Orthopedic positioning needle capable of measuring depth

Abstract

The utility model relates to the technical field of medical auxiliary instruments, in particular to an orthopaedic positioning needle capable of measuring depth, which comprises a positioning needle body and a measuring probe, an inner hole is arranged in the middle of the positioning needle body, the measuring probe is connected with the positioning needle body through the inner hole, four groups of observation windows are arranged on the outer ring of the positioning needle body, and the observation windows are connected with the positioning needle body through the inner hole. A transparent PC shell is installed in the observation window, an anti-skid groove is formed in the cross section of the observation window, the cross section of an inner hole of the transparent PC shell is an arc, the cross section of an outer circle of the transparent PC shell is an arc, and a triangular boss is arranged on the surface of the transparent PC shell. According to the utility model, the depth can be measured without taking out the positioning needle after the positioning needle is drilled into the bone in the orthopedic operation process, and a brand-new measurement mode is adopted, so that the measurement does not depend on the traditional hook to hook the opposite cortical bone.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically a depth-measuring orthopedic positioning needle. Background Technology

[0002] In orthopedic trauma, spine, and joint surgeries, orthopedic positioning pins are an important tool in the surgical process. They can be implanted into the human body as internal fixation consumables or as auxiliary instruments for other internal fixation consumables. When in use, the orthopedic positioning pin is clamped on a power tool, and the high-speed rotation of the power tool and the pushing force actively applied by the doctor drive the orthopedic positioning pin into the bone.

[0003] Orthopedic positioning pins are frequently used in surgeries requiring the installation of cannulated bone screws. During the surgery, the orthopedic positioning pin is first inserted into the bone at the location where the cannulated screw will be installed. If the positioning pin does not penetrate the contralateral cortical bone, it does not need to be removed; instead, an integrated depth gauge is used to measure the depth of the positioning pin within the bone in order to select a cannulated screw of appropriate length. If the positioning pin penetrates the contralateral cortical bone, it needs to be removed, and a combination depth gauge is used to measure the depth of the positioning pin within the bone.

[0004] The existing technology still has the following drawbacks in its use:

[0005] 1. In the existing technology, the use of a combined depth sounder to measure depth requires the removal of the positioning pin. Re-inserting the positioning pin after measurement will reduce the friction between the positioning pin and the bone, making it unstable and easy for the positioning pin to slip off during subsequent operations.

[0006] 2. In the existing technology, the use of a combined depth sounder to measure depth requires the small hook at the front of the depth sounder probe to hook onto the opposite cortical bone in order to obtain an accurate depth. Due to size limitations, it is difficult to design the small hook to be large enough, which often results in the inability to hook onto the opposite cortical bone for measurement in actual use, which is very time-consuming.

[0007] 3. Existing combined depth sounders have complex structures, numerous parts, and high processing costs;

[0008] 4. In the existing technology, the surgical instrument kit, even with the presence of a positioning pin, still requires a separate depth measuring device, resulting in a large number of instruments, complex surgical procedures, and increased costs.

[0009] In light of this, we propose a depth-measuring orthopedic positioning needle to address the existing problems. Utility Model Content

[0010] The purpose of this invention is to provide a depth-measuring orthopedic positioning needle to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a depth-measuring orthopedic positioning needle, comprising a positioning needle body and a probing probe. The positioning needle body has an inner hole in the middle, and the probing probe is connected to the positioning needle body through the inner hole. The outer ring of the positioning needle body has four sets of observation windows, and a transparent PC shell is installed inside the observation windows. The transparent PC shell prevents the positioning needle from getting stuck when drilling into the bone, and also facilitates observation of the laser markings on the depth-measuring probe during depth measurement. The cross-section of the observation window has an anti-slip groove. The cross-section of the inner hole of the transparent PC shell is arc-shaped, and the arc design of the inner hole cross-section facilitates smooth sliding of the depth-measuring probe within the inner hole of the needle body without getting stuck. The outer circular cross-section of the transparent PC shell is arc-shaped, and the arc design of the outer circular cross-section improves the consistency of the outer surface of the positioning needle and the comfort during use. The surface of the transparent PC shell is provided with a triangular protrusion, which increases the firmness of the connection with the positioning needle and makes it less likely to slip off.

