Steerable adjusting guide needle for guiding in bone fracture end intramedullary needle

Abstract

The utility model discloses a steerable adjusting guide needle for guiding in an intramedullary needle at a fracture end, and aims to solve the technical problems that a guide needle in the prior art is straight, the corresponding needle inserting direction cannot be adjusted according to the direction of the fracture end, and the guide needle cannot pass through the fracture far end. The medical instrument comprises a guide needle head, a guide needle body and a handle, the guide needle head, the guide needle body and the handle are sequentially connected from left to right, the guide needle head is composed of a plurality of snake bones, a guide head and two steel wire ropes, and each snake bone comprises a cylindrical boss; the bending and the direction of the guide needle can be adjusted by arranging the guide needle head through the cooperation of the handle, the adjusting grip, the guide needle body, the steel wire rope, the snake bone and the guide head, the direction of the guide needle end can be correspondingly adjusted according to the direction of the far-end fracture end, the lifting performance of the guide needle at the fracture end is improved, fluoroscopy in an operation is reduced, the operation time is shortened, and the working efficiency is improved. Cutting of the fracture end is reduced, and blood supply damage of the fracture end is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a steering adjustable guide needle for guiding intramedullary needle into a fracture end. BACKGROUND

[0002] Fracture is a common clinical disease. With the aggravation of population aging, the number of osteoporotic fractures caused by falls in the elderly is increasing, and the number of high-energy activities such as high-altitude operations and traffic accidents is also increasing, so the incidence continues to increase. After fracture trauma, the fracture end is obviously displaced, which affects the force line of the affected limb, and it is difficult to achieve ideal results through conservative treatment, and although open reduction and internal fixation can reduce and fix, promote fracture healing, the trauma is large, there is much bleeding during the operation, and the risk of postoperative internal fixation rupture and nonunion is high.

[0003] With the development of medical machinery and the improvement of orthopedic physician technology, intramedullary nail is the mainstream way to treat fracture, especially in long bones such as femur and tibia. When the intramedullary needle is placed into the fracture, the guide needle is first placed to guide, and the placement of the guide needle is the key to the placement of the intramedullary needle into the medullary cavity; the introduction of the guide needle into the fracture end is an important factor affecting the operation time. The guide needle is generally a straight steel wire with a diameter of 3.0mm and a length of about 1m. Due to closed reduction, the fracture reduction is poor, and it is difficult for the guide wire to pass through the fracture end, often requiring multiple adjustments, and even a considerable part of the fracture needs open reduction before the guide needle can smoothly pass through the fracture end; the main reason is that the fracture end cannot be well reduced, the guide needle is straight, and cannot adjust the corresponding needle direction according to the direction of the fracture end, and cannot pass through the distal end of the fracture, which reduces the passing property of the guide needle in the fracture end, increases the intraoperative fluoroscopy, increases the operation time, increases the probability of cutting open the fracture end, and increases the damage to the blood supply of the fracture end. In view of this, a steering adjustable guide needle for guiding intramedullary needle into a fracture end is needed. SUMMARY

[0004] (1) Technical problem to be solved

[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a steering adjustable guide needle for guiding intramedullary needle into a fracture end, which is mainly used to solve the technical problems that the guide needle is straight, cannot adjust the corresponding needle direction according to the direction of the fracture end, and cannot pass through the distal end of the fracture under the prior art.

[0006] (2) Technical scheme

[0007] In order to solve the above technical problems, the utility model provides a kind of steering adjustable guide needle for fracture end intramedullary needle introduction, including guide needle head, guide needle body and handle, the guide needle head, guide needle body and handle are sequentially connected from left to right, the guide needle head is composed of multiple snake bones, guide head and two steel wire ropes, the snake bone all includes the boss of cylindrical type, the left side of the boss is fixedly connected with the main body of cylindrical type, the recess that is compatible with boss is formed in the middle of the side of main body away from boss, the left end and the right end of main body are equipped with contact bevel, the middle part of main body and be located the both sides of boss are equipped with threading hole, the right end of most right side snake bone is fixedly connected with guide head, two the left side of steel wire rope far end and guide head is fixedly connected, another end of two steel wire ropes is sequentially threaded through the threading hole on multiple main bodies and guide needle body and is connected with handle.

