A puncture instrument for spinal navigation surgery

Abstract

A puncture instrument for spinal navigation surgery, comprising a puncture needle and a puncture cannula; further comprising an operating component, which includes a reference frame setting part. The operating component is integrally or combinatorially connected to the puncture needle, and the operating component is combinatorially connected to the puncture cannula. The puncture cannula is combined with the operating component during use and separated from the operating component after use. The positional relationship between the operating component and the puncture needle is locked during use and they are withdrawn from the puncture cannula simultaneously after use. The puncture cannula is provided with a threaded combination head two to be combined with a combination channel two with a threaded hole on the operating component; through this setting, it is ensured that the reference frame set on the operating component is in a locked state with the positional relationship between the operating component and the puncture needle, ensuring that the reference frame and the puncture needle enter and retreat simultaneously, and the effective combination and separation of the puncture cannula and the operating component before and after use can avoid the influence and interference of the reference frame on the puncture cannula, making the entire surgical navigation tracking operation smoother and simpler.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to the field of spinal surgery navigation instruments, and specifically provides a puncture instrument for spinal navigation surgery. Background Art

[0002] Percutaneous vertebroplasty mostly requires the use of a specially combined cannula and puncture needle. The puncture needle extends from the tip of the cannula, and the puncture force of the puncture needle is used to insert the puncture needle and the cannula into the vertebral body through the skin at a specific angle. Then, autologous bone, bone cement, etc. are implanted to complete vertebral body reconstruction.

[0003] However, because it is a percutaneous surgery to the vertebral body, multiple groups of nerves need to be passed through during the process. Once the position is deviated, it will cause irreparable effects to the patient. Therefore, in current clinical practice, in order to ensure the surgical angle, a guide is usually set in advance to guide the entry direction and position of the puncture needle. However, the human skin is soft, and there is still a risk of deviation of the puncture position and angle due to skin movement during the use of the guide.

[0004] With the development of surgical navigation technology, through effective preoperative path planning and intraoperative real-time tracking, doctors can understand the puncture direction and penetration depth in real time through the display structure of the surgical navigation system. However, the problem is that there are a variety of puncture instruments in the prior art, and in order to facilitate operation, the combined position of the puncture needle and the cannula end is set relatively large, resulting in the need to set the reference frame for navigation outside the cannula end when using the existing puncture instruments to complete the navigation surgery. The clamping method is not stable, and it is easy to lose balance. When operating, it is necessary to maintain the balance of the reference frame at any time. When combined with other positions, it is also difficult to adapt to the same reference frame clamping structure due to the variety of puncture instruments.

[0005] The present invention aims at the above technical problems and provides a puncture instrument for spinal navigation surgery. Summary of the Invention

[0006] Aiming at the above technical problems, the present invention hopes to set a puncture instrument specifically for surgical navigation, and the existing clamping structure with a reference frame, in order to maintain stability, mostly clamps to the outside of the cannula. This method requires a special step of removing the reference frame from the cannula before and after navigation, increasing the complexity of the entire operation, and also requires maintaining the balance of the reference frame during the process. If a special puncture instrument is set, this problem needs to be avoided, and a reference frame structure that can be withdrawn together with the puncture needle is set, and the effective separation of the puncture cannula and the puncture needle can be ensured. In this way, it can be ensured that it can be tracked by the surgical navigation system during the puncture process, and after the puncture is successful, the puncture needle and the navigation reference frame can be quickly withdrawn at the same time, leaving only the cannula for implanting bone cement or other substances.

[0007] The present invention discloses a puncture instrument for spinal navigation surgery, which includes

[0008] a puncture needle;

[0009] a puncture cannula;

[0010] an operating component, which includes a reference frame setting part. The operating component is integrally or combinatorially connected to the puncture needle, and the operating component is combinatorially connected to the puncture cannula. The puncture cannula is combined with the operating component during use and separated from the operating component after use. The positional relationship between the operating component and the puncture needle is locked during use, and they are withdrawn from the puncture cannula simultaneously after use.

