CN201283135Y

CN201283135Y - Stylet for lien needle

Info

Publication number: CN201283135Y
Application number: CNU2008201233757U
Authority: CN
Inventors: 王幸明
Original assignee: SHANGHAI JINZE XIABEN MEDICAL INSTRUMENT Co Ltd
Current assignee: SHANGHAI JINZE XIABEN MEDICAL INSTRUMENT Co Ltd
Priority date: 2008-11-06
Filing date: 2008-11-06
Publication date: 2009-08-05
Anticipated expiration: 2018-11-06

Abstract

The utility model relates to a needle core for an indwelling needle, wherein a structure of projection and or sunken area is arranged on the needle core external circle surface of the fixing end on the back end of the needle core. Two symmetrical incline planes which are symmetrical with a main incline plane are arranged below the main incline plane of a needle point structure, and are slanted from the external upper direction to the internal lower direction, and the conventional point end of the needle point structure is slanted toward the external back direction to form a new needle point structure. A side hole structure which penetrates inside and outside the tube structure of the needle core is arranged on the intermediate section thereof. The needle core for the indwelling needle after being use can assure the enough connecting strength between the needle core and a needle core tail handle, avoids the phenomenon of dropping the needle core tail handle, prevents medical accidents caused by the dropping of the needle core tail handle, reduces the wound surface of human organism on the puncture part, shortens the healing time, can fast and reliably observe the blood returning, is convenient for the puncture operation of medical personnel, and has excellent use effect in the venous transfusion of the medical field.

Description

The remaining needle nook closing member

Technical field

This utility model relates to the indwelling needle assembly that a kind of medical infusion is used, particularly a kind of remaining needle nook closing member.

Background technology

The remaining needle that medical transfusion is used, the puncture nook closing member and the sleeve pipe that is placed in the nook closing member outside that comprise steel, because after can using puncture nook closing member puncture vein blood vessel, remove nook closing member and only that softness is frivolous sleeve pipe is retained in intravenous infuses, and can be retained in intravenous some days, therefore be particularly suitable for infusing repeatedly, old, immature and do not have a patient of sense of independence, can also alleviate the workload of medical worker's venipuncture greatly, one of medical apparatus and instruments that has often used when remaining needle has become the medical field venous transfusion now.Special handling is not passed through on the surface, junction of remaining needle nook closing member and nook closing member caudal peduncle at present, still keep making the original smooth surface of steel pipe of nook closing member, therefore cause nook closing member to be connected insecure with the nook closing member caudal peduncle, the nook closing member caudal peduncle comes off from nook closing member sometimes, cause and thrust the venous nook closing member and can't normally take out, and form malpractice.

The utility model content

For the nook closing member that solves existing remaining needle is connected insecure with the nook closing member caudal peduncle, cause the problem that comes off easily, the utility model proposes a kind of nook closing member caudal peduncle and do not allow caducous remaining needle nook closing member, the technical scheme that is adopted is: the remaining needle nook closing member, adopt hollow tubular structure, comprise that the nook closing member front end is intersected the conventional most advanced and sophisticated needle point structure that has that constitutes by main clinoplain and nook closing member outer surface, interlude between the stiff end of nook closing member rear end and needle point structure and the stiff end, the nook closing member outer round surface of stiff end is provided with the structure of projection and/or depression.

The structure of projection and/or depression is point-like, strip or cyclic structure.

Constitute the below of the main clinoplain of needle point structure, be provided with 2 symmetrical inclined-planes that are symmetrical in the main clinoplain plane of symmetry, the symmetry inclined-plane is with respect to the plane of symmetry of main clinoplain, inwardly tilt the below by outer top, and by the most advanced and sophisticated outwards rear inclination of the routine of needle point structure, described 2 symmetrical inclined-planes intersect at the new tip of needle point structure formation at the plane of symmetry of main clinoplain, and new most advanced and sophisticated radial position is in the most advanced and sophisticated inboard of routine, and newly most advanced and sophisticated axial location is at the rear side at conventional tip.

The distance of new distance between two tips needle point structure outer round surface is less than the wall thickness of nook closing member tubular structure.

Interlude is provided with and connects the inside and outside side opening structure of nook closing member tubular structure.

The side opening structure is along the length of the nook closing member axis direction width greater than the side opening structure.

The side opening structure is positioned at the nook closing member surface, and the bottom has the sunk structure of the flat bottom that intersects with the nook closing member endoporus.

The degree of depth of sunk structure less than two of nook closing member external diameter/.

