You need to clarify. What is the lung damage? Is it collapsed? Scarred? cavitated?
What is the cause of this damage? Has the cause been treated or is it still active? Is it due to Tuberculosis?
Lung resection has to be carefully planned. What is the situation of the other lung? Is it completely normal or partly damaged? Not all damaged lungs need to be operated. Simple techniques such as postural drainage
can help in handling the situation.