Juha Antero Hernesniemi (18 October 1947 â 25 June 2023) was a Finnish neurosurgeon and academic, whose clinical work focused on the microsurgical treatment of intracranial aneurysms and arteriovenous malformations (AVMs). He served as chair of neurosurgery at Helsinki University Hospital (HUS) and as professor at the University of Helsinki from 1997 to 2015.
Hernesniemi was born in Kannus, Finland. He studied medicine at the University of Zurich and later completed his doctoral studies at the University of Helsinki. Obituaries also note the influence of professor M. Gazi Yaà Âargil during his time in Zurich.
After positions in Helsinki, Kuopio and Uppsala (1979âÂÂ1983), Hernesniemi served as assistant chief physician (1983âÂÂ1991) and chief physician (1991âÂÂ1997) at the Kuopio University Hospital neurosurgery department; he spent 1992âÂÂ1993 as a research and teaching fellow at the University of Miami. In 1997 he was appointed chair of neurosurgery at HUS (Töölö), serving until his retirement from public office in 2015. Contemporary Finnish sources reported that he operated roughly 400âÂÂ500 cases annually at HUS.
After retiring in Finland at the statutory age of 68, Hernesniemi continued to work abroad as a visiting professor and surgeon, including in Peru, Indonesia, Nepal and the United States. He later served as unit director and neurosurgeon at the Henan Provincial PeopleâÂÂs Hospital in Zhengzhou, China. In 2022 he stated that pandemic restrictions and the war in Ukraine had interrupted his operative work for over a year.
HernesniemiâÂÂs work focused on the microsurgical management of cerebrovascular disease, especially aneurysms and AVMs. Finnish media reported that during his career he participated in the care of more than 70,000 neurosurgical patients and personally performed over 16,000 operations. Educational video archives of his techniques have been made available for professional use.
Hernesniemi died in Helsinki on 25 June 2023, aged 75.