CN2666361Y

CN2666361Y - Tibial elastic intramedullary nail

Info

Publication number: CN2666361Y
Application number: CN 200320117488
Authority: CN
Inventors: 王建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-29
Filing date: 2003-10-29
Publication date: 2004-12-29
Anticipated expiration: 2013-10-29

Abstract

The utility model discloses a tibial flexible intramedullary nail, comprising a head, a waist and a tail three sections, wherein, the head section and the tail section are constant width structures, and the width of the tail section is larger than that of the head section; the front side and the back side of the waist section are respectively formed the included angles of Beta and Alpha with the axis line of the head section, the Alpha is larger than Beta; the tail section is tilted to the backside direction of the tibia, and the included angle of the axis line of the tail section and the axis line of the head section is Phi. The utility model has reasonable structure, good performance, and good matching attribute with the shape of the marrow cavity of tibia, good fixation effect of the tibial fracture with higher positions and no withdrawal of the nail during the healing process.

Description

The tibia flexible intramedullary nail

Technical field

This utility model relates to a kind of tibia flexible intramedullary nail.When being used for fracture of tibia, it carries out the treatment of internal fixation.

Background technology

Fracture of tibia is modal a kind of long bone fracture, and it is multiple that its operative treatment apparatus mainly contains steel plate, interlocking intramedullary nail, rectangle intramedullary pin, Anda (ender) nail etc.Steel plate is fixing owing to need big operative incision and the too much periosteum of peeling off, and damages the blood supply of fracture site easily, influences union of fracture, has certain defective.Intramedullary pin is that treatment fracture of shaft of tibia comparison operators closes the Therapeutic Method of fixation principle biology, and follow closely the Anda (ender) that mainly contains of domestic use, rectangle intramedullary pin etc., and foreign matter equipment and material mainly contains interlocking intramedullary nail.Latter's complicated operation to the equipment requirements height, costs an arm and a leg.And use the mode that maximum Anda (ender) nail and rectangle intramedullary pin belong to the elasticity internal fixation at present.Both compare, and the former is bar-shaped, easy rotation; The latter's design more meets the fixed needs of tibia, and mechanical property is strong slightly.But the rectangle intramedullary pin also is a kind of wide elongated rectangular shape nail, still is not the anatomical features that meets tibia fully.In addition, in use there is following defective in the rectangle intramedullary pin: 1) the plug pin operation is to exist in two pieces of intramedullary pin crossover phenomenons, influences the performance of its optimal fixation effect; 2) rectangle nail is poor with the form fit of tibia pulp cavity, because narrow and to two ends broadening gradually in the middle of the tibia pulp cavity, wide rectangle nail is poor to the higher fracture of tibia fixed effect in position; 3) the nail phenomenon is moved back in the fracture healing process existence.

Summary of the invention

The purpose of this utility model is in order to provide a kind of rational in infrastructure, function admirable, meets the tibia flexible intramedullary nail of the anatomical features of tibia pulp cavity.

Main technical schemes of the present utility model is: this tibia flexible intramedullary nail comprises three sections on head, waist, tail, and wherein head section, rear are wide structure, and the width of rear is greater than the head section; The front side edge of waist section, back side edge are β, α with the angle of head section axis respectively, and α＞β; Rear tilts to the rear direction of tibia, and the angle of axis and head section axis is Ф.

Planform of the present utility model meets the anatomical features of tibia pulp cavity, and is rational in infrastructure, function admirable.Because this utility model is a big structure of little tail, when the operation plug pin, can insert a nail earlier, after entering the pulp cavity epimere to the wide portion of this nail, insert the intramedullary pin of offside again, behind fracture site, judge to have or not intersection, continue to insert the pulp cavity far-end after adjusting the position, up to forming stable reset and fixing, the individual nail of offside can effectively be avoided crossover phenomenon along the wider portion insertion of last nail like this; The form fit of this utility model and tibia pulp cavity is good, and the higher fracture of tibia in position is also had good fixed effect, and does not take place to move back the nail phenomenon in the agglutination.

