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"Winters' Formula", named for Dr. R.W. Winters, is a formula used to evaluate respiratory compensation when analyzing acid-base disorders and a metabolic acidosis is present. It can be given as , where HCO3− is given in units of mEq/L and pCO2 will be in units of mmHg. Winters' formula gives an expected value for the patient's PCO2; the patient's actual (measured) PCO2is then compared to this. If the two values correspond, respiratory compensation is considered to be adequate. If the measured PCO2 is higher than the calculated value, there is also a primary respiratory acidosis. If the measured PCO2 is lower than the calculated value, there is also a primary respiratory alkalosis. ==Alkalosis== Note that Winter's formula pertains to settings of metabolic acidosis. To calculate the expected pCO2 in the setting of metabolic alkalosis, the following equations are used: * pCO2 = 0.7 () + 20 mmHg +/- 5 * pCO2 = 0.7 () + 21 mmHg 〔Hasan, Ashfaq. "The Analysis of Blood Gases." Handbook of Blood Gas/Acid-Base Interpretation. Springer London, 2013. pp. 253-266.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Winter's formula」の詳細全文を読む スポンサード リンク
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