Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-12-30
1996-11-26
Mendez, Manuel
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
A61M 500
Patent
active
055780148
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to skin-piercing devices for medical use, and to cooling devices.
BACKGROUND OF THE INVENTION
The piercing of skin for purposes of administering medications and taking blood samples is well known in medical practice. Insertion of a needle into the skin is known to be accompanied by a localized sensation of pain. Accordingly, it would be an advantage to desensitize skin into which a needle is being introduced.
Various devices and methods are known in the prior art for local desensitization of skin. Among prior art publications which describe localized desensitization of skin are U.S. Pat. Nos. 2,746,264; 2,982,112; 3,327,713; 3,826,264; 4,614,191 and 4,646,735.
In medical practice there is a known risk of accidental puncture by used hypodermic needles. Such accidents are particularly problematic with the spread of various infectious diseases, such as AIDS and Hepatitis B, which may be transmitted by infected blood.
SUMMARY OF THE INVENTION
The present invention seeks to provide a needle assembly for medical or veterinary use, which has a needle and a retractable sleeve associated with the needle, so as to reduce the risks of accidental puncture by the needle and of contamination of the exposed needle, and so as also to limit the penetration depth of the needle.
The present invention also seeks to provide a skin piercing device which incorporates a skin piercing element and a desensitizing element, and which, when placed against a portion of skin to be pierced, provides desensitization of the skin so as to render a subsequent introduction into the skin of the piercing element less painful.
A further aim of the present invention is to provide a skin piercing device which incorporates a desensitizing element together with an automatic skin piercing element.
There is thus provided, in accordance with a preferred embodiment of the invention, a needle assembly for medical or veterinary use, and which includes a needle having a needle point, and a sleeve associated with the needle,
wherein a predetermined portion of the sleeve has elastic properties in a generally longitudinal direction and is adapted to take up a generally extended state when the assembly is in a non-operative orientation so as to surround the entire length of the needle, and is further adapted to take up a compressed state when the assembly is in an operative orientation, thereby to expose a portion of the needle including the needle point.
Preferably, the portion of the sleeve having elastic properties has the form of either a helical coil or a bellows.
There is also provided, in accordance with a further preferred embodiment of the invention, apparatus for piercing skin including skin piercing apparatus, and a cooling assembly providing a cooled surface associated with the skin piercing apparatus for cooling a portion of skin prior to and during piercing thereof by the skin piercing apparatus.
Additionally in accordance with a preferred embodiment of the invention, the cooling assembly includes a thermoelectric cooling assembly.
Alternatively, the cooling assembly may be a replaceable cooling element adapted to be cooled independently of the apparatus for piercing skin, or fluid cooled apparatus.
Additionally in accordance with a preferred embodiment of the invention, the thermoelectrically cooled surface defines an aperture through which the skin piercing apparatus extends.
In accordance with one embodiment of the invention, the skin piercing apparatus includes a hypodermic syringe.
In accordance with an alternative embodiment of the invention, there is also provided syringe flexible cover apparatus for protecting the needle of the syringe, wherein the cover apparatus is also operative to center the needle along a predetermined axis.
Further in accordance with a preferred embodiment of the invention, there is also provided a housing for the skin piercing apparatus and for the thermoelectric cooling assembly, a shaft mounted in a predetermined orientation in the housing; and means for
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Erez Uri
Singer Yuval
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