普陀岛上有两行石刻的联句:“一日两度潮可听其自来自去,千山万重石莫笑他无知无觉。”海洋潮汐平均周期为12小时25分,故一日有两度潮。而这两度海潮与人的生命却有千丝万缕的联系。上海调查两所医院501例病人死亡时间,结果令人惊讶:60岁以上老年人病死时间,在落潮时的死亡率最高,涨潮和高潮时则降低;心、肺、肾、肝功能慢性衰竭而病死者,在落潮时竟高达80%,而涨潮时却很低;各种出血性病人(消化道出血、脑溢血、外伤出血、肺结核和肺癌咯血等)因出血致死的死亡时间,却在涨潮时为最高;尤为令人感兴趣的是,同为脑血管意外(中风)病人,出血者大多死于涨潮和高潮期。缺血性的则往往死于落潮期;心肌梗塞者绝大数死于涨潮期;其它急性病而致死者也均以涨潮期为最高。我国古代早就有“人与天地相参”的说法,现代“时辰生物学”的研究也建立已久。上海的这项研究揭示,在海上落潮和低潮时,要加强对慢性病人的护理和预防; Putuo Island, there are two lines of stone Lianliankan: “Tide twice a day to listen to their self-go, Qianshanwan Shi Mo laugh at his ignorance. ” The average tidal cycle of 12 hours and 25 minutes, so the first day There are two tide. And these two tides and people’s lives are inextricably linked. Shanghai investigated the death toll of 501 patients in two hospitals. The result was surprising: the death rate of the elderly over the age of 60 was highest at the time of ebb tide and lower at high tides and tides; and chronic failure of heart, lung, kidney and liver function The deceased were as high as 80% at low tide and low at high tide. The deaths due to bleeding in various hemorrhagic patients (gastrointestinal bleeding, cerebral hemorrhage, traumatic hemorrhage, tuberculosis and lung cancer, etc.) died at high tide Particularly, it is of particular interest that most patients with cerebrovascular accident (stroke) died mostly from high tides and high tides. Ischemic often die in the ebb tide; the vast majority of myocardial infarction died in the high tide; other acute cases were also caused by the highest tide period. In ancient China, there have long been “people and heaven and earth together”, modern “chronology” has also been established for a long time. This study in Shanghai revealed that in the ebb and flow of the sea, the care and prevention of chronic patients should be strengthened.