MSN 611 : Clinical Pharm & Intervention for APRNs - NKU

Correct Answer:

B - vomiting and pain.

Explanation of the Correct Answer:

A small bowel obstruction (SBO) typically presents with a combination of nausea, vomiting, and pain. The obstruction causes a backup of intestinal contents, leading to increased pressure in the bowel and difficulty with normal passage of food and fluids. The patient will experience colicky pain (sharp, intermittent pain) as the bowel attempts to move the obstructed contents. Vomiting often occurs due to the backup of contents and the body's attempt to expel the obstructed material.

Why the Other Options Are Incorrect:

A - Nausea and diarrhea:

Diarrhea is not a typical symptom of a small bowel obstruction. In fact, patients often experience constipation or inability to pass gas due to the obstruction. While nausea is a common symptom, the presence of diarrhea is more indicative of other gastrointestinal conditions like infections or inflammatory bowel diseases rather than an obstruction.

C - Sudden onset of severe pain:

While patients with a small bowel obstruction may experience pain, it typically develops over time and is characterized by intermittent colicky pain rather than a sudden onset of severe pain. Severe pain that comes on suddenly could indicate other conditions such as mesenteric ischemia or perforation, which require immediate attention.

D - Hematochezia:

Hematochezia (the passage of fresh blood in the stool) is not typically associated with a small bowel obstruction. This symptom is more commonly seen in conditions involving the colon or rectum, such as hemorrhoids, anal fissures, or colorectal cancer, but not in small bowel obstructions.

Correct Answer:

C - of average weight.

Explanation of the Correct Answer:

Individuals with bulimia nervosa often engage in episodes of binge eating followed by compensatory behaviors like purging (e.g., vomiting, excessive use of laxatives), fasting, or excessive exercise to prevent weight gain. Despite the focus on weight control, individuals with bulimia may not be significantly underweight. In fact, many patients with bulimia are of average weight or slightly overweight, but they still perceive themselves as being overweight and are highly concerned with body image. As a result, average weight is the most typical presentation of someone with bulimia, although they may fluctuate in weight due to the binge-purge cycle.

Why the Other Options Are Incorrect:

A - Very overweight:

While some individuals with bulimia may be overweight, this is not the most common characteristic. People with bulimia are often at average weight or may even appear underweight at times, particularly if they are engaging in purging behaviors or extreme dieting between binge episodes. It is less likely for someone with bulimia to be very overweight, as they usually maintain a focus on controlling their weight through purging.

B - Very underweight:

Although very underweight individuals can have eating disorders, bulimia nervosa is characterized by the binge-purge cycle, and patients are typically not as severely underweight as those with anorexia nervosa. Bulimia often involves compensatory behaviors to avoid significant weight gain, which means these individuals are more likely to be within normal weight ranges rather than extremely underweight.

D - Not concerned with weight:

This is incorrect, as people with bulimia are highly concerned with their weight and often experience significant disturbance in body image. The key feature of bulimia is the obsession with weight and shape, even if the individual is at a normal or slightly above-average weight.

Correct Answer:

C - Pertussis lasts approximately 1-2 weeks.

Explanation of the Correct Answer:

Pertussis, also known as whooping cough, typically lasts much longer than 1-2 weeks. The disease generally progresses in stages and can last for several weeks to months. The disease's duration is divided into three phases:

Catarrhal phase (1-2 weeks) - This phase resembles a common cold, with symptoms like runny nose, sneezing, and mild cough.

Paroxysmal phase (2-6 weeks) - This phase is marked by severe coughing spells (paroxysms), which can lead to a "whooping" sound during inhalation.

Convalescent phase (weeks to months) - The coughing gradually decreases, but it may take weeks or even months for the cough to resolve completely.

Therefore, pertussis lasts much longer than 1-2 weeks, making this statement incorrect.

Why the Other Options Are Correct:

A - Antibiotics can help reduce the spread of the infection to others:

This statement is correct. Antibiotics such as azithromycin or erythromycin can reduce the spread of pertussis, particularly if administered early in the course of the illness. They are also effective in treating the bacterial infection and can help shorten the duration of symptoms if given early.

B - Pertussis begins with symptoms similar to the common cold:

This statement is correct. The early phase of pertussis often resembles a common cold, with mild symptoms such as a runny nose, sneezing, low-grade fever, and a mild cough. This phase is called the catarrhal phase and can last for 1-2 weeks.

