After aseptic preparation and local anesthetic infiltration of the
skin, insert an intravenous catheter over a needle through the skin and
direct it closely toward the area to be frozen. Remove the needle and
insert the cryoprobe (Fig. 62-1)
through the catheter. Use the nerve stimulator in the cryoprobe to
place the tip in the exact location. The typical duration of the
cryolesion is 1.0 to 1.5 minutes. The best results are obtained with
the technique of “freeze-thaw-refreeze” cycle. Once the 1.5-minute
freezing cycle at -60°C to -80°C has been performed, allow the probe to
thaw for 20 to 30 seconds and again refreeze for another 1.5 minutes. A
minimum lesion length of 4 mm is critical in order to stop nerve
Precise localization of the probe is necessary.
Avoid cryoneurolysis of the motor nerves.
Test the cryosurgical equipment thoroughly before using to ensure that there is no leak.
Figure 62-1. Cryoprobe.