Bone drill guide

Abstract

The present application relates to the technical field of medical devices, and discloses a bone drill guide, comprising a tubular fixed guide sleeve, a fixed handle at the outer edge of the upper end of the fixed guide sleeve, a tubular sliding guide sleeve sleeved in the fixed guide sleeve, a rod-shaped core rod sleeved in the sliding guide sleeve, a spike portion provided at the lower end of the core rod; a positioning portion for abutting against bone tissue is provided at the lower end of the fixed guide sleeve. The bone drill guide of the present application can adapt to drill bits of different diameters, save resources, avoid the entanglement of the drill bit with soft tissue during the drilling process, and relieve the pain of patients.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a bone drill guide. Background Art

[0002] Bone tissue often needs to be drilled during surgical operations. During the drilling operation, in order to drill a specific position, a guide is needed to assist in positioning and guiding. The bone drill is used together with the guide.

[0003] Traditional guides have a single structure and poor adaptability. During drilling operations, guides can only adapt to the drilling needs of a single-diameter drill. When using bone drills with drills of different diameters, multiple guides are required, resulting in a waste of resources. When drilling bone tissue, the fascia, nerves, muscles and other soft tissues covering the bone tissue need to be isolated from the drilling channel to avoid entanglement between the drill bit and the fascia, nerves and other soft components during the drilling process. Currently, when using guides, other instruments are needed to move the fascia, nerves and other soft tissues away from the drilling channel, which makes the drilling operation cumbersome and complicated, and increases the difficulty of drilling. Summary of the invention

[0004] In order to enable a bone drill guide to adapt to drill bits of different diameters, save resources, and avoid entanglement of the drill bit with soft tissue during the drilling process, the present application provides a bone drill guide.

[0005] The above application objectives of this application are achieved through the following technical solutions:

[0006] A bone drill guide comprises a tubular fixed guide sleeve, the upper outer edge of the fixed guide sleeve is fixedly connected to a handle, a tubular sliding guide sleeve is sleeved in the fixed guide sleeve, a rod-shaped core rod is sleeved in the sliding guide sleeve, and a spike portion is provided at the lower end of the core rod; a positioning portion for abutting against bone tissue is provided at the lower end of the fixed guide sleeve.

[0007] By adopting the above technical solution, a core rod is arranged in the sliding guide sleeve, and the core rod is pushed toward the direction of the bone tissue that needs to be drilled. The spike portion at the front end of the core rod can squeeze the soft tissue at the location where the hole needs to be drilled outward, so that the soft tissue at this location avoids the drilling channel, and avoids the drill bit and the soft tissue from being entangled and adhered during drilling, thereby alleviating the patient's pain; a sliding guide sleeve is arranged in the fixed guide sleeve, and when drilling, a sliding guide sleeve or a fixed guide sleeve with a corresponding inner diameter is selected according to the size of the drill bit diameter to match it, so that the guide can adapt to drill bits of different diameters, thereby improving the adaptability of the guide to the drill bit and saving resources.

[0008] Preferably, the positioning portion is a wedge-shaped block that gradually narrows from top to bottom, and two side surfaces of the wedge-shaped block are symmetrically arranged along the diameter direction of the fixed guide sleeve.

[0009] By adopting the above technical solution, the wedge block can be against the surface of the bone tissue that needs to be drilled to prevent the fixed guide sleeve from moving on the bone tissue surface due to force during the drilling process, thereby achieving better positioning and guiding effect and improving the quality and efficiency of drilling.

[0010] Preferably, the two side surfaces of the wedge block intersect on the diameter of the fixed guide sleeve, and the angle between the two side surfaces of the wedge block is α, and α is 50°-70°.

[0011] By adopting the above technical solution, two teeth are formed between the lower ends of the two side surfaces of the wedge block and the side walls of the fixed guide sleeve to abut against the bone tissue for positioning; the 50°-70° angle between the two side surfaces of the wedge block makes it easier for the fixed guide sleeve to squeeze the soft tissue outward, avoid entanglement of the soft tissue and the drill bit, and reduce the patient's pain.

[0012] Preferably, the sliding guide sleeve comprises a first sliding guide sleeve and a second sliding guide sleeve, the first sliding guide sleeve is sleeved in the fixed guide sleeve, the second sliding guide sleeve is sleeved in the first sliding guide sleeve, and the core rod is sleeved in the second sliding guide sleeve.

