A four-in-one nailer and its installation method

Abstract

The present invention relates to the field of medical devices, and specifically to a four-in-one nailing device and an installation method thereof. The present invention provides a four-in-one nailing device, comprising a perforating needle, an opening sleeve, a threaded sleeve, a connecting sleeve, an adjusting sleeve, and a wrench rod; the perforating needle is installed inside the opening sleeve, the opening sleeve is installed inside the threaded sleeve, the threaded sleeve is installed inside the connecting sleeve, the left part of the connecting sleeve is installed inside the adjusting sleeve, the left plane of the adjusting sleeve is in contact with the right plane of the wrench rod, the opening needle passes through the wrench rod, and all parts are arranged concentrically. The four-in-one nailing device provided by the present invention integrates puncture positioning, guide wire insertion, tapping, and nailing in one tool, reduces the frequent tool transfer during surgery, reduces the difficulty of operation, and improves the doctor's work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a four-in-one nailing device and an installation method thereof. Background Art

[0002] The application of spinal fixation technology has a history of several decades. At present, spinal internal fixators are mostly used to fix the vertebral body after spinal trauma, spondylolisthesis, degenerative diseases and other single-segment or multi-segment fractures. There are many types of fixators on the market, but most of them are composed of unidirectional pedicle screws, universal pedicle screws, connecting rods and other corresponding components.

[0003] The Chinese invention patent with the publication number CN104688326A discloses a pedicle screw nailing device, which is composed of a nailing rod, a nailing sleeve, a direction sheath, a tightening nut, an anti-retraction knob, a locking button, and a spring. The head of the nailing rod is provided with a connector connected to the pedicle screw, and is designed to be T-shaped and straight according to the connection with the unidirectional pedicle screw and the universal pedicle screw, respectively. The middle is provided with a square 8 that cooperates with the locking button. During use, the anti-retraction knob can be directly pushed forward at any angle to lock the pedicle screw. The tail is provided with a quick-change connector, which can be connected to a T-shaped quick-change handle or a straight quick-change handle according to the doctor's needs during surgery. When using the pedicle screw driver, the staff can connect the universal pedicle screw or the single pedicle screw to the connecting head, then hold the direction sheath with their hands, and rotate the T-type quick-change handle or the straight-type quick-change handle to drive the universal pedicle screw or the single pedicle screw on the head to rotate, thereby screwing the screw in.

[0004] However, in actual surgical operations, before using the pedicle screw driver, the staff also needs to use a guide needle or spinal biopsy to drill holes for the actual fixing position of the screw so that the screw can be screwed in stably. During this process, the surgical tools need to be passed multiple times between the surgeon and the nurse at the instrument table, making the operation more cumbersome. Summary of the invention

[0005] In response to the above problems, the present invention provides a four-in-one nailer, including a hole-punching needle, an open sleeve, a threaded sleeve, a connecting sleeve, an adjusting sleeve, and a wrench rod; the hole-punching needle is installed inside the open sleeve, the open sleeve is installed inside the threaded sleeve, the threaded sleeve is installed inside the connecting sleeve, the left side part of the connecting sleeve is installed inside the adjusting sleeve, the left side plane of the adjusting sleeve is in contact with the right side plane of the wrench rod, the opening needle passes through the wrench rod, and all components are arranged concentrically.

[0006] As a preferred technical solution, a limiting block is provided at the end of the opening needle.

[0007] As a preferred technical solution, a plurality of limiting grooves are provided in the middle part of the open sleeve, the size of the limiting grooves matches the limiting block, and corresponding scales are provided on the back side of the limiting grooves; an inner hole is provided inside the open sleeve, and the inner hole is connected to the limiting groove; the opening sleeve is provided with a first external thread on the right side of the limiting groove.

[0008] As a preferred technical solution, two flat wire bosses are symmetrically arranged at the left end of the threaded sleeve, and the flat wire bosses are provided with a second external thread; a marking scale is arranged on the right side of the threaded sleeve; and a section of first internal thread is arranged on the right side of the marking scale.

