Introduction Surgery for correction of sagittal imbalance has frequent adverse events and complications. The most frequent cause of failure is inadequate correction of imbalance. The aim of this study is to verify the accuracy of three published methods (exact method by Ondra, FBI method by Le Huec and spinofemoral angle method by Lamartina) to preoperatively calculate the needed correction. Design This is a retrospective cohort study. Methods Fifteen patients treated for correction of sagittal imbalance, with preoperative and postoperative lateral standing whole spine radiographs, were identified. Preoperative calculation of the amount of needed correction has been done using these methods. In postoperative X-rays, the amount of correction obtained with and the degree of correction of sagittal imbalance have been measured. Results and discussion The FBI and SFA methods obtain equivalent calculations of the amount of needed correction. The estimated correction angle with both methods is higher than that calculated with the exact trigonometric method. The difference between the latter and the former methods is equivalent to the observed excess of pelvic tilt.

Preoperative calculation of the necessary correction in sagittal imbalance surgery: validation of three predictive methods / P. Berjano, R. Cecchinato, M. Damilano, C. Morselli, V. Sansone, C. Lamartina. - In: EUROPEAN SPINE JOURNAL. - ISSN 0940-6719. - 22:Suppl 6(2013 Nov), pp. 847-852.

Preoperative calculation of the necessary correction in sagittal imbalance surgery: validation of three predictive methods

R. Cecchinato
Secondo
;
M. Damilano;V. Sansone
Penultimo
;
2013

Abstract

Introduction Surgery for correction of sagittal imbalance has frequent adverse events and complications. The most frequent cause of failure is inadequate correction of imbalance. The aim of this study is to verify the accuracy of three published methods (exact method by Ondra, FBI method by Le Huec and spinofemoral angle method by Lamartina) to preoperatively calculate the needed correction. Design This is a retrospective cohort study. Methods Fifteen patients treated for correction of sagittal imbalance, with preoperative and postoperative lateral standing whole spine radiographs, were identified. Preoperative calculation of the amount of needed correction has been done using these methods. In postoperative X-rays, the amount of correction obtained with and the degree of correction of sagittal imbalance have been measured. Results and discussion The FBI and SFA methods obtain equivalent calculations of the amount of needed correction. The estimated correction angle with both methods is higher than that calculated with the exact trigonometric method. The difference between the latter and the former methods is equivalent to the observed excess of pelvic tilt.
Exact method; FBI method; Sagittal imbalance; SFA method
Settore MED/33 - Malattie Apparato Locomotore
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/228362
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