[0012] Preferably, the observation window has rounded corners at both ends.

[0013] Preferably, the positioning needle body has a rear end face at the rear end, the rear end face of the needle body has rounded corners, and the positioning needle body has a needle tip at the front end.

[0014] Preferably, the probe has a probe front face at its front end, a probe handle at its rear end, and multiple sets of readings are equidistantly arranged in the middle of the probe.

[0015] Preferably, the probe tip is provided with a white laser mark, and the front end of the white laser mark is rounded.

[0016] Preferably, the probe handle has a patterned surface, the front and rear ends of the probe handle are chamfered, the front end of the probe handle has a notch, the notch at the front end of the probe handle is rounded, and a step is formed on the diameter of the probe and the positioning needle.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In orthopedic surgery, the depth can be measured without removing the positioning needle after it has been drilled into the bone.

[0019] 2. This utility model adopts a completely new measurement method, which no longer relies on the traditional method of hooking the opposite cortical bone for measurement.

[0020] 3. This utility model has a simple structure, few parts, and low processing cost.

[0021] 4. With the addition of a positioning pin, the surgical instrument pack of this invention eliminates the need for a separate depth measuring device, simplifying surgical procedures and reducing the cost of the instrument pack. Attached Figure Description

[0022] Figure 1 This is a front view of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the front structure of the probe of this utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the observation window of this utility model;

[0025] Figure 4 This is a cross-sectional schematic diagram of the transparent PC shell of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure at point A of this utility model.

[0027] In the diagram: 1. Positioning needle body; 2. Probe; 3. Needle tip; 4. Observation window; 5. Transparent PC shell; 6. Rear end face of the needle body; 7. Probe handle; 8. Anti-slip groove; 9. Triangular boss; 10. Front end face of the probe; 11. Reading; 12. Notch. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figures 1-5 As shown, the present invention proposes a depth-measuring orthopedic positioning needle. By setting an observation window with a central hole in the traditional orthopedic positioning needle and using a depth-measuring probe, the orthopedic positioning needle has a self-depth-measuring function, eliminating the need for an additional depth meter to assist in depth measurement. Moreover, the depth-measuring principle is reliable and easy to use, greatly simplifying the instrument configuration in the surgical instrument pack.

[0031] A depth-measuring orthopedic positioning needle includes a positioning needle body and a probing probe. The positioning needle body has an inner hole in the middle, through which the probing probe connects to the positioning needle body. Four sets of observation windows are provided on the outer ring of the positioning needle body. A transparent PC shell is installed inside each observation window. The transparent PC shell prevents the positioning needle from getting stuck when drilling into the bone and also facilitates observation of the laser markings on the depth-measuring probe during depth measurement. Anti-slip grooves are provided within the cross-section of the observation windows; these grooves prevent slippage between the transparent PC shell and the observation windows. The inner hole of the transparent PC shell has an arc-shaped cross-section, which allows the depth-measuring probe to slide smoothly within the inner hole of the needle body without getting stuck. The outer circumference of the transparent PC shell also has an arc-shaped cross-section, which improves the consistency of the positioning needle's outer surface and enhances user comfort. Triangular bosses are provided on the surface of the transparent PC shell, increasing the firmness of the connection with the positioning needle and preventing slippage.

[0032] Furthermore, the observation window has rounded corners at both ends, which facilitates manufacturing.

[0033] Furthermore, the positioning needle body has a rear end face at the rear end, which is rounded. The rounded corner design can improve the comfort during use. The positioning needle body also has a needle tip at the front end.

[0034] Furthermore, the probe has a probe front face at the front end and a probe handle at the rear end. The probe handle is easy to hold, and multiple sets of readings are equidistantly arranged in the middle of the probe for easy depth observation.