This utility model remaining needle with the technique effect that nook closing member adopts technique scheme to obtain is: the stiff end of nook closing member afterbody is provided with the structure of projection and/or depression, the surface and the nook closing member caudal peduncle that can guarantee stiff end are connected firmly, and avoid in use taking place the accident that caudal peduncle comes off.

The structure of projection and/or depression adopts point-like, strip or cyclic structure, can select the suitable rat and/or the structure of depression according to operating position and processing conditions, guarantees to be connected with the firm of caudal peduncle.

Needle point structure is provided with 2 symmetrical inclined-planes, make the new tip of needle point structure be positioned at the inboard of needle point structure outer round surface, new tip is not contacted with internal surface of sleeve pipe, and can make the outer round surface at new most advanced and sophisticated place have minus cutting edge, make nook closing member and sleeve pipe when assembling and use, can not stab internal surface of sleeve pipe in the sleeve pipe slides forwards, and make casing damage or produce burr, cause remaining needle to scrap or form accident potential because of needle point structure; Make the centrage of point of puncture simultaneously, make the wound surface of site of puncture tissue less, make puncture and cause painful less, and it is hemorrhage to reduce wound surface, accelerate wound healing near nook closing member.

The distance of new distance between two tips needle point structure outer round surface, less than the tubular structure wall thickness of nook closing member, can adjust the distance of new tip and needle point structure outer round surface in the larger context according to operating position and processing conditions, guarantee not damage internal surface of sleeve pipe, reduce the wound surface of site of puncture tissue.

The middle part of nook closing member is provided with and connects the inside and outside side opening structure of nook closing member tubular structure, when piercing blood vessel, blood back can arrive the surface of cover pipe orifice by the capillarity of side opening structure rapidly, make the medical worker in time see through the blood back that transparent or semitransparent sleeve pipe is seen side opening structure place, make things convenient for puncture procedure.

The side opening structure can make the side opening structure show that the area of blood back is bigger along the length of the nook closing member axis direction width greater than the side opening structure, is convenient to medical worker's observation.

The side opening structure is positioned at the nook closing member surface, and the bottom has the sunk structure of the flat bottom that intersects with the nook closing member endoporus, and the simplest method easy to use processes the side opening structure that meets instructions for use.

The degree of depth of sunk structure is less than 1/2nd of the nook closing member external diameter, and the cross section that blood back is passed through is bigger, accelerates the speed of blood back, and guarantees nook closing member in the position that has the side opening structure, not the existence of reason side opening structure and intensity reduces too much.

Use remaining needle nook closing member of the present utility model, can guarantee that nook closing member and nook closing member caudal peduncle have enough bonding strengths, avoid taking place the phenomenon that the nook closing member caudal peduncle comes off, therefore prevent and the malpractice that produces, and can reduce the wound surface of site of puncture tissue, shorten healing time, can observe to fast and reliable blood back, make things convenient for medical worker's puncture procedure, make remaining needle in the venous transfusion of medical field, have better result of use.

Description of drawings

Fig. 1 is the front view of this utility model remaining needle with a kind of structure of nook closing member.

Fig. 2 is the side view of this utility model remaining needle with a kind of structure of nook closing member.

Fig. 3 is the front view of this utility model remaining needle with the another kind of structure of nook closing member.

Fig. 4 is the side view of this utility model remaining needle with the another kind of structure of nook closing member.

Fig. 5 is that this utility model remaining needle is looked enlarged drawing with the right side of Fig. 1 of nook closing member.

Fig. 6 is the A-A cutaway view Amplified image of this utility model remaining needle with Fig. 1 of nook closing member.

Fig. 7 is the B position enlarged drawing of this utility model remaining needle with Fig. 1 of nook closing member.

The specific embodiment

This utility model remaining needle uses the high-quality seamless stainless steel pipe manufacturer of making general entry needle with nook closing member, adopt hollow tubular structure, as shown in Figures 1 to 4, comprise the needle point structure 1 of nook closing member front end, the stiff end 2 of nook closing member rear end and the interlude 3 between needle point structure and the stiff end.The nook closing member outer round surface of stiff end 2 is provided with the structure 21 of projection and/or depression, can be the structure of point-like, strip or cyclic projection, depression, adopts method processing such as sandblast, mechanical frosted, chemical sanding, laser, electric spark, roll extrusion or extruding.Under the prerequisite that guarantees nook closing member and nook closing member caudal peduncle bonding strength, the raised or sunken height of the nook closing member outer round surface of stiff end 2 should be got less numerical value, cutting down finished cost, and reduces surface irregularity and the stress concentration phenomenon that causes.

