Abstract: A gatekeeper electronic signal can be generated by a patient sensor and/or in an intermediate device, such as an electrical cable, that is separate from a patient's physiological information electronic signal. The gatekeeper signal can be generated to indicate to a computer monitor that the sensor and/or cable is of the type that is compatible with, and/or usable with, such computer monitor, and/or that the sensor and/or cable is properly attached to the computer monitor. The gatekeeper signal can be created by an ambient temperature sensor on, or in electrical communication with, the patient monitor, and/or the gatekeeper signal can be created by a gatekeeper electronic signal generator to simulate an ambient temperature value. The gatekeeper signal can be separate from an electronic signal or plurality of signals that include patient physiological information, and the gatekeeper signal may not include any patient physiological information.

Abstract: A patient monitor configured to receive patient-information electrical signals from an invasive patient sensor and a minimally invasive patient sensor, the patient monitor including a base unit and a detachable user interface unit for displaying hemodynamic parameters determined by the base unit. The base unit and user interface unit can be docked together, tethered together through a cabled connection, or physically separated from one another using wireless communication to transmit and receive information. The base unit and the user interface unit may pair before the user interface unit displays data to link the base unit with the user interface unit. The patient monitor can be configured to switch between invasive and minimally invasive monitoring of hemodynamic parameters of a patient, using invasive measurements to calibrate minimally invasive measurements.

Abstract: A patient monitor configured to receive patient-information electrical signals from an invasive patient sensor and a minimally invasive patient sensor, the patient monitor including a base unit and a detachable user interface unit for displaying hemodynamic parameters determined by the base unit. The base unit and user interface unit can be docked together, tethered together through a cabled connection, or physically separated from one another using wireless communication to transmit and receive information. The base unit and the user interface unit may pair before the user interface unit displays data to link the base unit with the user interface unit. The patient monitor can be configured to switch between invasive and minimally invasive monitoring of hemodynamic parameters of a patient, using invasive measurements to calibrate minimally invasive measurements.

Abstract: A gatekeeper electronic signal can be generated by a patient sensor and/or in an intermediate device, such as an electrical cable, that is separate from a patient's physiological information electronic signal. The gatekeeper signal can be generated to indicate to a computer monitor that the sensor and/or cable is of the type that is compatible with, and/or usable with, such computer monitor, and/or that the sensor and/or cable is properly attached to the computer monitor. The gatekeeper signal can be created by an ambient temperature sensor on, or in electrical communication with, the patient monitor, and/or the gatekeeper signal can be created by a gatekeeper electronic signal generator to simulate an ambient temperature value. The gatekeeper signal can be separate from an electronic signal or plurality of signals that include patient physiological information, and the gatekeeper signal may not include any patient physiological information.

Abstract: A gatekeeper electronic signal can be generated by a patient sensor and/or in an intermediate device, such as an electrical cable, that is separate from a patient's physiological information electronic signal. The gatekeeper signal can be generated to indicate to a computer monitor that the sensor and/or cable is of the type that is compatible with, and/or usable with, such computer monitor, and/or that the sensor and/or cable is properly attached to the computer monitor. The gatekeeper signal can be created by an ambient temperature sensor on, or in electrical communication with, the patient monitor, and/or the gatekeeper signal can be created by a gatekeeper electronic signal generator to simulate an ambient temperature value. The gatekeeper signal can be separate from an electronic signal or plurality of signals that include patient physiological information, and the gatekeeper signal may not include any patient physiological information.

Abstract: A patient monitor configured to receive patient-information electrical signals from an invasive patient sensor and a minimally invasive patient sensor, the patient monitor including a base unit and a detachable user interface unit for displaying hemodynamic parameters determined by the base unit. The base unit and user interface unit can be docked together, tethered together through a cabled connection, or physically separated from one another using wireless communication to transmit and receive information. The base unit and the user interface unit may pair before the user interface unit displays data to link the base unit with the user interface unit. The patient monitor can be configured to switch between invasive and minimally invasive monitoring of hemodynamic parameters of a patient, using invasive measurements to calibrate minimally invasive measurements.

Abstract: A gatekeeper electronic signal can be generated by a patient sensor and/or in an intermediate device, such as an electrical cable, that is separate from a patient's physiological information electronic signal. The gatekeeper signal can be generated to indicate to a computer monitor that the sensor and/or cable is of the type that is compatible with, and/or usable with, such computer monitor, and/or that the sensor and/or cable is properly attached to the computer monitor. The gatekeeper signal can be created by an ambient temperature sensor on, or in electrical communication with, the patient monitor, and/or the gatekeeper signal can be created by a gatekeeper electronic signal generator to simulate an ambient temperature value. The gatekeeper signal can be separate from an electronic signal or plurality of signals that include patient physiological information, and the gatekeeper signal may not include any patient physiological information.

Abstract: Methods for determining a cardiovascular parameter reflecting fluid or volume changes and for detecting arrhythmia are disclosed. These methods involve receiving a waveform dataset corresponding to an arterial blood pressure, pulseox, Doppler ultrasound or bioimpedance signal and analyzing the waveform to detect irregular cardiac cycles. Irregular cardiac cycles are detected, for example, by comparing parameters of individual cardiac cycles to the parameters of other or average cardiac cycles. If any irregular cardiac cycles are present, their effect is compensated for to form a modified waveform dataset. Once any irregular cardiac cycles are compensated for, a cardiovascular parameter reflecting fluid or volume changes using the modified waveform dataset is calculated. In the method for determining arrhythmia, if the number of irregular cardiac cycles exceeds a predetermined arrhythmia threshold, a user such as a medical professional is notified.

Abstract: Methods for the detection of vascular conditions such as vasodilation in a subject are described. The methods involve receiving a signal corresponding to an arterial blood pressure and calculating one or more cardiovascular parameters from the arterial blood pressure. The cardiovascular parameters are calculated using factors impacted by vascular conditions such as vasodilation. Factors impacted by these vascular conditions include the area under the systolic portion of the arterial blood pressure signal, the duration of systole, and the ratio of the duration of the systole to the duration of the diastole. By monitoring cardiovascular parameters that are calculated using factors impacted by vascular conditions such as vasodilation for changes indicating the vascular conditions, such vascular conditions can be detected.

Abstract: Methods for determining a cardiovascular parameter reflecting fluid or volume changes and for detecting arrhythmia are disclosed. These methods involve receiving a waveform dataset corresponding to an arterial blood pressure, pulseox, Doppler ultrasound or bioimpedance signal and analyzing the waveform to detect premature ventrical or atrial contractions. Premature ventrical or atrial contractions are detected, for example, by comparing parameters of individual cardiac cycles to the parameters of other or average cardiac cycles. If any premature ventrical or atrial contractions are present, they are removed from the waveform dataset. Once any the premature ventrical or atrial contractions are removed, a cardiovascular parameter reflecting fluid or volume changes using the modified waveform dataset is calculated. In the method for determining arrhythmia, if the number of premature ventrical or atrial contractions exceeds a predetermined arrhythmia threshold, a user such as a medical professional is notified.