[0008] Preferably, the diameter of the boss is less than the inner diameter of the recess, and the bosses on the adjacent two snake bones are movably connected to the inside of the recess.

[0009] Further, the left end of the guide needle body is threadedly connected to the middle part of the right side of the handle, and the right end of the guide needle body is sleeved with the main body of the leftmost snake bone.

[0010] Further, the right end of the handle and located on both sides of the guide needle body are provided with arc grooves compatible with fingers.

[0011] Further, the middle part of the handle and located on both sides of the guide needle body are mounted with movable pulleys, and the right side of the movable pulley is fixedly connected with an adjusting handle.

[0012] Further, the side away from the handle of the two adjusting handles is respectively fixedly connected with the corresponding steel wire rope near end.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The guide needle head can adjust the bending and direction of the guide needle through the cooperation of the handle, adjusting handle, guide needle body, steel wire rope, snake bone and guide head, can adjust the end direction of the guide needle according to the end direction of the distal end fracture end, improve the lifting property of the guide needle in the fracture end, reduce intraoperative fluoroscopy, shorten the operation time, reduce the incision of the fracture end, and reduce the damage of blood supply of the fracture end. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the guide needle head three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is the whole section structure schematic view of the utility model;

[0018] Figure 3 It is single snake bone three-dimensional structure schematic view of the utility model;

[0019] Figure 4 It is single snake bone main view structure schematic view of the utility model;

[0020] Figure 5 It is single snake bone plan view structure schematic view of the utility model;

[0021] Figure 6 It is single snake bone three-dimensional structure schematic view of the utility model; Figure 5 Middle A-A section view structure schematic view of the utility model;

[0022] Figure 7 It is guide needle head steering adjustment state's structure schematic view of the utility model;

[0023] Figure 8 It is handle, guide needle body and guide needle head connection's structure schematic view of the utility model;

[0024] Figure 9 It is handle, guide needle body and guide needle head cooperation steering adjustment state's structure schematic view of the utility model.

[0025] The mark in the drawing is: 1, boss;2, recess;3, snake bone outer wall;4, threading hole;5, contact inclined surface;6, steel wire rope;7, guide head;8, steel wire rope distal end;11, handle;12, adjustment knob;13, steel wire rope proximal end;14, movable pulley;15, guide needle body. DETAILED DESCRIPTION

[0026] The specific embodiment is a kind of for the intramedullary needle guide of fracture end, and its structure schematic view is as shown in Figures 1-9 Including guide needle head, guide needle body 15 and handle 11, guide needle head, guide needle body 15 and handle 11 are sequentially connected from left to right, guide needle head is composed of multiple snake bones, guide head 7 and two steel wire ropes 6, snake bone all includes the boss 1 of cylindrical type, the left side of boss 1 is fixedly connected with the main body of cylindrical type, the side of main body away from boss 1 middle part is equipped with the recess 2 compatible with boss 1, the left end and the right end of main body are all equipped with contact inclined surface 5, the middle part of main body and being located at the left and right sides of boss 1 are all equipped with threading hole 4, guide head 7 is fixedly connected to the right end of the rightmost snake bone, two steel wire ropes 6 are all fixedly connected with the left side of guide head 7 through steel wire rope distal end 8, the other end of two steel wire ropes 6 is all sequentially threaded through the threading hole 4 on multiple main bodies and guide needle body 15 and is connected with handle 11 through steel wire rope proximal end 13.

