CN2549920Y

CN2549920Y - Humerus retrograde intramedullary nail

Info

Publication number: CN2549920Y
Application number: CN 02278212
Authority: CN
Inventors: 杨卫兵; 高雁卿; 刘安龙; 付保恩; 王进; 王军
Original assignee: 杨卫兵
Priority date: 2002-06-27
Filing date: 2002-06-27
Publication date: 2003-05-14
Anticipated expiration: 2012-06-27

Abstract

The utility model provides a humerus retrograde intramedullary nail, which belongs to the filed of medical appliance, and is applicable to the middle-far section fracture of the humerus. The main technology is that an S-shaped column bar is a nail body, the nail point is prismatic, the middle of the nail tail is provided with a screw hole, and the external part of the nail is provided with two symmetric alar plates; moreover, the nail body at the nail point end is provided with an ellipse hole, and the long diameter of the ellipse hole has the same direction as the center line of the nail body; the nail body at the nail tail end is provided with a round hole, and the center lines of the ellipse hole and the round hole form an angle. Apart from complying with the biomechanics requirements of the humerus, the main advantages of the utility model are that the humerus retrograde intramedullary nail not only can be solidly fixed and has strong bending and rotary resistance, but also greatly reduces the damage to the radial nerve and the blood vessels around as well as the incidence rate of no humerus healing.

Description

The humerus retrograde intramedullary nail

(1) technical field: this utility model belongs to medical instruments field.

(2) background technology: present, section fracture far away is comparatively common in the humerus, and operation method commonly used has compression steel plate, and internal fixation adds external plaster fixation, consolidates frame etc. outward.These methods all are can be practicable on theory and practice.But, still there are some problems not obtain satisfied the solution, especially iatrogenic radial nerve and blood vessel injury, complicated fracture, pathological fracture, nonunion and bone are damaged, when needing strong internal fixation or reconstruction, above-mentioned inside-fixture is at warping resistance, and the ability of anti-rotation aspect is relatively poor, also not in full conformity with the requirement of biomechanics, and easily cause consequences such as iatrogenic injury, nonunion.The intramedullary nail with lock technology is a kind of new type medical equipment that grows up after the 1980s, femur, fracture of tibia have been obtained good result, but still do not have sophisticated humerus retrograde intramedullary nail at present, so need further existing method to be improved or invented.

(3) summary of the invention: the purpose of this utility model is exactly to design a kind of probability and nonunion rate that should reduce annual radial nerve and Peripheral Vascular Injuries, can solve the humerus retrograde intramedullary nail of problems such as the damaged and malunion reconstruction of fracture, pathological fracture, the bone of complicated type again well.This utility model major technique is to adopt a S-type cylindrical rod to be the nail body, the nail nose part is prismatic, in the middle of the nail afterbody hole is arranged, nail tail outside is provided with two blocks of symmetric wing plates, the most advanced and sophisticated nail of nail has hole, an ellipse garden on one's body, the major diameter in hole, ellipse garden is identical with the direction of nail body centrage, and the nail of nail tail end has hole, a garden on one's body, and ellipse garden centerline hole becomes an angle of cut with the garden centerline hole.Major advantage of the present utility model is: can be three-dimensional fixing, meet the biomechanics requirement of humerus, and warping resistance, anti-rotation performance is strong, also greatly reduces radial nerve and Peripheral Vascular Injuries, nonunion incidence rate simultaneously.

(4) description of drawings: Fig. 1 is a front elevational schematic of the present utility model, and Fig. 2 is the schematic side view of Fig. 1, and Fig. 3 is the A-A sectional drawing of Fig. 1, and Fig. 4 is the B-B sectional drawing of Fig. 1.

(5) specific embodiment: adopt a garden post rod, it is made the curved of S type, as nail body (1), nail point (3) part is made and is prismatic, manufactures a silk hole (2) in the middle of the nail afterbody, and two blocks of symmetric wing plates (5) are done in nail tail outside, the most advanced and sophisticated nail of nail bores hole, an ellipse garden (6) on one's body, make the major diameter in hole, ellipse garden identical with the direction of nail body centrage, the nail of nail tail end bores hole, a garden (4) on one's body, and hole, ellipse garden (6) centrage becomes an angle of cut with hole, garden (4) centrage.The nail body make the S type mainly be for the shape that makes nail consistent with the shape of humerus.The nail point is the prismatic of point, and the one, with great difficulty hammer into, the 2nd, for the rotation of anti-non-magnetic shim.Two blocks of aerofoil profile plates rotation in order to prevent to follow closely equally of nail afterbody.Nail hole, ellipse garden and hole, garden on one's body all is to insert steady pin to use.Hole, ellipse garden becomes an angle of cut with the garden centerline hole, and this measure also is the rotation of anti-non-magnetic shim and moves.This utility model will be by means of external fixer, the steady pin in hole, ellipse garden and the steady pin in hole, garden, all to be fixed on the fixed mount, simultaneously with firm being connected of nail body, sight also is housed on the fixed mount, make steady pin enter into hole, ellipse garden easily and the hole, garden is gone, and do not damage vascellum laterale and nerve in the humerus.Nail tailfiber hole is used for extraneous Connection Bracket and the head of a nail is installed is used.This utility model major advantage is: can be three-dimensional fixing, meet the biomechanics requirement of humerus, and warping resistance, anti-rotation performance is strong.

Claims

1, a kind of humerus retrograde intramedullary nail, it is characterized in that: adopt a S-type garden post rod to be nail body (1), nail point (3) part is prismatic, in the middle of nail tail (7) portion hole (2) is arranged, nail tail outside is provided with two blocks of symmetric wing plates (5), and the most advanced and sophisticated nail of nail has hole, an ellipse garden (6) on one's body, and the major diameter in hole, ellipse garden is identical with the direction of nail body centrage, the nail of nail tail end has hole, a garden (4) on one's body, and ellipse garden centerline hole becomes an angle of cut with the garden centerline hole.