CN1258542A

CN1258542A - Disposable self-destructing syringe and its making process

Info

Publication number: CN1258542A
Application number: CN 98126490
Authority: CN
Inventors: 徐彦生; 吕明辉; 李丽朝
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-29
Filing date: 1998-12-29
Publication date: 2000-07-05

Abstract

The present invention belongs to medical equipment and aims at preventing the repeated use of syringe, which is likely to produce cross infection. The disposable self-destructing syringe of the present invention has one self-dissolving piston body pressed with starch material at the front and of the piston and the piston body is softened and deformed to destruct the syringe once the syringe is used. The present invention makes injection safe.

Description

Disposable " type self-destroyed " syringe and preparation method thereof

The present invention relates to a kind of disposable " type self-destroyed " syringe that is applicable to extensive use in health care and the scientific experiments and preparation method thereof, belong to the medical sanitary apparatus field.

Replace the glass syringe that can repeated disinfection uses with the disposable syringe that is being extensive use of at present, be commonly considered as the much progress aspect safety injection.But still there is the place that can not be entirely satisfactory in disposable syringe, and still has the danger that is repeated to use.It is reported repeatedly take place not in accordance with regulations with disposable syringe with after destroy by fire, and re-assembly, sell use and cause the matters of aggravation of cross infection with the waste product syringe of recovery, disposable syringe remains the major hidden danger that causes cross infection.In the disclosed No. 88106765.2 multinomial patent documents such as " Selfdestroying hypodermic syringes " of Chinese patent, " type self-destroyed " syringe that provides all is that the employing mechanism structure reaches the purpose of " self-destruction ", complex structure, performance difficulty, cost height.

Automatically scrap disposable syringe that can not reuse, worthy of the name after the purpose of this invention is to provide a kind of use once---disposable " type self-destroyed " syringe and preparation method thereof.

Realize that the technical scheme that the object of the invention adopted is:

This disposable " type self-destroyed " syringe is made up of inner piston rod, trocar sheath, supporting syringe needle, is characterized in having self-dissolving piston body formation inner carrier at the front end of inner piston rod.

Syringe construction of the present invention is simple, processing and fabricating is easy, cost is low.The medicinal liquid that sucks of syringe immerses the self-dissolving piston body in use, the injection very fast softening transform of back self-dissolving piston body that finishes, and the sealing that loses with trocar sheath can't reuse to syringe is scrapped automatically, has really reached disposable effect.

The structure of trocar sheath, inner piston rod and manufacture method among the present invention, and detection of syringe, sterilization, packing etc. are all similar to the disposable syringe that existing plastic material is made, characteristics are the processing technology of self-dissolving piston body.

The self-dissolving piston body is cylindrical, and front end can be the plane according to the shape of outer sleeve bottom, also can be the conical surface.The self-dissolving piston body is to be primary raw material with starch, is equipped with suitable amount of adhesive, lubricant, becomes highdensity piston body through high pressure compressed in mould, its shape and control by mould with fit dimension of trocar sheath etc.

1, the raw material of self-dissolving piston body and proportioning thereof (by weight):

Excipient (starch) 75-85%

Binding agent (distilled water or pure water) 10-20%

Auxiliary binder (arabic gum) 2-4%

Lubricant (magnesium stearate) 0.5-1%

2, technological process:

After above-mentioned raw materials batch mixing pelletize by weight ratio, drop in the mould, in press, retreat mould through 1.5-5.5 ton pressure press forming.

Accompanying drawing 1 is the structural representation of an embodiment of the present invention.Fig. 2 is the cross-sectional view of inner carrier front end among Fig. 1.Fig. 3 is the cross-sectional view of the inner carrier front end of another kind of embodiment.Among the figure: 1 trocar sheath, 2 inner carriers, 3 inner piston rods, 4 self-dissolving piston bodies, 5 connectors, 6 glue.

This syringe is by trocar sheath (1), have the inner carrier (2) of self-dissolving piston body (4) at inner piston rod (3) front end, and supporting syringe needle is formed by combining.

The self-dissolving piston body can form inner carrier at the front end of the inner piston rod with connector (5) by a press forming, shown in Fig. 2 embodiment; Also can suppress the self-dissolving piston body earlier, the self-dissolving piston rod being sticked with glue at the inner piston rod front end is the front end formation inner carrier of planar inner piston rod again, shown in Fig. 3 embodiment.

Make the embodiment of self-dissolving piston body:

1, raw material and proportioning thereof (percentage by weight):

Corn starch 80%

Distilled water 17%

Magnesium stearate 1%

Arabic gum 2%

2, technological process:

Above-mentioned raw materials by after the pelletize of proportioning batch mixing, is dropped in the mould, and press forming retreats mould in press.

The used pressure of different size syringe is as follows:

1-5 milliliter pressure 5.5-4.5 ton

10-30 milliliter pressure 4-2.5 ton

1.5 tons of 50 milliliters of pressure

The inventor makes disposable " type self-destroyed " syringe of 1 milliliter of-50 milliliters of different size by embodiment, about self-dissolving piston body weight 0.5-40 gram, detect and clinic trial through inside, its every technical performance, sanitary indexs etc. all meet national standards such as existing syringe GB15810-1995, use the injection back to the medicinal liquid self-dissolving piston body of different chemical character all can be in 5-10 minute softening transform, syringe can not be reused once more, the self-dissolving piston body to the adsorbance of medicinal liquid less than ten thousand of medicinal liquid total amount/, simultaneously medicinal liquid is not produced any influence, can fully satisfy the requirement of clinical use.

This disposable " type self-destroyed " syringe will thoroughly be eliminated and cause cross infection hidden danger, be the major progress again of safety injection, make safety injection reach more reliable level.

Claims

1, disposable " type self-destroyed " syringe is made up of inner piston rod, trocar sheath, supporting syringe needle, it is characterized in that having self-dissolving piston body formation inner carrier at the front end of inner piston rod.

2, the manufacture method of disposable " type self-destroyed " syringe, trocar sheath, inner piston rod adopt prior art to make, and it is characterized in that the manufacture method of self-dissolving piston body is as follows:

(1) raw material of self-dissolving piston body and proportioning thereof (by weight):

Excipient (starch) 75-85%

Binding agent (distilled water or pure water) 10-20%

Auxiliary binder (arabic gum) 2-4%

Lubricant (magnesium stearate) 0.5-1%

(2) technological process:

After above-mentioned raw materials batch mixing pelletize by weight ratio, drop in the mould, in press, retreat mould through 1.5-5.5 ton pressure press forming;

(3) the self-dissolving piston body can one time press forming at the front end of inner piston rod with connector; Also can suppress the self-dissolving piston body earlier, the self-dissolving piston body being sticked with glue at the inner piston rod front end again is planar inner piston rod front end.