A guidewire for imaging localization and length determination in urological surgery

Abstract

This utility model relates to a guidewire for visualization and length determination in urological surgery, comprising: an inner core, wherein multiple imaging rings are arranged at certain intervals along the outer periphery of the inner core, the imaging rings being visible under X-ray fluoroscopy; and an outer sheath covering the inner core, the outer periphery of which is provided with graduation lines corresponding one-to-one with the imaging rings and axially aligned, the graduation lines being used to determine the position of the guidewire within the body cavity. After the guidewire is inserted into the body cavity, the surgeon can determine the insertion length of the guidewire based on the graduation lines, avoiding tissue damage due to excessive guidewire length. In X-ray fluoroscopy during ureteral stricture surgery, the imaging rings become visible, and by calculating the number of imaging rings in the stricture segment, the length of the stricture segment can be determined, helping the surgeon to rationally select the dilation technique and improve treatment outcomes. Moreover, this guidewire has a simple structure, is easy to operate, and is highly practical, effectively solving the problems of existing guidewires in urological surgery.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a guidewire used for imaging positioning and length determination in urological surgery. Background Technology

[0002] Guidewires, as crucial medical instruments, are often used in conjunction with endoscopes, double-J stents, minimally invasive dilation and drainage kits, and balloon dilation catheters to provide support and guidance during surgery. However, existing guidewires present several problems in clinical application: First, length control is difficult. Most guidewires lack markings, making it difficult for operators to accurately determine the length of the guidewire inserted into the body. This uncertainty not only easily leads to guidewire puncture or perforation of cavities, but also, if the guidewire is too long when inserted through the urethra, it can coil and twist within the kidney, causing contusion or irritation to kidney tissue and posing unnecessary medical risks. Second, there are deficiencies in stenosis assessment. In ureteral stenosis surgery, X-ray fluoroscopy is required to assess the length of the stenosis. However, even if some guidewires have markings, these markings are not clearly visible under X-ray, making it impossible to accurately determine the length of the urinary tract stenosis. This severely hinders the appropriate selection of dilation devices, making it difficult to achieve the expected dilation effect and ultimately affecting the treatment outcome. Therefore, developing a guidewire that can achieve accurate imaging positioning and length determination in urological surgery is an urgent problem that needs to be solved. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide a guidewire for imaging positioning and length determination in urological surgery. This graduated imaging guidewire determines the length of the guidewire inserted into the human body through the graduation lines and imaging rings. The length of the stenotic segment can be determined by judging the number of imaging rings located in the stenotic segment, thereby assisting in the rational selection of dilation techniques and improving the efficiency and rationality of dilation. Moreover, this imaging guidewire has a simple structure and is easy to manufacture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A guidewire for imaging positioning and length determination in urological surgery includes: an inner core, wherein a plurality of imaging rings are arranged at certain intervals along the length direction on the outer peripheral surface of the inner core, the imaging rings being visible under X-ray fluoroscopy; and an outer sheath covering the inner core, wherein the outer peripheral surface of the outer sheath is provided with scale lines corresponding one-to-one with the imaging rings and axially aligned, the scale lines being used to determine the position of the guidewire within the human body cavity.

[0006] Furthermore, the inner core and the developing ring are either integrally formed or formed separately.

[0007] Furthermore, the outer peripheral surface of the inner core is provided with a plurality of annular grooves along its axial direction, and the developing ring is embedded in the annular grooves, the depth of the annular grooves being matched with the thickness of the developing ring.

[0008] Furthermore, the distance between two adjacent developing rings is 5mm-20mm, and the number of developing rings is 10-40.

[0009] Furthermore, multiple developing rings define a developing segment, and multiple scale lines define a measuring segment. The developing segment and the measuring segment correspond to each other in axial length, and the length of the developing segment is equal to the length of the measuring segment.

[0010] Furthermore, the lengths of both the developing section and the measuring section are 100mm-400mm.

[0011] Furthermore, the outer sleeve and the scale lines are either integrally formed or formed separately.

[0012] Furthermore, the outer tube includes a tube body and a flexible head disposed at the front end of the tube body. The diameter of the flexible head gradually decreases along the axial direction to form a tapered structure, and one end of the inner core cooperates with the flexible head.

