Comparision of Lumbar Lordosis According to Different Operative Positions.
- Author:
Chang Ho CHOI
1
;
Young Do KOH
;
Dong Jun KIM
;
Jong Oh KIM
Author Information
1. Department of Orthopaedic Surgery, College of Medicine, Ewha Womans University, Seoul, Korea. ydkoh@mm.ewha.ac.kr
- Publication Type:Original Article
- Keywords:
Lumbar lordosis;
Intraoperative position
- MeSH:
Animals;
Hip;
Lordosis*;
Spine;
Thorax;
Volunteers
- From:Journal of Korean Society of Spine Surgery
2000;7(1):77-82
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STUDY DESIGN: A study was designed to compare lumbar lordosis in different positions. OBJECTIVES: The aim of this study was to document the changes of segmental and total lumbar lordosis in common operative positions of lumbar spine. SUMMARY OF LITERATURE REVIEW: It is very important to maintain physiologic lumbar lordosis in instrumentation of lumbar spine. MATERIALS AND METHODS: Twenty-six asymptomatic volunteers underwent a series of four lateral lumbar radiographs ; standing, prone on chest roll and prone on Wilson spine table with hip flexion of 60 and 20 degree. Lumbar lordosis and segmental lordotic angle were compared and analyzed regarding to positions. Lordosis in stading position was assumed to be physiologic. RESULTS: In chest roll position, physiologic lordosis was preserved, but segmental lordotic angles of L3-L4 and L4-L5 significantly decreased compared with those in standing position. Total lumbar lordosis in the Wilson table with hip flexion of 60 degree and 20 degree was decreased 42% and 22%, respectively. In Wilson table, segmental lordotic angles of L1-L2, L2-L3, L3-L4 and L4-L5 were significantly decreased compared with those in standing position. CONCLUSIONS: Physiologic lordosis was preserved only under chest roll. Segmental lordotic angles of L5-S1 was not influenced by positions.
