Embolization for the Treatment of Pain Secondary to Adhesive Capsulitis

Study Overview
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Brief Summary
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This study is to test a new treatment method, arterial embolization of the shoulder (AES), to reduce the severity of pain and improve range of motion (ROM), and to see if it can be performed safely.

Detailed Description
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Purpose: The primary aims of this study are to determine if arterial embolization of the shoulder will reduce the severity of pain as well improve Range of Motion (ROM) caused by adhesive capsulitis and if it can be performed safely. The secondary aim is to determine if AES can result in the decreased necessity for ongoing conservative therapies, such as medication therapy and joint injections. Participants: Twenty patients with adhesive capsulitis, resulting in shoulder pain that is refractory to conservative therapies, who are not planning to undergo surgery within 6 months. Procedures (methods): This will be an open label 24-month pilot study with a small population undergoing AES to determine safety and efficacy. Clinical procedures and evaluations will consist of a preoperative screening assessment to determine if the potential study subject meets the inclusion and exclusion criteria, enrollment, surgical procedure for arterial embolization of the shoulder, and follow-up visits at 24 hours, 1, 3 & 6 months. An MRI will be performed at the 1-month visit to detect a change in capsular vascularity and to exclude complication.

Official Title
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Embolization for the Treatment of Pain Secondary to Adhesive Capsulitis

Conditions
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Frozen Shoulder, Adhesive Capsulitis

Intervention / Treatment
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* Device: Arterial Embolization of the Shoulder


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: moderate to severe shoulder pain (VAS greater than 40mm), and diagnosis of adhesive capsulitis, and age > 21, and pain refractory to at least 30 days of conservative therapy (pain medications, physical therapy, etc.) Exclusion Criteria: current local infection, or life expectancy less than 6 months, or known advanced atherosclerosis, or rheumatoid or infectious arthritis, or prior shoulder replacement surgery, or uncorrectable coagulopathy as defined by INR > 2.5 or platelets < 30,000, or iodine allergy resulting in anaphylaxis, or renal dysfunction as defined by GRF of < 45, or contraindication for magnetic resonance imaging, or known complete full thickness tear of rotator cuff, or currently pregnant

Ages Eligible for Study
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Minimum Age: 21 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
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Arterial Embolization of the Shoulder (AES)<br>Patients in this study will receive the arterial embolization of the shoulder (AES) procedure. The primary aims will be to determine if arterial embolization of the shoulder (AES) will reduce pain and improve range of motion (ROM) caused by adhesive capsulitis. | Device: Arterial Embolization of the Shoulder<br>* Arterial Embolization of the Shoulder (AES) is a new procedure that is being used to reduce pain and improve range of motion (ROM) caused by adhesive capsulitis. Embolization is a procedure where physicians intentionally block the blood vessels to specific areas of the body to prevent blood flow to that region. By doing this, the decrease in blood flow will decrease the size of the area of interest. In this case, the goal is to decrease the size of inflammatory tissue around the shoulder, resulting in improvement of pain, stiffness and from adhesive capsulitis.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Patient Pain | The pain intensity is assessed using a visual analogue scale (VAS), which is a horizontal line 100 mm in length. Subjects mark the VAS with a single vertical line to indicate their current pain level, with 0 mm representing No Pain and 100 mm representing Worst Possible Pain. Pain will be assessed at each of the patient's follow-up visits and used to measure the change from baseline (prior to the AES procedure). The investigators will use this to measure if the patient's pain level decreases. | 6 months | 
| Patient Function | The American Shoulder and Elbow Surgeons Shoulder Score (ASES) will be used to measure function. This is a score derived from a questionnaire in which the patient answers questions regarding range of motion, stiffness, and pain and how it affects the ability to function. | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Reduction in Medication | Reduction in the number or strength of previously initiated medical therapy (e.g. NSAIDs). | 6 months | 
| Improvement of Range of Motion | Patients' range of motion will be assessed prior to undergoing embolization and at 1,3, and 6 month follow ups. | 6 months |