Polyp in-situ snare measuring device used under endoscope

Abstract

A polyp in-situ snare measuring device used under an endoscope mainly comprises a snare ruler, a push-pull rod, a sheathing canal and a control handle. The front end of the push-pull rod can freely deflect along with the head end of the endoscope, so that the snare ruler can directly cover the surface of the polyp for in-situ measurement, and the polyp measurement precision is guaranteed. According to the utility model, while the polyp size is measured, various diagnosis and treatment functions such as lavage, liquid medicine spraying and radiography can be implemented.

Description

Technical Field

[0001] The present application relates to an in-situ polyp snare measuring device used under endoscopy, which is a medical device used in conjunction with endoscopic diagnosis and treatment. Background Art

[0002] Minimally invasive diagnostic and treatment techniques such as gastroscopy and colonoscopy are used in early-stage digestive tract tumor screening and polypectomy procedures, offering advantages such as simplicity, efficiency, minimal damage, and a quick recovery period. Polyps in the digestive tract are important markers of early tumor development. Medical research has confirmed that early detection of digestive tract polyps through endoscopic examinations and prompt endoscopic resection are effective means of preventing the development and progression of digestive tract cancers, reducing their morbidity and mortality.

[0003] The European Society of Gastrointestinal Endoscopy (ESGE) Guidelines for Colorectal Polypectomy (2017 Edition) state in the "Definition and Classification of Polyps" that polyps should be described and reported according to their location, size (in mm), and morphology during endoscopic examination. Furthermore, in the "Definition of Polypectomy and Mucosal Resection," the guidelines further clarify that different surgical procedures should be selected based on polyp size. For example, cold snare polypectomy is recommended for tiny polyps ≤5 mm or small polyps 6-9 mm; hot snare polypectomy (HSP) is recommended for flat and sessile polyps 10-19 mm; and conventional (diathermal-based) endoscopic mucosal resection (EMR) is recommended for sessile adenomatous polyps ≥20 mm. Therefore, polyp size is one of the key clinical indicators for selecting the surgical procedure during endoscopic examination or polypectomy. However, due to the limitations of existing endoscopes, which lack the ability to accurately measure polyp size, polyp size measurement relies heavily on the endoscopist's estimation. However, due to factors such as fisheye lens distortion and changes in polyp size caused by lens zoom, existing visual estimation methods are subject to significant subjectivity. A study conducted by the Gastroenterology Department of Centro Hospitalar de Leilia in Portugal, which included 573 polyps, examined the discrepancies between polyp size reported by endoscopists and pathological measurements. The results showed that the error rate in polyp estimation was as high as 62.1%, and that polyp size tended to be significantly overestimated by endoscopists.

[0004] Accurately measuring polyp size is crucial for assessing gastrointestinal cancer risk and selecting surgical options. Inaccurate size estimation can lead to misdiagnosis, unnecessary medical procedures, or the selection of the wrong surgical approach. To address the shortcomings of existing technologies, this application proposes a technical solution that can accurately calculate polyp size during endoscopic diagnosis or surgery, meeting an urgent clinical need. Summary of the Invention

[0005] The invention discloses an in-situ polyp snare measuring device used under endoscope, which mainly comprises a snare ruler, a push-pull rod, a sheath tube and a control handle.

[0006] The snare ruler is a flexible ruler with free deformation and shape memory performance. The shape of the snare ruler is a perfect circle, and the inner diameter of the snare ruler is between 5mm and 20mm.

[0007] The snare ruler is made of a fine guidewire material with shape memory properties, including but not limited to shape memory alloy (SMA) guidewires or shape memory polymer (SMP) guidewires. For example, shape memory alloys such as nickel-titanium-based, copper-based, iron-based, and other shape memory alloys can be used; or shape memory polymers such as silicone rubber, thermoplastic polyester elastomers, thermoplastic polystyrene-butadiene elastomers, thermoplastic polyurethane elastomers, and cross-linked thermoplastics can be used.

[0008] In one embodiment, the snare ruler is a perfect circular coil made from an alloy memory wire with an outer diameter between 0.1mm and 0.3mm. For example, a 0.1mm nickel-titanium alloy wire can be used to create a perfect circular snare ruler. Depending on the measuring range, the snare ruler's inner diameter is available in four sizes: 5mm, 10mm, 15mm, and 20mm. In clinical practice, physicians can select an appropriate snare ruler size based on the size of the polyp visually assessed under endoscopy.

