1. Crouch implement change sit implement, accept osculum restriction.

2. When transforming, can keep former crouch implement osculum , the good model canal that buries 80 millimeter left and right sides beforehand additionally collects water at crouching implement.

3. The mattress is equipped with an osculum (4) running from top to bottom and a defecation hole (6) positioned on the hip of the patient.

4. Osculum is in hind on side wall, it is back row water, this bit is very important.

5. Means of back row water, want to measure its ground to be apart from, show osculum center arrives finish the distance of the ground.