Turisanus

Turisanus de Turisanis^[1] was the Latin name of Pietro Torrigiano de' Torrigiani (died c. 1320), a theoretical physician^[2] from a well-known Florentine family^[3] who taught medicine in Paris, c. 1305–19,^[4] and wrote an elaborated and influential^[5] series of commentaries on Galen's Microtechni, Plusquam commentum in Microtechni Galenii and a shorter De hypostasi urine Galeni. The two commentaries, all that survives of Torrigiani's output, were printed together by Ugo Rugerius^[6] in 1489, and in several later editions, both incunabula and 16th-century printings. The work took the conventional form of the set of quaestiones disputatae familiar in Scholasticism.

Generic portrait of "Trusianus medicus plusq[a]m com[m]entator", woodcut from the Nuremberg Chronicle

He was trained in the famed medical school of Bologna as a pupil of the Florentine Taddeo Alderotti (Thaddeus Florentinus). In his old age he retired to a Carthusian monastery, thus he is referred to a Monachus.^[7]

He was the first medieval physician to propose an original theory about blood and its role in the human system.^{[citation needed]}