Medical surgical Exam 1 (NSG 123)

The correct answer is C. MRI.

Rationale:

Coronary artery disease (CAD) is often diagnosed and evaluated using a variety of noninvasive tests. One of the most common noninvasive diagnostic methods used to assess cardiac changes, including those associated with CAD, is magnetic resonance imaging (MRI). An MRI can provide detailed images of the heart's structure and function, helping to identify areas of the heart that may be affected by ischemia or damage from poor blood supply due to CAD.

Explanation of the other options:

A. Cardiac biopsy: A cardiac biopsy is an invasive procedure in which a small sample of heart tissue is taken for examination. It is typically used to evaluate inflammatory conditions or infections affecting the heart, rather than being used to diagnose CAD.

B. Cardiac catheterization: While cardiac catheterization is a common invasive procedure used to evaluate the coronary arteries, it is not noninvasive. It involves threading a catheter through the blood vessels to the heart to check for blockages or narrowing in the coronary arteries. However, in this question, we are looking for a noninvasive method.

D. Pericardiocentesis: This is an invasive procedure used to remove excess fluid from the pericardium (the sac surrounding the heart). It is typically performed when there is fluid accumulation due to pericarditis or other conditions, but it is not used to diagnose coronary artery disease.

Summary:

For a noninvasive diagnostic method to evaluate cardiac changes associated with coronary artery disease, an MRI (option C) would be the most appropriate choice.

Correct Answer: A. pH depends on the concentration of hydrogen ions in blood.

Explanation of the Correct Answer:

The pH of the blood is a measure of the acidity or alkalinity of the blood, and it is directly related to the concentration of hydrogen ions (H+) in the blood. As the concentration of hydrogen ions increases, the pH decreases, making the blood more acidic. Conversely, a decrease in hydrogen ion concentration raises the pH, making the blood more alkaline (basic).

Why the Other Options Are Incorrect:

B. pH depends on serum potassium level.

Although potassium levels affect the function of cells, including those in the heart and muscles, they do not directly determine the pH of the blood. Potassium is more involved in cellular function and electrolyte balance rather than directly affecting blood acidity or alkalinity.

C. pH depends on the amount of oxygenated blood.

While oxygen levels in the blood can influence overall metabolic processes, the pH is not directly dependent on oxygen saturation. Oxygenated blood is important for tissue function, but pH is primarily regulated by the concentration of hydrogen ions, not oxygen levels.

D. pH depends on serum magnesium level.

Serum magnesium levels play a role in various enzymatic processes and muscle function, but they do not directly influence the blood pH. Magnesium imbalances can lead to other issues such as muscle weakness, but they are not a primary determinant of blood acidity or alkalinity.

Summary:

The pH of the blood is determined by the concentration of hydrogen ions in the blood. An increase in hydrogen ion concentration results in a lower pH (more acidic), while a decrease in hydrogen ion concentration results in a higher pH (more alkaline). Other factors like potassium, oxygen, and magnesium levels do not directly affect the pH of the blood.

Correct Answer: B. Fluid volume deficit

Explanation 

The nurse should recognize the signs as indicating fluid volume deficit. The following findings support this conclusion:

Low blood pressure (BP of 90/60 mm Hg): This suggests that the client may not be maintaining adequate circulating volume, which is a common sign of fluid volume deficit.

Tachycardia (pulse of 118): The elevated heart rate is a compensatory mechanism for low blood volume or low blood pressure, which often occurs in cases of fluid volume deficit.

Dark yellow urine and low urine output (22 mL in the past hour): These findings are indicative of dehydration or low fluid volume. The kidneys conserve water in response to reduced circulating volume, which leads to concentrated, dark urine and decreased urine output.

High urine specific gravity (1.035): A specific gravity greater than 1.030 typically indicates concentrated urine, which occurs when the kidneys are trying to conserve water due to insufficient fluid intake or volume depletion.

Why the Other Options Are Incorrect:

A. Acute kidney failure

While reduced urine output can be a sign of acute kidney failure, the findings in this scenario are more indicative of a fluid volume deficit rather than kidney failure. In acute kidney failure, urine output is often either absent (anuria) or severely decreased, and additional diagnostic tests (e.g., elevated creatinine or BUN) would be required to confirm this diagnosis.

C. Fluid volume excess

Fluid volume excess would lead to symptoms such as elevated blood pressure, edema, and a low urine specific gravity due to the kidneys' inability to excrete excess fluid. The client's low blood pressure, low urine output, and high specific gravity suggest that they are not experiencing fluid retention but rather a fluid deficit.

