In a patient pO2 is 85 mmHg, pCO2 is 50 mmHg, pH is 7.2, and HCO3- is 36mmol/L. The condition is
**Question:** In a patient with pO2 of 85 mmHg, pCO2 of 50 mmHg, pH of 7.2, and HCO3- of 36mmol/L. The condition is:
A. Acidosis
B. Alkalosis
C. Hypercapnia
D. Hypoxia
**Correct Answer:** C. Hypercapnia
**Core Concept:**
The provided patient's laboratory values involve measurements of oxygen and carbon dioxide levels in the blood. These measurements are essential in assessing the acid-base balance and gas exchange in the respiratory system.
**Why the Correct Answer is Right:**
The correct answer is Hypercapnia (option C), as the patient's partial pressure of carbon dioxide (pCO2) is elevated at 50 mmHg. Hypercapnia occurs when there is an excess of carbon dioxide in the blood, which leads to a decrease in pH, as carbon dioxide is a strong acid that contributes to the acid-base balance. In this scenario, the elevated pCO2 indicates impaired respiratory function or ventilation-perfusion mismatch, which results in an increase in CO2 levels.
**Why Each Wrong Option is Incorrect:**
A. Acidosis (option A) is incorrect because despite the elevated pCO2, the given pH (7.2) is within the normal range (7.35-7.45). Acidosis occurs when the pH is below the normal range, which has not been the case in this scenario.
B. Alkalosis (option B) is incorrect because the pH is not elevated, which is the defining feature of alkalosis. The pH of 7.2 indicates mild acidemia, not alkalemia.
D. Hypoxia (option D) is incorrect because the patient's pO2 (85 mmHg) is within the normal range (80-100 mmHg). Hypoxia occurs when there is a decrease in oxygen saturation, which is not the case in this scenario.
**Clinical Pearl:**
In this case, the patient's elevated pCO2 levels (50 mmHg) suggest a respiratory issue, such as lung disease or ventilation-perfusion mismatch. Further evaluation and management would depend on the underlying cause of the hypercapnia, but addressing the primary issue should ultimately improve the patient's condition.