Part 6: Detection and Prevention of Foot Problems in Type 2 Diabetes

Part 6: Detection and Prevention of Foot Problems in Type 2 Diabetes Part 6: Detection and Prevention of Foot Problems in Type 2 Diabetes

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10.07.2015 Views

side; and 82% having the same results for the dorsalis pedis on the right, while only68% on the left side. The monofilament gave the same result in the first and secondtests for 88% of people on the right, and 85% on the left side. The stability of testingwith the monofilament prompted the authors to recommend its routine use inscreening for at risk feet.There is no universal consensus on the optimal testing sites for the 10g Semmes-Weinstein monofilament with various studies recommending between 1 and 10different sites. McGill et al (1999) addressed this question in a study of 132 randomlyselected Australian people with diabetes by calculating the sensitivity and specificityof the 10g Semmes-Weinstein monofilament assessed at 5 different sites inidentifying people with a VPT >40V using the biothesiometer. Inability to detect themonofilament at either of the sites over the first and fifth metatarsal heads gave asensitivity and specificity of 80% and 86% respectively for a VPT >40V. Whileproviding a practical approach to screening large numbers of people with diabetes itshould be noted that in this study the choice of a VPT >40V was arbitrary and thatulceration was not a study endpoint (McGill et al, 1999).44

Summary - Detection of Loss of Protective Foot Sensation• A loss of sensation to the 5.07 Semmes-Weinstein monofilament which exerts a10g pressure at buckling point indicates loss of protective foot sensation• Failure to feel the 10g Semmes-Weinstein monofilament at one uncallused plantarsite is predictive of future foot ulceration• The 10g Semmes-Weinstein monofilament is equivalent to or better than othersimple tests of neuropathy for the primary care setting• The Semmes-Weinstein monofilament test is simple and its reliability is clinicallyacceptable• Data on the optimal number and location of sites for testing with 10g Semmes-Weinstein monofilament are limited and further research is required• The limited available data suggest that testing at two sites, over the first and fifthmetatarsal heads, is sufficient to identify loss of protective sensation45

side; <strong>and</strong> 82% hav<strong>in</strong>g the same results for the dorsalis pedis on the right, while only68% on the left side. The mon<strong>of</strong>ilament gave the same result <strong>in</strong> the first <strong>and</strong> secondtests for 88% <strong>of</strong> people on the right, <strong>and</strong> 85% on the left side. The stability <strong>of</strong> test<strong>in</strong>gwith the mon<strong>of</strong>ilament prompted the authors to recommend its rout<strong>in</strong>e use <strong>in</strong>screen<strong>in</strong>g for at risk feet.There is no universal consensus on the optimal test<strong>in</strong>g sites for the 10g Semmes-We<strong>in</strong>ste<strong>in</strong> mon<strong>of</strong>ilament with various studies recommend<strong>in</strong>g between 1 <strong>and</strong> 10different sites. McGill et al (1999) addressed this question <strong>in</strong> a study <strong>of</strong> 132 r<strong>and</strong>omlyselected Australian people with diabetes by calculat<strong>in</strong>g the sensitivity <strong>and</strong> specificity<strong>of</strong> the 10g Semmes-We<strong>in</strong>ste<strong>in</strong> mon<strong>of</strong>ilament assessed at 5 different sites <strong>in</strong>identify<strong>in</strong>g people with a VPT >40V us<strong>in</strong>g the biothesiometer. Inability to detect themon<strong>of</strong>ilament at either <strong>of</strong> the sites over the first <strong>and</strong> fifth metatarsal heads gave asensitivity <strong>and</strong> specificity <strong>of</strong> 80% <strong>and</strong> 86% respectively for a VPT >40V. Whileprovid<strong>in</strong>g a practical approach to screen<strong>in</strong>g large numbers <strong>of</strong> people with diabetes itshould be noted that <strong>in</strong> this study the choice <strong>of</strong> a VPT >40V was arbitrary <strong>and</strong> thatulceration was not a study endpo<strong>in</strong>t (McGill et al, 1999).44

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