Biomedical Engineering Reference
In-Depth Information
70
RF-Flow
RF-No flow
60
50
40
30
0
10
20
30
40
Time (s)
65
MW-Flow
MW-No flow
60
55
50
45
40
35
30
0
10
20
30
40
Time (s)
(c)
FIGURE 6.15
(
c
) Top: Effects of flow on surface temperature: RF catheter (4 mm).
The changes in surface temperature as a function of time are plotted following deliv-
ery of 30 W of RF. Measurements were made in a static model (RF—no flow) and
during flow of 4 L/min (RF—flow). Flow caused a decrease in both peak surface tem-
perature and the rate of rise of surface temperature following power delivery. Bottom:
Effects of flow on surface temperature: microwave. There was a decrease in peak
surface temperature during flow (MW—flow) as compared to the static measurements
(MW-no flow). During flow, the peak surface temperature was lower for MW than RF
(46°C versus 57°C) [90].
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