HESI MS HESI Medical and Surgical Exam - Set 4 - Part 1

Correct Answer: Nailbed pressure tests the most distal peripheral pathway.

Nailbed pressure produces a localized peripheral response by stimulating the distal sensory pathway. Sternal rub, orbital rim pressure, and sternocleidomastoid compression elicit centralized, brainstem-level responses rather than true peripheral assessments. Option b is incorrect because the brainstem is assessed using central stimulation techniques such as pressure on the orbital rim or sternal rub, which provoke a generalized motor response driven by brainstem and higher cortical pathways, not the distal peripheral nerves. Option c is incorrect because the corneal reflex assesses cranial nerve V and is tested by lightly touching the cornea with a wisp of cotton, producing eyelid closure. Nailbed pressure has no connection to cranial nerve function or the blink reflex pathway. Option d is incorrect because cerebellar coordination is evaluated through tests such as finger-to-nose, heel-to-shin, and tandem gait assessment. Applying pressure to a nailbed measures a pain response in perip

Correct Answer: Cushing's triad indicating rising intracranial pressure.

Cushing's triad — rising blood pressure with widening pulse pressure, bradycardia, and irregular respirations — represents the brain's last-ditch attempt to maintain cerebral perfusion against dangerously elevated ICP. This is a late, urgent sign requiring immediate provider notification. Option a is incorrect because hypovolemic shock produces hypotension and tachycardia together, not hypertension with bradycardia. The rising systolic blood pressure and slowing heart rate here are the opposite of a hemorrhagic shock presentation. Option b is incorrect because opioid overdose produces miosis, respiratory depression, and hypotension — not progressive systolic hypertension and reflex bradycardia. The cardiovascular pattern here reflects intracranial pressure dynamics, not pharmacological sedation. Option d is incorrect because progressive bradycardia paired with hypertension and respiratory irregularity is never a normal post-injury variation. These findings represent a neurolo

Correct Answer: Straining causes the Valsalva maneuver, which raises intracranial pressure and risks rupture or rebleeding.

Straining activates the Valsalva maneuver, which raises intrathoracic and intra-abdominal pressure, transmitted as a spike in intracranial pressure. In a client with an unrepaired or recently repaired cerebral aneurysm, this pressure surge can precipitate rebleeding, a catastrophic complication. Stool softeners are prescribed specifically to prevent this. Option a is incorrect because the primary danger of straining with a cerebral aneurysm is intracranial, not renal. While elevated blood pressure is a concern throughout, the mechanism of injury here is the acute intracranial pressure surge from the Valsalva effect, not renal vasoconstriction. Option b is incorrect because the Valsalva maneuver transiently increases, then decreases, intrathoracic pressure — but the concern in aneurysm care is not hypoperfusion from reduced cardiac output. The threat is the spike in cerebral pressure that can tear a fragile arterial wall. Option c is incorrect because while it names the correct outcome,

Correct Answer: Loosen restrictive clothing and remove the pillow from under the head.

Loosening restrictive clothing allows the chest to expand freely, and removing the pillow reduces hyperextension of the neck. These actions protect the client without introducing additional hazards. The nurse also pads the side rails and remains at the bedside throughout the seizure. Option a is incorrect because inserting any object into a seizing client's clenched jaw can chip teeth, lacerate gum tissue, and create fragments that obstruct the airway. Current nursing guidelines explicitly prohibit placing anything in the mouth of a seizing client. Option c is incorrect because restraining seizing limbs transfers the full force of tonic-clonic contractions to bones and joints, creating a high risk of fractures. The nurse clears hazards from the environment rather than using physical restraint against involuntary muscle activity. Option d is incorrect because suctioning during active convulsions risks placing the suction catheter against clenching teeth, injuring the oral mucosa, a

Correct Answer: Teach the client to scan both sides of the environment and deliberately attend to the left side of the body.

The client is exhibiting unilateral neglect, where the brain fails to register stimuli from the contralateral side despite intact vision. The rehabilitation strategy is to teach the client to actively scan and physically touch both sides of the body and visual field, building conscious compensatory awareness for the neglected side. Option b is incorrect because a sling immobilizes the unaffected limb and removes the client's functional arm for self-care and mobility. The neglect affects perception of the left side, not function; protecting the arm requires expanding the client's awareness rather than limiting the right arm's use. Option c is incorrect because unilateral neglect is a perceptual processing disorder caused by brain injury, not a visual field defect. Ophthalmology assessment addresses structural eye and optic nerve pathology; the client's eyes are functioning normally, but the brain is not processing left-sided information. Option d is incorrect because

Correct Answer: Raise the head of the bed and correct the catheter kink immediately.

