Anewlypostedjuniordoctorhaddifficultyinfindingoutbasedeficit/excessforbloodinagivenpatient.Anexperienced senior resident advised a quick method to determine acid-base composition of blood-based on pCO2. Which of the following is the likely method he suggested to predict acid base composition of blood: (A) Red ford nomogram, (B) DuBio's nomogram, (C) Goldman constant field equation, (D) Siggard-Andersen nomogram
Answer is D. Siggard-Anderson nomogram: plots the acid-base charecteristics of aerial blood PCO2 is placed on the veical axis and pH on the horizontal axisVeical line through pH 7.40: any point to the left denotes acidosis & any point to right denotes alkalosisHorizontal line through p CO2 of 40 mmHg: point above or below this line defines the effective degree of hypo or hyperventilationRef: Ganong 19/e p703 fig 39.8