[0009] The surface of the memory wire on the outer periphery of the snare ruler is provided with a scale indication, and the minimum scale indication of the snare ruler is 1 mm. Alternatively, scale indications or marks are printed at the 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock positions on the surface of the memory wire on the outer periphery of the snare ruler.

[0010] The snare ruler can be folded or contracted in the inner cavity of an endoscope instrument channel or a sheath tube, and can quickly return to its original perfect circle shape after being released from the endoscope instrument channel or the sheath tube.

[0011] In one embodiment, the snare ruler utilizes a spiral structure composed of 2-4 circles of varying inner diameters. When closed, the snare ruler resembles a snake coil, and when extended, it resembles a telescopic spring. The inner diameters of the circles range from 5 mm to 20 mm, with the circles of varying inner diameters naturally transitioning into each other. The final circle of the snare ruler is integrated with the head of the push-pull rod. For example, the snare ruler may be composed of two circles with inner diameters of 10 mm and 20 mm, or three circles with inner diameters of 10 mm, 15 mm, and 20 mm, or four circles with inner diameters of 5 mm, 10 mm, 15 mm, and 20 mm, forming a spiral structure. The spiral structure of the snare ruler is arranged from front to back according to the inner diameter of the circles, with the final circle of the snare ruler integrated with the head of the push-pull rod. For example, the snare ruler may be arranged from small to large, or from large to small, according to the inner diameter of the circles.

[0012] Preferably, the snare ruler is arranged in order from small to large according to the inner diameter of the circle. For example, the snare ruler adopts a spiral structure of three circles with inner diameters of 10mm, 15mm and 20mm. The inner diameter of the first circle at the front end is 10mm, the inner diameter of the second circle is 15mm, and the inner diameter of the third circle at the rear end is 20mm. They are arranged in sequence, and the third circle is combined with the head of the push-pull rod.

[0013] The push-pull rod is a slender flexible tube or guide wire used to push or retrieve the snare ruler. The snare ruler is firmly combined with the head of the push-pull rod, and the tail of the push-pull rod is combined with the control handle.

[0014] After the push-pull rod enters the endoscope channel, the front end of the push-pull rod can freely deflect along with the head end of the endoscope, adjust the angle of the snare ruler, make the snare ruler directly cover the surface of the polyp, and circle the polyp on the inner circumference of the snare ruler for in-situ measurement, ensuring the accuracy and convenience of polyp measurement.

[0015] In one embodiment, the push-pull rod is made of medical polymer material, extruded into a slender elastic tube, and cut into suitable lengths. For example, a polymer material such as tetrafluoroethylene or nylon is used, prepared by an extrusion process, and cut into suitable lengths. Alternatively, the push-pull rod can also be made of a guide wire made of stainless steel or titanium alloy, and cut into suitable lengths. In order to enhance the passing performance within the endoscopic instrument channel, the push-pull rod is required to have a smooth surface, elastic tubing, and a certain degree of rigidity. The push-pull rod is suitable for being able to push or withdraw the snare ruler within the endoscopic instrument channel and to be able to deflect freely with the endoscope head end.

[0016] The push-pull rod has a length between 900mm and 2500mm and is available in various lengths depending on the intended patient (e.g., children and adults) and the endoscopic diagnostic and treatment site (e.g., gastroscopy or colonoscopy). The push-pull rod has an outer diameter between 1mm and 3.0mm and is available in various outer diameters depending on the inner diameter of the endoscope instrument channel. Furthermore, to prevent the snare ruler from repeatedly entering and exiting the endoscope instrument channel and rubbing against it, causing damage to the inner wall of the endoscope instrument channel; or to prevent friction when the snare ruler moves in and out quickly, causing wear on the outer ring of the snare ruler, wear on the scale markings, or irreversible deformation due to frictional heat, which affects the measurement accuracy of the snare ruler, the outer periphery of the push-pull rod is also provided with a sheath, which is a flexible tube with an internal passage for the push-pull rod and the snare ruler.

[0017] The outer diameter of the sheath should be ≤3.0mm, and the length of the sheath should be compatible with the length of the push-pull rod. Specifically, after the push-pull rod is fully inserted into the sheath, the snare at the front end of the push-pull rod should be completely exposed at the head of the sheath, and the sheath should be able to move freely in and out of the endoscope instrument channel.

