Needle decompression of tension pneumothorax animated demonstration
Sterile gloves, gown, and protective eyewear
Antiseptic for skin preparation
Large-bore intravenous cannula: 16-gauge or 14-gauge
10 mL Luer lock syringe.
The second, definitive step of this procedure will be insertion of an intercostal chest drain. Be prepared to insert an intercostal chest drain, or call for help to do so, after successful emergency needle decompression.
Blood control (closed system) intravenous cannulas must not be used to decompress a tension pneumothorax. These intravenous cannulas contain an integral septum that closes when the needle is withdrawn, preventing air flow out of the pleural cavity.
None if tension pneumothorax is diagnosed. This condition is life-threatening, and time is of the essence.
If the clinical history and examination findings are not suggestive of tension pneumothorax, seek an alternative diagnosis.
Needle decompression of the gas-filled pleural cavity is performed only when there is suspicion of a tension pneumothorax.
Laceration of the lung
Failure to decompress
Kinking or blocking of the cannula and recurrence of the tension pneumothorax.
Reassess the patient after insertion of the cannula, using the observe, palpate, percuss, auscultate technique. In some cases, the needle decompression is insufficient to relieve the tension pneumothorax and insertion of an intercostal tube is needed immediately to provide adequate relief. 
Some causes of needle decompression failure are:
Insufficient length of the cannula
Obstruction (blood, tissue, kinking)
Missing a localised tension pneumothorax
Air leaks from the lung faster than it can drain through the cannula
Requirement for repeated needle decompression.
It is important to perform definitive treatment with an intercostal chest drain immediately after decompressing a tension pneumothorax.