Dräger is bringing the Infinity CNAP system for non-invasive blood pressure measurement to the U.S. This is a technology that was clinically tested on patients undergoing general anesthesia and found to provide “real-time estimates of arterial pressure comparable with those generated by an invasive intra-arterial catheter system.” The technology can potentially be used to keep a vigilant eye on other risky patients, such as in PACUs or on post operative floors. Developed by CNSystems (Graz, Austria), the technology provides continuous beat-to-beat readings of systolic, diastolic and mean blood pressure using a double finger sensor. More details from the Dräger press release: 
The system works by integrating a light-emitting diode and detector into a double-finger sensor cuff. As the sensor detects changes in blood volume based on the amount of light transmitted through the finger, the cuff pressure closely follows the instantaneous pulsatile blood pressure changes in the finger arteries. Blood pressure can then be calculated beat-to-beat, after calibration with the built-in standard oscillometric measurement (NBP) of the monitor – and a high resolution, real-time arterial pressure waveform and systolic, diastolic and mean pressure value are displayed on the monitor. Draeger developed the CNAP pod to bring this innovative technology to its installed base of Infinity Omega and Omega-S solutions, as well as Delta, Delta XL and Kappa patient monitors.
Press release: Draeger Patient Monitors First to Offer Continuous Noninvasive Arterial Pressure (CNAP) technology in the United States Product page: Infinity CNAP SmartPod… Abstract at Br. J. Anaesth.: Precision and accuracy of a new device (CNAP™) for continuous non-invasive arterial pressure monitoring: assessment during general anaesthesia Br. J. Anaesth. (2010) 105 (3): 264-272.