Around 1886, Senn successfully tested the diagnosis of gastrointestinal perforation by inflation with hydrogen gas. Senn used a rubber balloon connected to a rubber tube inserted in his anus to pump 6 liters of hydrogen gas into his intestinal tract. An assistant sealed the tube by squeezing the anus against it. The hydrogen was inserted by squeezing the balloon while monitoring the pressure on a manometer. Senn had previously carried out this experiment on dogs to the point of rupturing the intestine.[9]
Sometime during his career, he was also Surgeon General of the National Guard of Illinois and Wisconsin,[2][6] and founded the Association of Military Surgeons of the State of Illinois, which he presided over until his death.[8]
Legacy
Senn published 25 books as well as numerous papers and essays during his career,[2] including the 1886 paper Surgery of the pancreas as based upon experiments and clinical research,[5] and the books Four Months Among the Surgeons of Europe and the Nurse's Guide for the Operating Room.[4]
Throughout his career, Senn amassed a collection of 10,000 volumes and 14,000 pamphlets and articles dating from the 1500s onwards on medicine and surgery, which has been stored in the John Crerar Library. He also purchased the 7,000 volume collection of old and rare medical books left by a prominent doctor in Germany and donated the materials to the Newberry Library.[2][6]
Senn is the namesake for Senn High School in Chicago, which was named for him on March 20, 1909 following his death.[2][8] Senn is also known for saying "The fate of the wounded rests with the one who applies the first dressing" in 1897.[11]
Senn also authored a book, Around the World via India - a medical tour, published by American Medical Association Press, Chicago, in 1905.