Abstract
An idea of morphology index was introduced to describe quantitatively morphologic change of platelets after incubation on various materials. Platelets were categolized into 4 types, number of platelets of each type was determined on the basis of scanning electron micrographs and then the morphology index was calculated. The index gives information on average morphology of platelets. Index 1 means normal morphology of 100% of platelets, index 4 means completely abnormal of all platelets and all the indices fall between 1 and 4. In the present study the morphology index distributed between 1.66 for Cardiothane and 2.37 for plastic sheet for cell culture.