EP0320168A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cassette optical identification apparatus for a medical infusion system
Assignee: Ivac Medical Systems Inc
•
Filing: 1988-11-30
•
Granted: —
•
Expires: 2008-11-30
Abstract
Abstract A cassette identification system for use with a medication infusion system having disposable cassettes which are mounted onto a main pump unit is disclosed which uses an optical sensor module (670) to read identifying bits (148,150,152) on the cassette. The identification indicia contained on the cassette each either pass light through a portion of the cassette, or diffuse the light to prevent it from passing through the cassette. The optical module (670) is mounted on the main pump unit, and includes light sources (686,688,690) and sensors (692,694,696) for each of the identification indicia on the cassette; the system may use either redundant or non-redundant coding for identifying the cassettes.
Inventors
- 👤 Michi E. Garrison
- 👤 John P. Pelmulder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:49
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861; A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/36; A61M5/365; A61M2205/00; A61M2205/12; A61M2205/60; A61M2205/6018; A61M2205/6063; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
An identification system for a disposable cassette installed on a main unit in a medication infusion system characterised by an optical receiving module (670) mounted on the main unit, the optical receiving module (670) having an opening (680) for receiving a portion of the cassette when the cassette is installed onto the main unit; optical signal source means (686,688,690) for providing a plurality of light beams, the optical signal source means (686,688,690) being located in the optical receiving module (670) on one side of the opening (680); optical signal sensor means (692,694,696) for receiving the light beams, the optical signal sensor means (692,694,696) being located in the optical receiving module (670) on the other side of the opening (680), opposite the optical signal source means (686,688,690); and identification means (148,150,152) on the cassette for controlling the passage of the light beams through the cassette from the signal source means (686,688,690) to the optical signal sensor means (692,694,696).
Claim 2
Dependent Claim
157 words
An identification system for a disposable cassette installed on a main unit in a medication infusion system characterised by an optical receiving module (670) mounted on the main unit, the optical receiving module (670) having an opening (680) for receiving a portion of the cassette when the cassette is installed onto the main unit; optical signal source means (686,688,690) for providing a plurality of light beams, the optical signal source means (686,688,690) being located in the optical receiving module (670) on one side of the opening (680); optical signal sensor means (692,694,696) for receiving the light beams, the optical signal sensor means (692,694,696) being located in the optical receiving module (670) on the other side of the opening (680), opposite the optical signal source means (686,688,690); and identification means (148,150,152) on the cassette for controlling the passage of the light beams through the cassette from the signal source means (686,688,690) to the optical signal sensor means (692,694,696).
Claim 3
Dependent Claim
69 words
A system as claimed in Claim 1, characterised in that the optical signal source means (686,688,690) comprises two or three signal sources, the optical signal sensor means (692,694,696) comprises two or three signal sensors, and the identification means (148,150,152) comprises two or three identification elements, respective signal sources and signal sensors and identification elements being aligned, the identification element preferably being located on a projection formed on the cassette.
Claim 4
Dependent Claim
44 words
A system as claimed in Claim 2 characterised in that each identification element (148,150,152) either allows the corresponding light beam to pass through the cassette from the respective signal source (686,688,690) to the respective signal sensor (692,694,696) or prevents the light beam from passing.
Claim 5
Independent Claim
16 words
A system as claimed in any preceding claim characterised in that the system uses redundant coding.
Claim 6
Independent Claim
38 words
A system as claimed in any of Claims 2 to 4, characterised in that at least two of the identification elements (148,150,152) must provide a particular output in order for that output to be considered a valid output.
Claim 7
Dependent Claim
30 words
A system as claimed in Claim 5, characterised in that when two of the identification elements (148,152) provide the said output, the third identification element (150) provides the opposite output.
Claim 8
Independent Claim
30 words
A system as claimed in any preceding claim characterised in that the optical signal source means (686,688,690) are light emitting diodes and/or the optical signal sensor means (692,694,696) are phototransistors.
Claim 9
Independent Claim
72 words
A system as claimed in any of Claims 2 to 7, characterised in that the identification elements (148,152) which pass light do so by conducting light from one side of the projection to the other, and preferably each comprises a cylindrical segment having one end oriented towards one side of the opening (680) in the optical receiving module (670) and having the other end oriented towards the other side of the opening.
Claim 10
Independent Claim
50 words
A system as claimed in any of Claims 2 to 8, characterised in that the identification elements (150) which do not pass light either do so due to the presence on the projection of a material which is opaque to light or means located on the projection for diffusing light.
Claim 11
Dependent Claim
42 words
A system as claimed in Claim 9, characterised in that the means for diffusion light comprises an inverted V (150) moulded into the projection, the inverted V (150) being made of clear material, or a prism which is oriented to diffuse light.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.