What must be ensured during the flushing process of a dialyzer before patient use?

During the flushing process of a dialyzer, it is crucial to ensure that no air bubbles remain in the device before its use with a patient. Air bubbles in the dialyzer can lead to air embolism if they enter the patient's bloodstream, which can be a life-threatening condition. Therefore, proper flushing techniques are employed to eliminate any trapped air and to ensure the dialyzer is fully primed with the fluid that will be used for dialysis. This step is critical for patient safety and optimal treatment efficacy.

The other considerations during the flushing process, such as maintaining water temperature, rinsing cleaning agents, and ensuring the use of sterile water, are important for overall quality assurance in dialyzer preparation, but the immediate risk associated with air bubbles makes their absence a top priority during the flushing process.