Version date: 04 April 2016
To obtain a good transmission of pressure from the air bladder to the underlying
tissues both sides of the air bladder should just make contact (Figure A3-2).
Figure A3-2: cuff application and cuff size guide
A3.1.2 Notes on cuff handling
Take into account the following notes to prevent finger cuff damage:
Don't remove the finger cuff from a finger before stopping the measurement
or before disconnecting the air hose from the Frontend Unit. You may damage
the finger cuff even though Finapres Nova automatically takes pressure away
when the finger cuff unwraps.
Don't apply air pressure to a finger cuff, when it isn't wrapped around a finger
or any other solid object! This may damage the finger cuff.
Don't bend finger cuffs outwards to a flat shape since this may damage the
bonding and the electrical shielding. Finger cuffs are preformed around a
conical mandrel during manufacturing.
Do not try to repair defective finger cuffs with e.g. adhesive tape, this will
substantially affect measurement accuracy.
A3.1.3 Cuff application
To wrap the finger cuff around the finger:
1. Bend the finger cuff open just enough to
see the LED and photocell.
2. Place the finger in the cuff such that the
LED and photocell are symmetrically
placed on each side of the finger's soft
parts in the center of the middle phalanx.
The cuff cable and air hose are now at
the back of the hand and should point
towards the Frontend Unit.
3. Make sure the finger cuff is placed in the middle between the two knuckles,
touching each knuckle.
4. Wrap the finger cuff tightly for best performance. The finger cuffs are
designed in such a way that correct wrapping is almost natural.
5. Check that it is not easy to rotate the finger cuff after application. A common
mistake is to wrap the finger cuff not tight enough.
6. Guide the cuff cable and air hose between the fingers to the back of the hand
and connect them to the Frontend Unit which is worn on the wrist (see Figure
A3-3).
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