In our CVICU, all of our OHS patients have swans. One of our surgeons only wedges in the OR for placement, and then asks the RN's not to wedge on a routine basis, especially for the valve patients. He thinks the risks outweigh the benefits, and we use the pa diastolic pressure for cardiac profiles. With the other surgeons, we wedge on arrival from the OR, and q4hrs after that. We wedge more often if we are titrating gtts, or if he calls for a reading.:)