A household that depends on powered medical equipment is not doing ordinary outage planning. The consequence of a wrong assumption is not spoiled food — it is an interruption in treatment. That changes the method: every number in your plan must come from a clinician, the device manufacturer, or the supplier, and the plan’s job is to have those answers written down before the power fails.
This page is the all-hazard planning frame. It contains no medical advice, no runtime guarantees, and no substitutions. It is a set of questions and a structure for the answers you obtain from people qualified to give them. The household-wide outage plan — power, light, food, communication — lives in the power outage preparedness hub; this plan covers the one load that cannot wait.
Seasonal variants specialize this plan: the winter medical-device and vulnerable-household plan adds cold, and the heat power-outage plan adds heat. The CPAP backup planning questions work one device in depth.
If treatment is failing right now
Call 911 if a person’s condition is deteriorating, if required treatment cannot continue, or if you are unsure. Do not spend the outage troubleshooting equipment while someone declines.
Follow the clinician’s emergency instructions and the device manufacturer’s documented procedure. FDA advises device users to plan for power, moisture, contamination, and supply continuity in emergencies, and to follow the device labeling. (Source: FDA, Emergency Situations and Medical Devices.)
Do not improvise a substitution, a setting change, or a workaround because a device is unavailable. If the plan has failed, the answer is professional help or relocation, not invention.
Build one inventory before anything else
You cannot plan power for equipment you have not listed. Build a single record covering every powered item that treatment depends on.
For each device, record:
| Field | Where the answer comes from |
|---|---|
| Device, model, serial | The device itself |
| What happens if it stops, and how quickly | Clinician |
| Required hours per day and time of day | Clinician and normal use |
| Measured running watts | Measurement, not the nameplate |
| Startup surge behavior | Manufacturer or observed test |
| Approved power sources (mains, DC, battery, adapter) | Manufacturer |
| Approved backup battery and its real runtime | Manufacturer |
| Consumables and their reserve | Supplier |
| Alarm behavior on power loss | Manufacturer |
| Whether it can run while charging | Manufacturer |
The middle column matters more than the left one. A preparedness article can tell you to measure watts; only a clinician can tell you how long a person can safely go without the therapy, and only the manufacturer can tell you which power source will not damage the device or void its function.
Measure the load, never guess it
Nameplate ratings describe a maximum design value, not normal consumption, so a plan built on them is wrong in both directions. DOE recommends measuring actual use where practical. (Source: U.S. Department of Energy, Estimating Appliance and Home Electronic Energy Use.)
Use a plug-in watt meter on ordinary cord-connected equipment, within the meter’s rating and the device’s instructions. Then feed the measured figures into the backup power load worksheet.
Two hard limits apply:
- Do not disconnect life-sustaining equipment to measure it. If measuring means interrupting therapy, do not measure — ask the supplier for documented figures instead.
- Measured watts are an energy input, not a clinical guarantee. They tell you how long a battery might last. They do not tell you how long the person can wait.
Ask the clinician, manufacturer, and supplier directly
These are the questions whose answers become your plan. Ask them at a routine appointment, not during an emergency.
Clinician:
- How long can this therapy be interrupted, and what are the warning signs?
- At what point do we go to a hospital or a facility rather than continue at home?
- What changes during heat, cold, smoke, or illness?
- What must never be improvised or substituted?
Manufacturer:
- Which external power sources are approved for this exact model?
- What is the approved battery, and what runtime is documented at our settings?
- Can it operate while charging? What happens on power loss?
- What are the temperature, humidity, and cleanliness limits?
Supplier / pharmacy / utility:
- What is the emergency contact and after-hours procedure?
- How fast can consumables or a replacement be delivered during a regional event?
- Is there a utility medical registry or baseline program, and what does it actually provide?
Write the answers down. A plan that lives in someone’s memory is not a plan.
Register with the utility’s medical program where one exists, while understanding its limit: registration may not guarantee faster restoration. Treat it as one input, never as the plan.
