GE Aestiva 5 Service Manual
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7 Theory of Operation and Specifications 1006-0939-0007-77-7 Breathing system schematic AB.23.106
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Aestiva 7-81006-0939-000 7-8 Electrical block diagram O2 Sensor Flow Sensors Bag/Vent Switch Canister Release Breathing Circuit Module Absorber Control Panel CO 2 Bypass RS232C System switch O2 supply fail and flush switches AB.90.089 Tec 6 Outlet 100-120 Vac 220-240 Vac 50/60 Hz Task Light Connector Board Connector Board Front PanelPneumatic EngineSensor Interface Board MicroController Board BatteryTwo Stage FilterToroid AC Inlet Module - Fuses - Voltage Selector Assembly
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7 Theory of Operation and Specifications 1006-0939-0007-97-9 Pneumatic circuits Gas supplies (items 1-6)Refer to Figure 7-8 for location of items. Gas goes into the system through a pipeline or cylinder connection. All connections have indexed fittings, filters, and check (one way) valves. Gauges show the cylinder and pipeline pressures. A regulator decreases the cylinder pressures to the appropriate system pressure. A pressure relief valve helps protect the system from high pressures. To help...
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Aestiva 7-101006-0939-000 7-10 Mixed gas (item 26)The mixed gas goes from the flowmeter outlet through the vaporizer that is ON, to the fresh gas outlet, and into the breathing system. A pressure relief valve sets the maximum outlet pressure. Key to Numbered Components1. Pipeline pressure gauge 2. Pipeline connection 3. Cylinder pressure gauge 4. Cylinder connection 5. Cylinder pressure regulator 6. Pressure relief (opens at approx. 918 kPa) 7. Supply connections for the ventilator 8. System switch 9....
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7 Theory of Operation and Specifications 1006-0939-0007-117-11 Figure 7-7 • Pneumatic circuit AA.96.131
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Aestiva 7-121006-0939-000 7-12 Suction regulators (optional) Venturi Suction RegulatorSupply: Air or O2 from system gas supply Drive gas consumption: 75 L/min Maximum Vacuum: 457 mm Hg with pipeline drive gas at 345 kPa Minimum flow: 20 L/min Sound level 53 dBA Accuracy: 5% of full scale Continuous Suction RegulatorSupply: External vacuum Vacuum levels: 0-200 mm Hg and full line vacuum Maximum flow: >20 L/min Accuracy: 5% of full scale O2 flowmeter (optional) Supply: O2 from system gas supply flow rates:...
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7 Theory of Operation and Specifications 1006-0939-0007-137-13 Breathing system There are two types of breathing circuit modules (Figure 7-8): 1. Circle 2. Mapleson D or Bain (With Mapleson D/Bain circuits one flow sensor measures Inspiratory and expiratory flows. The other measures fresh gas.) Tabs on the circuit modules fit into infrared switches on the breathing system bulkhead. The ventilator uses these switches to identify the circuit module. Direct fresh gas connections (common and auxiliary...
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Aestiva 7-141006-0939-000 7-14 1. O 2 sensor (ventilator) Or plug 2. Inspiratory port 3. Tabs (identify the breathing circuit module to ventilator) 4. Expiratory port 5. To-Fro port 6. Fresh gas port 7. Flow sensor module connector (used with ventilator) 8. Optical switches (use tabs to identify circuit module) 9. Internal connection (exhaled gas flows to absorber during expiration) 10. Internal connection (to Bag/Vent switch) 11. Auxiliary Common Gas Outlet (some models) 12. Selector switch (Auxiliary...
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7 Theory of Operation and Specifications 1006-0939-0007-157-15 Breathing system specifications Volume 5500 mL Absorbent 1.35 kg (400 mL) / canister Connections Breathing circuit modules: Circle or Bain modules Common gas outlet: ISO 5356 type connector (Standard 22 mm OD or 15 mm ID conical friction fit connectors). Remove the breathing circuit module to access. Auxiliary outlet: ISO 5356 type connector on the front of the breathing system (Standard 22 mm OD or 15 mm ID conical friction fit...
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Aestiva 7-161006-0939-000 7-16 Pressure required to open inspiratory and expiratory valves Dry: 0.49 cmH 2O Moist: 0.91 cmH 2O Breathing system leakage (average during use) APL Valve Approximately 0 to 70 cmH 2O Pressure Flow Data (APL Valve Completely Open) System volume: 5500 mL Gas scavengingPassive scavenging: Positive pressure relief: 10 cmH 2O Negative pressure relief: 0.5 cmH 2O Outlet connector: 30 mm male taper swivel Active scavenging: Particle filter at the outlet has a pore size of...