In the Field
Finger thoracostomy is what you do when the needle does not work. TCCC 2026 acknowledges that needle decompression fails more often than the doctrine likes to admit, particularly in muscular casualties, in the second intercostal space site, and when the needle catheter kinks or clogs. Finger thoracostomy is a definitive decompression at the same anatomic location used for chest tube placement, just without the tube. You make the incision, blunt-dissect through the muscle layers, push your finger through the parietal pleura, and air or blood escapes.
Common Mistake
Reaching for finger thoracostomy before exhausting needle decompression options. TCCC 2026 specifies a stepwise approach: needle at one site, then needle at the other site, before escalating to finger thoracostomy. The procedure is more invasive, harder to perform under stress, and requires significantly more training. The other mistake is failing to maintain patency. The incision can seal itself with tissue or clot, and re-decompression through the same incision may be required.
Technical Detail
Procedure: identify 5th intercostal space in the anterior axillary line (typically at nipple level in males, inframammary fold in females). Local anesthetic if available and patient conscious. Make a 4 cm horizontal incision over the rib below the target ICS. Use Kelly clamp or hemostat to bluntly dissect through subcutaneous tissue and intercostal muscle, riding just above the upper edge of the lower rib to avoid the neurovascular bundle. Push through the parietal pleura with the closed clamp tip, then open. A rush of air confirms decompression. Insert finger to confirm position in pleural space and sweep for adhesions. Leave wound open or cover with three-sided occlusive dressing. Trans-incision finger re-decompression may be repeated. TCCC 2026 explicitly lists finger thoracostomy as an option for refractory shock from suspected tension pneumothorax, qualified by skills, experience, and authorizations of the treating provider.
