This site became the new ClinicalTrials.gov on June 19th. Learn more.
Show more
ClinicalTrials.gov Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...
ClinicalTrials.gov Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more...
ClinicalTrials.gov Menu
Give us feedback

Comparison of 3 Techniques for Ultrasound-guided Femoral Nerve Catheter Insertion

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Ehab Farag, Outcomes Research Consortium
ClinicalTrials.gov Identifier:
NCT00927368
First received: June 24, 2009
Last updated: April 6, 2017
Last verified: April 2017
  Purpose
This is a randomized study which will compare three femoral nerve catheter insertion techniques. Subjects will be randomized into one of thee groups, Group 1: ultrasound guided femoral nerve catheter using a stimulation needle and stimulating catheter, .Group 2: ultrasound guided femoral nerve catheter using a stimulation needle, but non-stimulating catheter, or Group 3: ultrasound guided femoral nerve block without stimulation.

Condition Intervention
Total Knee Replacement Surgery Procedure: ultrasound guidance alone Procedure: ultrasound guidance and needle stimulation Procedure: ultrasound guidance and catheter stimulation

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Investigator)
Primary Purpose: Supportive Care
Official Title: Comparison Between Ultrasound Guided Femoral Nerve Block Versus Ultrasound Guided Femoral Nerve Block With the Use of Peripheral Nerve Stimulation for Patients Undergoing Total Knee Replacement.

Resource links provided by NLM:


Further study details as provided by Ehab Farag, Outcomes Research Consortium:

Primary Outcome Measures:
  • Time Weighted Average Verbal Response Scale Pain Score [ Time Frame: 48 hours after surgery ]

    Time weighted average of verbal response scale (VRS) pain score on a scale from 0 (no pain) to 10 (worst pain imaginable).

    Verbal Response Scale (VRS) pain scores after surgery - which ranged from 0 (no pain) to 10 (maximum intolerable pain) - were assessed every 30 minutes in the recovery area and every 4 hours thereafter up to 48 hours postoperatively. These individual measurements were averaged for each patient using a time-weighted formula. (For a given patient, the observed VRS pain score profile as a function of time was linearly interpolated and integrated using the trapezoidal rule; then, the time-weighted average was calculated as the value of this integral divided by the total monitoring time of 48 hours.).


  • Opioid Consumption [ Time Frame: 48 hours after surgery ]
    cumulative opioid consumption, where all opioids were converted to IV morphine equivalents


Secondary Outcome Measures:
  • Block Performance Time [ Time Frame: time elapsed from beginning the block to catheter placement ]
    Block performance time, defined as the time from block start until catheter placement.

  • Incremental Cost of Femoral Nerve Blocks [ Time Frame: postoperative period when block is used ]
    The incremental cost between strategies was calculated as the additional cost of one strategy to the next less costly strategy. There was no variance in the price because these prices were contracted with the hospital. The contracted price for a hospital does not change or fluctuate.


