Bayer HealthCare RapidPoint 400 Series Service Manual page 42

Two seal septums serve as the coupling between the hydraulics of the
wash/waste and the measurement cartridges. When the wash/waste
cartridge is installed, it connects to two wash/waste cartridge fittings that
are located on the outside edge of the measurement cartridge cover.
These fittings provide the interface between the measurement cartridge
and the wash/waste cartridge. The top fitting is the path into the waste bag.
The bottom fitting is the path out of the wash bag. In addition to the wash/
waste fittings on the measurement cartridge, there is a primary and a
secondary alignment pin. These pins align the wash/waste cartridge
fittings with the septums.
When the wash/waste cartridge is placed in the system, the fittings on the
measurement cartridge are inserted into the wash/waste cartridge, and the
pierce probes penetrate the wash and waste bags. In the case of the wash
bag, the pierce probe penetrates the bag and creates a seal inside the
fitting. However, the waste bag is already open and the pierce probe seals
inside the fitting in the bag. Two bag clamps, one at the top of each bag,
hold the bags in position. Two hangers, one at the top of the cartridge and
one at the bottom of the cartridge, hold the waste bag in place as it fills.
Only the replaceable cartridges of the Rapidpoint 400 series systems
come in contact with biohazardous waste fluid. Biohazardous waste fluid
never contacts other components of the system. The waste fluid is
completely enclosed in the waste bag, which accommodates 500 mL of
waste. The waste collection system has sufficient reserve capacity to
prevent overfilling, provided the cartridges are replaced when the operator
is prompted to do so by the system.
The wash/waste cartridge contains 250 mL of wash reagent. The wash
reagent washes the valve and the sample flow path. It consists of gases
(oxygen, carbon dioxide, nitrogen), salts (alkali halides), a surfactant, and
a preservative.
Each wash/waste cartridge is stable for 10 days after installation on the
system and contains enough reagent for 300 patient and QC sample
analyses. The system prompts the user when the cartridge needs to be
replaced.
The wash/waste cartridges may be stored refrigerated or at room
temperature (2 to 25°C).
42 Rev. C