Medical elbow delivery structure

Abstract

The application relates to the field of medical devices and discloses a medical elbow conveying structure which comprises a puncture sleeve handle, a puncture sleeve and an injection handle, the inside of the puncture sleeve is provided with a conveying guide pipe for conveying bone cement, and the inside of the puncture sleeve is further provided with a conveying driving structure for assisting the conveying guide pipe to convey and extend from the inside of the puncture sleeve; the guiding of the guide cylinder and the deformation characteristics of the conveying driving structure can make the conveying driving structure present an arc state after extending, so that the bone cement can be filled in the bone part of a patient; after the puncture sleeve penetrates into human tissues, the puncture sleeve can be kept stationary, the rotating position in the puncture sleeve is adjusted, the specific pointing direction of the conveying driving structure extending from the inside of the puncture sleeve is adjusted, the bone can be filled at multiple points, the puncture sleeve can avoid being used for puncture work for multiple times, the patient can be effectively protected, and traumatic injury to the human body can be avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a medical curved delivery structure. Background Technology

[0002] A flexible bone cement delivery device in medical devices is a tool used in orthopedic surgery, mainly used to deliver bone cement into the patient's bones to strengthen and stabilize them. It typically consists of a puncture assembly, a delivery catheter assembly, a disposable bone cement injector assembly, a mixing bowl, and a mixing spoon. The puncture assembly consists of a delivery catheter and a puncture cannula; the delivery catheter assembly consists of a delivery catheter and a locking device; the delivery catheter consists of a delivery catheter sheath with a handle and a delivery catheter needle with a handle; and the disposable bone cement injector assembly consists of an injector, an extension tube, and a funnel. The injector consists of a handle, a nut, a sleeve, a push rod head, and a silicone ring.

[0003] In current technology, when performing surgery on bones, the puncture component, catheter component, and injection component are inserted into the bone together. Then, the catheter component is extended separately from the bent tip of the puncture component. Therefore, the catheter component is inserted into the bone in a bent position. After the catheter component is inserted into the bone, bone cement is delivered from the injection component to the catheter component, and then the bone cement is delivered to the human bone for filling. However, since the spatial orientation of the delivery catheter assembly after it extends from the puncture assembly is fixed, and there are high individual differences in the cavities, cancellous bone distribution and fracture morphology inside human bones, delivering bone cement by a single puncture may result in the bone not being completely filled. If multiple punctures and injections are performed, the patient's bone and surrounding tissues will be repeatedly damaged, resulting in cumulative trauma. Although some existing technologies allow the puncture component to rotate at an angle after being inserted into the bone, thereby moving the catheter component and changing its orientation after it extends out of the puncture component, the tip of the puncture component is often arc-shaped. When it rotates inside the bone, the arc-shaped tip may not be compatible with different bones, which will directly cause friction between the puncture component and the bone, damaging healthy bone and causing injury to the human body, thus reducing the safety of the surgery. In view of this, the present invention provides a medical curved delivery structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a medical curved delivery structure that solves the problem that in existing technologies, the catheter assembly extends from the puncture assembly at a fixed angle, making it unable to adapt to different bones and thus causing cumulative trauma to the human body due to multiple punctures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A medical curved delivery structure includes a puncture cannula handle, a puncture cannula, and an injection handle. The puncture cannula has a delivery conduit for delivering bone cement inside, and the puncture cannula also has a delivery drive structure for assisting the delivery conduit to extend out from inside the puncture cannula. The delivery drive structure includes a rotatable drive disk, a drive sleeve fixedly connected to the lower part of the drive disk, a drive ring fixedly connected to one end of the drive sleeve, a guide cylinder for guiding the delivery conduit fixedly connected to the lower part of the drive ring, the delivery section below the delivery conduit being inside the guide cylinder and tightly fitted therewith, and a rotating sleeve fixedly connected to the outer side of the guide cylinder for rotating engagement with the puncture cannula.

[0006] Preferably, the outer side of the guide cylinder is fitted with a scraping ring for cleaning its surface. The scraping ring is fixedly connected to the rotating sleeve, and the scraping ring is made of silicone material with high toughness and good sealing performance.

