Heated respiratory humidifier conduit
US5537996A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A heated respiratory humidifier conduit for use with a respiratory humidifier/ventilator circuit. The conduit consists of an inspiratory tube passing gases from the humidifier/ventilator to the patient and an expiratory tube passing exhaled gases from the patient back to the gases supply. An insulated resistance heating wire runs the full length of the inspiratory tube to reduce condensation forming on the walls of the tube. The return path for the heating wire is supplied by an insulated conductor which also runs the full length of the inspiratory tube and is connected to the heating wire near the patient. This ensures that the voltage of the heating wire is substantially zero volts at the patient end of the conduit, minimizing the interactions with other patient connected equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.