[0011] Through such a setting, it is ensured that the reference frame set on the operating component is in a locked state with the positional relationship between the operating component and the puncture needle, ensuring that the reference frame and the puncture needle move forward and backward together. Moreover, the effective combination and separation of the puncture cannula and the operating component before and after use can avoid the influence and interference of the reference frame on the puncture cannula, making the entire surgical navigation tracking operation smoother and simpler.

[0012] The following is an embodiment in which the operating component is integrally connected to the puncture needle, specifically including

[0013] a puncture cannula, with a combination head two provided at the tail end;

[0014] an operating component, which includes

[0015] a combination part, which has a combination channel two for combining with the puncture sleeve; the combination channel two is the same as the overall central axis of the combination part, and the combination part two is provided at the second end of the overall operating component; wherein the first end of the operating component is the end far from the tip of the puncture needle during combination, and the second end is the end close to the tip of the puncture needle;

[0016] an operating rod, which extends outward from the outer side wall of the combination part in two directions on a straight line, and a reference frame setting part is provided on the operating rod in one extension direction for setting a reference frame recognized by the navigation system;

[0017] The puncture needle is integrally connected to the operating component, and the puncture needle passes through the combination channel two; the combination head two of the puncture cannula is set into the combination channel two, and under the state without external force, the puncture cannula is stably sleeved outside the puncture needle.

[0018] The following is an embodiment in which the operating component is combinatorially connected to the puncture needle, specifically including

[0019] a puncture needle, with a combination head one provided at the tail end;

[0020] a puncture cannula, with a combination head two provided at the tail end;

[0021] an operating component, which includes

[0022] Combination part 1, which has combination channel 1 for combination with a puncture needle, and also includes a locking structure for locking the positional relationship between combination part 1 and puncture needle 1;

[0023] Combination part 2, which has combination channel 2 for combination with a puncture sleeve; the central axes of combination channel 1 and combination channel 2 are the same. Combination part 1 and combination part 2 are connected, and combination part 1 is arranged at the first end of the overall operating component, and combination part 2 is arranged at the second end of the overall operating component. Combination part 1 and combination part 2 are connected to form a combination part;

[0024] Operating rod, which extends outward from the outer wall of the combination part in two directions on a straight line. A reference frame setting part is arranged on the operating rod in one extension direction for setting a reference frame recognized by the navigation system;

[0025] Combination head 1 of the puncture needle is set into combination channel 1, and the position and angle of the puncture needle in combination part 1 are locked through the locking structure; combination head 2 of the puncture sleeve is set into combination channel 2, and in the state without external force, the puncture sleeve is stably sleeved outside the puncture needle.

[0026] Furthermore, the operating rod extends in two directions perpendicular to the outer wall of the combination part. Through this setting, it is convenient to apply force and rotate during puncture.

[0027] Furthermore, both the operating rod and the combination part are made of hard light alloy materials. Through this setting, the structural stability after each structure is set can be ensured, and it can also avoid the problem of unstable center of gravity during the operation due to the excessive weight of the entire instrument, resulting in damage to the generated operation path.

[0028] Furthermore, the operating rod is arranged in the middle of the combination part, and a soft rubber block is wrapped outside the operating rod and the combination part. Both ends of the soft rubber block are arc-shaped structures to ensure the comfort of the holding operation.

[0029] Furthermore, combination head 2 is a combination head with a threaded section, and combination channel 2 is a threaded hole adapted to the threaded section; in this way, the purpose of combining and separating combination head 2 and combination channel 2 by rotating in different directions can be achieved, ensuring that it can move forward together with the puncture needle and the operating component during use. When separation is required, just separate combination head 2 and combination channel 2. In addition, the threaded section is set in the way of a Luer connector connected to a general syringe to ensure that it can be connected to a suitable injection instrument during bone cement implantation.

