Parenteral device

Details Parenteral device Parenteral device

1989-06-14

1993-04-13

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604195, 604240, A61M 532

Patent

active

052017184

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a parenteral device for the transfer of fluids to, or from a living body.
Throughout this specification the term "parenteral device" shall be taken to include hypodermic syringes, cannulas and like devices which may be used for passively introducing or withdrawing fluids from a living body.
It is the primary characteristic of parenteral devices that a sharp hollow needle be provided to facilitate the transfer of fluids to, or from a body. The difficulty created by the presence of such a needle arises from the possibility of injury which may be caused to a user or clinician when using the device or any person who may be required to handle the device before or subsequent to use. It will be appreciated however that the dangers resulting from possible injury are surpassed by the dangers of infection that may arise from such injury due to the presence of the pathogens which may be present on the needle as a result of its usage. Furthermore this danger does not disappear at the conclusion of the utilization of the parenteral device but is always present while the device remain in existence which has resulted in very careful disposal procedures being adopted in institutions where such parenteral devices are used. Such precautions, however, are not necessarily adopted where parenteral devices are used in out-of-clinic situations such as instances where the user is required to inject themselves with a parenteral.
It is an object of this invention to provide a parenteral device which can reduce the possibility of injury and subsequent infection from a used device.
In one form the invention resides in a parenteral device comprising a hollow body having a wall which defines a chamber; a passageway formed through a portion of the wall, said portion of the wall being fixed in relation to the body; an opening provided at the outer end of the passageway; a needle body comprising a needle having a lumen, a first aperture at one end; the needle body being slidable within the body; a second aperture in the wall of the needle body which opens into the lumen of the needle; the needle body further comprising an axial extension supported from the other end of the hollow needle, said axial extension having a handle means to enable manual manipulation to effect the slidable movement of the needle body in the body; the needle body being slidable from a first position at which the one end of the needle extends through the passageway beyond the opening and at which the needle is sealingly received in the passageway; to a second position at which the one end of the needle is located inward from the opening; the needle body also being slidable from the second position to the first position; the second aperture in the wall of the needle body providing communication between the chamber and the lumen of the needle when the needle body is in the first position; and a seal provided between the body and the axial extension to slidably and sealingly engage the axial extension between the second aperture and the handle means.
The invention will be more fully understood in the light of the following description of one specific embodiment. The description is made with reference to the accompanying drawing of which:
FIG. 1 is a schematic side of a syringe according to the first embodiment having the needle in the first position;
FIG. 2 is a schematic sectional elevation of a syringe according to the first embodiment having the needle in a second position;
FIG. 3 is a sectional side elevation of a syringe according to the second embodiment having the needle in the first position;
FIG. 4 is a sectional side elevation of a syringe according to the second embodiment having the needle in the second position;
FIG. 5 is a sectional side elevation of a cannula according to the third embodiment having the needle in the second position;
FIG. 6 is a sectional side elevation of the cannula of the third embodiment having the needle in the first position;
FIG. 7 is a sectional side elevation of a cannula according to the fourth embodi

REFERENCES:
patent: 2752919 (1956-07-01), Gabriel
patent: 2833280 (1958-05-01), Hein, Jr.
patent: 3527216 (1970-09-01), Snyder
patent: 3548626 (1971-06-01), Johannson
patent: 4316463 (1982-02-01), Schmitz et al.

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