Mental Health Emergencies

Question One: The correct answer is C. Physical restraints are considered a last-resort intervention and should only be implemented when a patient poses an immediate risk of harm and less restrictive measures have been attempted and proven ineffective. Relocating the patient to a low-stimulation environment is an appropriate de-escalation strategy that reduces external triggers and may help calm agitation without the need for restraints. Chemical restraints are not required to be attempted prior to physical restraints, as the choice depends on clinical judgment and safety considerations. Removing all of the patient’s clothing is not a standard prerequisite and may compromise dignity unless clinically indicated. Simply warning the patient that restraints will be applied does not fulfill the requirement to attempt nonrestrictive interventions.

Question Two: The correct answer is C. Asking direct, specific questions about suicidal thoughts, plan, and intent is the most therapeutic approach because it allows the nurse to accurately assess the level of risk and determine the need for immediate intervention. Evidence shows that directly asking about suicide does not increase suicidal thoughts but instead promotes safety by encouraging honest disclosure and demonstrating concern. Diversionary tactics are inappropriate because they minimize the patient’s distress and may prevent accurate risk assessment. Using short, simple statements may be helpful in other psychiatric conditions, such as mania, but does not adequately assess suicide risk. Maintaining a firm, emotionally detached tone can create distance and reduce trust; patients expressing suicidal ideation require a calm, empathetic, and nonjudgmental approach to facilitate open communication.

Question Three: The correct answer is C. Metformin toxicity is most notably associated with lactic acidosis, a serious complication characterized by metabolic acidosis with a low pH and decreased bicarbonate levels. Reviewing arterial blood gases is most helpful because it can identify this acid–base disturbance and support the diagnosis of metformin-associated lactic acidosis. Platelet count is not affected by metformin toxicity and does not aid in diagnosis. Serum glucose levels may be normal or low, but metformin does not typically cause significant hypoglycemia on its own, making this value less useful for confirming overdose. Serum creatinine is important for assessing renal function, which influences metformin clearance, but it does not directly confirm toxicity. Therefore, arterial blood gas analysis is the most useful laboratory value to review when a metformin overdose is suspected.

Environment and Toxicology Emergencies, and Communicable Diseases.

Question Four: The correct answer is C. Hydroxocobalamin, a first-line antidote for cyanide poisoning, commonly causes a harmless and expected side effect of reddish discoloration of the urine (chromaturia) due to its deep red color and renal excretion. This finding can be mistaken for hematuria but does not indicate bleeding or renal injury. Therefore, the infusion should be continued while the patient is monitored. Discontinuing the infusion or initiating interventions such as evaluating for hemolysis, reducing the infusion rate, obtaining unnecessary urine studies, or performing bladder irrigation are inappropriate because they respond to a benign, expected effect rather than a true complication.

Question Five: The correct answer is C. The target temperature when reducing core body temperatures in a patient with heat stroke is 102ºF (38.9ºC). Patients with heat stroke do not tend to sweat; therefore, lack of sweating does not indicate effective treatment. Shivering is undesired as it re-elevates core body temperature. The initiation of sweating is not an indication of effective cooling. Hypotension (related to heat-mediated vasodilation) will cause hypotension; therefore, effective treatment should cause the mean arterial pressure to increase rather than decline.

Question Six: The correct answer is D. Diphtheria is most likely recognized during visualization because the hallmark finding is a thick gray pseudomembrane in the oropharynx that can be directly seen during examination. Palpation may reveal lymphadenopathy, but is not diagnostic. Percussion and auscultation are not useful for identifying diphtheria, as it primarily affects the upper airway and is diagnosed based on visual inspection of the throat.

Question Seven: The correct answer is D. Rigorous hand hygiene with soap and water is the most effective intervention because Clostridium difficile forms spores that are resistant to alcohol-based hand sanitizers, and mechanical washing is required to remove them and prevent transmission. Droplet precautions are not appropriate because C. difficile spreads via contact, not respiratory droplets. Alcohol-based hand cleansers are ineffective against spores and do not adequately reduce transmission risk. Antibiotic therapy is used to treat the infection, but does not prevent its spread between patients.

