Education
He studied medicine at the Universities of Leipzig and Berlin.
He studied medicine at the Universities of Leipzig and Berlin.
He earned his medical doctorate in 1890, and later worked as a physician at the city hospital in Dresden. In the 1890s, Kelling devised an esophagoscope
Kelling specialized in gastrointestinal physiology and anatomy. He is credited with performing the first laparoscopic examination, a procedure he referred to as "celioscopy".
In 1901 he performed the procedure on the abdomen of a dog using a Nitze-cystoscope.
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.