Subjects must not have a coagulopathy (platelet <50,000, INR>1.5, or bleeding disorder, or on blood thinners) Subjects with platelets below 50,000 will not be eligible to participate in this study due to the risk of bleeding. Patients will be asked to discontinue use of non-steroidals for 5 days prior to the procedure. Patients on plavix will be asked to discontinue use for 7 days prior to the procedure if they are clinically able to do so. Patients on coumadin or lovenox will also need to discontinue use prior to the procedure, but decisions regarding their management will be made on an individual basis as per our usual standards of care.