A catheter device for facilitating the installation of a prostate stent

Abstract

A catheter device for facilitating the installation of a prostate stent, comprising an airbag, a front guiding and positioning head, a connecting tube, a water nozzle tube, and a wire; an upper tube and a lower tube are horizontally distributed inside the connecting tube, there is a fixing groove outside the front end of the connecting tube, and a limiting plate is in the middle of the outer side end of the fixing groove; the airbag is sleeved between the front outer side of the fixing groove and the front end of the limiting plate, and the inside of the prostate stent is sleeved between the limiting plate and the outer side of the rear part of the fixing groove; the air inlet tube of the airbag is tightly sleeved outside the front end of the upper tube; the water nozzle tube is located outside the upper rear end of the connecting tube, and the water nozzle tube and a medical liquid injection device are connected through a hose; the front guiding and positioning head is located at the foremost end of the fixing groove, and the other end of the wire passes through the lower tube of the connecting tube and penetrates into the wire tube of the lower tube and the front guiding and positioning head from the back straight forward. The present invention does not require anesthesia, is convenient to use, can be operated by medical staff with general skills, has low requirements for the skills of operators, low surgical costs, and reduces the surgical risks of patients. The present invention has good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a catheter device for facilitating the installation of a prostate stent. Background Art

[0002] Benign prostatic hyperplasia is a common disease in elderly men, with an incidence rate as high as 60% in the 70-year-old population. Clinically, it is mainly manifested as difficult urination, frequent urination, increased nocturia. In severe cases, hematuria and urinary retention may occur, and urination cannot be carried out. The current main treatment methods for prostatic hyperplasia are drug treatment and surgical treatment. Drug treatment mainly uses alpha receptor blockers, 5-alpha reductase inhibitors and plant preparations. For most severe prostatic hyperplasia patients, the drug effect is not good. Therefore, it is necessary to remove the hyperplastic prostatic tissue through surgery to relieve the bladder neck obstruction and improve the urination patency. Due to the large amount of bleeding during prostatic hyperplasia surgery, it needs to be completed by experienced clinical surgical medical staff. In addition, most severe prostatic hyperplasia patients are elderly patients over 70 years old, and some are even over 90 years old. These patients often have complications such as hypertension, diabetes, and coronary heart disease. For elderly high-risk patients, whether undergoing transurethral resection of the prostate with plasma, prostate laser ablation surgery, prostate laser enucleation surgery, or prostate balloon dilation, prostate rivet dilation, etc., they are greatly limited in terms of tolerating surgery and anesthesia, and the surgical complications increase significantly. A large number of clinical reports also suggest that prostatic hyperplasia surgery in the elderly belongs to one of the high-risk surgeries.

[0003] Currently, for prostatic hyperplasia, there is also a better treatment method, that is, prostate stent implantation. In the specific operation, by implanting a prostate stent into the prostatic channel of the human body, the stent can push aside the hyperplastic and compressed prostatic tissue, expand the urethral passage, relieve the urethral pressure, and achieve complete urethral patency. It avoids the implementation of surgery and its complications, and is currently the best choice for treating difficult urination caused by prostatic hyperplasia. However, in the existing technology, due to the lack of a suitable stent implantation device, it is necessary to implant the stent between the bladder orifice and the prostatic channel of the human body through experienced surgical medical staff in combination with a urethral endoscope under general anesthesia of the patient. Due to the above operations, anesthesia will bring certain safety risks to the patient, and implanting the stent between the bladder orifice and the prostatic channel of the human body in combination with a urethral endoscope also has high costs and high requirements for the skills of surgical medical staff. In summary, the existing stent implantation method still has great limitations. Summary of the Invention

[0004] In order to overcome the drawbacks in the existing prostate hyperplasia stent installation surgery, where the lack of a suitable device leads to certain safety risks for patients during stent installation, high costs, and relatively high skill requirements for surgical medical staff, the present invention provides a catheter device for conveniently installing a prostate stent that does not require anesthesia and can be operated by medical staff with a certain level of knowledge. By inflating and deflating the pressure saline in the airbag and changing its volume, the stent can be easily pushed into the bladder orifice and the prostate junction, thereby achieving convenience in use, low skill requirements for operators, low surgical costs, and reduced surgical risks for patients.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A catheter device for conveniently installing a prostate stent, characterized by comprising an airbag, a front guiding and positioning head, a connecting tube, a water nozzle tube, and a positioning wire; the upper tube and the lower tube are horizontally distributed inside the connecting tube, there is a fixed groove outside the front end of the connecting tube, and a limiting plate is provided in the middle of the outer side of the fixed groove; the airbag is a double-layer sealed hollow structure; the airbag is sleeved between the front outer side of the fixed groove and the front end of the limiting plate, and the outer diameter of the airbag is smaller than the outer diameter of the rear part of the connecting tube; the prostate stent is internally sleeved between the rear part of the limiting plate and the outer side of the rear part of the fixed groove; the air inlet tube of the airbag is tightly sleeved outside the front end of the upper tube; the water nozzle tube is located outside the upper rear end of the connecting tube, the lower end of the water nozzle tube communicates with the inside of the upper tube, and the upper end of the water nozzle tube has a pipe plug, and the pipe plug is connected to a medical liquid injection device through a hose; the front guiding and positioning head is located at the frontmost end of the fixed groove; the lower tube communicates with the wire tube horizontally distributed inside the middle of the front guiding and positioning head, the rear end of the lower tube is located outside the rear end of the connecting tube, and the other end of the wire passes through the lower tube of the connecting tube from back to front and penetrates into the wire tube of the lower tube and the front guiding and positioning head.

