From: Ultrasound-guided percutaneous peripheral nerve stimulation for analgesia following total knee arthroplasty: a prospective feasibility study
Subject
Days since surgery
At rest
Stimulation
% Change
Off
On
A
8
3
1
67%
B
9
0
100%
C
13
7
D
41
5
E
58
Mean
26
5.0
0.2
93%