Femoral intramedullary nail main nail guide needle positioning protection guider

Abstract

The femoral intramedullary nail main nail guide needle positioning protection guider comprises a protection baffle, at least two finger rings, a positioning needle and a closed catheter, one side of the protection baffle is arranged in an arc shape to be matched with the fingers of the human body, the finger rings are arranged on the arc-shaped side wall of the protection baffle in an up-down spaced mode, and ring openings of the finger rings can be adjusted; 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 invention relates to a positioning and protecting guide for a main nail guide needle of a femoral intramedullary nail, belonging to the technical field of medical devices. Background Art

[0002] With the deepening of the theoretical and technical research of internal fixation devices, femoral intramedullary nailing has become a commonly used internal fixation method for intertrochanteric fractures, subtrochanteric fractures and diaphyseal fractures.

[0003] During the operation, the positioning and smooth insertion of the main nail guide needle of the femoral intramedullary nail is a very important step. Usually, the surgeon first touches the proximal femur with his fingers to confirm the insertion point, then uses his fingers to guide the needle tip to the insertion point, and then uses an electric drill with a sleeve or a handheld T-handle to insert the guide needle. During the insertion process, the direction of the guide needle needs to be adjusted to smoothly go down along the medullary cavity and pass through the fracture end. The above traditional operation process has many defects: First, the guide needle is placed at the insertion point with the fingers (refer to Figure 1 ), if the operation is not careful, the surgeon's fingers may be injured or the gloves may be punctured, resulting in occupational exposure or increasing the risk of infection for the patient; second, since the insertion point is smooth, the guide needle may slip at the insertion point, resulting in positioning failure; third, in order to smoothly guide the guide needle down along the medullary cavity and through the fracture end, the direction of the guide needle needs to be constantly adjusted. The traditional method lacks a force point, making adjustment more difficult; fourth, the insertion process requires repeated fluoroscopy. If the insertion point of the guide needle is not accurately positioned or the insertion is difficult, the number of fluoroscopy times will be significantly increased, causing damage to the surgeon and the patient.

[0004] The invention patent "Ring Guide for Proximal Femoral Intramedullary Nail" (publication number: CN 105434034 A) discloses a proximal femoral guide needle guide, which is composed of a ring and a guide tube. Its design structure lacks finger protection function and anti-slip device, and the guide tube is long. Many surgeons are accustomed to bending the front part of the guide needle, which makes it impossible to insert the guide needle into the guide tube.

[0005] Therefore, there is an urgent need in the art for a femoral intramedullary nail main nail guide needle positioning and protection guide that can play a guiding role during the insertion of the femoral intramedullary nail main nail guide needle to ensure insertion efficiency and accuracy, while ensuring the safety of doctors and patients. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail, which can make the positioning and insertion operation of the main nail guide needle of the femoral intramedullary nail more convenient, safe, quick and accurate.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail, comprising a protective baffle, a finger ring, a positioning needle and a closed catheter. One side of the protective baffle is arranged in an arc shape to adapt to human fingers, the finger ring is arranged on the arc-shaped side wall of the protective baffle and at least two are arranged at intervals up and down, the finger ring ring is adjustable, a longitudinal groove is formed on the side of the protective baffle away from the arc-shaped side wall, the positioning needle is arranged on the end face of one end of the protective baffle, and the closed catheter is arranged on the outer wall of the end of the protective baffle provided with the positioning needle and is connected with the longitudinal groove.

[0009] Preferably, the finger ring arranged close to the positioning pin is in the form of a truncated cone-shaped ring body that is larger at the top and smaller at the bottom.

[0010] Preferably, the longitudinal slots are square slots with side lengths ranging from 3.2 mm to 3.5 mm.

[0011] Furthermore, the cross-section of the closed catheter on any horizontal plane is rectangular, the direction from the side of the closed catheter away 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 in the direction approaching the positioning needle, the rectangular cross-sections of the closed catheter have an arc-shaped transition, and the closed catheter is provided with a catheter groove connected to the longitudinal groove.

[0012] Furthermore, the shape of the conduit groove is similar to that of the closed conduit in equal proportion, and the length of the long side of the conduit groove is equal to the length of the side of the longitudinal slot.

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

[0014] Preferably, the positioning needle is arranged in a conical shape.

[0015] Preferably, the protective baffle, the longitudinal slots, the finger ring and the edges of the closed conduit are all rounded.

