A medical bone depth gauge and its usage method

Abstract

The present invention relates to a medical bone depth gauge, which includes a depth gauge main body, a scale plate, a return hook claw, a push rod and a pulling rope. The depth gauge main body is sleeved outside the scale plate. A sliding groove is provided on the depth gauge main body. One end of the scale plate is set as a scale, and the other end of the scale plate is set as a needle rod. The inside of the needle rod is hollow. The end of the needle rod is movably connected to the return hook claw. The pulling rope passes through the inside of the needle rod. One end of the pulling rope is connected to the push rod, and the other end of the pulling rope is connected to the return hook claw. A push rod hole is provided in the middle of the scale plate. The push rod sequentially passes through the sliding groove and the push rod hole and is movably connected to the scale plate. The medical bone depth gauge of the present invention is more convenient to operate, and a doctor can complete the bone depth measurement operation with one hand.

Description

Technical Field

[0001] This invention patent relates to an orthopedic medical device, and particularly to a medical bone depth gauge and its usage method. Background Art

[0002] Currently, the main method for measuring bone thickness is the traditional medical bone depth gauge, which is generally a needle with a hook at the head. It passes through the bottom hole implanted with a screw, penetrates the cortical layers on both sides of the bone, and hooks the opposite cortical layer with the hook part to achieve the fixation purpose, thereby conducting depth measurement.

[0003] The traditional medical bone depth gauge has the following problems and disadvantages: 1. The above-mentioned depth gauge extends into the pre-drilled bottom hole on the bone surface through the soft tissue incision, and the direction of the hook is not easy to accurately judge. There is a high probability that it needs to be hooked multiple times but fails to hook, thus greatly reducing the efficiency of depth measurement; 2. Doctors need to operate the depth gauge with both hands simultaneously to complete the measurement, which is inconvenient to use.

[0004] An orthopedic depth gauge disclosed in Patent CN 207693571 U has a bent structure integrally arranged at the end of its needle head. This kind of structure requires a larger pre-drilled hole on the bone surface, causing greater trauma to the patient and being unfavorable for later recovery. When operating this depth gauge, both hands need to be used simultaneously, which is not conducive to operation.

[0005] A probe and a depth gauge used in orthopedic surgery disclosed in Patent CN 208973856 U achieve the rebound of the probe head by pulling out the sleeve structure, which can correspondingly reduce the size of the pre-drilled hole on the bone surface. However, the cross-section of its probe needle head is larger than that of its needle rod, that is, the pre-drilled hole on the bone surface is still relatively large, and both hands need to be used simultaneously during operation, which is not conducive to operation. Summary of the Invention

[0006] Object of the Invention:

[0007] This invention patent provides a medical bone depth gauge and its usage method, aiming to provide a depth gauge that enables doctors to quickly and accurately detect the bone distance during orthopedic surgery with one hand.

[0008] Technical Solution:

[0009] A medical bone depth gauge, which includes a depth gauge main body, a scale plate, a return hook claw, a push rod, and a pulling rope. The depth gauge main body is sleeved outside the scale plate. A sliding groove is provided on the depth gauge main body. One end of the scale plate is set as a scale, and the other end is set as a needle rod. The inside of the needle rod is hollow. The end of the needle rod is movably connected to the return hook claw. The pulling rope passes through the inside of the needle rod. One end of the pulling rope is connected to the push rod, and the other end is connected to the return hook claw. A push rod hole is provided in the middle of the scale plate. The push rod sequentially passes through the sliding groove and the push rod hole and is movably connected to the scale plate.

[0010] The bottom end of the back hook claw is provided with a back hook claw shaft, and the back hook claw shaft is connected to the scale board shaft at the end of the scale board.

[0011] The end of the back hook claw is of a gradually thinning structure, and the width of the back hook claw is smaller than the width of the needle rod.

[0012] When the push rod is perpendicular to the scale board, the push rod protrudes from the sliding groove.