[0007] Preferably, a squeezing ring is provided on the inner side of the scraping ring, a squeezing rod is fixedly connected to one side of the squeezing ring, a push block is slidably contacted at one end of the squeezing rod, a rotatable friction roller is provided at the middle position of the push block, and a friction plate is frictionally connected to the surface of the friction roller.

[0008] Preferably, the friction plate is movably engaged with the bottom of the conveying conduit, and the friction plate has the same angle as the inner arc surface of the guide cylinder. The friction roller rotates to drive the extrusion rod and extrusion ring on one side of the push block to apply extrusion force to the scraping ring.

[0009] Preferably, the outer side of the scraping ring is movably engaged with an inclined post, and one side of the inclined post is provided with a compression spring that is movably connected to the rotating sleeve. One end of the compression spring is fixedly connected to the puncture sleeve.

[0010] Preferably, the compression springs are symmetrically arranged inside the rotating sleeve. When the rotating sleeve rotates, it squeezes the compression spring at one end of the inclined column through the scraping ring, while the compression spring at the other end is stretched.

[0011] Preferably, the drive disc and the puncture cannula handle are rotatably connected, the drive sleeve is fitted onto the straight section surface of the delivery catheter, and the puncture cannula, drive sleeve and delivery catheter are concentrically arranged.

[0012] Preferably, a pair of mating rings that engage with the puncture cannula are fixedly connected to the upper and lower sides of the rotating sleeve, and a sealing gasket is provided at the rotating position.

[0013] Preferably, the extrusion ring is made of a deformable material, and the pusher is configured in a semi-tooth shape.

[0014] Preferably, the bone cement delivery section below the delivery catheter is made of deformation memory material, and the surface of the puncture cannula is provided with scale lines.

[0015] This invention provides a medical curved delivery structure. It has the following beneficial effects: 1. This invention features an arc-shaped scraping ring inside the puncture cannula. When extending from the cannula, the ring is guided by a guide tube and its own deformation characteristics, allowing it to maintain an arc shape after extension. This facilitates bone cement filling of the patient's bone tissue. Once the puncture cannula is inserted into the tissue, it remains stationary. The direction of the extension cannula can be adjusted by changing its rotational position within the cannula. This allows for multi-point bone filling while avoiding repeated punctures, effectively protecting the patient and preventing traumatic injury.

[0016] 2. This invention applies extrusion forces in different directions to the scraping ring using the extrusion ring and the inclined column, thereby adjusting the hardness of the scraping ring when it adheres to the surface. Therefore, the scraping ring can effectively clean the bone cement and blood adhering to the surface. On the one hand, it can ensure that the surface is clean and tidy before being returned to the guide tube inside the puncture cannula. On the other hand, it can prevent jamming when extending into the guide tube, which would affect the efficiency of filling multiple parts of the patient's bone with bone cement. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the entire invention; Figure 3 This is a schematic diagram of the internal structure of the drive component of the present invention; Figure 4 This is an exploded view of the driving component of the present invention; Figure 5 This is a schematic diagram of the extrusion rod and extrusion ring of the present invention; Figure 6 This is a schematic diagram of the friction plate and friction roller of the present invention; Figure 7 This is a schematic diagram of the inclined column and compression spring of the present invention; Figure 8 This is a schematic diagram of the friction roller and pusher block of the present invention; Figure 9 This is a side view schematic diagram of the present invention; Figure 10 This is a side view of the principle state of the driving component of the present invention.

[0018] Among them, 1. puncture cannula handle; 2. puncture cannula; 3. delivery drive structure; 301. drive disc; 302. drive sleeve; 303. drive ring; 304. guide cylinder; 305. scraping ring; 306. rotating sleeve; 307. mating ring; 308. friction plate; 309. friction roller; 310. push block; 311. extrusion rod; 312. extrusion ring; 313. inclined column; 314. compression spring; 4. delivery conduit; 5. injection handle. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 4 As shown, the present invention provides a medical curved delivery structure, including a puncture cannula handle 1, a puncture cannula 2 and an injection handle 5. The puncture cannula 2 is provided with a delivery conduit 4 for delivering bone cement, and the puncture cannula 2 is also provided with a delivery drive structure 3 for assisting the delivery conduit 4 to extend out from the puncture cannula 2. The delivery drive structure 3 includes a rotatable drive disk 301, a drive sleeve 302 fixedly connected to the lower part of the drive disk 301, a drive ring 303 fixedly connected to one end of the drive sleeve 302, a guide cylinder 304 for guiding the delivery of the delivery conduit 4 fixedly connected to the lower part of the drive ring 303, the delivery section below the delivery conduit 4 is located inside the guide cylinder 304 and fits tightly against it, and a rotating sleeve 306 fixedly connected to the outer side of the guide cylinder 304 and rotatably engaged with the puncture cannula 2.

