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Zhuo Xi, Shane Burch, Praveen V. Mummaneni, Rory Richard Mayer, Charles Eichler and Dean Chou

to lumbar stenosis and disc herniations. 3 , 4 Because of the changing demographics of the modern world, spine surgeons are treating more obese patients, and obesity is an important risk factor that cannot be ignored. It has been shown that obese patients undergoing open surgery have increased blood loss, higher complication rates, and longer operative times. 5 However, for obese patients undergoing minimally invasive surgery (MIS), these differences may not be significant. 5–9 Oblique lumbar interbody fusion (OLIF) is a type of a minimally invasive lumbar

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Martin H. Pham, Andre M. Jakoi and Patrick C. Hsieh

Lumbar interbody fusion is an important technique for the treatment of degenerative disc disease and degenerative scoliosis. The oblique lumbar interbody fusion (OLIF) establishes a minimally invasive retroperitoneal exposure anterior to the psoas and lumbar plexus. In this video case presentation, the authors demonstrate the techniques of the OLIF at L5–S1 performed on a 69-year-old female with degenerative scoliosis as one component of an overall strategy for her deformity correction.

The video can be found here: https://youtu.be/VMUYWKLAl0g.

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Chih-Chang Chang, Joshua Rivera, Brenton Pennicooke, Dean Chou and Praveen V. Mummaneni

Adult spinal deformity (ASD) is an increasing disease entity as the population ages. An emerging minimally invasive surgery (MIS) option for the treatment of ASD is the oblique lumbar interbody fusion (OLIF), which allows indirect foraminal decompression of stenosis as well as segmental deformity correction (DiGiorgio et al., 2017). The authors utilize computer-assisted navigation with OLIF to reduce radiation exposure and improve time efficiency. The authors present a video of navigated oblique lumbar interbody fusion at L3–5 followed by open posterior screw-rod fixation.

The video can be found here: https://youtu.be/zKDT7PhMYf8.

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Anthony M. DiGiorgio, Caleb S. Edwards, Michael S. Virk, Praveen V. Mummaneni and Dean Chou

G , Seex K , Rao PJ : Lumbar interbody fusion: techniques, indications and comparison of interbody fusion options including PLIF, TLIF, MI-TLIF, OLIF/ATP, LLIF and ALIF . J Spine Surg 1 : 2 – 18 , 2015 27683674 8 Molinares DM , Davis TT , Fung DA : Retroperitoneal oblique corridor to the L2–S1 intervertebral discs: an MRI study . J Neurosurg Spine 24 : 248 – 255 , 2016 26451662 10.3171/2015.3.SPINE13976 9 Moller DJ , Slimack NP , Acosta FL Jr , Koski TR , Fessler RG , Liu JC : Minimally invasive lateral lumbar interbody

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Christopher Wilkerson, Vance Mortimer, Andrew T. Dailey and Marcus D. Mazur

, Phan K , Malham G , Seex K , Rao PJ : Lumbar interbody fusion: techniques, indications and comparison of interbody fusion options including PLIF, TLIF, MI-TLIF, OLIF/ATP, LLIF and ALIF . J Spine Surg 1 : 2 – 18 , 2015 6 Woods KR , Billys JB , Hynes RA : Technical description of oblique lateral interbody fusion at L1–L5 (OLIF25) and at L5–S1 (OLIF51) and evaluation of complication and fusion rates . Spine J 17 : 545 – 553 , 2017

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Daehyun Park, Praveen V. Mummaneni, Ratnesh Mehra, Yonguk Kwon, Sungtae Kim, Hui Bing Ruan and Dean Chou

.7% in FA, and 33.1% in CCD. Only 2 patients (9.5%) required secondary additional posterior decompression. 13 Sato et al. reported that 20 patients with oblique lateral interbody fusion (OLIF) showed a significant increase in DH (61%), FA (21% on the right, 39% on the left), and sagittal CCD (32%). Posterior decompression was not performed in any of their patients. 17 Although indirect decompression seems to be effective for many degenerative lumbar conditions, it is still unclear if all patients can be treated with indirect decompression only. Radiographic and

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Dong Hwa Heo and Jin-Sung Kim

L umbar interbody fusion surgery is a common and effective treatment for lumbar degenerative disease. 5 , 11 , 14 Minimally invasive spinal fusion surgeries, such as mini–anterior lumbar interbody fusion (ALIF) and transforaminal lumbar interbody fusion (TLIF), are performed to minimize the injury to posterior lumbar myoligamentous structures. Minimally invasive lateral lumbar interbody fusion (LLIF) surgeries, such as direct lateral interbody fusion (DLIF) and oblique lumbar interbody fusion (OLIF), have been attempted recently to treat lumbar degenerative

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Sandro M. Krieg, Nele Balser, Haiko Pape, Nico Sollmann, Lucia Albers and Bernhard Meyer

, further spinal canal and foraminal decompression via laminectomy or hemilaminectomy were performed in all patients with respect to the clinical symptoms. In total, 288 patients (89.4%) underwent fusion in the same surgery, which was done via transforaminal lumbar interbody fusion (TLIF) in 73.3%, anterior lumbar interbody fusion (ALIF) in 18.4%, extreme lateral interbody fusion (XLIF) in 3.1%, and oblique lumbar interbody fusion (OLIF) in 0.3% of these cases; 3.1% of patients were treated with combined TLIF and ALIF, 1.1% with combined TLIF and XLIF, and 0.7% with

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Ki Young Lee, Jung-Hee Lee, Kyung-Chung Kang, Won-Ju Shin, Sang Kyu Im and Seong Jin Cho

database included 119 patients, and after applying the inclusion criteria, 77 patients were identified for analysis. The patients consisted of 2 men and 75 women. The mean age at surgery was 71.7 ± 5.1 years, and the mean follow-up length was 32.0 ± 12.7 months (36.7 ± 9.8 months in the non-FR group and 16.8 ± 4.7 months in the FR group). The mean number of fused segments was 8, and PSO was performed in 49 patients at the L2 level. Interbody fusion (except L5–S1) was performed in 26 patients who underwent the oblique lumbar interbody fusion (OLIF; 77 segments) and 36

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Jeffery R. Head, George N. Rymarczuk, Kevin D. He and James S. Harrop

: 674 – 678 , 2017 10.1016/j.wneu.2017.05.062 28532911 22 Woods KRM , Billys JB , Hynes RA : Technical description of oblique lateral interbody fusion at L1-L5 (OLIF25) and at L5-S1 (OLIF51) and evaluation of complication and fusion rates . Spine J 17 : 545 – 553 , 2017 27884744 10.1016/j.spinee.2016.10.026 23 Yuan PS , Rowshan K , Verma RB , Miller LE , Block JE : Minimally invasive lateral lumbar interbody fusion with direct psoas visualization . J Orthop Surg Res 9 : 20 , 2014 24666669 10.1186/1749-799X-9-20