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The goal of this interventional study is to determine the amount of skin C. acnes reduction with increased pressure during the chlorhexidine gluconate, brand name ChloraPrep, application. The main question it aims to answer is: Does changing the pressure applied during the ChloraPrep application impact the amount of C. acnes bacteria on the skin after one hour? Researchers will compare ChloraPrep applied at a pressure similar to a gentle wipe to ChloraPrep applied at a pressure similar to a massage to see if wash the amount of C. acnes on the skin after one hour is different. Participants will have one shoulder washed with ChloraPrep using pressure meant to impact the dermal layer, similar to a gentle wipe, and the other shoulder washed with ChloraPrep using pressure meant to impact the subdermal layer, similar to a massage. Participants will have swabs taken of their skin before the ChloraPrep application and again one hour after application to look for the amount of C. acnes on the skin.
The goal of the study is to learn if Epidiolex (cannabidiol) works as a additional pain medication in patients who have had orthopedic shoulder surgery. It is also to learn about safe dosages and identify any side effects after surgery. Researchers will compare Epidiolex to a placebo solution to see if Epidiolex lowers pain after shoulder surgery. Participants will: * track their pain and what medications they use every day in a provided pain diary. A researchers will call every seven days to check on the participant and diary. * Complete two short surveys. Once before surgery and once after. * Have bloodwork tested after surgery
This prospective observational study aims to evaluate the incidence of hemidiaphragmatic paralysis in patients receiving interscalene brachial plexus nerve block with prolonged neural blockade. English speaking American Society of Anesthesiologists (ASA) 1-3 patients ages 18-80 receiving prolonged interscalene nerve block will be randomized into 3 groups: first group receiving a perineural catheter infusing 0.2% ropivacaine; the second group receiving a single shot injection of 10mL liposomal bupivacaine (Exparel; n=20) plus 5 mL 0.5% bupivacaine and the third receiving 20mL liposomal bupivacaine plus 5mL bupivacaine (to be determined by the attending anesthesiologist).Primary outcome will be incidence of hemidiaphragmatic paralysis postoperative day 1 as measured by point of care (POCUS) ultrasound.
The purpose of this study is to examine bone-to-bone contact between the tuberosity as compared to a subacromial balloon spacer procedure. Using biplanar fluoroscopy to determine the three-dimensional (3D) motion of the shoulder compared pre-procedure to post-procedure, the investigators will be able to assess 1) the bone-to-bone contact of the tuberosity and acromion in the setting of a massive posterior superior rotator cuff tear 2) if the placement of a dermal allograft over the tuberosity does indeed decrease bone contact and 3) if the placement of a subacromial balloon spacer decreases bone-to-bone contact. Doing so will allow assessment of the relative contribution of the implant for arm elevation versus potential compensatory motion of increased scapulothoracic motion. The investigators will also be able to correlate this to patient-reported outcomes of pain and shoulder function.
The purpose of this study is to examine the rotator cuff muscles in your shoulder at one and two year post total shoulder replacement surgery.