Patent ID: 8768441

Claim:
A computer-implemented method of recording times of events related to the medical care delivered to patient, and for integrating those times to provide a patient history, the method being implemented using one or more non-transitory computer readable media, comprising: recording a first time of occurrence of a first event; recording first clock information characterizing a first time source from which the first time of occurrence was obtained; recording a second time of occurrence of a second event; recording second clock information characterizing a second time source from which the second time of occurrence was obtained, wherein the first time source and the second time source are independent of one another and not synchronized with one another; transferring recorded data so that the first time of occurrence, the first clock information, the second time of occurrence, and the second clock information are accessible at a computer; producing a patient history using at least the first and second times of occurrence, selecting one of the first and second time sources as a reference time source, synchronizing the first and second times of occurrence to the reference time source, and producing a patient history in which times of occurrence of events are expressed relative to the reference time source, wherein the patient history comprises an integrated electronic patient record.