[0009] As a preferred technical solution, two open grooves are symmetrically arranged on the left half of the connecting sleeve, and the width of the open grooves matches the bottom width of the flat wire boss. A limiting groove is also arranged on the left half of the connecting sleeve; a circle of flange is arranged in the middle part of the connecting sleeve, and six positioning grooves are symmetrically arranged on the left plane of the flange; an observation window is arranged on the right side of the connecting sleeve, and a scale increasing from right to left is arranged on the observation window, and preferably, it is set to "25, 20, 15, 10, 5, 0"; a round handle or a T-shaped handle is arranged on the right end of the connecting sleeve.

[0010] As a preferred technical solution, a second internal thread is provided inside the adjusting sleeve; and a spring positioning pin is provided at each of the two ends of the adjusting sleeve.

[0011] As a preferred technical solution, the wrench rod is hollow inside, a fixing slot and a fixing bolt are provided in the middle part, a positioning pin and a positioning screw are provided at the tail, and the positioning pin cooperates with the limiting slot on the connecting sleeve.

[0012] As a preferred technical solution, the first external thread on the open sleeve and the first internal thread on the threaded sleeve cooperate.

[0013] As a preferred technical solution, according to the four-in-one nail driver described in claim 1, the second external thread on the threaded sleeve and the second internal thread on the adjusting sleeve cooperate with each other.

[0014] The present invention also provides an installation method of the four-in-one nail driver as described above, according to the nail length specification measured before the operation, the opening needle is installed into the inner hole of the opening sleeve, and the limit block is installed into the limit groove corresponding to the corresponding scale; the assembled opening sleeve is screwed into the right inner hole of the threaded sleeve and tightened; the assembled threaded sleeve is installed from the left side of the connecting sleeve, and the flat wire boss of the threaded sleeve is matched with the opening groove of the connecting sleeve to the bottom of the opening groove; the assembled connecting sleeve is screwed into the adjusting sleeve through threaded matching and screwed to the bottom; finally, the wrench rod and the assembled connecting sleeve and adjusting sleeve are assembled together, the limit groove of the connecting sleeve is matched with the positioning pin of the wrench rod, and after the direction of the connecting sleeve is corrected, the positioning screw of the wrench rod is tightened, so that the wrench rod and the connecting sleeve are connected together.

[0015] Beneficial effects:

[0016] (1) Reducing the frequent transfer of tools during surgery: The four-in-one nailing device provided by the present invention integrates puncture positioning, guide wire insertion, tapping and nailing into one tool, thereby reducing the frequent transfer of tools during surgery, reducing the difficulty of operation, and improving the doctor's work efficiency.

[0017] (2) It saves surgical time, reduces the risk of wound exposure and infection for patients, and greatly reduces the health damage to medical staff. At the same time, it can achieve the purpose of surgery accurately, quickly and effectively.

[0018] (3) Improve the accuracy of the operation. The length of the opening needle relative to the pedicle screw is determined by the scale on the opening sleeve. The length of the pedicle screw entering the pedicle bone is determined by the scale on the connecting sleeve. The length of the opening needle traveled is determined by the spring positioning pin on the adjustment sleeve. The progress of the operation is accurately determined to achieve more precise surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a four-in-one nailing device provided by the present invention;

[0020] Figure 2 Schematic diagram of the hole-opening needle structure;

[0021] Figure 3 It is a schematic diagram of the front structure of the open sleeve;

[0022] Figure 4 It is a schematic diagram of the reverse structure of the open sleeve;

[0023] Figure 5 It is a schematic diagram of the side mechanism of the threaded sleeve;

[0024] Figure 6 It is a schematic diagram of the front structure of the threaded sleeve;

[0025] Figure 7 1. It is a schematic diagram of the connecting sleeve structure;

[0026] Figure 8 It is a schematic diagram of the side structure of the connecting sleeve;

