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Research study to determine the relationship between perineural catheter tip location relative to the sciatic nerve bifurcation and postoperative analgesia for continuous popliteal nerve blocks.
Hypothesis: During a continuous popliteal nerve block, postoperative analgesia will be improved with the perineural catheter tip at the level of the sciatic nerve bifurcation compared to when the catheter tip is 5 cm cephalad/proximal to the bifurcation.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| At Bifurcation | Active Comparator | Patients randomized to this group will receive a sciatic nerve block placed at the bifurcaton of the sciatic nerve and outcome measures will be tested. |
|
| 5cm Above Bifurcation | Active Comparator | Patients randomized to this group will receive a sciatic nerve block placed 5cm above the bifurcaton of the sciatic nerve and outcome measures will be tested. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Catheter Placed At Bifurcation | Procedure | Patients randomized to this group will receive a sciatic nerve block placed at the bifurcaton of the sciatic nerve and outcome measures will be tested. |
| Measure | Description | Time Frame |
|---|---|---|
| Average Pain | The 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). | 1 Day following surgery |
| Measure | Description | Time Frame |
|---|---|---|
| Analgesic Use | Total oral opioid use since surgery and total IV analgesics if any. | 1 day following surgery |
| Sleep Disturbances | Total number of times patient woke due to pain the night following surgery. |
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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 Centers (Hillcrest and Thornton) | San Diego | California | 92103 | United States |
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| Catheter Placed 5cm Above Bifurcation | Procedure | Patients randomized to this group will receive a sciatic nerve block placed 5cm above the bifurcaton of the sciatic nerve and outcome measures will be tested. |
|
| 1 day following surgery |
| Infusion Side Effects | Numbness of foot and toes on a 0-10 scale where 0=no numbness and 10=complete numbness. | 1 day following surgery |
| Satisfaction of pain control | Patients will give an answer on a 0-10 scale where 0=completely unsatisfied wiht pain control and 10=completely satisfied with pain control. | 1 day following surgery |
| ID | Term |
|---|---|
| D010149 | Pain, Postoperative |
| ID | Term |
|---|---|
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D010146 | Pain |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
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