Heated respiratory humidifier conduit

Details Heated respiratory humidifier conduit Heated respiratory humidifier conduit

1994-11-22

1996-07-23

Burr, Edgar S.

Surgery

Respiratory method or device

Means for heating respiratory gas or respiration device

392398, 392401, A61M 1616

Patent

active

055379966

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.

REFERENCES:
patent: 3249108 (1966-05-01), Terman
patent: 4922901 (1990-05-01), Brooks et al.
patent: 5392770 (1995-02-01), Clawson et al.

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