The blood remaining in the patient is diluted. Later, his blood in the external circuit is directed back into him, thus bringing his blood count closer to normal.
जसे की, काही शस्त्रक्रियांमध्ये, हेमोडायल्युशन नावाच्या एका पद्धतीत काही रक्‍त शरीरापासून दुसरीकडे वळवले जाते.