Femoral intramedullary nail main nail guide needle positioning protection guider

Abstract

The utility model discloses a thigh intramedullary nail main nail guide needle location protection guider, including protection baffle, ring, location needle and closed conduit, protection baffle one side arc is provided to fit the human finger, the ring is provided on protection baffle arc side wall and up and down interval is provided at least two, the ring mouth is adjustable, and the location needle is provided with the ring mouth. The side, away from the arc-shaped side wall, of the protection baffle is longitudinally provided with a groove, the positioning needle is arranged on the end face of one end of the protection baffle, and the closed guide pipe is arranged on the outer wall of the end, provided with the positioning needle, of the protection baffle and communicated with the longitudinal groove. And the finger ring close to the positioning needle is a circular truncated cone-shaped ring body with a large upper part and a small lower part. According to the femoral intramedullary nail main nail guide needle positioning and protecting guider, the guide needle can be positioned and placed more conveniently, safely, quickly and accurately, so that the perspective frequency is reduced, and the operation time is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a femoral intramedullary nail main nail guide needle positioning protection guider belongs to medical instrument technical field. BACKGROUND

[0002] With the in-depth research of internal fixation instrument theory and technology, femoral intramedullary nail has become the common internal fixation mode of intertrochanteric fracture, subtrochanteric fracture and diaphyseal fracture.

[0003] In the operation process, the positioning of the femoral intramedullary nail main nail guide needle and the smooth placement are very important. Usually, the operator first touches the proximal femur to confirm the placement point, and then guides the needle tip to the placement point with fingers, and then places the guide needle into the sleeve or hand-held T handle with the electric drill. During the placement process, the direction of the guide needle needs to be adjusted to smoothly descend along the medullary cavity and pass through the fracture end. The above traditional operation process has many defects: first, the guide needle is placed in the placement point with fingers (refer to Figure 1 ), which can damage the fingers of the operator or pierce the gloves, leading to occupational exposure or increasing the risk of patient infection; second, the guide needle will slide at the placement point due to the smoothness of the placement point, resulting in positioning failure; third, in order to smoothly descend the guide needle along the medullary cavity and pass through the fracture end, the direction of the guide needle needs to be adjusted constantly, and the traditional method lacks stress points, making it difficult to adjust; fourth, the placement process needs to be repeatedly observed, and if the positioning of the guide needle is not accurate or the placement is difficult, the number of observations will be significantly increased, which will cause damage to the operator and the patient.

[0004] The utility model patent "femoral proximal intramedullary nail guide guider" (publication number: CN 105434034 A) discloses a femoral proximal guide needle guider, which is composed of a ring and a guide tube. The design structure lacks finger protection function and anti-skid device, and the guide tube is relatively long. Many surgeons are used to bending the front part of the guide needle, which makes the guide needle unable to be inserted into the guide tube.

[0005] Therefore, the technical field urgently needs a femoral intramedullary nail main nail guide needle positioning protection guider which can guide the placement of the femoral intramedullary nail main nail guide needle to ensure the placement efficiency and accuracy, and can ensure the safety of doctors and patients. UTILITY MODEL CONTENT

[0006] In order to solve the above technical problems, the utility model provides a femoral intramedullary nail main nail guide needle positioning protection guider, which can make the positioning and placement operation process of the femoral intramedullary nail main nail guide needle more convenient, safe, fast and accurate.

[0007] In order to achieve the above technical purposes and effects, the utility model realizes the following technical solutions:

[0008] The utility model provides a kind of femoral intramedullary nail main nail guide needle positioning protection guider, including protective baffle, ring, positioning needle and closed catheter, the protective baffle one side arc is arranged to adapt human finger, the ring is arranged on protective baffle arc side wall and is spaced apart to be provided with at least two, ring circle mouth can be adjusted, the side of protective baffle deviating from arc side wall is slotted longitudinally, the positioning needle is arranged on the end face of protective baffle one end, the closed catheter is arranged on the outer wall of protective baffle and is communicated with the longitudinal slot.

[0009] Preferably, the ring arranged close to the positioning needle is a circular truncated cone type ring body with large upper and small lower.

[0010] Preferably, the longitudinal slot is a square slot body with side length ranging from 3.2mm to 3.5mm.

[0011] Further, the cross section of the closed catheter on any horizontal plane is rectangular, the direction from the side of the closed catheter deviating from the protective baffle to the protective baffle is the width direction of the closed catheter, the lengths of the rectangular cross sections of the closed catheter are equal, the widths of the rectangular cross sections gradually decrease along the direction close to the positioning needle, the rectangular cross sections of the closed catheter are arc-shaped transition, and the closed catheter is provided with a catheter slot communicated with the longitudinal slot.

[0012] Further, the catheter slot is similar to the closed catheter in shape, and the length of the long side of the catheter slot is equal to the length of the side of the longitudinal slot.

[0013] Preferably, the cross section of the protective baffle in horizontal direction is a crescent shape with thick middle and thin both sides.

[0014] Preferably, the positioning needle is conical.