[0021] Please see Figures 1 to 4 As shown, when a patient needs to undergo bone cement filling surgery, the medical staff holds the puncture cannula handle 1 and inserts the puncture cannula 2 into the patient's bone. Then, the delivery catheter 4 is controlled to extend from inside the puncture cannula 2 in an arc-shaped trajectory. After extension, the bone cement can be delivered into the delivery catheter 4 through the injection handle 5. The delivery catheter 4 then delivers the cement to the bone area to be filled. After the bone area is filled, the other side may need to be filled. However, the existing technology either uses multiple punctures or rotates the puncture cannula 2 to adjust the angle. But the puncture cannula 2 is in direct contact with human tissue. Whether it is multiple punctures or controlling the rotation of the puncture cannula 2 in the human body, it will cause traumatic damage to the human body. Therefore, to avoid the above situation, after the bone cement filling of a bone in the patient is completed, the medical staff rotates the drive disc 301 to drive the drive sleeve 302 to rotate. The rotation of the drive sleeve 302 will drive the drive ring 303 to rotate inside the puncture cannula 2. The drive ring 303 will drive the delivery section of the delivery catheter 4 inside the guide cylinder 304 to rotate synchronously. During the rotation of the guide cylinder 304, it will also drive the rotating sleeve 306 to rotate below the puncture cannula 2. Since the rotating sleeve 306 and the puncture cannula 2 are rotatably engaged, the guide cylinder 304 will drive the rotating sleeve 306 to rotate synchronously during the rotation. After the delivery section of the delivery catheter 4 rotates synchronously with the guide cylinder 304 and the rotating sleeve 306 to reach the next filling position, the delivery catheter 4 will be extended out from the inside of the guide cylinder 304 again. Then, the bone cement will be delivered to the delivery section of the delivery catheter 4 through the injection handle 5, thereby filling the bone in the patient. Please see Figure 3 and Figure 4 It should be noted that when the delivery catheter 4 does not extend from the guide tube 304 inside the puncture cannula 2, the outer side of the puncture cannula 2 will form a single unit, such as... Figure 1 As shown, after the puncture cannula 2 is inserted into the human tissue and reaches the bone, the delivery catheter 4 can be controlled to extend from the inside of the puncture cannula 2 via the puncture cannula handle 1. Figure 10 As shown, the extended delivery catheter 4 maintains a certain arc shape due to its own elastic recovery and the dual constraint of the arc-shaped guide cylinder 304. The bone cement delivered by the injection handle 5 fills the bone area through the curved delivery section of the delivery catheter 4. After filling one area, the delivery catheter 4 is retracted back into the guide cylinder 304, ensuring that the entire exterior of the puncture cannula 2 remains intact. Therefore, when the guide cylinder 304 and the rotating sleeve 306 control the rotation of the delivery catheter 4 inside the puncture cannula 2, the puncture cannula 2 remains fixed. When the rotating sleeve 306 rotates synchronously with the guide cylinder 304, it will rotate and come into contact with the human tissue. Although contact with the human body is unavoidable, compared to the existing technology where the entire... The puncture cannula 2 rotates gently within the tissue, thus enhancing the protection of the body. Furthermore, when the delivery catheter 4 extends into the bone for filling, it can be precisely inserted into the bone while maintaining a bent position. The puncture cannula handle 1 and puncture cannula 2 together form the puncture assembly used for surgery, while the delivery catheter 4 and injection handle 5 together form the delivery assembly for injecting bone cement into the bone. The puncture assembly is made of medical-grade stainless steel and medical-grade ABS; the delivery assembly is made of medical-grade stainless steel, medical-grade ABS, and medical-grade PEEK. The mixing bowl and mixing spoon used for stirring and mixing the bone cement are both made of medical-grade polypropylene. The stirring and mixing of bone cement is existing technology and will not be described in detail here.

