Table 1.
Absolute and percentage measurements of total and lethal ice are given for data sets from in vitro phantoms having in three different temperatures, according to number and diameter of cryoprobes. Note the probable thermocouple error and the resultant disproportionately small lethal ice measurements for the 2.4 mm cryoprobe data sets in the single "low" and triple "medium" data sets (*), since the total ice size by CT appears appropriate‥
| Phantom Temperature (heat load) | ||||||
|---|---|---|---|---|---|---|
| Number of Cryoprobe |
Cryoprobe Diameter (mm) |
Average Diameter (cm) | Diameter %Lethal |
Non-Lethal | Surface Area | |
| Iceball | Lethal Zone |
Margin (cm) | %Lethal | |||
| Low (6°C) | ||||||
| 1 | 1.7 | 4.4 | 2.3 | 52% | 1.1 | 27% |
| 2.4 | 4.4 | 1.3 | 30% | 1.6 | 9% | |
| 2 | 1.7 | 5.4 | 3.1 | 58% | 1.1 | 33% |
| 2.4 | 5.8 | 3.8 | 66% | 1.0 | 43% | |
| 3 | 1.7 | 6.5 | 3.9 | 61% | 1.3 | 37% |
| 2.4 | 6.9 | 4.6 | 66% | 1.2 | 44% | |
| 4 | 1.7 | 6.9 | 4.6 | 67% | 1.1 | 45% |
| 2.4 | 7.5 | 6.5 | 87% | 0.5 | 76% | |
| Medium (24°C) | ||||||
| 1 | 1.7 | 3.9 | 1.9 | 48% | 1.0 | 23% |
| 2.4 | 4.0 | 1.9 | 48% | 1.1 | 23% | |
| 2 | 1.7 | 4.5 | 2.4 | 54% | 1.0 | 24% |
| 2.4 | 5.1 | 3.2 | 62% | 1.0 | 38% | |
| 3 | 1.7 | 6.3 | 4.0 | 64% | 1.1 | 41% |
| 2.4 | 6.1 | 3.4 | 56% | 1.3 | 31% | |
| 4 | 1.7 | 6.3 | 4.4 | 69% | 1.0 | 48% |
| 2.4 | 6.8 | 5.0 | 74% | 0.9 | 55% | |
| High (39°C) | ||||||
| 1 | 1.7 | 3.1 | 1.1 | 35% | 1.0 | 12% |
| 2.4 | 3.4 | 1.2 | 36% | 1.1 | 13% | |
| 2 | 1.7 | 4.6 | 2.4 | 52% | 1.1 | 25% |
| 2.4 | 4.8 | 3.3 | 69% | 0.7 | 46% | |
| 3 | 1.7 | 5.4 | 3.6 | 66% | 0.9 | 44% |
| 2.4 | 5.7 | 4.1 | 72% | 0.8 | 51% | |
| 4 | 1.7 | 6.1 | 4.4 | 72% | 0.9 | 52% |
| 2.4 | 6.6 | 4.9 | 75% | 0.8 | 56% | |