Clinical application of a handy intraoperative measurement device for lumbar segmental instability

Yuichi Kasai; Tadashi Inaba; Takaya Kato; Koji Akeda; Atsumasa Uchida
January 2010
International Orthopaedics;Jan2010, Vol. 34 Issue 1, p97
Academic Journal
Abstract  We describe the development of a new device that permits handy intraoperative measurement of lumbar segmental instability. The subjects comprised 80 patients with lumbar degenerative disease. Relationships between preoperative radiological assessments and extended distance as measured using our new device were investigated. Mean extended distance measured using the device was 3.7 ± 1.9 mm. Correlation coefficients between angular motion and extended distance, and translational motion and extended distance were 0.76 and 0.66, respectively, revealing significant positive relationships between these values (p p 


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