I've been put down to have this surgery now so I thought I'd start a thread to share what happens in case it helps someone later on
The sagittal bands are ligament attachments that run across the back of your hand between the knuckles - their purpose is to keep the extensor tendons centred over the knuckle so you get the leverage when bringing your finger from curled up (flexion) to straight (extension). If one of them stretches then the matching one on the other side of the affected tendon doesn't have anything to pull against, so the tendon 'falls off' the knuckle when you bend the finger, and hopefully comes back to the centre when you extend it again. If it tears completely then once it's fallen off the knuckle it won't go back to its correct position of its own accord, so you don't get the leverage and you're unable to straighten your finger again - you have to use your other hand to push it straight again once you've bent it.
I strained one of these ligament a couple of weeks back doing some DIY - it hurt at the time (sharp pain behind knuckle) and didn't get much better so I rang my hand therapist who panicked a bit
There's some diagrams and videos (fair warning - surgery videos not good if you're squeamish!) online - the video page shows the problem in a not-gory way so that might be handy if my description wasn't any good!
The basic idea of the surgery is that they use a cut a sliver off the extensor tendon and wrap it around a neighbouring ligament to give the right amount of tension before reattaching it - in theory at least that then restores the pull on the stretched side and brings the tendon back central again. The surgeon is one of the UCHL ones (I was seen as an extra on the fracture clinic) and was really nice - good at explaining and receptive to me asking nicely to make sure I'm sutured carefully (apparently she's going to use a mattress suture, which holds the wound edges together more tightly than normal). I have issues both with GA and local anaesthetic so I'm going to have a review with the anaesthetist before they do it - then they'll decide which to go for as the surgeon didn't mind. She did say if I had it done under local I'd be allowed to watch
I'll keep updating as I go along and hopefully it'll be useful to someone
Stone
