Working…
ClinicalTrials.gov
ClinicalTrials.gov Menu

Effects of Catheter Location Relative to Femoral Artery on Postoperative Analgesia for Continuous Adductor Canal 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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT03650504
Recruitment Status : Not yet recruiting
First Posted : August 28, 2018
Last Update Posted : August 28, 2018
Sponsor:
Collaborators:
Rodney Gabriel MD
Matthew Swisher MD
Information provided by (Responsible Party):
John J. Finneran IV, MD, University of California, San Diego

Brief Summary:
Adductor canal (AC) nerve block is a commonly used modality for postoperative pain control after total knee arthroplasty (TKA). When the adductor canal is viewed by ultrasound, the femoral artery and femoral vein can easily be identified, however, the nerve that is to be blocked is often not visible. For this reason, the femoral artery is used as a landmark for the block. There currently are no studies examining the optimal placement of the nerve block catheter relative to the femoral artery in the canal. The goal of this study will be to examine the relationship between nerve catheter tip location relative to femoral artery within the adductor canal for continuous AC nerve blocks. The investigators specifically will compare postoperative pain as well as incidence of vascular puncture during the procedure and time to complete the procedure for two different catheter locations.

Condition or disease Intervention/treatment Phase
Osteoarthritis, Knee Procedure: Above Artery Catheter Placement Procedure: Between Artery and Vein Placement Not Applicable

  Hide Detailed Description

Detailed Description:

This will be a single-center, randomized, controlled investigation. Consenting adults undergoing unilateral total knee arthroplasty with a planned adductor canal perineural catheter will be offered enrollment. Study inclusion will be proposed to eligible patients prior to surgery. If a patient desires study participation, written, informed consent will be obtained using a current UCSD IRB-approved ICF. Selection for inclusion will not be based on gender, race, or socioeconomic status.

Following written, informed consent, we will record baseline anthropomorphic information. All subjects will have a peripheral intravenous (IV) catheter inserted, standard noninvasive monitors applied, supplemental oxygen administered via a nasal cannula or face mask, and positioned supine. Midazolam and fentanyl will be titrated for patient comfort, while ensuring that patients remain responsive to verbal cues. The ultrasound will be placed to visualize the short axis (cross-section) of the adductor canal. If both sites (above femoral artery versus between femoral artery and vein) are acceptable for catheter insertion, the subject will be randomized using a computer-generated list (blocks of 8) to one of two treatment groups in a 1:1 ratio using sealed, opaque, consecutively numbered envelopes: (1) above femoral artery vs (2) between femoral artery and vein.

Catheter insertion will adhere to current UCSD standard-of-care. The only difference for subjects participating in the study will be that the specific catheter insertion location will be determined randomly, instead of the physician simply choosing him/herself. All catheters will be placed by a regional anesthesia fellow under the direct supervision and guidance of a regional anesthesia attending. All catheters will be placed using standard UCSD perineural catheter techniques.

The area of insertion will be cleaned with chlorhexidine gluconate and isopropyl alcohol, and a clear, sterile, fenestrated drape applied. The ultrasound probe will be placed to visualize the short-axis (cross-section) of the target nerve(s). A 17-gauge needle (FlexTip, Teleflex Medical, Triangle Research Park, NC, USA) will be used to place all perineural catheters. The catheter-placement needle will be inserted through the skin wheal, advanced in-plane beneath the US transducer and directed to the target nerve as described below:

"Above-the-artery": The needle will be directed below the nerve to about five o'clock of the artery. The needle will then be advanced to twelve o'clock of the artery while opening the adductor canal space with saline until adequate opening of the canal is realized. At that point, the catheter is placed above the artery.

"Between-the-artery-and-vein": The needle will be directed above the nerve and placed at one o'clock of the artery. Then the needle will be positioned at about six o'clock of the artery and advanced between the femoral artery and vein with simultaneous pressure until the adductor canal opens appropriately. The perineural catheter will be placed between the artery and vein.

Saline (10 mL) will be administered via the needle to dilate the space where the catheter is to be inserted. A flexible non-stimulating perineural catheter will be inserted 3-5 cm past the needle tip; and the needle withdrawn over the catheter. A 30 mL bolus of lidocaine 2% with 1:400,000 of epinephrine will then be administered through the catheter.

Intraoperatively, patients may receive a general and/or neuraxial anesthetic that would be determined by the intraoperative anesthesia provider. Additional boluses of 10 mL 2% lidocaine with epinephrine may be given, if needed, via the perineural catheter.

