Abstract: The apparatus is connected by tubing to a patient. The apparatus has a manometer on one side in communication with an entrance port conveying ambient air to the patient. A spring loaded cap is depressed to block air inspired by the patient and cause such air to move a diaphragm in the manometer so that the inspired negative air pressure of the patient can be recorded. As soon as the cap is released a spring opens the entrance port to continue normal flow of ambient air to the patient.

Abstract: A top and bottom housing joined together have a patient port and ventilation port in axial alignment. The top housing contains dry indicator paper for changing color in response to the presence of CO2. In addition, a shaft having a pointer on a top portion rotates in response to air in the housing to indicate pressure. A helical outer wall of the shaft engages a notch in a hollow stem attached to a membrane in the lower housing so the shaft rotates in response to air pressure on the membrane.

Abstract: The CO2 detector has a disc attached to a rim which in turn is attached to a third port on a esophageal detector housing. A baffle rises from an interior surface of the housing to slightly below an opening to the third port. A first and second port of the housing on each side of the third port are in axial alignment. The first port is attached to an elastomeric bulb and the second port is adapted to be connected to an adapter which in turn is attached to an intubation tube. A colorimetric indicator paper is shown through a clear plastic cover after removing backing on the indicator paper through the second port.

Abstract: The CO2 detector has a disc attached to a rim which in turn is attached to a third port on a esophageal detector housing. A baffle rises from an interior surface of the housing to slightly below an opening to the third port. A first and second port of the housing on each side of the third port are in axial alignment. The first port is attached to an elastomeric bulb and the second port is adapted to be connected to an adapter which in turn is attached to an intubation tube. A calorimetric indicator paper is shown through a clear plastic cover after removing backing on the indicator paper through the second port.

Abstract: The CO2 detector has a bottom housing attached to a top housing. The bottom housing contains a rotatable port engageable to an intubation tube and multiple parallel integral filter support ridges on a top surface of a floor. A filter pad overlies the integral filter support ridges and a baffle overlies the filter pad. The baffle has multiple parallel filter support ridges on a bottom surface cooperating with the filter support ridges integral with the bottom housing to maintain the filter pad in position. The baffle has an air flow guide on a top surface and air passages. The top housing has a port connected to a CPR bag and a clear plastic disc overlying a CO2 calorimetric indicator paper. The colorimetric indicator paper is shown through a clear plastic cover after removing backing on the indicator paper through a sealable slot.

Abstract: A disposable manometer includes a chamber connectable to a source of CPR air pressure via a patient breathing valve and an elongated restricted passageway. The manometer includes a dial and a pointer rotatably disposed with respect to the dial to indicate the pressure sensed within a manometer chamber. The pointer has an actuator stem with a spiral-shaped protrusion coupled to a groove within an opening of a stem coupling attached at the center of a diaphragm forming one wall of the manometer chamber. Responsive to pressurized air entering the manometer chamber, the diaphragm reciprocates against the force of a biasing spring moving the stem coupling with respect to the actuator stem for the pointer so that the interaction between the spiral-shaped protrusion and the groove causes rotation of the pointer to indicate the pressure within the manometer chamber. The disposable manometer is intended to be used with a CPR bag or a patient breathing tube.