Original Article: PDF OnlyMeasurement of Spinal Sagittal Configuration and Mobility with Debrunner's KyphometerÖHLÉN, GUNNAR MD*; SPANGFORT, ERIK MD*; TINGVALL, CLAES DrMedSc†Author Information *From the Department of Orthopaedic Surgery, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden †From the Research and Development Division of the Folksam Insurance Group, Stockholm, Sweden Spine: June 1989 - Volume 14 - Issue 6 - p 580-583 Buy Abstract A considerable number of instruments have been described for noninvasive measurements of the sagittal configuration and mobility of the thoracolumbar spine. With Debrunner's kyphometer, it is possible to obtain this information in approximately 1 minute in a clinical setting. A minor modification of the kyphometer to increase its range of measurement of lumbar extension is described. Repeatability of measurements with the instrument was studied on 31 healthy individuals in a randomized cross-over model. In another study, ten individuals were examined ten times each by the same investigator within 3 weeks. These studies showed good reproducibility for measurements with the kyphometer. The importance of standardized instructions for measurement procedures is emphasized. The statistical approach to repeatability of measurements is discussed. © Lippincott-Raven Publishers.