[0013] By adopting the above technical solution, the inner diameters of the fixed guide sleeve, the first sliding guide sleeve and the second sliding guide sleeve can respectively correspond to three drill bits of different diameters, so that the guide can correspond to three drill bits of different specifications, saving resources and improving the adaptability of the guide to drill bits of different specifications.

[0014] Preferably, the lengths of the fixed guide sleeve, the first sliding guide sleeve, the second sliding guide sleeve and the core rod increase in sequence.

[0015] By adopting the above technical solution, the lower end of the fixed guide sleeve can extend out of the second sliding guide sleeve, the first sliding guide sleeve and the core rod in sequence from top to bottom, thereby ensuring smooth guiding of the drilling guide.

[0016] Preferably, the lower ends of the first sliding guide sleeve and the second sliding guide sleeve are both provided with chamfers, and the upper ends of the first sliding guide sleeve and the second sliding guide sleeve are both provided with outwardly protruding retaining rings.

[0017] By adopting the above technical solution, chamfers are set at the lower ends of the first sliding guide sleeve and the second sliding guide sleeve, which makes it easier for the first sliding guide sleeve and the second sliding guide sleeve to squeeze the soft tissue at the location where a hole needs to be drilled outward, so that the soft tissue avoids the drilling channel; retaining rings are set at the upper ends of the first sliding guide sleeve and the second sliding guide sleeve, and the retaining rings can be pushed to push the first sliding guide sleeve or the second sliding guide sleeve toward the surface of the bone tissue where a hole needs to be drilled, thereby completing the guidance of the drilling.

[0018] Preferably, the core rod includes a core rod body, the spike portion is arranged at the lower end of the core rod body, a push-pull handle is provided at the upper end of the core rod body, and a limit block protruding outward is provided on the core rod body near the lower end of the push-pull handle; the core rod body, the spike portion, the limit block and the push-pull handle are integrally formed.

[0019] By adopting the above technical solution, when the drilling position is determined, the push-pull handle can be moved to make the core rod body slide in the sliding guide sleeve, and the spiked portion at the lower end of the core rod body can serve as a guide for the guide, squeezing the soft tissue at the drilling location outward, leaving a drilling channel for the drill bit; the limit block can leave space for the user to hold the push-pull handle, making it convenient to use the core rod; at the same time, the limit block can also push the retaining ring on the sliding guide sleeve to guide the sliding guide sleeve toward the bone tissue.

[0020] Preferably, the spike portion is a cone.

[0021] By adopting the above technical solution, the lower end of the core rod adopts a cone-shaped puncture part. When drilling in bone tissue, the fascia, nerves and other soft tissues at the location where the hole needs to be drilled can be squeezed outward through the cone-shaped puncture part, thereby reducing the propulsion resistance of the core rod body, ensuring the smoothness of the drilling channel, avoiding the entanglement of the drill bit with the soft tissue during the drilling process, alleviating the patient's pain, and improving the drilling efficiency.

[0022] Preferably, the angle between the length direction of the handle and the axial direction of the fixed guide sleeve is β, and β is 100°-120°.

[0023] By adopting the above technical solution, the angle between the length direction of the handle and the axial direction of the fixed guide sleeve is 100°-120°, which conforms to the ergonomic design and can meet the requirement of not feeling tired even when holding it for a long time.

[0024] Preferably, the fixed guide sleeve, the first sliding guide sleeve, the second sliding guide sleeve and the core rod are all made of stainless steel.

[0025] By adopting the above technical solution, the fixed guide sleeve, the first sliding guide sleeve, the second sliding guide sleeve and the core rod are made of stainless steel, which can prevent rust and facilitate cleaning and disinfection.

[0026] In summary, the beneficial technical effects of this application are:

[0027] The present application avoids waste of resources by sleeved a sliding guide sleeve inside a fixed guide sleeve, and determines the fixed guide sleeve or sliding guide sleeve that matches with drill bits of different diameters to guide drilling; and sleeved a core rod on the sliding guide sleeve, and when positioning the drilling, the fascia, nerves and other soft tissues on the bone tissue are squeezed and pushed by the spikes at the lower end of the core rod body, ensuring that the soft tissue avoids the drilling channel, and preventing the drill bit from being entangled with the fascia, nerves and other soft tissues during rotation, thereby alleviating the patient's pain and ensuring the smooth progress of the drilling work. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of this application;

[0029] Figure 2 is an exploded view of this application;

[0030] Figure 3 is a cross-sectional view of a fixed guide sleeve and a handle according to the first embodiment of the present application;

[0031] Figure 4 is a cross-sectional view of a fixed guide sleeve and a handle according to a second embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the structure of using the second sliding guide sleeve to guide the drill bit in the present application;

[0033] Figure 6 It is a schematic diagram of the structure of the present application using a first sliding guide sleeve to guide the drill bit;

[0034] Figure 7 It is a structural schematic diagram of the present application using a fixed guide sleeve to guide the drill bit.

