Avicenna: vérvétel vagy vérleengedés? Tanulmány egy középkori arab orvosi eljárásról, amely tartalmazza a Kánon első könyve egy fejezetének fordítását.

Blood-sampling or/and bloodletting as an alternative therapy in medieval Arab medicine may have occurred for a variety of reasons: either after the failure of herbal treatment, or specific treatment of serious and infectious diseases (e.g., smallpox, measles, liver disease) or when the patient's blood loss for another reason was to be offset by this. During the adjunctive treatment, there was not the amount of drained blood of primary importance, but the change in the condition and characteristics of the blood during draining and the restoration of the quality characteristics/balance of the blood. Concerning the blood purification (restoration of the quantitative balance of the blood), primarily the amount of bloodletting was significant and precisely determined. In such cases, the aim was to restart the blocked blood flow, redirecting it from one place to another, and removing the excess blood and bodily fluids. According to vascular occlusion, “congestion,” leads to inflammation, which then progresses to a variety of diseases, maintaining a balance of qualitative and quantitative variables is often associated with medicine.