If you began with 500 mL of normal saline and accounted for 300 mL remaining and 400 mL in the suction canister, what is the estimated blood loss?

To determine the estimated blood loss, we first need to recognize that the total volume of normal saline initially started is 500 mL. After accounting for what remains in the system and what was collected in the suction canister, we assess the quantities left over.

Starting with 500 mL of normal saline, if there are 300 mL remaining in the system and an additional 400 mL accounted for in the suction canister, we can assess how much was used. The total of 300 mL remaining and 400 mL in the suction amounts to 700 mL, which exceeds the initial volume. This indicates the amount that was lost to other factors, which can include estimated blood loss.

To find the estimated blood loss, we can calculate the difference between the total fluids used (700 mL) and the initial amount of saline (500 mL). The estimated blood loss is then calculated as:

700 mL (total accounted for in remaining and suction) - 500 mL (starting volume) = 200 mL.

This calculation shows that the estimated blood loss during the procedure is 200 mL, aligning with the choice provided. Thus, the understanding of fluid balance and the calculations regarding what remains and what