Coaxial breathing circuit
US4637384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Feb 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/912
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A coaxial breathing circuit is disclosed and which includes an inner tube for supplying fresh gas to a patient, which may contain a vaporized anesthetic for anesthetizing the patient, and a corrugated outer tube for conducting the patient's exhaled gases from the patient. At the patient end, there is allowed a slippage between the inner and outer tubes to provide flexibility of the overall circuit to bending. At the the machine end, the end that is connected to a mahcine supplying the inspiratory gas, a connector provides the means to join the inner and outer tubes to a male coupling or directly to a male fitting on the machine. The corrugated outer tube is joined to the connector and an outlet is provided for the discharge of the exhaled gases. For the coaxial circuit to be operable, the inner tube is sandwiched between the outer diameter of the male coupling and the inner diameter of an opening in the connector. In such way, in the event the inner tube becomes disconnected from the male coupling, the entire connector no longer can maintain its connection to the machine and the coaxial circuit drops off completely, thus the possibility of an inadvertent disconnection from the supp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.