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Overview :
Measurement of skin temperature is a noninvasive technique
which sometimes can predict successful amputation site healing. The warmer the
skin, the more likely the amputation site will heal.
Measurements:
• skin temperature in °C or °F
• difference between skin temperature and ambient
temperature
Wagner et al:
• mean temperature at skin site with successful amputation:
93.8 +/- 0.2°F
• mean temperature at skin site with revision required: 90.4
+/- 1°F
• for below
the knee amputations, 50 of 52 more than 90.4°F healed; 5 of 6 below 90.4°F
required revision
Oishi et al :
• healed
amputations: cutaneous temperature 31.9 +/- 1.5°C
• healed
amputations: (cutaneous temperature) - (ambient temperature) 7.0 +/- 1.7°C
• failed
amputations: cutaneous temperature: 30.5 +/- 2.2°C
• failed
amputations: (cutaneous temperature) - (ambient temperature): 6.5 +/- 2.5°C
• In 13 of
14 patients with skin temperature between 30.5 and 32°C, the amputation site
healed.
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Data in Oishi
et al |
Cutaneous
Temperature > 32°C or < 30.5°C |
(Temperature at
Site) - (Ambient Temperature) >= 5°C |
|
sensitivity |
68 |
83 |
|
specificity |
50 |
33 |
|
accuracy |
67 |
78 |
|
positive predictive value |
94 |
92 |
|
negative predictive value |
11 |
17 |
De Frang et al:
• if skin temperature is > 30°C, 80-90% of amputation
sites will heal
• if skin temperature is < 30°C, 50% of amputation sites
will heal
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