, the outer end of the catheter body is provided with an expansion drive end, the expansion conduction component is connected to the expansion drive end through the expansion conduction component running along the catheter body, and the positioning expansion body is driven by the expansion conduction component to form an expansion body protruding toward the periphery of the catheter body.

2. The esophageal dilation catheter according to claim 1, characterized in that: The positioning expansion body is a sac filled with liquid to form an expanded state, the expansion conduction component is an expansion catheter whose end is connected to the positioning expansion body, and the expansion drive end is an expansion injection port provided at the end of the expansion conduction component.

3. The esophageal dilation catheter according to claim 1, characterized in that: 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 catheter body, the lower sleeve is sleeved on the catheter body and moves along the catheter, the elastic ribs are circumferentially evenly spaced around the catheter body, the lower sleeve moves close to the upper sleeve, so that the elastic ribs form a lantern-shaped expansion structure that expands outward; the expansion drive end includes a threaded tube and a threaded sleeve, the threaded tube is sleeved and fixed to the end of the catheter body and has threads on the outside, the threaded sleeve has threads inside and is mounted on the outside of the threaded tube through threads; the expansion conduction component is a wire running along the catheter 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 esophageal dilation catheter according to claim 3, characterized in that: A wiring sleeve is sleeved on the outer side of the catheter body, and 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, and the groove and the outer wall of the catheter body form a through hole for the wire to pass through.

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

6. The esophageal dilation catheter according to claim 2 or 5, characterized in that: A plug is installed at the outer end of the expansion catheter, and an inelastic driving sac is provided at the end of the expansion catheter close to the plug. The expansion sac under the expanded state has a retraction force that pumps the liquid inside into the driving sac.

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

8. The esophageal dilation catheter according to claim 7, characterized in that: The driving capsule comprises a U-shaped clip, and the U-shaped clip is clamped on the two pressing plates in a squeezed state and clamps the pressing plates.

9. The esophageal dilation catheter according to claim 8, characterized in that: The expansion sac is covered with an elastic sleeve membrane, the space between the elastic sleeve membrane and the expansion sac is filled with liquid medicine, and the elastic sleeve membrane is evenly distributed with liquid seepage seams that are opened after the elastic sleeve membrane expands.

10. The esophageal dilation catheter according to claim 9, characterized in that: The elastic sleeve and the expansion sac are filled with elastic liquid-absorbing filler, and the liquid-absorbing filler is soaked with the medical solution.

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