[0018] Furthermore, a fluid perfusion channel is provided between the sheath and the push-pull rod, with a perfusion port at the rear end. This channel is used to inject irrigating fluid, medical solution, or contrast agent onto the surface of the polyp. During endoscopic diagnosis and treatment, it can simultaneously measure polyp size and perform various diagnostic and treatment functions, including irrigating, spraying medical solution, and imaging.

[0019] The fluid perfusion channel can be either a gap channel formed between the inner wall of the sheath and the outer wall of the push-pull rod, or a dedicated fluid passageway provided on the inner wall of the sheath. For example, if the inner diameter of the sheath is 2.2 mm and the outer diameter of the push-pull rod is 1.0 mm, the gap between the inner wall of the sheath and the outer wall of the push-pull rod will naturally form a fluid perfusion channel. In another embodiment, the sheath is configured as a dual-lumen catheter, with one lumen serving as the fluid perfusion channel and the other serving as the sheath for the snare and push-pull rod.

[0020] Typically, the sheath is extruded from medical polymer materials, such as tetrafluoroethylene, nylon, and the like, and is prepared by an extrusion process and cut into suitable lengths.

[0021] The outer perimeter of the snare ruler is also equipped with a height gauge, which intersects the coil of the snare ruler at right angles. The height gauge has a maximum reading of 5mm-10mm and a minimum scale of 1mm. The height gauge can be integrally formed with the snare ruler or welded together.

[0022] In one embodiment, the combination of the snare ruler and the push-pull rod is used as a height ruler. Specifically, a measuring scale is provided on the head of the push-pull rod, and the head of the push-pull rod and the outer periphery of the snare ruler are vertically intersected and combined. The intersection point of the intersection combination is marked as the height value of 0mm. From the 0mm value upward, the height indication of 1mm to 20mm is marked on the head of the push-pull rod to form a height ruler for measuring the height of polyps.

[0023] In another embodiment, the snare ruler and the push-pull rod are integrally formed. For example, a shape memory alloy is processed into a guide wire, the head of the guide wire is processed into the snare ruler and can meet the technical requirements of folding or compressing, and the rear guide wire meets the requirements of the push-pull rod. The snare ruler guide wire and the rear guide wire serving as the push-pull rod are provided with measuring scales.

[0024] The control handle is provided at the end of the push-pull rod and is a control device for advancing or withdrawing the snare ruler within the endoscope instrument channel. The structure and shape of the control handle are not limited, and the structure and size that meet ergonomic requirements and can be easily grasped and operated by the doctor are appropriate.

[0025] The specific clinical measurement method of this application is as follows: when measuring a polyp, grasp the sheath tube by hand, pull the push-pull rod backward, and naturally fold or compress the snare ruler into the sheath tube, and temporarily store the snare ruler inside the lumen of the sheath tube head. After the sheath tube is delivered to the target polyp site through the endoscope instrument channel, use the control handle to operate the push-pull rod forward toward the endoscope head end, and completely release the snare ruler from the lumen of the sheath tube head. After the snare ruler is released from the lumen of the sheath tube head end, adjust the deflection angle of the endoscope head end to encircle the polyp within the inner circumference of the snare ruler. Utilizing the mathematical characteristics of a perfect circle, including diameter, radius, circumference, and area, the polyp is measured in situ under endoscopic visual conditions.

[0026] When using a spiral-shaped snare ruler composed of 2-4 circles of different inner diameters, for example, a four-circle snare ruler, first release a 5mm snare ruler to encircle the polyp within the inner circumference of the snare ruler for in-situ measurement. If the snare ruler of this size cannot completely encircle the polyp within the inner circumference of the snare ruler, then release a 10mm, 15mm, or 20mm snare ruler in sequence for in-situ measurement, and so on, to improve the accuracy of in-situ measurement. After the polyp measurement is completed, use the control handle to pull back the push-pull rod to retract the snare ruler into the lumen of the sheath head, and then withdraw the sheath, push-pull rod, and snare ruler from the endoscope instrument channel. During this period, contrast agent can be injected into the polyp site, liquid medicine can be sprayed, or irrigation can be performed through the perfusion port of the fluid perfusion channel.

[0027] In actual production, to prevent the scales of the snare ruler or height gauge from becoming inaccurate due to pressure deformation during storage and transportation, a protective cover is placed around the snare ruler and height gauge. The outer shape of the cover is not limited, and the interior of the cover contains a protective cavity, which encloses the snare ruler and height gauge. The protective cover is made of a hard medical polymer material or metal material, such as medical-grade polyvinyl chloride or polypropylene plastic, or aluminum alloy.

