To prove the effect of the TEPSO® fabric containingLenzing PROFILEN® PTFE fibres the following clinicaltests were conducted: pilot study, palmoplantarpsoriasis study and pustular palmoplantar psoriasisstudy. In all three studies patients were randomlyequipped with garments (socks) either out of theTEPSO® product line or similar products out of 100%cotton. With a quality of life judgement by the patientsbased on visual analogue scale (VAS) and a globalassessment by a physician both products were evaluatedafter a period of 4 weeks of testing. In all three clinicalstudies with a total of 52 patients there was a clear statisticalsignificance for the improvement of patient’sglobal satisfaction as well as positive assessment bythe physician.[7]Furthermore a study of the thermo physiological comforton TEPSO® fabrics by means of a skin modelapparatus [8] was conducted as shown in Table 1.These results show clearly that the fabrics containingmore PTFE fiber have a higher thermal conductivity,visible in the thermal resistance (R(ct) ) values of Skinprotector and Skin active sample, composed by, respectively,100% and 95% PTFE fiber. They have anegligible thermal resistance, which is a very importantpoint as it allows the fabric to very quickly absorb anddissipate the body heat. The thermal resistance slightlyincreases in that samples cotton is present in the blend(Skin bed and Skin comfort). The same tendency can beseen in the values of Evaporative resistance (R(et) ).The samples tested are all very breathable, as all showa R(et) <6 m²Pa/W, so based on categorization of theHohenstein institute they are considered “extremelybreathable” fabrics. Again Skin protector and Skin activewith their high content of PTFE fibers have thelowest Evaporative resistance, probably a result of thehydrophobic PTFE fibers. The excellent hydrophobiaallows a better water vapour crossing through the fabricwhereas the samples containing cotton show a slightincrease of resistance caused by the high absorptioncapacity of cotton.As conclusion it can be said, that the analysis of thedifferent fabrics highlighted two very important featuresfor garments for Psoriasis patients:1) The fabrics offer a high thermal conductivitythat permits to gather and dissipate veryquickly the body heat, which fosters the bodytemperature regulation.2) The excellent breathability facilitates the bodysweat removal, maintaining the body alwaysdry and in comfort conditions
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