Cardiovascular Emergencies

Question Eight: The correct answer is A. Septic shock is characterized by distributive vasodilation, which produces hypotension along with warm, dry skin due to increased peripheral blood flow in the early phase. Patients commonly present with tachycardia and altered mental status as tissue perfusion becomes impaired. Cardiogenic shock is less consistent with this presentation because patients typically have cool, clammy skin caused by poor cardiac output and compensatory vasoconstriction. Anaphylactic shock can also involve distributive vasodilation and hypotension, but it is usually accompanied by additional findings such as urticaria, angioedema, bronchospasm, or airway compromise. Hypovolemic shock is also unlikely because it typically produces cool, pale, clammy skin as the body attempts to preserve blood flow to vital organs through peripheral vasoconstriction.

Question Nine: The correct answer is A. An S3 heart sound occurs during early diastole when blood rapidly flows into a dilated or volume-overloaded ventricle, creating vibrations as the ventricle fills. In adults, this finding is most commonly associated with heart failure, where decreased ventricular function and increased fluid volume lead to rapid ventricular filling. Hypertension and left ventricular hypertrophy are more often associated with an S4 heart sound due to reduced ventricular compliance and increased resistance to filling. Aortic stenosis typically produces a systolic murmur caused by turbulent blood flow across the narrowed valve rather than an S3 heart sound.

Question Ten: The correct answer is C. T-wave inversion on the electrocardiogram is a common finding in myocardial ischemia and is frequently seen in patients experiencing a non–ST elevation myocardial infarction. This change reflects subendocardial ischemia and is often present along with ST-segment depression, which also indicates reduced blood flow to the myocardium without full-thickness infarction. T-wave inversion is not unusual in NSTEMI and therefore should not be considered an uncommon finding. Nitroglycerin may relieve chest discomfort by improving myocardial oxygen balance, but it does not reliably cause immediate resolution of ischemic ECG changes. Additionally, the timing of T-wave inversion cannot be predicted to occur at a specific interval, such as one hour after symptom onset, because ECG changes during myocardial ischemia may appear at varying times depending on the severity and progression of the ischemia.

Question Eleven: The correct answer is D. Elevation of a limb with arterial occlusion decreases arterial perfusion because gravity further limits blood flow to the already ischemic tissues. This worsens tissue hypoxia and typically results in increased pain in the affected extremity. Pedal pulses would not become more palpable because arterial flow remains impaired. Reduction of edema is more associated with venous insufficiency rather than arterial occlusion. The extremity would typically become more pale rather than less pale when elevated due to reduced arterial blood supply.

Head, Eye, Ear, Nose, and Throat Emergencies

Question Twelve: The correct answer is A. Labyrinthitis is an inner ear disorder characterized by inflammation affecting both the vestibular and cochlear portions of the ear, resulting in vertigo accompanied by hearing loss, so a report of decreased hearing supports this diagnosis. A sensation of fullness in the ear is more commonly associated with Meniere’s disease. Recurrent episodes of vertigo suggest conditions such as Meniere’s disease or benign paroxysmal positional vertigo rather than the typically acute presentation of labyrinthitis. Reddish-yellow discharge indicates an external or middle ear infection and is not consistent with inner ear inflammation.

Question Thirteen: The correct answer is B. Central retinal artery occlusion causes sudden, painless vision loss due to interruption of blood flow to the retina, so the primary goal of treatment is restoration of perfusion and improvement in vision. Reduction in pain is not relevant because this condition is typically painless. Return of pupil reactivity may occur, but is not the primary indicator of successful treatment. Decreasing mean arterial pressure would not be beneficial and could further reduce retinal perfusion, worsening the condition.

Question Fourteen: The correct answer is A. Chemical exposure to the eyes is an ocular emergency that requires immediate irrigation to dilute and remove the offending agent, making flushing the eyes with water the highest priority intervention. Delaying irrigation to obtain vital signs, apply compresses, set up specialized equipment, or contact poison control can result in worsening injury and potential vision loss. Initial management should focus on rapid and continuous irrigation before any further assessment or interventions.

Musculoskeletal and Wound Emergencies

Question Fifteen: The correct answer is B. Tourniquets should be applied directly to the skin proximal to the site of bleeding to ensure effective occlusion of blood flow, making it necessary to cut away clothing before application. Tourniquets should not be placed over joints such as the knee because this reduces their effectiveness. Elevating the extremity is not required once a tourniquet is applied, as hemorrhage control has already been achieved. Placing bulky dressings under the tourniquet decreases the pressure transmitted to the vessels and can result in inadequate bleeding control.

