Spitz-Holter Valve
The first working ventriculoperitoneal shunt from the 1950s developed by John Holter and Eugene Bernard Spitz. 1). It is a common procedure for hydrocephalus treatment
1)
Boockvar JA, Loudon W, Sutton LN. Development of the Spitz-Holter valve in
Philadelphia. J Neurosurg. 2001 Jul;95(1):145-7. PubMed PMID: 11453388.