[0028] The clinical use of this application is to be used for the physical measurement of the size of polyps in the digestive tract under endoscopy, and to simultaneously realize clinical functions including irrigation, spraying of liquid medicine and angiography.

[0029] The beneficial effects of this application include: (1) The snare ruler is a perfect circular flexible ruler made of shape memory material, which can be folded or compressed in the endoscope channel; after the snare ruler is pushed to the periphery of the polyp, the snare ruler is released and stretches or returns to a perfect circle with high shape stability.

[0030] (2) The front end of the push-pull rod can deflect freely following the end of the endoscope head, so that the snare ruler can directly cover the surface of the polyp for in-situ measurement, ensuring the accuracy of polyp measurement.

[0031] (3) A height scale is also provided on the outer circumference of the snare, which can simultaneously perform physical measurement of the polyp height, thus forming more abundant polyp size data. This overcomes the estimation error caused by the distortion and zoom of the fisheye lens of the endoscope in the existing technology, and fills the technical gap in the accurate physical measurement of polyp morphology.

[0032] (4) A fluid perfusion channel is provided between the sheath and the push-pull rod, which integrates multiple functions, including the injection of dye to mark the polyp boundary, polyp size measurement, polyp surgical flushing, and medication after polyp removal. All of these functions can be effectively implemented using one instrument, reducing the number of instrument replacements. From single measurement to integrated diagnosis and treatment, medical efficiency is improved and the consumption of medical consumables is reduced.

[0033] (5) After the model and specifications of the snare ruler are selected, the diameter and area of ​​the snare ruler are known (i.e., the diameter and area of ​​the circle), and the snare ruler is provided with a scale indication. With the increasing popularity of the development and application of medical decision-making support software or mathematical calculation applets, it is beneficial for the AI-assisted image analysis software to automatically and quickly calculate the polyp size or total area after the endoscope lens is identified, and the results are superimposed on the endoscope screen in real time. This application is expected to become an "intelligent ruler" for endoscopic surgery.

[0034] The present invention has low preparation cost, simple operation, safety and reliability, and is worthy of clinical promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application Figure 2 This is a schematic diagram of the combination of a push-pull rod and a snare ruler according to an embodiment of the present application. Figure 3 This is a close-up diagram of the trap ruler, height gauge and push-pull rod head of this application Figure 4 This is a schematic diagram of the snare ruler after being released from the front end of the sheath tube. Figure 5 This is a schematic diagram of the push-pull rod, snare ruler and double-lumen sheath tube with a fluid perfusion channel of the present application. Figure 6 This is a schematic diagram of a spiral structure of a snare ruler and a push-pull rod combination using four circles of different inner diameters. Figure 7 This is a schematic diagram of the application of this application for in situ measurement of polyps in clinical practice As shown in the figure: snare ruler 10, scale indication 101, push-pull rod 20, control handle 201, height gauge 30, sheath 40, fluid perfusion channel 50, perfusion interface 501, perfusion channel sealing cover 502, polyp 60 DETAILED DESCRIPTION

[0036] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0037] 1. Example 1: Preparation of a Circular Snare Ruler 10 with a Measuring Range of 20 mm 1.1 Technical requirements for circular loop ruler 10: circumference 62.8mm (calculated based on the inner circumference of the circle), diameter 20mm, minimum scale indication 101 is 1mm.

[0038] 1.2 Material: The guide wire is made of nickel-titanium alloy (Ni-Ti) with shape memory properties, and the outer diameter of the guide wire is 0.1mm.

[0039] 1.3 Design of winding forming mold: Design and prepare the winding forming mold for the snare ruler 10. The mold is required to be a standard cylinder with an outer circumference of 62.8mm and a diameter of 20mm. The outer circumference of the cylinder is provided with a winding limit groove with a width of 0.13mm.

[0040] 1.4 Forming of the Loop Ruler 10: Insert the nickel-titanium alloy guide wire into the winding limit groove, with the head end of the nickel-titanium alloy guide wire flush with the outer circumference of the cylinder. Wind the nickel-titanium alloy guide wire around the outer circumference of the cylinder in a clockwise direction, apply pre-tightening tension, and send it into a tubular low-temperature heating furnace for heat treatment. The temperature of the low-temperature heating furnace is set between 350℃ and 450℃, and the holding time is 3 minutes. Annealing, immerse in cold water for rapid cooling and shaping, the round loop ruler 10 after shaping should meet Figure 2 requirements.

