Mindray A5 Operating Instructions

Input Fresh Gas Operations
5 - 6 046-003777-00 A5/A3™ Operating Instructions
5.5 Input Fresh Gas
5.5.1 Set N
2
O, Air, and O
2
Inputs
1. You can control the N
2
O, Air, and O
2
flows in the fresh gas through the N
2
O, Air, and O
2
flow
controls. Readings of the gas flow can be seen on the respective electronic flowmeter on the
screen. Below the electronic flowmeters and between the pressure gauges is the total
flowmeter showing the total flow of the mixed gas.
• Safety systems within the A5/A3 work to prevent hypoxic mixtures from being delivered
to the patient. Nitrous oxide will not be delivered unless oxygen flow is present. A
mechanical safety system assures that at least 21% O
2
is present when setting mixtures
of O
2
and N
2
O.
• Ensure that both O
2
and N
2
O flow controllers are turned OFF fully (clockwise) at the start
and at the end of each case.
• All A5/A3 units are designed to maintain a safe O
2
:N
2
O ratio by allowing nitrous oxide to
be set to a flow rate that is proportional to a previously adjusted flow of oxygen. The
N
2
O flow is limited by the flow of O
2
so that a safe ratio of no less than 21% oxygen can
be maintained.
• When adjusting N
2
O and O
2
flow rates, always adjust the oxygen flow first to enable the
nitrous oxide flow. To add N
2
O to the fresh gas flow, the user must open the N
2
O
flowmeter valve, but only after opening the O
2
flowmeter valve.
NOTE: You can adjust O
2
concentration in the breathing system through the
O
2
flow control.
NOTE: The total flowmeter is calibrated based on 100% O
2
. The accuracy of the
flowmeter may degrade with other gas or mixed gas.
NOTE: When viewing the readings on the total flowmeter, keep your visual
angle at the same level of the float. The reading of the scale may vary
when viewed at a different angle.
NOTE: If the readings shown on the electronic flowmeters differ from that on
the total flowmeter, the electronic flowmeter will prevail and the total
flowmeter is an approximate value.
NOTE: When the AC power supply is not connected and batteries are depleted,
the flow and the composition of the fresh gas are not affected. When
the individual N
2
O or Air supply fails, the corresponding fresh gas
cannot be achieved. When O
2
supply fails, both O
2
and N
2
O fresh gas
cannot be achieved.

Mindray A5 Specifications

General

Type	Anesthesia Machine
Brand	Mindray
Model	A5
Power Supply	100-240 V AC, 50/60 Hz
Ventilation Modes	SIMV, PSV
Flowmeters	O2, N2O, Air
Vaporizer Capacity	Up to 3 vaporizers
Safety Features	O2 failure protection, low pressure alarm
Gas Module	Optional integrated gas module
Integrated Air Compressor	Optional
Patient Monitoring	Integrated monitoring with optional modules