Spousal maintenance is not an automatic entitlement during a property settlement. It can only be awarded by order of the court, if the party applies for it and can prove they will be in a situation of financial hardship as a result of the marriage. The court will look at the respective situations, the earning capacity of each, the future needs, etc, to decide if spousal maintenance is necessary. Ordinarily, spousal maintenance will also have a time limit, such as being paid until the property settlement is made.
As always, it's impossible to predict which way the court would rule, and this is especially true of spousal maintenance in your circumstances. For example, the court may want want to know if you received compensation for the botched operation and whether you're receiving any other support. I would advise getting legal advice so they can look over your situation and give guidance on the likelihood of spousal maintenance being ordered in your circumstances. Legal Aid offer free consultations, so it might be worthwhile organising an appointment with them.