of research vary depending upon the amount and duration of pressure that is simultaneously
applied with varying temperatures (Patel, 1999; Kokate, 1995). However, higher ambient
temperatures have been shown to cause an increase in tissue metabolism and oxygen
consumption on the order of 10% for every one degree Celsius (Brown, 1965). Thus, the
oxygen requirements of high risk patients who already possess compromised tissue may be
increased. Any increase in temperature in combination with pressure is believed to
increase the susceptibility of the tissue to injury either from ischemia or reperfusion
when pressure is relieved . The application of repetitive surface loading alone also
induces an elevated skin temperature of 5
degrees C or greater (Vistnes, 1980).
In addition, peak skin temperatures have been found to be proportional to the magnitude
and duration of the applied pressure .