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of the arrow back to zero (0 IU). The display now sows “Pr” in the left-hand
section. Set the required number of venting units by turning the button in the
direction of the arrow. Hold the ESYSTA
®
BT Pen with the needle pointing
upwards so that the air can collect at the needle. Now press the dosing
button in fully until it locks into place. Once the dosing button has been
pushed in, the display will go out. Insulin will now emerge from the needle.
If this does not happen, you must repeat this procedure until insulin emerges
from the tip of the needle. All units are marked and saved as venting units.
Unlocking the dosing button again prepares the ESYSTA
®
BT Pen for a
subcutaneous dosage of insulin, as described below.
6.9 Setting the units for subcutaneous injections
Once the ESYSTA
®
BT Pen is sufficiently vented and you have switched it on
by unlocking the dosing button (see Chapter 5), you can now set the insulin
units. You can set the required dose of insulin by turning the dosing button
clockwise in steps of one unit (1 IU). A maximum of 60 IUs is possible as a
single dose. On each increase of the dose by one unit, you will hear a "click"
and at the same time feel a ratcheting action and see the dose indicated on the
display increase by exactly one unit.