[0013] A push button is fixedly arranged at the end of the push rod away from the scale board.

[0014] The width of the push button is greater than the width of the sliding groove.

[0015] The end with a smaller scale of the scale is connected to the push rod hole.

[0016] The pulling rope is made of steel wire.

[0017] The length of the sliding groove is the length that the needle rod can extend.

[0018] A using method of a medical bone depth gauge. First, push down the push button 7, and put the back hook claw 3 in the horizontal state into the drilled bone hole until it penetrates the second cortical layer. Secondly, press the push button 7 and then push it up. The back hook claw 3 changes from the horizontal state to the vertical state and hooks the bone. Finally, the scale on the scale 2-1 can be read.

[0019] Advantages and effects:

[0020] 1. The operation of the medical bone depth gauge of the present invention is more convenient, and a doctor can complete the bone depth measurement operation with one hand;

[0021] 2. The medical bone depth gauge of the present invention causes less damage to the bone hole channel, which is beneficial to the recovery of patients;

[0022] 3. The design of the back hook claw of the medical bone depth gauge of the present invention improves the operation accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of the medical bone depth gauge;

[0024] Figure 2 is a perspective view of the medical bone depth gauge before use;

[0025] Figure 3 is a longitudinal perspective view of the medical bone depth gauge before use;

[0026] Figure 4 is a perspective view of the medical bone depth gauge in the use state;

[0027] Figure 5 is a longitudinal perspective view of the medical bone depth gauge in the use state;

[0028] Figure 6 is an exploded view of the enlarged structure of the end of the anchor rod;

[0029] In the figure, 1. sounding ruler main body, 1-1. sliding groove, 2. scale plate, 2-1. scale, 2-2. push rod hole, 2-3. anchor rod, 2-4. groove, 2-5. shaft plate, 3. return hook claw, 4. return hook claw shaft, 5. inner shaft of the push rod, 6. push rod, 7. push button, 8. upper shaft of the push rod, 9. scale plate shaft, 10. steel wire. Specific embodiments

[0030] The present invention will be better described below with reference to the accompanying drawings.

[0031] As Figures 1-5 shown, a medical bone sounding ruler includes a sounding ruler main body 1, a scale plate 2, a return hook claw 3, a push rod 6 and a pulling rope 10. The sounding ruler main body 1 is sleeved outside the scale plate 2. A sliding groove 1-1 is provided on the sounding ruler main body 1. One end of the scale plate 2 is provided as a scale 2-1, and the other end of the scale plate 2 is provided as an anchor rod 2-3. The inside of the anchor rod 2-3 is hollow. The end of the anchor rod 2-3 is movably connected to the return hook claw 3 through a scale plate shaft 9. A push rod hole 2-2 is provided in the middle of the scale plate 2. The push rod 6 sequentially passes through the sliding groove 1-1 and the push rod hole 2-2 and is movably connected to the shaft plate 2-5 of the scale plate 2 through an inner shaft 5 of the push rod. One end of the pulling rope 10 is connected to the push rod 6, and the other end of the pulling rope 10 is connected to the return hook claw 3.

[0032] A return hook claw shaft 4 is integrally provided at the bottom end of the return hook claw 3. The return hook claw shaft 4 is connected to the end of the scale plate 2. The return hook claw shaft 4 is sleeved on the scale plate shaft 9, and the return hook claw 3 can rotate around the scale plate shaft 9. When the pulling rope 10 is pulled, the pulling rope 10 will pull the return hook claw 3 from a horizontal state to a vertical state. The end of the return hook claw 3 is tapered, that is, similar to a blade structure, which is convenient for insertion and fixation. And the width of the return hook claw 3 is smaller than the width of the anchor rod 2-3, that is, the return hook claw 3 does not affect the size of the bone hole, and the bone hole only needs to meet the width of the anchor rod 2-3.

