- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02995291
Reversing the Effects of 0.5% Bupivacaine
Reversing the Effects of 0.5% Bupivacaine: A Randomized Controlled Trial
Clinical trials have shown phentolamine mesylate (PM), brand name OraVerse, to be effective at reducing the amount of time to reversal of local anesthesia with different dental anesthetics. However, to date no study investigated the efficacy of phentolamine mesylate to reverse anesthesia induced with the use of Bupivacaine.
The objective of the proposed research is to conduct a pilot-scale randomized clinical trial evaluating the difference in time required for the return of normal soft-tissue sensation and function in participants who have received 0.5% Bupivacaine HCl, 1:200,000 epinephrine, followed by an injection with either 1) OraVerse (phentolamine mesylate) or 2) sterile physiological water (control).
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Dental procedures often require the use of local anesthesia. The most common local anesthetic used is 2% Lidocaine 1:100,000 epinephrine. This local anesthetic can achieve soft tissue anesthesia for 180-300 minutes and pulpal anesthesia for 60 minutes. Unfortunately, for longer treatments this relatively short duration can lead to the loss of anesthetic effect before the end of the interventions. Time-demanding dental appointments include oral and periodontal surgeries, extensive restorative treatments, and even minor treatments when completed by dental students. Unfortunately, if a short acting anesthetic such as Lidocaine is being used during long lasting procedures, once the patients start feeling pain again, it may be difficult to reestablish deep pulpal anesthesia with a repeated injection due to tachyphylaxis. To avoid this situation long-acting local anesthetics could be selected instead. The only long-acting anesthetic available in dentistry is 0.5% Bupivacaine HCl, 1:200,000 epinephrine. Bupivacaine can produce soft tissue anesthesia for up to 12 hours (commonly 4 to 9 hours) and pulpal anesthesia for up to 7 hours (commonly 1.5 to 3 hours). Unfortunately, Bupivacaine is not often used for non-surgical procedures due to its very long soft tissue anesthesia that outlast treatments by several hours.
The effects of soft tissue anesthesia linger for some time after the administration of long acting local anesthetics such as Bupivacaine. This can lead to discomfort and occasionally injury from lip/tongue biting. Clinical trials have shown phentolamine mesylate (PM), brand name OraVerse, to be effective at reducing the amount of time to reversal of local anesthesia with different dental anesthetics. However, to date no study investigated the efficacy of phentolamine mesylate to reverse anesthesia induced with the use of Bupivacaine.
The objective of the proposed research is to conduct a pilot-scale randomized clinical trial evaluating the difference in time required for the return of normal soft-tissue sensation and function in participants who have received 0.5% Bupivacaine HCl, 1:200,000 epinephrine, followed by an injection with either 1) OraVerse (phentolamine mesylate) or 2) sterile physiological water (control). This will further advance our knowledge of both Bupivacaine and phentolamine mesylate as there are no current studies evaluating reversing the effect of Bupivacaine with PM.
It is hypothesized that phentolamine mesylate will reduce the duration of soft tissue anesthesia by 2.5 hours when compared with a control injection of saline water. It is anticipated that this study will determine the feasibility and sample size needed to conduct a full-scale multi-centre trial.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
Nova Scotia
-
Halifax, Nova Scotia, Canada, B3H 4R2
- Dalhousie University Faculty of Dentistry
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- 18 years of age or older
- capable of providing informed consent
Exclusion Criteria:
- contra-indications for regular dental treatment
- medical history that contraindicates the use of epinephrine
- participant taken an opioid or an opioid like analgesic within 24 hours
- pregnant
Study Plan
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 |
---|---|
Placebo Comparator: Control
1.7ml saline water
|
1.7ml saline water will be injected once after the participants are found to be well anesthetized following an injection of 1.8ml Bupivacaine 0.5% (inferior alveolar nerve block).
The water will be injected at the same site Bupivacaine was injected.
Other Names:
|
Experimental: OraVerse
1.7ml OraVerse
|
1.7ml OraVerse (0.4 mg phentolamine mesylate) will be injected once after the participants are found to be well anesthetized following an injection of 1.8ml Bupivacaine 0.5% (inferior alveolar nerve block).
Oraverse will be injected at the same site Bupivacaine was injected.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Time to reversal of local anesthesia
Time Frame: 8 hours
|
8 hours
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Pierre-Luc Michaud, DMD, MSc, FRCDC, Dalhousie University
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2016-4014
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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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