[0027] Fig. 9 1. It is a schematic diagram of the structure of the regulating sleeve;

[0028] Fig.10 Schematic diagram of the wrench rod structure;

[0029] Fig.11 It is a four-in-one usage state diagram provided by the present invention;

[0030] Among them, 1-opening needle, 2-opening sleeve, 3-threaded sleeve, 4-connecting sleeve, 5-adjusting sleeve, 6-wrench rod, 7-limit block, 8-limiting groove, 9-flat wire boss, 10-marking scale, 11-opening groove, 12-limiting groove, 13-flange, 14-positioning groove, 15-observation window, 16-spring positioning pin, 17-fixing slot, 18-fixing bolt, 19-positioning pin, 20-positioning screw, 21-first external thread, 22-first internal thread, 23-second external thread, 24-second internal thread. DETAILED DESCRIPTION

[0031] The content of the present invention can be further understood in conjunction with the following detailed description of the preferred implementation method of the present invention and the included examples.

[0032] In this document, relational terms such as first, second, etc. are used only to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprises", or any other predicates thereof already cover non-exclusive inclusion, so that a component, device, or equipment that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such components, devices, or equipment.

[0033] The meaning of "inside" and "outside" in the present invention refers to the direction pointing to the inside of the device as inside, and the opposite direction as outside, relative to the device itself, rather than being a specific limitation on the device mechanism of the present invention.

[0034] The meaning of "left and right" in the present invention refers to that when the reader is facing the accompanying drawings, the left side of the reader is left and the right side of the reader is right, rather than a specific limitation on the device mechanism of the present invention.

[0035] When describing the embodiments of the present application, the use of "preferred", "preferably", "more preferably", etc. refers to the technical solutions of the present invention that can provide certain beneficial effects in certain circumstances. However, other technical solutions may also be preferred under the same circumstances or other circumstances. In addition, the expression of one or more preferred technical solutions does not imply that other technical solutions are not applicable, nor is it intended to exclude other technical solutions from the scope of the present invention.

[0036] The present invention provides a four-in-one nail driver, comprising a hole-punching needle, an open sleeve, a threaded sleeve, a connecting sleeve, an adjusting sleeve, and a wrench rod; the hole-punching needle is installed inside the open sleeve, the open sleeve is installed inside the threaded sleeve, the threaded sleeve is installed inside the connecting sleeve, the left side portion of the connecting sleeve is installed inside the adjusting sleeve, the left side plane of the adjusting sleeve contacts the right side plane of the wrench rod, the opening needle passes through the wrench rod, and all components are arranged concentrically.

[0037] In some preferred embodiments, a limit block is provided at the end of the opening needle.

[0038] In some preferred embodiments, a plurality of limiting grooves are provided in the middle part of the opening sleeve, the size of the limiting grooves matches the limiting block, and corresponding scales are provided on the back side of the limiting grooves; an inner hole is provided inside the opening sleeve, and the inner hole is connected to the limiting groove; the opening sleeve is provided with a first external thread on the right side of the limiting groove.

[0039] In some preferred embodiments, two flat wire bosses are symmetrically arranged at the left end of the threaded sleeve, and the flat wire bosses are provided with a second external thread; a marking scale is arranged on the right side of the threaded sleeve; and a section of first internal thread is arranged on the right side of the marking scale.

[0040] In some preferred embodiments, two opening grooves are symmetrically arranged on the left half of the connecting sleeve, the width of the opening grooves matches the bottom width of the flat wire boss, and a limiting groove is also arranged on the left half of the connecting sleeve; a circle of flange is arranged in the middle part of the connecting sleeve, and six positioning grooves are symmetrically arranged on the left plane of the flange; an observation window is arranged on the right side of the connecting sleeve, and a scale is arranged on the observation window, which is increased from right to left, preferably, it is set to "25, 20, 15, 10, 5, 0". A round handle or a T-shaped handle is arranged on the right end of the connecting sleeve.