[0030] Furthermore, combination head 1 is a non-circular head, and combination channel 1 is a non-circular hole adapted to it. The setting of the non-circular hole can ensure that when applying force and rotating into the surgical position after combination, the puncture needle will not rotate due to the forward rotation force, thus avoiding the problem of tracking error.

[0031] Further, the combined head 1 enters the combined channel 1 after passing through the combined channel 2 to complete the combination. This setting ensures that both the puncture cannula and the puncture needle are combined from below through the combined channel 2, providing space for the locking structure.

[0032] Further, the locking structure includes: a threaded locking hole on the combined head 1, a threaded locking nail, and a locking plate on the combined part. A through hole for the threaded locking nail to pass through is provided on the locking plate, and a nail cap is provided on the threaded locking nail. The outer diameter of the nail cap is larger than the outer diameter of the through hole. During use, first, the combined head 1 enters the combined channel 1 after passing through the combined channel 2 to complete the first step of combination. Then, the locking nail passes through the through hole, and then is combined with the threaded locking nail through the threaded locking hole. By continuously rotating the threaded locking nail until the nail cap is in close contact with the locking plate, the positional relationship between the combined head 1 and the combined channel 1 is locked.

[0033] The present invention also discloses a puncture needle for a puncture instrument, which includes a combined head 1 and a needle body part. The cross-section of the combined head 1 is non-circular; a threaded locking hole is provided inside the combined head 1.

[0034] The present invention also discloses a puncture cannula for a puncture instrument, which includes a combined head 2 and a tube body part. The combined head 2 is a threaded combination hole.

[0035] The present invention also discloses an operating component for a puncture instrument, which includes

[0036] Combined part 1, which has a combined channel 1 for combining with the puncture needle, and also includes a locking structure for locking the positional relationship between the combined part 1 and the puncture needle 1;

[0037] Combined part 2, which has a combined channel 2 for combining with the puncture sleeve; the central axes of the combined channel 1 and the combined channel 2 are the same. The combined part 1 and the combined part 2 are connected, and the combined part 1 is arranged at the first end of the overall operating component, and the combined part 2 is arranged at the second end of the overall operating component. The combined part 1 and the combined part 2 are connected to form a combined part;

[0038] An operating rod, which extends outward from the outer side wall of the combined part in two directions on a straight line. A reference frame setting part is provided on the operating rod in one extension direction for setting a reference frame recognized by the navigation system.

[0039] Technical effects

[0040] When the positional relationship between the reference frame and the puncture needle is a locking relationship, it can ensure that the reference frame and the puncture needle are sent to the surgical position under the guidance of the navigation system while the puncture cannula and the puncture needle are sent in a visible condition. After the operation, the reference frame is removed with the puncture needle, and the puncture cannula is separated after combination before use, and the reference frame will not interfere with it. The entire operation process does not require special attention to the setting and placement of the reference frame. In addition, due to the positional locking relationship between the puncture needle and the operating component during use, the operator holds the operating component to perform the operation throughout the process, without worrying about problems caused by unstable center of gravity. Moreover, the reference frame moves with the puncture needle, and the reference sleeve will be stably set in the appropriate position without being interfered by other structures after implantation.

[0041] By setting the locking method of the combination relationship between the puncture needle and the operating component, it can achieve the effect that only by replacing the puncture needle and the puncture cannula according to different patients, it can be used among different patients. In addition, even for non-disposable puncture needles, because the tip of the needle will be worn during use and thus cannot meet the purpose of quickly and effectively entering, the problem of replacing the worn puncture needle can be solved by the combination and replaceable method.

