title: Measurement of blood loss in clinical studies.
abstract: Direct measurement of blood loss has poor reliability and poor validity. A formula is proposed for how blood loss may be calculated from pre- and post-operative haemoglobin, taking the influence of any blood transfusions into account.
authors.affiliation: Department of Surgery, Danderyd Hospital, Sweden.
authors.forename: P A
authors.initials: PA
authors.lastname: Flordal
mesh_terms: D016063:Blood Loss, Surgical / Q000517:prevention & control*; D001803:Blood Transfusion; D001810:Blood Volume; D006452:Hemoglobinometry; D006801:Humans; D019106:Postoperative Hemorrhage / Q000097:blood / Q000175:diagnosis*; D015203:Reproducibility of Results