[0035] Furthermore, the probe tip is marked with a white laser mark, which makes it easy to observe whether the probe tip is flush with the bone surface. The white laser mark has rounded corners, which makes it easy for the probe to slide smoothly in the needle body without getting stuck.

[0036] Furthermore, the probe handle has a textured surface, which increases friction with the hand for easier operation. The front and rear ends of the probe handle are chamfered, which facilitates machining and improves comfort during use. The front end of the probe handle has a notch, which allows the initial scale to be displayed in the initial position. The notch on the front end of the probe handle is rounded, which facilitates machining. Steps are formed on the diameter of the probe and the positioning needle. This design prevents the power tool from clamping the positioning needle on the outer surface of the depth sounding probe.

[0037] The working principle of the depth-measuring orthopedic positioning needle based on Embodiment 1 is as follows: By setting an observation window through a central opening in a traditional orthopedic positioning needle, combined with a depth-measuring probe, the orthopedic positioning needle gains a self-depth-measuring function. In the initial state of the orthopedic positioning needle, the distance between the front end of the depth-measuring probe and the needle tip is mm. At this time, the reading at the intersection of the rear end of the needle body and the depth-measuring probe is [value missing]. After the orthopedic positioning needle has penetrated into the bone to a certain depth, the depth-measuring probe is slowly moved backward while holding the handle. Observing through the transparent PC shell, when the white mark on the front end of the depth-measuring probe is flush with the bone surface, the reading at the intersection of the rear end of the needle body and the depth-measuring probe is the depth of the orthopedic positioning needle penetrating into the bone.

[0038] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A depth-measuring orthopedic positioning needle, comprising a positioning needle body (1) and a probing probe (2), characterized in that: The positioning needle body (1) has an inner hole in the middle. The probe (2) is connected to the positioning needle body (1) through the inner hole. The positioning needle body (1) has four sets of observation windows (4) on its outer ring. A transparent PC shell (5) is installed inside the observation window (4). The transparent PC shell (5) prevents the positioning needle from getting stuck when drilling into the bone. It also makes it easy to observe the laser marking of the probe (2) when measuring depth. The observation window (4) has an anti-slip groove (8) in its cross-section. The inner hole of the transparent PC shell (5) has an arc cross-section. The arc design of the inner hole cross-section makes it easy for the depth measuring probe to slide smoothly in the inner hole of the needle without getting stuck. The outer circle cross-section of the transparent PC shell (5) has an arc cross-section. The arc design of the outer circle cross-section improves the consistency of the outer surface of the positioning needle and the comfort during use. The surface of the transparent PC shell (5) has a triangular boss (9). The triangular boss (9) increases the firmness of the connection with the positioning needle and makes it less likely to slip.

2. The depth-measuring orthopedic positioning needle according to claim 1, characterized in that: The observation window (4) has rounded corners at both ends.

3. The depth-measuring orthopedic positioning needle according to claim 1, characterized in that: The positioning needle body (1) has a needle body rear end face (6) at its rear end, the needle body rear end face (6) has rounded corners, and the positioning needle body (1) has a needle body tip (3) at its front end.

4. The depth-measuring orthopedic positioning needle according to claim 1, characterized in that: The probe (2) has a probe front face (10) at its front end and a probe handle (7) at its rear end. Multiple sets of readings (11) are equidistantly arranged in the middle of the probe (2).

5. The depth-measuring orthopedic positioning needle according to claim 4, characterized in that: The probe tip face (10) is provided with a white laser mark, and the front end of the white laser mark is rounded.

6. The depth-measuring orthopedic positioning needle according to claim 4, characterized in that: The probe handle (7) has a pattern on its surface. The front and rear ends of the probe handle (7) are chamfered. The front end of the probe handle (7) has a notch (12). The notch (12) on the front end of the probe handle (7) is rounded. The probe (2) and the positioning needle body (1) form a step on their diameters.

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