Osteoarthritis of hip
Conditions
Interventions
This is a clinical trial with an up-and-down adaptive design to predict the minimum effective volume in 50% and 95% of the patients to obtain effective analgesia with the performance of Pericapsular N
Fujifilm SonoSite Inc). The blocks will be performed with a sterile technique, in a patient positioned in the supine position. Initially, a blockade of joint branches of the obturator nerve will be pe
Sponsors
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
Eligibility
Inclusion criteria
Inclusion criteria: Patients with chronic hip pain, defined as pain for more than 3 months, and with indication for hip joint arthroplasty due to osteoarthritis.
Exclusion criteria
Exclusion criteria: Patients allergic to local anesthetics or the contrast agent used. Patients addicted to alcohol or illicit drugs. Weight 40 kg/m2. Pregnant women. Patients with previous sensory alterations in dermatome of femoral or obturator nerves. Patients with cognitive impairment who are incapable of understanding the study and signing the informed consent form. Patients with skin infection at the puncture site
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Analgesia success, defined as a 50% reduction in baseline pain measured by a visual analogue scale during a hip flexion test 30 minutes after local anesthetic injection. | — |
Secondary
| Measure | Time frame |
|---|---|
| Needle position and dispersion of the solution will be evaluated using radioscopy in anteroposterior and lateral view of the hip.;Timed “up and go” test (TUG) will be performed before the blocks and 30 minutes after.;Scour test will be performed before the blocks and 30 minutes after;Quadriceps strength will be evaluated immediately before and 30 minutes after the blockade, with the patient in a sitting position and with the knee flexed at 90º, the patient will be asked to extend the knee first against active resistance performed by the evaluator. Quadriceps strength will be graded according to a simple 3-point scale, where normal strength = 0 (total resistance); mild weakness = 1 (moderate resistance); and severe weakness = 2 (weak resistance).;Incidence of adverse events | — |
Countries
Brazil
Contacts
Public ContactHazem Ashmawi
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
Outcome results
None listed