Materials:
Principle:
The ONE TOUCH ULTRA system is an in vitro diagnostic test system used for the quantitative measurement of glucose in whole blood. An electrochemical process called chronoamperometry determines the concentration of glucose in a patient’s blood. Chemicals in the test strip using glucose oxidase chemistry mix with the blood sample and a small electrical current is produced. The strength of this current changes with the concentration of glucose in the sample.
Reagents:
QUALITY CONTROL:
Whole blood (Biorad Meter Trax) Low and High control should be run each day of testing or as needed after cleaning or inconsistent results. Run controls in patient mode.
Control values must be within range or results cannot be reported. Enter control values in Harvest LIS.
Testing personnel:
Due to State of California Licensure testing may be performed by licensed personnel only. MDs, PA's, FNPs, LVNs, RNs, and CLSs may perform fingerstick glucose testing.
PATIENT TESTING:
NOTE:
Expected results
This meter is plasma calibrated. Results should agree within 20% of a venous blood sample tested on a chemistry analyzer in the laboratory. Plasma calibrated capillary glucose values obtained by the OneTouch Ultra2 Meter will be about 12% higher than whole blood calibrated meters.
Recent meals; hematocrit >55% or <30%; severe dehydration; and ambient room temp near 18C may cause capillary glucose values to be >20% different than venous lab tested values.
Fasting: 70-105 mg/dL
Random: 70-110 mg/dL
1 hour post prandial: <160 mg/dL
2 hours post prandial: <120 mg/dL
Linearity : 20-600mg/dl
Cleaning and maintenance of glucometer
To clean the meter, wipe the surface with a soft cloth dampened with water and mild detergent. Do not use alcohol or other solvents to clean the meter. Do not get liquids, dirt, dust, blood, or control solution inside the meter through the test port or the data port.
Batteries
The One Touch Ultra meter uses two 3.0 Volt CR 2032 lithium batteries. One powers the backlight and one powers the meter only. Batteries can be obtained on the top shelf of the laboratory refrigerator.
The meter displays a battery icon in the upper right corner of the display for a low battery message to indicate the condition of the meter battery only. When the battery icon appears, there is enough power for a minimum of 100 more tests. When the LOW BATTERY screen message appears, there is not enough battery power remaining to perform a test and a new battery must be installed. See glucometer booklet for battery replacement instructions.
Limitations