Hwee Weng Dennis Hey1, Eugene Tze-Chun Lau2, Joel-Louis Lim2, Denise Ai-Wen Choong3, Chuen-Seng Tan4, Gabriel Ka-Po Liu2, Hee-Kit Wong2. 1. University Orthopaedics, Hand and Reconstructive Microsurgery (UOHC), National University Health System, 1E Kent Ridge Rd, NUHS Tower Block Level 11, Singapore 119228, Singapore. Electronic address: dennis_hey@nuhs.edu.sg. 2. University Orthopaedics, Hand and Reconstructive Microsurgery (UOHC), National University Health System, 1E Kent Ridge Rd, NUHS Tower Block Level 11, Singapore 119228, Singapore. 3. Department of Diagnostic Imaging, National University Health System, 1E Kent Ridge Rd, NUHS Tower Block Level 12, Singapore 119228, Singapore. 4. Saw Swee Hock School of Public Health, Tahir Foundation Building, National University of Singapore, 12 Science Drive 2, #10-01, Singapore 117549, Singapore.
Abstract
BACKGROUND CONTEXT: Flexion radiographs have been used to identify cases of spinal instability. However, current methods are not standardized and are not sufficiently sensitive or specific to identify instability. PURPOSE: This study aimed to introduce a new slump sitting method for performing lumbar spine flexion radiographs and comparison of the angular range of motions (ROMs) and displacements between the conventional method and this new method. STUDY DESIGN: This study used is a prospective study on radiological evaluation of the lumbar spine flexion ROMs and displacements using dynamic radiographs. PATIENT SAMPLE: Sixty patients were recruited from a single spine tertiary center. OUTCOME MEASURE: Angular and displacement measurements of lumbar spine flexion were carried out. METHOD: Participants were randomly allocated into two groups: those who did the new method first, followed by the conventional method versus those who did the conventional method first, followed by the new method. A comparison of the angular and displacement measurements of lumbar spine flexion between the conventional method and the new method was performed and tested for superiority and non-inferiority. RESULTS: The measurements of global lumbar angular ROM were, on average, 17.3° larger (p<.0001) using the new slump sitting method compared with the conventional method. They were most significant at the levels of L3-L4, L4-L5, and L5-S1 (p<.0001, p<.0001 and p=.001, respectively). There was no significant difference between both methods when measuring lumbar displacements (p=.814). CONCLUSION: The new method of slump sitting dynamic radiograph was shown to be superior to the conventional method in measuring the angular ROM and non-inferior to the conventional method in the measurement of displacement.
RCT Entities:
BACKGROUND CONTEXT: Flexion radiographs have been used to identify cases of spinal instability. However, current methods are not standardized and are not sufficiently sensitive or specific to identify instability. PURPOSE: This study aimed to introduce a new slump sitting method for performing lumbar spine flexion radiographs and comparison of the angular range of motions (ROMs) and displacements between the conventional method and this new method. STUDY DESIGN: This study used is a prospective study on radiological evaluation of the lumbar spine flexion ROMs and displacements using dynamic radiographs. PATIENT SAMPLE: Sixty patients were recruited from a single spine tertiary center. OUTCOME MEASURE: Angular and displacement measurements of lumbar spine flexion were carried out. METHOD:Participants were randomly allocated into two groups: those who did the new method first, followed by the conventional method versus those who did the conventional method first, followed by the new method. A comparison of the angular and displacement measurements of lumbar spine flexion between the conventional method and the new method was performed and tested for superiority and non-inferiority. RESULTS: The measurements of global lumbar angular ROM were, on average, 17.3° larger (p<.0001) using the new slump sitting method compared with the conventional method. They were most significant at the levels of L3-L4, L4-L5, and L5-S1 (p<.0001, p<.0001 and p=.001, respectively). There was no significant difference between both methods when measuring lumbar displacements (p=.814). CONCLUSION: The new method of slump sitting dynamic radiograph was shown to be superior to the conventional method in measuring the angular ROM and non-inferior to the conventional method in the measurement of displacement.
Authors: Hwee Weng Dennis Hey; Denise Ai Wen Choong; Adrian Zhigao Lin; Eugene Tze-Chun Lau; Alex Quok An Teo; Gabriel Liu; Hee-Kit Wong Journal: J Spine Surg Date: 2018-12
Authors: Nathan J Lee; Justin Mathew; Jun S Kim; Joseph M Lombardi; Andrew C Vivas; Jay Reidler; Scott L Zuckerman; Paul J Park; Eric Leung; Meghan Cerpa; Mark Weidenbaum; Lawrence G Lenke; Ronald A Lehman; Zeeshan M Sardar Journal: J Spine Surg Date: 2021-03