The presentation is classic autonomic dysreflexia triggered by bladder distension. The first actions are raising the head of the bed — which harnesses gravity to lower blood pressure — and unkinning the catheter to eliminate the noxious stimulus driving the sympathetic surge. Both steps happen simultaneously without delay. Option a is incorrect because giving an antihypertensive without removing the trigger only transiently lowers blood pressure. The stimulus continues, sympathetic outflow persists, and hypertension returns. Eliminating the cause always precedes pharmacological treatment in autonomic dysreflexia. Option b is incorrect because laying the client supine in autonomic dysreflexia removes the orthostatic blood pressure reduction that gravity provides and can push the blood pressure even higher, increasing the risk of intracranial hemorrhage. Option c is incorrect because the hypertension here has a clear identifiable cause — bladder distension triggering a spinal reflex arc

Correct Answer: This is a positive test confirming myasthenic crisis; the client needs more anticholinesterase.

A positive edrophonium test — transient improvement in muscle strength after injection — confirms that the problem is too little acetylcholine effect at the myoneural junction. This is myasthenic crisis from undermedication, and the provider will increase anticholinesterase therapy. Atropine must always be available when edrophonium is administered. Option a is incorrect because strength improvement after edrophonium is by definition a positive result indicating myasthenic crisis, not cholinergic crisis. In cholinergic crisis, edrophonium worsens weakness and produces facial twitching — the opposite of what was observed in this client. Option b is incorrect because the edrophonium result is unambiguous. A clear improvement in ptosis and muscle strength within 60 seconds is the textbook positive response. Repeating the test four hours later would delay treatment of a potentially life-threatening crisis without serving any diagnostic purpose. Option d is incorrect because the edrophonium

Correct Answer: Rock the body back and forth to initiate movement when freezing occurs.

Rocking shifts weight rhythmically and uses proprioceptive feedback to trigger the motor pathways needed to restart voluntary stepping in Parkinson's disease. This technique directly addresses the disrupted extrapyramidal circuit and is a standard recommendation from Saunders and occupational therapy practice for freezing gait. Option a is incorrect because attempting to speed up during a freezing episode does not overcome the basal ganglia dysfunction causing the freeze. Acceleration in a shuffling parkinsonian gait increases fall risk by pushing the client's center of gravity beyond the base of support. Option c is incorrect because closing the eyes removes visual cues that help maintain balance, which is already compromised by Parkinson's disease. Visual input is a compensatory resource for these clients, and eliminating it during a freezing episode increases fall risk rather than resolving the step-initiation failure. Option d is incorrect because relying on grabbing

Correct Answer: Heat slows nerve conduction velocity in partially demyelinated axons, worsening existing symptoms.

In multiple sclerosis, the surviving but partially demyelinated axons are temperature-sensitive. Even a modest increase in body temperature further slows or blocks conduction in these vulnerable fibers, producing transient worsening of weakness, vision changes, and fatigue without causing structural damage. The client should avoid overheating. Option a is incorrect because heat exposure does not trigger a new autoimmune attack. MS relapses are driven by T-cell activity and can be precipitated by infection or stress, but passive body warming does not initiate immunological destruction of myelin. Option b is incorrect because spasticity in MS arises from upper motor neuron pathway disruption caused by demyelination, not from heat directly contracting sarcomeres. The mechanism is neurological conduction failure in the corticospinal tracts, not a primary muscle fiber event. Option c is incorrect because heat does not create new demyelinating lesions. Lesion formation is driven by the autoi

Correct Answer: Encourage fluid intake and keep the client positioned flat to reduce cerebrospinal fluid pressure gradient.

Post-lumbar puncture headache results from CSF leakage through the puncture site, which lowers intracranial pressure. Lying flat reduces the hydrostatic gradient that pulls fluid downward through the puncture, and increased oral fluid intake helps replenish CSF volume to restore pressure and seal the puncture site. Option b is incorrect because elevating the head worsens post-LP headache by increasing the pressure gradient that draws more CSF through the puncture hole. Fluid restriction is also contraindicated; the client needs more fluid, not less, to restore CSF volume lost at the puncture site. Option c is incorrect because cold compresses and fluid restriction do not address the underlying mechanism of CSF leakage. CSF production does not need to be reduced; the leaking puncture site needs to be supported by rest, fluid replacement, and time. Option d is incorrect because ambulation raises the head position and worsens the headache by increasing the gravity-dependent CSF pressure g

Correct Answer: Expressive aphasia from damage to Broca's area in the frontal lobe.

