Surgery – Respiratory method or device – Ozone or ion generation
Patent
1980-08-25
1982-12-21
Truluck, Dalton L.
Surgery
Respiratory method or device
Ozone or ion generation
A61M 514
Patent
active
043643833
ABSTRACT:
A flashback indicator which is integrally formed in a parenteral solution or blood set to serve as a patency check device. A length of clear plastic tubing having an enlarged portion is integrally connected in a parenteral fluid or blood set in such a manner that a patency check can be made without fear of the indicator becoming disconnected from the set during the supplementary administration of a drug such as by means of a hypodermic syringe. In a preferred manner, the flashback indicator is formed from bubble-like tubing wherein the wall thickness of the enlarged portion of the bubble is at least as large as that of the tubing in the set having a smaller and constant diameter.
REFERENCES:
patent: 2702036 (1955-02-01), Bent
patent: 2758598 (1956-08-01), Cutter
patent: 2868200 (1959-01-01), Gewecke
patent: 3429311 (1969-02-01), Wickett
patent: 3674404 (1972-07-01), Burlis et al.
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