The Privacy Rule defines PHI as individually identifiable health information, held or maintained by a covered entity or its business associates acting for the covered entity, that is transmitted or maintained in any form or medium (including the individually identifiable health information of non-U.S. citizens).
Ketamine is most often used in veterinary medicine. It can be used in humans before, during and after surgery to relieve postoperative pain. The drug has also been used for intensive care management of prolonged epileptic seizures.
Today, there are still valid medicinal uses of ketamine for anesthetic reasons, though use is uncommon and tightly restricted. Illicit use today is also of great concern to many. Despite difficulty in determining its prevalence, use is higher today than it was when first introduced.