In expressive aphasia, the client understands spoken language but cannot produce verbal communication. Broca's area in the frontal lobe controls the motor production of speech; damage there leaves comprehension intact while blocking verbal output. The client's ability to understand and respond with nods is the defining clinical feature. Option a is incorrect because receptive aphasia from Wernicke's area damage impairs comprehension; the client cannot understand spoken or written words. This client demonstrates intact comprehension by responding appropriately to yes-or-no questions, which rules out receptive aphasia. Option b is incorrect because global aphasia affects both expression and reception, leaving the client unable to understand and unable to produce language. This client clearly understands the nurse and responds correctly to simple instructions, so global aphasia does not fit the picture. Option d is incorrect because anomic aphasia specifically impairs word

Correct Answer: Notify the provider immediately, as these findings are consistent with possible rebleeding.

A sudden catastrophic headache with an acute blood pressure spike after straining in a subarachnoid hemorrhage client signals possible rebleeding, the most feared and lethal complication of cerebral aneurysm. The provider must be notified immediately so emergency imaging and neurosurgical evaluation can proceed without delay. Option a is incorrect because administering routine analgesia and waiting 15 minutes delays potentially life-saving emergency assessment when rebleeding is suspected. Pain management is appropriate but cannot precede immediate provider notification and emergency evaluation. Option b is incorrect because while GCS documentation is valuable data, it does not replace immediate provider notification as the first action. Gathering assessment data while the provider remains uninformed of a possible rebleed wastes critical minutes that determine whether the client survives. Option c is incorrect because dimming lights and encouraging rest are standard aneurysm precaution

Correct Answer: Positive Brudzinski's sign and positive Kernig's sign, indicating meningeal irritation.

Brudzinski's sign is involuntary hip and knee flexion triggered by passive neck flexion. Kernig's sign is pain and hamstring spasm when the knee is extended from a flexed hip position. Both indicate irritation of the meninges and the nerve roots they surround, and both are cardinal findings in bacterial meningitis. Option a is incorrect because Babinski's sign is dorsiflexion of the great toe when the lateral foot sole is firmly stroked, and Romberg's sign is loss of balance when the client stands with eyes closed. Neither test was described in this scenario, and they assess different neurological systems than meningeal integrity. Option c is incorrect because flaccid paralysis is the absence of motor tone and decorticate posturing involves arm flexion to the chest. The responses described here are reflex arcs triggered by meningeal irritation, not motor pathway deficits, and they are not posturing patterns. Option d is incorrect because hyperreflexia and clonus res

Correct Answer: Phenytoin mixed in normal saline, infused no faster than 50 mg per minute with cardiac monitoring.

Phenytoin must be diluted only in normal saline because dextrose solutions cause drug precipitation. The infusion must not exceed 25 to 50 mg per minute, as faster rates cause hypotension and potentially fatal cardiac dysrhythmias. An inline filter and continuous cardiac monitoring are required throughout the infusion. Option a is incorrect because dextrose 5% water causes phenytoin to crystallize in the IV line, rendering the drug inactive and creating a clot risk. Using any dextrose solution as a diluent for phenytoin is a specific contraindication regardless of the infusion rate. Option b is incorrect because lactated Ringer's contains calcium, which can cause phenytoin to precipitate just as dextrose does. Additionally, an inline filter is required for IV phenytoin administration to catch any microcrystalline particles before they reach the bloodstream. Option d is incorrect because rapid bolus administration of phenytoin causes severe, potentially fatal cardiovascular toxicit

Correct Answer: Emotional lability is a common effect of stroke-related brain injury and is not a sign of a new complication.

Emotional lability — rapid, disproportionate mood swings — is a recognized neurological consequence of stroke that results from disruption of cortical and limbic circuits regulating emotional expression. Reassuring the family that this is a common post-stroke finding, rather than a personality change or new event, is an important part of discharge education. Option a is incorrect because post-stroke depression requires persistent symptoms over at least two weeks before a diagnosis can be made. Abrupt, disproportionate emotional shifts three days after stroke are better characterized as lability from the brain injury itself, not clinical depression requiring immediate pharmacotherapy. Option b is incorrect because new intracranial hemorrhage produces declining consciousness, worsening neurological deficits, acute vital sign changes, and focal findings — not episodic emotional outbursts in an otherwise alert client. This presentation does not warrant emergency imaging based on emotional

Correct Answer: Notify the provider immediately and prepare for possible intubation and mechanical ventilation.

