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Vibration-Assisted Anaesthesia

This study has been completed.
Information provided by:
University of British Columbia Identifier:
First received: November 18, 2008
Last updated: April 2, 2009
Last verified: April 2009
Aim of study is to investigate whether a small, non-invasive vibrating device applied to the forehead during local anaesthetic administration reduces the pain of the injection.

Condition Intervention Phase
Procedure: Vibration-assisted anaesthesia
Procedure: Switched-off vibrating device
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Vibration-Assisted Anaesthesia: A Randomised Controlled Trial to Investigate Whether Vibration Reduces the Pain of Anaesthetic Injection in Eyelid Surgery

Resource links provided by NLM:

Further study details as provided by University of British Columbia:

Primary Outcome Measures:
  • Patients' verbal pain scores will be elicited and documented immediately by the oculoplastic fellow. [ Time Frame: Immediately ]

Estimated Enrollment: 80
Study Start Date: October 2008
Study Completion Date: April 2009
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
Group receiving vibration-assisted anaesthesia
Procedure: Vibration-assisted anaesthesia

All anaesthetic injections will consist of xylocaine 1% with 1:100,000 adrenaline and will be administered through a short 30 Gauge needle at a constant slow speed at multiple (6-7) sites along the upper lid by a single oculoplastic consultant.

The vibration device and placebo will be operated by a single oculoplastics fellow. The vibrating device / placebo will be placed on the middle of the forehead 1 cm above the mid-brow point 1 second before the anaesthetic injection is commenced. It will be lifted off the skin every time the injection needle exits the skin and it will be replaced on the same point 1 second before the needle reenters the skin at a new injection site.

Placebo Comparator: 2
Group receiving switched-off vibrating device
Procedure: Switched-off vibrating device
The placebo consists of a switched-off vibrating device applied to the test site and a second identical switched-on vibrating device held close (but not touching) the first, which will therefore make the same sound. Care will be taken to ensure that the devices are out of the participants' view. The test and placebo will be randomly assigned to either the first or second eyelid; the right eyelid will be injected first in all patients, as is our routine practice.

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Ages Eligible for Study:   16 Years and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Adult patients (> 16 years) undergoing bilateral upper eyelid surgery under local anaesthetic who have given fully informed consent to be in the trial

Exclusion Criteria:

  • Age less than 16 years
  • Previous upper eyelid surgery
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00793988

Canada, British Columbia
Eye Care Centre (operating rooms)
Vancouver, British Columbia, Canada, V5Z 3N9
Sponsors and Collaborators
University of British Columbia
Principal Investigator: Peter Dolman, MD University of British Columbia
  More Information

Responsible Party: Peter Dolman MD, University of British Columbia Identifier: NCT00793988     History of Changes
Other Study ID Numbers: H08-02244
Study First Received: November 18, 2008
Last Updated: April 2, 2009

Keywords provided by University of British Columbia:
local anaesthesia
ptosis surgery
Upper eyelid surgery
dermatochalasis +/- blepharoptosis

Additional relevant MeSH terms:
Cutis Laxa
Eyelid Diseases
Eye Diseases
Skin Diseases, Genetic
Genetic Diseases, Inborn
Connective Tissue Diseases
Skin Diseases
Central Nervous System Depressants
Physiological Effects of Drugs processed this record on April 25, 2017