Commercial aircraft in the United States carry three categories of medical equipment: first aid kits for minor issues, an emergency medical kit with medications and diagnostic tools, and an automated external defibrillator. The FAA mandates all three under Part 121 regulations, which apply to scheduled commercial flights. Here’s exactly what’s on board and how it works.
First Aid Kits for Minor Injuries
First aid kits are the most accessible medical supplies on a plane. Flight attendants can open these without a doctor present, and they’re designed to handle cuts, sprains, and other straightforward problems. The number of kits scales with aircraft size: one kit for planes carrying up to 50 passengers, two for 51 to 150 passengers, three for 151 to 250, and four for anything larger.
Each kit contains 16 adhesive bandage compresses, 20 antiseptic swabs, 10 ammonia inhalants, eight 4-inch bandage compresses, five triangular bandages, one arm splint, one leg splint, four rolls of roller bandage, two rolls of adhesive tape, and a pair of bandage scissors. It’s basic wound care and stabilization, nothing more. Airlines can voluntarily add items beyond this minimum, but the FAA doesn’t require it.
The Emergency Medical Kit
The emergency medical kit (EMK) is a step up in seriousness, and it’s typically reserved for use by a doctor, nurse, or other qualified medical professional who happens to be on board. Every commercial aircraft must carry at least one. Inside, you’ll find a blood pressure cuff, a stethoscope, three sizes of oral airways (pediatric, small adult, large adult), a manual resuscitation bag with three matching masks, three CPR masks, an IV setup with saline solution, syringes, needles, a tourniquet, gloves, and surgical tape.
The medication list covers the emergencies most likely to happen at 35,000 feet:
- Epinephrine in two concentrations, for severe allergic reactions or cardiac arrest
- Antihistamines in both tablet and injectable form, for allergic reactions
- Aspirin (325 mg tablets), which can be given during a suspected heart attack to thin the blood
- Nitroglycerin tablets (0.4 mg), for chest pain caused by reduced blood flow to the heart
- Atropine, used when the heart rate drops dangerously low
- Lidocaine, a medication that helps stabilize irregular heart rhythms
- A bronchodilator inhaler, for asthma attacks or severe breathing difficulty
- Dextrose (concentrated sugar solution), injectable for dangerously low blood sugar
- A non-narcotic pain reliever (325 mg tablets)
This kit gives a medical volunteer enough to manage cardiac events, severe allergic reactions, breathing emergencies, and blood sugar crashes. It doesn’t cover everything, but it targets the situations where intervention during a flight can make the biggest difference.
Automated External Defibrillators
Every U.S. commercial aircraft has been required to carry at least one automated external defibrillator (AED) since April 2004. The device must be stored in the passenger cabin, not in cargo, so it can be reached quickly. AEDs analyze a person’s heart rhythm and deliver an electric shock if it detects a life-threatening pattern like ventricular fibrillation. They’re designed to be used by anyone, not just medical professionals, with voice prompts that walk the user through each step.
The FAA sets specific standards for AED battery packs because lithium batteries at altitude carry safety considerations. Power sources must meet FAA Technical Standard Order requirements, and the devices have to be maintained on the schedule set by their manufacturer.
What’s Notably Missing
The FAA’s mandatory equipment list hasn’t been updated since 2006, and that gap shows. Aircraft emergency kits lack several tools that have become standard in ground-based emergency care: automated blood pressure cuffs, pulse oximeters (the small finger clip that measures blood oxygen levels), blood glucose monitors, and epinephrine autoinjectors. A 2024 review published in aviation medicine research specifically recommended adding all of these.
The absence of a blood glucose monitor is particularly notable because injectable dextrose is already in the kit. A medical volunteer can treat low blood sugar but has no quick way to confirm the diagnosis first. Similarly, a pulse oximeter would be especially useful in a pressurized cabin where oxygen levels are already lower than on the ground.
Airlines are allowed to voluntarily add items beyond the FAA minimums, and some do. Lufthansa, for example, stocks a more comprehensive doctor’s kit that includes a fever thermometer and expanded diagnostic tools. But there is no requirement for any airline to go beyond the baseline list.
Oxygen for Medical Emergencies
Aircraft have supplemental oxygen built into their systems, primarily for cabin depressurization events (the overhead masks that drop down). For individual medical emergencies, portable oxygen is available from the crew. However, if you have a condition that requires continuous oxygen during flight, you need to bring your own FAA-approved portable oxygen concentrator (POC). Compressed oxygen tanks are not permitted on board. FAA regulations require that your POC battery can last at least 150 percent of the total flight time, and you must notify your airline in advance.
Ground-Based Medical Support
Perhaps the most important piece of “equipment” on a plane isn’t a physical object. Most major airlines contract with ground-based medical consultation services that flight crews can reach by radio or satellite phone. One of the largest, STAT-MD, handles roughly 16,000 calls per year from commercial, corporate, and private carriers.
When a medical event happens mid-flight, the crew relays information about the passenger’s symptoms to a physician on the ground. That physician advises on treatment using the supplies available on board and, if the situation is serious enough, helps determine whether the flight should divert. They can recommend the best alternate airport based on the plane’s location and the type of medical facility the passenger needs. In one documented case, STAT-MD physicians coached a flight crew through performing CPR and delivering AED shocks on a passenger. The pilot always makes the final call on whether to divert, but the ground physician’s recommendation carries significant weight.
The biggest limitation of this system is that the ground physician can’t see or examine the patient. Every assessment runs through secondhand descriptions relayed by cabin crew or a volunteer medical professional, which means the recommendations are inherently based on incomplete information. Blood pressure readings from the onboard stethoscope and cuff are often the only objective data available, which is why blood pressure measurement is the single most common medical activity performed during in-flight emergencies.