Mindray A7 - Resistance of Breathing Systems; CO 2 Absorber Resistance; CO 2 Absorber Capacity; Unidirectional Valve Opening Pressure

Data Storage (Non-Volatile) and Recording Product Specifications
9 - 24 046-004667-00 A7™ Operating Instructions
9.16.2 Resistance of Breathing Systems
The typical pressure drops due to inspiratory and expiratory gas flow in the breathing system at
reference flows of 0.5 and 1.0 L/s are:
• Manual, Inspiratory flow: flow rate = 0.5 L/s @ 0.22 kPa resistance
• Manual, Inspiratory flow: flow rate = 1.0 L/s @ 0.59 kPa resistance
• Manual, Expiratory flow: flow rate = 0.5 L/s @ 0.19 kPa resistance
• Manual, Expiratory flow: flow rate = 1.0 L/s @ 0.44 kPa resistance
• Auto, Inspiratory flow: flow rate = 0.5 L/s @ 0.23 kPa resistance
• Auto, Inspiratory flow: flow rate = 1.0 L/s @ 0.59 kPa resistance
• Auto, Expiratory flow: flow rate = 0.5 L/s @ 0.50 kPa resistance
• Auto, Expiratory flow: flow rate = 1.0 L/s @ 0.23 kPa resistance
9.16.3 CO
2
Absorber Resistance
For a CO
2
absorber filled with pre-pack absorbent: resistance at 1 L/s flow = 0.13 kPa
For a CO
2
absorber filled with loosened absorbent: resistance at 1 L/s flow = 0.12 kPa
9.16.4 CO
2
Absorber Capacity
CO
2
absorber capacity is 1 Pre-Pak or 1500 ml.
9.16.5 Unidirectional Valve Opening Pressure
Dry: 0.02 kPa opening pressure
Wet: 0.02 kPa opening pressure.
9.17 Data Storage (Non-Volatile) and Recording
Leakage
(Manual mode, Bypass On)
21.22 ml/min @ 3 kPa
Leakage
(Mechanical Ventilation mode,
Bypass Off)
51.45 ml/min @ 3 kPa
Leakage
(Mechanical Ventilation mode,
Bypass On)
19.22 ml/min @ 3 kPa
TABLE 9-36
Leakage of Breathing System
Configuration Storage: A7 supports one factory configuration group and one user
configuration group. Each configuration has three patient size
types: Adult, Pediatric, and Infant.
Log Storage: 500 entries of alarm log
500 entries of activity log
500 entries of error log
500 entries of service log
TABLE 9-37
Data Storage (Non-Volatile) and Recording