III. SPECIFICATIONS, CONNECTIONS & USER INTERFACE cont’d.
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whenever possible. Because NiMH batteries will naturally “self-discharge”, it is strongly recommended the
battery be cycled through at least one charge/discharge according to the table below if left off the power
supply for an extended period of time.
Storage Temperature Range Time to Charge/Discharge
104°F to 122°F (40°C to 50°C) Less than 30 Days
86°F to 103°F (30°C to 39°C) 30 to 60 Days
32°F to 85°F (0°C to 29°C) 61 to 90 Days
WARNING: Never operate the CROSSVENT without a battery since it will fail to
operate if the plug-in power supply is removed.
CAUTION: The battery should be replaced at least every two years. Only use batteries
supplied by Bio-Med Devices, part #PRT4467. Do not substitute.
FLOW SENSOR (PNEUMOT
FLOW SENSOR (PNEUMOTFLOW SENSOR (PNEUMOT
FLOW SENSOR (PNEUMOTACH)
ACH)ACH)
ACH)
The pneumotach (use is optional) plugs in here and permits the measurement of flow, which is used to
display Exhaled Tidal (or Minute) Volume. Only the pediatric/adult pneumotach can be used with this
ventilator. If any other pneumotach is plugged in, a warning will be displayed in the Alarm 1 menu.
CAUTION: Do not apply tension to the flow sensor tubing. Do not allow the sensor to be
in the patient circuit but not connected to the ventilator when ventilating.
CAUTION: The pressure connection tubes of the pneumotach should always be mounted
vertically to prevent collection of condensate in the pressure tubes. The tubes should be
inspected periodically and condensate should be removed. This condensate may cause
erroneous readings and thus improper operation of the CROSSVENT. Never block these
connections with the unit operating as this can damage the internal transducer. Always
securely connect the pneumotach to its connector before inserting the pneumotach in the
flow stream. This will prevent possible damage to the internal transducer and will also
prevent humidified gas from inadvertently blowing up the pneumotach sensing lines.
OXYGEN SENSOR
OXYGEN SENSOR OXYGEN SENSOR
OXYGEN SENSOR CONNECTOR
CONNECTORCONNECTOR
CONNECTOR
O
2
sensor (use is optional) plugs in here. This measures the oxygen concentration of the gas mixture being
delivered to the patient and is displayed in the Alarm 2 menu.
WARNING: For proper operation, only the O
2 sensor supplied by Bio-Med Devices may be
used.
EXHALATION VALVE CON
EXHALATION VALVE CONEXHALATION VALVE CON
EXHALATION VALVE CONNECTOR
NECTORNECTOR
NECTOR
The tube to the exhalation valve on the patient circuit connects here and provides the pressure signal to
operate the exhalation valve. During inspiration it applies a pressure signal to the exhalation valve
diaphragm which sets the Maximum Pressure Limit. During expiration it provides zero or PEEP/CPAP
level pressure to the exhalation valve diaphragm.
AIRWAY PRESSURE CONN
AIRWAY PRESSURE CONNAIRWAY PRESSURE CONN
AIRWAY PRESSURE CONNECTOR
ECTORECTOR
ECTOR
The proximal airway pressure tube on the patient circuit connects here. This allows the CROSSVENT to
monitor airway pressure and also to detect patient inspiratory efforts.
PATIENT GAS CONNECTO
PATIENT GAS CONNECTOPATIENT GAS CONNECTO
PATIENT GAS CONNECTOR
RR
R
The main patient corrugated hose is attached here. It provides the un-humidified breathing gas mixture to
the patient circuit.
ALARM RESET SWITCH
ALARM RESET SWITCHALARM RESET SWITCH
ALARM RESET SWITCH
Pressing this button silences the alarm of the Power Failure circuit, which is a separate section of the main
circuit board.
This circuit monitors the power to the main circuit board. If power is lost, either as a result of turning the
main power switch off or a total power failure to the circuit board, i.e., no external power and no battery, it
sounds an audible alarm (long tone) and flashes the LED, which will continue for at least 3 minutes after
failure. Pressing the Alarm Reset Switch permanently silences the audible alarm.
WARNING: To obtain the full 3-minute duration of the Power Failure alarm when
power is lost, the Crossvent must have been powered on for at least 1 minute prior
to the failure.
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