Allan F Willis

Title: Innovations by Allan F Willis

Introduction

Allan F Willis is a notable inventor based in Newbury Park, California. He has made significant contributions to the field of medical technology, particularly in the area of cardiovascular measurement devices. With a total of 3 patents to his name, Willis has developed innovative solutions that enhance the accuracy and efficiency of medical diagnostics.

Latest Patents

One of his latest patents is for a method of hematocrit measurement by differential optical geometry in a short-term. This invention utilizes an optical fiber to carry a light beam through a cardiovascular catheter, projecting it into the patient's bloodstream. The system employs two additional fibers, strategically positioned to receive scattered light from blood corpuscles and vessel walls. This reflected light is transmitted back through the catheter to detectors outside the body. The electronic instrumentation calculates the ratio of the two light fluxes, effectively canceling out unknown variables. This allows for precise calibration of the measurement in terms of corpuscular concentration, or hematocrit. Advanced versions of this invention also correct for the proximity of blood-vessel walls, making it compatible with optical-fiber measurements of oxygen saturation.

Another significant patent is for a disposable calibration boot for optical-type cardiovascular catheters. This boot holds the catheter tip in a standardized calibration relationship with a calibration substance that reflects light back into the catheter. The design ensures that the calibration substance maintains constant contact with the catheter tip without the use of springs or other forcible devices. The boot is designed to be removed and discarded after calibration, ensuring convenience and efficiency for medical professionals.

Career Highlights

Willis is currently associated with Spectramed, Inc., where he continues to innovate in the field of medical devices. His work has contributed to advancements in cardiovascular diagnostics, improving patient care and outcomes.

Collaborations

Throughout his career, Allan F Willis has collaborated with notable colleagues, including Byron L Moran and Yitzhak Mendelson. These collaborations have further enriched his contributions to the field.

Conclusion

Allan F Willis is a distinguished inventor whose work in medical technology has led to significant advancements in cardiovascular measurement. His innovative patents reflect a commitment to improving diagnostic accuracy and patient care.