Clinical Results of 10-mm Endoscopic Minimally Invasive Interlaminar Decompression in the Treatment of Lumbar Spinal Stenosis with Degenerative Lumbar Scoliosis and Simple Lumbar Spinal Stenosis

Figures & data

Figure 1 Flowchart of patient eligibility screening.

Figure 2 (A) Intraoperative anterior-posterior image. (B) Intraoperative lateral image. (C) Endoscope burr in use. (D) Removed compression-causing tissue.

Table 1 Demographic Characteristics of the Two Groups

Items	LSS	LSS with DLS	p value
Number of patients	129	46
Age (years)	69.89±7.29	71.43±7.89	0.250
Sex			0.068
Male	65	16
Female	64	30
BMI	24.43±3.06	23.97±3.13	0.383
Disease duration (m)	18.53±16.99	19.72±16.95	0.626
Level			0.202
L1/2	1	0
L2/3	3	1
L3/4	7	7
L4/5	93	33
L5/S1	24	5

Table 2 Perioperative Indicators and Complications of the Two Groups

Outcome Measure	LSS	LSS with DLS	p value
Operation time (min)	43.53±8.04	45.43±9.06	0.138
Length of postoperative stay (d)	3(2, 3)	3(2, 4)	0.255
Major Complication	8(6.2%)	4(8.7%)	0.517
Revision surgery	2	1
Transient dysesthesia	5	2
Intraoperative dura tear	1	1
Infection	0	0

Figure 3 Clinical outcomes of patients in both groups at different follow-up time points. (A) VAS-back pain score (☆: P < 0.05). (B) VAS-leg pain score. (C) Oswestry Disability Index. (D) the Modified Macnab criteria.

Table 3 Comparison of Imaging Parameters Between the Two Groups of Patients

Items	LSS		P-value	LSS with DLS		P-value
	Preoperative	Final Follow Up	VS Pre-Op	Preoperative	Final Follow Up	VS Pre-Op
LL	35.8±11.7	39.0±8.4	<0.001	36.3±13.3	40.3±8.6	0.014
SS	30.2±10.1	31.0±8.8	0.249	32.1±11.5	35.6±8.3	0.004
PT	15.2±8.2	14.6±7.6	0.170	19.3±10.4*	18.5±9.1*	0.204
PI	45.4±9.8	45.6±8.8	0.829	51.4±11.4*	53.0±11.0*	0.261
PI-LL	13.8±7.7	10.4±7.1	<0.001	19.4±11.1*	14.4±8.6*	0.001
Cobb angle (°)	NA	NA	NA	17.2±4.9	18.0±4.4	0.100

Note: *Significantly different from the LSS group (P < 0.05).

Abbreviations: LL, Lumbar lordosis; SS, Sacral slope; PT, Pelvic tilt; PI, Pelvic incidence; PI-LL, Pelvic incidence-lumbar lordosis.

Figure 4 Imaging images of an 83-year-old DLS patient with L4/5 as the responsible segment. (A and B) X-rays showing degenerative deformity of the patient’s lumbar spine. (C and E) Preoperative lumbar MRI (Magnetic Resonance Imaging) showed severe spinal stenosis. (D and F) Axial CT (Computed Tomography) images of the lumbar spine show adequate decompression.

Data Sharing Statement

The data used to support the findings of this study are available from the corresponding author upon request.