NoL Index Variations Before and After a Stellate Ganglion Block

Evaluation of NoL Index Variations After a Painful Stimulus Before and After a Stellate Ganglion Block in Patients With Upper Extremity Complex Regional Pain Syndrome: a Pilot Study

To evaluate and compare the NoL index variations after a painful physiotherapy exercise in patients with upper limb CRPS, before and after a stellate ganglion block.

Inclusion Criteria:

• Diagnosis of upper limb CRPS according to the Budapest criteria12, for more than 6 months;
• Significant pain relief from stellate ganglion block;
• Undergoing physical therapy;
• 18 years and older.

Exclusion Criteria:

• Patients taking beta blockers

  • Bilateral/generalized CRPS
  • Patients needing sedation for the procedure
  • Inability to understand a Numeric Pain rating Scale due to cognitive dysfunction or linguistic barrier
  • Movement disorder making a person unable to lie still for the duration of the evaluation period.
  • Patient refusal