What factor is critically assessed when determining the volume needed for arterial fluid?

The volume needed for arterial fluid is critically assessed based on body weight. This is because the amount of fluid required for proper embalming often correlates with the weight and size of the deceased. Heavier individuals generally have a larger volume of arterial fluid needed to adequately perfuse the body tissues and achieve the desired preservation and appearance.

Other factors such as height, gender, and temperature can influence the embalming process but are not as directly tied to the volume calculation of arterial fluid. Height may indirectly affect volume to some extent, as taller individuals may have more body mass, but body weight is the more significant and direct factor used in practical application. Gender can also have an effect on the average body weight and composition, but again, body weight remains the primary determinant when calculating required fluid volumes. Temperature is relevant for understanding fluid behavior during embalming, but it does not determine the volume needed. Thus, body weight is the key factor for assessing arterial fluid volume.