There are several potential uses for Google Wave in the healthcare context. The first, most powerful use is the ability of the health community to implement patient-centered communication. Doctors and patients are able to initiate communicate around a condition and all things related to the patient's condition are captured within a wavelet (individual conversations/collaborations). Things like MRI's and test results can be appended to a wave and doctors and specialists can collaborate through the wave. Since the communication is server-based, these conversations can be captured, secured, tagged, searched.
This is great way of improving doctor-patient communication as well as patient-patient communication !