[0041] In some preferred embodiments, a second internal thread is provided inside the adjusting sleeve; and a spring positioning pin is provided at each of the two ends of the adjusting sleeve.

[0042] In some preferred embodiments, the wrench rod is hollow inside, a fixing slot and a fixing bolt are provided in the middle portion, a positioning pin and a positioning screw are provided in the tail portion, and the positioning pin cooperates with the limiting slot on the connecting sleeve.

[0043] In some preferred embodiments, the first external thread on the open sleeve matches the first internal thread on the threaded sleeve.

[0044] In some preferred embodiments, according to the four-in-one nail driver according to claim 1, the second external thread on the threaded sleeve cooperates with the second internal thread on the adjusting sleeve.

[0045] The present invention provides a method for installing the four-in-one nailing device as described above:

[0046] (1) According to the nail length specification measured before the operation, the opening needle 1 is inserted into the inner hole of the opening sleeve 2, and the limit block 7 is installed into the limit groove 8 corresponding to the corresponding scale;

[0047] (2) Screw the assembled open sleeve 2 into the right inner hole of the threaded sleeve 3 and tighten it;

[0048] (3) The assembled threaded sleeve 3 is installed from the left side of the connecting sleeve 4, and the flat wire boss 9 of the threaded sleeve 3 is matched with the opening groove 11 of the connecting sleeve 4 to the bottom of the opening groove 11;

[0049] (4) Screw the assembled connecting sleeve 4 into the adjusting sleeve 5 through threaded engagement and screw it to the bottom;

[0050] (5) Finally, assemble the wrench rod 6 and the assembled connecting sleeve 4 and adjusting sleeve 5 together. The limiting groove 12 of the connecting sleeve 4 cooperates with the positioning pin 19 of the wrench rod 6. After the direction of the connecting sleeve 4 is corrected, tighten the positioning screw 20 of the wrench rod 6 to connect the wrench rod 6 and the connecting sleeve 4 together.

[0051] Directions:

[0052] (1) Insert the pedicle screw to be implanted from the left side of the opening needle 1, fix the long arm part of the pedicle screw in the fixing slot 17, and tighten the fixing bolt 18;

[0053] (2) Find the pedicle screw insertion point of the patient and place the tip of the opening needle 1 against the bone surface;

[0054] (3) Hold the connecting sleeve 4 and rotate the adjusting sleeve 5. The threaded sleeve 3 moves to the left under the action of the thread. When the adjusting sleeve 5 rotates, each time the spring positioning pin 16 and the positioning groove 14 of the connecting sleeve 4 contact each other, the opening needle 1 moves 1 mm.

[0055] (4) After the adjusting sleeve 5 rotates one circle, a bone hammer is used to knock the right end of the connecting sleeve 4, and the hole-opening needle 1 is inserted into the cortical bone of the pedicle by the knocking of the bone hammer. Then, the adjusting sleeve 5 is further rotated one circle to adjust the extension length of the hole-opening needle 1, and the hole-opening needle 1 is inserted into the cancellous bone of the pedicle by the knocking of the bone hammer, thereby achieving the positioning of the hole-opening needle 1;

[0056] (5) Until the adjusting sleeve 5 cannot rotate any further, the threaded sleeve 3 is at the rightmost end of the stroke, and the mark on the threaded sleeve 3 is at the "25" position in the observation window;

[0057] (6) Then, hold the adjusting sleeve 5 still and rotate the right end of the connecting sleeve 4. The wrench rod rotates together with the connecting sleeve 4 under the fixing action of the positioning screw 20, thereby driving the root-tracking bone screw to rotate and enter the root-tracking bone; at the same time, the threaded sleeve 3 moves to the right under the action of the thread, driving the opening needle 1 to move to the right and withdraw from the pedicle.

[0058] (7) The implantation is completed until the pedicle screw is rotated until the screw seat contacts the bone surface.