[0042] By correspondingly setting the combination head one and the combination channel one as non-circular structures and combining with the locking nail arranged above, it can very well achieve locking the combination head one in the combination channel without moving up and down and relative rotation, and there is also the abutment of the combination head two on the combination head one to achieve the best position locking effect, thereby making the positional relationship between the reference frame and the puncture needle tip fixed, and ensuring to the greatest extent that the surgical navigation system completes the tracking of the puncture needle by tracking the reference frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Structural schematic diagram of the puncture instrument with a reference frame set in the present invention;

[0044] Figure 2 Structural schematic diagram of the puncture instrument without a reference frame set in the present invention;

[0045] Figure 3 Longitudinal sectional structural schematic diagram of the position of the operating component after combination of the puncture instrument in the implementation manner where the puncture needle and the operating component are integrally connected in the present invention;

[0046] Figure 4 Longitudinal sectional structural schematic diagram of the position of the operating component after combination of the puncture instrument in the implementation manner where the puncture needle and the operating component are combined in the present invention;

[0047] Figure 5 Structural schematic diagram of the operating component without a soft rubber block but with a reference frame set in the implementation manner where the puncture needle and the operating component are combined in the present invention;

[0048] Figure 6 Schematic longitudinal sectional structure diagram of the operating component without a soft rubber block and without a reference frame in the embodiment of the combination of the puncture needle and the operating component of the present invention;

[0049] Figure 7 Schematic transverse sectional structure diagram of a part of the combination channel in the embodiment of the combination of the puncture needle and the operating component of the present invention;

[0050] Figure 8 Schematic structure diagram of the socket connection between the puncture needle and the puncture cannula in the embodiment of the combination of the puncture needle and the operating component of the present invention;

[0051] Figure 9 Schematic structure diagram of the puncture cannula of the present invention;

[0052] Figure 10 Schematic structure diagram of the puncture needle in the embodiment of the combination of the puncture needle and the operating component of the present invention;

[0053] Figure 11 Schematic structure diagram of the soft rubber block of the present invention;

[0054] Description of main reference numerals

[0055] 1. Puncture needle; 11. First combination head; 111. Arc segment; 112. Straight segment; 2. Puncture cannula; 21. Second combination head; 22. Oval operating structure; 3. Combination part; 31. First combination channel; 32. Second combination channel; 4. Operating rod; 41. Reference frame setting part; 42. Soft rubber block; 51. Threaded locking hole; 52. Threaded locking nail; 521. Nail cap; 53. Locking plate; 531. Through hole; 54. Accommodating hole. Detailed implementation manners

[0056] Example 1

[0057] Reference Figures 1-3 , 9 and 11; A puncture instrument for spinal navigation surgery, which includes a puncture needle 1 and a puncture cannula 2; It also includes an operating component, including a reference frame setting part. The operating component is integrally or combinatorially connected to the puncture needle 1, the operating component is combinatorially connected to the puncture cannula 2. The puncture cannula 2 is combined on the operating component during use and separated from the operating component after use. The positional relationship between the operating component and the puncture needle 1 is locked during use and they are simultaneously withdrawn from the puncture cannula 2 after use. Among them, the operating component is integrally connected to the puncture needle 1. The specific implementation manner is that a second combination head 21 is provided at the tail end of the puncture cannula 2;

[0058] An operating component, which includes a combination part 3, and within the combination part 3 there is a second combination channel 32 for combining with a puncture sleeve; the second combination channel 32 is the same as the overall central axis of the combination part 3, and the second part of the combination part 3 is arranged at the second end of the overall operating component; wherein the first end of the operating component is the end far from the tip of the puncture needle 1 during combination, and the second end is the end close to the tip of the puncture needle 1.

[0059] An operating rod 4, which extends outward from the outer side wall of the combination part 3 in two directions on a straight line, and on the operating rod 4 in one extension direction, there is a reference frame setting part 41 for setting a reference frame recognized by the navigation system;

[0060] The puncture needle 1 is integrally connected to the operating component, and the puncture needle 1 passes through the second combination channel 32; the second combination head 21 of the puncture sleeve 2 is arranged into the second combination channel 32, and in the state without external force, the puncture sleeve 2 is stably sleeved outside the puncture needle 1.

[0061] A more preferred embodiment is that the operating rod 4 extends in two directions perpendicular to the outer side wall of the combination part 3. Through this setting, it is convenient to apply force and perform rotational operations during puncture.

