Joseph D. Tobias

This observational study will use ultrasound to measure the size of two arteries in the arms of 100 children undergoing surgery. The goal is to see if the dominant hand has larger arteries than the non-dominant hand. The findings could help guide medical procedures like placing I…

This study looks at how two common monitoring tools—one that measures blood pressure changes and one that measures oxygen levels—change when a child is moved from lying on their back to lying on their stomach during surgery. About 100 children having surgery with general anesthes…

This study compares nerve-muscle communication in infants (under 3 months) and older patients (12+ years) during surgery. Using a special monitor called TetraGraph™, researchers will measure muscle responses to electrical signals. The goal is to understand how these signals diffe…