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Measurement of venous leg ulcers with a laser-based three-dimensional method : comparison to computer planimetry with photography
Kecelj, Nada, 1967- ...
A lack of reproducible and practical methods to assess venous leg ulcer healing is a major problem encountered by investigators evaluating various treatments. We aimed to compare a new laser-based ...three-dimensional (3D) measuring device with computer planimetry with photography for the assessment of venous lei ulcers. and to estimate the reliability of measurements by the methods. Sixty measurements of perimeter and area of 15 venous lei ulcers. < 10cm in diameter (eight patients; six females; mean age 71 years; range 52-90 years), were made with both methods. Two independent investigators performed the measurements at the fist visit and 2-4 weeks later. The precision and accuracy of the methods were determined and compared. "The accuracies for computer planimetry with photography in comparison with the laser-based 3D measuring method were 8,4% for perimeter and 16.0`% for area measurements. Theprecisions of ulcer area and perimeter measurements did not differ significantly between the two methods (P=0.993 and 0.201, respectively). 'The main advantage of the laserbased measuring method is the 3D ulcer measurement with a precision of 7.5%, which also takes into account distortions created bythe limb convexity. The system is accurate, inexpensive, user-friendly, and appropriate for every day practice.
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