Three Emergencies in One Afternoon

Correct answer: A. Refer for a chest and abdominal radiograph to confirm the object is in the GI tract

• A. CORRECT. The patient is speaking normally with a normal oxygen saturation and no stridor — the object has been SWALLOWED (into the oesophagus and GI tract), not ASPIRATED. But you cannot tell radiographically-blind which it was, and an aspirated object may be initially silent. The standard of care is to refer for RADIOGRAPHS of the chest and abdomen to locate it. If it is in the GI tract, it will almost always pass spontaneously and is managed expectantly with dietary advice and follow-up.
• B. The Heimlich manoeuvre is for a patient who is CHOKING — unable to speak, cough effectively or breathe. Performing abdominal thrusts on a patient with a patent airway achieves nothing and can cause injury.
• C. Doing nothing is unacceptable because aspiration cannot be excluded clinically, and a retained aspirated object causes pneumonia, abscess or bronchiectasis.
• D. Oxygen and EMS activation are for a compromised airway. This patient's airway is intact.

Note: The prevention is the point: a rubber dam, a gauze throat screen, or floss tied to small objects prevents essentially all of these events. Note also that this exact scenario appeared twice in the recall, once phrased around the Heimlich manoeuvre for an OBSTRUCTED airway — read the stem carefully for whether respiratory signs are present.

Correct answer: C. Deferring elective treatment and arranging prompt medical evaluation, same day

• A. Emergency transport is for hypertensive EMERGENCY — the same pressures WITH end-organ damage: chest pain, dyspnoea, severe headache, visual disturbance, neurological deficit, or altered consciousness. This patient has none.
• B. No elective dental treatment should proceed at this pressure, with or without vasoconstrictor modification.
• C. CORRECT. Systolic 180 or above, or diastolic 120 or above, is a HYPERTENSIVE CRISIS. Without symptoms or evidence of end-organ damage it is a hypertensive URGENCY, which requires that elective dental treatment be deferred and the patient be evaluated medically promptly — the same day — but does not require an ambulance.
• D. A three-month deferral is dangerously complacent at this pressure.

Note: ⚑ The recall keyed 'send to the ER'. That is correct for a hypertensive EMERGENCY. For an asymptomatic urgency the accepted answer is defer and refer urgently — recognise which one the stem is describing. Thresholds for deferral: BP ≥180/110–120 defer; 160–179 / 100–109 proceed with caution, short appointments, minimal stress and limited epinephrine; below 160/100 proceed normally.

Correct answer: A. Open the airway and administer high-flow oxygen

• A. CORRECT. CYANOSIS means inadequate oxygenation, and the immediate response is airway and oxygen. In the post-ictal period the tongue commonly falls back and secretions accumulate, so a head-tilt chin-lift, suction and HIGH-FLOW OXYGEN by mask are the first actions. Position him on his side in the recovery position to protect the airway, and monitor.
• B. Chest compressions are indicated only for a patient with no pulse and no normal breathing. He regained consciousness, so he has a pulse.
• C. Reassurance is not a treatment for hypoxia, and assuming patency without checking is precisely the error.
• D. A benzodiazepine is for a seizure that is still ONGOING beyond about five minutes — status epilepticus. This seizure has TERMINATED. Giving a benzodiazepine now would add respiratory depression to a patient who is already hypoxic.

Note: Seizure management sequence: protect from injury (do NOT restrain, do NOT put anything in the mouth), clear the area, time the event, position on the side, give oxygen, and activate EMS if the seizure lasts over five minutes, repeats without recovery, or is a first-ever seizure.

Correct answer: A. At least 2 inches (5 cm)

• A. CORRECT. Current AHA guidance specifies compressions of AT LEAST 2 INCHES (5 cm) in an adult, and not more than 2.4 inches (6 cm), at a rate of 100–120 per minute, allowing full chest recoil between compressions and minimising interruptions. In children compress about one-third of the chest depth, roughly 2 inches; in infants roughly 1.5 inches.
• B. 1 inch is grossly inadequate in an adult and generates almost no cardiac output.
• C. 3 inches exceeds the recommended maximum and risks rib fractures and visceral injury.
• D. 1.5 inches is the INFANT depth. Applied to an adult it will not perfuse the brain or myocardium.

Note: ⚑ SOURCE ERROR. The recall recorded 1.5 inches. The adult figure is AT LEAST 2 INCHES — please correct this in the group file, as it is a potentially consequential error. Compression-to-ventilation ratio is 30:2 for single-rescuer adult CPR.

Correct answer: A. Begin chest compressions and attach an AED as soon as one is available

• A. CORRECT. High-quality CHEST COMPRESSIONS begin immediately — the C-A-B sequence — and the AED is applied as soon as it arrives. Compressions maintain coronary and cerebral perfusion, and every minute of delay to defibrillation reduces survival by roughly 7–10%. Compressions and defibrillation are not alternatives; they are the two halves of the same response.
• B. The 2010 guidelines reversed the old A-B-C order to C-A-B precisely to eliminate the delay to compressions.
• C. Observing a pulseless patient wastes the only minutes that matter.
• D. Nothing is gained by waiting. Compressions are started at once and paused only for rhythm analysis and shock delivery.

Note: Defibrillation is the DEFINITIVE treatment for ventricular fibrillation and pulseless VT; CPR is what keeps the myocardium viable until the shock can be delivered. In the dental office this means an AED, an emergency drug kit and current BLS certification for the whole team.