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c. In order to prevent freezing of underlying structures such as tendons, nerves, or blood vessels, pull the
probe back slightly to raise the skin away from the underlying structures after the lubricant jelly has
adhered to the skin.
7.2 Technique
a. Select the appropriate contact probe based on the procedure and the size of the target area to be treated.
b. Attach the probe to the permanently affixed Knurled Nut on the Cry-Ac
®
, Cry-Ac-3
®
, or Cry-Baby
®
using finger tight firmness.
c. Ensure the area to be treated is as dry as possible.
d. Apply a small amount of lubricant jelly to cover the lesion.
e. Touch the end of the probe to the jelly but not the skin.
f. Depress the finger trigger to release the liquid nitrogen.
g. As the probe begins to freeze, the lubricant jelly will harden and attach to the skin (known as cryo-
adhesion).
h. “Freeze time” commences upon cryo-adhesion of the lubricant jelly. To limit the depth of the freeze,
pull the probe back slightly to raise the skin away from the underlying structures. To obtain a deeper
depth of freeze, apply a small amount of pressure to the probe after cryo-adhesion has occurred.
i. Upon completion of freezing, allow the probe to thaw before trying to separate the probe from the
lubricant jelly on the skin. If done prematurely, it may result in a skin tear. A slight gentle twisting
motion of the unit may expedite the release of the probe.
Depth of Freeze Recommended
3 cm Flat Probe 1 mm 32 – 35 seconds
2 mm 45 – 50 seconds
Sharp Mini Probe 1 mm 8 – 11 seconds
2 mm 35 – 40 seconds
Suggested freeze times, depth and temperatures may vary dependent upon the type of skin lesion as well as size
of probes and apertures as determined by the Physician. Suggestions are applicable to all Brymill Cryogenic
System Cry-Ac® devices and accessories.
The probes should not be used if the Teflon material of the probes show wear.
8. Maintenance
When the Cryosurgical Unit is warm and dry, the top center valve stem should be lubricated with a DROP of Silicone
Lubricate such as Loctite LB 8801. Remove any excess lubricant with a clean cloth. Lubrication should be carried out
every 3 to 6 months.
CAUTION:
If an excessive amount of lubricant is applied the trigger mechanism could freeze open.
9. Operation Instructions
Caution: When using the Cry-Ac
®
, Cry-Ac-3
®
, Cry-Baby
®
ensure the unit is kept as upright as possible to prevent
purging of Liquid Nitrogen from the Relief Valve.
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