A7™ Operating Instructions 046-004667-00 1 - 5
Product Description General System Overview
1.1.6 Anesthesia Ventilator
The A7 ventilator offers multiple ventilation modes: Volume Control Ventilation (VCV), Synchronized
Intermittent Mandatory Ventilation-Volume Control (SIMV-VC), Pressure Control Ventilation (PCV),
Pressure Support (PS) ventilation, Pressure Control Ventilation (PCV) with and without Volume
Guarantee (VG), Synchronized Intermittent Mandatory Ventilation-Pressure Control (SIMV-PC), and
Manual ventilation.
1.1.7 Breathing System
A portion of the patient circuit is integrated into an assembly block called the breathing system. The
system contains a temperature controller, which warms the block to a temperature of 35ºC typical at
20ºC ambient temperature to limit the formation of water condensate. The breathing system can be
swiveled horizontally up to 50 degrees for user convenience.
The breathing system provides access to the APL valve and breathing bag along with a view of the
airway pressure gauge. The APL valve has a single turn knob with quick release that provides a clear
view of the manual breathing pressure setting. The absorber assembly incorporates a cam-lock
device that opens and closes to provide access to the absorber canister. Either a Pre-Pak or loose fill
CO
2
absorbent can be used. Two water traps that can be drained are located on the CO
2
absorber
assembly and on the breathing system block.
NOTE: Operating the A7 with a full water trap in the breathing system block
does not allow the water to condense appropriately. The trap should be
removed and emptied when filled with water.
Two (2) flow sensors in the breathing system measure inspired and expired gases for control and
monitoring. Breathing pressure is monitored with both a PAW gauge (mechanical) and electronic
gauge. The breathing system can be swiveled for ease of positioning. A leak test port is provided to
allow for leak testing during startup.
The main pneumatic components of the breathing system are as follows:
• Inspiratory Valve (passive)
• Expiratory Valve (passive)
• Airway Pressure Limiting Valve (APL)
•CO
2
Absorber Assembly
• Bellows Assembly
• Auto/Manual ventilation switch
• Bag arm
•PAW Gauge
The breathing system connects to the A7 main unit through the following ports:
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