[0059] Example

[0060] Example 1

[0061] According to the attached Figures 1 to 10The four-in-one nailing device shown in the figure comprises a hole-opening needle 1, an opening sleeve 2, a threaded sleeve 3, a connecting sleeve 4, an adjusting sleeve 5, and a spanner rod 6; the hole-opening needle 1 is installed inside the opening sleeve 2, the opening sleeve 2 is installed inside the threaded sleeve 3, the threaded sleeve 3 is installed inside the connecting sleeve 4, the left part of the connecting sleeve 4 is installed inside the adjusting sleeve 5, the left plane of the adjusting sleeve 5 is in contact with the right plane of the spanner rod 6, the hole-opening needle passes through the spanner rod 6, and all the components are arranged concentrically. A limiting block 7 is provided at the end of the hole-opening needle 1. A plurality of limiting grooves 8 are provided in the middle part of the opening sleeve 2, the size of the limiting grooves 8 matches the limiting block 7, and the back side of the limiting groove 8 is provided with corresponding scales; an inner hole is provided inside the opening sleeve 2, and the inner hole is connected to the limiting groove 8; the hole-opening sleeve is provided with a first external thread 21 on the right side of the limiting groove 8. Two flat wire bosses 9 are symmetrically arranged at the left end of the threaded sleeve 3, and the flat wire bosses 9 are provided with a second external thread 23; a marking scale 10 is arranged on the right side of the threaded sleeve 3; and a first internal thread 22 is arranged on the right side of the marking scale 10. Two opening grooves 11 are symmetrically arranged on the left half of the connecting sleeve 4, and the width of the opening grooves 11 matches the bottom width of the flat wire boss 9. A limiting groove 12 is also arranged on the left half of the connecting sleeve 4; a circle of flanges 13 are arranged in the middle part of the connecting sleeve 4, and six positioning grooves 14 are symmetrically arranged on the left plane of the flange 13; an observation window 15 is arranged on the right side of the connecting sleeve 4, and a scale is arranged on the observation window 15, which is "25, 20, 15, 10, 5, 0" from right to left. A second internal thread 24 is arranged inside the adjusting sleeve 5; and a spring positioning pin 16 is arranged at both ends of the adjusting sleeve 5. The wrench rod 6 is hollow inside, with a fixing slot 17 and a fixing bolt 18 in the middle, and a positioning pin 19 and a positioning screw 20 in the tail. The positioning pin 19 cooperates with the limiting slot 12 on the connecting sleeve 4. The first external thread 21 on the opening sleeve 2 cooperates with the first internal thread 22 on the threaded sleeve 3. The second external thread 23 on the threaded sleeve 3 cooperates with the second internal thread 24 on the adjusting sleeve 5. The right end of the connecting sleeve 4 is provided with a T-shaped handle.

[0062] Installation method:

[0063] (1) According to the nail length specification measured before the operation, the opening needle 1 is inserted into the inner hole of the opening sleeve 2, and the limit block 7 is installed into the limit groove 8 corresponding to the corresponding scale;

[0064] (2) Screw the assembled open sleeve 2 into the right inner hole of the threaded sleeve 3 and tighten it;

[0065] (3) The assembled threaded sleeve 3 is installed from the left side of the connecting sleeve 4, and the flat wire boss 9 of the threaded sleeve 3 is matched with the opening groove 11 of the connecting sleeve 4 to the bottom of the opening groove 11;

[0066] (4) Screw the assembled connecting sleeve 4 into the adjusting sleeve 5 through threaded engagement and screw it to the bottom;

[0067] (5) Finally, assemble the wrench rod 6 and the assembled connecting sleeve 4 and adjusting sleeve 5 together. The limiting groove 12 of the connecting sleeve 4 cooperates with the positioning pin 19 of the wrench rod 6. After the direction of the connecting sleeve 4 is corrected, tighten the positioning screw 20 of the wrench rod 6 to connect the wrench rod 6 and the connecting sleeve 4 together.

