This case involves a 36-year-old man who underwent a laparoscopic kidney transplant in order to donate his kidney. The donor renal artery had an early branch to the upper pole, so the surgeon used an endostapler to ligate the artery. The stapler was fired and then withdrawn slowly. Rapid arterial bleeding was noted as the surgeon withdrew the stapler. The surgeon immediately made a flank incision, exposed the aorta, and held pressure until the patient was hemodynamically stable. It was alleged that the stapler was not released completely leading to the torn artery. An expert biomedical engineer familiar with endostaplers was sought to review the device in question to see if a design or manufacturing defect may have contributed to the patient’s injury.
Question(s) For Expert Witness
1. Please describe your work with surgical devices such as endostaplers.
2. Have you designed or conducted failure analysis of an endostapler? If so, please describe.
Expert Witness Response E-052514
I have been involved in the development of medical devices for many years at a surgical device manufacturer, and I currently serve as CEO of my own company. I am very familiar with vascular endostapling devices, having served in research and development for the surgical device manufacturer, where I led product development and design reviews for stapling devices. As a result, I can evaluate them to determine if there are design and performance defects which could result in malfunction during surgery, or whether device failure was due to operator error. I am also an inventor of several stapling device patents issued by the United States Patent & Trademark Office. There are also design control procedures that companies have to abide by. Oftentimes, when these devices are not properly checked and they have defects, these defective devices can reach a patient and something can go wrong. I have done technical design reviews and understand what can go wrong when a TA endostapler is used the wrong way in the operating theater. Sometimes, complications can be attributed to surgeon error rather than device malfunction. This is especially true in cases of stapler misfire or clamping down on the wrong area.
About the author
Wendy Ketner, M.D.
Dr. Wendy Ketner is a distinguished medical professional with a comprehensive background in surgery and medical research. Currently serving as the Senior Vice President of Medical Affairs at the Expert Institute, she plays a pivotal role in overseeing the organization's most important client relationships. Dr. Ketner's extensive surgical training was completed at Mount Sinai Beth Israel, where she gained hands-on experience in various general surgery procedures, including hernia repairs, cholecystectomies, appendectomies, mastectomies for breast cancer, breast reconstruction, surgical oncology, vascular surgery, and colorectal surgery. She also provided care in the surgical intensive care unit.
Her research interests have focused on post-mastectomy reconstruction and the surgical treatment of gastric cancer, including co-authoring a textbook chapter on the subject. Additionally, she has contributed to research on the percutaneous delivery of stem cells following myocardial infarction.
Dr. Ketner's educational background includes a Bachelor's degree from Yale University in Latin American Studies and a Doctor of Medicine (M.D.) from SUNY Downstate College of Medicine. Moreover, she is a member of the Board of Advisors for Opollo Technologies, a fintech healthcare AI company, contributing her medical expertise to enhance healthcare technology solutions. Her role at Expert Institute involves leveraging her medical knowledge to provide insights into legal cases, underscoring her unique blend of medical and legal acumen.
