Prior to cystoscopic viewing of the abdomen, Kelling insufflated it with filtered air via a device known as a trocar. Insufflation was used to create a pneumoperitoneum in order to prevent intra-abdominal bleeding.
Before performing a cystoscopic examination of the abdominal cavity, Kelling introduced clean air into the area through a device called a trocar. This helped to create a contained environment that prevented internal bleeding.