Long inflatable bed pan and Kelly pad

Hi! I have two questions. I have seen long and big inflatable bed pan. Can anyone tell what's the reason to make it so long ? Is it just for fun or there is some explanation ? Because normally rubber bed pans came in size just like others made of metal or plastic. Hard to find pictures so got only one link.

https://rubberfun.nl/1972-large_default/bed-pan-xl.jpg

Does anyone use Kelly pad in your activities during enema ? The main purpose of this device as I understand is wash patients hair during hospital time right ? Thank you !

https://www.appropedia.org/w/images/1/19/Kelly.jpg

The end of the sheet drops down into a bucket or basin.

Kelly pad is not intended for use with enemas or lose bowl movements. They are for blood flow management or shampooing the patients hair. I have used a bedpan in a medical situation. The small plastic disposable ones are unconformable for a big guy like me. The full size old version work very well.

What the OP's image link is basically a modern version of the Sitz Bath

In my opinion, inflatable bedpans are not really useful. While they are more comfortable than rigid ones and are probably OK if you are either pooing naturally or as a result of a Fleet or suppository, they are all but useless after you've gotten a bag enema. A big mess is almost guaranteed.