[0062] A more preferred embodiment is that both the operating rod 4 and the combination part 3 are made of hard light alloy materials. Through this setting, the structural stability after each structure is set can be ensured, and at the same time, it can be avoided that due to the excessive weight of the entire instrument, the center of gravity is unstable during the operation process, resulting in damage to the generated operation path.

[0063] A more preferred embodiment is that the operating rod 4 is arranged in the middle of the combination part 3, and a soft rubber block 42 is wrapped outside the operating rod 4 and the combination part 3. Both ends of the soft rubber block 42 are arc-shaped structures to ensure the comfort of the holding operation.

[0064] A more preferred embodiment is that the soft rubber block 42 wraps both the combination part 3 and the operating rod 4 inside it, leaving holes allowing the puncture sleeve 2 to pass through and holes allowing the operating rod 4 on one side of the reference frame setting part 41 to extend out.

[0065] A more preferred embodiment is that the soft rubber block 42 is symmetrically arranged with respect to the longitudinal axis of the combination part 3, and the edges of the soft rubber block 42 are all rounded.

[0066] A more preferred embodiment is that the combination head II 21 is a combination head with a threaded section, and the combination channel II 32 is a threaded hole adapted to the threaded section; in this way, the combination head II 21 and the combination channel II 32 can be combined and separated by rotating in different directions, ensuring that it can move forward together with the puncture needle 1 and the operating component during use. When separation is required, only the combination head II 21 and the combination channel II 32 need to be separated. In addition, the threaded section is arranged in the way of a Luer connector connected to a general syringe, ensuring that a suitable injection instrument can be connected during bone cement implantation.

[0067] A more preferred embodiment is that an operating structure is arranged on the puncture cannula 2, specifically an oval operating structure 22. The oval operating structure 22 is arranged close to the combination head II 21. This arrangement can very conveniently rotate the puncture cannula 2 to achieve rapid and effective combination during use and separation after use.

[0068] During use, the reference frame is set to the reference frame setting part, and the combination head II 21 of the puncture cannula 2 and the combination channel II 32 are rotationally combined. Under the guiding action of the navigation system, the operator holds the operating rod 4 to guide the puncture needle 1 into a suitable position. Then, by controlling the relative rotation of the oval platform and the operating component, the combination head II 21 of the puncture cannula 2 and the combination channel II 32 are separated. Then, the puncture needle 1 and the operating component with the reference frame fixed together are separated from the puncture cannula 2, and only the puncture cannula 2 is left in the punctured position for subsequent implantation of bone cement and other substances. Later, the injection structure can be combined with the combination head II 21 to complete the subsequent implantation of substances.

[0069] Since the positional relationship between the reference frame and the puncture needle 1 is a locking relationship, it can be ensured that the reference frame, together with the puncture needle 1, is guided by the navigation system to send the puncture cannula 2 and the puncture needle 1 into the surgical position under visible conditions and then removed together with the puncture needle 1 after the operation. The entire operation process does not require special attention to the setting and taking - placing issues of the reference frame. In addition, due to the positional locking relationship between the puncture needle 1 and the operating component during use, the operator holds the operating component throughout the process, without worrying about problems caused by unstable center of gravity. Moreover, the reference frame moves with the puncture needle 1, and the reference sleeve will be stably set in a suitable position after implantation without being interfered by other structures.

[0070] Embodiment 2

[0071] Reference Figures 1-2; 4-11; A puncture instrument for spinal navigation surgery, which includes a puncture needle 1 and a puncture cannula 2; it also includes an operating component, which includes a reference frame setting part. The operating component is integrally or combinatorially connected to the puncture needle 1, and the operating component is combinatorially connected to the puncture cannula 2. The puncture cannula 2 is combined with the operating component during use and separated from the operating component after use. The positional relationship between the operating component and the puncture needle 1 is locked during use and they are withdrawn from the puncture cannula 2 simultaneously after use.

