How to fix a collapsed lung in the middle of nowhere? If in a town there is only one doctor and he does not have the fancy equipment how and what can he use to save the person with the collapsed lung?

If . If i were in a location where someone had a collapsed lung, at the very least, betadine, if available, and an 18g angiocath needle would suffice to emergently release air from the pleural space and allow the collapsed lung to reexpand. This is of course merely a temporary maneuver, depending on the size of the injury to the lung. I would only try this maneuver if i had the proper skills and education as to the location of the lung, major blood vessels and after weighing the risks and benefits. But, in the case of do or die, a needle placed in the lateral midaxillary line or two fingers width "south" in relation to the clavicle, should adequately allow a needle to be safely inserted into the pleural space. (hopefully, too, one has a stethoscope to ensure the correct side is treated!).
There . There are several different forms of pneumothorax or "collapsed lung." many pneumothoraces are small enough that they can simply be observed with serial chest x-rays. Treatment only becomes necessary if the pneumothorax gets larger or becomes symptomatic. An open pneumothorax (a hole in the chest wall) can usually be addressed with an occlusive dressing (vaselne gauze, plastic bag, tinfoil, etc.) that is applied to the wound and taped down on the top and two sides, creating a flutter valve. Transport to definitive care can then be arranged. A symptomatic closed pneumothorax can be temporarily addressed with a "dart" consisting of a large-bore IV catheter and some sort of flutter valve (the split finger of a rubber glove works when nothing else is available) inserted through the chest wall. This helps to prevent the development of a tension pneumothorax (where air gets trapped inside the chest with each successive breath, leading to increasing pressure within the chest cavity and respiratory and cardiovascular collapse). If a tension pneumothorax does develop, suction can be attached to the IV catheter or a large-bore needle with a big syringe can be used to evacuate the air from the chest cavity. In all cases of pneumothorax, supplemental oxygen is administered. Physicians who practice in isolated areas usually have the wherewithal to insert chest tubes when necessary, or they have established protocols for rapid evacuation of critical patients. I hope that helps!