[0035] As shown in the figure, 1. fixed guide sleeve; 11. positioning part; 111. serration; 2. handle; 3. sliding guide sleeve; 4. first sliding guide sleeve; 5. second sliding guide sleeve; 6. core rod; 61. core rod body; 62. spike part; 63. push-pull handle; 64. limit block; 7. retaining ring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] like Figure 1 As shown, a bone drill guide comprises a tubular fixed guide sleeve 1, a handle 2 is fixedly connected to the outer edge of the upper end of the fixed guide sleeve 1, a tubular sliding guide sleeve 3 is sleeved in the fixed guide sleeve 1, the inner diameter of the fixed guide sleeve 1 is adapted to the outer diameter of the sliding guide sleeve 3, a rod-shaped core rod 6 is sleeved in the sliding guide sleeve 3, the inner diameter of the sliding guide sleeve 3 is adapted to the outer diameter of the core rod 6, and a spike portion 62 is provided at the lower end of the core rod 6; a positioning portion 11 for abutting against bone tissue is provided at the lower end of the fixed guide sleeve 1.

[0038] The core rod 6 is pushed toward the bone tissue to be drilled, and the spike portion 62 at the front end of the core rod 6 can squeeze the soft tissue outward, thereby forming a drilling channel, so that when drilling, the drill bit and the soft tissue can be prevented from being entangled and adhered, thereby alleviating the patient's pain. A sliding guide sleeve 3 is sleeved inside the fixed guide sleeve 1. When drilling, a sliding guide sleeve 3 or a fixed guide sleeve 1 with a corresponding inner diameter is selected according to the size of the drill bit diameter to match it, so that the guide can adapt to drill bits of different diameters, thereby increasing the adaptability of the guide to the drill bit and saving resources.

[0039] like Figure 2 As shown, the core rod 6 includes a core rod body 61, a spike portion 62 is arranged at the lower end of the core rod body 61, the spike portion 62 is a cone, a push-pull handle 63 is provided at the upper end of the core rod body 61, and a limit block 64 protruding outward is provided on the core rod body 61 near the lower end of the push-pull handle 63; the core rod body 61, the spike portion 62, the limit block 64 and the push-pull handle 63 are formed as one piece.

[0040] When the drilling position is determined, the core rod body 61 can be moved in the sliding guide sleeve 3 through the push-pull handle 63, so that the cone-shaped spike 62 at the lower end of the core rod body 61 can guide the guide, squeeze the soft tissue at the drilling location outward, and leave a drilling channel for the drill bit to avoid the drill bit from being entangled with the soft tissue during the drilling process; the limit block 64 is cylindrical, and its lower end abuts against the upper end of the sliding guide sleeve 3. The length of the limit block 64 can leave space for the user to hold the push-pull handle 63. When the push-pull handle 63 is pushed, the limit block 64 presses against the upper end of the sliding guide sleeve 3, so that the sliding guide sleeve 3 is pushed toward the bone tissue to be drilled, forming a drilling channel for the drill bit.

[0041] like Figure 2 , 3 As shown, the positioning portion 11 is a wedge-shaped block that gradually narrows from top to bottom, and the two side surfaces of the wedge-shaped block are symmetrically arranged along the diameter direction of the fixed guide sleeve 1.

[0042] When the wedge block is against the surface of the bone tissue to be drilled, it can prevent the fixed guide sleeve 1 from moving on the bone tissue surface due to force during the drilling process, thereby achieving better positioning and guiding effects and improving the quality and efficiency of drilling.

[0043] like Figure 3 As shown, in the first embodiment of the present application, the two side surfaces of the wedge block intersect on the diameter of the fixed guide sleeve 1, and the angle between the two side surfaces of the wedge block is α, α is 50°-70°, and preferably α is 60°. The wedge block is more convenient for the fixed guide sleeve 1 to squeeze the soft tissue outward, avoid the entanglement of the soft tissue and the drill bit, and reduce the pain of the patient.

