Opening awl for spine surgery
By introducing a limit sleeve and limit structure into the open cone for spinal surgery, it is possible to automatically prevent deep penetration after the cone head reaches its maximum depth, and solve the problem of excessive depth of nail path caused by unstable operation in the prior art , improves the safety of the surgery.
Patent Information
- Application Number
- CN202420319687.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-02-21
AI Technical Summary
In spinal surgery, existing open cones cannot effectively prevent the doctor from having too deep nails due to instability in operation, which poses a risk of injuring the patient.
An open cone for spinal surgery is designed, which automatically prevents further in-depth after the cone head is penetrated into a certain depth through the limit sleeve and limit structure, avoiding excessive depth due to operational problems. The limit sleeve of the open cone is elastically connected along the axial direction of the tapered head, and slides through the handle direction. A limiting limit structure is arranged between the limit sleeve and the tapered head, including steps and springs, ensuring that the tapered head reaches the maximum depth after reaching the maximum depth. Can't go further.
It effectively prevents the case of too deep open cortex. The self-structure of the open cone limits the depth distance of the cone head, avoids too deep due to operational problems, and improves the safety of the surgery.
Smart Images
Figure CN222265336U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of spinal surgical instruments, and more specifically, to an open-circuit cone for spinal surgical operations. Background Art
[0002] In clinical spinal surgery, pedicle screws are widely used. At present, open cones are often used in clinical practice to prepare the screw channels for pedicle screws. The open cone is made of a relatively hard metal and has no feedback on the hardness of the object being drilled. Therefore, doctors can only rely on their own experience to determine the depth of the drilling. Such an operation method has a huge risk that when the open cone drills too deep, the cone head is likely to damage the patient's nerves.
[0003] The Chinese utility model patent with publication number CN211883992U (publication date: 2020.11.10) discloses a pedicle opener for spinal surgery, which uses a spring to realize that the inner rod is telescopically connected to the outer sleeve, and a ruler is set on the inner rod. A display window is opened on the outer sleeve, and the display window is marked with scale lines. When in use, the doctor judges the depth of the nail channel according to the scale lines on the open cone. However, this method only provides visual feedback through scale information, and still requires the doctor's active operation to control the maximum depth of the nail channel. If the hand is unstable during operation, it is still possible to continue to go deeper into the open cone and cause damage to the patient. Summary of the invention
[0004] The utility model provides an open-path cone for spinal surgery. When the cone head penetrates to the maximum depth, the cone head can be prevented from further penetration through its own structural characteristics instead of limiting the depth through the doctor's operation, thus avoiding the situation where the nail channel depth is too deep due to operational problems.
[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an open-circuit cone for spinal surgery, comprising a cone rod, the head end of the cone rod has a cone head, and the tail end of the cone rod is provided with a handle;
[0006] A limiting sleeve is provided on the outer side of the cone head, and the limiting sleeve is elastically connected along the axial direction of the cone head; the limiting sleeve moves toward the handle to increase the distance that the cone head extends out of the limiting sleeve; a limiting structure is provided between the limiting sleeve and the cone head to limit the moving distance of the limiting sleeve.
[0007] Optionally, the outer side wall of the cone head is provided with a first step toward the tip thereof, the inner side wall of the limiting sleeve is provided with a second step, and a spring is clamped between the first step and the second step.
[0008] Optionally, the limiting structure includes a third step disposed on the cone head and facing the tip of the cone head, the third step is located on a side of the limiting sleeve facing the handle, and the limiting sleeve movably abuts against the third step.
[0009] Optionally, the limiting structure includes a limiting bar hole opened on the side wall of the cone head and a limiting pin passing through the side wall of the limiting sleeve, the limiting bar hole extends along the axial direction of the cone head, and the limiting pin passes through the limiting bar hole.
[0010] Optionally, an observation window is provided on the side wall of the limiting sleeve, and the observation window is movably aligned to the limiting bar hole.
[0011] Optionally, a connecting pin is further included, a connecting hole is provided at the end of the handle facing the conical rod, a connecting column inserted into the connecting hole is provided at the end of the conical rod facing the handle, and the connecting pin passes through the side wall of the connecting hole and the connecting column.