[0041] 1.5 Use precision screen printing equipment to print the scale on the outer periphery of the loop ruler 10. The scale indication 101 is 1mm, and the scale should be clearly discernible with the naked eye or after magnification 2-3 times.

[0042] 1.6 After preparation, use a precision vernier caliper to measure the measurement accuracy of the circular loop ruler 10. The shape, outer circumference, diameter and scale indication 101 of the loop ruler 10 should meet the design requirements.

[0043] It should be noted that circular snare rulers 10 of other different measuring ranges (5mm, 10mm, 15mm) can be prepared by referring to the above technical solution and selecting winding molds of different diameters. If a snare ruler with a spiral structure composed of 2-4 circles of different inner diameters is used, a conical winding mold is used. Two to four circular winding limit grooves of different inner diameters are sequentially provided on the outer circumference of the conical winding mold. A nickel-titanium alloy guide wire is continuously wound around the outer circumference of the conical winding mold, and the two to four circles of different inner diameters are sequentially connected. This is combined with other processes of this embodiment 1 to prepare a snare ruler with a spiral structure, which will not be described in detail.

[0044] 2. Example 2: Preparation of a snare ruler 10 with a fluid perfusion channel 50 2.1 Mould design and manufacturing 2.1.1 As Figure 1 The structure shown is designed and manufactured respectively for the extrusion molds of the push-pull rod 20 and the sheath tube 40 , and the injection molds of the control handle 201 , the perfusion interface 501 , and the perfusion channel sealing cover 502 .

[0045] 2.1.2 The extrusion die of the push-pull rod 20 is suitable for extrusion molding of nylon pipes with an outer diameter of 1.0 mm.

[0046] 2.1.3 The extrusion die of the sheath tube 40 is suitable for extrusion molding of nylon tubes. The outer diameter of the extruded sheath tube 40 is 2.6 mm and the inner diameter is 2.0 mm.

[0047] 2.1.4 The injection interface 501 mold is suitable for injection molding of nylon materials. The injection interface 501 is trumpet-shaped, with an opening diameter of 60mm and a sealing cover at the opening; the tail is a slender round tube with an outer diameter of 2.6mm and an inner diameter of 1.2mm.

[0048] 2.1.5 The injection mold for control handle 201 is suitable for injection molding of polyvinyl chloride. Control handle 201 is a cylindrical handle with a length of 100 mm and an outer diameter of 30 mm. A push-pull rod mounting hole with an inner diameter of 1.6 mm and a depth of 8 mm is located in the center of the head of control handle 201. The outer periphery of control handle 201 is provided with an irregular concave-convex anti-slip structure.

[0049] 2.1.6 The perfusion channel sealing cover 502 is a cap-shaped structure with a central through hole diameter of 1.1 mm, an inner concave surface diameter of 2.7 mm, and a concave surface depth of 5 mm.

[0050] 2.2 Material production 2.2.1 Use nylon 1010 material and extrusion equipment to extrude push-pull rods 20, and cut them into sections of 1500mm each.

[0051] 2.2.2 Use nylon 1010 and extrusion equipment to extrude the sheath tube 40, and cut it into sections of 1300mm each.

[0052] 2.2.3 Use medical polyvinyl chloride particles and injection molding equipment to prepare a control handle 201.

[0053] 2.2.4 Use nylon 1010 and injection molding equipment to prepare the perfusion interface 501.

[0054] 2.3 Assembly and packaging 2.3.1 Pass the rear end of the push-pull rod 20 through the central through-hole of the perfusion channel sealing cover 502. Use medical glue to glue the rear end of the push-pull rod 20 into the mounting hole at the head of the control handle 201. Glue the perfusion channel sealing cover 502 to the control handle 201, with the concave surface of the perfusion channel sealing cover 502 facing the push-pull rod 20 (as shown in the figure). Figure 1 As shown), the tensile strength of the bonding position shall not be less than 10N.

[0055] 2.3.2 Use high frequency welding equipment to weld the circular loop ruler 10 prepared in Example 1 to the head end of the push-pull rod 20. The push-pull rod 20 and the circular loop ruler 10 should be arranged at a 90-degree vertical structure (such as Figure 2 shown).

