Most walkers fail at a doorway or a corner, not in the middle of an open room. The house decides whether the device fits, and the measurements take about twenty minutes. Do them before the order goes in, not after the delivery truck leaves.

Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.

The three numbers that matter

Measure the narrowest clear width of each doorway you expect the device to pass through, from the door stop on one side to the edge of the open door on the other, not from the frame. Then measure the narrowest part of the hall, and the width of the bathroom door with its swing noted. A doorway that is wide enough when the door is open to ninety degrees may still pinch when the door is at a steeper angle, so test the door position you actually use.

The turn is the real test

Mark where the device must turn: the end of the hall, the corner by the kitchen, the space beside the bed, and the bathroom entry. Ask the supplier for the open width and the length of the device, and for the folded size if it folds. Lay painter's tape on the floor at the device's width and walk the outline through the turn. If the outline touches furniture, a door frame, or a rug edge, the path needs work before the device arrives.

Who decides the fit

Handle height is set with the person standing in a relaxed position, and the device should be adjusted by the supplier or a therapist who will make that adjustment in writing. Ask who will set the height and whether the first walk-through is included. The person who will use the device should try it inside the house, not in a showroom, because the showroom floor does not have a rug edge or a step down.

What to do tonight

Get a tape measure and record three numbers: the narrowest doorway, the narrowest part of the hall, and the bathroom turn. Send the numbers to whoever will supply the device, and ask them to confirm the device fits through each one before the order is placed. If you cannot be there for the test, ask a local helper to walk the route with your parent and send you a photo of the turn.

What to leave with the doctor

Ask the doctor whether a walker or rollator is the right type of device for your parent's walking, and whether a therapist should check the fit in the home. Bring the three measurements and the turn sketch so the appointment does not depend on memory.