A ground rule of dialysis support in the event of massive earthquake disaster is to perceive the necessity of evacuating patients quickly and to have a system fully equipped to collect information as to the situation of the designated disaster hospital in a region and other facilities and the capacity to take care of patients. Furthermore, building a network incorporating dialysis facilities in the neighboring areas is essential. Through this network, efforts have to be made to work out a practical dialysis support program without delay (annular support system). It is also important to create a support scheme which does not impose an excessively heavy burden on the staffs of damaged facilities. To put it concretely, the following measures should be taken:(1) to reduce the time needed for the transfer of patients to the mimimum;(2) to make the length of the patient's stay at a support facility the shortest possible;and (3) to get the data of dialysis patients ready and share the records with other dialysis facilities. To make the cooperative framework for tiding over a major earthquake disaster, it is important to establish the annular support system of dialysis facilities between the quake stricken area and its neighboring area. If a similar annular support system is not installed in many areas, cooperation does not function well. We must consider the ways and means to establish an ideal cooperative regional disaster prevention system in preparation of a large-scale earthquake, which may occur any time, while drawing a lesson from the previous earthquake disasters.

Increasing medical knowledge and improved hemodialysis techniques have permitted longer survival in patients receiving hemodialysis. However, the risk of cardiovascular disease, which is mainly caused by atherosclerosis, substantially increases in proportion to the longer survival of hemodialysis patients. At present, cardiovascular disease is a major cause of morbidity and mortality. The present study was designed to investigate the relations between electrocardiographic abnormalities (e.g. ischemic change, left ventricular hypertrophy, arrhythmia and conduction block) and the progression of atherosclerosis, the atherosclerotic risk factors (e.g. diabetes, hypertension, hyperlipidemia and smoking) and aortic calcification in patients on maintenance hemodialysis. Pulse wave velocity (PWV) was used as the index of atherosclerosis. PWV levels were singficantly higher in ischemic change (1,993±99cm/s), left ventricular hypertrophy (2,103±120cm/s), arrhythmia (2,015±120cm/s), and condition block groups (2,014±119cm/s) than in the nomal group (1,627±69cm/s). Also, PWV levels corrected by diastolic blood pressure in all abnormal groups were significantly higher. Serum Creactive protein levels in all abnormal groups also tended to be higher than those in the normal group. With regard to atherosclerotic risk factors, the incidence of diabetes and hypertention tended to be higher in abnormal groups. Especially the incidence of hypertension was significantly higher in ischemic change (66.7%), left ventricular hypertrophy (50.0%) and conduction block groups (55.6%) than that in the normal group (16.7%). These results suggest that the electrocardiographic changes are related to the progression of atherosclerosis, and among atherosclerotic risk factors, hypertension most affects the electrocardiographic changes in patients on maintenance hemodialysis.
Hemodialysis ; Atherosclerosis ; seconds ; Ventricular hypertrophy ; Hypertension induced by pregnancy

Ischemic peripheral circulatory disorders have been observed more and more frequently in maintenance hemodialysis patients in recent years. This tendency is associated with the progression of arteriosclerosis characteristic of such patients. In the present study, we made inquiries about the presence or absence of subjective symptoms of ischemic peripheral circulatory disorders in maintenance hemodialysis patients and examined pulsation of dorsal artery and cyanosis of foot to make early diagnosis of the circulatory disorders possible. Furthermore, we measured the ankle brachial pressure index (API) and examined the calcification in thoracic and abdominal aortae on X-rays. According to clinical symptoms, the subjects were classified into no clinical symptom, sensory disorder, and motor disorder. Of the participants in the present study, 31.0% had API below 1.0. The mean age and hemodialysis period of the patients with API below 1.0 were more than those of the patients with API 1.0 or over. However, the differences were not significant. Of the patients with no clinical symptom, 21.2% had API below 1.0. We found a patient with no clinical symtom who had no pulsation of dorsal artery and cyanosis of foot. Of the patients who complained sensory and motor disorders, 35.0% and 45.5%, respectively, had API below 1.0. In the examination of calcification of thoracic and abdominal aortae, 23.8% of the patients with no calcification, 22.2% of the patients with the calcification in thoracic aorta alone, 27.8% of the patients with the calcification in abdominal aorta alone, and 29.6% of the patients with the calcification in both thoracic and abdominal aortae had API below 1.0. We believe that these results will make for early diagnosis and care treatment of ischemic peripheral circulatory disorders in hemodialysis patients.