Since ancient times, leeches were used to treat many illnesses and disease through bloodletting, a method where blood was drawn out in the hope that removing impure blood would heal the body. Believe it or not, leech therapy is sometimes the best alternative in treating illnesses, and even surpasses pharmacological treatments. Because of its healing effects to the human body, this traditional method of curing diseases is still thriving today.
Treating Vascular Disease
It is in the leeches saliva that has been known to cure or prevent diseases. Their saliva has over 100 bioactive substances that are very beneficial. One such component is hirudin, which acts as an anticoagulation agent. Calin is another component that also inhibits blood coagulation. A component that dissolves fibrin clots as well as inhibits the formation of thrombus is the destabilase. Leech saliva also contains a Factor Xa inhibitor, and this compound restrains the coagulating effect of the coagulation Factor Xa. It also has hyaluronidase that enhances the viscosity of the interstitial fluid. For vasodilating effect, it has acetylcholine and histamine-like substances as well as carboxypeptidase A inhibitors. These three can increase blood flow by dilating constricted vessels. These are just some of the very useful components in leech saliva.
Those mentioned above all work together to decrease the viscosity of the blood, making its consistency thinner so as to promote better blood flow. Blood that has a thick consistency makes it prone to clot formation as well as increases the blood pressure of an individual. These clots can travel to different parts of the body and block a vessel, which could then cause a stroke or heart attack. Thick blood poses a risk that the distal extremities, especially the tips of the fingers and toes, will not receive adequate oxygenated blood and the nutrients they need. Therefore, the anticoagulation component in leeches saliva is vital as it naturally makes the blood thinner and works to inhibit platelet coagulation.
Patients with cardiovascular disease undergo leech therapy on different areas of their body than, lets say, patients with peripheral vascular disease. In each case leeches will promote better blood flow to the region.
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