[0056] 2.3.3 With the intersection of the push-pull rod 20 and the circular snare ruler 10 as the height value of 0mm, use precision screen printing equipment to print the height indication of 0mm to 20mm on the head of the push-pull rod 20 to form a height ruler 30 for measuring polyp height (such as Figure 2 shown).

[0057] 2.3.4 Use a punching device to open a circular hole with a diameter of 2.7 mm at 50 mm from the tail end of the sheath tube 40. Use medical glue to firmly bond the tail end of the perfusion interface 501 to the circular hole.

[0058] 2.3.5 Place the push-pull rod 20 and the snare ruler 10 into the inner channel of the sheath tube 40. The gap between the push-pull rod 20 and the inner wall of the sheath tube 40 forms a fluid perfusion channel 50.

[0059] 2.3.6 Place the assembled product into a medical outer packaging bag, seal it, sterilize it, and after inspection, set it aside.

[0060] because Figure 5 The manufacturing process of the double-lumen sheath 40 with the fluid perfusion channel 50 shown in FIG. 1 is a conventional technique for manufacturing a multi-lumen catheter, which can be found in FIG. Figure 5 The structure shown adopts the traditional multi-lumen catheter extrusion process to produce the double-lumen sheath 40, combined with the process of this embodiment 2, to prepare a product composed of a push-pull rod, a snare ruler and a double-lumen sheath with a fluid perfusion channel, which will not be described in detail in this description.

[0061] 3. Example 3: Clinical application of this application in colorectal polyp measurement 3.1 After the endoscope enters the colorectum and detects the target polyp 60, the medical staff first estimates the size of the polyp 60 and selects the appropriate size of the snare ruler 10. For example, if the polyp 60 is visually estimated to be approximately 6-8 mm, a 10 mm snare ruler 10 may be selected; if the polyp 60 is visually estimated to be larger than 10 mm, a 15 mm or 20 mm snare ruler 10 may be selected.

[0062] 3.2 Open Example 2 and prepare a 10mm product. Figure 1 As shown, the snare ruler 10 is retracted or folded into the inner cavity of the sheath tube 40 until the front end of the snare ruler 10 is flush with the head of the sheath tube 40 .

[0063] 3.3 Insert the sheath tube 40 into the instrument channel of the endoscope, push the push-pull rod 20 forward by controlling the handle 201, release the snare ruler 10 and the height ruler 30 from the head of the sheath tube 40, and the snare ruler 10 returns to its perfect circular shape (as shown in the figure). Figure 4 As shown), the size and height of the polyp 60 can be measured in situ.

[0064] Specific measurement methods include, for example, Figure 7 As shown, after the inner wall of the intersection of the snare ruler 10 and the height ruler 30 is placed against point A on the outer periphery of the polyp 60, the snare ruler 10 is wrapped around the outer periphery of the target polyp 60. Even through visual inspection, medical staff can accurately determine the surgical method to be used for the target polyp 60 in accordance with the ESGE colorectal polyp resection guidelines. The judgment basis is that if the diameter of the snare ruler 10 used is 10mm, Figure 6 The target polyp 60 is completely covered by the inner circumference of the snare ruler 10. The maximum length of the polyp 60 (from point A to point C) is visually about 8 mm, which is a small polyp 60 (6-9 mm) as defined in the guidelines. Cold snare polypectomy is recommended for removal.

[0065] Then, an endoscope is used to photograph the target polyp trapped by the snare ruler 10. The photo of the polyp 60 is then imported into a computer. Using medical decision-making support software or image processing software, the scale of the snare ruler 10 is used as a reference to accurately calculate the length of the polyp 60 from point A to point C and the width of the polyp 60 from point B to point D, with an accuracy error of no more than 1 mm. Furthermore, computer software's auxiliary line tools (such as length and width auxiliary lines and height auxiliary lines) can be used, using conventional mathematical formulas or artificial intelligence algorithms, to accurately calculate more comprehensive morphological information about the polyp 60, such as its height, circumference, and area, eliminating diagnostic errors caused by estimation.

[0066] During this period, if it is necessary to spray drugs or dyes to the target polyp 60 through the fluid perfusion channel 50, the drug administration operation can be carried out synchronously through the fluid perfusion channel 50. Figure 1 When the product is shown, the control handle 201 is pushed forward further, and the perfusion channel sealing cover 502 is used to seal the gap between the push-pull rod 20 and the tail of the sheath tube 40 (see Figure 4 ), and then inject the liquid medicine into the perfusion interface 501. For example, Figure 5 When using the double-lumen sheath tube 40 shown in the figure, the sealing cover 502 of the perfusion channel is directly opened to inject the medicine.

