Abstract 10003: Triple Disasters Induced High Incidence of Deep Vein Thrombosis in Fukushima: How Did Mega-Earthquake, Tsunami and Nuclear Plant Accident Affect the Evacuees in Japan?
OBJECTIVES: Mega-earthquake, tsunami and nuclear power plant accident hit Fukushima, Japan on March 11th, 2011. The tsunami swept away thousands of homes on the shore. In addition, Fukushima-Daiichi nuclear power plant disseminated massive radioactive substances, was forcing thousands of people in the neighborhood to take refuge at remote shelters over 2 months. It is known that post-disaster fatal pulmonary thromboembolism is highly associated with deep vein thrombosis (DVT). We herein report our post-disaster DVT survey and prevention operation for evacuees in Fukushima disaster.
METHODS: From March 28 to May 11 in 2011, ultrasound examination of deep veins below knee was performed on 2,238 evacuees in the shelters by “Advanced Disaster Medical Team of Fukushima Medical University”. The quality of shelter was assessed according to CDC (Centers for Disease Control) shelter assessment tool. The condition of evacuees varied depending on each refugee shelter such as school gym or public facilities. Generally, the utilities such as water, electronic, or gas were cut off during the survey. The food supply was inadequate. The latrines were installed outside of the shelters in the cold environment. Most evacuees slept on the floor mattress.
RESULTS: The overall incidence of DVT was 9.8% (219/2238). Most of the DVTs(94.4%)were identified as chronic and mural in the soleus or gastrocnemius veins. The incidence of DVT at the shelters near Tsunami area was extremely high (35%). The incidence was higher in evacuees from Tsunami area than those from nuclear power plant accident (13.3% vs. 7.5%: P<0.0001). Fresh fulfilled thrombi were observed in 11 evacuees (11/219: 5.6%), who were transferred to hospitals for intensive treatment. A correlation between the quality of shelter and the incidence of DVT was noticed (r2=0.05, P=0.05).
CONCLUSIONS: According to the first experience of triple disaster in human history, high incidence of DVT was demonstrated among more than 2,000 evacuees in Fukushima. The incidence was associated with the cause of evacuation and quality of shelter. Further analysis with long-term follow-up is mandatory for better understanding of post-disaster pathophysiology caused by natural disaster complicated with modern nuclear technology.
- © 2012 by American Heart Association, Inc.