D - Pertussis can occur in all patients of all ages:

This statement is correct. While pertussis is particularly dangerous for infants and young children, it can affect individuals of any age, including adolescents and adults. However, adults may experience milder symptoms or be unaware they have pertussis, which can result in it being spread to others, especially vulnerable populations.

Correct Answer:

D - Ramelteon.

Explanation of the Correct Answer:

Ramelteon is a melatonin agonist used as an anxiolytic, sedative, and hypnotic. It specifically targets melatonin receptors (MT1 and MT2) in the brain, which are involved in regulating the sleep-wake cycle. By binding to these receptors, ramelteon helps to promote sleep onset, making it effective for the treatment of insomnia, particularly in patients who have difficulty falling asleep. Unlike other sedatives, ramelteon does not have the addictive potential associated with benzodiazepines or other hypnotics.

Why the Other Options Are Incorrect:

A - Flurazepam:

Flurazepam is a benzodiazepine used to treat insomnia, particularly for sleep onset and maintenance. It does not act as a melatonin agonist. Instead, it enhances the effects of the neurotransmitter gamma-aminobutyric acid (GABA), which has inhibitory effects on the central nervous system.

B - Phenobarbital:

Phenobarbital is a barbiturate that acts as a central nervous system depressant. Like benzodiazepines, it enhances GABAergic activity but does not act as a melatonin agonist. It is not typically used for anxiety or insomnia due to its potential for dependence and side effects.

C - Zolpidem:

Zolpidem is a non-benzodiazepine hypnotic that works by enhancing GABAergic activity in the brain. It is commonly used for short-term treatment of insomnia, particularly for helping patients fall asleep. However, it does not act on melatonin receptors and is not a melatonin agonist.

Correct Answer:

A. Hold and decrease dose of, or discontinue mexiletine

Explanation of the Correct Answer:

Mexiletine is a class 1b antiarrhythmic used to treat ventricular arrhythmias. One of the known adverse effects of mexiletine is tremor, particularly in the hands, which may occur as a side effect of the drug. This can present as bilateral rest tremors, which the patient is experiencing.

Given the timing (the tremors developed after starting mexiletine) and the absence of other concerning neurological symptoms (e.g., no gait disturbance or other Parkinsonian features), the best next step is to hold and decrease the dose or discontinue mexiletine. In many cases, reducing the dose or stopping the medication resolves the tremors.

Why the Other Options Are Incorrect:

B. Initiate a trial of beta-blockers:

Beta-blockers are commonly used for arrhythmias, but they are not the treatment of choice for tremors associated with mexiletine. They may not address the root cause of the tremor, which is related to the drug itself. A better approach would be to adjust the medication causing the issue.

C. Order brain imaging to rule out neurological disease:

While Parkinson’s disease or other neurological conditions could cause tremors, this patient’s tremors are more likely related to mexiletine. Given the timing of symptom onset (after starting mexiletine), and the absence of additional neurological signs or symptoms, ordering brain imaging is unnecessary at this stage.

D. Start levodopa therapy for Parkinson’s disease:

Levodopa is a treatment for Parkinson's disease, but there is no evidence here to suggest that this patient has Parkinson's. The tremors are most likely due to the mexiletine and not a neurodegenerative condition. Starting levodopa is inappropriate without a formal diagnosis of Parkinson’s disease.

Correct Answer:

B - usually diagnosed based on physical assessment.

Explanation of the Correct Answer:

Varicosities are typically diagnosed through physical assessment. The diagnosis is primarily based on the appearance of the veins in the lower extremities, which are often visible as dilated, tortuous veins. A clinician can usually identify varicose veins during a routine physical examination by inspecting the legs for swollen veins and may also assess for signs of chronic venous insufficiency. In some cases, additional tests like Doppler ultrasound may be used to assess the blood flow and valve function within the veins, but the diagnosis is generally made clinically.

Why the Other Options Are Incorrect:

A - most likely due to congenital valve deformities:

While congenital valve deformities can lead to varicosities, they are not the most common cause. The majority of cases are due to acquired valve dysfunction and venous insufficiency over time, often associated with aging, prolonged standing, obesity, or pregnancy.

C - indicative of an underlying cardiovascular disease:

Varicosities are a vascular issue rather than a cardiovascular disease. While they may be associated with venous insufficiency or other vascular conditions, they are not typically a sign of cardiovascular disease (such as coronary artery disease or heart failure). This makes option C less accurate.

