Detecting Periodic Limb Movements with Off-the-shelf
Accelerometers Andr Dias a,b,e, Lukas Gorzelniak b,c, Juliane
Rudnik d, Dragan Stojanovic d, Alexander Horsch a,b,e,f a Norwegian
Centre for Integrated Care and Telemedicine, University Hospital of
North Norway, Troms, Norway b Institut fr Medizinische Statistik
und Epidemiologie, Technische Universitt Mnchen, Germany c
Institute for Epidemiology II, HelmholtzZentrum mnchen, German
Research Center for Environmental Health d Clinic Bad Reichenhall,
Center for Rehabilitation, Pneumology and Orthopedics, Germany e
Computer Science Department, University of Troms, Norway f
Department of Clinical Medicine, University of Troms, Norway Slide
2 Periodic Limb movements Afects sleep quality Related to sleep
apnea, COPD, hypertension Slide 3 Gold Standard polysomnography
(PSG): lab, expensive, sleep over Slide 4 Can we use
accelerometers? Cheap, easy to use Follow up of patients after
therapy Self assessment Slide 5 Subjects and materials Two patients
at Clinic Bad Reichenhall PSG: Philips Respironics Alice 5
Accelerometer: Actigraph GT3X 30Hz, 3-axis, pre-filtered Both legs
at ankle Slide 6 Software code.google. com/p/movy zer/ Similarity
function (1) GT3X Graph (left leg), (2) GT3X Graph (right leg), (3)
PSG Graph, (4) Log field, (5) Parameters Slide 7 Results Slide 8
Discussion 8% similarity: far from relevant for medical
applications Other authors have reported underestimation of
accelerometers But we are in contrast higher sampling: 100hz Slide
9 Unpublished results