[0012] Optionally, an outer side wall of the handle is provided with an anti-slip cover.
[0013] The technical solution of this application has the following beneficial effects compared with the prior art:
[0014] When in use, hold the handle and extend the tip of the limiting sleeve through the cone head to perform the cortical opening operation. When the end of the limiting sleeve toward the tip of the cone head contacts the anterior cervical plate, it will be blocked by the screw hole, and the cone head will continue to go deeper, causing the limiting sleeve to slide toward the handle. When the cone head goes deep to a certain depth, due to the limitation of the limiting structure, the limiting sleeve can no longer continue to slide along the cone head, and the cone head can no longer go deeper, thereby effectively preventing the cortical opening from being too deep. The solution of the present application limits the penetration distance of the cone head through the structure of the opening cone itself, rather than controlling the penetration distance through the doctor's operation, effectively avoiding the occurrence of excessive penetration due to operational problems. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0016] Figure 1 This is a state diagram of an open-circuit cone for spinal surgery when the cone head has not penetrated into the human body;
[0017] Figure 2 A schematic diagram of the internal structure of the cone head of an open-path cone for spinal surgery when the cone head has not penetrated into the human body;
[0018] Figure 3 for Figure 2 A partial enlarged view of the middle part;
[0019] Figure 4 This is a diagram showing the open-circuit cone used in spinal surgery when the cone head penetrates deep into the human body;
[0020] Figure 5 A schematic diagram of the internal structure of the cone head of an open-path cone used in spinal surgery when the cone head penetrates into the human body;
[0021] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;
[0022] Figure 7 Exploded view of the open cone structure for spinal surgery;
[0023] Figure 8 A schematic diagram of the internal structure of the cone head of the second type of open-circuit cone for spinal surgery;
[0024] Fig. 9 This is a schematic diagram of the internal structure of the cone head of the third type of open-circuit cone used in spinal surgery.
[0025] Icons: 1. Cone rod; 2. Cone head; 3. Handle; 4. Limit sleeve; 5. First step; 6. Second step; 7. Spring; 8. Third step; 9. Limit bar hole; 10. Limit pin; 11. Observation window; 12. Connecting pin; 13. Connecting hole; 14. Connecting column; 15. Anti-slip sleeve. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] It should be noted that when an element is referred to as being "fixed" or "set" to another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.
[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0029] Embodiment 1:
[0030] This embodiment provides an open-path cone for spinal surgery, based on Figure 1 and Figure 4As shown, it includes a cone rod 1, the head end of the cone rod 1 has a cone head 2, and the tail end of the cone rod 1 is provided with a handle 3. The doctor holds the handle 3 and performs the cortical opening operation through the tip of the cone head 2. On the basis of the above structure, the outer side of the cone head 2 is provided with a limiting sleeve 4, and the limiting sleeve 4 is elastically connected along the axial direction of the cone head 2. The limiting sleeve 4 moves toward the handle 3 to increase the distance that the cone head 2 extends from the limiting sleeve 4. A limiting structure is provided between the limiting sleeve 4 and the cone head 2 to limit the movable distance of the limiting sleeve 4.
[0031] When the cone head 2 has not yet penetrated into the human body, based on Figures 1 to 3 As shown, the limiting sleeve 4 is located at the tip of the cone head 2 by default. At this time, the tip of the cone head 2 can be completely located inside the limiting sleeve 4, or it can be slightly exposed from the limiting sleeve 4. The doctor holds the handle 3 and extends the tip of the limiting sleeve 4 through the cone head 2 to perform the cortical opening operation. Figures 4 to 6 As shown, when the end of the limiting sleeve 4 toward the tip of the cone head 2 contacts the anterior cervical vertebrae steel plate, it will be blocked by the screw hole, and the cone head 2 will continue to go deeper, the distance that the cone head 2 extends out of the limiting sleeve 4 increases, and the limiting sleeve 4 slides toward the handle 3. When the cone head 2 goes deep to a certain depth, due to the limitation of the limiting structure, the limiting sleeve 4 can no longer continue to slide along the cone head 2, and the cone head 2 can no longer go deeper, thereby effectively preventing the cortex from being opened too deeply. The solution of the present application limits the penetration distance of the cone head 2 through the structure of the opening cone itself, rather than controlling the penetration distance through the doctor's operation, effectively avoiding the situation where the cone head 2 goes too deep due to operational problems.
