Stryker Corporation

University of Michigan

Robert Mitchell Baldwin, Ii

Adam Darwin Downey

Mark William Friedman

Darryl D Daniel

Benjamin Fineout

Jon Bodnar

Michael Teasdale Smith

Kevin R Ward

Kayvan Najarian

Anthony William Gatica

Hasan B Alam

Brett Robert Merkel

Jonathan Bodnar

Brett Merkel

Anthony Gatica

Ben Fineout

Steve Rolfson, Jr

Brett R Merkel

Darryl D Ii Daniel

Anthony W Gatica

An aspiration system to control vacuum pressure in an ultrasonic surgical handpiece to result in improved control responsiveness during aspiration. The system comprises a console including a vacuum pump. The system includes a cassette comprising a joint that divides a vacuum path into at least two flow paths. A first joint port couples to a first flow path. A second flow path is coupled to a second joint port, a third flow path is coupled to a third joint port, and a fourth flow path is coupled to a port on a surgical waste receiver. A first sensor senses pressure in the fourth flow path and provides a waste receiver pressure signal. A second sensor senses pressure in the third flow path and provides a tip pressure signal. The controller controls a position of a first vent valve and a second vent valve based on the waste receiver pressure signal and the tip pressure signal, respectively.

Systems and methods for improving control responsiveness during aspiration

An ultrasonic surgical tool system with a tip capable of simultaneously vibrating in plural modes. The system includes a console capable of supplying a drive signal to the tip that includes plural components. Each component has a frequency characteristic that is based in part on the equivalent of current through the mechanical components of the tip. The frequency components are different from each other. Based on the application of drive signal the tip undergoes non-linear vibrations.

Ultrasonic surgical tool capable of vibrating in plural modes and a drive system that induces non-linear vibrations in the tool tip

A system for maintaining permissive hypotension in a patient includes monitoring of blood perfusion and pressure, combining blood perfusion and pressure data to determine systolic blood pressure, monitoring for detection of systolic blood pressure below a critical threshold value, and providing an alert to perfusion options to maintain permissive hypotension. The system may be adapted to adjust the critical threshold value for systolic blood pressure as treatment progresses.

System for providing continuous systolic blood pressure measurement to maintain permissive hypotension

Growing community of inventors

Grand Rapids, MI, United States of America

Robert Mitchell Baldwin, Ii