[0022] Please see Figures 4 to 6 As shown, a scraping ring 305 for cleaning the surface of the guide cylinder 304 is sleeved on the outside. The scraping ring 305 is fixedly connected to the rotating sleeve 306, and the scraping ring 305 is made of silicone material with high toughness and good sealing performance.

[0023] Please see Figures 4 to 6 As shown, when the puncture cannula 2 and the delivery catheter 4 are inserted into the bone site, the delivery catheter 4 needs to extend from the guide tube 304 inside the puncture cannula 2 to the bone site when delivering bone cement. Because bone cement has high viscosity, after the delivery catheter 4 completes the filling of a section of the bone, when it retracts into the guide tube 304, some bone cement will adhere to its surface. Since the guide tube 304 guides the delivery section of the delivery catheter 4, it will always remain in close contact with the surface of the delivery catheter 4. If the delivery catheter 4 takes too long to retract into the guide tube 304, the bone cement on the surface of the delivery catheter 4 will partially solidify with the guide tube 304. This will prevent the delivery catheter 4 from extending out of the guide tube 304 when the next bone needs to be filled, causing the movement of the delivery catheter 4 to become stuck. Although this can effectively change the orientation of the delivery catheter 4 for filling different parts of the bone and avoid damage to the human body caused by multiple punctures, the orientation of the delivery catheter 4 will also be limited, which will reduce the effect of bone cement filling in the patient's bone. Therefore, to avoid the above situation, a scraping ring 305 is slidably provided on the inner side of the rotating sleeve 306 for scraping and cleaning the surface of the delivery conduit 4. The scraping ring 305 is made of a highly resilient material. Therefore, when the delivery conduit 4 is filled in one bone area and begins to retract into the guide cylinder 304 to transfer to the next bone area, the scraping ring 305 will fully contact the surface of the delivery conduit 4, scraping and intercepting the bone cement adhering to its surface. This cleans the delivery conduit 4 to a certain extent, ensuring its cleanliness. It can prevent the bone cement from adhering and fixing between the delivery conduit 4 and the guide cylinder 304. This can prevent the bone cement from adhering to its surface after the device is removed from the bone, thus avoiding the situation where it cannot be effectively removed from the bone area. This further improves the safety of the operation and ensures the personal safety of the patient to a certain extent.

[0024] Please continue reading. Figures 4 to 6As shown, a squeezing ring 312 is provided on the inner side of the scraping ring 305. A squeezing rod 311 is fixedly connected to one side of the squeezing ring 312. One end of the squeezing rod 311 slides in contact with a push block 310. A rotatable friction roller 309 is provided in the middle position of the push block 310. A friction plate 308 is frictionally connected to the surface of the friction roller 309.

[0025] Please continue reading. Figures 4 to 6 As shown, because the guide tube 304 is tightly fitted to the surface of the delivery catheter 4, the delivery catheter 4 can effectively maintain its bending degree after being delivered and extended from inside the puncture cannula 2, thus accurately filling the patient's bone area with bone cement. Therefore, during the extension of the delivery catheter 4, the friction plate 308 will move synchronously a certain distance inside the guide tube 304. The movement of the friction plate 308 will drive the friction roller 309 to rotate a certain angle inside the guide tube 304. After the guide tube 304 rotates, it will drive the push block 310 to rotate. The rotation of the push block 310 will push the extrusion rod 311 to slide inside the guide tube 304 through the cooperation of the concave and convex surfaces. This will cause the extrusion ring 312 at one end of the extrusion rod 311 to apply extrusion force to the scraping ring 305. After the delivery catheter 4 completes the bone filling work, it retracts into the guide tube 304. During this process, the impurities adhering to the surface of the delivery catheter 4 include not only bone cement but also blood from the patient's own tissue. Due to the mixture of these impurities, the fixed scraping ring 305 alone may not be able to effectively wipe and clean the surface of the delivery catheter 4. Therefore, when the delivery catheter 4 retracts into the guide cylinder 304, the push block 310 rotates and pushes the squeezing ring 312 at one end of the squeezing rod 311 to apply squeezing force to the scraping ring 305. The inner side of the scraping ring 305 becomes more compact due to the compression. Since the scraping ring 305 is made of a high-toughness material, the more compact the scraping ring 305 becomes, the harder it becomes. The scraping ring 305, which is made of a high-toughness material, has a better scraping effect on the surface of the delivery catheter 4 after its hardness is improved, which can fully maintain the cleanliness of its surface.

