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稳态变化适量调整是人体生理学中的普遍现象,适量调整能力是人体赖以生存的基本能力之一。适量调整能力不是无限的,它的最大容许限度标志着稳态和稳态破坏的质变临界状态。人体对任何一种内外因素的作用都有一个适量调整范围,或称容许限度,在大多数情况下它是一个恒定的阈值,然而不是绝对的,有时是相对的。我们临床工作者除要掌握一般常见临界值以外,还要掌握某些相对临界值,因为后者在实际工作中并不少见。临界值的差异除了年龄、性别等个体差异之外,至关重要的是作用因素的量与时间两者关系所决定的个体适应与不适应之间的差异。实际上这种差异可因慢性适应而使得适量调整能力成倍地增加。所以,某些临界值在特定情况下,其本身就是个相对可变的量。在引起颅压增高的各种生理及病理性因素中,仅生理性增加腹压就可以使颅内压升高到相当于颅内20毫升血肿占位的程度。在适量调整范围内,人体对作用因素
The right amount of adjustment of steady-state changes is a common phenomenon in human physiology, the right amount of adjustment ability is one of the basic abilities that the human body depends on to survive. The right amount of adjustment is not unlimited, and its maximum allowable limit marks the critical state of steady-state and steady-state damage. The human body has an appropriate amount of adjustment, or tolerance, on the role of any internal or external factor. In most cases it is a constant threshold, but not absolute and sometimes relative. In addition to having a common threshold, clinicians should also have some relative threshold, as the latter is not uncommon in practice. In addition to individual differences such as age and gender, it is critically important that differences in thresholds be the discrepancies between individual adaptation and incompetence as determined by the relationship between the amount and time of the agent. In fact, this discrepancy may be exponentially increased due to chronic adaptation. Therefore, some thresholds are themselves relatively variable quantities under certain conditions. In a variety of physiological and pathological factors that cause increased intracranial pressure, only physiological increase in abdominal pressure can make intracranial pressure increased to the equivalent degree of intracranial hematoma 20 ml. In the right amount of adjustment, the human body on the role of factors