[0033] The connection method of the pulling rope 10 with the push rod 6 and the return hook claw 3 can be any existing connection method, such as gluing, bundling, tying, threading and other existing methods. As Figure 6 shown, a groove 2-4 for fixing the scale plate shaft 9 is provided at the end of the anchor rod 2-3. The groove 2-4 structure protrudes from the end face of the anchor rod 2-3. The groove 2-4 structure occupies about half of the end face of the anchor rod 2-3. When the return hook claw 3 is in a horizontal state, the return hook claw 3 contacts the groove 2-4. When the pulling rope 10 pulls the return hook claw 3, when the return hook claw 3 touches the end face of the anchor rod 2-3, the return hook claw 3 is in a vertical state and is perpendicular to the groove 2-4.

[0034] The end with a smaller scale of the scale 2-1 is connected to the push rod hole 2-2.

[0035] When the push rod 6 is perpendicular to the scale plate 2, the push rod 6 protrudes from the sliding groove 1-1. The height of the push rod 6 protruding from the sliding groove 1-1 is about 3 mm - 5 mm.

[0036] A push button 7 may be fixedly provided at the end of the push rod 6 away from the scale plate 2. The push rod 6 and the push button 7 are fixedly connected by a push rod upper shaft 8, which facilitates pressing down the push rod 6 and pushing the scale plate 2. Alternatively, the end of the push rod 6 away from the scale plate 2 may be provided with a structure having a width greater than the width of the sliding groove 1-1, that is, the push rod 6 and the push button 7 are of an integral structure.

[0037] Pressing the push rod 6 or the push button 7 will cause the push rod 6, which was originally perpendicular to the scale plate 2, to tilt. Since the push rod 6 is fixed on the shaft plate 2-5 as shown in Figure 5 the push rod 6 will only tilt upward. The width of the push rod hole 2-2 limits the degree of tilt of the push rod 6. The tilt of the push rod 6 will pull the pulling rope 10 upward, and then pull the return hook 3 from the horizontal state to the vertical state.

[0038] The width of the push button 7 is greater than the width of the sliding groove 1-1. One end of the push rod 6 away from the scale plate 2 or the push button 7 may be provided in various shapes, such as circular, square or rectangular, etc. Alternatively, on the surface in contact with the operator's thumb, it may be provided with an anti-slip surface, and the anti-slip surface may be a structure with unevenness, such as uneven stripes and other structures.

[0039] The pulling rope 10 is made of steel wire. Or other alloy wires having the same function as the steel wire.

[0040] The length of the sliding groove 1-1 is the length that the needle rod 2-3 can extend.

[0041] The end of the scale 2-1 with a larger scale is set to be bent. The scale plate 2 can be reset by pushing the push button 7 or pulling the scale 2-1. When the method of pulling the scale 2-1 is adopted, the bent shape is convenient for pulling.

[0042] The opening at one end of the sounding ruler main body 1 matches the outer contour of the scale 2-1, and the opening at the other end of the sounding ruler main body 1 matches the outer contour of the needle rod 2-3. The sounding ruler main body 1 can be of an integral structure or a combined body.

[0043] As Figures 1-5 shown, the assembly process of the medical bone sounding ruler

[0044] First, pass the inner shaft 5 of the push rod through the push rod 6, and then fix and connect the inner shaft 5 of the push rod to the shaft plate 2-5 of the scale plate 2 with two-component epoxy resin glue or other materials. The push rod 6 can rotate around the inner shaft 5 of the push rod. Then, insert the scale plate 2 into the depth gauge main body 1 from bottom to top. Next, pass the scale plate shaft 9 through the return hook shaft 4, and fix and bond the return hook shaft 4 and the return hook 3 respectively with two-component epoxy resin or other materials, and fix and bond the scale plate shaft 9 and the scale plate 2. The return hook shaft 4 and the return hook 3 can also be integrally arranged. At this time, the return hook 3 can rotate around the scale plate shaft 9. Subsequently, pass the upper shaft 8 of the push rod through the push rod 6 and the push button 7, and fix and bond the upper shaft 8 of the push rod and the push button 7 with two-component epoxy resin glue or other materials. The upper shaft 8 of the push rod and the push button 7 can also be an integral structure. One end of the pulling rope 10 is connected to the middle and lower part of the push rod 6, and the other end of the pulling rope 10 passes through the inside of the depth gauge main body 1 and the needle rod 2-3 and is fixedly connected to the return hook 3 to complete the installation.