Question Sixteen: The correct answer is C. Deep, persistent bone pain is the earliest indication of osteomyelitis because infection within the bone causes localized inflammation and increased pressure before systemic symptoms or visible changes develop. Fever may occur later and is not always present, especially in chronic or early cases. A draining cyst or sinus tract is a late finding that indicates chronic infection. Edema surrounding the area also tends to occur later as the infection progresses to involve the surrounding soft tissues.

Question Seventeen: The correct answer is A. The anatomical snuffbox overlies the scaphoid bone, and tenderness in this area is a classic finding associated with scaphoid fractures, making palpation of this region an important assessment maneuver in wrist injuries. Median nerve function is evaluated through motor and sensory testing rather than palpation of the snuffbox. Radial artery patency is assessed by checking pulses or performing an Allen test. Applying pressure to the snuffbox is not an effective method for controlling bleeding from hand injuries.

Respiratory Emergencies

Question Eighteen: The correct answer is B. This patient is in severe hypovolemic shock, as evidenced by profound hypotension and tachycardia. Positive end-expiratory pressure (PEEP) increases intrathoracic pressure, which can decrease venous return to the heart and reduce preload. In a patient who is already preload dependent due to hypovolemia, a high PEEP level, such as 12 cm H₂O can further compromise cardiac output and worsen hypotension. Initial PEEP in trauma patients without acute respiratory distress syndrome is typically set at lower levels, such as 5 cm H₂O. The ordered tidal volume of 450 mL is appropriate for an 80-kg patient using lung-protective ventilation strategies, the respiratory rate of 14 breaths per minute is within normal initial settings, and an FiO₂ of 50% is reasonable given the oxygen saturation of 94%. Therefore, the PEEP setting should be questioned.

Question Nineteen: The correct answer is C. Pneumonia that develops within 48 hours of hospital admission or intubation does not meet the criteria for hospital-acquired pneumonia or ventilator-associated pneumonia, both of which are defined as occurring 48 hours or more after admission or initiation of mechanical ventilation. Because this patient developed pneumonia only 24 hours after intubation, it is most likely that the infection was already incubating prior to hospitalization and therefore represents community-acquired pneumonia. Aspiration pneumonia would typically be associated with a witnessed aspiration event or risk factors such as vomiting or impaired airway protection, which are not described in this scenario.

Question Twenty: The correct answer is A. A massive pulmonary embolism obstructs blood flow through the pulmonary arteries, significantly increasing pulmonary vascular resistance and right ventricular afterload. As the right ventricle struggles to eject blood into the obstructed pulmonary circulation, less blood reaches the left atrium and subsequently the left ventricle. This results in decreased left ventricular preload due to reduced pulmonary venous return. The diminished preload leads to decreased cardiac output and can cause hypotension, making reduced left ventricular preload a key hemodynamic consequence of a large pulmonary embolism.

Professional Issues

Question Twenty-One: The correct answer is D. Photographs taken during a forensic examination are considered protected health information when they are created as part of the patient’s medical care and contain information that could reasonably identify the patient. Any photograph of a patient’s body that allows the individual to be identified—such as through facial features, tattoos, scars, or unique injuries—constitutes protected health information under HIPAA. The absence of the patient’s face does not automatically remove HIPAA protection if other identifying features are present. Protected health information also does not require the patient’s name to be attached to the image if the individual could otherwise be identified. Additionally, patient consent to photography for medical or forensic purposes does not remove the HIPAA protections that apply to those images once they become part of the medical record.

Question Twenty-Two: The correct answer is D. Reducing drug diversion helps decrease healthcare-associated infection rates because diversion often involves tampering with medications, reuse of syringes, or contamination of injectable drugs, all of which can expose patients to pathogens and increase infection risk. Staff overtime hours are not directly related to drug diversion and may be influenced by staffing levels or workload instead. The number of imaging studies is unrelated to medication handling practices and would not be expected to change with reduced diversion. Patient satisfaction scores may be indirectly affected by many factors, but they are not as directly or consistently impacted by drug diversion as infection rates are.

Question Twenty-Three: The correct answer is D. Reducing drug diversion helps decrease healthcare-associated infection rates because diversion often involves tampering with medications, reuse of syringes, or contamination of injectable drugs, all of which can expose patients to pathogens and increase infection risk. Staff overtime hours are not directly related to drug diversion and may be influenced by staffing levels or workload instead. The number of imaging studies is unrelated to medication handling practices and would not be expected to change with reduced diversion. Patient satisfaction scores may be indirectly affected by many factors, but they are not as directly or consistently impacted by drug diversion as infection rates are.

