Estimation of blood loss is inaccurate and unreliable

To determine the characteristics associated with improved accuracy or reliability of estimating operative blood loss.Operating room personnel at a tertiary care hospital evaluated 3 operative simulations and provided estimations of blood loss. The simulations utilized precise, known volumes of porcine blood and saline on tapes, sponges, and in suction containers. Low volume (50 mL), mid volume (300 mL), and high volume (900 mL) blood loss...