A Novel Selective Block of the Suprascapular Nerve

June 16, 2014 updated by: Lars Marius Ytrebo, University Hospital of North Norway
Patients who receive the lateral and sagittal infraclavicular block (LSIB) tend to supinate their hand and forearm which may hamper optimal positioning for surgery of the dorsal side of the hand. The investigators think that this supination is caused by lateral rotation in the shoulder. The main lateral rotator of the shoulder is the infraspinatus muscle, which is innervated by the suprascapular nerve (SSN).The investigators hypothesized that optimal positioning of the hand for surgery on the dorsal side of the hand may be achieved by performing a SSN block (SSNB) in addition to the LSIB.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

According to the hypothesis the investigators will perform a double blind , placebo controlled study to answer the research question above.

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Norway
    • Troms
      • Tromsø, Troms, Norway, 9038
        • University Hospital of North Norway

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with American Society of Anesthesiologists physical status (ASA) I- III
  • age between 18 and 70 years
  • body mass index between 20 and 36 kg/m2 scheduled for elective hand surgery.

Exclusion Criteria:

We will measure the angle between wrist and horizontal plane while the patient is supine and the extended arm 75° abducted.

  • Patient who are not able to pronate the hand ≤15° before block performance, will be excluded from the study.
  • Patients will also be excluded if they are pregnant, have contraindications to regional anesthesia, coagulation disorder, allergy to local anesthetics (LA), atrioventricular block, peripheral neuropathy or drug-treated diabetes.
  • Patients using other anticoagulation drugs than acetylsalicylic acids or dipyridamol will be excluded.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: LSIB +SSNB
Patients will receive LSIB (31 ml ropivacaine 7.5 mg/ml)+ SSNB (4 ml Ropivacaine 5 mg/ml)
Procedure: LSIB + SSNB
Patients will receive LSIB (31 ml ropivacaine 7.5 mg/ml)+ SSNB (4 ml Ropivacaine 5 mg/ml) or LSIB (31 ml ropivacaine 7.5 mg/ml)+ SSNB (4 ml placebo, saline)
Placebo Comparator: LSIB + placebo
Patients will receive LSIB (31 ml ropivacaine 7.5 mg/ml) + SSNB (4 ml saline)
Procedure: LSIB + SSNB
Patients will receive LSIB (31 ml ropivacaine 7.5 mg/ml)+ SSNB (4 ml Ropivacaine 5 mg/ml) or LSIB (31 ml ropivacaine 7.5 mg/ml)+ SSNB (4 ml placebo, saline)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Wrist angle
Time Frame: 30 minutes
The investigators will assess the wrist angle 30 minutes after the two blocks (LSIB + SSNB)
30 minutes

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Satisfaction score
Time Frame: 3 hours
The investigators will ask the surgeons about his/her satisfaction with the hand position during surgery.
3 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital of North Norway

Collaborators

University of Tromso

Investigators

  • Principal Investigator: Lars M Ytrebø, Professor, University Hospital of North Norway

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2014

Primary Completion (Actual)

June 1, 2014

Study Completion (Actual)

June 1, 2014

Study Registration Dates

First Submitted

January 12, 2014

First Submitted That Met QC Criteria

January 13, 2014

First Posted (Estimate)

January 14, 2014

Study Record Updates

Last Update Posted (Estimate)

June 17, 2014

Last Update Submitted That Met QC Criteria

June 16, 2014

Last Verified

June 1, 2014

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • SSNB

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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