David H Liang

Title: Innovations by David H Liang

Introduction

David H Liang is a notable inventor based in Menlo Park, CA. He has made significant contributions to the field of medical technology, particularly in the development of advanced catheter systems. With a total of 5 patents, his work focuses on enhancing the precision and effectiveness of minimally invasive surgical procedures.

Latest Patents

One of his latest patents is titled "Sensors and control for an interventional catheter." This invention provides small position sensors for applications requiring localized sensing in a compact space while also measuring large relative displacements. It enables surgeons to accurately position the tip of a catheter during minimally invasive therapy. The invention enhances the quality of tactile feedback to physicians during catheter-based surgeries by incorporating an axial force sensor at the catheter's tip, allowing for the transmission of force information to the physician. Another embodiment of this invention features a position sensor for active interventional catheters, utilizing laser-machined shape memory alloy (SMA) and heated SMA or wire-pulleys for catheter actuation. This technology facilitates closed-loop control of the catheter tip position under computer-aided guidance, providing essential force feedback to the physician.

Another significant patent is "Tubular compliant mechanisms for ultrasonic imaging systems and intravascular interventional devices." This invention involves a micromanipulator with a tubular structure and a compliance mechanism made from elastic and/or superelastic materials. Fabricated using laser machining, the micromanipulator has no mechanical joints, allowing for various motions and degrees of freedom without permanent deformation. Shape Memory Alloys (SMAs) serve as the main actuators, enabling intricate movements for intravascular interventional applications, particularly in ultrasonic imaging when paired with an ultrasound transducer.

Career Highlights

David H Liang has worked at Leland Stanford Junior University, where he has contributed to various research projects and innovations in medical technology. His expertise in the field has led to the development of groundbreaking inventions that improve surgical outcomes.

Collaborations

Some of his notable coworkers include Bob S Hu and Byong-Ho Park, who have collaborated with him on various projects, enhancing the scope and impact of their innovations.

Conclusion

David H Liang's contributions to medical technology through his patents and innovations have significantly advanced the field of minimally invasive surgery. His work continues to influence the development of more effective and precise surgical tools.