[0072] Reference Figures 3-6 , specifically an implementation scheme of the combination of the operating component and the puncture needle 1. A combination head one 11 is arranged at the tail end of the puncture needle 1; a combination head two 21 is arranged at the tail end of the puncture cannula 2; it also includes an operating component, which includes a combination part 3. The combination part 3 includes a combination part 3 one, which has a combination channel one 31 for combining with the puncture needle 1, and also includes a locking structure for locking the combination part 3 one in a positional relationship with the puncture needle 1; it also includes a combination part 3 two, which has a combination channel two 32 for combining with the puncture sleeve; the central axes of the combination channel one 31 and the combination channel two 32 are the same. The combination part 3 one is connected to the combination part 3 two, and the combination part 3 one is arranged at the first end of the overall operating component, and the combination part 3 two is arranged at the second end of the overall operating component. Among them, the first end of the operating component is the end far from the tip of the puncture needle 1 during combination, and the second end is the end close to the tip of the puncture needle 1;

[0073] The operating component also includes an operating rod 4. The operating rod 4 extends outward in two directions in a straight line from the outer wall of the combination part 3. A reference frame setting part 41 is arranged on the operating rod 4 in one extension direction for setting a reference frame recognized by the navigation system;

[0074] The combination head one 11 of the puncture needle 1 is set into the combination channel one 31, and the puncture needle 1 is locked in position and angle with the combination part 3 one through the locking structure; the combination head two 21 of the puncture cannula 2 is set into the combination channel two 32, and in the state without external force, the puncture cannula 2 is stably sleeved outside the puncture needle 1.

[0075] Through this kind of setting, it is ensured that the reference frame set on the operating component and the positional relationships between the operating component and the puncture needle 1 are all in a locked state, ensuring that the reference frame and the puncture needle 1 move forward and backward together, and the effective combination and separation of the puncture cannula 2 and the operating component before and after use can avoid the influence and interference on the puncture cannula 2 caused by the setting of the reference frame, making the entire surgical navigation tracking operation smoother and simpler.

[0076] A more preferred implementation method is that the operating rod 4 extends in two directions perpendicular to the outer wall of the combination part 3. Through this kind of setting, it is convenient to apply force and rotate during puncture.

[0077] In a more preferred embodiment, both the operating rod 4 and the combination part 3 are made of a hard light alloy material. This setting can ensure the structural stability of each structure and avoid the center of gravity instability during operation due to the excessive weight of the entire instrument, which may damage the generated operation path.

[0078] In a more preferred embodiment, the operating rod 4 is disposed in the middle of the combination part 3, and a soft rubber block 42 is wrapped around the outer sides of the operating rod 4 and the combination part 3. Both ends of the soft rubber block 42 are arc-shaped structures to ensure the comfort of the grasping operation.

[0079] In a more preferred embodiment, the soft rubber block 42 wraps both the combination part 3 and the operating rod 4 inside, leaving holes allowing the puncture cannula 2 to pass through and holes allowing the operating rod 4 on one side of the reference frame setting part 41 to extend out.

[0080] In a more preferred embodiment, the soft rubber block 42 is symmetrically arranged with respect to the longitudinal axis of the combination part 3, and the edges of the soft rubber block 42 are rounded.

[0081] In a more preferred embodiment, the combination head two 21 is a combination head with a threaded section, and the combination channel two 32 is a threaded hole adapted to the threaded section; in this way, the combination head two 21 and the combination channel two 32 can be combined and separated by rotating in different directions, ensuring that it can move forward together with the puncture needle 1 and the operating component during use, and when separation is required, only the combination head two 21 and the combination channel two 32 need to be separated. In addition, the threaded section is set in the form of a Luer connector for connecting to a general syringe, ensuring that it can be connected to a suitable injection instrument during bone cement implantation.

[0082] In a more preferred embodiment, an oval operating structure 22 is provided on the puncture cannula 2, and the oval operating structure 22 is disposed close to the combination head two 21. This setting can very conveniently rotate the puncture cannula 2 to achieve rapid and effective combination during use and separation after use.

