My nephews 12 yr old son was hospitalized with 2 fractured ribs & a fractured sternum.  He has developed a gel-like substance in his lungs & a procedure will be performed tomorrow to determine what it is.  He has some issues with his lungs earlier today & they were unable to insert a tube because of the substance.
Welcome to Chat Doctor for your health concerns am Chat Doctor and I will look into your problem I have gone through your question and understood your concerns. After rib and sternum fracture he would have developed hemothorax (collection of blood in the pleural space). It is usually managed with inserting tube in the pleural space called tube thoracostomy. Some blood remain sun- Chat Doctor.  It is then evacuated with VATS (Video Assisted Horace- Scopy), otherwise it will result in emphysema (pus formation) and fibro-thorax. VATS is established and safe procedure, I think It will do the job for him, and he will better soon. I hope my answer will help you. Do rate it if you like it. Regards