protect your backs

A few days ago my supervisor and I went to see a patient who was day 2 post TKR. She is on a clinical pathway and therefore the aim for day 2 is to walk a few steps and start her knee exercises. However she was in too much pain on day 1 to stand so this was her first time getting OOB. This patient however is quite stubborn and impulsive and also weighs 170kg. After getting the doctors in to convince her to at least try standing up, she did so very reluctantly. However after a few seconds standing up she tried to sit back on the bed without telling us. As a result she nearly missed the bed and we had to really try hard to stop her falling. She's quite a short lady with little legs and therefore couldnt push off the ground to get back on the bed so we had to sort of 'pull/lift' her back on the bed. I was behind her and in charge of her trunk and as a result got quite a sore back. I think it's a tricky situation because obviously you cant let a patient fall and she was in severe pain and trying to get back into bed straight away, however you always have to make sure you protect yourself as well, especially your back. In hindsight we probably should have anticipated her having difficulty getting back into bed and asked the nurse to be around in case we needed a third pair of hands to help just to make sure everyone involved stayed safe.