[0026] Please continue reading. Figures 4 to 6 It should be explained that the friction plate 308 is movably snapped into the bottom of the conveying conduit 4, and the friction plate 308 and the inner arc surface of the guide cylinder 304 have the same angle. The friction roller 309 rotates to drive the extrusion rod 311 and extrusion ring 312 on one side of the push block 310 to apply extrusion force to the scraping ring 305.

[0027] Please continue reading. Figures 4 to 6It should be explained that, since the friction plate 308 and the inner arc surface of the guide cylinder 304 have the same angle, when the conveying conduit 4 slides inside the guide cylinder 304, it drives the friction plate 308 to move synchronously. The movement trajectory of the friction plate 308 is the same as the movement trajectory of the side of the conveying conduit 4 that is in contact with the guide cylinder 304. At this time, the friction roller 309 driven by the friction transmission of the friction plate 308 will rotate inside the guide cylinder 304, thereby driving the push block 310 to rotate and drive the extrusion ring 312 at one end of the extrusion rod 311 to apply extrusion force to the scraping ring 305. This changes the hardness of the scraping ring 305 on the surface of the conveying conduit 4, so that the scraping ring 305 can better clean the surface of the retracted conveying conduit 4 continuously, effectively ensuring the cleanliness of the conveying conduit 4.

[0028] Please see Figures 7 to 10 As shown, the outer side of the scraping ring 305 is movably engaged with an inclined post 313. One side of the inclined post 313 is provided with a compression spring 314 that is movably connected to the rotating sleeve 306. One end of the compression spring 314 is fixedly connected to the puncture sleeve 2.

[0029] Please see Figures 7 to 10 As shown, to further improve the cleaning effect on the surface of the delivery conduit 4, an inclined column 313 is set on one side of the scraping ring 305. When the scraping ring 305 rotates as the rotating sleeve 306 adjusts its pointing position, the rotation of the scraping ring 305 will compress the compression spring 314 inside the rotating sleeve 306 through the inclined column 313. Since the inclined column 313 is movably connected to the scraping ring 305 and is set at an inclination, the inclined column 313 continuously applies a compressive force to the compression spring 314. This causes the scraping ring 305 to be subjected not only to the lateral compressive force from the compression ring 312, but also to the oblique compressive force from the inclined column 313 and the compression spring 314, thereby making the scraping ring... The 305 ring is more compact because as the delivery catheter 4 continuously changes the orientation of filling different parts of the bone, the amount of bone cement adhering to its surface may increase. Although bone cement is highly viscous, it also has a certain degree of fluidity. Therefore, bone cement in the already filled areas may flow to the unfilled areas to some extent. Thus, by changing the compactness of the scraping ring 305 and increasing its hardness, the cleaning effect on the adhering bone cement and blood on the surface of the delivery catheter 4 will be better. This will further improve the cleanliness of the delivery catheter 4 as it contracts into the guide tube 304 and the puncture cannula 2 after continuously changing its orientation, and improve the effect of continuously filling bone areas with bone cement at multiple points.

[0030] Please continue reading. Figures 7 to 10 It should be explained that the compression springs 314 are symmetrically arranged inside the rotating sleeve 306. When the rotating sleeve 306 rotates, it squeezes the compression springs 314 at one end of the inclined column 313 through the scraping ring 305, while the compression springs 314 at the other end are stretched.

