Spiral positioner
By designing a spiral locator, which uses a spiral slide and slider to drive the push rod to rotate, the spiral locator is inserted into the tissue surrounding the tumor. This solves the problem of inaccurate positioning and damage to blood vessels and nerves in existing technologies, and enables real-time tumor positioning and safe surgery.
Patent Information
- Application Number
- CN202423018306.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In existing technologies, during minimally invasive surgery, puncture instruments cannot efficiently locate the position of tumors inside organs in real time, and the location and depth of tumors cannot be determined by the naked eye and touch, which increases the difficulty of the surgery. Furthermore, existing positioning methods are prone to damaging blood vessels and nerves.
A spiral locator is used, which uses a spiral slide and slider on the needle sheath and push rod to drive the push rod to rotate. The spiral locator is then screwed into the tissue around the tumor and fixed with the tissue by compression, avoiding damage to blood vessels and nerves.
This allows for real-time tumor localization, avoiding damage to blood vessels and nerves, and improving the accuracy and safety of the surgery.
Smart Images
Figure CN223759898U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical devices, specifically relating to a spiral positioner for real-time positioning during tumor surgery. Background Technology
[0002] Intraoperative real-time localization of tumors located inside solid organs is a surgical challenge, particularly in the resection of tumors in solid organs such as the liver, pancreas, lungs, skull, and kidneys. These tumors are often small and deep within the organ, making it impossible to determine their location and depth by sight or touch. In such cases, real-time tumor localization is crucial, especially in minimally invasive surgeries.
[0003] Currently, minimally invasive surgery typically employs puncture positioning needles for real-time tumor localization. First, a puncture is inserted into the organ, then a coil or positioning hook is released and anchored near the tumor for real-time localization. For coil-type puncture positioning needles, the coil expands and is fixed by compressing with surrounding tissues. While this avoids damage to blood vessels and nerves during release, the anchoring effect is poor, resulting in limited real-time guidance for surgical resection. For hook-type puncture positioning needles, the hook's tip is sharp, requiring further penetration of surrounding tissue during release, deforming into a hook shape. This provides good anchoring, but the sharp tip can easily damage nearby blood vessels and nerves, and the hook itself is less comfortable for the patient. Summary of the Invention
[0004] To address the aforementioned problems, this invention aims to provide a spiral positioner that ensures good real-time positioning while avoiding damage to blood vessels and nerves.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a spiral positioner, comprising a needle sleeve, a positioning needle core, and a push rod. The needle sleeve has a needle sleeve handle at its rear end, and the push rod has a push rod handle at its rear end; the needle sleeve and the push rod are coaxially arranged. The positioning needle core includes a spiral positioner and a metal wire. The spiral positioner is located inside the front end of the needle sleeve. One end of the metal wire is fixedly connected to the rear end of the spiral positioner, and the other end extends through the push rod to the rear end of the push rod handle. A spiral slide is provided on the inner side of the needle sleeve handle, and a slider is provided on the outer side of the push rod handle, the slider being able to slide along the spiral slide. A buckle is provided at the front end of the push rod handle, and a matching groove is provided at the rear end of the spiral positioner.
[0006] Furthermore, a spring is fitted onto the push rod, located between the slider and the needle sleeve handle.
[0007] Furthermore, there are two sliders, symmetrically arranged on both sides of the push rod handle, and two corresponding spiral slides are also provided.
[0008] Furthermore, the starting end of the spiral slide is provided with a limiting groove, and the connection between the limiting groove and the spiral slide is a smooth arc transition.
[0009] Furthermore, the rear end of the spiral positioner is provided with symmetrical fixing ears. When the spiral positioner is located inside the front end of the needle sheath, the fixing ears are bound inside the needle sheath. When the spiral positioner is pushed out of the needle sheath, the free end of the fixing ears bends outward.
[0010] Furthermore, the fixing ear is a pre-shaped shape memory alloy strip.
[0011] Furthermore, the spiral positioner has a blunt tip.
[0012] Furthermore, the needle sheath has a beveled needle tip.
[0013] Furthermore, the needle sheath handle is provided with an openable and closable silicone sealing valve.
[0014] Furthermore, the rear end of the push rod handle is provided with an openable and closable silicone sealing valve.
