ArticleBMC musculoskeletal disorders2026
Robot-assisted unilateral biportal endoscopic lumbar interbody fusion for lumbar spondylolisthesis: ipsilateral direct with contralateral indirect decompression.
Article in BMC musculoskeletal disorders, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveDegenerative lumbar spondylolisthesis often leads to bilateral spinal canal and intervertebral foramen stenosis, yet symptoms frequently present unilaterally. The need for decompression on the asymptomatic or mildly symptomatic side remains a topic of debate.
methodsThere were 28 patients with single-level degenerative lumbar spondylolisthesis (Meyerding grades I/II) with bilateral symptoms were selected for this study. We measured preoperative and postoperative foramen height (FH), foraminal area (FA), disc height (DH), cross-sectional area of spinal canal(CASC), and degree of upper vertebral slip (DUVS). Clinical outcomes were assessed using the visual analog scale (VAS), Oswestry Disability Index (ODI), and the Macnab standard was used to evaluate the efficacy at the last postoperative follow-up.
resultsAll parameters on the surgical side and the contralateral side presented a significant increase compared to preoperative values (P < 0.001). The postoperative values for FH on operative and contralateral sides were 18.13 ± 1.19 mm and 18.49 ± 1.09 mm, for FA were 120.04 ± 23.57 mm2 and 123.07 ± 21.51 mm2, for DH were 8.53 ± 0.77 mm, and the cross-sectional area of spinal canal were 117.29 ± 16.832. The VAS scores and ODI scores for lumbar pain and bilateral leg pain improved significantly.
conclusionSatisfactory ipsilateral direct and contralateral indirect decompression can be achieved by unilateral-approach RA-ULIF.Routine decompression on the contralateral side may not be necessary for patients with bilateral symptoms and bilateral intervertebral foramen stenosis in single-level lumbar spondylolisthesis, barring cases of severe spinal stenosis.
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