Description of drawings

Fig. 1 is the structural representation of an embodiment of this utility model;

Fig. 2 is A-A among Fig. 1, B-B, C-C cutaway view;

Fig. 3 is that Fig. 1 is at human tibia internal fixation structural representation;

Fig. 4 is the side view of Fig. 3.

The specific embodiment

As shown in Figure 1, the tibia flexible intramedullary nail 1 of present embodiment comprises three section 11 on head, waist, tail, 12,13, and wherein head section 11, rear 13 are wide structure, and the width of rear 13 is greater than head section 11; The front side edge of waist section 12, back side edge are β, α with the angle of head section axis respectively, and α＞β; Rear 13 tilts to the rear direction of tibia, and the angle of axis and head section axis is Ф.Corresponding to the human tibia both sides, symmetric two tibia flexible intramedullary nails are arranged.The uropore 31 that can pass for hold-down screw 4 is arranged on the rear 13, and the uropore 31 that hold-down screw 4 passes is fixed on tibia flexible intramedullary nail 1 in the tibia pulp cavity, can further prevent to move back the nail phenomenon in the agglutination, sees Fig. 3,4.As shown in Figure 1, the cross section of head section 11 and waist section 12 is trapezoidal in the present embodiment, and the cross section of rear 13 is a rectangle.Trapezoid so pointed broadside can help smoothly inwardly plug pin.

The side of nail presents form wide at the top and narrow at the bottom.Head, rear are wide structure, and the waist section according to the variation design of tibia pulp cavity radian and width, makes nail and tibia pulp cavity chimeric tightr fully, has increased both matching lengths; Rear is wideer than ordinary rectangular intramedullary pin, and rear has an angle that slightly is hypsokinesis, guarantees that the afterbody of intramedullary pin is positioned on the center line of tibial side face.It is supporting squeezes into apparatus and the ordinary rectangular intramedullary pin is compatible substantially.

Tibia flexible intramedullary nail of the present utility model adopts 316 medical stainless steel sheet materials, through casting, and forging and pressing, technology manufacturings such as polishing form.Measure strong side calf shank tuberosity to the length foundation of internal malleolus peak length with ruler before the operation as elastic nail.Picked-up tibia total length anterioposterior and lateral film is measured tibia pulp cavity width with template, selects only intramedullary pin.

Adopt operation method of the present utility model to be: adopt the liquor-saturated or epidural anesthesia of lumbar anesthesia, the patient gets dorsal position, and sterilization Shop is single.At first find out about behind the fracture site, get the shin fore edge, appear fracture site, hematoma clearance.Get the other otch of falling the Eight characters of tibial tubercle again, cut to periosteum; After periosteum pushed away stripping slightly, window with osteotome, bone window size is approaching with selected rectangle intramedullary pin nail tail width, and the bone window of both sides guarantees on same horizontal plane as far as possible.After the bone window is held successfully, earlier anatomical form tibia flexible intramedullary nail is in the outer part inserted pulp cavity, enter the pulp cavity epimere to the wide portion of this nail after, insert the intramedullary pin of offside again, behind fracture site, judge to have or not intersection, continue to insert the pulp cavity far-end after adjusting the position, up to forming stable reset and fixing.Be screwed into two pieces of afterbody anti-back screws at last, sew up and close otch, art finishes.

Claims

1, a kind of tibia flexible intramedullary nail is characterized in that: comprise head, waist, tail three sections (11), (12), (13), wherein head section (11), rear (13) are wide structure, and the width of rear (13) is greater than head section (11); The front side edge of waist section (12), back side edge are β, α with the angle of head section axis respectively, and α＞β; Rear (13) tilts to the rear direction of tibia, and the angle of axis and head section axis is Φ.

2, a kind of tibia flexible intramedullary nail according to claim 1 is characterized in that: corresponding to the human tibia left and right sides, symmetric two tibia flexible intramedullary nails are arranged.

3, a kind of tibia flexible intramedullary nail according to claim 1 and 2 is characterized in that: the uropore (31) that can pass for hold-down screw (4) is arranged on the rear (13).

4, a kind of tibia flexible intramedullary nail according to claim 1 and 2 is characterized in that: the cross section of head section (11) and waist section (12) is trapezoidal, and the cross section of rear (13) is a rectangle.