[0015] Preferably, the protective baffle, the longitudinal slot, the ring and the edge of the closed catheter are all arc-shaped.

[0016] The femoral intramedullary nail main nail guide needle positioning protection guider provided by the utility model has the following advantages.

[0017] 1. The femoral intramedullary nail main nail guide needle positioning protection guider of the utility model can directly reach bone cortex by setting a finger protective baffle and inserting the guide needle into the closed catheter at the end of the longitudinal slot on the back side of the baffle, without hurting fingers and gloves.

[0018] 2. The femoral intramedullary nail main nail guide needle positioning protection guider of the utility model can slightly press the positioning needle at the distal end after confirming the insertion point of the guide needle by the finger, and the force is transmitted through the ring or other fingers to press the smooth surface at the top of the utility model, so that the positioning needle at the end slightly penetrates into the proximal synovial bursa or cancellous bone of the femur, and the position is fixed, avoiding slipping when inserting the guide needle subsequently.

[0019] 3. The femoral intramedullary nail main nail guide needle positioning protection guide of the utility model, through the scalable ring, the positioning protection guide is connected with the finger closely, through the finger force, with the help of the closed guide tube of the distal end of the guide, the guide needle insertion direction can be adjusted conveniently.

[0020] 4. The femoral intramedullary nail main nail guide needle positioning protection guide of the utility model can make the guide needle positioning and placement more convenient, safe, fast and accurate, thereby reducing the perspective frequency and operation time. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of the traditional operation process that the guide needle is placed in the proximal femoral needle insertion point in the operation;

[0022] Figure 2 It is a structure schematic of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment Figure 1 ;

[0023] Figure 3 It is a structure schematic of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment Figure 2 ;

[0024] Figure 4 It is a side view of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment;

[0025] Figure 5 It is a top view of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment;

[0026] Figure 6 It is a bottom view of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment;

[0027] Figure 7 It is a cross-sectional schematic of the femoral intramedullary nail main nail guide needle positioning protection guide provided by the utility model embodiment;

[0028] In the figure:

[0029] 1-protective baffle; 11-longitudinal slot; 2-finger ring; 3-positioning needle; 4-closed guide tube; 41-guide tube slot. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] With reference to Figures 2-7 The femoral intramedullary nail main nail guide needle positioning protection guide device is integrally cast from stainless steel material, and comprises a protection baffle 1 of a main body part, the protection baffle 1 is arc-shaped designed on one side according to the index finger of normal people, in the embodiment, the cross section of the protection baffle 1 in the horizontal direction is preferably moon-shaped with thick middle and thin edges, the inner side of the protection baffle 1 is used for being attached to the human finger, and the inner side diameter is preferably 20mm, and the length of the protection baffle 1 is preferably 35mm, which can also be increased or decreased according to the finger characteristics of the user.

[0032] With reference to Figures 2-7 The femoral intramedullary nail main nail guide needle positioning protection guide device further comprises a ring 2, a positioning needle 3 and a closed catheter 4, at least two upper and lower spaced rings 2 are extended from the inner side wall of the protection baffle 1, in the embodiment, the rings 2 are preferably two, which are arranged at the two ends of the protection baffle 1, the ring 2 can be pressed to be smaller, or can be expanded by a ring rod, or can be matched with an appropriate adjuster to adjust the ring 2, a longitudinal slot 11 is formed on the outer side wall of the middle part of the protection baffle 1 along the length direction, the positioning needle 3 is integrally formed on the end face of one end of the protection baffle 1, the positioning needle 3 is conical and closely attached to the front edge of the longitudinal slot 11, the bottom diameter of the positioning needle 3 is preferably 2.5mm, and the height is preferably 3mm, which can also be adjusted according to the situation, and the closed catheter 4 is integrally formed on the outer wall of the end of the protection baffle 1 provided with the positioning needle 3 and is communicated with the longitudinal slot 11, in actual operation, the longitudinal slot 11 is beneficial to the sliding of the guide needle into the closed catheter 4 wrapped on the rear distal end of the protection baffle 1, and avoids the sharp needle from piercing the surrounding soft tissue.

[0033] The ring 2 close to the positioning needle 3 is a circular table type ring body with large upper and small lower, which is matched with the finger shape and can better play a fixing role, reducing the possibility of affecting the operation of the protection baffle 1 due to sliding under stress during the operation; since the commonly used main nail guide needle has a diameter of 3.2mm or 2.5mm, the longitudinal slot 11 is designed as a square slot body with a side length range of 3.2mm-3.5mm, in the embodiment, the side length of the longitudinal slot 11 is preferably 3.5mm, so as to be smoothly matched with the thickest guide needle, and the user can also adjust according to the specific situation.

