Reliability of the new modified Moro's classification and oblique corridor grading to assess the feasibility of oblique lumbar interbody fusion

Arun-Kumar Kaliya-Perumal; Julia Poh Hwee Ng; Tamara Lee Ting Soh; Wayne Ming Quan Yap; Mark Tan; Chun Sing Yu; Jacob Yoong-Leong Oh

doi:10.1016/j.jor.2020.05.018

Reliability of the new modified Moro's classification and oblique corridor grading to assess the feasibility of oblique lumbar interbody fusion

J Orthop. 2020 Jun 6:21:321-325. doi: 10.1016/j.jor.2020.05.018. eCollection 2020 Sep-Oct.

Authors

Arun-Kumar Kaliya-Perumal^{1

2}, Julia Poh Hwee Ng¹, Tamara Lee Ting Soh¹, Wayne Ming Quan Yap¹, Mark Tan¹, Chun Sing Yu¹, Jacob Yoong-Leong Oh¹

Affiliations

¹ Division of Spine, Department of Orthopedic Surgery, Tan Tock Seng Hospital, Singapore.
² Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore.

Abstract

Introduction: The modified Moro's classification (MMC) of psoas morphology and oblique corridor (OC) grading were recently proposed. Their reliability needs to be tested.

Methods: T2 weighted lumbar disc level axial-cut MRI images of patients with degenerative spondylosis were distributed to five spine surgeons. The inter and intra-rater reliability of MMC and OC grading were calculated based on their ratings.

Results: Based on kappa statistics, we inferred that both MMC and OC grading are reliable measures.

Conclusion: Both MMC and OC grading, in combination, can be used to predict the feasibility of oblique lumbar interbody fusion and aid in patient selection.

Keywords: Lumbosacral region; Psoas muscle; Spinal fusion; Spine; Spondylosis.