Parenteral device

Details Parenteral device Parenteral device

1993-01-11

1995-06-20

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604187, 604195, A61M 524, A61M 528

Patent

active

054257220

DESCRIPTION:

BRIEF SUMMARY
THIS INVENTION relates to a parenteral device which may take the form of a syringe or similar parenteral dispensing device or a cannula.
In the use of syringes, cannulas and the like which utilise sharp hollow needles there has been significant awareness recently of the dangers which exist as a result of the usage and disposal of these devices. The evidence of such dangers resides in the frequency with which users of the devices are inadvertently pricked. Such an injury can result in the transmission of disease.
As a result of these difficulties users of parenteral devices such as medical clinics, hospitals and the like apply very stringent procedures in the storage, use and disposal of parenteral devices which utilise sharp needles. However, despite such very stringent procedures it is a regular occurrence for professional users to be inadvertently pricked.
In addition there is a need for the parenteral devices such as syringes to be generally available to patients for the self application of parenteral agents to those patients. This is particularly the case where patients are required to regularly administer to themselves agents which must be regularly administered and can only be administered by hypodermic or intravenous injection. As a result it is necessary for such users to have readily available to them ampoules which store the active agent, syringes and needles. When administration is required the users must assemble the syringe, fill the syringe with the parenteral agent, inject themselves with the agent and then dispose of the syringe and needle in a responsible manner. In addition when administration is required the user can often be experiencing stress which can make the tasks of assembling the syringe, filling the syringe, injection and disposal of the syringe a difficult exercise.
In addition as a result of the use of illegal drugs which are generally administered intravenously by utilisation of syringes there has arisen considerable difficulty as a result of the inappropriate disposal of such syringes by the users of illegal drugs and the increased danger of transmission of disease due to such syringes being carelessly disposed of or used by a second person.
It is an object of this invention to at least partially alleviate the difficulties that are created by the use and disposal of conventional syringes by professionals, patients and drug users.
In one form the invention resides in a parenteral device comprising a body, said body having a chamber supporting a hollow needle having a pointed one end formed with a first aperture, said needle having a second aperture inward of the first aperture, said needle being supported in the body for slidable movement between a first position and a second position wherein said first position comprises said needle being fully accommodated within the body and said second position comprises said one end of the said needle extending beyond the body, wherein said needle in its movement from the first position to the second position is capable of piercing the chamber and causing the second aperture to be in open communication with the interior of the chamber when the needle is at the second position to allow for flow of parenteral fluid between the chamber and the first aperture through the second aperture.
According to a preferred form of the invention the chamber of the parenteral device comprises a sealed chamber which is variable in volume whereby on the needle being moved to its second position the parenteral agent which is stored within the chamber can be injected by a reduction of the volume of the chamber, In this regard the ejection of the parenteral fluid from the chamber may be effected by the collapse of the chamber as a result of a resilient biassing force such that on the needle being moved to its second position the parenteral agent is automatically ejected through the needle.
In addition means may be provided in the body to interact with the needle such that on the needle having been moved from the first position to the second position its subse

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International Preliminary Examination Report, Apr. 8, 1992.

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