A Review of Unilateral Biportal Endoscopic Decompression for Degenerative Lumbar Canal Stenosis

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Table 1

Summary of case series studies.

Study	Study Design	n	Age, y	Follow-Up, mo	OP Time/Level, min	Blood Loss, mL	Hospital Stay	VAS Leg Pre-OP/PO	VAS Back Pre-OP/PO	ODI Pre-OP/PO	Macnab, %	Complications
Soliman 201527	Prospective	104	52.0	28.0	62.8	60	15.9 h	NR	NR	64.2/3.1	87	5.8%; dural tear (6)
Torudom & Dilokhuttakarn 201626	Retrospective	30	56.0	24.0	98.3	NR	3.16 d	8.3/2.3	7.2/2.4	65.2/24.0	83	6.6%; transient paresthesia (2)
Eum et al 201624	Retrospective	58	63.4	13.8	68.9	NR	NR	8.3/2.4	NR	67.2/24.3	81	13.8%; postoperative headache (3), dural tear (2), transient leg numbness (2), epidural hematoma (1)
Kim & Choi 201822	Retrospective	55	70.7	29.0	53.0	NR	NR	7.7/1.7	NR	67.4/19.3	81	5.5%; dural tear (2); epidural hematoma (1)
Kim & Jung 201920	Retrospective	58	63.1	18.0	NR	NR	NR	7.9/1.6	7.1/1.9	NR	93.1	10.3%; incomplete decompression (4); dural tear (2)
Pao et al 202015	Retrospective	81	70.2	8.6	89.0	NR	NR	7.3/0.9	4.3/4.3	54.6/14.6	93.8	8.6%; dural tear (4); transient motor weakness (1); incomplete decompression (1); epidural hematoma (1)
Overall weighted values			62.2		72.0			7.8/1.7	5.8/1.7	63.0/20.7	87.3

NR, not recorded; ODI, Oswestry Disability Index; OP, operation; PO, postoperative; VAS, visual analog scale.

Table 2

Summary of comparative studies.

Authors	Study Design	Technique (n)	Follow-Up, mo	Age, y	OP Time/ Level, min	VAS Leg Pre-OP	VAS Leg PO	VAS Back Pre-OP	VAS Back PO	ODI Pre-OP	ODI PO	Macnab, %%	Complications
Kim et al 2020¹³	Retrospective	UBE (30)	12	NR	58.1	7.1	1.2	NR	NR	71.2	23.5	76.7	UBE: dural tear (1) MS: dural tear (2), SSI (1)
		MS (30)			62.4	7.3	1.3	NR	NR	72	24.7	73.3	UBE: dural tear (1) MS: dural tear (2), SSI (1)
Min et al 2020¹⁶	Retrospective	UBE (54)	27.2	65.74	NR	7.38	1.48	5.27	1.64	60.4	15.4	NR	UBE: dural tear (1), hematoma (1), re-OP (1) MS: dural tear (1), hematoma (1), re-OP (2)
		MS (35)	31.5	66.74	NR	6.37	1.6	5.34	1.88	61.1	16.4	NR
Heo et al 2018²³	Prospective	UBE (46)	14.5	65.8	61.1	7.97	1.98	7.04	2.07	57.98	21.98	NR	UBE: dural tear (1), hematoma (1) MS: dural tear (1), hematoma (2)
		MS (42)		63.6	58.9	7.76	2.04	6.76	2.21	59.43	22.59	NR
Choi & Kim 2019²¹	Retrospective	UBE (35)	24.5	NR	NR	6.3	2.2	6.8	2.8	NR	NR	NR	Dural tear (2); root injury (1)
		MS (30)
		Fusion (48)
Heo et al 2019¹⁸	Retrospective	UBE (37)	12.5	66.7	62.4	8.05	2.16	7	1.95	58.68	23.14	NR	UBE: dural tear (1), hematoma (1) UE: dural tear (1), hematoma (1) MS: dural tear (2), transient weakness (1), hematoma (2)
		UE (27)		67.3	61.6	7.93	1.89	7	1.8	56.7	23.54	NR
		MS (33)		63.4	56.4	7.67	1.94	6.6	2	56.36	22.58	NR
Ito et al 2021¹¹	Retrospective	UBE (42)	6.7	66.3	57	3.9	1.0	3.9	1.3	23.5	11.3	NR	MED: hematoma (2), dural tear (8), re-OP (2) UBE: dural tear (2)
		MED (139)	6.9	65.0	51	4.5	1.2	3.7	1.5	23.3	12.5	NR

BE, biportal endoscopic; MED, microendoscopic; MS, microscopic; NR, not recorded; ODI, Oswestry Disability Index; OP, operative; PO, postoperative; SSI, surgical site infection;UBE, unilateral biportal endoscopic; UE, uniportal endoscopic; VAS, visual analog scale.