PPT-Haematology Haemostasis The involvement of blood vessels, platelets and blood coagulation

haemostasis Vascular bleeding disorders The underlying abnormalities are either in the vessels themselves perivascular connective tissue Each could be Inherited Acquired autosomal. Abnormalities of Blood Coagulation. Learning Objectives. Describe functions of blood vessels and platelets in controlling bleeding. Explain three phases of coagulation and the respective factors involved. Thrombocytes. Platelets (Thrombocytes). 2- 4 micromillimeters in diameter. 250,000 – 400,000 per microliter . (too few thrombocytopenia – too many thrombocytosis). Lifespan on average 6 – 10 days. Thrombocytes. Platelets (Thrombocytes). 2- 4 micromillimeters in diameter. 250,000 – 400,000 per microliter . (too few thrombocytopenia – too many thrombocytosis). Lifespan on average 6 – 10 days. Waterford, WI. A wound occurs when the a break in tissue occurs. . This can be because of trauma.. It can also be intentional, such as is the case during a surgery.. There are . five kinds . of . wounds (PAAIL).. Cardiovascular System: Blood Clinical Anatomy Tony Serino, Ph.D . Blood: Topic Objectives Be able to describe the physical properties of the blood including its components. Be able to explain how blood cells develop and what key ingredients are necessary in RBC development.  . Platelets . are small colorless. ,. Non . nucleated and moderately refractive bodies which are considered to be the fragments of cytoplasm. .. . Diameter. : 2.5 μ (2 to 4 μ). Volume: 7.5 cu μ (7 to 8 cu μ. Sulistyo. . Rini. , . MSc. Five Stages of . Hemostasis. Vessel spasm. Formation of the platelet plug. Blood coagulation or development of an insoluble fibrin . clot. Clot retraction . Clot dissolution . Us / Mohammed Omballi . MSc. Hematology & immunohematology . The mechanism by which the blood kept in side . the blood . vessels in a fluid . state, . without clotting and stop bleeding . hemostasis. M. AND J. E. WYNANDS, M.D., C.IVI.~ THE V~Y F_~aLY STUVmS of this subject, many controversies existed regard- ing the various factors and mechanisms involved in the dotting process. One simply has to Professor . Dr.Noori. Mohammed . Luaibi. HEMOSTASIS EVENTS . The . term hemostasis means prevention of blood loss. Whenever a vessel is severed or ruptured, hemostasis is achieved by several mechanisms: (. The stoppage of . bleeding. or . hemorrhage. The normal . haemostatic. response; . to vascular damage depends on a closely linked interaction between the . blood vessel wall. , . circulating platelets. By . Dr. Sunita Mittal. Learning Objectives. Platelets Morphology. Hemostasis. Primary hemostasis. Platelet plug formation. Disorders of . p. rimary hemostasis. Secondary hemostasis. Disorders of secondary hemostasis. Nervana. . Bayoumy. . Associate . Professor. Department of Physiology. . Objectives. At the end of this lecture . you . should be able to:. Recognize the different clotting factors. U. nderstand the role of calcium ions during clotting cascades.. Platelets. (Thrombocytes) …. Are small, irregularly-. shaped,oval. non-. neocleated. cells, 2-3 µm in diameter, . derived from fragmentation of precursor megakaryocytes (bone marrow). The average lifespan of a platelet is between 8 and 12 days. .