Use of Ultrasound in Lower Extremity Blocks.

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00221910
Recruitment Status : Completed
First Posted : September 22, 2005
Last Update Posted : December 5, 2008
University of Toronto
Information provided by:
University Health Network, Toronto

Brief Summary:

Nerve "freezing" injections of the leg are very useful in providing anesthesia and pain relief for knee and ankle surgery. However, current nerve "freezing" techniques are "blind". As a result, they are not always successful and may cause complications, albeit infrequent.

The objective of the current study is to determine any advantage in performing these "freezing" injections under direct ultrasound guidance, to "visualize" the nerves. We feel that by developing this technique, it will allow us to perform these procedures with greater success and fewer complications.

Condition or disease Intervention/treatment Phase
Regional Anesthesia Procedure: Ultrasound Not Applicable

Detailed Description:
This study is a randomised controlled trial. Its objective is to compare results and complications between two techniques of nerve localisation for nerve blocks of the lower limb. We have developed a real-time, image guided approach to nerve blocks of the lower extremities in three locations: the femoral nerve in the groin and the sciatic nerve in the buttock and/or popliteal fossa. We have used ultrasound imaging to locate and asess the nerves of the lower extremities and to use it as a real-time guidance for performance of lower extremity blocks in patients undergoing orthopaedic procedures. The results of our previous study will be presented as a case series reporting anatomical appearance of the nerves studied, time for block performance and success rates. In this study we aim to compare these parambeters between standard and ultrasound techniques of lower extremity block, to show any advantage.

Study Type : Interventional  (Clinical Trial)
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single
Official Title: Does Ultrasound Guidance Improve the Success of Sciatic Nerve Block at the Popliteal Fossa? A Prospective, Randomized, Controlled Trial.
Study Start Date : February 2003
Actual Study Completion Date : March 2005

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Ultrasound

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • English-speaking
  • ASA physical status I-III
  • 18-85 years of age, inclusive
  • 50-110 kg, inclusive
  • 150 cm of height or grater
  • Scheduled for elective foot or ankle surgery

Exclusion Criteria:

  • Contraindications to sciatic nerve block (e.g., allergy to local anesthetics, coagulopathy, malignancy or infection in the popliteal area)
  • Significant peripheral neuropathy or neurologic disorder affecting the lower extremity
  • Pregnancy
  • Contraindications to, allergies to, and/or past adverse reactions to local anesthetics
  • History of alcohol or drug dependency/abuse

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00221910

Canada, Ontario
University Health Network
Toronto, Ontario, Canada, M5T2S8
Sponsors and Collaborators
University Health Network, Toronto
University of Toronto
Principal Investigator: Anahi Perlas, MD University Health Network, Toronto Identifier: NCT00221910     History of Changes
Other Study ID Numbers: UHN02-0771-B
First Posted: September 22, 2005    Key Record Dates
Last Update Posted: December 5, 2008
Last Verified: March 2005