[0083] In a more preferred embodiment, reference Figure 8 and 10; The combined head 11 is a non-circular head, and the combined channel 31 is a non-circular hole adapted thereto. The non-circular hole is arranged to ensure that when the combination is applied with a rotational force to enter the surgical position, the puncture needle 1 will not rotate due to the rotational force in the front, thus avoiding the problem of tracking error; in a more preferred embodiment, the cross-section of the non-circular head includes one or more arc segments 111 with the same center and one or more straight segments 112 connecting the arcs. In the combined state, the center of the arc segment 111 is arranged on the central axis of the combined channel 32. Because of the circular combined head 21, the arrangement of the arc segment 111 makes it easier to arrange the combined channel 31 and the combined channel 32, and can ensure the arrangement of the puncture needle 1 and the puncture cannula 2 arranged in a sleeved manner.

[0084] In a more preferred embodiment, the combined head 11 enters into the combined channel 31 through the combined channel 32 to complete the combination. This arrangement ensures that both the puncture cannula 2 and the puncture needle 1 are combined from below through the combined channel 32, providing space for the locking structure.

[0085] In a more preferred embodiment, refer to Figure 4 and Figure 6 ; The locking structure includes: a threaded locking hole 51 on the combined head 11, a threaded locking nail 52, and a locking plate 53 on the combined part 3. A through hole 531 for the threaded locking nail 52 to pass through is arranged on the locking plate 53. A nail cap 521 is arranged on the threaded locking nail 52, and the outer diameter of the nail cap 521 is larger than the outer diameter of the through hole 531; during use, first pass the combined head 11 through the combined channel 32 and then into the combined channel 31 to complete the first step of combination. Then pass the locking nail through the through hole 531, and then combine it with the threaded locking nail 52 through the threaded locking hole. By continuously rotating the threaded locking nail 52 until the nail cap 521 is in close contact with the locking plate 53, the positional relationship between the combined head 11 and the combined channel 31 is locked.

[0086] In a more preferred embodiment, in the combined state, the combined head 21 abuts against the combined head 11 to further stabilize the position of the combined head 11.

[0087] In a more preferred embodiment, an accommodation hole 54 for accommodating the nail cap 521 is further arranged in the combined part 3. This arrangement can avoid the inconvenience and unnecessary harm brought to the operator by the nail cap 521 during operation.

[0088] During use, the reference frame is set to the reference frame setting part. The combined head one 11 of the puncture needle 1 enters the combined channel one 31 through the combined channel two 32 and is combined therein. Then, the position of the puncture needle 1 and the combined channel one 31 is locked by using the threaded locking pin 52. Next, the combined head two 21 of the puncture cannula 2 is rotationally set into the combined channel two 32. The puncture needle 1 and the puncture cannula 2 are combined with the operating component. Under the guiding action of the navigation system, the hand holds the operating rod 4 to guide the puncture needle 1 into a suitable position. Then, by controlling the relative rotation of the elliptical platform and the operating component, the combined head two 21 of the puncture cannula 2 is separated from the combined channel two 32. Subsequently, the puncture needle 1 fixed together with the operating component with the reference frame is separated from the puncture cannula 2, and only the puncture cannula 2 remains at the punctured position for subsequent implantation of bone cement and other substances. Later, the injection structure can be combined with the combined head two 21 to complete the subsequent implantation of substances.

[0089] By setting the puncture needle 1 and the operating component in a combined locking relationship, it can achieve the effect that only by replacing the puncture needle 1 and the puncture cannula 2 according to different patients can it be used among different patients. In addition, even if the puncture needle 1 is not for single use, because the tip of the needle will also be worn during use and thus cannot meet the purpose of quickly and effectively entering, the problem of replacing the worn puncture needle 1 can be solved by the combined replaceable method.

