Brinchmann
finished his secondary education in 1906. He then studied medicine, graduating as
cand.med. in 1912. From 1913 to 1914 he specialized in
pediatrics at the
Charité Hospital in
Berlin. From 1918 until 1971, he worked at
Rikshospitalet in Kristiania. He was authorized as a specialist in pediatrics in 1921, and became a medical doctor in 1922. Among his medical writings were articles on children's
tuberculosis, and later
mental hygiene for children. He was the chairman of the Norwegian Pediatric Society (
Barnelegeforeningen) from 1933 to 1934. He received the
King's Medal of Merit (
Kongens fortjenstmedalje) in gold in 1952.{{cite web|url = https://lokalhistoriewiki.no/wiki/Kongens_fortjenstmedalje |title= Kongens fortjenstmedalje ==Literary career==