Which one of the following is NOT typically found in a pre-injection fluid?

The use of pre-injection fluids in embalming serves specific purposes, and understanding their composition is critical for effective practices. Pre-injection fluids are typically used to prepare the body for the embalming process by aiding in the softening of tissues and the clearing of fluids in the vascular system.

While formaldehyde is a significant component of embalming fluids, pre-injection fluids generally do not contain a high concentration of formaldehyde. Instead, pre-injection fluids are often made up of water, dyes, and anticoagulants, which help in managing blood viscosity and facilitating the flow of embalming solutions. These components are specifically chosen to mimic bodily fluids and prepare the tissues for more comprehensive embalming treatments that follow.

In contrast, high concentrations of formaldehyde are primarily used in the embalming fluid applied after the pre-injection phase, when the actual preservation and disinfection of tissues occur. Therefore, it is accurate to state that a high concentration of formaldehyde is not typically found in pre-injection fluids, making it the correct choice in this context.