[0067] The above drawings and embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of this application may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of this application, and all such modifications should be encompassed by the claims of this application. They do not constitute any limitation on the scope of protection of this application.

Claims

1. A polyp in situ snare measuring device for use under endoscopy, mainly comprising a snare ruler (10), a push-pull rod (20), a sheath (40) and a control handle (201); wherein, The snare ruler (10) is a flexible ruler with free deformation and shape memory properties, the push-pull rod (20) is a slender flexible tube or guide wire used to push or retract the snare ruler (10), the snare ruler (10) is firmly combined with the head of the push-pull rod (20), and the tail of the push-pull rod (20) is combined with the control handle (201); the outer periphery of the push-pull rod (20) is also provided with a sheath (40), and the sheath (40) is a flexible pipeline with an inlet and outlet channel for the push-pull rod (20) and the snare ruler (10); its characteristics are: the snare ruler (10) is firmly combined with the head of the push-pull rod (20), and the tail of the push-pull rod (20) is combined with the control handle (201); the outer periphery of the push-pull rod (20) is also provided with a sheath (40), and the sheath (40) is provided with a flexible pipeline inside for the push-pull rod (20) and the snare ruler (10); The rule (10) can be folded or contracted in the lumen of the endoscope instrument channel or the sheath (40), and can quickly return to its original fixed circle shape after being released through the endoscope instrument channel or the sheath (40); after the push-pull rod (20) enters the endoscope channel, the front end of the push-pull rod (20) can freely deflect following the end of the endoscope head, and adjust the angle of the rule (10) so that the rule (10) directly covers the surface of the polyp (60), and the polyp (60) is circled on the inner periphery of the rule (10) for in-situ measurement, thereby ensuring the accuracy and convenience of polyp measurement.

2. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The shape of the snare ruler (10) is a perfect circle, and the inner diameter of the snare ruler (10) is between 5 mm and 20 mm.

3. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The surface of the memory wire on the periphery of the snare ruler (10) is provided with a scale indication (101), or scale indications or marks are printed at the 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock positions on the surface of the memory wire on the periphery of the snare ruler (10).

4. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The snare ruler (10) adopts a spiral structure composed of 2-4 circles with different inner diameters. The snare ruler (10) of the spiral structure is arranged in sequence from front to back according to the size of the circle inner diameter. The last circle of the snare ruler (10) is combined with the head of the push-pull rod (20).

5. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The snare ruler (10) adopts a spiral structure composed of three circles with inner diameters of 10mm, 15mm and 20mm, wherein the inner diameter of the first circle at the front end is 10mm, the inner diameter of the second circle is 15mm, and the inner diameter of the third circle at the rear end is 20mm, which are arranged in sequence, and the third circle is combined with the head of the push-pull rod (20).

6. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: A fluid perfusion channel (50) is further provided between the sheath tube (40) and the push-pull rod (20), and a perfusion interface (501) is provided at the tail of the fluid perfusion channel (50).

7. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The fluid perfusion channel (50) can be a gap channel formed between the inner wall of the sheath tube (40) and the outer wall of the push-pull rod (20), or a dedicated fluid passage provided on the inner wall of the sheath tube (40).

8. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: The sheath is prepared as a double-lumen catheter, one lumen of the double-lumen catheter is used as a fluid perfusion channel, and the other lumen is used as a sheath for the snare ruler and the push-pull rod.

9. The polyp in situ snare measurement device for use under endoscopy according to claim 1, characterized in that: A height scale (30) is further provided on the outer periphery of the snare ruler (10), and the height scale (30) intersects the coil of the snare ruler (10) vertically. The maximum indication value of the height of the height scale (30) is 5 mm to 10 mm, and the minimum scale is 1 mm.

10. The polyp in situ snare measuring device used under endoscopy according to claim 1, characterized in that: When measuring a polyp, after the snare ruler (10) is released from the head cavity of the sheath tube (40), the deflection angle of the endoscope head end is adjusted to circle the polyp (60) around the inner circumference of the snare ruler (10), and the polyp (60) is measured in situ under endoscopic visual conditions using mathematical characteristics including the diameter, radius, circumference and area of ​​a perfect circle.

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