| Summary: | 碩士 === 中原大學 === 醫學工程研究所 === 95 === The Lower Limbs Ulcer is often happened to the low limbs and paralyzed patient of four limbs resulted from the forming factor of pressure, temperature, shearing stress, moisture and nutrition etc.. Using visual and skin contacts to subjective diagnosis is the traditional estimate method; but its diagnosis is inaccuracy occasionally.
This research purpose is to utilize the thermal imaging, examines the skin and tissue the variation tendency with difference temperature while receiving some pressure, discuss with pressure, time and dependence that body surface temperature change, offer and diagnose it with the therapeutic basis, estimate the important indicator which pressure sore grade. Compare according to document data, estimate the thermal imaging system could is it diagnose for clinic low limbs ulcer.
This research investigates the influence situation of temperature to pressure sore using SPECTRUM9000MB-500 thermal imaging system and Vista Medical FSA UT1010 pressure system to gather the low limbs image of 15 normal persons at random at different pressure. The left low limbs are set up for the experiment group, with invariable contact interface pressure 40-90 mmHg, exert pressure for 20-60 minutes continuously, exert and test in the position in the middle of the left low limbs equally, the right low limbs are set up for the control group. Estimates the temperature distributions and standard deviations of six zones including upper, middle, lower of two lower limbs with the characteristic of thermal imaging.
The experimental results are shown that the blood vessel of lower limbs loading pressure cause larger temperature difference of body surface and this temperature difference is below 2.5℃ at lower 100 mmHg and short time. The temperature difference distributions and standard deviations are more and more large as lower limbs loading heavy or long resulting in some blood vessel twist or distortion. The temperature difference is over 4℃ at the continuing situation of 40mmHg and above 300 minutes. Control the low limbs to measure correct degree and analysis for 0.92 meanings of diagnosing through ROC curve. At last, the experimental and thermal image analyzing methods can be the diagnosis auxiliary tool rapidly for paralysis patient and low limbs ulcer in this paper.
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