[0034] With reference to Figures 2-7In further embodiments, the closed conduit 4 has a rectangular cross-section at any horizontal plane, the width direction of the closed conduit 4 is from the side of the closed conduit 4 away from the protective baffle 1 to the protective baffle 1, the length of each rectangular cross-section of the closed conduit 4 is equal, the width of each rectangular cross-section of the closed conduit 4 gradually decreases in the direction close to the positioning needle 3, each rectangular cross-section of the closed conduit 4 is arc-shaped transition, the closed conduit 4 is provided with a conduit groove 41 in communication with the longitudinal groove 11, the conduit groove 41 is formed in a shape similar to the closed conduit 4 in a proportion, the length of the long side of the conduit groove 41 is equal to the length of the side of the longitudinal groove 11, the length of the wide side of the conduit groove 41 away from the positioning needle 3 is preferably 6mm, and the length of the wide side of the conduit groove 41 located on one side of the positioning needle 3 is preferably 3.5mm.

[0035] Further, the protective baffle 1, the longitudinal groove 11, the finger ring 2 and the edge of the closed conduit 4 are all arc-shaped to avoid damaging the fingers of the operator.

[0036] The use process of the femoral intramedullary nail main nail guide needle positioning protection guider is as follows:

[0037] In the implementation of the femoral intertrochanteric fracture, subtrochanteric fracture and diaphyseal fracture intramedullary nail internal fixation surgery, the operator puts the finger ring 2 of the utility model into the index finger (it can also be other fingers), and adjusts the ring opening of the finger ring 2 to an appropriate size, and according to the operation habit of the operator, the protective baffle 1 of the utility model can be located on the palmar side of the index finger or the dorsal side. The finger is inserted into the incision, the fingertip reaches the proximal femur needle insertion point, the index finger slightly presses the smooth surface at the top of the utility model through the finger ring 2, or the smooth surface at the top of the utility model is pressed by other fingers, so that the positioning needle 3 at the end slightly pierces into the proximal femur synovial cavity or cancellous bone, and sliding is avoided. The intramedullary nail guide needle (it can be straight or curved) is slid along the dorsal longitudinal groove 11 of the utility model into the closed conduit 4, and slightly forces to pierce into the bone and further into the medullary cavity. The direction of the closed conduit 4 is adjusted by the index finger, the direction of the guide needle insertion can be controlled, the fracture end is finally successfully passed through, and the utility model is taken out along the end of the guide needle after the perspective is satisfied.

[0038] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form or in essence. It should be noted that those skilled in the art can make some improvements and supplements without departing from the present application, and these improvements and supplements should also be considered as the protection scope of the present application. Any equivalent changes, modifications and evolutions made by those skilled in the art without departing from the spirit and scope of the present application, and all equivalent embodiments of the present application, are still within the scope of the technical solutions of the present application.

Claims

1. A guide device for positioning and protecting the master nail of a femoral intramedullary nail, characterized in that, The device includes a protective baffle (1), a finger ring (2), a positioning pin (3), and a closed conduit (4). The protective baffle (1) is arc-shaped on one side to fit the human finger. The finger ring (2) is set on the arc-shaped sidewall of the protective baffle (1) and at least two are set at intervals. The opening of the finger ring (2) is adjustable. The protective baffle (1) has a longitudinal groove (11) on the side away from the arc-shaped sidewall. The positioning pin (3) is set on one end face of the protective baffle (1). The closed conduit (4) is set on the outer wall of the end of the protective baffle (1) where the positioning pin (3) is located and communicates with the longitudinal groove (11).

2. The femoral intramedullary nail master nail positioning and protection guide as described in claim 1, characterized in that, The ring (2) located near the positioning pin (3) is a frustum-shaped ring that is larger at the top and smaller at the bottom.

3. The femoral intramedullary nail master nail positioning and protection guide as described in claim 1, characterized in that, The longitudinal slot (11) is a square slot with a side length ranging from 3.2 mm to 3.5 mm.

4. The femoral intramedullary nail master nail positioning and protection guide as described in claim 3, characterized in that, The closed conduit (4) has a rectangular cross-section on any horizontal plane. The direction from the side of the closed conduit (4) away from the protective baffle (1) to the protective baffle (1) is the width direction of the closed conduit (4). The length of each rectangular cross-section of the closed conduit (4) is equal. The width of each rectangular cross-section gradually decreases along the direction close to the positioning pin (3). Each rectangular cross-section of the closed conduit (4) has an arc transition. The closed conduit (4) is provided with a conduit groove (41) that communicates with the longitudinal slot (11).

5. The femoral intramedullary nail master nail positioning and protection guide as described in claim 4, characterized in that, The shape of the conduit groove (41) is proportionally similar to that of the closed conduit (4), and the length of the long side of the conduit groove (41) is equal to the length of the side of the longitudinal slot (11).

6. The femoral intramedullary nail master nail positioning and protection guide as described in claim 1, characterized in that, The protective baffle (1) has a crescent-shaped cross-section in the horizontal direction, which is thicker in the middle and thinner at both sides.

7. The femoral intramedullary nail master nail positioning and protection guide as described in claim 1, characterized in that, The positioning pin (3) is conical in shape.

8. The femoral intramedullary nail master nail positioning and protection guide as described in claim 1, characterized in that, The edges of the protective baffle (1), the longitudinal slot (11), the ring (2), and the closed conduit (4) are all rounded.

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