I dealt with this recently. Pt ESRD w/SBO s/f exlap had no iv access from the floor and was brought directly to OR due to cdiff (we can’t hold them in preop). She was demented & delirious - ripping everything out & family wanted everything done. She had already been poked everywhere and was covered in bruises. I was struggling to get an awake central line due to squirming/retching and bilateral stenosis of the IJ. She had an Avf on the left arm - my partner suggested access vs PIV below. She couldn’t get the PIV, but, if there was a vascular surgeon around (strangely none that day), I would have asked them to assist with accessing the AVF temporarily. I did not feel comfortable poking it. Eventually, I got a central line in.
In retrospect, subq sedation could have been helpful for the situation.