D. Diabetes Insipidus

Diabetes insipidus is characterized by a large volume of dilute urine with low specific gravity, which is not consistent with this client's presentation. In diabetes insipidus, the body is unable to concentrate urine due to a deficiency in antidiuretic hormone (ADH) or a resistance to it, leading to excessive urination. This client's dark yellow urine and high specific gravity indicate that the kidneys are conserving water due to low fluid volume, which is inconsistent with diabetes insipidus.

Summary:

The client is showing signs of fluid volume deficit, including low blood pressure, tachycardia, dark yellow urine, low urine output, and high urine specific gravity. These findings suggest the body is compensating for fluid loss by conserving water. Acute kidney failure, fluid volume excess, and diabetes insipidus are less likely based on these specific symptoms.

Correct Answer: C. I will only drink fluid when I eat my meals.

Rationale:

The patient’s statement that she will only drink fluid when she eats her meals indicates a lack of understanding about the importance of consistent fluid intake throughout the day. Proper hydration is essential for bladder health, and drinking too little fluid can lead to concentrated urine, which can irritate the bladder and potentially worsen incontinence symptoms. The patient should be encouraged to drink regularly throughout the day, not just with meals, to help maintain adequate hydration and support normal bladder function.

Why the Other Options Are Correct:

A. "I drink 8 oz. of fluid on the even hours while awake." This statement indicates that the patient is trying to maintain consistent hydration, which is appropriate for managing incontinence. Spacing out fluid intake throughout the day helps prevent large volumes of urine from being produced all at once, which can reduce pressure on the bladder.

B. "I will attempt to void 30 minutes after drinking 200 cc. of fluid." This approach reflects the concept of timed voiding, which is an effective strategy for managing incontinence. Voiding at scheduled times helps prevent accidents and reduces the risk of urinary retention.

D. "I will set the timer to remind me when to void." Using a timer for regular voiding is another strategy known as scheduled voiding or bladder training. This helps the patient avoid waiting too long between bathroom visits, which can help prevent accidents and improve bladder control.

Summary:

The correct answer is C because the patient should not restrict fluid intake to meal times. Regular fluid intake throughout the day is necessary for maintaining bladder health. The other statements reflect appropriate strategies for managing incontinence after a hysterectomy, including timed voiding, regular hydration, and setting reminders for scheduled bathroom visits.

The correct answer is B. Impaired physical mobility.

Rationale:

The signs and symptoms of impaired coordination, decreased muscle strength, limited range of motion, and reluctance to move all point to impaired physical mobility. This nursing diagnosis reflects limitations in the ability to move or perform physical activities due to factors such as physical, mental, or emotional constraints.

Why the other options are less appropriate:

A. Health-seeking behaviors: This diagnosis refers to a pattern of behavior in which the patient actively seeks measures to improve their health, which is not reflected by the symptoms described.

C. Disturbed sensory perception: This diagnosis involves abnormalities in one or more of the senses (e.g., sight, hearing, touch), but the symptoms described do not relate to sensory disturbances

D. Deficient knowledge: This diagnosis would apply if there were evidence of the patient not understanding health information or treatment needs. The symptoms provided focus on physical limitations, not knowledge deficits.

Summary:

The described signs and symptoms best fit the nursing diagnosis of impaired physical mobility, as they indicate difficulty with physical movement and mobility.

Correct Answer: B) Allergens and radiation

Rationale:

External factors that subject the skin to injury include physical, chemical, and environmental agents that can damage or weaken the skin's protective barrier.

Allergens: Cause irritation, inflammation, and allergic reactions (e.g., contact dermatitis from chemicals, pollen, or latex).Weaken skin integrity, making it more prone to injury.

Radiation: Ultraviolet (UV) radiation from the sun causes burns, DNA damage, and skin cancer. Medical radiation therapy can lead to radiation burns, increased skin sensitivity, and delayed wound healing.

Why the Other Options Are Incorrect:

A) Emaciation and infections 

Emaciation (extreme thinness) results in fragile skin, but it is an internal factor (related to nutrition and body condition). Infections occur when the skin is already compromised; they do not initially cause injury but worsen existing damage.

C) Radiation and emaciation

Radiation is external, but emaciation is an internal factor, making this answer partially incorrect.

D) Allergens and infections

Allergens are external irritants, but infections result from internal factors like weakened immunity or bacterial exposure. Infections are a consequence, not a primary cause, of skin injury.

