squat bar

A U-shaped bar which can be attached to a birthing bed if a labouring woman wants to squat when she's ready to push the baby out. Some birthing beds already have this feature attached.
Found on http://www.babycentre.co.uk/glossary/s/

Squat Bar

A U-shaped bar that is attached to the hospital bed to help a woman in labor push the baby out of the vagina. To use a squat bar, the mother squats above the bed while grasping the bar for support.
Found on http://www.pregnology.com/AZ/S/5

Squat bar

A U-shaped bar that attaches to a birthing bed allowing a laboring
Found on http://www.whattoexpect.com/pregnancy/glossary/s.aspx
No exact match found