Boston Scientific Scimed, Inc.

Monolithic Power Systems, Inc.

Qian Li

Wenguang Li

David Burgess

Justin Michael Lerman

Tao Zhao

Chiahsin Chang

Hang Shao

Jeffrey Jull

A method, device, and system for evaluating a vessel of a patient, and in particular the hemodynamic impact of a stenosis within the vessel of a patient. Proximal and distal pressure measurements are made using first and second instrument while the first instrument is moved longitudinally through the vessel from a first position to a second position and the second instrument remains in a fixed longitudinal position within the vessel. A series of pressure ratio values are calculated, and a pressure ratio curve is generated. One or more stepped change in the pressure ratio curve are then identified and/or located using an Automatic Step Detection (ASD) process and/or algorithm. The ASD includes identifying a general position of a starting point of the stepped change by identifying a change in the pressure ratio values within a first window along the pressure ratio curve that is at or above a first threshold change value, and identifying an optimized position of the starting point by identifying a change in the pressure ratio values within a second window along the pressure ratio curve that is at or above a second threshold change value, wherein the second window is smaller than the first window, and the second threshold change value is smaller than the first threshold change value.

Methods for assessing a vessel with sequential physiological measurements

A trans-inductor voltage regulator (TLVR) circuit has multiple phases and a regulator block for each phase. Each regulator block is connected to an output capacitor of the TLVR circuit by way of a first winding of a corresponding nonlinear transformer. A second winding of the nonlinear transformers are connected in series with a compensation inductor. The first winding of the corresponding nonlinear transformer has a first inductance when a load current is at a first level, and the first winding of the corresponding nonlinear transformer has a second inductance that is less than the first inductance when the load current is at a second level that is higher than the first level.

Trans-inductor voltage regulator with nonlinear transformer

A method for correcting audible noise from a voltage regulator due to a change of a VID indicated by a series of VID commands. A VID difference between a current value and a target value of the VID is compared with a VID threshold when a VID command for changing the VID from the current value to the target value is received. The VID is held at the current value if the VID difference is larger than the VID threshold. And the VID command is executed if a holding duration for holding the VID at the current value expires and no new VID command for changing the VID is received before the expiration of the holding duration.

VID-controlled voltage regulator with audible noise correction

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San Jose, CA, United States of America

Qian Li