Patent US4397945A successfully refreshed from Google Patents.
US4397945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test method and apparatus for the presence of microorganism in syringe
Assignee: EMD Millipore Corp
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Filing: 1981-06-10
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Granted: 1983-08-09
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Expires: 2001-06-10
Abstract
Abstract A method and apparatus for testing the sterility of the contents of a syringe and the sterility of the internal and external surfaces of a needle connected to the syringe or the contents of a syringe and the sterility of the tip of the syringe nipple (in those cases where the syringe is not fitted with a needle). The needle is inserted into a tube by penetrating a small hole in an adaptor connected to one end of the tube. The adaptor includes a recess so that the syringe and needle can be stably positioned relative to the tube. The tube includes a liquid outlet adjacent to the adaptor so that the liquid contents of the syringe exiting from the needle washes the outside surface of the needle or the tip of the syringe needle before leaving the tube. The liquid leaving the tube is cultured and incubated to determine whether microorganisms are present therein.
Inventors
- 👤 Jean Lemonnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:56
CPC Classifications
A; A61; A61M; A61M5/00; C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
Apparatus for testing the sterility of the contents of a syringe and of a needle attached to said syringe which comprises a tube, an adaptor means attached to a first end of said tube, said adaptor means including a small hole, a spout and a recess, said recess adapted to receive and retain said syringe, means for connecting a second end of said tube to a source of a sterile solution in order to establish fluid communication between said tube and said sterile solution source, means to remove the liquid contents of said syringe from said tube through said spout and to direct said liquid into at least one canister adapted to filter said liquid and to grow microorganisms in said liquid in the absence of microorganisms in the surrounding atmosphere.
Claim 2
Dependent Claim
131 words
Apparatus for testing the sterility of the contents of a syringe and of a needle attached to said syringe which comprises a tube, an adaptor means attached to a first end of said tube, said adaptor means including a small hole, a spout and a recess, said recess adapted to receive and retain said syringe, means for connecting a second end of said tube to a source of a sterile solution in order to establish fluid communication between said tube and said sterile solution source, means to remove the liquid contents of said syringe from said tube through said spout and to direct said liquid into at least one canister adapted to filter said liquid and to grow microorganisms in said liquid in the absence of microorganisms in the surrounding atmosphere.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 where in a needle attached to said syringe is positioned through said small hole and axially within said tube, the outer surface of said needle being between about 0.5 mm and 2 mm from the inner surface of said tube.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 including means to direct liquid from said tube to a plurality of sterile containers, each of said sterile containers including filter means for filtering microorganisms from said liquid.
Claim 5
Dependent Claim
146 words
The process for testing the sterility of liquid contents of a syringe, said syringe having a needle attached thereto which comprises forcing said liquid contents from said syringe, through said needle and into a sterile tube, said tube having an inner surface spaced apart from the outer surface of said needle a distance less than about 3 mm, passing the liquid exiting from said needle along the outer surface of said needle within the tube, removing said liquid from said tube by exit means positioned adjacent the point of entry of said needle in said tube, passing said liquid through a filter under sterile conditions, contacting said filter with a growth medium incubating said growth medium and filtered material under sterile conditions and observing any change in said growth medium in order to determine the presence of a microorganism in said liquid or on said needle.
Claim 6
Dependent Claim
146 words
The process for testing the sterility of liquid contents of a syringe, said syringe having a needle attached thereto which comprises forcing said liquid contents from said syringe, through said needle and into a sterile tube, said tube having an inner surface spaced apart from the outer surface of said needle a distance less than about 3 mm, passing the liquid exiting from said needle along the outer surface of said needle within the tube, removing said liquid from said tube by exit means positioned adjacent the point of entry of said needle in said tube, passing said liquid through a filter under sterile conditions, contacting said filter with a growth medium incubating said growth medium and filtered material under sterile conditions and observing any change in said growth medium in order to determine the presence of a microorganism in said liquid or on said needle.
Claim 7
Dependent Claim
13 words
The process of claim 4 wherein said growth medium is a thioglycollate solution.
Claim 8
Dependent Claim
13 words
The process of claim 4 wherein said growth medium is soybean-casein digest medium.
Claim 9
Dependent Claim
12 words
The process of claim 4 wherein said growth medium is Sabouraud medium.
Claim 10
Dependent Claim
42 words
The process of claim 4 wherein said liquid exiting from said tube is formed into aliquots and wherein each aliquot is passed through a separate filter under sterile conditions and each of said filters is contacted with a growth medium and incubated.
References Cited (Backward Citations)
US4036698A
Cited
US4292405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |