Presentation on theme: "The bird IPPB machine The Bird is pneumatically powered & controlled."— Presentation transcript:
1 The bird IPPB machine The Bird is pneumatically powered & controlled. it can be triggered  by negative pressure  by time or  manually.It is pressure limited, changing the breath as pressures riseIt is pressure or time-cycled off
2 Gas inletFrom 50 psigAmbientchamberPressurechamberSensitivitycontrolPressurecontrolNebulizerdrive lineMain flowdrive line
3 A flow rate controlB ceramic switchC restricted orifice for entrainmentD nebulizer drive line to in-line SVNE exhalation valve [mushroom valve]
4 On the right side of the screen see the PRESSURE CHAMBER, leftThis is a simplified picture of the ceramic switch and what makes it move to start or end a breath.On the left side of the screen is the AMBIENT CHAMBER [see the hole toward the outside?]On the right side of the screen see the PRESSURE CHAMBER,[see the outlet going to the patient circuit?]In A you see that the diaphragm is mid-line, the ceramic switch is closed. No air moves
5 In both the AMBIENT CHAMBER and in the PRESSURE CHAMBER, there is no extra pressure, both chambers are at zero [ 1 atmosphere]. There is no gas flow and the ceramic switch is closed.
6 This negative pressure pulls the clutch plate toward the magnet in the PRESSURE CHAMBER & when it gets close enough, the magnet pulls the clutch plate closer.The diaphragm moves toward the patient, to open the ceramic switch.Gas flows into the PRESSURE CHAMBER, into the circuit and into the patient’s lungs.
7 In C, the diaphragm stays toward the magnet As long as the pressure in the PRESSURE CHAMBER is lowerThan the magnet force in the AMBIENT CHAMBER …the breath continuesWe can control how deep a breath the patient takes by altering the positive pressure needed to overcome the magnet that will stop the breath
8 As the patient’s lung fills with gas, the pressure builds up in the lung, then in the circuit and finally in the PRESSURE CHAMBEROnce high enough, the positive pressure in the PRESSURE CHAMBER pushed the diaphragm toward the AMBIENT CHAMBER and flow stops--- the breath has stopped.
9 On exhalation: the ceramic switch is closed, gas stopsflowing and the patient exhalesinto the exhalation valveOn inspirationceramic switch isopen, gas flows tothe patient whose lungfill
10 On inspiration, the gas flows from the top into the Pressure chamber, intothe circuit.At the same time, the exhalationvalve is closed by the same pressureAs long as there is pressure buildingup in the pressure chamber, theexhalation valve is closed.Gas can move only into the lung
11 On exhalation phase: the pressure drops in the pressure chamber and the exhalation valve is open to the atmosphere so that the patient exhalesinto the atmosphereThe ceramic switch is closedand there Is no gas flow into any chamber.
12 During inspiration, 02 from the ceramic switch moves into the Air mix: entrainment devicesDuring inspiration, 02 from theceramic switch moves into theline that powers the entrainmentdevice.The flow goes throughthe restricted orifice decreasing lateralwall pressure in the ambient chamberso that it pulls air from theambient chamber into the gas flowgoing to the pressure chamber.What do you suppose happens tothe Fi02 and to the total flow downthe main flow drive line as the pressurerises inside the pressure chamber?