Injection apparatus and method with automatic aspiration feature
First Claim
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1. An intramuscular injection system comprising:
- a. housing meansb. needle means in said housing mounted for linear movement in a first direction from a retracted position in the housing to a position protruding forwardly out of said housing,c. linearly movable chemical medication chamber means in said housing having a rupturable portion in alignment with said needle means such that said needle means will rupture said medication chamber means upon selective relative movement of said needle and medication chamber means,d. fluid propulsion means adapted to effect said selective relative movement of said needle means and medication chamber means and to effect linear movement of said needle means between said retracted and protruding positions, ande. aspirating means for automatically creating a partial vacuum in said medication chamber means after said needle has been moved into its protruding position.
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Abstract
An apparatus for intramuscular or subcutaneous injection of medications featuring automatic aspiration capability is disclosed herein. In a preferred embodiment the apparatus is completely self-contained, i.e., all components required for injection including antiseptic, antiseptic applicator, sterile needle of appropriate gauge and length, sterile medication in unit dose form, means of automatically inserting the hypodermic needle in tissues of the injection site, unique means of automatic aspiration, and means of automatically injecting said unit dose are contained within the subject invention. An injection method and a method for automatic aspiration are also disclosed herein.
47 Citations
9 Claims
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1. An intramuscular injection system comprising:
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a. housing means b. needle means in said housing mounted for linear movement in a first direction from a retracted position in the housing to a position protruding forwardly out of said housing, c. linearly movable chemical medication chamber means in said housing having a rupturable portion in alignment with said needle means such that said needle means will rupture said medication chamber means upon selective relative movement of said needle and medication chamber means, d. fluid propulsion means adapted to effect said selective relative movement of said needle means and medication chamber means and to effect linear movement of said needle means between said retracted and protruding positions, and e. aspirating means for automatically creating a partial vacuum in said medication chamber means after said needle has been moved into its protruding position. - View Dependent Claims (2, 3, 4, 5)
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6. A method of injecting medication comprising the steps of:
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1. fluidically moving a rupturable medication chamber into an end of a hypodermic needle so that the needle penetrates the chamber, 2. fluidically advancing the medication chamber and needle into the object to be medicated, 3. automatically creating a partial vacuum in said needle, and - View Dependent Claims (8)
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- 7. subsequently fluidically forcing medication from said chamber, through said needle and into the object to be medicated.
Specification