Three-dimensional positioning and guiding reduction internal fixator for coracoid process fracture under elbow arthroscope

Abstract

The invention belongs to the technical field of medical surgical instruments, and particularly relates to an elbow arthroscopic coronary process fracture three-dimensional positioning and guiding reduction internal fixator which comprises a reduction positioning arm, a sleeve is rotationally connected to the reduction positioning arm in a sleeving mode, a fixing arm is arranged at the lower end of the outer wall of the sleeve, an outer sleeve is arranged at one end of the fixing arm, and the other end of the fixing arm is provided with an inner sleeve. An inner sleeve is arranged in the outer sleeve, a first guide pin is slidably connected in the inner sleeve in a sleeved mode, a second guide pin is slidably connected in the inner sleeve in a sleeved mode, a third guide pin is slidably arranged in the inner sleeve, and a positioning block is arranged at one end of the reset positioning arm. According to the bone fracture reduction device, fracture reduction can be better achieved, positioning is easier, the operation mode is simplified, and the operation time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of medical surgical instruments, and specifically refers to a three-dimensional positioning, guiding, reducing and internal fixator for coronoid fracture under elbow arthroscopy. Background Art

[0002] Coronoid fracture is a type of elbow injury, which is mostly caused by direct rigid compression such as collision and fall. Since the fracture site of the coronoid is located at the elbow joint, its internal soft tissue structure is relatively complex. When the degree of fracture is large, a large surgical incision is required to reduce the fracture site and cooperate with internal fixation to restore the joint alignment. However, this traditional method causes great damage to the soft tissue around the elbow joint and slow postoperative recovery. With the improvement of medical equipment and the rapid development of arthroscopic technology in recent years, elbow arthroscopy has gradually been promoted in clinical practice. Through elbow arthroscopy monitoring and reduction, the coronoid fracture site is effectively fixed directly using Kirschner wires. Compared with traditional methods, it has the advantages of small wound, short postoperative recovery period, and small postoperative scar surface. However, in elbow arthroscopy, accurate guidance of Kirschner wires has always been a major problem in this field. At present, some positioning sights in the existing technology are not flexible enough and inconvenient to install and match, which greatly increases the difficulty of surgery.

[0003] When reducing and fixing coronoid fractures under elbow arthroscopy, the most commonly used method is to use a cruciate ligament tibial locator to assist in positioning, and use a Kirschner needle to perform percutaneous fixation on the fracture ends. The main problems with the unsatisfactory effect of using a cruciate ligament tibial locator during the reduction of a coronoid fracture under elbow arthroscopy are that the cruciate ligament tibial locator is a point-to-point design concept of a single plane, and is mainly used to locate the insertion point of the cruciate tibial ligament of the knee joint. The elbow arthroscopic approach to ulnar coronoid fractures is generally with the elbow flexed 90° and the forearm naturally hanging down, close to the anterior medial and anterolateral sides of the elbow joint, as well as the complex anatomical structure of the elbow joint and the irregular anatomical morphology of the ulnar coronoid process. Therefore, the single-point cruciate ligament tibial locator is significantly limited in terms of three-dimensional precise positioning, reduction and stable holding force, as well as the arbitrary selection of the locator's annular angle. The guide needle is easy to enter the elbow joint cavity, affecting postoperative functional exercises and the stability of bone fixation, and ultimately unable to adapt to and meet this special and complex situation. In addition, due to the small fracture fragments of the ulnar coronoid fracture, there is no good instrument to assist in precise positioning and reduction during the fixation process. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a three-dimensional positioning guiding reduction internal fixator for coronoid fracture under elbow arthroscopy.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a three-dimensional positioning guiding reduction internal fixator for coronoid fracture under elbow arthroscopy, including a reduction and positioning arm, a sleeve rotatably connected on the reduction and positioning arm, a fixing arm is provided at the lower end of the outer wall of the sleeve, an outer sleeve is provided at one end of the fixing arm, an inner sleeve is provided in the outer sleeve, a guide pin 1 is slidably connected in the inner sleeve, a guide pin 2 is slidably connected in the inner sleeve, a guide pin 3 is slidably provided in the inner sleeve, and a positioning block is provided at one end of the reduction and positioning arm.

[0006] Furthermore, a first positioning hole is formed on the positioning block, a second positioning hole is formed on the positioning block, and a third positioning hole is formed on the positioning block.

[0007] Furthermore, guide needle one is slidably sleeved in the positioning hole one, guide needle two is slidably sleeved in the positioning hole two, and positioning hole three is slidably sleeved in the positioning hole three.

[0008] Furthermore, the sleeve is provided with a fixing bolt, and the fixing bolt and the sleeve are threadedly connected.

[0009] Furthermore, the resetting and positioning arm and the fixing arm are both made of stainless steel.

[0010] Furthermore, the guide needle one, the guide needle two, and the guide needle three are all made of stainless steel.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: The present application can better reduce the fracture and make it easier to position, thereby simplifying the surgical method and speeding up the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0013] Figure 1 This is a front view of a three-dimensional positioning, guiding, reducing and internal fixator for coronoid fracture under elbow arthroscopy of the present invention; Figure 2 It is a right side cross-sectional view of a three-dimensional positioning, guiding, reducing and internal fixator for coronoid fracture under elbow arthroscopy of the present invention; Figure 3 This is a top view of the positioning block.