[0007] Furthermore, the front guiding and positioning head, the connecting tube, and the water nozzle tube are made of one or several of high molecular materials such as medical-grade epoxy resin, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyoxymethylene, polyamide, polycarbonate, ABS, polysulfone, PEEK, etc. The front guiding and positioning head and the connecting tube have a certain degree of softness, and the outer surfaces of the connecting tube, the airbag, and the front guiding and positioning head have a hydrophilic medical polymer coating.

[0008] Furthermore, the airbag is made of materials such as medical-grade silicone, polyurethane, and nylon. After the airbag is filled with liquid and expands, its volume is larger than the outer diameter of the stent; when the airbag is not filled with water, its outer diameter and the outer diameter of the limiting plate are smaller than the inner diameter of the surgical stent; the inner diameter of the stent is smaller than the outer diameter of the rear end of the connecting tube, and the transverse length of the stent is smaller than the distance between the rear end of the limiting plate and the rear end of the fixed groove.

[0009] Furthermore, the outer diameter of the front guiding and positioning head is smaller than the inner diameter of the stent, the upper end of the front guiding and positioning head is upturned, and the front part is a circular arc structure, and the outer diameter of the front part is smaller than the outer diameter of the rear part.

[0010] The beneficial effects of the present invention are as follows: The present invention is made of a material with a certain softness and can be conveniently inserted into the human urethra through the positioning of the steel wire. When the airbag of the present invention is in a water-filled state, the outer diameter of the airbag is larger than the inner diameter of the stent. This can ensure that the medical staff during the operation can introduce the front end of the connecting tube and the stent into the urethra. Since the upper end of the front guiding and positioning head at the front end of the present invention is upturned and conforms to the shape of the junction of the human bladder opening and the prostate, after the front end of the connecting tube enters the end point inside the urethra, the upturned part of the upper end of the front guiding and positioning head just abuts against the bladder opening and stops advancing. In this way, the medical staff can draw out the normal saline in the airbag, and its volume becomes smaller. Then, the medical staff withdraws the present invention through the urethra. Since the volume of the stent is larger than the inner diameter of the prostate channel, the stent can be firmly fixed inside the bladder opening and the front end of the prostate channel, thus completing the entire stent implantation process. The present invention is convenient to use, has low requirements for the skills of the operators, low surgical costs, and reduces the surgical risks of the patients. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall and partial structures of the present invention when the airbag is filled with saline.