[0013] This utility model has the following advantages:

[0014] This invention relates to a guidewire for imaging and length determination in urological surgery, comprising an inner core and an outer sheath. The imaging rings on the inner core and the graduation lines on the outer sheath correspond one-to-one. During use, the guidewire is inserted into the body cavity, and the surgeon can directly determine the length of the guidewire inserted by observing the graduation lines, effectively avoiding unnecessary damage to tissues caused by excessively long or deep insertion. During ureteral stricture surgery using X-ray fluoroscopy, the imaging rings become visible. Because the imaging rings correspond one-to-one with the graduation lines, the surgeon can accurately determine the length of the stricture by counting the number of imaging rings located in the narrowed segment of the body cavity, thereby assisting in selecting a more appropriate dilation technique and improving the efficiency and rationality of the dilation treatment. This guidewire has a simple structure and strong practicality. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a guidewire used for imaging positioning and length determination in urological surgery according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the outer sleeve of this utility model.

[0017] Figure 3 This is a schematic diagram of the inner core of this utility model.

[0018] Figure 4This is a schematic diagram of the structure of the guidewire for imaging positioning and length determination in urological surgery, which is inserted into the human body cavity.

[0019] Wherein, A is guidewire, 1 is outer tube, 101 is scale line, 101a is first marking line, 101b is second marking line, 102 is measuring section, 103 is tube body, 104 is soft head, 2 is inner core, 201 is imaging ring, 202 is imaging section, 203 is annular groove, 3 is human body cavity, and 301 is narrow section. Detailed Implementation

[0020] The following description is merely illustrative in nature and is in no way intended to limit the present invention, its application, or use. It will be further understood that the terms “comprising” and / or “including” as used herein specify the presence of the mentioned features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. It will be understood that when an element, component, and / or part is referred to as “connected to another element, component, and / or part,” it may be directly connected to another element, component, and / or part, or there may be intermediate elements. It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, components, and / or parts, these elements, components, and / or parts should not be limited by these terms. These terms are used only to distinguish one element, component, or part from another element, component, or part. Therefore, the first element, component, or part discussed below may be referred to as the second element, component, or part without departing from the teachings of this invention. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the relevant field and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0021] It should be understood that, for clarity, the accompanying drawings are not drawn to scale, and the same or similar reference numerals indicate the same or similar parts or components. Furthermore, it should be understood that any embodiments described in this application and the technical features they include can be combined with each other.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 The figure shows the overall structure of guidewire A, used for imaging localization and length determination in urological surgery. In actual urological surgery, guidewire A is usually used in conjunction with other medical devices such as endoscopes, double-J stents, minimally invasive dilation and drainage kits, and balloon dilation catheters. Its core function is to provide stable support and accurate guidance for the precise operation of other instruments within the human body cavity 3. Guidewire A has a slender strip structure with a certain degree of flexibility. Guidewire A mainly consists of an inner core 2 and an outer sheath 1 covering the inner core 2. The inner core 2 is the supporting foundation of the entire guidewire A, providing the necessary rigidity to ensure that it will not easily deform in the complex environment within the human body cavity 3. The outer sheath 1 allows guidewire A to smoothly enter the human body cavity 3, reducing the risk of damage to the inner wall of the human body cavity 3.

[0024] Reference Figure 3 Multiple imaging rings 201 are arranged at certain intervals along the length of the outer peripheral surface of the inner core 2. The imaging rings 201 can be visualized under X-ray fluoroscopy. The multiple imaging rings 201 are evenly distributed on the outer peripheral surface of the inner core 2, forming a regular image under X-ray fluoroscopy, which is convenient for doctors to quickly identify and count.

[0025] Reference Figure 1 , 2 In section 4, the outer sheath 1 of guidewire A tightly covers the inner core 2. Multiple graduation lines 101 are set on the outer circumferential surface of the outer sheath 1, corresponding one-to-one with the radiopaque rings 201 on the outer circumferential surface of the inner core 2, and aligned axially. The graduation lines 101 are mainly used to determine the position of guidewire A within the human body cavity 3, and their number is configured according to the actual number of radiopaque rings 201. When guidewire A is inserted into the human body cavity, medical personnel can quickly and intuitively determine the length of guidewire A entering the human body cavity 3 by reading the graduation lines 101 on the outer sheath 1, reducing the risk of unnecessary damage to human tissue due to improper insertion length of guidewire A.

