Thanks for your query.
He must have been operated for aspergilloma
of the lung. As per your history he is being given a trial of spontaneous breathing of 4-6 hrs per day. He is on weaning protocol. Gradually your doctor will increase the ventilator free hours and will be free after some days, if continue to remain stable. If unluckily he deteriorates, then again will be needed to put on ventilator. But why to think bad,,let god help him and if everything remains fine he will be off nentilator with in a week....