[0044] like Figure 4As shown, in the second embodiment of the present application, an angle α is formed between the two side surfaces of the wedge block, and α is 50°-70°. The length of the intersection of the side surface of the wedge block and the bottom end of the fixed guide sleeve 1 is less than the diameter length of the fixed guide sleeve 1. A serration 111 is provided at the lower end of the side wall of the fixed guide sleeve 1. When the guide is used for drilling guidance, the serration 111 at the lower end of the positioning portion 11 abuts against the surface of the bone tissue to be drilled, which can prevent the fixed guide sleeve 1 from moving on the surface of the bone tissue due to force during the drilling process, thereby stabilizing the fixed guide sleeve 1.

[0045] The sliding guide sleeve 3 of this embodiment includes a first sliding guide sleeve 4 and a second sliding guide sleeve 5. The first sliding guide sleeve 4 is sleeved in the fixed guide sleeve 1, the second sliding guide sleeve 5 is sleeved in the first sliding guide sleeve 4, and the core rod 6 is sleeved in the second sliding guide sleeve 5; the lengths of the fixed guide sleeve 1, the first sliding guide sleeve 4, the second sliding guide sleeve 5 and the core rod 6 increase in sequence.

[0046] By providing two sliding guide sleeves 3, namely a first sliding guide sleeve 4 and a second sliding guide sleeve 5, the guide device of the present application can correspond to three drill bits of different diameters respectively, thus saving resources and improving the adaptability of the guide device to drill bits of different specifications.

[0047] Of course, one or more than three sliding guide sleeves 3 may be provided, and the number of the sliding guide sleeves 3 may be selected according to the specific situation.

[0048] In this embodiment, the lengths of the fixed guide sleeve 1, the first sliding guide sleeve 4, the second sliding guide sleeve 5 and the core rod 6 are arranged in increasing order, which ensures smooth positioning and guiding of the drilling guide.

[0049] In order to reduce the resistance between the first sliding guide sleeve 4 and the second sliding guide sleeve 5 and the soft tissue during the positioning and guiding process, chamfers are provided at the lower ends of the first sliding guide sleeve 4 and the second sliding guide sleeve 5; in order to facilitate the pushing of the first sliding guide sleeve 4 and the second sliding guide sleeve 5 so that the first sliding guide sleeve 4 or the second sliding guide sleeve 5 can be smoothly pushed toward the surface of the bone tissue, the upper ends of the first sliding guide sleeve 4 and the second sliding guide sleeve 5 are provided with outwardly protruding retaining rings 7.

[0050] like Figure 3 , 4 As shown, the angle between the length direction of the handle 2 and the axis direction of the fixed guide sleeve 1 is β, and β is 100°-120°. Preferably, β is 110° to meet the ergonomic design, so that the handle 2 will not feel tired even if held for a long time during the drilling process; in order to prevent slipping when holding the handle 2, the outer wall of the handle 2 is also provided with anti-slip grooves.

[0051] In order to prevent the guide from rusting and facilitate cleaning and disinfection, the fixed guide sleeve 1, the first sliding guide sleeve 4, the second sliding guide sleeve 5 and the core rod 6 are all made of stainless steel.

[0052] The specific working process of the present application is as follows: first determine the position of drilling on the bone tissue, then align the spike portion 62 of the core rod 6 on the guide with the drilling position, and push the push-pull handle 63 by hand. The conical spike portion 62 at the front end of the core rod 6 squeezes the fascia, nerves and other soft tissues on the drilling channel outward, so that the fascia, nerves and other soft tissues on the drilling channel avoid the drilling channel. At the same time, the limit block 64 on the core rod body 61 also squeezes the retaining ring 7 on the second sliding guide sleeve 5, so that the second sliding guide sleeve 5 moves toward the bone tissue direction and squeezes the soft tissue outward. The retaining ring 7 on the second sliding guide sleeve 5 also Push the retaining ring 7 on the first sliding guide sleeve 4, so that the first sliding guide sleeve 4 moves toward the bone tissue direction and squeezes the soft tissue outwards. The retaining ring 7 of the first sliding guide sleeve 4 pushes the upper end of the fixed guide sleeve 1, so that the fixed guide sleeve 1 moves toward the bone tissue direction and squeezes the soft tissue outwards. When the limit block 64 pushes the second sliding guide sleeve 5 to the limit position, press the handle 2 again, and finally make the lower end of the positioning part 11 abut against the surface of the bone tissue to be drilled. At this time, the lower ends of the first sliding guide sleeve 4 and the second sliding guide sleeve 5 are respectively retracted into the fixed guide sleeve 1, and finally the core rod 6 is pulled out of the second sliding guide sleeve 5. According to the size of the drill bit diameter, the first sliding guide sleeve 4 or the second sliding guide sleeve 5 or the fixed guide sleeve 1 adapted thereto is selected and used, and the drill bit is inserted into the corresponding fixed guide sleeve 1 or the first sliding guide sleeve 4 or the second sliding guide sleeve 5, so as to realize the guidance and positioning of the bone drill bit in the guide, improve the efficiency and accuracy of the drilling work, and avoid the entanglement between the soft tissue and the drill bit, and relieve the pain of the patient.

