A Study to Find Out if ASP5354 Can Clearly Help Show the Ureter During Surgery

The ureter was the tube that carries urine from the kidneys to the bladder. It was difficult for surgeons to see the ureter during abdominal surgery. This could lead to injuring the ureter which, although rare, could be serious. This study was about a potential new medical dye, called ASP5354. This dye was injected into the person at the start of surgery and was detected in the ureter. This was done by an imaging machine which had an option called near infrared fluorescence, or NIR-F. Together they showed live images of specific parts of the body. In this study, ASP5354 was used with an imaging machine with a NIR-F option to show live images of the ureter during surgery. People with kidneys that work properly and those with kidney problems could take part. The main aim of the study was to find out how clearly the ureter could be seen with ASP5354 during surgery in adults whose kidneys work properly or who have mild kidney problems. To do this, the surgeons injected ASP5354 into the person having surgery. Then, the surgeons compared images of the ureter with an imaging machine using normal white light and with the NIR-F option. Imaging using normal white light was the standard way surgeons see the ureter during surgery. People 12 years or older who were going to have certain abdominal surgeries could take part. Everyone taking part received ASP5354 during surgery, but how the imaging was done depended on which group they are in. Before surgery, the adults taking part whose kidneys work properly or who have mild kidney problems were assigned into 1 of 2 groups by chance alone. Images of the ureter were checked in 1 group using normal white light and the other group using normal white light and NIR-F. People 18 years and older with more severe kidney problems and all people under 18 years old were not be assigned to 1 of 2 groups: all images of the ureter were checked using normal white light and NIR-F. At the start of surgery, the surgeon injected ASP5354 into the per