D - more symptomatic during ovulation:

Although hormonal fluctuations during ovulation may exacerbate symptoms of varicose veins, this is not a defining characteristic of varicosities. The primary issue is chronic venous insufficiency and venous hypertension, not necessarily the timing within the menstrual cycle.

Correct Answer:

A. Bevacizumab

Explanation of the Correct Answer:

Bevacizumab is a monoclonal antibody that is commonly used in the treatment of metastatic colon cancer. It works by inhibiting vascular endothelial growth factor (VEGF), which plays a key role in tumor angiogenesis (the formation of new blood vessels). By inhibiting VEGF, bevacizumab reduces the blood supply to the tumor, thereby limiting its growth and metastasis. It is typically used in combination with chemotherapy agents such as 5-fluorouracil (5-FU) to treat metastatic colorectal cancer.

Why the Other Options Are Incorrect:

B. Methotrexate

Methotrexate is an antimetabolite that inhibits dihydrofolate reductase and is used in the treatment of various cancers (e.g., leukemia, lymphoma) and autoimmune diseases (e.g., rheumatoid arthritis). However, it is not typically used in the treatment of metastatic colon cancer.

C. Cyclophosphamide

Cyclophosphamide is an alkylating agent used in the treatment of various cancers, such as lymphoma, leukemia, and breast cancer. It is not a first-line treatment for metastatic colon cancer and is not used in this context.

D. Doxorubicin

Doxorubicin is an anthracycline chemotherapy drug that is effective for several cancers, including breast cancer, lymphoma, and sarcoma. However, it is not a standard treatment for metastatic colon cancer and is not used in this context.

Correct Answer:

A - Positive McMurray's test

Explanation of the Correct Answer:

A positive McMurray's test is a classic physical exam finding that suggests a torn meniscus, particularly in the knee. In this maneuver, the examiner flexes and rotates the knee while applying a valgus or varus stress. A palpable or audible click, pain, or locking sensation during this movement is indicative of a meniscal tear. This test is specifically designed to detect damage to the meniscus, and a positive result strongly supports the clinical suspicion of a torn meniscus after a twisting injury, such as what commonly occurs during basketball.

Why the Other Options Are Incorrect:

B - Positive anterior drawer test:

A positive anterior drawer test indicates anterior cruciate ligament (ACL) injury, not a meniscal tear. It tests for anterior displacement of the tibia relative to the femur, suggesting ligamentous instability rather than meniscal pathology.

C - Audible click at the joint line:

While an audible click may occur with a meniscus tear, clicking alone is not specific enough without other supporting tests like the McMurray's. Clicking can also happen in conditions like patellar tracking disorders or loose bodies within the joint, so it is not as definitive as a positive McMurray's test.

D - Fixed patellar subluxation:

Patellar subluxation involves the displacement of the kneecap from its normal position and typically results from patellofemoral instability rather than a meniscal tear. A torn meniscus does not typically cause fixed patellar subluxation.

Correct Answer:

C - a friable cervix.

Explanation of the Correct Answer:

A friable cervix refers to a cervix that is easily irritated, inflamed, or bleeds with minimal manipulation. This finding is particularly concerning in a postmenopausal woman because it may indicate an underlying pathological condition, such as cervical cancer or other malignancies, rather than just a benign condition related to menopause (like atrophic vaginitis). In the context of postmenopausal symptoms like pruritus (itching) and painful intercourse, the presence of a friable cervix warrants further investigation to rule out more serious conditions.

Why the Other Options Are Incorrect:

A - Pale, dry vaginal mucosa:

This is a common finding in postmenopausal women due to a decrease in estrogen levels. It is typically associated with atrophic vaginitis and may lead to symptoms like pruritus and painful intercourse, but it is not as concerning as a friable cervix, which could indicate malignancy.

B - Absence of vaginal rugae:

The loss of vaginal rugae (the folds in the vaginal lining) can occur as a result of decreased estrogen after menopause. While it can contribute to vaginal dryness and discomfort, it is not immediately concerning in isolation and is considered a typical finding in postmenopausal women.

D - Raised yellowish cervical lesions:

While yellowish lesions on the cervix could be suggestive of cervical polyps or other benign conditions, they are not as concerning as a friable cervix. Raised lesions would typically be evaluated further, but friability is a more urgent finding that requires immediate investigation for potential malignancy.