Enrollment: 453
Study Start Date: August 2009
Study Completion Date: December 2012
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Ultrasound guidance alone
The Tuohy needle was inserted in out-plane approach. Needle placement was considered adequate when the tip was visualized beneath the fascia iliaca; the catheter was then introduced 5 cm beyond the needle tip. Electrical stimulation was not used.
Procedure: ultrasound guidance alone
The Tuohy needle was inserted in out-plane approach. Needle placement was considered adequate when the tip was visualized beneath the fascia iliaca; the catheter was then introduced 5 cm beyond the needle tip. Electrical stimulation was not used.
Active Comparator: Ultrasound guidance needle stimulation
For the ultrasound guidance and needle stimulation arm, the Tuohy needle was positioned with the tip beneath the fascia iliaca under ultrasound guidance. The needle tip was then adjusted as necessary to obtain a quadriceps muscle response with a stimulating current ≤0.5 mA (2 Hz, pulse width 0.1 msec). Subsequently, the catheter was threaded 5 cm beyond the needle tip without additional electrical stimulation
Procedure: ultrasound guidance and needle stimulation
For the ultrasound guidance and needle stimulation group, the Tuohy needle was positioned with the tip beneath the fascia iliaca under ultrasound guidance. The needle tip was then adjusted as necessary to obtain a quadriceps muscle response with a stimulating current ≤0.5 mA (2 Hz, pulse width 0.1 msec). Subsequently, the catheter was threaded 5 cm beyond the needle tip without additional electrical stimulation.
Active Comparator: Ultrasound guidance+catheter stimulation
For the ultrasound guidance and catheter stimulation group, the Tuohy needle was positioned with the tip beneath the fascia iliaca under ultrasound guidance. The needle tip was then adjusted as necessary to obtain a quadriceps muscle response with a stimulating current ≤0.5 mA. At that point, the peripheral nerve stimulator was then disconnected from the stimulating needle and connected to the proximal end of the catheter. The catheter was then advanced 5 cm past the needle tip. If the motor response disappeared during catheter advancement, the catheter was withdrawn slightly until the response returned. Needle orientation and catheter advancement were adjusted as necessary to elicit quadriceps contractions via the catheter with a stimulating current ≤0.5 mA.
Procedure: ultrasound guidance and catheter stimulation
The Tuohy needle was positioned with the tip beneath the fascia iliaca under ultrasound guidance. The needle tip was then adjusted as necessary to obtain a quadriceps muscle response with a stimulating current ≤0.5 mA. At that point, the peripheral nerve stimulator was then disconnected from the stimulating needle and connected to the proximal end of the catheter. The catheter was then advanced 5 cm past the needle tip. If the motor response disappeared during catheter advancement, the catheter was withdrawn slightly until the response returned. Needle orientation and catheter advancement were adjusted as necessary to elicit quadriceps contractions via the catheter with a stimulating current ≤0.5 mA.

Detailed Description:

This is a randomized study which will compare three femoral nerve catheter insertion techniques. Subjects will be randomized into one of thee groups, Group 1: ultrasound guided femoral nerve catheter using a stimulation needle and stimulating catheter, .Group 2: ultrasound guided femoral nerve catheter using a stimulation needle, but non-stimulating catheter, or Group 3: ultrasound guided femoral nerve block without stimulation.

  • Pain Scores after surgery with be measured using the VAS (Visual Analogue Scale). Subjects will be asked to rate their pain on a scale of 1-10.
  • Block Performance time is the time from starting the block (after prepping and draping) until catheter is placed.
  • Opioid requirements will be measured as the total amount of opioids (converted to morphine sulfate equivalents) used both during surgery, and during the first 48 hours after surgery.
  • Block failure rate will be calculated as the rate of cases that requires repeating the block after surgery.
  Eligibility

Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • 18 to 80 years old at time of surgery.
  • Male or female patients undergoing total knee replacement under either general or neuraxial anesthesia (spinal or epidural). Intraoperative, patients will receive spinal anesthetics with 15 mg bupivacaine and 25mcg of fentanyl intrathecally.

Exclusion Criteria:

  • Current or recent drug abuse (within past 6 months).
  • Pregnancy.
  • Patient refuses regional analgesia.
  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 ClinicalTrials.gov identifier: NCT00927368

Locations
United States, Ohio
Cleveland Clinic
Cleveland, Ohio, United States, 44195
Sponsors and Collaborators
The Cleveland Clinic
Investigators
Principal Investigator: Ehab Farag, M.D. The Cleveland Clinic
Study Chair: Daniel I Sessler, M.D. The Cleveland Clinic
  More Information

Responsible Party: Ehab Farag, Principal Investigator, Outcomes Research Consortium
ClinicalTrials.gov Identifier: NCT00927368     History of Changes
Other Study ID Numbers: 09-340
Study First Received: June 24, 2009
Results First Received: June 27, 2016
Last Updated: April 6, 2017

Keywords provided by Ehab Farag, Outcomes Research Consortium:
TKA
total knee replacement

ClinicalTrials.gov processed this record on August 17, 2017