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Endoscopic interlaminar lumbar discectomy with splitting of the ligament flavum under visual control

STUDY DESIGN: Technical report and cases series. OBJECTIVE: To present the technique of interlaminar endoscopic lumbar discectomy (ED) with ligamentum flavum (LF) splitting under direct visualization. SUMMARY OF BACKGROUND DATA: The most distinguishing advantage of ED is a decrease in tissue trauma, which has been associated postoperatively with less back pain and less adhesion or scar tissue formation. In transforaminal ED the LF is completely spared, whereas in interlaminar ED the LF must be removed under direct visualization, no matter how small the opening may be (3 to 5 mm). It is also possible to keep the LF intact using serial dilators, but this procedure cannot be performed under direct visualization. METHODS: We performed operations on 16 male and 14 female patients with herniated lumbar disc disease using interlaminar ED with LF splitting under direct visual control. The average age of the patients in the study was 48+/-15 years. The chief complaint before surgery was radiculopathy confined to 1 leg. The anatomic operative level was L3-4 in 1, L4-5 in 13, and L5-S1 in 16 patients. The ruptured disc had migrated superiorly in 4 cases and inferiorly in 7 cases, and intraoperative electromyographic monitoring was performed in all surgeries. The LF was split with a working channel under direct visualization, and after withdrawing the working channel the split LF closed on its own. The total operation time was 20 to 40 minutes, and the follow-up period was 149+/-108 days. RESULTS: There were no abnormal signals on the intraoperative electromyography in any of the cases, and the reported symptoms immediately improved in all patients after the operation. Follow-up magnetic resonance imaging showed a disappearance of the ruptured disc with almost no defect in the LF. There were no operation-associated complications. CONCLUSIONS: The LF could be safely split under direct visualization using a working channel with a minimal resulting defect. This technique of LF splitting endoscopic discectomy is a feasible approach, even for migrated disc herniation

Keywords : Adult,Aged,Back,Back Pain,complications,Diskectomy,Electromyography,Endoscopy,Female,Humans,Intervertebral Disc Displacement,Leg,Ligamentum Flavum,Lumbar Vertebrae,Magnetic Resonance Imaging,Male,methods,Middle Aged,Neurosurgery,Pain,pathology,Patients,Radiculopathy,surgery,Time,Treatment Outcome,Universities,, Interlaminar,Lumbar,Discectomy,With,Splitting, london pain clinic fees

Date of Publication : 2012 Jun

Authors : Kim CH;Chung CK;

Organisation : Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea

Journal of Publication : J Spinal Disord Tech

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/21423050

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