[0016] The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail provided by the present invention has the following advantages:

[0017] 1. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail of the present invention is provided with a finger protection baffle, and the guide needle can directly reach the bone cortex by passing downward along the longitudinal groove on the rear side of the baffle and into the closed catheter at the end of the groove, without hurting the fingers and gloves.

[0018] 2. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail of the present invention has a conical positioning needle designed at the distal end. After the guide needle insertion point is confirmed by the finger, a little force can be applied to conduct force through the finger ring, or other fingers can be used to assist in pressing the smooth surface of the top of the present invention, so that the positioning needle at the end can slightly penetrate the proximal femoral bursa or cancellous bone to fix its position and avoid slippage during subsequent guide needle insertion.

[0019] 3. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail of the present invention is tightly connected to the finger through a retractable finger ring. The insertion direction of the guide needle can be conveniently adjusted by applying force with the fingers and with the help of the closed catheter at the far end of the guide.

[0020] 4. The patented femoral intramedullary nail main nail guide needle positioning and protection guide can make the guide needle positioning and insertion more convenient, safe, quick and accurate, thereby reducing the number of fluoroscopy times and shortening the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of placing the guide wire at the proximal femur insertion point during the traditional operation process;

[0022] Figure 2 A schematic diagram of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided in an embodiment of the present invention Figure 1 ;

[0023] Figure 3 A schematic diagram of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided in an embodiment of the present invention Figure 2 ;

[0024] Figure 4 A side view of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided by an embodiment of the present invention;

[0025] Figure 5 A top view of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided by an embodiment of the present invention;

[0026] Figure 6 A bottom view of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided by an embodiment of the present invention;

[0027] Figure 7 A cross-sectional schematic diagram of a positioning and protection guide for a main nail guide needle of a femoral intramedullary nail provided by an embodiment of the present invention;

[0028] In the figure:

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

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0031] Reference Figure 2-Figure 7 A positioning protection guide for a main nail guide needle of a femoral intramedullary nail is integrally cast from stainless steel and includes a protective baffle 1 of a main body. One side of the protective baffle 1 is designed in an arc shape according to the index finger of a normal person. In this embodiment, the protective baffle 1 is preferably arranged in a horizontal cross-section in a crescent shape that is thick in the middle and thin on both sides. The inner side of the protective baffle 1 is used to fit with human fingers, and the inner diameter is preferably 20 mm. The length of the protective baffle 1 is preferably 35 mm, which can also be increased or decreased according to the finger characteristics of the user population.

[0032] Reference Figure 2-Figure 7 A positioning and protection guide for a main nail guide needle of a femoral intramedullary nail, comprising a finger ring 2, a positioning needle 3 and a closed catheter 4. At least two finger rings 2 arranged at intervals from top to bottom extend from both sides of the inner wall of the protection baffle 1. In this embodiment, there are preferably two finger rings 2, which are arranged at both ends of the protection baffle 1. The ring opening of the finger ring 2 can be reduced by pressing, or can be expanded by a ring rod, or matched with a matching regulator to achieve the adjustment of the ring opening of the finger ring 2; a longitudinal groove 11 is opened on the outer wall of the middle part of the protection baffle 1 along the length direction, and the positioning needle 3 is provided on the inner wall of the protection baffle 1. The positioning needle 3 is integrally formed on the end surface of one end of the protective baffle 1, and is arranged in a conical shape and is close to the front edge of the longitudinal groove 11. The bottom diameter of the positioning needle 3 is preferably 2.5 mm, and the height is preferably 3 mm, which can also be adjusted according to the situation; the closed catheter 4 is integrally formed on the outer wall of one end of the protective baffle 1 where the positioning needle 3 is provided and is connected to the longitudinal groove 11. During actual operation, the longitudinal groove 11 is conducive to the guide needle sliding down into the closed catheter 4 wrapped by the groove at the distal end of the rear side of the protective baffle 1, and avoids the guide needle tip from piercing the surrounding soft tissue.

[0033] The finger ring 2 arranged near the positioning needle 3 is in the form of a truncated cone-shaped ring with a larger upper part and a smaller lower part, which fits the shape of the finger and can better play a fixing role, reducing the possibility that the protective baffle 1 will slide due to force and affect the operation during the operation; since the commonly used main nail guide needle has a diameter of 3.2mm or 2.5mm, the longitudinal groove 11 is designed to be a square groove with a side length ranging from 3.2mm to 3.5mm. In this embodiment, the side length of the longitudinal groove 11 is preferably 3.5mm, so that it can be smoothly adapted to the guide needle with the thickest diameter, and the user can also adjust it according to the specific situation.

