Bed apparatus having movable bedboard

Details Bed apparatus having movable bedboard Bed apparatus having movable bedboard

2008-02-14

2010-11-16

Tweel, Jr., John A (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C005S618000

Reexamination Certificate

active

07834770

ABSTRACT:
A body weight threshold determination unit determines that the body weight of a user on a bed is at a body weight threshold or higher, and a center-of-gravity position area determination unit determines that the center-of-gravity position thereof has moved to an abnormal position (monitored area). In such a case, the bed user is detected to be in an abnormal position when a body weight center-of-gravity position monitoring unit detects that such a state has continued for a prescribed length of time or longer. When a back-raising operation has been carried out, a movable bedboard determination unit inputs the movable bedboard information, and a monitored area adjustment unit adjusts the monitored area. The monitored area is thereby constantly set to a suitable area in accordance with the state of the movable bedboard. In this manner, the combined information of the body weight information and center-of-gravity position information of the user is determined, whereby the movement of the user can be more accurately monitored with fewer misdetections, high detection accuracy, and high reliability in an electric bed having a movable bedboard.

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Barbenel et al.; “Monitoring the mobility of patients in bed”, Medical & Biological Engineering & Computing, Sep. 1985, pp. 466-468.

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