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 examining the abdomen using a cystoscope, Kelling filled it with clean air through a device called a trocar. This was done to produce a cushion of gas inside the abdomen to stop internal bleeding.