초록 ▼

A ventilation system supplies a gas mixture that is humidified and heated through a proportional valve which is a fail closed and normally closed servo control valve positioned proximate a patient. The proportional valve is operated by a controller that regulates the pressure and the mode (e.g., hig

A ventilation system supplies a gas mixture that is humidified and heated through a proportional valve which is a fail closed and normally closed servo control valve positioned proximate a patient. The proportional valve is operated by a controller that regulates the pressure and the mode (e.g., high frequency, normal respiration, combinations) gas is delivered to the patient through a nozzle connected to the endotracheal tube. The nozzle has an exhaust connected to it and a pressure sensor through a pressure sensing port. The exhaust is a capped corrugated tube that is heated and perforated to allow air to escape, to muffle gas and respiration noises, and to trap moisture.

대표청구항 ▼

[ What is claimed is:] [1.]1. A ventilation system for supplying gas to a patient, said ventilation system comprising:a first source for supplying a first gas;a second source for supplying a second gas;mixing means connected to said first source to receive said first gas therefrom and to said second

[ What is claimed is:] [1.]1. A ventilation system for supplying gas to a patient, said ventilation system comprising:a first source for supplying a first gas;a second source for supplying a second gas;mixing means connected to said first source to receive said first gas therefrom and to said second source to receive said second gas therefrom, said mixing means having an outlet and said mixing means being operable for mixing said first gas and said second gas together into a gas mixture and being operable to supply one of said first gas, said second gas and said gas mixture at said outlet as a breathable gas;processing means for heating and humidifying said breathable gas, said processing means being connectable to receive said breathable gas from said mixing means and to supply a processed gas;a proportional valve connected to said processing means to receive said processed gas therefrom, said proportional valve being adapted to be positioned proximate a patient and said proportional valve being operable to regulate the pressure of the processed gas and to regulate the mode in which the processed gas is delivered to the patient;a nozzle having an interior channel with a first end for connection to an endotracheal tube for positioning in the trachea of a patient and a second end opposite said first end, said nozzle having a first port for connection to receive said processed gas from said proportional valve and to supply said processed gas to said channel and a second port in communication with said channel to sense the pressure of gas in said channel;exhaust means connected to said second end to exhaust gas from said patient, said exhaust means including a tube having an interior perimeter and a plurality of corrugations in which the corrugations have a minor dimension and a major dimension, said corrugations being sized to collect liquid-like materials from said exhaust gas, said tube further having a plurality of holes spaced apart about said perimeter proximate said minor dimension for the passage of gas from interior said exhaust means to exterior said exhaust means;pressure sensing means connected to said second port for sensing the gas pressure in said channel and to supply a signal reflective of the gas pressure in said channel;control means electrically connected to said pressure sensing means for receiving said signal reflective of the gas pressure in said channel, electrically connected to said mixing means to supply mixing signals thereto to cause said mixing means to supply said breathable gas and electrically connected to said proportional valve to supply operational signals thereto to select the pressure and the mode said processed gas is delivered to said nozzle;input means associated with said control means for selecting a desired breathable gas and for selecting the pressure and the mode of processed gas to be delivered to said nozzle; anddisplay means associated with said control means for displaying to a user symbols reflective of the gas pressure in said channel, symbols reflective of the breathable gas and symbols reflective of the pressure and mode of the processed gas delivered to said nozzle.