Analgesia Duration of Dexamethasone, Buprenorphine, or Clonidine With Ropivacaine for Interscalene Nerve Block

NCT ID: NCT03117140

Last Updated: 2018-07-03

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

160 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-12-31

Study Completion Date

2017-03-31

Brief Summary

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This is a prospective randomized controlled triple-masked study looking at the duration of nerve block analgesia when using the listed adjuvants (dexamethasone, buprenorphine and clonidine) plus ropivacaine versus plain ropivacaine alone.

Detailed Description

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This is a prospective randomized controlled triple-masked study looking at the duration of nerve block analgesia when using the listed adjuvants (dexamethasone, buprenorphine and clonidine) plus ropivacaine versus plain ropivacaine alone. This will be looked on on patients undergoing painful shoulder surgery in the ambulatory surgery center. Patients will be randomized to one of four groups (1. 0.75% plain ropivacaine. The reference comparator 2. A mixture of 0.75% ropivacaine with 300 mcg buprenorphine 3. A mixture of 0.75% ropivacaine with 75 mcg clonidine 4. A mixture of 0.75% ropivacaine with and 8mg dexamethasone) for their regimen in the interscalene block for their surgery. The patients will then be called within 3 days post-operatively to follow-up. Follow-up data collected will be when did the patient experience return of pain to the operative limb (duration of analgesia), when did the patient experience return of motor function of the operative limb (duration of motor block) and when did the patient experience return of sensation of the operative limb (return of sensory block). All three of these adjuvants have been studied previously and shown to have increased analgesic duration with local anesthesia, but have never had a good comparative study. The mechanism of action of the analgesia for these adjuvants pain relief has never been shown although it is likely a indirect effect as there are animal studies looking at their effect on A and C fibers that did not show those results.

Conditions

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Anesthesia, Local

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Plain Ropivacaine

Plain Ropivacaine 0.75%, (225 mg) total volume 32 cc for interscalene block given pre-operatively

Group Type ACTIVE_COMPARATOR

Ropivacaine 0.75%

Intervention Type DRUG

Only ropivacaine 0.75% is administered for this arm of the interscalene block

Ropivacaine + Buprenorphine

A mixture of 0.75% ropivacaine with 300 mcg buprenorphine, total volume 32 cc for interscalene block given pre-operatively

Group Type EXPERIMENTAL

Ropivacaine 0.75% + 300 mcg Buprenorphine

Intervention Type DRUG

Ropivacaine 0.75% + 300 mcg Buprenorphine is administered for this arm of the interscalene block

Ropivacaine + Clonidine

A mixture of 0.75% ropivacaine with 75 mcg clonidine, total volume 32 cc for interscalene block given pre-operatively

Group Type EXPERIMENTAL

Ropivacaine 0.75% + 75 mcg clonidine

Intervention Type DRUG

Ropivacaine 0.75% + 75 mcg Clonidine is administered for this arm of the interscalene block

Ropivaciane + Dexamethasone

A mixture of 0.75% ropivacaine with and 8 mg dexamethasone, total volume 32 cc for interscalene block given pre-operatively

Group Type EXPERIMENTAL

Ropivacaine 0.75% + 8 mg dexamethasone

Intervention Type DRUG

Ropivacaine 0.75% + 8 mg Dexamethasone is administered for this arm of the interscalene block

Interventions

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Ropivacaine 0.75%

Only ropivacaine 0.75% is administered for this arm of the interscalene block

Intervention Type DRUG

Ropivacaine 0.75% + 300 mcg Buprenorphine

Ropivacaine 0.75% + 300 mcg Buprenorphine is administered for this arm of the interscalene block

Intervention Type DRUG

Ropivacaine 0.75% + 75 mcg clonidine

Ropivacaine 0.75% + 75 mcg Clonidine is administered for this arm of the interscalene block

Intervention Type DRUG

Ropivacaine 0.75% + 8 mg dexamethasone

Ropivacaine 0.75% + 8 mg Dexamethasone is administered for this arm of the interscalene block

Intervention Type DRUG

Other Intervention Names

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Naropin Naropin + Buprenex Naropin + Duraclon Naropin + Decadron

Eligibility Criteria

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Inclusion Criteria

* Patients who have or are:

1. Orthopedics service patients having shoulder surgery
2. ASA(American Society of Anesthesiologists) class I, II, or III.
3. Patients at least 18 years old but less than 71 years old.
4. Patients giving informed consent.
5. Non-Emergency Surgery

Exclusion Criteria

* Patients who have or are:

1. An inability to cooperate during the block placement.
2. Neuropathy of the planned extremity to block
3. Diabetes
4. Documented Kidney Disease
5. Documented Liver Disease
6. A lack of or inability to give informed consent.
7. Currently incarcerated.
8. Pregnant
Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Melinda Seering

OTHER

Sponsor Role lead

Responsible Party

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Melinda Seering

Clinical Assistant Profession, Prinicipal Investigator

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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Melinda Seering, M.D.

Role: PRINCIPAL_INVESTIGATOR

University of Iowa

Locations

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University of Iowa Hospital and Clinics, Ambulatory Surgery Clinic

Iowa City, Iowa, United States

Site Status

Countries

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United States

References

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Provided Documents

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Document Type: Study Protocol and Statistical Analysis Plan

View Document

Other Identifiers

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201304727

Identifier Type: -

Identifier Source: org_study_id

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