Dialyzers reprocessed with bleach have increased membrane permeability. What concern might this cause for the patient during the dialysis session?

When dialyzers are reprocessed with bleach, they undergo a cleaning and sterilization process that can potentially alter the properties of the membrane. Increased membrane permeability as a result of this process raises concerns about the transfer of substances during dialysis, particularly the movement of bacteria and endotoxins.

This risk becomes significant because, if the integrity of the dialyzer membrane is compromised due to reprocessing, harmful substances present in the dialysate could pass through the membrane and enter the patient's bloodstream. Bacteria and endotoxins can cause serious health complications, including infections and systemic inflammatory responses. Therefore, the concern for the patient is heightened for the possibility of these contaminants being delivered directly into their circulation, which is why the indicated concern regarding the risk of bacteria and endotoxins is particularly critical in this context.

The other options may highlight various risks associated with dialyzer reprocessing but do not fully encapsulate the critical concern regarding increased membrane permeability leading to the potential for harmful substances to cross into the blood—making the correct option the most relevant in this scenario.