Multifunctional ureteral stent tube with spheroidal bladder segment

Abstract

A medical device, particularly a ureteral stent tube with a spheroidal bladder segment (3). The technical problem to be solved is that a conventional double pigtail ureteral stent tube has the defects of being required to be placed under direct vision, having obvious stimulation with regard to a bladder, and being free from an anti-regurgitation structure. The bladder segment (3) of the ureteral stent tube is designed to be of a spheroidal shape, such that the effect of a limiting head can be achieved, the ureteral stent tube can be arranged in place without being monitored with an endoscope, stimulation of the bladder by a thin tubular structure can be avoided, and a sufficient space can be provided in the spheroidal structure to accommodate an anti-regurgitation one-way valve (6). The ureteral stent tube comprises a renal pelvis segment (1), a ureteral segment (2) and a bladder segment (3), wherein the renal pelvis segment (1) is of a curved tubular shape, the ureteral segment (2) is of a straight tubular shape, and the bladder segment (3) is of a spheroidal structure including a sphere, an oblate spheroid, a hemisphere, a heart-shaped form, a concave-core sphere, etc.; the ureteral segment (2) is directly linked with the bladder segment (3); and a drainage hole can be provided in a wall of the spheroidal structure of the bladder segment (3), and the anti-regurgitation one-way valve (6) and other structures can be provided inside the bladder segment (3).

Description

Multifunctional spherical bladder ureteral stent Technical Field

[0001] The invention relates to a medical device, in particular to a ureteral stent tube with a spherical bladder section. Background Art

[0002] A ureteral stent is a medical device used during kidney and ureteral surgery. It is placed in the ureter for drainage, with the upper end reaching the renal pelvis and the lower end typically reaching the bladder. Ureteral stents are typically placed as non-permanent catheters and need to be removed within weeks to months of implantation. The most commonly used ureteral stents are called double pigtails or double-J stents. They are elongated, elastic tubes with an outer diameter of several millimeters and an effective length of approximately 24 to 28 centimeters. They can be stretched into a straight tube under external force. Without external force, the material at the upper and lower ends spontaneously curls into a spiral or "J" shape. The curled sections at both ends secure the upper and lower ends of the ureteral stent within the spacious renal pelvis and bladder, maintaining their position and preventing them from slipping out of the ureter. Technical issues

[0003] Ureteral stents in the prior art have several disadvantages: 1. During placement, conventional ureteral stents are first placed with a guidewire. The tube is then positioned in a straightened position along the guidewire. To ensure that both ends of the stent are positioned within the renal pelvis and bladder, they must be placed neither too deep nor too shallow. Therefore, the insertion depth must be adjusted under endoscopic monitoring, such as a cystoscope or ureteroscope. This increases the number of steps required and increases the risk of placement errors, such as over- or under-placement. 2. The bladder section of current stents consists of a curved or straight tubular structure. This tubular structure exerts relatively high pressure on the bladder mucosa, causing compression or friction on the bladder wall, which can cause severe bladder irritation and lead to symptoms such as frequent and urgent urination. 3. Ureteral stents connect the renal pelvis, ureter, and bladder. During urination, urine from the bladder may flow back into the kidney, increasing renal infection and causing discomfort such as soreness and swelling in the renal area. Due to the limited size of the tube, current ureteral stents with internal anti-reflux valves are difficult to manufacture and use. Currently, there is no ureteral stent that can solve the above problems at the same time. Technical Solutions

[0004] The present invention provides a new type of ureteral stent that addresses the shortcomings of the above-mentioned background technology. The bladder segment is designed to be spherical, which serves as a limit head and can place the ureteral stent in place without endoscopic monitoring. Another function is that the bladder segment replaces the traditional tubular structure with a smooth spherical shape, which can avoid the irritation of the tubular structure to the bladder. The interior of the spherical structure can provide sufficient space to accommodate an anti-reflux valve and other microstructures. This ureteral stent with a spherical bladder segment is a new medical device invention that can provide surgical convenience and improve medical quality.

