Table 4.

Details of complications

Complication	No.	No. of cases occurred
Residue	3	3rd†, 13th†, 68th†
Dural tear	4	21st*, 30th*, 46th†, 139th*
Epidural hematoma	2	75th†, 164th*
Nerve root injury	3	36th*, 55th*, 98th*

^*Unilateral biportal endoscopy unilateral laminotomy bilateral decompression.

^†Unilateral biportal endoscopy lumbar discectomy.