[0027] The guide needle body 15 can be cylindrical, and the bosses 1 on the left serpentine bones and the grooves 2 on the right serpentine bones are matched by connecting the serpentine bones end to end, the guide head 7 is fixedly connected to the right end of the rightmost serpentine bone, the steel wire rope 6 is fixedly connected to the guide head 7 through the steel wire rope distal end 8, the steel wire rope 6 passes through the threading holes 4 on the serpentine bones in sequence through the steel wire rope proximal end 13, so that the serpentine bones can be connected together, by alternately pulling the two steel wire ropes 6, the serpentine bones can be turned in sequence towards the pulling direction, when the guide needle is horizontal, the contact slopes 5 on both sides are not in contact, and the outer walls 3 of the serpentine bones, that is, the main body outer walls, are on the same curved surface, when the steel wire rope proximal end 13 is pulled, the contact slopes 5 on adjacent serpentine bones can be in contact, and at the same time, the steel wire rope proximal end 13 passes through the leftmost threading hole 4 and extends to the inside of the guide needle body 15, and finally is fixedly connected with the adjusting handle 12.

[0028] The diameter of the boss 1 is smaller than the inner diameter of the groove 2, and the bosses 1 on adjacent two serpentine bones are movably connected in the inside of the groove 2; by matching the boss 1 in the inside of the groove 2, the serpentine bones can be arranged and connected into a whole, which is convenient for guiding.

[0029] In addition, the left end of the guide needle body 15 is threadedly connected to the right middle part of the handle 11, and the right end of the guide needle body 15 is sleeved with the main body of the leftmost serpentine bone; in this way, when the guide needle is guided into the bone marrow, the handle 11 can be detached from the guide needle body 15, and used for guiding the hollow reaming drill into the bone fracture marrow cavity along the guide needle.

[0030] In addition, the right end of the handle 11 and the two sides of the guide needle body 15 are provided with arc-shaped grooves matched with fingers; in this way, the arc-shaped grooves can be matched with the fingers to ensure the stability of holding the handle 11.

[0031] In addition, the middle part of the handle 11 and the two sides of the guide needle body 15 are provided with movable pulleys 14, and the right side of the movable pulley 14 is fixedly connected with the adjusting handle 12; the sides away from the handle 11 of the two adjusting handles 12 are fixedly connected with the corresponding steel wire rope proximal ends 13; when the adjusting handles 12 are in the initial state, that is, do not apply force to the two steel wire ropes 6, the two adjusting handles 12 are in the shape of a splay, and the ends away from each other of the two adjusting handles 12 are away from the inside of the handle 11, at this time, the serpentine bones are in the coaxial horizontal state.

[0032] Working principle: when using, the new type of adjustable guide needle is used for the introduction of the antegrade intramedullary nail in the treatment of femoral shaft fracture. According to the patient's physical condition and the anesthesiologist's decision, intraspinal anesthesia or general anesthesia is generally adopted. Usually, lateral position or supine position is adopted. If the patient is supine, the trunk and the affected limb are adducted, and the hip joint on the affected side is flexed by 15°-30°. The patient lies on a visible operating bed or a fracture traction bed; a 2-3 cm oblique incision is made from the proximal femoral greater trochanter on the lateral side of the hip, and if necessary, it is extended to both sides, especially for obese people. The skin and subcutaneous tissue are incised, and the fascia is incised along the direction of the gluteus maximus muscle fibers. The sublevel of the gluteus maximus muscle fascia is identified, and the surgeon touches the piriform fossa or the intertrochanteric fossa with his fingers;

