A kind of wing intramedullary pinTechnical field
This utility model belongs to technical field of medical instruments, and particularly, this utility model relates to a kind of wing intramedullary pin.
Background technology
Fracture is that the seriality of bone structure ruptures wholly or in part.The main cause that fracture occurs mainly contains three kinds of situations: 1) direct violence: violence directly acts on a certain position of skeleton and causes this position fracture, often accompanies soft tissue injury in various degree.As wheel clashes into shank, there is fracture of shafts of tibia and fibula in shock place.2) indirect violence: by longitudinally conduction, leverage or twisting action make to fracture at a distance during indirect violence effect, as fall from eminence foot land time, trunk because gravity relation is sharply to pre-buckling, the vertebral body generation compressibility of breast lumbar spine intersection or bursting fracture.3) accumulation property strain: for a long time, repeatedly, slight direct or indirect damage can cause limbs a certain specific part fracture, also known as fatigue fracture, easily causes 1/3 shaft fracture under second and third metatarsal and fibula as walked at a distance.
The treatment of fracture generally adopts replacement and fixation, and after the reduction of the fracture, because of instability, easy generation is shifted again, diverse ways therefore will be adopted to be fixed in satisfied position, make it heal gradually.Conventional fixing means has: plintlet, plaster bandage, exterior fixation bracket, traction braking are fixing, and these fixing meanss claim extenal fixation.If fixing by surgical incision steel plate, draw point, intramedullary pin, screw etc., then claim internal fixtion.But partial fracture is after with Intramedullary nailing, due to the activity of human body, intramedullary pin often loosens along with the motion of human body, and for elderly patients, owing to mostly there is osteoporotic problem, also easily loosen after osteoporosis is fixing, intramedullary pin loosens thus makes fixed position and loosens, and then cause fracture site again to disconnect, affect union of fracture.
Therefore, a kind of intramedullary pin that can overcome above-mentioned shortcoming of research design is needed badly.
Utility model content
The purpose of this utility model is, provides a kind of wing intramedullary pin, and this Intramedullary nailing is more firm, especially solves the problem that fracture site that osteoporosis and inner cortex instability cause not easily is fixed.
For achieving the above object, this utility model have employed following technical scheme:
A kind of wing intramedullary pin, described intramedullary pin comprises main nail 1 and some pair nails 2;
Described main nail 1 comprises ailhead 11, nail bar 12 and nail tail 13, and described nail bar 12 arranges some bar-shaped troughs 14, and described arbitrary bar-shaped trough 14 one end open is in nail tail 13, and the other end is opened on nail bar 12 and the bottom land of this end is curved and with opening along concordant;
Described some pair nails 2 one_to_one corresponding insert in bar-shaped trough 14, and the tip 21 of secondary nail 2 at the bottom of the arcuate groove of bar-shaped trough 14 after, be distributed in around nail bar 12 in upwarping shape.
Further, described intramedullary pin also comprises a support bar 3, and described support bar 3 butt end arranges supported hole 31, and the nail bar 12 of main nail 1 passes supported hole 31 and support bar 3 intersects in 135 ° of angles with nail bar 12.To those skilled in the art, the intersecting angle of support bar and nail bar can fixed position different and selecting as required, such as select other angles etc.
Further, the hole inwall of described supported hole 31 arranges the open slot 32 corresponding with the bar-shaped trough 14 followed closely on bar 12.Described bar-shaped trough and open slot one_to_one corresponding, what form secondary nail passes passage.Described bar-shaped trough is identical with the quantity of open slot, and one_to_one corresponding.
Again further, the taper end of described support bar 3 is provided with pressurization fixing hole and fixing hole.For adopting screw, support bar is fixed on backbone.
Preferably, the opening of described bar-shaped trough 14 on nail bar 12 is 1/1 to three/5th nail pole length apart from the distance of ailhead 11.
Preferably, described bar-shaped trough 14 is semi-circular groove.Those skilled in the art can also select the bar-shaped trough of other shapes as required, and such as cross section is rectangle etc.In this utility model, bar-shaped trough can only at both ends open, the middle duct for nail bar inside; Also can bar-shaped trough opening on the whole, if this bar-shaped trough can meet secondary nail through, and make the tip of secondary nail inserting in bone in upwarping shape through after this bar-shaped trough.
Preferably, the number of described bar-shaped trough 14 is three.Those skilled in the art can also select other quantity, such as four etc.
Preferably, described nail tail 13 end face arranges interior hex slot 15.Those skilled in the art can also select the inside groove of other shapes, and this groove is mainly used in intramedullary pin to be screwed in bone, and it can adopt the inside groove of other routines, such as cross bath etc.
