Table 2.

Complications of Procedures Related to Facet Joints (Values Expressed as Ranges)

	Lumbar, Cervical, Thoracic Intraarticular Facet Joint Injections	Lumbar, Cervical, Thoracic Medial Branch Blocks
Complications47–50	Vasovagal reactions (1.7–2.1%), Pain at injection-site (6.0%), Facial flushing (1.1%), Intravascular injections (1.7%) Steroid-clogged needle (0.4%), Symptom aggravations (0.52–4.3%), Somnolence (2.2%), Transient non-positional headaches (1.6%), Spine infections (0.07%) Uncontrolled hypertension (0.04%)	Vasovagal reactions (<0.01%). Intravascular injections (1.99%), Local bleeding (12.24%), Hematomas (0.22%), Profuse bleeding (0.09%), Bruising (0.05%), Nerve root irritation (0.02%),