title: Measuring alignment of the hindfoot.
abstract: In subtalar arthrodesis operations, correction of the hindfoot alignment is performed in about half of the cases. To improve the quality of the operation, a measurement system was developed which reliably measures the hindfoot angle pre-, per-, and postoperatively. This device was evaluated by measuring subjects in standing weightbearing position and in prone nonweightbearing position. The results were compared with hindfoot angles constructed on posterior photographic images. The results are similar to other studies (all maximum values): intratester accuracy 1.4 degrees, intertester accuracy 2.2 degrees, intratester reliability 0.9, and intertester reliability 0.74. The proposed device will improve the quality of correction, because it enables peroperative measurement of hindfoot alignment.
authors.affiliation: Man-Machine Systems and Control, Department of Design, Engineering, and Production, Delft University of Technology, Mekelweg 2, Delft, 2628 CD, The Netherlands. g.j.tuijthof@amc.uva.nl
authors.forename: Gabrielle J M
authors.initials: GJ
authors.lastname: Tuijthof
authors.forename: Just L
authors.initials: JL
authors.lastname: Herder
authors.forename: Peter E
authors.initials: PE
authors.lastname: Scholten
authors.forename: C Niek
authors.initials: CN
authors.lastname: van Dijk
authors.forename: Peter V
authors.initials: PV
authors.lastname: Pistecky
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D005528:Foot / Q000033:anatomy & histology* / Q000502:physiology* / Q000601:surgery; D006801:Humans; D008297:Male; D019990:Perioperative Care / Q000295:instrumentation / Q000379:methods; D010808:Physical Examination / Q000295:instrumentation* / Q000379:methods; D011182:Postoperative Care / Q000295:instrumentation / Q000379:methods; D011187:Posture / Q000502:physiology; D011300:Preoperative Care / Q000295:instrumentation / Q000379:methods; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013380:Subtalar Joint / Q000033:anatomy & histology* / Q000502:physiology* / Q000601:surgery; D016474:Weight-Bearing / Q000502:physiology*