Measurement of vein size using ultrasound in patients prior to Peripherally Inserted Central Catheter insertion.

The diameter of the basilic, brachial and cephalic veins of both arms will be measured using ultrasound prior to PICC insertion. After vein measurement is complete the researcher will ask the participant to indicate their dominant arm. At this point the PICC inserter will chose the largest vein identified on ultrasound to insert the device and the vein used will be measured at the insertion site. PICC diameter will be obtained from manufacturer information to determine the vein occupation ratio. At approximately nine weeks post insertion, the unit record number of each patient will be used to gain access to medical records to gather treatment management information as well as be matched to DVT reports generated by the Radiology Department.