H&O Equipments CryoPen B+ User Manual page 11

Step 1 I Empty the loading cavity
Before loading a new cartridge, release any unused gas from the used
cartridge by unscrewing the applicator tip followed by pressing
the button. Discard the used cartridge. Please ensure that the used
filter does not remain inside the cavity.
Empty loading cavity
Important note:
In the case that you would not follow the gas release procedure
as described before, the discharge of the gas will pass through
the small opening under the on/off button. Extreme attention should
be paid to avoid directing the jet of escaping gas to the user's hands,
face or any other unprotected body parts. Never cover this opening!
Never put your hand on this opening while removing the cartridge!
Blistered cartridge and
This action must be done in a well ventilated room and by preference
assembled filter/opener device
at an open window.
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