[0068] Directions:

[0069] (1) Insert the pedicle screw to be implanted from the left side of the opening needle 1, fix the long arm part of the pedicle screw in the fixing slot 17, and tighten the fixing bolt 18;

[0070] (2) Find the pedicle screw insertion point of the patient and place the tip of the opening needle 1 against the bone surface;

[0071] (3) Hold the connecting sleeve 4 and rotate the adjusting sleeve 5. The threaded sleeve 3 moves to the left under the action of the thread. When the adjusting sleeve 5 rotates, each time the spring positioning pin 16 and the positioning groove 14 of the connecting sleeve 4 contact each other, the opening needle 1 moves 1 mm.

[0072] (4) After the adjusting sleeve 5 rotates one circle, a bone hammer is used to knock the right end of the connecting sleeve 4, and the hole-opening needle 1 is inserted into the cortical bone of the pedicle by the knocking of the bone hammer. Then, the adjusting sleeve 5 is further rotated one circle to adjust the extension length of the hole-opening needle 1, and the hole-opening needle 1 is inserted into the cancellous bone of the pedicle by the knocking of the bone hammer, thereby achieving the positioning of the hole-opening needle 1;

[0073] (5) Until the adjusting sleeve 5 cannot rotate any further, the threaded sleeve 3 is at the rightmost end of the stroke, and the mark on the threaded sleeve 3 is at the "25" position in the observation window;

[0074] (6) Then, hold the adjusting sleeve 5 still and rotate the right end of the connecting sleeve 4. The wrench rod rotates together with the connecting sleeve 4 under the fixing action of the positioning screw 20, thereby driving the root-tracking bone screw to rotate and enter the root-tracking bone; at the same time, the threaded sleeve 3 moves to the right under the action of the thread, driving the opening needle 1 to move to the right and withdraw from the pedicle.

[0075] (7) The implantation is completed until the pedicle screw is rotated until the screw seat contacts the bone surface.

[0076] Example 2

[0077] According to the attached Figures 1 to 10The four-in-one nailing device shown in the figure comprises a hole-opening needle 1, an opening sleeve 2, a threaded sleeve 3, a connecting sleeve 4, an adjusting sleeve 5, and a spanner rod 6; the hole-opening needle 1 is installed inside the opening sleeve 2, the opening sleeve 2 is installed inside the threaded sleeve 3, the threaded sleeve 3 is installed inside the connecting sleeve 4, the left part of the connecting sleeve 4 is installed inside the adjusting sleeve 5, the left plane of the adjusting sleeve 5 is in contact with the right plane of the spanner rod 6, the hole-opening needle passes through the spanner rod 6, and all the components are arranged concentrically. A limiting block 7 is provided at the end of the hole-opening needle 1. A plurality of limiting grooves 8 are provided in the middle part of the opening sleeve 2, the size of the limiting grooves 8 matches the limiting block 7, and the back side of the limiting groove 8 is provided with corresponding scales; an inner hole is provided inside the opening sleeve 2, and the inner hole is connected to the limiting groove 8; the hole-opening sleeve is provided with a first external thread 21 on the right side of the limiting groove 8. Two flat wire bosses 9 are symmetrically arranged at the left end of the threaded sleeve 3, and the flat wire bosses 9 are provided with a second external thread 23; a marking scale 10 is arranged on the right side of the threaded sleeve 3; and a first internal thread 22 is arranged on the right side of the marking scale. Two opening grooves 11 are symmetrically arranged on the left half of the connecting sleeve 4, and the width of the opening grooves 11 matches the bottom width of the flat wire boss 9. A limiting groove 12 is also arranged on the left half of the connecting sleeve 4; a circle of flanges 13 are arranged in the middle part of the connecting sleeve 4, and six positioning grooves 14 are symmetrically arranged on the left plane of the flange 13; an observation window 15 is arranged on the right side of the connecting sleeve 4, and a scale is arranged on the observation window 15, which is "25, 20, 15, 10, 5, 0" from right to left. A second internal thread 24 is arranged inside the adjusting sleeve 5; and a spring positioning pin 16 is arranged at both ends of the adjusting sleeve 5. The wrench rod 6 is hollow inside, with a fixing slot 17 and a fixing bolt 18 in the middle, and a positioning pin 19 and a positioning screw 20 in the tail. The positioning pin 19 cooperates with the limiting slot 12 on the connecting sleeve 4. The first external thread 21 on the opening sleeve 2 cooperates with the first internal thread 22 on the threaded sleeve 3. The second external thread 23 on the threaded sleeve 3 cooperates with the second internal thread 24 on the adjusting sleeve 5. The right end of the connecting sleeve 4 is provided with a T-shaped handle.