Perineural infusion: An infusion pump will be attached to each subject's perineural catheter. The pump will provide ropivacaine 0.2% at 6 mL/h and a 4 mL patient-controlled bolus with a 30-minute lockout.

Data collection: All data collection will be through standard UCSD nursing/therapy electronic medical record notes for the day following surgery.

Primary endpoint: The primary endpoint will be the average pain on post operative day 1 following surgery as measured on a numeric rating scale (0-10, 0=no pain, 10=worst imaginable pain) during the time periods of 08:00-24:00.

Secondary endpoints: Other data collected will include: (1) total procedure duration (from needle-in to needle-out), (2) total opioid consumption on postoperative day 1, (3) worst pain score measured on a numeric rating scale, (4) number of intra-procedural vascular punctures, (5) total local anesthetic infused in 24 hours following surgery, and (6) distance ambulated on postoperative day 1 with first session of physical therapy.

Sample size estimates:

The primary analysis will utilize the Wilcoxon Rank Sum test. The mean postoperative day 1 pain scores following adductor canal catheter placement for total knee arthroplasty is 4.12 with standard deviation = 1.74.2 The null hypothesis is that the "above-the-artery" group is inferior to the "between-the-artery-and-vein" group. The alternative hypothesis is that the "above-the-artery" group in non-inferior to the "between-the-artery-and-vein" group. Assuming a non-inferiority limit of 1.5, power = 0.80, two-side alpha = 0.05, we will require 17 patients in each group (total = 34). To account for dropouts, we plan to recruit 20 patients in each group, totaling 40 patients all together.


Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 40 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Effects of Catheter Location Relative to Femoral Artery on Postoperative Analgesia for Continuous Adductor Canal Blocks
Estimated Study Start Date : August 24, 2018
Estimated Primary Completion Date : July 30, 2019
Estimated Study Completion Date : July 30, 2019

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Above Artery Group Procedure: Above Artery Catheter Placement
Nerve catheter placed between superficial femoral artery and sartorial muscle

Active Comparator: Between Artery and Vein Group Procedure: Between Artery and Vein Placement
Nerve catheter placed between superficial femoral artery and femoral vein




Primary Outcome Measures :
  1. AVERAGE PAIN [ Time Frame: 08:00AM to 24:00 on the first day following surgery ]
    Average pain on post operative day 1 following surgery as measured on a numeric rating scale (0-10, 0=no pain, 10=worst imaginable pain).


Secondary Outcome Measures :
  1. Procedure duration [ Time Frame: Prior to surgery ]
  2. Opioid consumption [ Time Frame: Postoperative days zero and one ]
  3. Distance Ambulated [ Time Frame: Physical Therapy sessions on postoperative day one ]
  4. Worst pain score (NRS 0-10 reported by patient) [ Time Frame: Postoperative day , entire day ]
  5. Number of vascular pictures during placement [ Time Frame: During the catheter placement procedure ]
  6. Intravascular injection assessed by heart rate response to epinephrine in injection [ Time Frame: During the catheter placement procedure ]
  7. Total local anesthetic infused on first postoperative day [ Time Frame: Postoperative days zero and one ]


Information from the National Library of Medicine

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, Learn About Clinical Studies.


Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients undergoing unilateral total knee arthroplasty at UC San Diego with planned placement of an adductor canal catheter at request of surgeon

Exclusion Criteria:

  • history of allergic reaction to lidocaine or ropivacaine
  • history of peripheral neuropathy, neuropathic pain, or chronic pain requiring opioid medications.
  • Pregnant females and prisoners

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 ClinicalTrials.gov identifier (NCT number): NCT03650504


Contacts
Layout table for location contacts
Contact: John J Finneran, MD 4083073004 jfinneran@ucsd.edu

Sponsors and Collaborators
University of California, San Diego
Rodney Gabriel MD
Matthew Swisher MD

Layout table for additonal information
Responsible Party: John J. Finneran IV, MD, Assistant Clinical Professor, University of California, San Diego
ClinicalTrials.gov Identifier: NCT03650504     History of Changes
Other Study ID Numbers: 180718
First Posted: August 28, 2018    Key Record Dates
Last Update Posted: August 28, 2018
Last Verified: August 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
Layout table for MeSH terms
Osteoarthritis, Knee
Osteoarthritis
Arthritis
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases