What does a rise in SPO2 to 90% or more indicate after an NCD?

A rise in SPO2 (oxygen saturation) to 90% or more after a needle chest decompression (NCD) indicates a successful resolution of tension pneumothorax. Tension pneumothorax occurs when excess air accumulates in the pleural space, leading to increased pressure that collapses the lung on the affected side and compromises respiratory function.

When an NCD is performed, it allows trapped air to escape, relieving the pressure in the pleural cavity. Following this procedure, monitoring SPO2 levels serves as an effective means to evaluate respiratory improvement. An increase to 90% or more suggests that the lung is re-expanding and that oxygenation is being restored, signifying that the intervention has effectively addressed the underlying issue. Thus, this increase in oxygen saturation serves as a clinical indicator that the life-threatening condition of tension pneumothorax is being successfully managed.