A nurse is providing care for a patient suffering from severe diarrhea. Which acid-base disorder is the patient at risk of developing?
Metabolic Alkalosis
Respiratory Alkalosis
Respiratory Acidosis
Metabolic Acidosis
The Correct Answer is D
Choice A rationale:
Metabolic alkalosis is a condition characterized by an increase in the pH of the blood due to an excess of bicarbonate (HCO3-) in the body. It is not typically caused by severe diarrhea. In fact, diarrhea can often lead to a loss of bicarbonate, which can contribute to metabolic acidosis.
Causes of metabolic alkalosis include: excessive vomiting, use of diuretics, and excessive intake of alkali such as antacids. Clinical manifestations of metabolic alkalosis include: muscle twitching, paresthesias, seizures, confusion, and lethargy.
Choice B rationale:
Respiratory alkalosis is a condition characterized by a decrease in the partial pressure of carbon dioxide (PaCO2) in the blood, leading to an increase in blood pH. It is caused by hyperventilation, which removes excess CO2 from the body. Severe diarrhea does not typically cause hyperventilation.
Causes of respiratory alkalosis include: anxiety, hyperventilation syndrome, high altitude sickness, and pulmonary embolism. Clinical manifestations of respiratory alkalosis include: lightheadedness, dizziness, paresthesias, palpitations, and tetany.
Choice C rationale:
Respiratory acidosis is a condition characterized by an increase in the partial pressure of carbon dioxide (PaCO2) in the blood, leading to a decrease in blood pH. It is caused by hypoventilation, which prevents the body from removing enough CO2. Severe diarrhea does not typically cause hypoventilation.
Causes of respiratory acidosis include: chronic obstructive pulmonary disease (COPD), pneumonia, asthma, and neuromuscular disorders.
Clinical manifestations of respiratory acidosis include: headache, confusion, somnolence, and coma.
Choice D rationale:
Metabolic acidosis is a condition characterized by a decrease in the pH of the blood due to an excess of acid in the body or a loss of bicarbonate. Severe diarrhea can lead to metabolic acidosis through several mechanisms:
Loss of bicarbonate in the stool: Diarrhea often contains a significant amount of bicarbonate, which can be lost from the body in large amounts during severe diarrheal episodes. This loss of bicarbonate can lead to a decrease in the blood's pH, resulting in metabolic acidosis.
Dehydration: Severe diarrhea can also lead to dehydration, which can concentrate acids in the blood and contribute to metabolic acidosis.
Lactic acidosis: In some cases, severe diarrhea can also cause lactic acidosis, a type of metabolic acidosis that occurs when there is a buildup of lactic acid in the body. This can happen due to impaired circulation or tissue hypoxia, which can occur as a complication of severe diarrhea.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
While verifying the suitability of the solution for a central line is important, it is not the immediate next step after insertion. Solutions that are incompatible with central lines can cause damage to the catheter or precipitate in the bloodstream, leading to serious complications. However, confirming placement takes priority to ensure the line is correctly positioned before any infusion is initiated.
Choice B rationale:
Double-checking medication calculations is a crucial safety measure, but it is not the most urgent step after central line insertion. Medication administration can only occur after confirming proper placement to avoid unintended infusion into incorrect sites or tissues, potentially leading to tissue damage or ineffective treatment.
Choice D rationale:
Initiating the prescribed infusion via the new access is the desired outcome, but it cannot be done before confirming placement. Infusing medications or fluids through a misplaced line can have severe consequences, such as:
Infiltration of medications into surrounding tissues, causing inflammation, pain, and potential necrosis.
Administration of medications into unintended areas, such as the pleural space or the vasculature of the head and neck, leading to potentially life-threatening complications.
Delay in the delivery of necessary medications or fluids if the line is not positioned correctly within the central venous system.
Choice C rationale:
Confirming placement with an x-ray is the essential next step to ensure the central line is in the correct position within the central venous system. This verification is crucial for several reasons:
Prevention of complications: Misplaced central lines can cause serious complications, such as pneumothorax (collapsed lung), hemothorax (blood in the pleural space), arrhythmias (irregular heartbeats), and nerve damage.
Accurate medication and fluid delivery: Proper placement ensures that medications and fluids are delivered directly into the central circulation, allowing for rapid and effective distribution throughout the body.
Safe and effective infusion: X-ray confirmation provides visual evidence of the line's position, guiding subsequent infusion practices and reducing the risk of errors.
Early identification of malposition: If the x-ray reveals a misplaced line, adjustments can be made promptly to prevent potential complications and ensure appropriate infusion.
Correct Answer is B
Explanation
Choice A rationale:
Massaging the site with scented oils is not recommended for pain relief after removal of a peripheral vascular access device. There is no evidence to support the effectiveness of scented oils in this context.
Additionally, some scented oils can be irritating to the skin, which could potentially worsen the pain, redness, and swelling.
It's crucial to use products that are specifically designed for wound care and pain management, and to follow the healthcare provider's instructions.
Choice B rationale:
Applying warm compresses to the site is an effective and recommended intervention to alleviate pain, redness, and swelling after removal of a peripheral vascular access device.
Warm compresses have the following beneficial effects:
Vasodilation: They promote blood flow to the area, which helps to reduce inflammation and pain. Muscle relaxation: The warmth helps to relax tense muscles, further easing discomfort.
Pain relief: Warmth can directly inhibit pain signals, providing a soothing sensation.
Increased circulation: Improved blood flow can help to remove inflammatory substances and promote healing. It's important to use a clean, warm compress and to apply it for 15-20 minutes at a time, several times a day.
Choice C rationale:
Topical lidocaine is a local anesthetic that can temporarily numb the skin.
While it can be used for pain relief, it's not typically the first-line intervention for pain associated with removal of a peripheral vascular access device.
Warm compresses are often preferred as they provide a more natural and non-invasive approach to pain management.
Choice D rationale:
Oral pain medication may be necessary if warm compresses do not provide adequate pain relief.
However, it's important to follow the healthcare provider's instructions regarding the type and dosage of pain medication to use.
Over-the-counter pain relievers, such as acetaminophen or ibuprofen, may be sufficient in some cases. Stronger prescription pain medication may be needed for more severe pain.
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