[0045] The user first places the horizontally placed return hook 3 into the drilled bone hole, and then pushes the push button 7. By observing the scale plate, the depth of the bone hole can be known. This bone depth gauge is convenient to operate, and the user can complete the bone depth measurement operation with one hand.

[0046] A method for using a medical bone depth gauge. The specific operation process is that the user first places the horizontally placed return hook 3 into the drilled bone hole, as Figures 2-3 shown, push the push button 7 downward along the sliding groove 1-1 until it penetrates the second cortical layer. At this time, press the push button 7, as Figures 4-5 shown, the push rod 6 inclines, pull the pulling rope 10, and the pulling rope 10 pulls the return hook 3 to change from the horizontal state to the vertical state. Push the push button 7 upward until it hooks the bone, then the push button 7 cannot be pushed. At this time, the scale on the scale 2-1 can be read to obtain the depth of the bone hole. The structure of the return hook 3 improves the operation accuracy and efficiency, and avoids the problem of large bone holes caused by the bending structure (hook structure) of the existing probe structure, as well as the situation where the probe hook cannot be hooked multiple times and the problems of low accuracy and low efficiency. When taking it out, do not press the push button 7, just push the push button 7 upward, or the push button 7 can be released and the scale 2-1 can be directly pulled out.

Claims

1. A medical bone depth gauge, characterized in that: The depth gauge includes a depth gauge body (1), a scale plate (2), a return hook claw (3), a push rod (6) and a pulling rope (10). The depth gauge body (1) is sleeved outside the scale plate (2). A sliding groove (1-1) is provided on the depth gauge body (1). One end of the scale plate (2) is set as a scale (2-1), and the other end of the scale plate (2) is set as a needle rod (2-3). The inside of the needle rod (2-3) is hollow. The end of the needle rod (2-3) is movably connected to the return hook claw (3). The pulling rope (10) passes through the inside of the needle rod (2-3). One end of the pulling rope (10) is connected to the push rod (6), and the other end of the pulling rope (10) is connected to the return hook claw (3). A push rod hole (2-2) is provided in the middle of the scale plate (2). The push rod (6) sequentially passes through the sliding groove (1-1) and the push rod hole (2-2) and is movably connected to the shaft plate (2-5) of the scale plate (2) through a push rod inner shaft (5); The end of the return hook claw (3) has a gradually thinning structure, and the width of the return hook claw (3) is smaller than the width of the needle rod (2-3); When the push rod (6) is perpendicular to the scale plate (2), the push rod (6) protrudes from the sliding groove (1-1); A push button (7) is fixedly provided at the end of the push rod (6) away from the scale plate (2); The width of the push button (7) is greater than the width of the sliding groove (1-1).

2. The medical bone depth gauge according to claim 1, characterized in that: A return hook shaft (4) is provided at the bottom end of the return hook claw (3), and the return hook shaft (4) is shaft-connected to the scale plate shaft (9) at the end of the scale plate (2).

3. The medical bone depth gauge according to claim 1, wherein: The end with a smaller scale of the scale (2-1) is connected to the push rod hole (2-2).

4. The medical bone depth gauge according to claim 1, characterized in that: The pulling rope (10) is made of steel wire.

5. The medical bone depth gauge according to claim 1, characterized in that: The length of the sliding groove (1-1) is the length that the needle rod (2-3) can extend.

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