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Duration of Analgesia After Popliteal Fossa Nerve Blockade: Effects of Dexamethasone and Buprenorphine

Information source: Hospital for Special Surgery, New York
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Patients Undergoing Ankle Surgery

Intervention: A. Control Nerve Block. IV Dexamethasone (4 mg). (Drug); B. Nerve Block with Dexamethasone (4 mg). IV saline. (Drug); C. Control Nerve Block. IV Dexamethasone (4 mg). IV Buprenorphine (0.3 mg) (Drug); D. Nerve Block with Buprenorphine (0.3 mg). IV Dexamethasone (4 mg). (Drug); E. Nerve Block with Dexamethasone (4 mg) / block Buprenorphine (0.3 mg). (Drug)

Phase: N/A

Status: Completed

Sponsored by: Hospital for Special Surgery, New York


Patients scheduled to go home after ankle surgery at HSS typically receive a sciatic nerve block in the popliteal fossa and oral analgesic tablets (such as Percocet). Popliteal fossa nerve blockade has reduced pain for these patients (YaDeau et al, Anesth Analg 2008;106: 1916-20), but unfortunately the patients still often experience moderate to severe pain after the block wears off. The investigators wish to study two additives that may prolong the period of analgesia provided by the nerve block. The additives will be studied in the context of a standardized postoperative multimodal analgesic pathway. Primary outcome: Does adding dexamethasone and / or buprenorphine prolong the analgesia provided by a popliteal fossa nerve block? Secondary outcomes: Does adding dexamethasone and/or buprenorphine to a popliteal fossa nerve block improve: Pain scores? Quality of recovery? Satisfaction? Does adding dexamethasone and/or buprenorphine to a popliteal fossa nerve reduce: Opioid consumption? Opioid-related symptoms? Sleep disturbance?

Clinical Details

Official title: Duration of Analgesia After Popliteal Fossa Nerve Blockade: Effects of Dexamethasone and Buprenorphine

Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Primary outcome: Time it takes for nerve block to wear off


Minimum age: 18 Years. Maximum age: 75 Years. Gender(s): Both.


Inclusion Criteria: 1. Patients of Dr Levine or Dr Roberts. 2. Scheduled for discharge from HSS after foot or ankle surgery. 3. A single-injection popliteal fossa nerve block is judged appropriate.

4. Surgery confined to foot and ankle (no iliac crest bone graft planned - iliac

aspirate is not an exclusion criterion). 5. Patients aged 18-75 years. Exclusion Criteria:

- Surgery that will cause pain at sites outside the distal lower extremity (e. g. iliac

crest bone graft).

- Bilateral surgery

- Chronic pain (defined as regular use of opioid analgesics for > 3 months).

- Chronic use of steroids (defined as regular use of steroids for > 3 months).

- Contraindication to performance of the popliteal fossa nerve block with 30 cc 0. 25%

bupivacaine with clonidine (e. g. alleged bupivacaine sensitivity, low body weight, clonidine allergy, etc.).

- Contraindications to dexamethasone or buprenorphine (e. g. allergy, Insulin Dependent

Diabetes Mellitus, etc.)

- Inability of the patient to describe postoperative pain (e. g. psychiatric disorder,


- Non-English speaking patients (the questionnaire is in English, and translations

would have to be separately validated)

Locations and Contacts

Hospital for Special Surgery, New York, New York 10021, United States
Additional Information

Starting date: October 2010
Last updated: July 2, 2012

Page last updated: August 23, 2015

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