[0078] Surgical requirements: Implantation of a 20 mm pedicle screw.

[0079] Installation method:

[0080] (1) According to the nail length specification measured before the operation, the opening needle 1 is inserted into the inner hole of the opening sleeve 2, and the limit block is installed into the limit groove with a scale of 40;

[0081] (2) Screw the assembled open sleeve 2 into the right inner hole of the threaded sleeve 3 and tighten it;

[0082] (3) Install the assembled threaded sleeve 3 from the left side of the connecting sleeve 4, and fit the flat wire boss of the threaded sleeve 3 with the opening groove of the connecting sleeve 4 to the bottom of the opening groove;

[0083] (4) Screw the assembled connecting sleeve 4 into the adjusting sleeve 5 through threaded engagement and screw it to the bottom;

[0084] (5) Finally, assemble the wrench rod 6 and the assembled connecting sleeve 4 and adjusting sleeve 5 together. The limit groove of the connecting sleeve 4 cooperates with the positioning pin of the wrench rod 6. After the direction of the connecting sleeve 4 is corrected, tighten the positioning screw 20 of the wrench rod 6 to connect the wrench rod 6 and the connecting sleeve 4 together.

[0085] Directions:

[0086] (1) Insert the pedicle screw to be implanted from the left side of the opening needle 1, fix the long arm part of the pedicle screw in the fixing slot 17, and tighten the fixing bolt 18;

[0087] (2) Find the pedicle screw insertion point of the patient and place the tip of the opening needle 1 against the bone surface;

[0088] (3) Hold the connecting sleeve 4 and rotate the adjusting sleeve 5. The threaded sleeve 3 moves to the left under the action of the thread. When the adjusting sleeve 5 rotates, each time the spring positioning pin 16 and the positioning groove 14 of the connecting sleeve 4 contact each other, the opening needle 1 moves 1 mm.

[0089] (4) After the adjusting sleeve 5 rotates one circle, a bone hammer is used to knock the right end of the connecting sleeve 4, and the hole-opening needle 1 is inserted into the cortical bone of the pedicle by the knocking of the bone hammer. Then, the adjusting sleeve 5 is further rotated one circle to adjust the extension length of the hole-opening needle 1, and the hole-opening needle 1 is inserted into the cancellous bone of the pedicle by the knocking of the bone hammer, thereby achieving the positioning of the hole-opening needle 1;

[0090] (5) Until the adjusting sleeve 5 cannot rotate any further, the threaded sleeve 3 is at the rightmost end of the stroke, and the mark on the threaded sleeve 3 is at the "25" position in the observation window;

[0091] (6) Then, hold the adjusting sleeve 5 still and rotate the right end of the connecting sleeve 4. The wrench rod rotates together with the connecting sleeve 4 under the fixing action of the positioning screw 20, thereby driving the root-tracking bone screw to rotate and enter the root-tracking bone; at the same time, the threaded sleeve 3 moves to the right under the action of the thread, driving the opening needle 1 to move to the right and withdraw from the pedicle.

[0092] (7) The implanted pedicle screw is rotated until the screw seat contacts the bone surface. At this time, the scale is at the "20" position in the observation window, and the implantation is completed.