[0015] This novel spiral locator utilizes a spiral track and slider on the needle sheath and push rod. As the slider slides along the spiral track, it rotates the push rod, which in turn rotates the spiral locator that is engaged with the push rod. When the spiral locator enters the tissue surrounding the tumor, it compresses and fixes itself to the surrounding tissue, thus firmly anchoring the tumor in real-time. Simultaneously, because the spiral locator rotates into the tissue surrounding the tumor, and blood vessels and nerves possess a certain degree of elasticity, the spiral insertion process compresses blood vessels and nerves to the side, preventing puncture and effectively avoiding damage to surrounding blood vessels and nerves. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the spiral positioner of this utility model;
[0017] Figure 2 for Figure 1 A cross-sectional view of the front part;
[0018] Figure 3 for Figure 1 A cross-sectional view of the rear section;
[0019] Figure 4 A schematic diagram of the structure for extending the needle sleeve of the spiral positioner;
[0020] Figure 5 This is a schematic diagram showing the spiral positioner inside the needle sleeve.
[0021] Figure 6 A schematic diagram showing the state of the spiral positioner with the needle sleeve extended;
[0022] Figure 7 This is a schematic diagram of the track structure;
[0023] In the above figure: 1-Needle sheath; 11-Needle sheath handle; 12-Spiral slide; 13-Limiting slot; 2-Positioning needle core; 21-Spiral positioner; 22-Metal wire; 23-Slot; 24-Fixing ear; 3-Push rod; 31-Push rod handle; 32-Slider; 33-Snap buckle; 34-Spring; 35-Cap. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.
[0025] Example 1
[0026] This embodiment provides a spiral positioner, the structure of which is as follows: Figure 1-7 As shown, it includes a needle sleeve 1, a positioning needle core 2, and a push rod 3. The needle sleeve 1 has a needle sleeve handle 11 at its rear end, and the push rod 3 has a push rod handle 31 at its rear end. The push rod 3 has a hollow structure, and the needle sleeve 1 is nested on the outside of the push rod 3. The two are coaxially arranged.
[0027] The positioning needle core 2 includes a spiral positioner 21 and a metal wire 22. The spiral positioner 21 is placed inside the front end of the needle sleeve 1. One end of the metal wire 22 is fixedly connected to the rear end of the spiral positioner 21, and the other end extends through the push rod 3 to the rear end of the push rod handle 11. A spiral slide 12 is provided on the inner side of the needle sleeve handle 11, and a slider 32 is provided on the outer side of the push rod handle 31. The slider 32 can slide along the spiral slide 12. A buckle 33 is provided at the front end of the push rod 3, and a matching slot 23 is provided at the rear end of the spiral positioner 21.
[0028] When using the aforementioned spiral locator, first insert the needle tip of the needle sheath 1 into the vicinity of the tumor. Then, press down on the push rod 3. The slider 32 on the outer side of the push rod handle 31 slides along the spiral track 12, causing the push rod 3 to rotate. Since the latch 33 at the front end of the push rod 3 and the slot 23 at the rear end of the spiral locator 21 engage, when the push rod 3 rotates, it causes the spiral locator 21 to rotate downwards, thus screwing the spiral locator 21 into the vicinity of the tumor and compressing and fixing it against the surrounding tissue. After removing the needle sheath 1 and the push rod 3, the tail end of the metal wire 22 is outside the body and can be fixed to the skin. This allows for real-time tumor localization using the spiral locator, facilitating subsequent resection surgery.
[0029] In this embodiment, the spiral locator utilizes a spiral track 12 and a slider 32 on the needle sleeve 1 and the push rod 3. When the slider 32 slides along the spiral track 12, it drives the push rod 3 to rotate, which in turn drives the spiral locator 21, which is engaged with the push rod 3, to rotate. When the spiral locator 21 spirals into the tissue surrounding the tumor, it is compressed and fixed against the surrounding tissue, thus firmly anchoring itself in the tissue surrounding the tumor for real-time tumor localization. Simultaneously, because the spiral locator 21 rotates into the tissue surrounding the tumor, and blood vessels and nerves possess a certain degree of elasticity, the spiral insertion process can compress blood vessels and nerves to the side, preventing puncture and effectively avoiding damage to surrounding blood vessels and nerves.
[0030] Example 2
[0031] This embodiment is based on the foregoing embodiments, such as... Figure 3 As shown, a spring 34 is fitted onto the push rod 3, located between the slider 32 and the needle sleeve handle 11. By setting the spring 34, the push rod handle 31 can automatically return to its original position after the pressure on it is released, making it convenient to use.
[0032] Example 3
[0033] Based on the previous embodiments, this embodiment has two sliders 32, symmetrically arranged on both sides of the push rod handle 31, and two corresponding spiral slides 12 are also provided. The symmetrical arrangement of the sliders 32 and the corresponding spiral slides 12 makes the push rod 3 slide more stably and more smoothly when sliding downwards.
