Pneumothorax from barotrauma

Patient with O2 dependent COPD, chronic respiratory failure, found to be profoundly hypoxic with sats of 35%.  Apparently his O2 tank was empty.  A CXR showed a left sided PTX, likely from barotrauma in conjunction with his COPD.  Barotrauma is defined as tissue injury caused by a pressure-related change in body compartment gas volume. Factors increasing risk of pulmonary barotrauma include certain behaviors (eg, rapid ascent, breath-holding, breathing compressed air) and lung disorders (eg, chronic obstructive pulmonary disease).

Would this coded as a tension pneumothorax or do I need to query?

Appreciate thoughts/suggestions!

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