Automatic rescue breathing unit with keying system

A rescue breath system, comprising:

• a ventilator device configured to be coupled to an air/oxygen source, the ventilator device comprising:
• a first air channel configured to provide a rate and volume of rescue breaths specified for an adult patient;
• a second air channel configured to provide a rate and volume of rescue breaths specified for a child patient;
• a third air channel configured to provide a rate and volume of rescue breaths specified for an infant patient;
• a fourth air channel configured to provide a constant flow rate of air/oxygen;
• a system outlet coupled to all of the air channels, the system outlet being configured to output air/oxygen from the device;
• a first keyhole assembly comprising a first valve controlling air flow through the first air channel;
• a second keyhole assembly comprising a second valve controlling air flow through the second air channel;
• a third keyhole assembly comprising a third valve controlling air flow through the third air channel;
• and
• a fourth keyhole assembly comprising a fourth valve controlling air flow through the fourth air channel;
• a first airway device configured to be placed on a face of the adult patient;
• a second airway device configured to be placed on a face of the child patient;
• a third airway device configured to be placed on a face of the infant patient;
• a fourth airway device configured to provide the constant flow rate of air/oxygen;
• a first key assembly attached to the first airway device, wherein the first key assembly includes a first air tube configured to be coupled to the system outlet and a first key configured to engage the first valve in the first keyhole assembly when the first air tube is coupled to the system outlet;
• a second key assembly attached to the second airway device, wherein the second key assembly includes a second air tube configured to be coupled to the system outlet and a second key configured to engage the second valve in the second keyhole assembly when the second air tube is coupled to the system outlet;
• a third key assembly attached to the third airway device, wherein the third key assembly includes a third air tube configured to be coupled to the system outlet and a third key configured to engage the third valve in the third keyhole assembly when the third air tube is coupled to the system outlet;
• and
• a fourth key assembly attached to the fourth airway device, wherein the fourth key assembly includes a fourth air tube configured to be coupled to the system outlet and a fourth key configured to engage the fourth valve in the fourth keyhole assembly when the fourth air tube is coupled to the system outlet.