Medicine does not provide this answer. In 1942, Dr. John Lundy believed that a person with hemoglobin of 10 g/dL or less, would be at risk of death, therefore, he proposed blood transfusion to all patients who achieved such a hemoglobin level. Unfortunately, this idea lasted for over half a century. After year 2000, the risk of death came to be considered for patients with hemoglobin

below 8 g/dL.

Fortunately, medical knowledge evolved greatly over the past decade, and one of the major discoveries in transfusional practice was that human beings not just tolerate 8 g/dL of moglobin, but much lower levels than this. Recent researches show survival of patients even in severe anemia condition.

Dr. Graffeo reported that his patient reached level of 1.9 g/dL of hemoglobin and he did not die.

Dr. Liana Araújo reported that one of her patients survived even after target a hemoglobin level of 1.4 g/dL.

Another case described in abstracts published in the Brazilian Archives of Cardiology (January 2015) showed a patient who achieved 2.9 g/dL of hemoglobin and requiring hemodialysis.

For many doctors these values would be incompatible with life.

Nonetheless, all of these survived without the use of blood and blood components.

However, to highlight even more that there is an individual tolerance of every human being to critical levels of blood in the body JianQiang Dai has reported the survival of his patient after he has reached 0.7 g/dL of hemoglobin.

(Learn more on the SCIENTIFIC EVIDENCE section)

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