[0013] Figure 2 It is a schematic diagram of the structure of the present invention when it is not filled with saline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Figure 1 、 2As shown in the figure, a catheter device for facilitating the installation of a prostate stent includes an airbag 1, a front guiding and positioning head 2, a connecting tube 3, a water nozzle tube 4, and a positioning stainless steel wire 5. In the upper inner part and the middle part of the connecting tube 1, there are a upper tube 31 (with a lower front end and a higher rear end) and a lower tube 32 which are horizontally distributed, isolated from each other, and integrally formed and communicated with the connecting tube. The outer middle part of the front end of the connecting tube 3 has a cylindrical airbag fixing groove 33 with an outer diameter smaller than that of the rear end. In the middle part of the outer side end of the ring fixing groove 33, there is an integrally formed annular limiting plate 34 with an outer diameter slightly smaller than that of the airbag. The airbag 1 is a cylindrical double-layer sealed hollow structure, and a through cylindrical fixing tube 101 is horizontally arranged in the middle thereof. The airbag 1 is sleeved between the front outer side of the fixing groove 33 and the front end of the limiting plate 34 through the fixing tube 101. The inner diameter of the fixing tube of the airbag 1 is smaller than the outer diameter of the fixing groove 33, and the length of the airbag 1 is the same as the distance between the front end of the fixing groove 33 and the front end of the limiting plate 34. The outer diameter of the airbag 1 is slightly smaller than the outer diameter of the rear part of the connecting tube 3. The inner part of the hollow prostate stent 6 is sleeved between the rear side of the limiting plate 34 and the front end of the rear part of the fixing groove 33. There is an opening in the upper middle part of the limiting plate 34. The outer side of the front end of the upper tube 32 is integrally formed and located outside the front side end of the limiting plate 34. The air inlet tube 102 at the upper rear part between the inner and outer layers of the upper part of the airbag is tightly sleeved on the outer side of the front end of the upper tube 32. The water nozzle tube 4 is integrally formed on the outer side of the upper rear end of the connecting tube 3. The lower end of the water nozzle tube 4 is integrally formed and connected with the rear end of the upper tube 31 and is internally communicated. The upper end of the water nozzle tube 4 has a pipe plug 41, and the pipe plug 41 is inserted and connected with a medical liquid injection device through a hose. The front guiding and positioning head 2 is integrally formed at the frontmost end of the fixing groove 33. The front end of the lower tube 32 communicates with a steel wire tube 21 horizontally distributed inside the middle part of the front guiding and positioning head 2. The rear end of the lower tube 32 is located outside the middle part of the rear side of the connecting tube 3. One end of the steel wire 5 is sleeved outside the middle part of the rear end of the connecting tube 3, and the other end of the steel wire 4 passes through the lower tube 32 of the connecting tube from the rear to the front and penetrates into the steel wire tube 21 of the lower tube 32 and the front guiding and positioning head.

[0015] Figure 1 , 2As shown, the front guiding positioning head 2, the connecting pipe 3 (the outer diameter can ensure passing through the human urethra), and the water nozzle pipe 4 are made of one or several of high molecular materials such as medical-grade epoxy resin, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyoxymethylene, polyamide, polycarbonate, ABS, polysulfone, and PEEK. The front guiding positioning head 2 and the connecting pipe 3 have a certain softness, and the outer surfaces of the connecting pipe 3, the airbag 1, and the front guiding positioning head 2 are provided with a hydrophilic medical high molecular coating. The airbag 1 is made of materials such as medical silicone, polyurethane, and nylon. After the airbag 1 is filled with water and expands, its volume is slightly larger than the outer diameter of the stent 6. When the airbag 1 is not filled with water, the outer diameter of the airbag 1 and the outer diameter of the limiting plate 34 are smaller than the inner diameter of the surgical stent 6. The inner diameter of the stent 6 is smaller than the outer diameter of the rear end of the connecting pipe 3 and is close to the outer diameter of the rear end of the connecting pipe 3. The transverse length of the stent 6 is slightly smaller than the distance between the rear end of the limiting plate 34 and the rear end of the fixing groove 33. The outer diameter of the front guiding positioning head 2 is smaller than the inner diameter of the stent 6. The upper end of the front guiding positioning head 2 is upturned, and the front part is an arc-shaped structure. The outer diameter of the front part is smaller than the outer diameter of the rear part.

