Article Figures & Data
Figures
- Fig. 1
An interspinous process fusion device demonstrating polyaxial properties.
Tables
n No. patients 53 Age at surgery 60 years Sex (Male:Female) 24:29 Initial Diagnosis Spinal Stenosis 24 Herniated Disc 10 Spondylolisthesis 5 Follow-up period (average) 22 months Follow-up rate 94% (50/53) - Table 2
Pre- and postoperative pain scores collected through a retrospective chart review. Outcome scores were collected at a minimum 1 year postoperative time point. Note that there was a significant improvement in the overall pain score in all groups except for patients with a low (<5/10) preoperative pain score. All surgical indications other than primary disc herniation had significant improvement in overall pain score after interspinous process fusion.
Preoperative Pain Score Postoperative Pain Score Paired t-test p value Overall 7.2 ± 1.7 4.5 ± 2.8 0.0001* Male 7.1 ± 1.8 4.2 ± 2.9 0.001* Female 7.2 ± 1.6 4.7 ± 2.8 0.001* Age > 59 7.3 ± 1.9 5.3 ± 3.0 0.05* Age ≤ 59 7.1 ± 1.6 3.9 ± 2.6 0.001* Preoperative pain ≥ 8/10 8.5 ± 0.7 5.0 ± 3.1 0.0001* Preoperative pain < 5/10 4.4 ± 0.8 4.4 ± 2.5 > 0.05 BMI ≥ 30 7.4 ± 1.5 5.4 ± 2.8 0.01* BMI < 30 7.1 ± 1.8 4.0 ± 2.7 0.0001* Diagnosis Stenosis 7.4 ± 1.5 4.5 ± 2.8 0.0001* Herniated Disc 7.0 ± 2.0 4.8 ± 3.3 > 0.05 Spondylolisthesis 7.8 ± 1.6 3.2 ± 3.1 0.01* Operative Level L2-3 7.0 ± 1.2 5.8 ± 1.1 > 0.05 L3-4 7.4 ± 2.1 4.5 ± 3.3 > 0.05 L4-5 7.5 ± 1.4 4.3 ± 2.4 0.001* L5-S1 5.9 ± 1.7 3.8 ± 3.3 > 0.05 - Table 3
Representation of successful Macnab outcome scores (excellent or good) by patient demographics, diagnosis and operative level. There was not a significant difference in success when stratified by gender, diagnosis or operative level. There was a significantly higher rate of surgical success in patients aged over 59 years compared to those less than 59 years old.
Excellent/Good Fair/Poor Overall 6/18 (48%) 21/5 (52%) Male 3/9 (55%) 8/2 (43%) Female 3/9 (43%) 13/3 (57%) Age > 59 5/12 (59%) 11/1 (41%) Age ≤ 59 1/6 (33%) 10/4 (67%) Preoperative pain ≥ 8/10 5/7 (48%) 10/3 (52%) Preoperative pain < 5/10 2/4 (67%) 3/0 (33%) BMI ≥ 30 2/2 (24%) 10/3 (76%) BMI < 30 4/16 (61%) 11/2 (39%) Diagnosis: Stenosis 3/10 (54%) 9/2 (46%) Herniated Disc 2/2 (80%) 1/0 (20%) Spondylolisthesis 0/3 (33%) 6/0 (67%) Operative Level L2-3 0/0 (0%) 3/1 (100%) L3-4 2/4 (55%) 5/0 (45%) L4-5 2/9 (55%) 8/1 (45%) L5-S1 1/3 (57%) 3/0 (43%)
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