[0093] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A four-in-one nailing device, characterized in that: The invention comprises a hole-piercing needle (1), an open sleeve (2), a threaded sleeve (3), a connecting sleeve (4), an adjusting sleeve (5), and a spanner rod (6); the hole-piercing needle (1) is installed inside the open sleeve (2), the open sleeve (2) is installed inside the threaded sleeve (3), the threaded sleeve (3) is installed inside the connecting sleeve (4), the left side portion of the connecting sleeve (4) is installed inside the adjusting sleeve (5), the left side plane of the adjusting sleeve (5) is in contact with the right side plane of the spanner rod (6), the hole-piercing needle (1) passes through the spanner rod (6), and all the components are arranged concentrically; A limiting block (7) is provided at the end of the perforating needle (1); The middle part of the open sleeve (2) is provided with a plurality of limiting grooves (8), the size of the limiting grooves (8) matches the limiting block (7), and the back side of the limiting grooves (8) is provided with corresponding scales; an inner hole is provided inside the open sleeve (2), and the inner hole is connected to the limiting grooves (8); the open sleeve (2) is provided with a first external thread (21) on the right side of the limiting grooves (8); Two flat wire bosses (9) are symmetrically arranged at the left end of the threaded sleeve (3), and a second external thread (23) is arranged on the flat wire boss (9); a marking scale (10) is arranged on the right side of the threaded sleeve (3); and a first internal thread (22) is arranged on the right side of the marking scale (10); The left half of the connecting sleeve (4) is symmetrically provided with two opening grooves (11), the width of the opening grooves (11) matches the bottom width of the flat wire boss (9), and the left half of the connecting sleeve (4) is also provided with a limiting groove (12); the middle part of the connecting sleeve (4) is provided with a circle of flanges (13), and six positioning grooves (14) are symmetrically provided on the left plane of the flange (13); the right side of the connecting sleeve (4) is provided with an observation window (15), and the observation window (15) is provided with scales that increase from right to left in sequence; the right end of the connecting sleeve (4) is provided with a round handle or a T-shaped handle.

2. A four-in-one nailing device according to claim 1, characterized in that: The adjusting sleeve (5) is provided with a second internal thread (24) inside; and a spring positioning pin (16) is provided at each of the two ends of the adjusting sleeve (5).

3. The four-in-one nailing device according to claim 1, characterized in that: The wrench rod (6) is hollow inside, a fixing slot (17) and a fixing bolt (18) are provided in the middle part, and a positioning pin (19) and a positioning screw (20) are provided in the tail part, and the positioning pin (19) cooperates with the limiting slot (12) on the connecting sleeve (4).

4. The four-in-one nailing device according to claim 1, characterized in that: The first external thread (21) on the open sleeve (2) cooperates with the first internal thread (22) on the threaded sleeve (3).

5. The four-in-one nailing device according to claim 1, characterized in that: The second external thread (23) on the threaded sleeve (3) cooperates with the second internal thread (24) on the adjustment sleeve (5).

6. A method for installing a four-in-one nailing device according to any one of claims 1 to 5, characterized in that: According to the nail length specification measured before the operation, the hole-opening needle (1) is installed into the inner hole of the opening sleeve (2), and the limit block (7) is installed into the limit groove (8) corresponding to the corresponding scale; the assembled opening sleeve (2) is screwed into the right inner hole of the threaded sleeve (3) and tightened; the assembled threaded sleeve (3) is installed from the left side of the connecting sleeve (4), and the flat wire boss (9) of the threaded sleeve (3) and the opening groove (11) of the connecting sleeve (4) are matched to the opening groove (11). The bottom of the connecting sleeve (4) is screwed into the adjusting sleeve (5) through threaded engagement and screwed to the bottom; finally, the wrench rod (6) is assembled with the connecting sleeve (4) and the adjusting sleeve (5), the limiting groove (12) of the connecting sleeve (4) is engaged with the positioning pin (19) of the wrench rod (6), and after the direction of the connecting sleeve (4) is corrected, the positioning screw (20) of the wrench rod (6) is tightened, thereby connecting the wrench rod (6) and the connecting sleeve (4) together.

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