Question Twenty-Four: The correct answer is C. Adolescents who have experienced sexual abuse commonly exhibit trauma-related psychological responses, including a heightened need for control and safety, which often manifests as increased personal space boundaries and discomfort with physical proximity. Vaginal discharge is not a consistent or expected finding and would depend on specific injury or infection rather than being a general response to abuse. Core body temperature is not typically affected by psychological trauma in this context. A desire to share details of the event usually does not increase, as patients are often hesitant, fearful, or reluctant to disclose information due to anxiety, shame, or distress.

Question Twenty-Five: The correct answer is D. In a mass-casualty incident, disaster triage is focused on maximizing survival across the population by prioritizing limited resources for those most likely to benefit, rather than providing individualized or definitive care to each patient. Rapid evacuation of all victims is not the primary goal, as transport decisions must be prioritized based on severity and survivability. Treating patients in order of arrival is inappropriate because triage requires sorting based on urgency and likelihood of survival, not timing. Providing immediate definitive care is also not feasible in disaster situations, where the emphasis is on rapid assessment and lifesaving interventions to achieve the greatest good for the greatest number.

Neurological Emergencies

Question Twenty-Five: The correct answer is B. The most likely diagnosis is a cluster headache because it classically presents with severe, unilateral periorbital pain that is sudden in onset and lasts between 15 minutes and 3 hours. Associated autonomic symptoms such as lacrimation, nasal congestion, and conjunctival injection are common, and patients are often restless or pacing due to the intensity of the pain. Temporal arteritis typically affects patients over age 50 and is associated with jaw claudication, scalp tenderness, and possible vision changes rather than short, severe attacks with tearing. Tension headaches cause bilateral, band-like pressure without autonomic symptoms. Migraines usually last longer, are often accompanied by nausea, photophobia, and phonophobia, and patients typically prefer to lie still rather than pace.

Question Twenty-Six: The correct answer is A. The most suggestive finding of a posterior circulation stroke is vertigo with ataxia because posterior strokes involve the vertebrobasilar system, which supplies the brainstem and cerebellum. These areas are responsible for balance and coordination, making dizziness, vertigo, and gait instability classic presenting features. Expressive aphasia and word-finding difficulty are typically associated with anterior circulation strokes involving the dominant hemisphere, particularly the middle cerebral artery territory. Olfactory hallucinations are more commonly linked to temporal lobe seizures rather than vascular events in the posterior circulation.

Question Twenty-Seven: The correct answer is D. The most characteristic finding of myasthenia gravis is fluctuating muscle weakness that worsens with activity because the disorder is caused by an autoimmune disruption of acetylcholine receptors at the neuromuscular junction, leading to fatigable weakness that improves with rest; ocular symptoms such as ptosis and diplopia are common early signs, and reflexes and sensation typically remain normal. Hyperreflexia and spasticity are signs of an upper motor neuron lesion and are not associated with myasthenia gravis. Progressive ascending paralysis is more consistent with Guillain-Barré syndrome, which involves peripheral nerve demyelination and often includes diminished reflexes. Cognitive decline with memory impairment suggests a neurodegenerative condition such as Alzheimer’s disease and does not occur in myasthenia gravis, as mental status is unaffected.

Medical Emergencies

Question Twenty-Eight: The correct answer is D. Hypernatremia most commonly results from a loss of free water, leading to an increased serum sodium concentration, and is frequently associated with conditions that cause dehydration, such as prolonged vomiting; therefore, a history of a stomach bug with several days of vomiting best supports this diagnosis because it leads to fluid loss and a relative water deficit. Taking antibiotics for a bladder infection does not affect sodium balance or cause significant fluid loss. Hydrochlorothiazide is more commonly associated with hyponatremia rather than hypernatremia due to increased sodium loss in the urine. Following a low-carbohydrate diet may alter metabolism but is not a typical or direct cause of hypernatremia in most patients.

Question Twenty-Nine: The correct answer is C. The correct answer is blood pressure monitoring because pheochromocytoma is a catecholamine-secreting tumor that causes episodic or sustained severe hypertension due to excessive release of epinephrine and norepinephrine. The primary goal of treatment is to control this hypertension and prevent serious complications such as stroke, myocardial infarction, or aortic dissection. Therefore, monitoring blood pressure is the most direct and reliable way to evaluate the effectiveness of therapy. While an electrocardiogram may detect arrhythmias related to catecholamine excess, it does not directly measure the primary therapeutic target. Chest radiography and oxygen saturation monitoring are not useful indicators of treatment response in this condition. Thus, blood pressure measurement is the most appropriate assessment tool to determine treatment effectiveness.