[0016] Figure 1 , 2As shown, before the present invention is used, after routine disinfection, the surgical medical staff will put the hollow prostate stent 6 to be implanted in the patient's prostate between the rear side of the limiting plate 34 and the front end of the rear part of the fixing groove 33, and insert the pipe plug 41 of the water nozzle tube and the medical liquid injection device (such as a syringe) through a hose to connect (the hose of the medical liquid injection device has a valve), and the medical staff will then inject physiological saline into the water nozzle tube 4, and the physiological saline enters the airbag 1 through the upper tube 31. The airbag 1 expands due to the pressure of water and its volume increases (the valve is closed after expansion), and the volume is larger than the outer diameter of the stent 6, so the stent 6 is fixed between the front end of the fixing groove 33 and the rear end of the airbag 1. After the support 6 is fixed, the medical staff disinfects the patient's perineum and spreads the towel according to the standard aseptic principle, and then enters the process of placing the support 6 (the other end of the steel wire 4 is pre-inserted into the lower tube 32 and the steel wire tube 21 of the front guide positioning head from the back to the front through the lower tube 32 of the connecting tube, which plays a role in strengthening the strength of the connecting tube 3 and the front guide positioning head 2, and ensures that the connecting tube 3 and the front guide positioning head 2 can enter the urethra). The medical staff slowly inserts the front guide positioning head 2 into the patient's urethra, and then slowly pushes the connecting tube 3 inward along the urethra. Since the upper end of the front guide positioning head 2 at the front end of the present invention is upturned, and the shape is consistent with the junction of the human bladder opening and the prostate, after the front end of the connecting tube 3 enters the stop point in the urethra, the upturned part of the upper end of the front guide positioning head 2 just hits the bladder opening and no longer moves forward. The medical staff can stop pushing after feeling obvious pushing pressure. Then the medical staff opens the valve and uses the medical liquid push injection device to withdraw the saline in the airbag 1. After the saline is completely withdrawn, the volume of the airbag 1 decreases. Then the medical staff completely withdraws the steel wire 5 from the lower tube 32, and the connecting tube and the guide positioning head 2 regain their softness, and slowly withdraws the connecting tube 3 from the urethra. Since the outer diameter of the airbag 1 when not inflated with water and the outer diameter of the limit plate 34 are smaller than the inner diameter of the surgical stent 6, and the outer diameter of the guide positioning head 2 is smaller than the inner diameter of the stent 7, the front guide positioning head 2 and the connecting tube 3 have a certain degree of softness, so the present invention can be more conveniently withdrawn from the human urethra. Moreover, since the outer diameter of the stent 6 is larger than the inner diameter of the human prostate passage, the outer diameter of the guide positioning head 2 (when pulled outward into the stent, the upturned part will go downward and slip out backward through the stent 6) is smaller than the inner diameter of the stent 7, so that the stent can be stably fixed in the bladder orifice and the front end of the prostate passage from the outer side of the airbag 1 and the guide positioning head 2, thereby completing the entire stent implantation process. The implantation method of the present invention is simple and easy to learn; it is a short-term non-invasive operation, and is easily accepted by patients; the clinical efficacy is immediate and effective; there is no need for hospitalization and general anesthesia, and the operation can be performed at the bedside or outpatient clinic, which minimizes the medical cost. The present invention is easy to use, does not require high skills for operators, has low surgical costs, and reduces surgical risks for patients.

[0017] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0018] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments understandable by those skilled in the art.

Claims

1. A catheter device for facilitating the installation of a prostate stent, characterized in that, It includes an airbag, a front guiding positioning head, a connecting pipe, a water nozzle pipe, and a positioning wire; Inside the connecting pipe, an upper pipe and a lower pipe are horizontally distributed. There is a fixing groove outside the front end of the connecting pipe, and a limiting plate is in the middle of the outer side of the fixing groove. The airbag is a double-layer sealed hollow structure; The airbag is sleeved between the front outer side of the fixing groove and the front end of the limiting plate. The outer diameter of the airbag is smaller than the outer diameter of the rear part of the connecting pipe. The prostate stent is internally sleeved between the rear part of the limiting plate and the outer side of the rear part of the fixing groove; The air inlet pipe of the airbag is tightly sleeved outside the front end of the upper pipe; The water nozzle pipe is located outside the upper rear end of the connecting pipe. The lower end of the water nozzle pipe communicates with the inside of the upper pipe. The upper end of the water nozzle pipe has a pipe plug, and the pipe plug is connected to a medical liquid injection device through a hose; The front guiding positioning head is located at the frontmost end of the fixing groove; The lower pipe communicates with a steel wire pipe horizontally distributed inside the middle of the front guiding positioning head. The rear end of the lower pipe is located outside the rear end of the connecting pipe. The other end of the steel wire passes through the lower pipe of the connecting pipe from the back straight into the steel wire pipe of the lower pipe and the front guiding positioning head; When the airbag is filled with liquid and expands, its volume is larger than the outer diameter of the stent; When the airbag is not filled with water, the outer diameter of the airbag and the outer diameter of the limiting plate are smaller than the inner diameter of the surgical stent; The inner diameter of the stent is smaller than the outer diameter of the rear end of the connecting pipe, and the horizontal length of the stent is smaller than the distance between the rear end of the limiting plate and the rear end of the fixing groove; The outer diameter of the front guiding positioning head is smaller than the inner diameter of the stent. The upper end of the front guiding positioning head is upturned, and the front part is an arc-shaped structure. The outer diameter of the front part is smaller than the outer diameter of the rear part.

2. The catheter device for facilitating the installation of a prostate stent according to claim 1, characterized in that, The front guiding positioning head, the connecting pipe, and the water nozzle pipe are made of one or several of medical-grade epoxy resin, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyoxymethylene, polyamide, polycarbonate, ABS, polysulfone, PEEK high molecular materials. The front guiding positioning head and the connecting pipe have a certain degree of softness, and the outer surfaces of the connecting pipe, the airbag, and the front guiding positioning head have a hydrophilic medical high molecular coating.

3. The catheter device for facilitating the installation of a prostate stent according to claim 1, characterized in that, The airbag is made of medical silicone, polyurethane, or nylon.

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