Power the device without creating a second emergency
Layer the plan rather than relying on one source:
- Manufacturer-approved batteries and DC adapters first. They are designed for the device.
- A portable power station may support some equipment, subject to continuous output, surge, waveform, port, and grounding requirements — all of which the manufacturer, not a spec sheet, must confirm. See the backup power hub.
- A generator is a separate hazard plan, not a power source you simply add. It never runs indoors, in a garage, or near openings. Read the generator carbon monoxide warning first; the alarm response guide covers what happens if it goes wrong.
- Never feed household wiring through an improvised cord, and never backfeed. Any transfer arrangement requires listed equipment and a qualified electrician.
- Oxygen changes everything. Where oxygen is in use, fire and ignition rules dominate: no flame, no smoking, no petroleum products on equipment, and battery lights rather than candles. Follow the supplier’s written instructions.
Reserve the battery for the device. Communication, refrigerated medication, and a light are the other loads worth protecting — everything else can wait. The outage load-reduction guide explains how to protect that reserve.
Write the trigger table
The most valuable page of this plan is the one that decides when to stop trying. Decide it in advance, in calm conditions, with the clinician.
| Trigger | Who decides | Action |
|---|---|---|
| Clinical warning sign appears | Clinician’s stated criteria | Call 911 or follow the emergency instruction |
| Backup reserve falls below a defined level | Written in advance | Relocate while transport still works |
| Consumables reach a defined reserve | Supplier’s lead time | Resupply or relocate |
| Medication temperature excursion | Pharmacist / manufacturer | Follow the refrigerated medication plan |
| Home becomes too hot or too cold | Clinician + household plan | Relocate to a facility or safe destination |
| Transport or roads may close | Local authority | Leave earlier than feels necessary |
The recurring mistake is waiting until the situation is bad to decide. By then the reserve is spent, the roads are worse, and the person is less able to travel. The trigger table exists so that nobody has to make a judgment call under pressure.
Plan the destination and the trip
Relocation is a legitimate primary plan, not a failure. Decide in advance:
- two destinations that can support the equipment, with their requirements confirmed;
- how the person and equipment travel, including who carries what;
- what goes in a grab bag: device, approved batteries, adapters, consumables, medication list, clinician and supplier contacts, and the written plan;
- who assists someone who cannot self-evacuate;
- how the household communicates if phones are unreliable — see the family communication plan.
CDC’s preparedness guidance for people with specific personal needs covers medication, assistive technology, and device planning as its own category rather than a footnote. (Source: CDC, Personal Needs.)
Rehearse without interrupting treatment
A plan nobody has practised is a document. Rehearse the parts that carry no clinical risk:
- locating the plan, the grab bag, and the batteries in the dark;
- confirming the backup connects and the device alarms as documented;
- checking that everyone knows the triggers and who calls whom;
- verifying contacts are current.
Do not rehearse by interrupting therapy, cycling a life-sustaining device, or testing a substitution. Ask the supplier how to verify readiness without risk.
Review the plan after any change of device, settings, clinician, supplier, home, or household member — and at least once a year.
What this page will never do
It will not tell you how long a person can go without treatment. It will not endorse a battery, adapter, or power station for a specific device. It will not offer a substitution when a device or medication is unavailable. And it does not replace the clinician, the manufacturer’s labeling, the supplier, or 911.
What it does is make sure that when the power fails, the answers already exist on paper — obtained from the people qualified to give them, while everything was calm.
Sources reviewed
ReadyLience reviewed current FDA guidance on medical devices in emergency situations and natural disasters, CDC guidance on emergency power sources and personal needs, and Ready.gov disability preparedness guidance. This page contains no medical advice and no clinical thresholds; every runtime, interruption tolerance, approved power source, substitution, and evacuation trigger must come from the treating clinician, the device manufacturer’s labeling, and the supplier. Utility medical registration is described as one input that may not guarantee faster restoration. The page is critical-risk and remains in expert review pending a recorded qualified medical review; no product is recommended.