초록 ▼

A respirator for use in replacing or assisting the respiratory function in patients in whom spontaneous respiration is either absent or insufficient is described. The respirator includes a respirator conduit having a downstream end which is attachable to a proximal end of a patient tube. A respirato

A respirator for use in replacing or assisting the respiratory function in patients in whom spontaneous respiration is either absent or insufficient is described. The respirator includes a respirator conduit having a downstream end which is attachable to a proximal end of a patient tube. A respiratory gas line is connected to a downstream section of the conduit and opens into the conduit at a first location adjacent but upstream of the downstream end. An axially extending driving gas nozzle is provided to direct pulses of driving gas toward the downstream end from a second location upstream of the first location.

대표청구항 ▼

A respirator including: a flexible patient duct having a distal end, for insertion into the trachea of a patient, and a proximal end; a flexible respirator conduit having an upstream conduit section, a downstream conduit section connected to and communicating with the patient duct proximal end and a

A respirator including: a flexible patient duct having a distal end, for insertion into the trachea of a patient, and a proximal end; a flexible respirator conduit having an upstream conduit section, a downstream conduit section connected to and communicating with the patient duct proximal end and an intermediate conduit section connection the upstream and downstream conduit sections; a respiratory gas line connected to and opening into the downstream conduit section of the respirator conduit at a first location adjacent but upstream of the downstream end thereof for supplying relatively low pressure respiratory gas into the respirator conduit at the first location; a first nozzle supported in the intermediate conduit section and extending axially thereof so as to be directed toward the downstream end of the respirator conduit; a chopper device; a first pressure regulator connected to the chopper device; first switching means; a driving gas supply line having a main line and a branch line; a first conduit connected to said first nozzle; the main line connecting with said first pressure regulator; the main line extending in connecting communication from the first pressure regulator to said chopper device and then from said chopper device to the first switching means and then to the first conduit connected to the first nozzle; the main driving gas line being for supplying driving gas to the driving gas first nozzle via the first pressure regulator and the chopper device to direct pulses of driving gas axially of the respirator conduit towards the downstream end of the respirator conduit from a second location upstream of the first location for driving respiratory gas supplied via the respiratory gas main line into a patient\s lungs via the patient duct; a second nozzle supported in the respirator conduit and directed axially thereof toward the downstream end thereof; a second conduit connected to the second nozzle; a second pressure regulator; second switching means; the driving gas supply branch line connecting with the second pressure regulator and connecting the second pressure regulator to the second switching means and then to the second conduit connected to the second nozzle; the second nozzle being connected to the driving gas branch line for supplying a continuous flow of driving gas to enable operation of the respirator with a positive end expiratory pressure; a third nozzle supported in the respirator conduit and directed axially thereof toward the upstream end thereof; a second gas conduit connecting the switching means and the third nozzle; the third nozzle being connected to the driving gas branch line via the third gas conduit for supplying a continuous flow of driving gas to enable operation of the respirator with a negative end expiratory pressure; the second switching means being for switching the supply of driving gas between the second and third nozzles; a fourth, overdrive, nozzle supported in the respirator conduit so as to extend axially thereof towards the downstream end thereof, the fourth nozzle being connected to the first switching means in the main driving gas line, and the fourth nozzle having a wider bore than the first nozzle for providing a higher driving gas pressure for generation of a tidal volume; the first switching means being for switching the driving gas main line supply between the first and fourth nozzles; a one-way volume meter means communicating with the respirator conduit for monitoring the tidal flow of gas therein and means providing an alarm if the supply of a predetermined minimum gas volume to the patient is not achieved; an airway pressure pipe connected at the downstream end of the respirator conduit and extending into the patient duct; and an airway pressure measuring and alarm device connected to the airway pressure pipe for measuring the pressure in the patient duct and for providing an alarm if the measured pressure is outside predetermined limtis.