[0005] The present invention provides a ureteral stent with a spherical bladder segment. The stent comprises a renal pelvis segment, a ureteral segment, and a bladder segment. The renal pelvis segment is a coiled tubular structure, the ureteral segment is a straight tubular structure, and the bladder segment is a spherical structure. The ureteral segment and bladder segment are directly connected, with no other tubular structures between the two segments. The spherical structure of the bladder segment can have shapes such as a sphere, an oblate spheroid, a hemisphere, a heart, or a concave sphere. The ureteral segment can open on the upper wall, lower wall, side wall, or interior of the spherical structure of the bladder segment, where the upper wall refers to the side proximal to the renal pelvis segment and the lower wall refers to the side distal to the renal pelvis segment. The opening of the ureteral segment on the bladder segment can be a non-expanded direct opening or an expanded funnel-shaped opening. The spherical structure of the bladder segment can have drainage side holes on its wall, an anti-reflux one-way valve inside, and a built-in micro-electrical mechanical or electronic device such as a micro-liquid pump or pressure sensor. The transverse diameter of the spherical structure of the bladder segment is larger than the diameter of the ureter and smaller than the diameter of the urethra. The spherical structure of the bladder segment can have a traction line or ribbon to pull the ureteral stent. Beneficial effects

[0006] The present invention breaks through the inherent design pattern of ureteral stents, which contain tubular structures along their entire length, including the renal pelvis and bladder sections. The bladder section of the ureteral stent is changed to a spherical shape. The diameter of this spherical structure is equivalent to that of a conventional adult ureter, allowing it to enter the bladder through the urethra but not the ureter. Therefore, the spherical structure acts as a stopper, which can be retained in the bladder but cannot enter the ureter. When placing the ureteral stent, it can be placed directly along the guidewire without monitoring. Encountering resistance at the uretero-bladder junction indicates that the spherical stopper has reached the ureteral opening. The elastic self-curling characteristics of the renal pelvis section of the ureteral stent maintain the spherical stopper at the ureteral opening, eliminating the need for endoscopic monitoring. At the same time, the bladder-internal portion of the present invention eliminates the tubular structure exposed in the bladder and is replaced with a spherical, expanded structure to prevent the tubular structure from irritating the bladder wall. The spherical, expanded structure of the present invention accommodates an anti-reflux valve, reducing kidney pain and distension caused by urine reflux during urination. Furthermore, the spherical interior can accommodate microelectronic devices to perform various functions. No other urinary catheter has a similar design, making this invention a practically applicable innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of the overall appearance of embodiment 1 of the present invention; Figure 2 is a schematic diagram of a partial cross-section of embodiment 1 of the present invention; Figure 3 is a schematic diagram of a partial cross-section of embodiment 2 of the present invention; Figure 4 is a schematic diagram of a partial cross-section of embodiment 3 of the present invention; Figure 5 is a schematic diagram of a partial cross-section of embodiment 4 of the present invention; Figure 6 is a schematic diagram of a partial cross-section of embodiment 5 of the present invention; Explanation of the numbers in the figures: 1. Renal pelvis segment, 2. Ureter segment, 3. Bladder segment, 4. Opening, 5. Side hole, 6. Anti-reflux one-way valve, 7. Pull line. Best Mode for Carrying Out the Invention

[0008] Example 1: As shown in Figures 1 and 2, a ureteral stent tube with a hollow spherical bladder segment includes a renal pelvis segment 1, a ureteral segment 2, and a bladder segment 3, wherein the renal pelvis segment 1 is a coiled tubular structure, the ureteral segment 2 is a straight tubular structure, and the bladder segment 3 is a hollow sphere. The opening 4 of the ureteral segment 2 is located on the upper wall of the spherical bladder segment 3, and there is a drainage side hole 5 on the spherical wall of the bladder segment 3. There is an anti-reflux one-way valve 6 inside the sphere of the bladder segment 3. Modes for Carrying Out the Invention

[0009] Example 2: As shown in Figure 3, a ureteral stent tube with a hollow spherical bladder segment includes a renal pelvis segment 1, a ureteral segment 2, and a bladder segment 3, wherein the renal pelvis segment 1 is a coiled tubular structure, the ureteral segment 2 is a straight tubular structure, and the bladder segment 3 is a hollow sphere. The opening 4 of the ureteral segment 2 is located on the lower wall of the spherical bladder segment 3.