Summary:

External factors include allergens and radiation, which directly damage the skin. Emaciation and infections are internal factors, affecting skin integrity indirectly.

The correct classification for pneumonia in a client receiving home infusion therapy is: Health care-associated pneumonia (HCAP)

Explanation:

Health care-associated pneumonia (HCAP) refers to pneumonia that occurs in patients who have had extensive contact with the healthcare system, such as those receiving home infusion therapy, long-term care, or recent hospitalizations. Even though the patient is not in the hospital at the time of diagnosis, their exposure to healthcare settings puts them at a higher risk for developing infections with more resistant organisms typically associated with healthcare settings.

Why the Other Options Are Incorrect:

Community-acquired pneumonia (CAP): This type of pneumonia is acquired outside of any healthcare setting. The client’s involvement with healthcare services (e.g., home infusion therapy) excludes it from this classification

Hospital-acquired pneumonia (HAP): This type of pneumonia develops 48 hours or more after admission to a hospital. Since the client is receiving care at home, it does not fit the definition of hospital-acquired pneumonia.

Ventilator-associated pneumonia (VAP): This type of pneumonia occurs in patients who are on mechanical ventilation for more than 48 hours. Since there is no mention of the client being on a ventilator, this classification does not apply.

Summary:

Since the client is receiving home infusion therapy and has a known healthcare-related background, the pneumonia would be classified as health care-associated pneumonia (HCAP).

Correct Answer: B. The patient appears confused.

Rationale:

Confusion in a patient with a fractured femur may indicate a serious complication, such as fat embolism syndrome (FES), hypoxia, or shock. Fat embolism syndrome (FES) occurs when fat droplets from the bone marrow enter the bloodstream, potentially causing neurological symptoms, respiratory distress, and petechiae. Other warning signs include restlessness, agitation, respiratory distress, and a sudden decline in mental status. This requires immediate medical intervention to prevent worsening complications.

Explanation of Incorrect Options:

A. The patient complains of pain.

Pain is expected with a fracture and should be managed, but it is not immediately life-threatening like confusion. However, severe, unrelieved pain despite medication could indicate compartment syndrome, which would require immediate intervention.

C. The patient's blood pressure is 136/88.

This blood pressure is mildly elevated but not critically abnormal. It does not require immediate reporting unless there is a significant trend of worsening vital signs.

D. The patient voided using the bedpan.

 This is expected for a patient with a femur fracture who has limited mobility. It does not indicate a complication.

Summary:

The most critical sign to report immediately is confusion, as it could indicate fat embolism syndrome, hypoxia, or other life-threatening conditions. While pain, blood pressure, and voiding patterns should be monitored, they do not require urgent intervention like neurological changes.

Correct Answer: D) Tachycardia.

Rationale:

Metoprolol tartrate (Lopressor) is a beta-blocker used to treat hypertension. Beta-blockers work by blocking beta-adrenergic receptors, which reduces heart rate, blood pressure, and myocardial oxygen demand. One of the key physiological responses to hypoglycemia (low blood sugar) is the activation of the sympathetic nervous system, which leads to tachycardia (increased heart rate), palpitations, and tremors. Beta-blockers like metoprolol blunt this response by preventing an increase in heart rate, making it harder for patients to recognize the early warning signs of hypoglycemia. This is particularly concerning for patients with diabetes, as they may not feel the usual symptoms of hypoglycemia ("hypoglycemia unawareness"), putting them at risk for severe low blood sugar episodes without warning.

Why the Other Options Are Incorrect:

A) Diaphoresis (Sweating) – Not masked

Sweating is controlled by cholinergic (parasympathetic) fibers, not beta-adrenergic receptors. Beta-blockers do not affect diaphoresis, so a patient experiencing hypoglycemia may still sweat even if other symptoms are masked.

B) Tingling (Paresthesia) – Not masked

Tingling, numbness, and neuropathic symptoms of hypoglycemia are due to neuroglycopenia (low glucose supply to the brain). Beta-blockers do not interfere with these neurological symptoms, so tingling would still be felt during hypoglycemia.

C) Diplopia (Double Vision) – Not masked

Double vision occurs due to neuroglycopenia affecting the brain and cranial nerves. Metoprolol does not affect the central nervous system (CNS) symptoms of hypoglycemia, so a patient can still experience blurred vision or diplopia when blood sugar drops too low.

Summary:

The correct answer is D) Tachycardia because beta-blockers blunt the body's normal sympathetic response to hypoglycemia, making it harder to detect low blood sugar levels early. This can increase the risk of severe hypoglycemia in diabetic patients.