Icare TA01i Instruction Manual - page 5
Icare tonometer TA01i manual English
www.icaretonometer.com
5
probe to the patient’s cornea (see picture) should be 4-8 mm (1/6-1/3 inch).
If necessary, adjust the distance by turning the forehead support adjusting wheel. Press the measurement button lightly to perform the measurement,
taking care not to shake the tonometer. The tip of the probe should make contact with the central cornea. Six measurements are made consecutively.
After each successful measurement, you will hear a short beep. Once the six measurements have been performed, the IOP will be shown on the display
after the ‘P’.
If there is an erroneous measurement, the tonometer will beep twice and display an error message. Press the measurement button to clear the error
message. If several erroneous measurements appear, see error messages (page 10).
To obtain the most accurate reading, six measurements are required, but the result is also displayed after the first measurement, which can usually be
considered valid. The measurement values displayed are average values for all previous measurements (1.-5.). Single measurement values are not shown.
Should there be variation between the measurements, ‘P’ will flash on the display after the sixth measurement.
Following the performance of the entire measurement, a new measurement series can be begun by pressing the measurement button. The tonometer will
then be ready for the next measurement series (00 will show on the display, see page 8).
If the user doubts the validity of the measurement (for example, if the probe made contact with the eyelid, or missed the central cornea etc.), we
recommend that he/she make a new measurement. In addition, when encountering unusual values (for example over 22mmHg or below 8 mmHg) we
recommend the performance of a new measurement to verify the result.
*Badouin C, Gastaud P. Influence of topical anesthesia on tonometeric values of intraocular pressure. Ophthalmologica 1994;208:309-313
DISPLAY AFTER MEASUREMENTS
Before
After the second measurement
After the sixth measurement
00
2.13
P 13
After the sixth measurement, the letter P appears on the display, followed by the IOP (Intraocular pressure) reading.
If the P is blinking, it means that the standard deviation of the measurements is greater than normal.
P
_
(line down) The standard deviation of the different measurements has a slightly greater value than normally, but the effect on the result is unlikely to
be relevant.
P-(line in the middle) The standard deviation of the different measurements is clearly greater than normal, but the effect on the result is probably
irrelevant. A new measurement is recommended if the IOP is over 19 mmHg.
P
–
(line up) The standard deviation of the different measurements is great and a new measurement is recommended.
OTHER FUNCTIONS
Accessing old measurement value
From the starting position, press the right or left selector button
until ‘Old’ appears on the display. Then press the measurement
button. You can now ‘scroll’ through the old values by pressing
the selector buttons (right=older, left=more recent, from 0-9).
To exit the old values search, press the measurement button.
The display will now show the word ‘Old’. Press either selector button to access other functions (00=measurement, End=turning OFF).
Turning the tonometer OFF
Press either selector button until the display shows ‘End‘. Press
the measurement button for two seconds - the display will show
‘byE’ and the tonometer will switch off. The used probe will be
partially ejected. Use the used package to remove it from the
tonometer. Ensure that you dispose of the probe properly.
Error messages
To clear error messages, press the measurement button, after which the measurement can be repeated. The following messages may appear: