CoaguSense Assure PT Care Prothrombin Time User Manual page 7

Meter:
The meter has a TFT color LCD Touch screen that shows results, information,
icons and results recalled from memory. To select an option, gently click on the
display button. There are three touch buttons, Cancel or Previous Screen
Button, Home Screen Button and View Menu Button Screen for the Guided
User Interface (GUI) operation. The Power ON/OFF button is located on the right
side of the meter. The NFC (Near Field Communication) Tag scanner is a built-
in scanner that is used to scan the NFC Tag containing the strip (Control and
Test Strip) data. Strip Insertion Area guides the test strip into the meter. Micro
USB/Power Adapter port is a micro-USB port used to plug to the power adapter.
Multipurpose USB port can be used to connect the meter to a) portable printer, b)
®
computer, c) barcode scanner or other Assure PT Care approved accessories.
Ethernet Port is used to connect the Ethernet cable for a wired connection, this
port is provided with a port cover. Reset button (enclosed within the ethernet
port cover) is used to reset the meter in case of software or power-cycle issues.
The meter performs a self-check when it is first powered ON and every time a test
strip is inserted. If there are any problems detected during self-check, an error
message is displayed on the touchscreen. Refer to the "Troubleshooting" section
of this manual or contact Technical Support for assistance.
Test Strips:
A test strip is inserted and heated in the meter prior to sample application. The strip
contains a tiny wheel with spokes that pull the sample into the reaction well. The
spokes quickly and completely mix the sample with the clot initiating component
of the test strip.
The PT time is determined from when the sample is drawn into the reaction
well of the test strip and is detected by a beam of light until a clot forms and
interrupts another beam of light. The PT seconds result (a true prothrombin time) is
converted to an INR (International Normalized Ratio) using the INR normalization
data communicated by the NFC Tag and subsequently stored in the meter. INR is
a mathematical correction of the PT result that adjusts for sensitivity differences
among different PT/INR systems.
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