A Novel Capsule Lumbar Interbody Fusion (CLIF) in Treating Foot Drop due to Lumbar Degenerative Diseases: a Prospective, Observational Study

Table 4

IoUS parameters of L5 nerve root before and after surgery in the TLIF group and CLIF group.

Parameters (median (range))		TLIF	CLIF	value
Diameter of L5 nerve root, mm	Pre	1.5 (1.3–1.6)	1.4 (1.3–1.6)	0.933
	Post	1.6 (1.5–2.0)	2.0 (1.9–2.2)	<0.001
	Change	0.2 (0.1–0.7))	0.6 (0.5–0.7)	<0.001
Time interval before peaking (s)	Pre	37.1 (30.3–41.9)	37.5 (28.7–43.4)	>0.999
	Post	27.8 (20.9–34.8)	20.8 (14.9–30.2)	0.019
	Change	8.6 (2.6–16.1)	12.7 (7.3–21.9)	0.038
Peak value of L5 nerve root (×10^−5)	Pre	3.1 (1.6–3.5)	2.7 (1.5–3.6)	0.492
	Post	3.7 (1.9–4.7)	4.8 (3.5–5.9)	0.002
	Change	0.5 (0.1–1.9)	2.0 (1.0–3.3)	<0.001

indicates a statistical difference of the parameter at different time points after surgery compared with that at preoperation. IoUS: intraoperative ultrasonography.