A Prospective Analysis of Preoperative Fascia Iliaca Block for Hip Arthroscopy

Study Overview
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Brief Summary
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Patients undergoing arthroscopic hip surgery have been shown to have significant post-operative pain that may delay discharge, recovery, and early mobilisation. A pre-operative regional anesthesia technique, the fascia iliaca block may be an effective method for acute post-operative analgesia. This is a prospective, randomized controlled study of the preoperative fascia iliaca block for patients undergoing hip arthroscopy. The enrolled patients will be randomized to receive either a fascia iliaca block with the local anesthetic ropivacaine or to have a sham block. All patients will receive a general anesthetic for the hip arthroscopy.

Detailed Description
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Arthroscopic hip surgery is used to diagnose and treat interior joint pathology. Although minimally invasive in nature, patients have considerable amount of pain postoperatively, leading to prolonged recovery room stay and increased opiate requirements. The investigators performed a retrospective chart review in patients who underwent hip arthroscopy at the UCSF Orthopedic Institute. 89% of the patients had pain immediate after surgery requiring opioid therapy. Regional anesthesia has previously been shown to reduce discomfort after hip arthroscopy. However, there is currently no safe, well-established ultrasound guided regional anesthesia technique for arthroscopic hip surgery. The fascia iliaca block has shown to decrease acute pain related with hip fractures, as well as pain related with knee arthroplasty. The ultrasound guided fascia iliaca block is easy to perform and has an excellent safety record. The investigators believe that the ultrasound guided fascia iliaca block improves pain control in patients undergoing arthroscopic hip surgery. Patients will receive a sham block group or a fascia iliaca block, performed in the preoperative area. Pain scores and measurement of quadriceps strength will be assessed preoperatively and postoperatively. The patient will receive a pain diary consisting of pain scores, pain medication consumption, and a brief pain inventory. Within 48 hours postoperatively, an anesthesiologist will call the patient and review the patient's pain scores, pain medication consumption and brief pain inventory.

Official Title
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A Prospective Analysis of Preoperative Fascia Iliaca Block for Hip Arthroscopy

Conditions
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Muscle Weakness | Patient, Pain

Intervention / Treatment
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* Drug: Peripheral Nerve Block
* Drug: Sham Block


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age at least 18 years old American Society of Anesthesia physical classification I - III, scheduled for arthroscopic hip surgery Exclusion Criteria: Age younger than 18 years old Non-English speaking Contraindicated for regional nerve block (such as, but not limited to: coagulopathy, infection at site, allergy to local anesthetic) Preexisting neurologic deficits of operative limb Need for postoperative nerve function test Inability to consent due to cognitive dysfunction Chronic pain Patient refusal.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 99 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: Sham<br> | Drug: Sham Block<br>* Sham Block by saline injection<br>|
| Active Comparator: Fascia Iliaca Compartment Block<br> | Drug: Peripheral Nerve Block<br>* Regional Anesthesia by Local Anesthetic Injection<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Numeric Pain Score | highest reported numeric score 0-10 in Post Anesthesia Care Unit (PACU) (primary endpoint) The NRS score is used to rate pain from 0 (no pain) to 10 (worst pain imaginable) | within one hour after surgery | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Leg Strength at Discharge From Ambulatory Center, Surgical Leg | measurement of quadriceps strength (Force) using a dynamometer | 2 hours after surgery | 
| Patient Satisfaction | patient questionaire, patients are contacted 48 h after surgery patient satisfaction is assessed using a questionnaire, applying a scale from 0 to 10, with 0 indicating not satisfied at all and 10 indicating very satisfied | 48 hours |