[0032] based on Figure 3 and Figure 6 As shown, the outer wall of the cone head 2 is provided with a first step 5 toward its tip, the inner wall of the limiting sleeve 4 is provided with a second step 6, a spring 7 is sandwiched between the first step 5 and the second step 6, and the spring 7 is sleeved on the outer side of the cone head 2. When the limiting sleeve 4 slides toward the handle 3, the spring 7 is compressed. When the cone head 2 is removed from the human body, under the elastic action of the spring 7, the cone head 2 retracts to the limiting sleeve 4, realizing the elastic and movable connection between the limiting sleeve 4 and the cone head 2.
[0033] In this embodiment, based on Figure 3 and Figure 6 As shown, the limiting structure includes a third step 8 disposed on the cone head 2 and facing the tip of the cone head 2. The third step 8 is located on the side of the limiting sleeve 4 facing the handle 3. The limiting sleeve 4 movably abuts against the third step 8. When the cone head 2 penetrates the human body to the maximum depth, based on Figure 6As shown, the limiting sleeve 4 abuts against the third step 8, and the limiting sleeve 4 can limit the cone head 2 from continuing to penetrate into the human body, directly limiting the penetration distance of the cone head 2 from a structural point of view, and avoiding the cone head 2 from penetrating too deep due to operational problems. At the same time, the limiting structure also includes a limiting bar hole 9 opened on the side wall of the cone head 2 and a limiting pin 10 penetrated through the side wall of the limiting sleeve 4. The limiting bar hole 9 extends along the axial direction of the cone head 2, and the limiting pin 10 penetrates through the limiting bar hole 9. When the limiting sleeve 4 slides along the cone head 2, the limiting pin 10 slides along the limiting bar hole 9. When the cone head 2 has not yet penetrated into the body, based on Figure 3 As shown, under the elastic action of the spring 7, the limiting pin 10 abuts against the end of the limiting strip hole 9 close to the tip of the cone head 2 to prevent the limiting sleeve 4 from sliding off the cone head 2. That is, in the above structure, the third step 8 is used to limit the limiting sleeve 4 from sliding to the position farthest from the tip of the cone head 2, and the limiting pin 10 and the limiting strip hole 9 are used to limit the position of the limiting sleeve 4 in the non-use state.
[0034] The limiting structure of the third step 8, the limiting strip hole 9 and the limiting pin 10 is also convenient for the assembly of the product. During assembly, the spring 7 is placed in the limiting sleeve 4, the limiting sleeve 4 is sleeved on the cone head 2, and finally the limiting pin 10 is passed through the side wall of the limiting sleeve 4 and the limiting strip hole 9.
[0035] Further, based on Figure 6 and Figure 7 As shown, the side wall of the limiting sleeve 4 is provided with an observation window 11, which is movable and aligned to the limiting strip hole 9. When in use, the distance that the limiting strip hole 9 extends into the observation window 11 can be observed to judge the length of the tip of the cone head 2 extending out of the limiting sleeve 4. Of course, it can also be judged by observing the position of the first step 5 or the spring 7.
[0036] Further, based on Figure 7 As shown, the handle 3 further includes a connecting pin 12, a connecting hole 13 is provided at the end of the handle 3 facing the tapered rod 1, a connecting column 14 is provided at the end of the tapered rod 1 facing the handle 3, and the connecting pin 12 is inserted into the side wall of the connecting hole 13 and the connecting column 14 to achieve the connection between the tapered rod 1 and the handle 3. At the same time, the outer wall of the handle 3 is covered with an anti-slip cover 15. The anti-slip cover 15 can be made of rubber or a hard material with anti-slip patterns on the surface to reduce the slipping of the hand.
