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The quadratus lumborum (QL) block is a fascial plane block that has been described to provide analgesia from T7-L3 dermatomes. The investigators aim to evaluate the efficacy of QL blocks in patients undergoing primary total hip arthroplasty (THA).
Investigators will enroll subjects planned for primary THA and allocate them into receiving a QL block with either saline or ropivacaine. Primary outcome will be pain scores over the first 48 hours after surgery.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Intervention Group | Active Comparator | Quadratus lumborum nerve block with 0.25% ropivacaine |
|
| Control Group | Placebo Comparator | Quadratus lumborum nerve block with saline |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Active Comparator | Drug | QL block with 0.25% ropivacaine |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Pain score | Pain scores will be assessed over 48hrs postop using the visual analog score | Up to 48 hrs post op |
| Measure | Description | Time Frame |
|---|---|---|
| Opioid usage | Total morphine-equivalent will be calculated at 0-24hrs and 24-48hrs postop. | Up to 48 hrs post op |
| Time to first stand | The period between the end of surgery and the patient's first successful attempt at standing, with or without the assistance of devices (i.e. walker, cane) or staff assistance. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Pamela Chia, MD | University of California, Los Angeles | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| UCLA Medical Center, Santa Monica | Santa Monica | California | 90404 | United States |
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| ID | Term |
|---|---|
| D010149 | Pain, Postoperative |
| D000377 | Agnosia |
| ID | Term |
|---|---|
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D010146 | Pain |
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| Placebo Comparator |
| Drug |
QL block with saline |
|
| Up to 1 week post surgery |
| Time to first ambulation | Time to first ambulation of 50 feet or more, with or without the help of assist devices (i.e. walker, cane) or staff assistance. | Up to 1 week post surgery |
| Ambulation distance | This data point will be measured in feet and will be determined by the distance ambulated during the patient's first ambulation attempt after surgery, regardless of the length of ambulation (This distance will be counted regardless of whether the patient reaches the 50 feet requirement to be counted as the "time to first ambulation). | Up to 1 week post surgery |
| Length of hospital stay | Number of days in the hospital from postoperative day 0 to discharge | Until discharge from hospital, up to 1 week post surgery |
| Patient satisfaction | Patient satisfaction score will be assessed on day of discharge as measured by a 5-point scale with 1 = terrible, 2 = poor, 3 = satisfactory, 4 = good, and 5 = excellent. | Until day of discharge from the hospital, up to 1 week post surgery |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D010468 | Perceptual Disorders |
| D019954 | Neurobehavioral Manifestations |
| D009422 | Nervous System Diseases |