[0033] Insertion of the adjustable guide needle: a kirschner wire is inserted into the piriform fossa plane, and the C-arm machine is used to adjust the position of the kirschner wire insertion point in the femoral trochanteric part. The insertion point of the flared drill for expanding the intramedullary nail is inserted along the kirschner wire in the proximal segment of the femur, and the fracture ends are properly tractioned and reduced. The adjustable guide needle is inserted at the flared part of the proximal segment of the femur. According to the C-arm machine, the displacement of the fracture end is adjusted accordingly. The adjustment process is shown in Figure 9 When it is necessary to deflect the guide needle head upward, the upper adjusting handle 12 can be loosened, and the lower adjusting handle 12 is pulled. The lower adjusting handle 12 can rotate in the handle 11 through the movable pulley 14, so as to realize the deflection of the adjusting handle 12. At the same time, the lower adjusting handle 12 pulls the lower end of the steel wire 6 to the left in the guide needle body 15, so that the lower end of the guide head 7 can be deflected downward, and the upper end of the guide head 7 drives the upper steel wire 6 to move to the right, so that the upper adjusting handle 12 is close to the guide needle body 15, and each snake bone is deflected downward and makes the adjacent contact slope 5 contact, and the upper end of the adjacent contact slope 5 is away from each other. When the lower adjusting handle 12 is loosened, the deflection direction of the snake bone is opposite;

[0034] Insertion of the intramedullary nail: remove the handle 11, and insert the reaming drill along the guide needle body 15 into the medullary cavity at an interval of 0.5 mm, and gradually ream the medullary cavity until a click sound is heard; remove the reaming drill, and place the guide needle body 15 in the medullary cavity. Measure the length and diameter of the inserted intramedullary nail to select the appropriate size and length of the intramedullary nail. Insert the intramedullary nail into the medullary cavity, and knock it gently to make it completely enter the fixation. Remove the guide needle, and lock the proximal and distal ends of the intramedullary nail. Suture the incision layer by layer.

[0035] All the technical features in the embodiment can be freely combined according to actual needs.

[0036] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

Claims

1. A steerable adjustment guide pin for the introduction of an intramedullary pin into a fracture end, characterized in that: The utility model provides a kind of needle guide, including guide needle, guide needle body (15) and handle (11), the guide needle, guide needle body (15) and handle (11) are sequentially connected from left to right, the guide needle is composed of multiple snake bones, guide head (7) and two steel wire ropes (6), the snake bone includes the boss (1) of cylindrical type, the boss (1) left side fixedly connected with the main body of cylindrical type, the main body is distantly located from the side middle part of boss (1) and is equipped with the recess (2) of adaptation with boss (1), the main body left end and right end are equipped with contact bevel (5), the main body middle part and be located the both sides of boss (1) are equipped with threading hole (4), the guide head (7) is fixedly connected in the right end of most right side snake bone, two the steel wire rope (6) is fixedly connected with the left side of guide head (7) by steel wire rope distal end (8), and the other end of two the steel wire rope (6) is sequentially threaded threading hole (4) and guide needle body (15) on multiple main bodies by steel wire rope proximal end (13) and is connected with handle (11).

2. A steerable adjustment guide pin for intramedullary pin insertion into fractured bone fragments as defined in claim 1, wherein: The diameter of the boss (1) is less than the inner diameter of the recess (2), and the bosses (1) on the adjacent two snake bones are movably connected inside the recess (2).

3. The steerable adjustment guide pin for intramedullary pin insertion according to claim 1, wherein: The left end of the guide needle body (15) is threadedly connected to the right middle part of the handle (11), and the right end of the guide needle body (15) is sleeved with the main body of the leftmost snake bone.

4. The steerable adjustment guide pin for intramedullary pin insertion according to claim 1, wherein, The right end of the handle (11) and located on both sides of the guide needle body (15) are provided with arc-shaped grooves adapted to fingers.

5. The steerable adjustment guide pin for intramedullary needle introduction of fractured ends according to claim 1, characterized in that: The middle part of the handle (11) and located on both sides of the guide needle body (15) are mounted with movable pulleys (14), and the right side of the movable pulley (14) is fixedly connected with an adjusting knob (12).

6. A steerable adjustment guide pin for intramedullary pin insertion into fractured bone fragments as defined in claim 5, wherein: The side of the two adjusting knobs (12) away from the handle (11) is fixedly connected with the corresponding steel wire rope proximal end (13).

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