Germicide rebound occurs due to

Germicide rebound occurs due to

• A. Air embolism
• B. Excessive rinseback
• C. High dialysate temperature
• D. Inadequate dialyzer priming

Answer: (D)

Germicide rebound happens when residual disinfectant remains in the dialyzer and circuit after the disinfection process. If the dialyzer isn’t thoroughly primed and flushed with saline to remove that germicide, some of the disinfectant can diffuse back into the patient’s bloodstream once therapy begins. The dialyzer membrane and lines form a reservoir of germicide, and as blood passes through, a concentration gradient can cause that disinfectant to re-enter circulation, producing a rebound effect. This is why insufficient dialyzer priming is the best explanation. The other options don’t describe the mechanism of germicide re-entry: air embolism relates to air in the circuit, excessive rinseback concerns returning a lot of the patient’s blood, and high dialysate temperature affects temperature-related risks rather than disinfectant diffusion.

Germicide rebound happens when residual disinfectant remains in the dialyzer and circuit after the disinfection process. If the dialyzer isn’t thoroughly primed and flushed with saline to remove that germicide, some of the disinfectant can diffuse back into the patient’s bloodstream once therapy begins. The dialyzer membrane and lines form a reservoir of germicide, and as blood passes through, a concentration gradient can cause that disinfectant to re-enter circulation, producing a rebound effect.

This is why insufficient dialyzer priming is the best explanation. The other options don’t describe the mechanism of germicide re-entry: air embolism relates to air in the circuit, excessive rinseback concerns returning a lot of the patient’s blood, and high dialysate temperature affects temperature-related risks rather than disinfectant diffusion.