My elderly DM is having a removal/refit of her bladder pessary this afternoon.
She’s absolutely riddled with arthritis, scoliosis, and a SA survivor.
The last few times she’s had it done it’s been agony for her. She’s been distressed and in pain which has affected her (limited) mobility.
I’ve rang the ward to request she be offered Nitrous Oxide. She has no contraindications and has used it before after a fall.
I’ve been fobbed off, told ‘we can’t give that cos we’ll have to look at all her medications/history’. 
I’ve emailed PALS (no one to answer the calls) but REALLY worried.
Can anyone advise please?