[0037] Embodiment 2:
[0038] This embodiment provides an open-circuit cone for spinal surgery, which differs from the first embodiment in that the limiting structure is different. Figure 8As shown, the limiting structure only has a limiting bar hole 9 opened on the side wall of the cone head 2 and a limiting pin 10 penetrated through the side wall of the limiting sleeve 4, but no third step 8. The limiting bar hole 9 extends along the axial direction of the cone head 2, and the limiting pin 10 penetrates through the limiting bar hole 9. At this time, when the depth of the cone head 2 penetrating into the human body reaches the maximum, the limiting pin 10 abuts against the end of the limiting bar hole 9 away from the tip of the cone head 2 to prevent the tip of the cone head 2 from continuing to extend, and can also limit the length of the cone head 2 penetrating into the human body. When the cone head 2 has not yet penetrated into the body, under the elastic action of the spring 7, the limiting pin 10 abuts against the end of the limiting bar hole 9 close to the tip of the cone head 2 to prevent the limiting sleeve 4 from slipping off the cone head 2.
[0039] Embodiment 3:
[0040] This embodiment provides an open-circuit cone for spinal surgery, which differs from the first embodiment in that the limiting structure is different. Figure 8 As shown, the limiting structure only has the third step 8, but there is no limiting strip hole 9 provided on the side wall of the cone head 2 and the limiting pin 10 provided on the side wall of the limiting sleeve 4. At this time, it should be noted that the two ends of the spring 7 need to be fixedly connected to the first step 5 and the second step 6 respectively. When the depth of the cone head 2 penetrating into the human body reaches the maximum, the limiting sleeve 4 abuts against the third step 8, and the limiting sleeve 4 can limit the cone head 2 from continuing to penetrate into the human body. When the cone head 2 has not yet penetrated into the body, under the elastic action of the spring 7, the tip of the cone head 2 retracts to the limiting sleeve 4. Since the two ends of the spring 7 are fixedly connected to the first step 5 and the second step 6 respectively, the limiting sleeve 4 will not slide off the cone head 2, that is, the spring 7 limits the moving position of the limiting sleeve 4.
[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. An open-circuit cone for spinal surgery, comprising a cone rod (1), the head end of the cone rod (1) having a cone head (2), and the tail end of the cone rod (1) being provided with a handle (3); characterized in that: A limiting sleeve (4) is sleeved on the outer side of the cone head (2), and the limiting sleeve (4) is elastically and movably connected along the axial direction of the cone head (2); the limiting sleeve (4) moves in the direction of the handle (3) to increase the distance that the cone head (2) extends out of the limiting sleeve (4); a limiting structure is provided between the limiting sleeve (4) and the cone head (2) to limit the moving distance of the limiting sleeve (4).
2. The open cone for spinal surgery according to claim 1, characterized in that: The outer side wall of the cone head (2) is provided with a first step (5) towards its tip, the inner side wall of the limiting sleeve (4) is provided with a second step (6), and a spring (7) is clamped between the first step (5) and the second step (6).
3. The open cone for spinal surgery according to claim 1, characterized in that: The limiting structure comprises a third step (8) arranged on the cone head (2) and facing the tip of the cone head (2); the third step (8) is located on a side of the limiting sleeve (4) facing the handle (3); and the limiting sleeve (4) is movably abutted against the third step (8).
4. The open cone for spinal surgery according to claim 1, characterized in that: The limiting structure comprises a limiting bar hole (9) provided on the side wall of the cone head (2) and a limiting pin (10) passing through the side wall of the limiting sleeve (4); the limiting bar hole (9) extends along the axial direction of the cone head (2); and the limiting pin (10) passes through the limiting bar hole (9).
5. The open cone for spinal surgery according to claim 4, characterized in that: An observation window (11) is provided on the side wall of the limiting sleeve (4), and the observation window (11) is movably aligned with the limiting bar hole (9).
6. The open cone for spinal surgery according to claim 1, characterized in that: It also includes a connecting pin (12), a connecting hole (13) is provided at the end of the handle (3) facing the conical rod (1), a connecting column (14) inserted into the connecting hole (13) is provided at the end of the conical rod (1) facing the handle (3), and the connecting pin (12) is inserted through the side wall of the connecting hole (13) and the connecting column (14).
7. The open cone for spinal surgery according to claim 1, characterized in that: The outer side wall of the handle (3) is provided with an anti-slip sleeve (15).