Mindray SV300 User Manual

6-9
6.5.3 V-A/C
V-A/C is volume-assist/control ventilation mode. In V-A/C mode, a certain tidal volume is
delivered to the patient within a certain period of gas delivery time. During the expiratory
phase, V-A/C mode supports synchronization trigger. Namely, when the ventilator detects
patient inspiratory effort, it delivers next mechanical ventilation in advance.
The following figure shows typical waveforms in V-A/C mode. Pmax stands for high alarm
limit of Paw.
Pmax-5
Pmax
PEEP
Tpause(%)×Tinsp
Paw
Flow
t
t
Tinsp
Texp
1/f
Insp. trigger
level
Insp. trigger level
In V-A/C mode, you need to set the following ventilation parameters:
1. [O
2
%]: Oxygen concentration
2. [TV]: Tidal volume
3. [Tinsp] or [I:E]: Inspiration time or ratio of inspiratory time to expiratory
time
4. [f]: Breathing frequency
5 [PEEP]: Positive end-expiratory pressure
6. [Assist]: Switching trigger ON/OFF
7. [F-Trig] or [P-Trig]: Inspiration trigger level
8. [Tpause(%)]: Percent of inspiratory pause time

Mindray SV300 Specifications

General

Waveform Display	Pressure, Flow, Volume
Battery Backup	Up to 2 hours
Ventilation Modes	VCV, PCV, SIMV
Tidal Volume Range	20 to 2000 mL
FiO2	21 to 100%
Inspiratory Time	0.2-5.0 s
Monitoring Parameters	Paw, Ppeak, Pmean, Pplat, PEEP, VTI, VTE, MV, f, FiO2, I:E
Alarms	High/Low Airway Pressure, High/Low Minute Volume, High/Low Tidal Volume, High/Low Respiratory Rate, High/Low FiO2, Apnea, Power Failure
Power Supply	AC 100-240V, 50/60Hz
Peak Flow	180 L/min
Trigger Sensitivity (Flow)	0.5-10 L/min