Table 3.

Adverse events from ultrasound-guided intervention.

Frequency of long-term adverse events
	Rarely	Occasionally	Sometimes	Frequently	Nearly always
N	319	14	2	0	0
%	95.2	4.2	0.6	0.0	0.0

Types of adverse events				N	%
Pain at the area of treatment				264	73.4
Bruise or hematoma at the area of treatment				209	62.4
Infection at the area of treatment (swelling, heat sensation)				34	10.1
Paresthesia				49	14.6
Worsening of existing symptoms				38	11.3
Tiredness/drowsiness				29	8.7