Mrs. Kalen is a 70 year old female who has arrived into the ER due to persistent vomiting for two days now. She appears to be lethargic and weak and has myalgia. She is noted to have dry mucus membranes and her capillary refill takes >4 seconds. She is diagnosed as having gastroenteritis and dehydration. Measurement of arterial blood gas shows pH 7.5, PaO2 85 mm Hg, PaCO2 40 mm Hg, and HCO3 34 mmol/L. What would you interpret the acid-base disorder to be?
Uncompensated Respiratory Acidosis
Fully Compensated Metabolic Acidosis
Uncompensated Metabolic Alkalosis
Partially Compensated Respiratory Alkalosis
The Correct Answer is C
The pH value of 7.5 indicates alkalosis, as it is above the normal range of 7.35-7.45. The elevated bicarbonate (HCO3-) level of 34 mmol/L suggests metabolic alkalosis, as it is higher than the normal range of 22-28 mmol/L. The PaCO2 level of 40 mm Hg falls within the normal range of 35-45 mm Hg.
In this case, the primary disturbance is metabolic alkalosis, which is likely caused by vomiting leading to excessive loss of gastric acid (hydrogen ions) and chloride ions from the stomach. This loss of acid and chloride results in an imbalance of electrolytes and an increase in bicarbonate levels, leading to metabolic alkalosis.
The arterial blood gas results do not indicate any compensation. Compensation occurs when the body attempts to restore the pH balance by adjusting the respiratory or metabolic systems. In this case, there is no compensation observed because the PaCO2 level is within the normal range and not significantly altered.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
During triage in a disaster situation, a color tagging system is often used to prioritize and categorize the injured based on the severity of their injuries and the urgency of medical attention required. The colors commonly used in triage are:
● Green tag: Minor injuries that are non-urgent and can typically wait for medical treatment.
● Yellow tag: Injuries that are significant but not immediately life-threatening, requiring medical attention within a few hours.
● Red tag: Critical injuries that are life-threatening but still salvageable with prompt medical intervention.
● Black tag: Injuries that are severe and unsurvivable or incompatible with life. This tag is assigned to individuals who are deceased or have injuries that are beyond the resources available for treatment.
In the given scenario, the absence of breathing, absent radial pulse, prolonged capillary refill, and unresponsiveness indicate a critical condition with no signs of life. Therefore, a black tag would be assigned to this individual.
Correct Answer is D
Explanation
The red tag is used to identify patients with critical injuries who require immediate medical attention. These individuals have life-threatening conditions that, with prompt medical intervention, have a higher chance of survival.
The triage color code system typically follows the following priority order:
1. Red tag: Immediate or emergent care needed for life-threatening injuries or conditions.
2. Yellow tag: Urgent care needed for significant injuries or conditions that are not immediately life-threatening.
3. Green tag: Non-urgent care needed for minor injuries or illnesses that can wait for medical treatment.
4. Black tag: Comfort care or deceased, as the injuries or conditions are incompatible with life or resources are not available for treatment.
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