9.2 Oxygen, Glucose, and Assisted Medication Tasks

Matching the Drug to the Emergency

Medication items on the EMR exam are really assessment-flow items. The scenario describes a problem — low oxygen, low blood sugar, an opioid overdose, cardiac chest pain, or anaphylaxis — and the right answer ties the correct EMR drug to that finding at the right dose and route. Patient Treatment and Transport is weighted at roughly 20-24% of the exam, so drill these as field sequences, not flash cards.

Oxygen is titrated, not poured on. The goal is an SpO2 of at least 94%, delivered by nasal cannula (1-6 L/min), simple mask (5-10 L/min), or non-rebreather (10-15 L/min). In a patient with suspected COPD, a lower target of 88-92% is reasonable to avoid blunting respiratory drive. The key trap: if breathing is inadequate (too slow, too shallow, agonal), a mask is not enough — the patient needs assisted ventilation with a bag-valve mask. Oxygen never substitutes for opening and managing the airway.

Glucose, Naloxone, and Epinephrine

Oral glucose treats suspected hypoglycemia (the diabetic patient who is shaky, sweaty, confused, or combative). The dose is 15-25 g of gel or liquid, but the gatekeeper is airway safety: give it only if the patient is awake and can swallow and protect the airway. A confused, seizing, vomiting, or unresponsive patient must not receive oral material because of aspiration risk; those patients need ALS for IV dextrose or glucagon.

Naloxone (Narcan) reverses opioid overdose. The classic picture is depressed mental status, slow or absent breathing, and pinpoint pupils. The EMR priority order is to support ventilations with a BVM first, then give naloxone — commonly 4 mg intranasal spray or an IM dose per protocol — and reassess in about 2-5 minutes, repeating if breathing has not improved. Naloxone is considered very safe across ages; the danger is forgetting that oxygenation, not the drug, is the immediate lifesaver.

Anaphylaxis is a true emergency: hives plus airway swelling, wheezing, or shock after an exposure. The EMR assists the patient's epinephrine auto-injector into the anterolateral thigh — 0.3 mg for an adult, 0.15 mg for a child under about 66 lb (30 kg). Symptoms can rebound, so reassess and be ready to assist a second dose if protocol allows, request ALS early, and treat developing shock.

Reassess, Then Hand Off

A medication is never the end of the call. After any allowed intervention, reassess: Did breathing ease? Did mental status improve? Did the patient deteriorate or develop a new complaint? These observations become documentation and are repeated at handoff. "Assisted epinephrine 0.3 mg at 1412, breathing improved, no second dose" is far more useful than "gave the EpiPen."

Exam writers like choices that sound helpful but are incomplete — assist a medication but skip assessment, or wait for the ambulance while the patient worsens. Choose the action that manages immediate risk, uses the correct drug, dose, and route, stays in the EMR role, reassesses, and prepares the next clinician. Build a five-part habit for every medication item: assessment clue, scope limit, correct dose/route, reassessment finding, and the one-sentence handoff.

Two More Time-Critical Pictures

Cardiac chest pain and stroke deserve a closer look because both are time-critical and both have an EMR action. For suspected acute coronary syndrome, the patient describes chest pressure, heaviness, or discomfort, possibly with shortness of breath, nausea, sweating, or pain radiating to the arm or jaw. The EMR keeps the patient calm and at rest, gives oxygen if hypoxic, administers chewable aspirin 162-324 mg when there is no allergy or active bleeding, may assist the patient's own nitroglycerin per protocol after checking blood pressure, and requests ALS early because definitive care is at the hospital.

Stroke is recognized with a screening tool. The classic mnemonic is FAST — Face droop, Arm drift, Speech difficulty, Time to call — and the expanded BE-FAST adds Balance loss and Eye/vision changes, which improves detection of posterior-circulation strokes that plain FAST can miss.

The single most important stroke data point the EMR captures is the time the patient was last known well, because it drives the hospital's treatment window. There is no EMR drug for stroke — the intervention is rapid recognition, airway and breathing support, and fast transport with that time recorded and reported.