[0031] Please continue reading. Figures 7 to 10 It should be explained that, for example, after the delivery conduit 4 completes the filling work in one part of the bone, when it rotates with the rotating sleeve 306 inside the human tissue, the rotation of the scraping ring 305 will drive the inclined column 313 on one side to apply a squeezing force to the compression spring 314 on that side, causing it to contract. Meanwhile, the compression spring 314 at the other end will be stretched by the pulling force of the scraping ring 305. This allows the scraping ring 305 to maintain a balanced state when rotating inside the rotating sleeve 306, thereby improving the cleaning effect of the scraping ring 305 on the surface of the delivery conduit 4. At the same time, it also allows the rotating sleeve 306 to rotate slowly rather than rapidly, since the rotating sleeve 306 is in direct contact with the human body, thus also protecting the human body.

[0032] Please see Figure 1 and Figure 2 As shown, the drive disc 301 is rotatably connected to the puncture cannula handle 1, and the drive sleeve 302 is fitted onto the straight section surface of the delivery conduit 4. The puncture cannula 2, the drive sleeve 302, and the delivery conduit 4 are concentrically arranged.

[0033] Please see Figure 1 and Figure 2 As shown, after the puncture cannula 2 is inserted to the designated position, the delivery catheter 4 can be extended from inside the puncture cannula 2 by controlling the puncture cannula handle 1. This method is existing technology and will not be described in detail here. After the delivery catheter 4 completes a filling operation, the doctor can manually rotate the drive disc 301 inside the puncture cannula handle 1 to drive the drive sleeve 302 to rotate, as shown. Figure 9 As shown, the rotation of the drive sleeve 302 drives the drive ring 303 to rotate, which in turn drives the guide cylinder 304 and the delivery conduit 4 inside it to rotate. This causes the rotating sleeve 306 to rotate inside the puncture cannula 2, adjusting the direction in which the delivery conduit 4 extends from the puncture cannula 2 and the guide cylinder 304. The puncture cannula 2, the delivery conduit 4, and the drive sleeve 302 are arranged concentrically. When the drive sleeve 302 rotates, it drives the guide cylinder 304 and the delivery conduit 4 to rotate. Both the drive sleeve 302 and the delivery conduit 4 will rotate around the axis of the puncture cannula 2, thereby effectively ensuring the stability and accuracy of the direction in which the delivery conduit 4 extends.

[0034] Please see Figure 3 and Figure 4 The upper and lower sides of the rotating sleeve 306 are fixedly connected with a pair of mating rings 307 that are rotatably engaged with the puncture tube 2, and a sealing gasket is provided at the rotating position.

[0035] Please see Figure 3 and Figure 4When the rotating sleeve 306 rotates synchronously with the guide cylinder 304 to adjust the direction of the subsequent delivery extension of the delivery catheter 4, the rotation of the rotating sleeve 306 will drive the upper and lower mating rings 307 to rotate synchronously, thereby forming an effective seal between the mating rings 307 and the puncture cannula 2. On the one hand, this allows the rotating sleeve 306 to rotate more stably in the human tissue, avoiding interference from the tissue that would prevent it from rotating with the delivery catheter 4. On the other hand, it prevents bone cement and blood from entering the interior of the puncture cannula 2, affecting the delivery extension and retraction of the delivery catheter 4, and further improving the stability of the extension and retraction of the guide cylinder 304.

[0036] Please see Figures 5 to 7 As shown, the extrusion ring 312 is made of deformable material, and the pusher block 310 is set in a semi-tooth shape.

[0037] Please see Figures 5 to 7 As shown, the extrusion ring 312 is made of a deformable material. When the extrusion ring 312 is subjected to the extrusion force from the extrusion rod 311, it can apply the extrusion force to the scraping ring 305, increasing the compactness of the scraping ring 305 and making it better scrape the bone cement and other materials on the surface of the delivery conduit 4. However, since the delivery conduit 4 always slides inside the guide cylinder 304 and its position is not fixed, the contact position between the scraping ring 305 and the surface of the delivery conduit 4 will also change continuously. Therefore, the extrusion ring 312 will contact different positions on the surface of the delivery conduit 4 during extension and retraction, thereby stably applying the extrusion force to the scraping ring 305 and thoroughly cleaning the surface of the delivery conduit 4 through the scraping ring 305.

[0038] Please see Figure 1 and Figure 2 As shown, the bone cement delivery section below the delivery catheter 4 is made of deformation memory material, and the surface of the puncture cannula 2 is provided with scale lines.

