During the study whenever you have an arm volume measurement using the Perometer, we will also measure the fluid in your arms using Bioimpedance Spectroscopy. These measurements are made by passing a harmless electrical signal of very low strength through your body to determine the difference in the amount of fluid in each arm. The test is simple and painless, and takes about 3 minutes. In addition, whenever you have an arm measurement, you will be asked to complete a questionnaire. While completing the questionnaire, you can skip any questions you do not wish to answer. The questionnaires will take about 10 minutes to complete. Arm measurements with the Perometer and Bioimpedance Spectroscopy and completion of the questionnaire will occur every 4-7 months when you are at MGH for regular medical visits.
