The Science Journal of the American Association for Respiratory Care

2008 OPEN FORUM Abstracts

A NATION-WIDE CHRONOLOGICAL, STATISTICAL AND EPIDEMIOLOGICAL STUDY OF HMV IN JAPAN.

Toshihiko Agata1



Background: The reliable epidemiological statistics in detail for HMV (Home Mechanical Ventilation) in Japan is uncertain now. The most common reasons for HMV were respiratory failures. They were SAS (sleep apnea syndrome), COPD (chronic obstructive pulmonary disease) and etc. So we did nation-wide epidemiological survey of HMV to make clear the real situation of HMV in Japan in 1998, 2001, 2004 and 2007. We surveyed on divisions of internal medicine and respiratory medicine. We made the criteria of diagnosis for first (epidemiological) survey and personal questionnariee for secondary survey.

Methods: The members of the committee of epidemiology of intractable disease in the Ministry of Health, Welfare and Labor did the first survey to make clear of incidence and prevalence of HMV. And the members of the committee of pulmonary insufficiency syndrome in the Ministry of Health, Welfare and Labor did the secondary survey to know epidemiological and clinical information of the patients.

Results: We made estimation by the mail surveys that the patients with HOT(Home Oxygen Therapy) were 124 thousands, those with NCPAP(Nasal Continuous Positive Airway Pressure) were 12 thousands, those with NPPV(Noninvasive Positive Pressure Ventilation) at home were 7.9 thousands, those with NPPV in hospitals were 3.0 thousands, those with TPPV(Tracheal Intermittent Positive Pressure Ventilation) at home were 2.5 thousands and those with TPPV in hospitals were 5.8 thousands by hyper geometric distribution in the 2001 survey. And from the 2004 survey, we estimate patients with HOT are 145 thousands, those with NCPAP are 15 thousands, those with NPPV at home are 10 thousands, those with NPPV in hospitals are 5 thousands, those with TPPV at home are 4 thousands and those with TPPV in hospitals are 7 thousands. But the 2004 survey is undergoing now. So it will be finished, the number of patients of the diseases may be changed. And from the 2007 survey, we estimate patients with HOT and NCPAP were decreased.

Conclusion: The patients with HMV are changing on account of many factors.