In a medical device, a Tx Clock Button is presented on a graphics display
overlain with a touch screen which allows an operator to control multiple
functions of the medical device. Various parts of Tx Clock Button may be
displayed in different colors, and based on the state of treatment at a
given time and in response to the operator touching Tx Clock Button, the
colors may change to visually indicate a change in state. When the Tx
Clock Button is touched for the first time after a new patient has been
selected, multiple functions, times, displays, parameters, and alarms of
the medical device are initiated. When the Tx Clock Button is touched for
the second time, various ones of the multiple functions, times, displays,
parameters, and alarms may be suspended. A third touch of the Tx Clock
Button may resume the suspended items.
