IceCure
™
Medical Ltd.
DSR3200000 rev. G
ProSense
™
Confidential
User Manual
72
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5.2.6.4
Cryoprobe positioning
The cryoprobe specification defines the distance from the tip to the center of the cooling
zone.
•
Place the center of the cooling zone in the center of the target tissue to achieve accurate
killing zone.
•
Use the below formula to calculate the position of the cryoprobe inside the target tissue.
Verification of proper positioning should be made via imaging tools in real time (i.e.
measuring the distance from the cryoprobe tip till the target tissue outline (including the
tumor and the safety margins to be treated).
Example 1:
Cryoprobe 3.4 elliptic shape (FAP7200000)
Cool zone center of cryoprobe 3.4 elliptic = 20 mm
Lesion size: 15 mm in its largest dimension
Lesion shape: oval/elliptic
20
–
(15/2) = 12.5 mm
Correct placement of the cryoprobe inside the lesion requires that the tip goes
beyond the lesion by 12.5 mm.
Example 2:
Cryoprobe 2.4 elliptic shape (FAP7800000)
Cool zone center of cryoprobe 2.4 elliptic = 14.5 mm
Lesion size: 20 mm in its largest dimension
Lesion shape: oval/elliptic
14.5
–
(20/2) = 4.5 mm
Correct placement of the cryoprobe inside the lesion requires that the tip goes
beyond the lesion by 4.5 mm.
•
Pre-plan your trajectory needle insertion and the needle point of entry prior to
the treatment on baseline tumor measurements.