Question Thirty: The correct answer is C. Cryoprecipitate is rich in fibrinogen and is administered in disseminated intravascular coagulation to replace depleted clotting factors, particularly fibrinogen, thereby improving the blood’s ability to clot. Reducing petechiae is a potential outcome of improved clotting, but it is not the primary therapeutic action of cryoprecipitate. Facilitating clot lysis is incorrect because cryoprecipitate supports clot formation rather than breakdown. Interrupting the clotting cascade is also incorrect, as this intervention provides clotting components instead of inhibiting the coagulation process.

Question Thirty-One: The correct answer is D. Buprenorphine should be initiated once a patient is in moderate opioid withdrawal because starting it too early can precipitate withdrawal due to its high affinity and partial agonist activity at opioid receptors, which displaces full agonists. Administering it immediately after the last opioid use is inappropriate because opioids are still active in the system and can lead to precipitated withdrawal. Waiting until all withdrawal symptoms have resolved is incorrect because treatment is intended to relieve, not delay, withdrawal. Administration after naloxone reversal is also inappropriate, as the patient may still have opioids in their system and is not necessarily in sufficient withdrawal for safe initiation.

Gastrointestinal Emergencies

Question Thirty-Two: The correct answer is A. Peritonitis is characterized by inflammation of the peritoneal lining, producing classic findings such as guarding, rigidity, and rebound tenderness, which are best identified through palpation of the abdomen. Palpation allows the examiner to assess for pain with pressure and release, which are key indicators of peritoneal irritation. Percussion may reveal generalized tenderness but is less specific, auscultation may show decreased or absent bowel sounds, and visualization may identify abdominal distension, but none of these findings is as definitive as palpation in confirming peritonitis.

Question Thirty-Three: The correct answer is A. Hepatitis A is transmitted through the fecal-oral route, and infection control measures focus on preventing the spread of contaminated stool through proper hygiene and limiting shared bathroom use. Encouraging the patient to use a separate bathroom reduces the risk of transmitting the virus to others in the household. Hepatitis B, C, and D are primarily transmitted through blood and body fluids and are not spread through casual contact or shared bathroom facilities.

Question Thirty-Four: The correct answer is C. During the acute phase of cyclic vomiting syndrome, treatment focuses on supportive care, including antiemetics, hydration, and protection of the gastrointestinal mucosa; proton pump inhibitors may be used to reduce gastric irritation caused by repeated vomiting. Opioid analgesics are generally avoided because they can worsen nausea and delay gastric emptying. Routine monitoring for blood in the stool is not a priority unless gastrointestinal bleeding is suspected. Instillation of cold saline via a gastric tube is not an appropriate or evidence-based intervention for cyclic vomiting syndrome.

Genitourinary, Gynecological, and Obstetrical Emergencies

Question Thirty-Five: The correct answer is A. Prostatitis is an inflammatory condition of the prostate gland that commonly presents with dull, aching pain in the perineal or pelvic region due to irritation and inflammation of surrounding tissues. Sharp scrotal pain is more characteristic of testicular conditions such as torsion or epididymitis, unilateral flank pain is typically associated with renal pathology such as kidney stones or pyelonephritis, and periumbilical discomfort is nonspecific and not commonly associated with prostatitis.

Question Thirty-Six: The correct answer is D. HELLP syndrome involves liver dysfunction due to microvascular injury and inflammation, which commonly leads to stretching of the liver capsule and results in right upper quadrant pain, making this the most likely complaint. Denying pain would be unlikely given the significant pathology associated with this condition. Lower back pain and pelvic discomfort are nonspecific and not characteristic of HELLP syndrome, which is more strongly associated with upper abdominal pain related to liver involvement.

Question Thirty-Seven: The correct answer is B. Foul-smelling lochia in a postpartum patient is most consistent with endometritis, which is an infection of the uterine lining commonly occurring within the first 10 days after delivery and often presents with malodorous discharge, fever, and uterine tenderness. Mastitis is an infection of the breast and presents with localized breast pain, redness, and fever rather than changes in lochia. Vaginal candidiasis typically causes itching and thick, white discharge, not foul-smelling lochia. A urinary tract infection presents with dysuria, frequency, and urgency, and does not affect the odor or characteristics of lochia.