Welch Allyn 88372 Cryosurgery System - User Manual - Manual (Page 8)

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4. Select the proper tip for the cryo procedure and unscrew the protective
shield (C) from the end of the cryogun. Hand tighten the cryo tip (D)
onto the gun.
NOTE: Verify the O-ring is in place at the end of the cryogun prior to
installing a cryotip. Inspect O-ring and replace if cracked or damaged.
5. Open the gas supply valve on cylinder.
NOTE: this manual is not meant to teach the proper technique or any
of the medical considerations regarding the use of this equipment.
Welch Allyn recommends that prospective users obtain appropriate
(C) (D)
6. Turn the arrow valve
to ON position.
Verify pressure is in
the working range.