CN202637201U - Urethral insertion system for biodegradable urethral stent - Google Patents

Abstract

A urethral insertion system for a biodegradable urethral stent, consisting of a cystoscope sheath with an obturator as a cannula, a rigid cystoscope core as a central slide, and crescent-shaped rigid sheets, push rods, membranes It is composed of mirror bridge and biodegradable urethral stent. The characteristics of this insertion system are: ①The biodegradable urethral stent can be accurately placed in the stricture of the urethra; , ③ simple structure, low cost.

Description

Urethral implantation system for biodegradable urethral stent

1. Technical field

The utility model relates to a urethral insertion system for a biodegradable urethral support, which belongs to the field of medical instruments. the

2. Background technology

Urethral stricture is a common urinary system disease. The stricture may be secondary to infection, forming urethral diverticulum, periurethral inflammation, prostate or epididymis orchitis. If the urinary flow obstruction cannot be relieved for a long time, it will eventually lead to hydronephrosis and renal function damage. uremia. The clinical treatment of urethral stricture can be divided into non-surgical treatment and surgical treatment, among which urethral stenting has become an effective means for the treatment of various urethral stricture obstruction, especially suitable for urinary retention and urethral obstruction caused by benign prostatic hyperplasia. At present, urethral stents can be divided into stainless steel urethral stents, synthetic fiber silicone urethral stents, nickel-titanium alloy urethral stents and biodegradable urethral stents according to different raw materials. Usually different urethral stents must be equipped with different urethral insertion systems. The biodegradable urethral stent is made of polylactic acid as the basic material and can be degraded during use, so there is no need for secondary surgery to remove it, which greatly reduces the pain of patients and represents the development direction of urethral stents. However, there is currently no urethral implantation system specifically for this type of biodegradable urethral stent, because the biodegradable urethral stent has special mechanical properties and is inconvenient to be placed in the urethra. In clinical practice, cystoscope and biopsy forceps are often used directly, which is complicated to use and has a low success rate, which brings a lot of trouble and pain to doctors and patients. the

3. Contents of the invention

The purpose of the utility model is to provide a urethral implantation system for a biodegradable urethral stent, which can safely and conveniently place the degradable urethral stent in an accurate urethral stricture. the

In order to achieve the above purpose, the technical solution adopted by the utility model is: design and manufacture crescent-shaped hard sheet and push rod, with scales on the push rod, crescent-shaped hard thin baffle plate fixed on the front end of the push rod, and push rod direction Vertical, the push rod and the crescent-shaped hard sheet are used to push or drag the biodegradable urethral stent; take the cystoscope as the center slide bar, and put the biodegradable urethra stent on the center slide bar; design and manufacture a membranous mirror bridge , the center sliding rod and the push rod are installed together through the membrane mirror bridge, so that the crescent-shaped hard thin baffle and the center sliding rod can fit together; the push rod can slide axially along the center sliding rod, It is convenient to release the biodegradable urethral stent at the urethral stricture, and it is convenient to adjust the positioning; the cystoscope sheath is used as the cannula, and the above-mentioned push rod, center sliding rod, biodegradable urethral stent and membranous mirror bridge are inserted at the same time before the operation in the cystoscope sheath. the

Specifically, the utility model is a urethral implantation system for a biodegradable urethral stent, which consists of a sleeve, a central sliding rod, a crescent-shaped hard sheet, a push rod, a membranous mirror bridge and a biodegradable urethral stent Composition, wherein the sleeve is a cystoscope sheath with an obturator, which can avoid damage to the urethral tissue, and the central sliding rod is a hard cystoscope core, which can be used to accurately find the urethral stricture and place the The biodegradable urethral stent is fixed on the central sliding rod. The crescent-shaped hard sheet is a hard metal sheet with high strength and no deformation. On the one hand, it is used for close contact with the side of the central sliding rod. Entering into the biodegradable urethra spiral structure, it is used to move the biodegradable urethra axially along the direction of the central sliding rod. The push rod is a high-strength metal wire, and adopts a structure similar to a biopsy forceps, which is easy to operate. There are scales for accurate positioning. The membranous mirror bridge is made of TPU material with high toughness and good elasticity. The outer diameter is equal to the inner diameter of the cystoscope sheath used. There are two holes on the membranous mirror bridge through which Penetrating through, respectively used to fix the push rod and the central sliding rod, the biodegradable urethral stent is a polylactic acid urethral stent with a helical structure. the