[0026] During surgical fluoroscopy using X-rays, the contrast-enhancing rings 201 on the inner core 2 will be clearly visible. Because the contrast-enhancing rings 201 correspond to the graduation lines 101, medical personnel only need to count the number of contrast-enhancing rings 201 located in the narrow segment 301 of the human cavity 3 to accurately determine the length of the narrow segment 301. Figure 4 For example, the number of radiopaque rings 201 within the narrow segment 301 shown in the figure is 12. Since the spacing between adjacent radiopaque rings 201 is a pre-set fixed value, the length D of the narrow segment 301 can be calculated by multiplying the number of radiopaque rings 201 by the fixed spacing. This setup provides medical personnel with a more accurate and efficient measurement method during surgery, effectively improving the safety and precision of surgical procedures.

[0027] The outer tube 1 is wrapped around the inner core 2 through a heat-shrink process, which makes the connection between the outer tube 1 and the inner core 2 more stable, effectively preventing relative displacement between the two, ensuring the mechanical performance stability of the guide wire A during use, and enhancing the overall sealing performance of the guide wire A.

[0028] The inner core 2 and the developing ring 201 are integrally formed or separately formed. For example, the developing ring 201 is fixed to the outer peripheral surface of the inner core 2 by snap-fitting, welding, forging or bonding.

[0029] Reference Figure 4 The outer circumferential surface of the inner core 2 is provided with multiple annular grooves 203 along its axial direction. The developing ring 201 is embedded in the annular grooves 203. The depth of the annular grooves 203 matches the thickness of the developing ring 201, which can restrict the movement of the developing ring 201 in the axial direction of the inner core 2. This arrangement can effectively improve the installation stability of the developing ring 201.

[0030] In an embodiment not shown, the bottom surface of the annular groove 203 is provided with a plurality of protrusions in the circumferential direction, and the inner surface of the developing ring 201 is provided with a groove in the circumferential direction that cooperates with the protrusions. This effectively prevents the developing ring 201 from being displaced in the circumferential direction of the inner core 2.

[0031] In the inner core 2 of guidewire A, each developing ring 201 is distributed at equal intervals along the axial direction. The distance between two adjacent developing rings 201 is 5mm-20mm, and the number of developing rings 201 is 10-40. Figure 4 As shown, the spacing between two adjacent developing rings 201 is set to 10mm. By counting the number of developing rings 201 located within the narrow segment 301, the length of the narrow segment 301 can be quickly calculated. Figure 4 In the narrow segment 301, there are 12 imaging rings 201. According to the formula that the length of the narrow segment = the distance between adjacent imaging rings × the number of imaging rings in the narrow segment, the length D of the narrow segment can be calculated to be 120mm. The relevant size information of the narrow segment 301 in the human body cavity 3 can be obtained quickly and accurately through X-ray fluoroscopy.

[0032] The imaging ring 201 is made of medical imaging metal or imaging composite material. For example, the imaging ring 201 can be made of metal materials that are not transparent to X-rays, such as gold, platinum, tantalum and similar metal materials.

[0033] Reference Figure 1 and Figure 3Multiple developing rings 201 define developing segments 202, and multiple scale lines 101 define measuring segments 102. The developing segments 202 and measuring segments 102 correspond in axial length, and their lengths are equal. Both developing segments 202 and measuring segments 102 have lengths ranging from 100mm to 400mm. The specific lengths of the developing segments 202 and measuring segments 102 are configured according to the length of guidewire A. For example, for shorter guidewires, to ensure functional effectiveness and focus, the lengths of the developing segments 202 and measuring segments 102 will be shortened accordingly. Conversely, for longer guidewires, the lengths of these two functional segments will be increased to meet the requirements of long-distance measurement and developing.

