Louis Tanquerel des Planches

Louis Jean-Charles-Marie-Tanquerel des Planches (11 August 1810, Ambrières-les-Vallées – 27 May 1862) was a French physician.
He is known for his research of lead poisoning, about which, he is credited with conducting one of the first comprehensive studies of occupational illness. By way of analysis of 1200 cases of lead poisoning at the Hôpital de la Charité in Paris, he reported that the disease was more frequently found in workers who were exposed to lead fumes than those who worked with the solid metal. In his studies he used the term "encéphalopathie saturnine" to point out neuropsychiatric indications of lead poisoning.