Abstract: Methods and devices useful for monitoring a patient and for monitoring and displaying the value of a physiological parameter are disclosed. In one embodiment, a user interface for a medical monitoring device is provided. The user interface can have a monitoring screen with a current value screen and a trend screen. The current value screen can display a graphical representation of a value of a physiological parameter over time, e.g., over a first time period, and the trend screen can display a graphical representation of a mean value of the parameter over time, e.g., over a second time period. In some embodiments, an out-of-limit condition for the parameter can be indicated with shading. In yet other embodiments, the user interface can provide an event marking screen, which can provide the ability to mark events on a historical trend screen that displays a value of the parameter over time.

Abstract: Methods and devices useful for monitoring a patient and for monitoring and displaying the value of a physiological parameter are disclosed. In one embodiment, a user interface for a medical monitoring device is provided. The user interface can have a monitoring screen with a current value screen and a trend screen. The current value screen can display a graphical representation of a value of a physiological parameter over time, e.g., over a first time period, and the trend screen can display a graphical representation of a mean value of the physiological parameter over time, e.g., over a second time period. The lengths of the time periods can be adjustable. In some embodiments, an out-of-limit condition for the physiological parameter can be indicated with shading. For example, the current value screen can display shading between a graph line representing the value of the physiological parameter over time and a threshold line which sets the alarm threshold.

Abstract: A biventricular cardiac prosthesis has a flow balance control system to balance blood flow through the left and right sides of the prosthesis to maintain a patient's left atrial pressure within physiologic bounds. The prosthesis can be configured to have flow characteristics so that a signal representative of the difference in hydraulic pumping pressures on the left and right sides of the prosthesis is representative of the difference between left and right atrial pressures of a patient having the prosthesis implanted. This signal can be used as a control signal to drive the prosthesis so that left atrial pressure is approximately equal to right atrial pressure, and within physiologic bounds. A specific prosthesis includes left and right pumping sections, each having a blood pumping chamber and a hydraulic fluid chamber, with a reciprocating hydraulic pump driving systole alternately on the right and left sides.

Abstract: A biventricular cardiac prosthesis has a flow balance control system to balance blood flow through the left and right sides of the prosthesis to maintain a patient's left atrial pressure within physiologic bounds. The prosthesis can be configured to have flow characteristics so that a signal representative of the difference in hydraulic pumping pressures on the left and right sides of the prosthesis is representative of the difference between left and right atrial pressures of a patient having the prosthesis implanted. This signal can be used as a control signal to drive the prosthesis so that left atrial pressure is approximately equal to right atrial pressure, and within physiologic bounds. A specific prosthesis includes left and right pumping sections, each having a blood pumping chamber and a hydraulic fluid chamber, with a reciprocating hydraulic pump driving systole alternately on the right and left sides.