The major life threat in Guillain-Barré syndrome is respiratory muscle paralysis from ascending motor neuron demyelination. Tachypnea, inability to complete sentences, and falling oxygen saturation signal impending respiratory failure. The provider must be notified immediately and intubation equipment prepared without delay. Option a is incorrect because a nonrebreather mask and increased fluids support oxygenation but cannot compensate for neuromuscular respiratory failure when the diaphragm and intercostals become too weak to move air. Supplemental oxygen buys very little time when the pump mechanism is failing. Option b is incorrect because incentive spirometry and routine repositioning are maintenance interventions for a client who is still breathing adequately. A client who cannot complete sentences is already in respiratory distress; these measures are grossly insufficient for the urgency of the situation. Option d is incorrect because waiting two hours to reassess a client with

Correct Answer: Dietary amino acids from protein compete with levodopa at the blood-brain barrier for the same transport carriers, reducing the amount of drug that enters the CNS.

Levodopa and large neutral amino acids from dietary protein share the same saturable carrier proteins at the blood-brain barrier. When plasma amino acid levels are high from a protein-rich meal, competition at these transporters reduces levodopa entry into the CNS, producing a clinically significant drop in therapeutic effect. Option b is incorrect because levodopa's primary metabolism occurs via peripheral dopa decarboxylase enzymes and catechol-O-methyltransferase, not hepatic enzyme induction from dietary protein. Carbidopa blocks peripheral decarboxylation; the dietary interaction involves transport competition at the blood-brain barrier, not accelerated first-pass metabolism. Option c is incorrect because carbidopa's protective role is to inhibit peripheral decarboxylase enzymes, not gastric acid. Gastric pH does not influence carbidopa's mechanism of action, and protein does not neutralize stomach acid in a clinically meaningful way that affects levodopa peripheral

Correct Answer: Autonomic dysreflexia triggered by bladder distension below the spinal lesion.

In injuries above T6, afferent signals from bladder distension below the lesion trigger an uncontrolled sympathetic outburst. Descending inhibition is blocked by the injury, so blood pressure climbs dramatically. Compensatory parasympathetic activity above the lesion produces flushing and bradycardia, while the skin below remains pale and cold because the sympathetic vasoconstriction there cannot be overridden. Option a is incorrect because neurogenic shock occurs acutely after injury and produces hypotension from loss of vascular tone, not the hypertension seen here. Eight weeks post-injury, the acute neurogenic shock phase has long passed; the current picture of sky-high blood pressure points to uncontrolled sympathetic outflow. Option b is incorrect because medication non-compliance alone does not produce the split flushing and cold skin pattern, bradycardia, and a clear identifiable trigger in a spinal cord injury client. The clinical hallmarks here are pathognomonic for autonomic

Correct Answer: Thirty degrees promotes jugular venous outflow, reducing cerebral venous congestion and intracranial pressure.

After supratentorial craniotomy, elevating the head of bed to 30 degrees promotes venous blood outflow through the jugular veins, reduces cerebral venous pooling, and thereby lowers intracranial pressure. This specific angle is prescribed by the provider and must not be changed without a new order. Option a is incorrect because aspiration prevention is a general nursing concern applied broadly, not the primary physiological rationale for the post-craniotomy 30-degree position. Head elevation for aspiration uses a different clinical reasoning path than the ICP management logic driving the craniotomy positioning order. Option c is incorrect because healthy adults tolerate 30-degree head elevation without significant cardiac output reduction. The 30-degree angle is specifically selected for its ICP benefit, not because higher elevations cause hemodynamic instability in otherwise stable postoperative craniotomy clients. Option d is incorrect because surgical drain placement is not the dete

Correct Answer: Consume small, soft meals at room temperature and chew on the unaffected side.

Trigeminal neuralgia pain fires when the fifth cranial nerve is stimulated by thermal or mechanical pressure. Room-temperature food eliminates thermal triggers, soft texture reduces mechanical contact pressure during chewing, and chewing on the unaffected side keeps stimulation away from the pain-sensitive branch. Option a is incorrect because temperature extremes in any combination are established triggers for trigeminal neuralgia, not a desensitization strategy. Intentionally alternating hot and cold items would reliably provoke painful episodes rather than reducing nerve sensitivity over time. Option b is incorrect because chewing on the affected side increases direct stimulation of the painful nerve branch with each bite. The correct instruction is to chew on the unaffected side, not to protect the unaffected side from involvement, which has no clinical basis. Option d is incorrect because a permanent liquid-only diet is unnecessarily restrictive and nutritionally inadequate for lo