[0039] Please see Figure 1 and Figure 2 As shown, when the bone cement delivery section below the delivery conduit 4 is inside the guide cylinder 304, the delivery conduit 4 will be in a bent state under the action of its own deformation memory material and the arc bending of the guide cylinder 304, as... Figure 2 As shown, after extending, under the guidance of the arc-shaped bending of the guide tube 304 and its own deformation, it will penetrate into the interior of the bone to perform filling work, as... Figure 10 As shown, the scale lines engraved on the surface of the puncture cannula 2 make it easy for medical staff to observe the depth of the puncture cannula 2 into human tissue, so as to complete the purpose of filling multiple bone cement points with one puncture, thereby protecting the human body.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medical curved delivery structure, comprising a puncture cannula handle (1), a puncture cannula (2), and an injection handle (5), characterized in that, The puncture cannula (2) is provided with a delivery conduit (4) for delivering bone cement, and the puncture cannula (2) is also provided with a delivery drive structure (3) for assisting the delivery conduit (4) to extend out from inside the puncture cannula (2). The delivery drive structure (3) includes a rotatable drive disk (301), a drive sleeve (302) is fixedly connected to the lower part of the drive disk (301), a drive ring (303) is fixedly connected to one end of the drive sleeve (302), a guide cylinder (304) for guiding the delivery of the delivery conduit (4) is fixedly connected to the lower part of the drive ring (303), the delivery section below the delivery conduit (4) is located inside the guide cylinder (304) and fits tightly against it, and a rotating sleeve (306) that is rotatably engaged with the puncture cannula (2) is fixedly connected to the outer side of the guide cylinder (304).

2. The medical curved conveying structure according to claim 1, characterized in that, The guide cylinder (304) is fitted with a scraping ring (305) for cleaning its surface. The scraping ring (305) is fixedly connected to the rotating sleeve (306), and the scraping ring (305) is made of silicone material with high toughness and good sealing performance.

3. The medical curved conveying structure according to claim 2, characterized in that, An extrusion ring (312) is provided on the inner side of the scraping ring (305). An extrusion rod (311) is fixedly connected to one side of the extrusion ring (312). One end of the extrusion rod (311) slides in contact with a push block (310). A rotatable friction roller (309) is provided in the middle position of the push block (310). A friction plate (308) is frictionally connected to the surface of the friction roller (309).

4. A medical curved conveying structure according to claim 3, characterized in that, The friction plate (308) is movably snapped into the bottom of the conveying conduit (4), and the friction plate (308) and the inner arc surface of the guide cylinder (304) have the same angle. The friction roller (309) rotates to drive the extrusion rod (311) and extrusion ring (312) on one side of the push block (310) to apply extrusion force to the scraping ring (305).

5. A medical curved conveying structure according to claim 4, characterized in that, The outer side of the scraping ring (305) is movably engaged with an inclined post (313), and a compression spring (314) is provided on one side of the inclined post (313) and movably connected to the rotating sleeve (306). One end of the compression spring (314) is fixedly connected to the puncture tube (2).

6. A medical curved conveying structure according to claim 5, characterized in that, The compression springs (314) are symmetrically arranged on the inner side of the rotating sleeve (306). The rotating sleeve (306) rotates and squeezes the compression springs (314) at one end of the inclined column (313) through the scraping ring (305), while the compression springs (314) at the other end are stretched.

7. A medical curved conveying structure according to claim 1, characterized in that, The drive disc (301) is rotatably connected to the puncture cannula handle (1), the drive sleeve (302) is sleeved on the straight section surface of the delivery catheter (4), and the puncture cannula (2), drive sleeve (302) and delivery catheter (4) are concentrically arranged.

8. A medical curved conveying structure according to claim 1, characterized in that, The upper and lower sides of the rotating sleeve (306) are fixedly connected with a pair of mating rings (307) that are rotatably engaged with the puncture tube (2), and a sealing gasket is provided at the rotating position.

9. A medical curved conveying structure according to claim 3, characterized in that, The extrusion ring (312) is made of deformable material, and the push block (310) is set in a semi-tooth shape.

10. A medical curved conveying structure according to claim 1, characterized in that, The bone cement delivery section below the delivery conduit (4) is made of deformation memory material, and the surface of the puncture cannula (2) is provided with scale lines.

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