A question about injuries! How badly wounded must someone be before they're transported off the battlefield? And how quickly will these injuries be patched up?

Basically, there's going to be a clash between Link and Nu, and Link is going to come off the worst for it. Will just being sliced up be enough that he can no longer fight be enough to get him away, or would it have to be a near-fatal injury? If the droids stitch him up (or... whatever they do), would he be sent back on the field right away, or would he need a healer then go back up, or will he be able to rest a bit? And if so, for how long?

Sorry about all the questions! Just trying to work out what, exactly, will be going on.