Walker slipped sideways on a patient, almost far enough to come out from under her.The wheels are made of hard plastic which slips easily.The rear wheels have a misalignment, both sides have toe out which forces the wheels to somewhat slip in order for the walker to travel in a straight line.This forced slippage further degrades the already weak grip of the plastic wheels.If the patients weight suddenly shifts, the wheel with more weight will suddenly grip better, and will drag the wheel with less weight on it, dragging it sideways, causing the walker to go side wards on the patient.A sudden weight shift by the patient can be the result of a near trip, near fall, or momentary loss of balance.This is the worst time to have the walker slip.The seat slips sideways.After repositioning it, it slips again.Brand medline.Model drive r800kd-bl.Sn: (b)(6).We are tying to get a warranty replacement but it is hell dealing with insurance companies, providers, and medical marketers.
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