Omron 10 SERIES PLUS BP791IT Instruction Manual page 28

APPLYING THE ARM CUFF
6. Apply the cuff to your left upper arm so the blue stripe is on the
inside of your arm and aligned with your middle finger. The air tube
runs down the inside of your arm. The bottom of the cuff should be
approximately 1/2" above your elbow.
Blue Stripe
7. Wrap the cuff firmly in place around your arm using the cloth
fastener.
1/2 inch (1 - 2 cm)
28
Air Tube