[0014] Among them, 1. reset positioning arm, 2. fixed arm, 3. inner sleeve, 4. outer sleeve, 5. guide needle one, 6. guide needle two, 7. guide needle three, 8. positioning block, 9. fixing bolt, 10. sleeve, 11. positioning hole one, 12. positioning hole two, 13. positioning hole three. DETAILED DESCRIPTION

[0015] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0016] like Figure 1-Figure 3 As shown, the present invention proposes a three-dimensional positioning guiding reduction internal fixator for coronoid fracture under elbow arthroscopy, including a reduction and positioning arm 1, a sleeve 10 is rotatably sleeved on the reduction and positioning arm 1, and the sleeve 10 is provided with a fixing bolt 9, which is threadedly connected to the sleeve 10, and a fixing arm 2 is provided at the lower end of the outer wall of the sleeve 10, and one end of the fixed arm 2 is provided with an outer sleeve 4, and an inner sleeve 3 is provided in the outer sleeve 4, and a guide pin 1 5 is slidably sleeved in the inner sleeve 3, and a guide pin 2 6 is slidably sleeved in the inner sleeve 3, and a guide pin 3 7 is slidably provided in the inner sleeve 3, and a positioning block 8 is provided at one end of the reduction and positioning arm 1, and a positioning hole 11 is provided on the positioning block 8, a positioning hole 2 12 is provided on the positioning block 8, and a positioning hole 3 13 is provided on the positioning block 8, a guide pin 1 5 is slidably sleeved in the positioning hole 11, a guide pin 2 6 is slidably sleeved in the positioning hole 2 12, and a positioning hole 3 13 is slidably sleeved in the positioning hole 13.

[0017] The resetting and positioning arm 1 and the fixing arm 2 are both made of stainless steel.

[0018] The guide needle 1 5 , the guide needle 2 6 , and the guide needle 3 7 are all made of stainless steel.

[0019] The included angle between the guide needle 5 and the positioning block 8 is 45°-60°.

[0020] The included angle between the guide needle 2 6 and the positioning block 8 is 45°-60°.

[0021] The included angle between the guide needle 3 7 and the positioning block 8 is 45°-60°.

[0022] During specific use, the positioning block 8 is attached to the coronoid process fracture site, and the fixing arm 2 is rotated. The rotation of the fixing arm 2 drives the outer sleeve 4 to rotate, and the rotation of the outer sleeve 4 drives the inner sleeve 3 to rotate. The rotation of the inner sleeve 3 drives the guide needle 1 5, the guide needle 2 6, and the guide needle 3 7 to rotate, so that the guide needle 1 5 is aligned with the positioning hole 11, the guide needle 2 6 is aligned with the positioning hole 2 12, and the guide needle 3 7 is aligned with the positioning hole 3 13. The fixing bolt 9 is rotated to fix the sleeve 10 on the resetting positioning arm 1, and then the guide needle 1 5, the guide needle 2 6, and the guide needle 3 7 are inserted into the coronoid process fracture site to complete the fixation. The above is the overall working process of the present invention. Just repeat this step when you use it next time.

[0023] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-dimensional positioning, guiding, reduction and internal fixator for coronoid fracture under elbow arthroscopy, characterized in that: The invention comprises a reset positioning arm (1), a sleeve (10) being rotatably sleeved on the reset positioning arm (1), a fixed arm (2) being provided at the lower end of the outer wall of the sleeve (10), an outer sleeve (4) being provided at one end of the fixed arm (2), an inner sleeve (3) being provided inside the outer sleeve (4), a guide needle 1 (5) being slidably sleeved inside the inner sleeve (3), a guide needle 2 (6) being slidably sleeved inside the inner sleeve (3), a guide needle 3 (7) being slidably provided inside the inner sleeve (3), and a positioning block (8) being provided at one end of the reset positioning arm (1).

2. The three-dimensional positioning, guiding, reduction and internal fixation device for coronoid fracture under elbow arthroscopy according to claim 1, characterized in that: The positioning block (8) has a first positioning hole (11), the positioning block (8) has a second positioning hole (12), and the positioning block (8) has a third positioning hole (13).

3. The three-dimensional positioning, guiding, reduction and internal fixation device for coronoid fracture under elbow arthroscopy according to claim 2, characterized in that: The first positioning hole (11) is slidably sleeved with a guide needle (5), the second positioning hole (12) is slidably sleeved with a guide needle (6), and the third positioning hole (13) is slidably sleeved with a positioning hole (13).

4. The three-dimensional positioning, guiding, reduction and internal fixation device for coronoid fracture under elbow arthroscopy according to claim 3, characterized in that: The sleeve (10) is provided with a fixing bolt (9), and the fixing bolt (9) and the sleeve (10) are threadedly connected.

5. The three-dimensional positioning, guiding, reduction and internal fixator for coronoid fracture under elbow arthroscopy according to claim 4, characterized in that: The resetting and positioning arm (1) and the fixing arm (2) are both made of stainless steel.

6. The three-dimensional positioning, guiding, reduction and internal fixator for coronoid fracture under elbow arthroscopy according to claim 5, characterized in that: The guide needle 1 (5), the guide needle 2 (6) and the guide needle 3 (7) are all made of stainless steel.

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