[0010] Example 3: As shown in FIG4 , a ureteral stent with an ellipsoidal bladder segment comprises a renal pelvis segment 1, a ureteral segment 2, and a bladder segment 3. The renal pelvis segment 1 is a coiled tubular structure, the ureteral segment 2 is a straight tubular structure, and the bladder segment 3 is a solid ellipsoidal spherical structure. The funnel-shaped opening 4 of the ureteral segment 2 is located on the sidewall of the spherical bladder segment 3.

[0011] Example 4: As shown in Figure 5, a ureteral stent tube with a bladder segment being a biconcave spherical shape includes a renal pelvis segment 1, a ureteral segment 2, and a bladder segment 3, wherein the renal pelvis segment 1 is a coiled tubular structure, the ureteral segment 2 is a straight tubular structure, and the bladder segment 3 is a hollow biconcave spherical structure, and the opening 4 of the ureteral segment 2 is located inside the bladder segment 3.

[0012] Example 5: As shown in Figure 6, a ureteral stent tube with a heart-shaped bladder segment includes a renal pelvis segment 1, a ureteral segment 2, and a bladder segment 3, wherein the renal pelvis segment 1 is a coiled tubular structure, the ureteral segment 2 is a straight tubular structure, and the bladder segment 3 is heart-shaped. The funnel-shaped opening 4 of the ureteral segment 2 is located in the center of the lower wall of the bladder segment 3, and the tip of the bladder segment 3 has a traction line 7. Industrial Applicability

[0013] This invention can be manufactured and used using existing production technology, and can have a positive effect on improving medical capabilities and improving patients' quality of life. Sequence Listing Free Content

[0014] Type your sequence listing free description paragraph here.

Claims

1. A ureteral stent tube with a spherical bladder segment, characterized in that: It includes the renal pelvis segment, ureter segment and bladder segment, among which the renal pelvis segment is a coiled tubular segment, the ureter segment is a straight tubular segment, and the bladder segment is a spherical structure.

2. The ureteral stent according to claim 1, characterized in that: The spherical structure of the bladder segment can be in the shape of a sphere, an oblate sphere, a hemisphere, a heart shape, a concave core sphere, etc.

3. The ureteral stent according to claim 1, characterized in that: The ureter segment may open into the upper wall, lower wall, side wall, or interior of the spherical structure of the bladder segment, wherein the upper wall refers to the side close to the renal pelvis segment, and the lower wall refers to the side away from the renal pelvis segment.

4. The ureteral stent according to claim 1, characterized in that: The opening of the ureteral segment on the bladder segment can be a non-dilated straight opening or a dilated funnel-shaped opening.

5. The ureteral stent according to claim 1, characterized in that: The ureteral segment is directly connected to the bladder segment, and there is no other pipe structure between the two segments.

6. The ureteral stent according to claim 1, characterized in that: The wall of the spherical structure of the bladder segment may be provided with drainage side holes.

7. The ureteral stent according to claim 1, characterized in that: The spherical structure of the bladder segment may have an anti-reflux one-way valve inside.

8. The ureteral stent according to claim 1, characterized in that: The spherical structure of the bladder segment may be internally provided with a micro-electrical mechanical device or an electronic device, including but not limited to a micro-liquid pump and a pressure sensor.

9. The ureteral stent according to claim 1, characterized in that: The transverse diameter of the spherical structure of the bladder segment is larger than the diameter of the ureter and smaller than the diameter of the urethra.

10. The ureteral stent according to claim 1, characterized in that: The spherical structure of the bladder segment may be provided with a traction line or a ribbon for dragging the ureteral stent tube.

Images