In investigating a patient’s acid-base status

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2022-08-07

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In investigating a patient’s acid-base status.

Venous rather than arterial blood should be studied.
Blood samples may be stored for up to 12 hours at room temperature before analysis.
pH can be calculated if [HCO3 ] and PCO2 are known.
Raised urinary ammonium salts suggest renal compensation for respiratory acidosis.
An early fall in [HCO3 ] suggests that the acid-base disturbance is respiratory in origin.

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safaTerkawi

2022-08-07

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A. False Only arterial blood is precisely regulated for [H].

B. False Analysis should be prompt; acid-base status is affected by blood cell metabolism.

C. True pH is a function of their ratio.

D. True Ammonia is secreted to buffer the hydrogen ions being excreted as the kidneys manufacture bicarbonate.

E. False A primary respiratory acid–base problem leads initially to an altered PCO2.

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