Maybe a portion of that system is what fell out of her pant leg?
That’s a possibility there is a ip that can be released to empty the bag.
A Freeper RN said that she thought the metal piece could be a clamp from a Foley catheter.
You might have the answer.
A FREEPER on another thread suggested that it may have been a Collie Clip. The Collie Clip is the base component of a multi-functional gripping and supporting system. It is small, light and easy
to use. Manufactured from surgical grade stainless steel, it is low maintenance and not prone to rust or corrosion.
With the available attachments, the Collie Clip can be used as an IV/blood bag holder, airway management tool,
urinary catheter holder, chest drainage bag holder, line or cable separator, swab bowl holder or a waste bag holder.