Controllable partial rebreathing anesthesia circuit and respiratory assist device
US4188946A · kind A · utility
Inventors
Key dates
| Filing date | Oct 7, 1977 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Oct 7, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/911
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for administering anesthesia to a patient is shown. A control module may be connected through an inhalation breathing circuit to a patient with a portion of the mixed/expired gases being rebreathed by the patient thus improving humidification and heat retention. By use of a CO.sub.2 analyzer in the control module, the CO.sub.2 content of the expired gas is accurately measured with any necessary adjustments being made in the gases delivered to the patient. The control module includes an O.sub.2 analyzer, adjustable pressure warning and control device, pressure gauge, manually controlled scavenger valve, and bacterial filter connected thereto. An anesthesia ventilator or breathing bag may be used in conjunction with the control module for administering anesthesia or transportation of the patient. The inhalation breathing circuit has two concentric, non-kinking, corrugated tubes, one visually apparent within the other for delivering both fresh gas with a mixed portion of the expired gas to the patient through a special elbow adapter that allows suctioning without interrupting the fresh gas flow or ventilation of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.