[0034] Reference Figure 2-Figure 7In a further embodiment, the cross-section of the closed conduit 4 on any horizontal plane is rectangular, 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 lengths of the rectangular cross-sections of the closed conduit 4 are equal, the widths of the rectangular cross-sections gradually decrease in the direction approaching the positioning pin 3, the rectangular cross-sections of the closed conduit 4 are arc-shaped transitions, a conduit groove 41 connected to the longitudinal groove 11 is provided on the closed conduit 4, the shape of the conduit groove 41 is similar to that of the closed conduit 4 in equal proportion, the length of the long side of the conduit groove 41 is equal to the length of the longitudinal groove 11, the sum of the length of the wide side of the conduit groove 41 away from the positioning pin 3 and the length of the longitudinal groove 11 is preferably 6 mm, and the sum of the length of the wide side of the conduit groove 41 on the side of the positioning pin 3 and the length of the longitudinal groove 11 is preferably 3.5 mm.

[0035] Furthermore, the edges of the protective baffle 1, the longitudinal slots 11, the finger ring 2 and the closed catheter 4 are all rounded to avoid damaging the operator's fingers.

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

[0037] When performing intramedullary nail fixation surgery for intertrochanteric fracture, subtrochanteric fracture and diaphyseal fracture, the operator puts the finger ring 2 of the present invention on the index finger (or other fingers), and adjusts the ring 2 to a suitable size. When wearing it, according to the operator's operating habits, the protective baffle 1 of the present invention can be located on the palm side of the index finger or on the dorsal side. Insert the finger deep into the incision, and the fingertip probes the proximal femoral needle insertion point. The index finger presses slightly with force through the finger ring 2, or other fingers assist in pressing the smooth surface of the top of the present invention, so that the positioning needle 3 at the end slightly penetrates the proximal femoral bursa or cancellous bone to avoid sliding. The intramedullary nail guide needle (which can be straight or curved) is slid into the closed catheter 4 along the dorsal longitudinal groove 11 of the present invention, and it can be punctured into the bone with a little force, and further enters the medullary cavity. By adjusting the direction of the closed catheter 4 with force by the index finger, the direction of the guide needle insertion can be controlled, and finally the fracture end is smoothly passed. After satisfactory perspective, the present invention can be taken out along the end of the guide needle.

[0038] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A positioning and protection guide for a main nail guide needle of a femoral intramedullary nail, characterized in that: The invention comprises a protective baffle (1), a finger ring (2), a positioning needle (3) and a closed conduit (4); one side of the protective baffle (1) is arranged in an arc shape to fit a human finger; the finger ring (2) is arranged on the arc-shaped side wall of the protective baffle (1) and at least two finger rings (2) are arranged at intervals up and down; the ring opening of the finger ring (2) is adjustable; a longitudinal groove (11) is formed on the side of the protective baffle (1) away from the arc-shaped side wall; the positioning needle (3) is arranged on an end surface of the protective baffle (1); and the closed conduit (4) is arranged on the outer wall of the end of the protective baffle (1) where the positioning needle (3) is arranged and is connected to the longitudinal groove (11).

2. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 1, characterized in that: The finger ring (2) arranged close to the positioning needle (3) is in the shape of a truncated cone with a larger upper portion and a smaller lower portion.

3. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 1, characterized in that: The longitudinal slots (11) are square slots with a side length ranging from 3.2 mm to 3.5 mm.

4. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 3, characterized in that: The cross-section of the closed conduit (4) on any horizontal plane is rectangular, 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 lengths of the rectangular cross-sections of the closed conduit (4) are equal, the widths of the rectangular cross-sections gradually decrease in the direction approaching the positioning needle (3), the rectangular cross-sections of the closed conduit (4) are arc-shaped transitions, and the closed conduit (4) is provided with a conduit groove (41) connected to the longitudinal slot (11).

5. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 4, characterized in that: The shape of the conduit groove (41) is similar in proportion 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 positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 1, characterized in that: The cross section of the protective baffle (1) in the horizontal direction is in a crescent shape that is thick in the middle and thin at both sides.

7. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 1, characterized in that: The positioning needle (3) is arranged in a conical shape.

8. The positioning and protection guide for the main nail guide needle of the femoral intramedullary nail according to claim 1, characterized in that: The edges of the protective baffle (1), the longitudinal slots (11), the finger ring (2) and the closed conduit (4) are all rounded.

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