[0053] Figure 5 This is the usage state when the diameter of the bone drill bit matches the inner diameter of the second sliding guide sleeve 5 .

[0054] Figure 6 This is the usage state when the diameter of the bone drill bit is matched with the inner diameter of the first sliding guide sleeve 4 , and at this time, the second sliding guide sleeve 5 has been pulled out from the first sliding guide sleeve 4 .

[0055] Figure 7 This is the usage state when the diameter of the bone drill bit is matched with the inner diameter of the fixed guide sleeve 1 , and at this time, the first sliding guide sleeve 4 and the second sliding guide sleeve 5 have been respectively pulled out from the fixed guide sleeve 1 .

[0056] The bone drill bit is adapted through different inner diameters of the fixed guide sleeve 1 or the sliding guide sleeve 3, which can save resources and expand the application range of the guide and drill bits with different diameters.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bone drill guide, comprising a tubular fixed guide sleeve (1), wherein the upper outer edge of the fixed guide sleeve (1) is fixedly connected to a handle (2), characterized in that: A tubular sliding guide sleeve (3) is sleeved in the fixed guide sleeve (1), a rod-shaped core rod (6) is sleeved in the sliding guide sleeve (3), and a spike portion (62) is provided at the lower end of the core rod (6); a positioning portion (11) for abutting against bone tissue is provided at the lower end of the fixed guide sleeve (1); The positioning portion (11) is a wedge-shaped block that gradually narrows from top to bottom, and the two side surfaces of the wedge-shaped block are symmetrically arranged along the diameter direction of the fixed guide sleeve (1); The sliding guide sleeve (3) comprises a first sliding guide sleeve (4) and a second sliding guide sleeve (5); the first sliding guide sleeve (4) is sleeved inside the fixed guide sleeve (1), the second sliding guide sleeve (5) is sleeved inside the first sliding guide sleeve (4), and the core rod (6) is sleeved inside the second sliding guide sleeve (5).

2. The bone drill guide according to claim 1, characterized in that: The two side surfaces of the wedge block intersect on the diameter of the fixed guide sleeve (1), and the angle between the two side surfaces of the wedge block is α, which is 50°-70°.

3. The bone drill guide according to claim 1, characterized in that: The lengths of the fixed guide sleeve (1), the first sliding guide sleeve (4), the second sliding guide sleeve (5) and the core rod (6) increase in sequence.

4. The bone drill guide according to claim 1, characterized in that: The lower ends of the first sliding guide sleeve (4) and the second sliding guide sleeve (5) are both provided with chamfers, and the upper ends of the first sliding guide sleeve (4) and the second sliding guide sleeve (5) are both provided with outwardly protruding retaining rings (7).

5. The bone drill guide according to claim 1, characterized in that: The core rod (6) comprises a core rod body (61), a push-pull handle (63) is provided at the upper end of the core rod body (61), a limit block (64) protruding outward is provided on the core rod body (61) at the lower end of the push-pull handle (63), and the spike portion (62) is arranged at the lower end of the core rod body (61); the core rod body (61), the spike portion (62), the limit block (64) and the push-pull handle (63) are integrally formed.

6. The bone drill guide according to claim 1 or 5, characterized in that: The spike portion (62) is a cone.

7. The bone drill guide according to claim 1, characterized in that: The included angle between the length direction of the handle (2) and the axial direction of the fixed guide sleeve (1) is β, and β is 100°-120°.

8. The bone drill guide according to claim 1, characterized in that: The fixed guide sleeve (1), the first sliding guide sleeve (4), the second sliding guide sleeve (5) and the core rod (6) are all made of stainless steel.

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