[0090] By correspondingly setting the combined head one 11 and the combined channel one 31 as non-circular structures and combining with the locking pin arranged above, it can very well achieve locking the combined head one 11 in the combined channel without vertical movement and relative rotation, and there is also the abutment of the combined head two 21 on the combined head one 11 to achieve the best position locking effect, thereby fixing the positional relationship between the reference frame and the tip of the puncture needle 1 and ensuring to the greatest extent that the surgical navigation system completes the tracking of the puncture needle 1 by tracking the reference frame.

[0091] The technical solutions in the embodiments of the present invention are clearly and completely described above through specific specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Without conflict, the above embodiments and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

Claims

1. A puncture instrument for spinal navigation surgery, characterized in that it includes a puncture needle with a combined head one provided at the tail end; a puncture cannula with a combined head two provided at the tail end; an operating component, including a reference frame setting part for setting a reference frame recognized by the navigation system; the operating component is combined and connected with the puncture needle, and the positional relationship between the operating component and the puncture needle is locked during use and withdrawn from the puncture cannula simultaneously after use; the operating component is combined and connected with the puncture cannula, and the puncture cannula is combined with the operating component during use and separated from the operating component after use; The operating component also includes a combined part one, which has a combined channel one for combining with the puncture needle and also includes a locking structure for locking the positional relationship between the combined part one and the puncture needle; a combined part two, which has a combined channel two for combining with the puncture sleeve; the first end of the operating component is the end far from the tip of the puncture needle during combination, and the second end is the end close to the tip of the puncture needle; the central axes of the combined channel one and the combined channel two are the same, the combined part one and the combined part two are connected, and the combined part one is arranged at the first end of the whole operating component, and the combined part two is arranged at the second end of the whole operating component, and the combined part one and the combined part two are connected into a combined part; the combined head one is a non-circular head, and the combined channel one is a non-circular hole adapted to the combined head one; the combined head two is a combined head with a threaded section, and the combined channel two is a threaded hole adapted to the threaded section; the locking structure includes: a threaded locking hole on the combined head one, a threaded locking nail, and a locking plate on the combined part; The locking plate is provided with a through hole for the threaded locking nail to pass through, and the threaded locking nail is provided with a nail cap, the outer diameter of the nail cap is larger than the outer diameter of the through hole, and after the nail cap is in close contact with the locking plate, the positional relationship between the combined head one and the combined channel one is locked; in the combined state, the combined head two abuts against the combined head one; an operating rod, which extends outward from the outer side wall of the combined part in two directions on a straight line, and the operating rod is perpendicular to the outer side wall of the combined part; a reference frame setting part is arranged on the operating rod in one extending direction; Both the operating rod and the combined part are made of a hard and light alloy material.

2. The puncture device according to claim 1, characterized in that, The operating rod is arranged in the middle of the combined part, and a soft rubber block is wrapped around the operating rod and the outer side of the combined part, and both ends of the soft rubber block are arc-shaped structures.

3. The puncture device according to claim 2, wherein, The soft rubber block wraps both the combined part and the operating rod inside it, leaving a hole allowing the puncture cannula to pass through and a hole allowing the operating rod on the side with the reference frame setting part to extend out.

4. The puncture device according to claim 2, wherein, The soft rubber block is symmetrically arranged with the longitudinal axis of the combined part as the axis of symmetry, and the edges of the soft rubber block are all rounded.

5. The puncture device according to claim 1, characterized in that, An elliptical operating structure is arranged on the puncture cannula, and the elliptical operating structure is arranged close to the combined head two.

6. The puncture device according to claim 1, characterized in that, The cross-section of the non-circular head includes one or more arc segments with the same center and one or more straight segments connecting the arc segments. In the combined state, the center of the arc segment is arranged on the central axis of the combined channel two; the combined head one enters the combined channel one after passing through the combined channel two to complete the combination.

7. The puncture instrument according to claim 6, wherein, A receiving hole for receiving the nail cap is also arranged inside the combined part.

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