How soon after you suffer a Critical Injury can you take medical care to recover? Does the "once per week per Critical Injury" mean that you can roll a Medicine/Mechanics check right after the fight in which you were injured? And if you fail to recover, you must wait a week before trying again?

Also, how long would a check like this take? A few seconds? A few minutes? Longer?

How soon after you suffer a Critical Injury can you take medical care to recover? Does the "once per week per Critical Injury" mean that you can roll a Medicine/Mechanics check right after the fight in which you were injured? And if you fail to recover, you must wait a week before trying again?

Also, how long would a check like this take? A few seconds? A few minutes? Longer?