During the recent 20 years, we treated 30 hospitalized cases of spontaneoushemopneumothorax （SHPT） with completely satisfactory result. Closed intercostal drain-age with negative suction （-10cm H2O） was used. No obvious impairment of pulmonaryfunction was found in follow up for 3-16 years. We concluded that the mechanism ofSHPT is due to the abnormal movement of the diaphragm. Because the bleeding rate inSHPT is slow, so there should be enough time for defibrination without blood coagulationand close drainage becomes the method of choice. Thus operative intervention is not neces-sary, for the vast majority of cases.
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