ABSTRACT
Objective To establish a rabbit auricular hematoma model,to observe the process of production and absorption,and to study the location of hematoma and method of its removal Methods Ten health New Zealand rabbits were divided randomly into control group and experimental group.A weight was dropped onto particular locality of auricles 3-6 times until a big hematoma appeared.The pathological processes of hematoma were observed,and the hematoma was formed 1 hour and the hematoma was almost absorbed after 4 days.The drainage experiment was conducted to observe the effect of needle aspiration or incision and drainage on the hematoma.Results All experimen tal auricles formed hematoma.The histopathological study showed that hematoma located between skin and cartilage,did not involve the cartilage.After 4 days,new-formed capillaries and fibroblasts were found,and then hematoma mostly absorbed; fibrous hyperplasia was been found.By cutting the hematoma,the blood clot could be thoroughly removed.Conclusions The auricular hematoma model can be established easily by striking with a heavy weight.Hematoma locates in subcutaneous connective tissue.A large hematoma should be early removed for prevention of auricular deformity.