[0034] Example 4
[0035] This embodiment is based on the foregoing embodiments, such as... Figure 7 As shown, a limiting groove 13 is provided at the starting end of the spiral slide 12, and the connection between the limiting groove 13 and the spiral slide 12 is a smooth arc transition. The limiting groove 13 allows the slider to remain stationary in the limiting groove 13 when the push rod handle 31 is not under force, maintaining relative fixation with the needle sleeve 1. The smooth arc transition at the connection between the limiting groove 13 and the spiral slide 12 allows the needle sleeve handle 31 to smoothly slide from the limiting groove 13 into the spiral slide 12 when slightly under force.
[0036] Example 5
[0037] This embodiment, based on the aforementioned embodiments, aims to further anchor the spiral positioner 21, such as... Figure 5-6As shown, the rear end of the spiral positioner 21 is provided with symmetrical fixing ears 24. When the spiral positioner 21 is located inside the front end of the needle sheath 1, the fixing ears 24 are bound inside the needle sheath 1, as shown in the figure. When the spiral positioner 21 is pushed out of the needle sheath 1, the free end of the fixing ear bends outward. The fixing ear 24 is a pre-shaped shape memory alloy strip. After the fixing ear 24 bends outward, it is squeezed and fixed with the surrounding tissue, which can effectively prevent the spiral positioner 21 from rotating outward and displacing.
[0038] Example 6
[0039] This embodiment, based on the previous embodiments, uses a blunt-tipped spiral locator. The blunt-tipped design further protects surrounding blood vessels and nerves, preventing damage to them. The needle sheath has a beveled tip for easy puncture.
[0040] Example 7
[0041] Based on the previous embodiments, this embodiment is provided with an openable and closable silicone sealing valve on the needle sleeve handle 11, which can ensure the sealing of the needle sleeve 1 after the push rod 3 is pulled out, preventing the needle sleeve 1 from connecting with the outside world and allowing air to enter the body.
[0042] Example 8
[0043] Based on the aforementioned embodiments, this embodiment features an openable and closable silicone sealing valve, preferably a cross-shaped silicone sealing valve, at the rear end of the push rod handle 31. This serves two purposes: firstly, to ensure the sealing of the push rod and prevent air from entering the body during puncture; and secondly, to allow for the injection of anesthetic into the body via a syringe during puncture, thus alleviating the patient's pain. A cap 35 is also provided at the rear end of the push rod handle 31, and the cap 35 is screwed onto the rear end of the push rod handle 31.
[0044] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A spiral positioner comprising a needle sleeve, a positioning needle core and a push rod, a needle sleeve handle is arranged at the rear end of the needle sleeve, a push rod handle is arranged at the rear end of the push rod, and the needle sleeve and the push rod are coaxially arranged; characterized in that, The positioning needle core comprises a spiral locator and a wire, the spiral locator is arranged at the front end inside the needle sleeve, one end of the wire is fixedly connected with the rear end of the spiral locator, and the other end of the wire extends to the rear end of the push rod handle through the push rod; a spiral slide is arranged on the inner side of the needle sleeve handle, a sliding block is arranged on the outer side of the push rod handle, and the sliding block can slide along the spiral slide; a buckle is arranged at the front end of the push rod handle, and a clamping groove matched with the buckle is arranged at the rear end of the spiral locator.
2. The helical positioner of claim 1, wherein, A spring is arranged on the push rod between the sliding block and the needle sleeve handle.
3. The helical positioner of claim 2, wherein, The sliding block has two parts, which are symmetrically arranged on both sides of the push rod handle, and two spiral slides are arranged correspondingly.
4. The helical positioner of claim 3, wherein, The starting end of the spiral slide is provided with a limiting clamping groove, and the connection between the limiting clamping groove and the spiral slide is arc-shaped and smoothly transitions.
5. The helical positioner of claim 4, wherein, The rear end of the spiral locator is provided with symmetrical fixed ears, when the spiral locator is located at the front end inside the needle sleeve, the fixed ears are bound in the needle sleeve, when the spiral locator is pushed out of the needle sleeve, the free end of the fixed ear is bent outward.
6. The helical positioner of claim 5, wherein, The fixed ear is a pre-shaped memory alloy strip.
7. The helical positioner of claim 6, wherein, The spiral locator is blunt.
8. The helical positioner of claim 7, wherein, The needle sleeve has an inclined needle tip.
9. The helical positioner of claim 8, wherein, A closable silica gel sealing valve is arranged on the needle sleeve handle.
10. The helical positioner of claim 9, wherein, A closable silica gel sealing valve is arranged at the rear end of the push rod handle.