- Category : 1886-births
- Type : GE
- Profile : 3/5 - Martyr / Heretic
- Definition : Triple Split
- Incarnation Cross : RAX Unexpected 1
German medical doctor who performed the first human hemodialysis treatment in 1924 in the town of Giessen, Germany. The procedure lasted only 15 minutes, and hirudin served as the anticoagulant. Haas was able to develop a dialyzer consisting of U-shaped collodion tubes immersed in a dialysate bath placed in a glass cylinder. He performed several hemodialysis procedures in uremics between 1924 and 1928, and reported for the first time the clinical results obtained. In 1928, Haas introduced heparin into the dialysis procedure. Because of lack of support by the medical community, Haas was forced to discontinue his promising work.
He died on 9 December 1971, aged 85, in Gießen.