Estimation of Blood Loss With Particular Reference to Cardiac Surgery

Abstract

Blood loss during cardiac surgery measured by gravimetric, colorimetric, patientweighing, and red cell volume studies, has been compared. It is concluded that all methods agree closely, but that the red cell volume studies suggest a "concealed" blood loss at the operation site, not measured by other methods. The colorimetric method described here offers a simple and practical means of measuring blood loss during surgery and has been introduced as routine during all major surgical procedures requiring blood replacement. It is emphasized that the blood loss measured in this way is the minimum loss and represents the minimum amount of whole blood that should be replaced by transfusion.

Blood loss assessment in abdominal hysterectomy: how accurate?

“…), automated blood loss meter based on electrolyte conductivity, calorimetric method and measuring the radioactivity of blood. 7 There is currently no clear, concise method for predicting intra-operative blood loss.…”

The Effect of Anaesthesia, Hypotension, and Epidural Analgesia on Blood Loss in Surgery for Pelvic Floor Repair

“…The wide range of bleeding is an invariable feature of all blood loss investigations. It occurs in vaginal surgery (Buchman, 1953;Lazar and Kreiger, 1959;Dillon, 1962;Copenhaver, 1964), prostatectomy (Bodman, 1959), cardiac surgery (Thornton et al, 1963), obstetrics (Wallace, 1967) and paediatrics (Jones, 1962). Hercus and bis associates measured blood loss in 412 major operations.…”

Operative Blood Loss and the Frequency of Haemorrhage Associated With Adenotonsillectomy in Children: A Double-Blind Trial of Ethamsylate

“…The haemoglobin content of all swabs, towels and fluid collected at each operation was estimated using the E.E.L. Colorimeter (Rains, 1955;Roe, Gardiner and Dudley, 1962;Rustad, 1963;Thornton et al, 1963). All estimations were carried out by the same senior technician.…”