Nerve Stimulator Versus Ultrasound-guided Interscalene Block for Shoulder Surgery

Not Applicable

Completed

• Conditions: Pain
• Interventions: Procedure: US-guided interscalene block; Procedure: NS-guided interscalene block

• Registration Number: NCT02342873
• Lead Sponsor: Cheju Halla General Hospital

Brief Summary

The investigators compared the postoperative analgesia of nerve stimulator-guided and ultrasound-guided interscalene block after shoulder surgery.

Detailed Description

Ultrasound (US)-guided peripheral nerve block has increased in popularity. It has many advantages such as improved success rate, faster onset time, fewer needle passes, shorter performance time, and reduced procedural pain and vascular puncture. However, there is no information about postoperative analgesia.

Therefore, the investigators tested whether nerve stimulator (NS) - guided interscalene block was inferior to ultrasound-guided block in terms of duration of postoperative analgesia for shoulder surgery.

Study Timeline

• Study Start: 2014-03
• Study First Submitted: 2014-12-11
• Study First Submitted QC: 2015-01-15
• Study First Posted: 2015-01-21
• Primary Completion: 2015-02
• Study Completion: 2015-02
• Status Verified: 2017-07
• Last Update Submitted: 2017-07-13
• Last Update Posted: 2017-07-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 53

Inclusion Criteria

• American Society of Anesthesiologists physical class I - III patients scheduled to undergo shoulder surgery

Exclusion Criteria

• coagulopathy, severe pulmonary disease, neuropathy, contralateral diaphragmatic paresis, allergy to study medications

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
US-guided interscalene block	US-guided interscalene block	US-guided interscalene block is performed using 20 ml of 0.75% ropivacaine.
NS-guided interscalene block	NS-guided interscalene block	NS-guided interscalene block is performed using 20 ml of 0.75% ropivacaine.

Primary Outcome Measures

Name	Time	Method
duration of postoperative analgesia	at 24h after surgery	time from completion of local anesthetic injection until the first request for an analgesic

Secondary Outcome Measures

Name	Time	Method
patient discomfort (pain score (0 -10) during the procedure)	at 30 min after block placement	pain score (0 -10) during the procedure
paresthesia (presence of paresthesia during the procedure)	at 30 min after block placement	presence of paresthesia during the procedure
motor block of hand	at 30 min after block placement	degree of motor block in the operated hand
onset time (complete block of sensory and motor nerve)	until 30min after completion of local anesthetic	complete block of sensory and motor nerve
The number of needle redirections	at 30 min after block placement	either forward or backward movement of needle at least 1 cm or more
paresthesia of hand	at 30 min after block placement	presence of paresthesia in the operated hand
Pain score	at 24h after surgery	numerical rating scale (0 - 10)
Patient satisfaction	at 24h after surgery	Patient satisfaction was evaluated using a two-point score: 1, satisfactory (if necessary, I would have the same anesthetic technique); and 2, unsatisfactory (different anesthetic technique).
block performance time (the time between the block needle insertion and needle withdrawal)	at 30 min after block placement	the time between the block needle insertion and needle withdrawal.
Supplemental analgesia	at 24h after surgery

Trial Locations

Locations (1)

Cheju Halla General Hopsital; 🇰🇷 Jeju-si, Jeju special governing province, Korea, Republic of