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
The development of nausea and increased upper abdominal bowel sounds after 24 hours of NG decompression in a patient with gastric outlet obstruction raises concerns for possible complications or changes in the patient's condition. Assessing the patient's vital signs, including blood pressure, heart rate, respiratory rate, and oxygen saturation, can provide important information about their circulatory status and overall stability.
While checking the patency of the NG tube is important, it is not the best immediate action in this situation. The nurse should first assess the patient's vital signs to ensure their stability before proceeding with further interventions.
Placing the patient in a recumbent position (lying down) or encouraging deep breathing and conscious relaxation may not address the underlying issue and could potentially exacerbate the symptoms. It is essential to assess the patient's vital signs and circulatory status to determine the appropriate course of action.
Correct Answer is ["A","B","C","D","E"]
Explanation
a. Considered primary treatment for small cell lung cancer (SCLC): Chemotherapy b. Used to prevent metastasis to the brain: Prophylactic cranial radiation
c. Electric current heats and destroys tumor cells: Radiofrequency ablation d. Best procedure for cure of lung cancer: Surgery
e. Medications that block molecules involved in tumor: Biologic and targeted
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