{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T17:51:12Z","timestamp":1770227472187,"version":"3.49.0"},"reference-count":30,"publisher":"Asian Spine Journal (ASJ)","issue":"1","license":[{"start":{"date-parts":[[2022,7,4]],"date-time":"2022-07-04T00:00:00Z","timestamp":1656892800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["asianspinejournal.org"],"crossmark-restriction":true},"short-container-title":["Asian Spine J"],"published-print":{"date-parts":[[2023,2,28]]},"abstract":"<jats:p>Study Design: Retrospective cohort study.Purpose: To evaluate the clinical and radiological effects of epidural fluid hematoma in the medium term after lumbar endoscopic decompression.Overview of Literature: There is limited literature comparing the effect of postoperative epidural fluid hematoma after uniportal endoscopic decompression.Methods: Magnetic resonance imaging (MRI) and clinical evaluation were performed for patients with single-level uniportal endoscopic lumbar decompression with a minimum follow-up of 2 years.Results: A total of 126 patients were recruited with a minimum follow-up of 26 months. The incidence of epidural fluid hematoma was 27%. Postoperative MRI revealed a significant improvement in the postoperative dura sac area at postoperative day 1 and at the upper endplate at 6 months in the hematoma cohort (39.69\u00b115.72 and 26.89\u00b116.58 mm&lt;sup&gt;2&lt;\/sup&gt;) as compared with the nonhematoma cohort (48.92\u00b121.36 and 35.1\u00b120.44 mm&lt;sup&gt;2&lt;\/sup&gt;), respectively (&lt;i&gt;p&lt;\/i&gt; &lt;0.05); and at the lower endplate on postoperative 1 day in the hematoma cohort (51.18\u00b124.69 mm&lt;sup&gt;2&lt;\/sup&gt;) compared to the nonhematoma cohort (63.91\u00b127.92 mm&lt;sup&gt;2&lt;\/sup&gt;) (&lt;i&gt;p&lt;\/i&gt; &lt;0.05). No significant difference was observed in the dura sac area at postoperative 1 year in both cohorts. The hematoma cohort had statistically significant higher postoperative 1-week Visual Analog Scale (VAS; 3.32\u00b10.68) pain and Oswestry Disability Index (ODI; 32.65\u00b15.56) scores than the nonhematoma cohort (2.99\u00b10.50 and 30.02\u00b14.84, respectively; &lt;i&gt;p&lt;\/i&gt; &lt;0.05). No significant difference was found at the final follow-up VAS, ODI, and MRI dura sac area.Conclusions: Epidural fluid hematoma is a common early postoperative MRI finding in lumbar endoscopic unilateral laminotomy with bilateral decompression. Conservative management is the preferred treatment option for patients who do not have a neurological deficit. Symptoms last only a few days and are self-limiting. A common endpoint is a remodeled fluid hematoma and the subsequent expansion of the dura sac area.<\/jats:p>","DOI":"10.31616\/asj.2021.0366","type":"journal-article","created":{"date-parts":[[2022,7,4]],"date-time":"2022-07-04T07:48:47Z","timestamp":1656920927000},"page":"118-129","update-policy":"https:\/\/doi.org\/10.31616\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Remodeling of Epidural Fluid Hematoma after Uniportal Lumbar Endoscopic Unilateral Laminotomy with Bilateral Decompression: Comparative Clinical and Radiological Outcomes with a Minimum Follow-up of 2 Years"],"prefix":"10.31616","volume":"17","author":[{"given":"Pang Hung","family":"Wu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyeun 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