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This is a research study to determine if the effects of continuous peripheral nerve blocks are influenced by the distance of insertion past the needle tip of the perineural catheter.
Specific Aim: Research study to determine the relationships between perineural catheter insertion distance and subsequent continuous peripheral nerve block effects.
Hypothesis: during ultrasound-guided perineural catheter placement, inserting the catheter 0-1cm past the needle tip is associated with decreased postoperative pain compared with inserting the catheter 5-6cm past the needle tip.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Catheter 0-1cm past needle tip | Active Comparator | Patients will be receiving a sciatic (popliteal), femoral, or interscalene nerve block and will be randomized to having the catheter placed 0-1cm past the needle tip. The patient will be called the following day by research staff to assess their post-surgical pain. |
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| Catheter placed 5-6cm past needle tip | Active Comparator | Patients will be receiving a sciatic (popliteal), femoral, or interscalene nerve block and will be randomized to having the catheter placed 5-6cm past the needle tip. Patients will be called the following day by research staff to assess their post-surgical pain. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Sciatic catheter left 0-1cm past needle tip vs. 5-6cm past needle tip | Procedure | Patients undergoing orthopedic surgery who are getting a perineural catheter will be randomized to one of two groups: catheter tip placed 0-1cm past needle tip or catheter tip placed 5-6cm past needle tip. Patients will be called by research staff the day following surgery to assess their post-surgical pain using a numeric rating scale. |
| Measure | Description | Time Frame |
|---|---|---|
| Average pain in the three hours previous to a phone call the day following surgery as measured on a numeric rating scale (0-10, 0=no pain, 10=worst imaginable pain). | Day 1 after surgery, 3 hours prior to phone call |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Brian M Ilfeld, M.D., M.S. | University of California, San Diego | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| UCSD Medical Center | San Diego | California | 92103 | United States |
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| ID | Term |
|---|---|
| D010149 | Pain, Postoperative |
| D010146 | Pain |
| ID | Term |
|---|---|
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D009461 | Neurologic Manifestations |
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| D012816 | Signs and Symptoms |