Preferably, described nail bar 12 is cylindrical.Those skilled in the art can also select the nail bar of other shapes.
Preferably, the making material of described intramedullary pin is titanium alloy.Those skilled in the art can also select other to make material, such as rustless steel etc.
Axle center arranges through hole 16 to intramedullary pin described in this utility model.This through hole is convenient to the insertion of Kirschner wire, for guiding etc.
In this utility model, nail bar can arrange screw thread, and when arranging screw thread, this intramedullary pin can be screwed in bone, and nail bar also can not arrange screw thread, and when not arranging screw thread, nail bar directly knocks in bone.
This utility model is mainly applicable to the intertrochanteric fracture, humeral fracture etc. of osteoporosis patient.
Concrete using method of the present utility model is: for intertrochanteric fracture, first knochenbruch 5 is resetted, bone 4 is looked for suitable some punching position, then support bar 3 is inserted in femur, punch for the oblique femoral head of supported hole 31 again and adopt Kirschner wire to locate, the through hole 16 of main nail positions through Kirschner wire and is screwed into main nail, then secondary nail 2 is squeezed into successively in the passage formed at bar-shaped trough 14 and open slot 32, this kind of fixed form can be more firm, is especially applicable to the patient with sufferers of osteoporosis face and inner cortex instability.
This utility model is compared to prior art, and its advantage is: intramedullary pin is designed to main nail and secondary nail by this utility model, and secondary nail is used for further being fixed main nail, and the intramedullary pin that can prevent sufferers of osteoporosis face from causing because sclerotin is shaky loosens.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model intramedullary pin;
Fig. 2 be in Fig. 1 A-A to sectional view;
Fig. 3 is the structural representation of this utility model support bar;
Fig. 4 is the result of use figure of this utility model intramedullary pin to fracture fixation;
Reference numeral: 1, main nail; 11, ailhead; 12, bar is followed closely; 13, tail is followed closely; 14, bar-shaped trough; 15, hex shaped groove; 16, through hole; 2, secondary nail; 21, most advanced and sophisticated; 3, support bar; 31, supported hole; 32, open slot; 4, bone; 4, knochenbruch.
Detailed description of the invention
With the drawings and specific embodiments, this utility model is described in further detail below.
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, a kind of wing intramedullary pin, described intramedullary pin comprises main nail 1 and three secondary nails 2;
Described main nail 1 comprises ailhead 11, nail bar 12 and nail tail 13, described nail bar 12 is arranged three bar-shaped troughs 14, and described arbitrary bar-shaped trough 14 one end open is in nail tail 13, and the other end is opened on nail bar 12 and the bottom land of this end is curved and with opening along concordant;
Described pair nail 2 one_to_one corresponding insert in bar-shaped trough 14, and the tip 21 of secondary nail 2 at the bottom of the arcuate groove of bar-shaped trough 14 after, be distributed in around nail bar 12 in upwarping shape.
Described intramedullary pin also comprises a support bar 3, and described support bar 3 butt end arranges supported hole 31, and the nail bar 12 of main nail 1 passes supported hole 31 and support bar 3 intersects in 135 ° of angles with nail bar 12.The hole inwall of described supported hole 31 is arranged the open slot 32 corresponding with the bar-shaped trough 14 on nail bar 12.Described bar-shaped trough and open slot one_to_one corresponding, what form secondary nail passes passage.The taper end of described support bar 3 is provided with pressurization fixing hole and fixing hole.For adopting screw, support bar is fixed on backbone.
The opening of described bar-shaped trough 14 on nail bar 12 is 1/4th nail pole lengths apart from the distance of ailhead 11.Described bar-shaped trough 14 is semi-circular groove.Described nail tail 13 end face arranges interior hex slot 15.Described nail bar 12 is cylindrical.The making material of described intramedullary pin is titanium alloy.
Axle center arranges through hole 16 to intramedullary pin described in this utility model.This through hole is convenient to the insertion of Kirschner wire, for guiding etc.
As shown in Figure 4, concrete using method of the present utility model is: for intertrochanteric fracture, first knochenbruch 5 is resetted, bone 4 is looked for suitable some punching position, then support bar 3 is inserted in femur, punch for the oblique femoral head of supported hole 31 again and adopt Kirschner wire to locate, the through hole 16 of main nail positions through Kirschner wire and is screwed into main nail, then secondary nail 2 is squeezed into successively in the passage formed at bar-shaped trough 14 and open slot 32, this kind of fixed form can be more firm, is especially applicable to the patient with sufferers of osteoporosis face and inner cortex instability.
It should be noted last that, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted.Although be described in detail this utility model with reference to embodiment, will be understood by those skilled in the art that, the technical solution of the utility model is modified or equivalent replacement, do not depart from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.