Long-Term Objective Physical Activity Measurements using a Wireless Accelerometer Following Minimally Invasive Transforaminal Interbody Fusion Surgery

Abstract

We report on a case of a patient who underwent minimally invasive transforaminal lumbar interbody fusion (mi-TLIF) with objective physical activity measurements performed preoperatively and postoperatively at up to 12-months using wireless accelerometer technology. In the first postoperative month following surgery, the patient had reduced mobility, taking 2,397 steps over a distance of 1.8 km per day. However, the number of steps taken and distance travelled per day had returned to baseline levels by the second postoperative month. At one-year follow-up, the patient averaged 5,095 steps per day in the month over a distance of 3.8 km; this was a 60% improvement in both steps taken and distance travelled compared to the preoperative status. The use of wireless accelerometers is feasible in obtaining objective physical activity measurements before and after lumbar interbody fusion and may be applicable to other related spinal surgeries as well.

Keywords: Accelerometer; Fitbit; Fusion; Objective measurement; Physical activity; Transforaminal interbody fusion surgery.

Conflict of interest statement

Conflict of Interest: No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1. Postoperative outcome. (A) Incision profile. (B) Standing X-rays at 3 months postoperative.

Fig. 2. Average steps per day at monthly follow-up.

Fig. 3. Average distance travelled per day at monthly follow-up.