Fig. 5 to Fig. 7 has represented the needle point structure of this utility model remaining needle with nook closing member, when processing the needle point structure 1 of nook closing member, at first by the method for making general nook closing member, make main clinoplain 12 to form conventional tip 14 at the head of nook closing member, main clinoplain 12 is preferably 18 degree ± 1 degree with the inclination angle 121 of nook closing member axis.Below main clinoplain 12, process 2 symmetrical inclined-planes 13 that are symmetrical in the main clinoplain plane of symmetry, symmetry inclined-plane 13 is with respect to the plane of symmetry of main clinoplain 12, inwardly tilt the below by outer top, on the section of position perpendicular to the nook closing member axis at 13 places, 2 symmetrical inclined-planes, 2 symmetrical inclined-planes 13 are preferably 28 degree ± 5 degree with the intersection 133 of this section and the inclination angle 131 of the main clinoplain plane of symmetry.Symmetry inclined-plane 13 is with respect to the plane of symmetry of main clinoplain 12, tilted by the conventional most advanced and sophisticated 14 outside rears of needle point structure 1, and the inclination angle 132 of 2 symmetrical inclined-planes and nook closing member axis is preferably 28 and spends ± 3 and spend.

2 symmetrical inclined planes 13 intersect in the main clinoplain plane of symmetry in conventional most advanced and sophisticated 14 the scope of needle point structure 1, constitute new most advanced and sophisticated 11 of needle point structure 1, new most advanced and sophisticated 11 radial position is in conventional most advanced and sophisticated 14 inboard, new most advanced and sophisticated 11 axial location is at conventional most advanced and sophisticated 14 rear side, new most advanced and sophisticated 11 distances 111 apart from needle point structure outer round surface 15, less than the wall thickness of nook closing member tubular structure, be preferably 0.03 millimeter to 0.3 millimeter.

The pars intermedia of nook closing member is processed with and connects the inside and outside side opening structure 31 of nook closing member tubular structure, and side opening structure 31 is along the length of the nook closing member axis direction width greater than side opening.Preferred side opening structure 31 is positioned at the nook closing member surface, the bottom has the sunk structure of the flat bottom that intersects with the nook closing member endoporus, can utilize mill, grind, dig, shave, processing mode such as laser, electric spark makes, the degree of depth of sunk structure is preferably 1/3rd to 2/5ths of nook closing member external diameter less than 1/2nd of the nook closing member external diameter.Fig. 1, Fig. 2, Fig. 3, Fig. 4 have represented the side opening structure of 2 kinds of forms respectively.

Remaining needle nook closing member of the present utility model on the basis of the foregoing description, adopts the embodiment that method produced of replacement or conversion, all within protection domain of the present utility model.

Claims

1, remaining needle nook closing member, adopt hollow tubular structure, comprise that the nook closing member front end is intersected the conventional most advanced and sophisticated needle point structure that has that constitutes by main clinoplain and nook closing member outer surface, interlude between the stiff end of nook closing member rear end and needle point structure and the stiff end is characterized in that: the nook closing member outer round surface of stiff end is provided with the structure of projection and/or depression.

2, the described remaining needle nook closing member of claim 1 is characterized in that: the structure of described projection and/or depression is point-like, strip or cyclic structure.

3, the described remaining needle nook closing member of claim 1, it is characterized in that: the below that constitutes the main clinoplain of needle point structure, be provided with 2 symmetrical inclined-planes that are symmetrical in the main clinoplain plane of symmetry, the symmetry inclined-plane is with respect to the plane of symmetry of main clinoplain, inwardly tilt the below by outer top, and by the conventional tip of needle point structure backward foreign side tilt, described 2 symmetrical inclined-planes intersect at the new tip of needle point structure formation at the plane of symmetry of main clinoplain, the radial position at described new tip is in conventional most advanced and sophisticated inboard, and the axial location at described new tip is at conventional most advanced and sophisticated rear side.

4, the described remaining needle nook closing member of claim 3 is characterized in that: the distance of described new distance between two tips needle point structure outer round surface, and less than the wall thickness of nook closing member tubular structure.

5, the described remaining needle nook closing member of claim 1 is characterized in that: the interlude of nook closing member is provided with and connects the inside and outside side opening structure of nook closing member tubular structure.

6, the described remaining needle nook closing member of claim 5 is characterized in that: described side opening structure is along the length of the nook closing member axis direction width greater than the side opening structure.

7, the described remaining needle nook closing member of claim 5, it is characterized in that: described side opening structure is positioned at the nook closing member surface, and the bottom has the sunk structure of the flat bottom that intersects with the nook closing member endoporus.

8, the described remaining needle nook closing member of claim 7, it is characterized in that: the degree of depth of described sunk structure is less than 1/2nd of the nook closing member external diameter.