[0034] The outer tube 1 and the scale lines 101 are either integrally formed or formed separately. The scale lines 101 can be formed by laser engraving or printing. Specifically, laser engraving uses a high-energy-density laser beam to etch scale lines onto the surface of the outer tube 1, while printing uses special ink to print scale lines 101 onto the surface of the outer tube 1 using printing equipment. As the part that directly contacts human tissue, the outer tube 1 must have a smooth and flat outer surface. This is because during the process of guide wire A entering the human cavity 3, a rough or protruding surface can easily scratch or damage human tissue, causing unnecessary medical risks. Based on this requirement, the imaging ring 201 is set on the outer peripheral surface of the inner core 2 to avoid affecting the surface quality of the outer tube 1 due to the placement of the imaging component. The scale lines 101 shown in the figure are protruding from the surface of the outer tube 1. This is to more clearly show the position of the scale lines 101 on the outer tube 1 for easier understanding. However, in practical applications, the scale line 101 is set to be flush with the outer circumference of the outer sleeve 1, without any protrusion.

[0035] Continue to refer to Figure 2 and Figure 4 The outer sheath 1 includes a tube body 103 and a flexible head 104 disposed at the front end of the tube body 103. The flexible head 104 gradually decreases in diameter along the axial direction, forming a tapered structure. This not only effectively reduces the resistance of the guidewire A tip when entering the human body cavity 3, reducing the risk of damage to the inner wall of the cavity, but also enhances the passage performance of the guidewire A in narrow or tortuous cavities.

[0036] One end of the inner core 2 mates with the soft tip 104, and the inner core 2 also has a soft tip. When the guidewire A needs to turn within the human cavity 3, the softness of the two soft tips can effectively buffer the force between the guidewire A and the cavity wall, allowing the guidewire A to change its direction of travel and reducing the risk of damage to the cavity due to difficulty in turning. Moreover, it allows the guidewire A to have sufficient longitudinal thrust, enabling it to smoothly enter the curved or obstructed parts of the human cavity 3.

[0037] Refer to Figure 1The scale line 101 also has a first marking line 101a and a second marking line 101b. For example, if the spacing between two adjacent scale lines 101 is set to 1mm, then the scale line 101 every 5mm is marked as the first marking line 101a, which is a thickened circular line. The scale line 101 up to 10mm is marked as the second marking line 101b, which is two thickened circular lines. This allows doctors to know the specific length more quickly.

[0038] In summary, this utility model discloses a guidewire for imaging and length determination in urological surgery, comprising an inner core and an outer sheath. The imaging rings on the inner core and the graduation lines on the outer sheath correspond one-to-one. During use, the guidewire is inserted into the body cavity, and the surgeon can directly determine the length of the guidewire inserted into the body via the graduation lines, effectively avoiding unnecessary damage to tissues caused by excessively long or deep insertion. During ureteral stricture surgery using X-ray fluoroscopy, the imaging rings become visible. Because the imaging rings correspond one-to-one with the graduation lines, the surgeon can accurately determine the length of the stricture by counting the number of imaging rings located in the narrowed segment of the body cavity, thereby assisting in selecting a more appropriate dilation technique and improving the efficiency and rationality of dilation treatment. This guidewire has a simple structure and strong practicality.

[0039] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A guidewire for imaging localization and length determination in urological surgery, characterized in that, include: The inner core has multiple developing rings arranged at certain intervals along its length on its outer peripheral surface, and the developing rings can be developed under X-ray fluoroscopy. The outer tube covers the inner core, and its outer circumferential surface is provided with scale lines that correspond one-to-one with the imaging ring and are axially aligned. The scale lines are used to determine the position of the guidewire in the human body cavity.

2. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, The inner core and the developing ring are either integrally formed or formed separately.

3. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, The outer circumferential surface of the inner core is provided with a plurality of annular grooves along its axial direction, and the developing ring is embedded in the annular grooves, the depth of the annular grooves being matched with the thickness of the developing ring.

4. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, The distance between two adjacent developing rings is 5mm-20mm, and the number of developing rings is 10-40.

5. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, Multiple developing rings define a developing segment, and multiple scale lines define a measuring segment. The developing segment and the measuring segment correspond to each other in axial length, and the length of the developing segment is equal to the length of the measuring segment.

6. The guidewire for imaging localization and length determination in urological surgery according to claim 5, characterized in that, The lengths of both the developing section and the measuring section are 100mm-400mm.

7. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, The outer tube and the scale lines are either integrally formed or formed separately.

8. The guidewire for imaging localization and length determination in urological surgery according to claim 1, characterized in that, The outer tube includes a tube body and a flexible head disposed at the front end of the tube body. The diameter of the flexible head gradually decreases along the axial direction to form a tapered structure, and one end of the inner core mates with the flexible head.

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