Furthermore, a urethral implantation system for a biodegradable urethral stent is characterized in that the membranous mirror bridge cooperates with the central sliding rod and push rod, and is fixed on the inner wall of the sleeve , the central sliding rod and the push rod can slide mutually, and the crescent-shaped hard sheet hooks the biodegradable urethral stent and can slide with the push rod. the

The utility model has the following characteristics:

① It is specially used to accurately place the biodegradable urethral stent into the stricture of the urethra. the

②It only needs to be inserted once during the operation, which is easy to operate and reduces the pain of patients. the

③Simple structure and low cost. the

4. Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the top view of membranous mirror bridge;

Figure 3 is a top view of the center slider and the crescent-shaped hard sheet. the

5. Specific implementation

Further description will be given below in conjunction with the accompanying drawings and embodiments. the

Referring to Figure 1, a urethral implantation system for a biodegradable urethral stent adopts the structure of a single-layer sleeve, and the assembly includes a sleeve 5, a central sliding rod 3, a crescent-shaped hard sheet 1, a push rod 2, The membranous mirror bridge 4 and the biodegradable urethral stent 6, wherein the sleeve 5 is a cystoscope sheath with an obturator, and the central sliding rod 3 is a hard cystoscope core, which can be used to accurately find the urethral stricture and The biodegradable urethral stent is fixed on the central sliding rod 5, the crescent-shaped hard sheet 1 is in close contact with the side of the central sliding rod 3, and can be rotated to enter the interior of the biodegradable urethral helical structure, and is used to place the biodegradable urethra along the The center slide bar moves axially. The push rod 2 is a high-strength metal wire, which adopts a structure similar to biopsy forceps, which is easy to operate. The push rod 2 also has a scale for accurate positioning. The membrane-shaped mirror bridge 4 is made of TPU material. High toughness, good elasticity, the outer diameter is equal to the inner diameter of the casing 5, and the membranous mirror bridge 4 has two holes, penetrating through, respectively used to fix the push rod 2 and the center sliding rod 3, biodegradable urethral stent 6 It is a polylactic acid urethral scaffold with a helical structure. Before the urethral stent implantation, the urethral implantation system of the biodegradable urethral stent is routinely disinfected, the patient is given local or epidural anesthesia, and the stricture is checked with a cystoscope. According to the measurement results, a biodegradable urethra with appropriate specifications is selected bracket6. Exit the center slide bar 3, put the biodegradable urethral stent 6 on the center slide bar 3, and then fix it together with the push rod 2 on the membranous mirror bridge 4, wherein the crescent-shaped hard sheet 1 is closely attached to the center slide bar 3 , insert the kit together into the inner hole of sleeve 5, and place the biodegradable urethral stent under direct vision and adjust the position. the

Claims (2)

1. A urethral implantation system for a biodegradable urethral stent, characterized in that it consists of a sleeve, a central slide bar, a crescent-shaped hard sheet, a push rod, a membranous mirror bridge and a biodegradable urethral stent, the The cannula is a cystoscope sheath with an obturator, the central sliding rod is a hard cystoscope core, the crescent-shaped hard sheet is a hard metal sheet, and the push rod is a high-strength The metal wire, the membranous mirror bridge is made of TPU material, which is tough and highly elastic, and the biodegradable urethral stent is a helical polylactic acid urethral stent. 2. The urethral implantation system for biodegradable urethral stents as claimed in claim 1, wherein said membranous mirror bridge cooperates with said central sliding rod and push rod, and is fixed on said sleeve. The inner wall of the tube, the central sliding rod and the push rod can slide against each other, and the crescent-shaped hard sheet hooks the biodegradable urethral stent and can slide with the push rod. the

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