H&O Equipments CryoPen Series User Manual page 8

I
Position the CryoPen/CryoProbe for
treatment.
The instrument must be held vertically
with the tip directed downward. An angle
of less than 45° must be avoided.
I
Effective application.
Before starting treatment
account age, location, size and number of
lesions, skin type, degree of tanning and
season.
The applicator tip (from where the
liquefied N O flows) should be held 0,5 to
2
4 mm from the lesion. Further than 5 mm
from the applicator tip the liquefied N
will have expanded into gas phase which
is not effective for achieving therapeutic
results.
By approaching the lesion with the
gas flowing you will observe the focal
point of the jet on the tissue. The closer
you approach the lesion,
freezing power you apply to the tissue.
It is recommended to keep a greater
distance for the smaller and more delicate
procedures.
The amount of liquid N O that you wish
2
to apply can be controlled by moving the
8
take into
OK!
Position the CryoPen/
O
2
CryoProbe correctly
the more
Distance to lesion
applicator quickly towards and away from the tissue. Circular and
crossing movements have the same effect.
Do not hold the CryoPen/CryoProbe applicator still above the lesion.
It may flood the area and damage healthy tissue surrounding the
lesion. This can cause blisters and pain to patients.
Condensation of humidity in the air on the frozen field of the lesion
during operation may in some cases create an ice field on top of the
lesion. This 'iglo of ice (at ca 0°C)' will hinder the effective working
of the liquid phase of the cryogen (at -89°C/-128 °F) and should be
removed with the applicator tip.
OK!
After thawing, the tissue turns reddish and has the aspect of a zone
of inflammation due to interstitial bleeding.
The learning curve for utilizing the CryoPen/CryoProbe is short.
CryoPen/CryoProbe provides the possibility to have full control in
the application of freezing power. Start practicing on the regular
lesions and treat the more delicate ones after having acquired some
experience.
I
Duration/Depth of the treatment.
Hold the tip of the applicator as close as possible to the lesion.
In all literature, the rapid drop of temperature (thermal shock) is
described as a critical criterion. However, always relate to the part
of the body where the operation is applied. In some parts, skin is
thinner which requires more caution. The penetration rate of freezing
with the CryoPen/CryoProbe is approximately 1 mm per 5 seconds
with a maximum freezing depth of 3 to 6 mm depending on the used
applicator. The duration of the treatment time will depend on the
surface area and the thickness of the tissue being treated. Thickness
must be estimated based on clinical experience. After the first
OK!