Journal of Medical Cases, ISSN 1923-4155 print, 1923-4163 online, Open Access
Article copyright, the authors; Journal compilation copyright, J Med Cases and Elmer Press Inc
Journal website http://www.journalmc.org

Case Report

Volume 6, Number 5, May 2015, pages 205-210

A New Approach to Quantify Functional Improvements Following X-Stop Spacer Procedure: A Case Report

Figures

Figure 1.
Figure 1. Schematic of X-STOP device.
Figure 2.
Figure 2. (A) Preoperative standing lateral radiographs of the patient in extension. (B) Preoperative standing lateral radiographs of the patient in flexion.
Figure 3.
Figure 3. (A) Postoperative standing lateral radiographs of the patient in extension. (B) Postoperative standing lateral radiographs of the patient in flexion.
Figure 4.
Figure 4. Snapshots from the spine model during flexion and angle measurement.
Figure 5.
Figure 5. (A) Flexion angle preoperative/postoperative. (B) Extension angle preoperative/postoperative.
Figure 6.
Figure 6. Normalized muscle activation signal (EMG) during trunk flexion pre-post operation, the dashed vertical lines indicate the maximum flexion, the dashed lines represent preoperative and the solid lines represent postoperative muscle activation of right and left rectus abdominis (A, B), right and left erector spinae (C, D) and right and left biceps femoris (E, F).

Table

Table 1. The Swiss Spinal Stenosis and PROMIS-29 Questionnaire Results
 
PROMIS-29 domainPre-op t-score (SE)Post-op t-score (SE)Change
Physical function43.4 (2.4)56.9 (6.7)Significantly improved
Anxiety51.2 (3.1)51.2 (3.1)Unchanged
Depression41.0 (6.2)41.0 (6.2)Unchanged
Fatigue60.7 (2.3)48.6 (2.5)Significantly improved
Sleep disturbance32.0 (5.2)32.0 (5.2)Unchanged
Satisfaction with social role38.8 (2.1)64.1 (5.1)Significantly improved
Pain interference63.8 (1.8)55.6 (1.9)Significantly improved
Pain intensity7/106/10Improved