Ultrasound Image Quality of the Brachial Plexus at the Interscalene Space Before and After Shoulder Arthroscopy

Completed

Conditions studied: Pain, Postoperative

In brief

Ultrasound guided interscalene nerve blockade with local anesthesia is a standard regional anesthetic technique for providing postoperative analgesia during shoulder arthroscopy and wide variety of shoulder procedures. There is a paucity of data regarding the effects of shoulder arthroscopy on ultrasound image quality, including the effects of muscle mobilization and the use of large volume irrigation and subsequent tissue absorption, though increased neck circumference and airway edema are known complications of arthroscopic shoulder procedures. The objective of the study is to determine if there is a difference in ultrasound image quality of the interscalene block anatomy, by Likert scale, pre- versus post-operatively in a cohort of patients undergoing shoulder arthroscopy who routinely receive blockade of the brachial plexus for postoperative analgesia. Further, if there are differences in imaging quality, correlations with surgical and patient factors will be studied.

Key facts

Study ID

NCT03657173

Run by

Mayo Clinic

People needed

30

Starts

2018-06-18

Expected to finish

2018-11-30

Last updated by the study team

2019-01-30

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Subject is undergoing shoulder procedures involving arthroscopy
• Subject has consented to interscalene blockade for postoperative analgesia

You may not qualify if…

• Patient refusal
• Contraindications to interscalene blockade, including significant pulmonary insufficiency, hemi-diaphragmatic paralysis, brachial plexus or degenerative neuropathy
• Allergy to proposed local anesthetic medication\\
• Severe cervical spine disease.
• BMI >40 kg/m2
• Neck Circumference > 50cm
• Failed preoperative interscalene blockade
• Patients known to be currently pregnant or actively breastfeeding
• Patients where English is a language barrier

Where it is running

• Mayo Clinic — Rochester, Minnesota, United States

Full record on ClinicalTrials.gov

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