Some physicians considered bloodletting useful for a more limited range of purposes, such as to "clear out" infected or weakened blood or its ability to "cause hæmorrhages to cease"—as evidenced in a call for a "fair trial for blood-letting as a remedy" in 1871.
一些医师认为放血仍对于一些有限的目的有效，例如“清除”被感染的或虚弱的血液，或其“可使出血停止”的能力，并在1871年发起“公平鉴定放血疗法”的呼吁。