Adequate peripheral IV access (see Intravenous Cannulation for further details.
As the subclavian vein crosses the first rib, it lies posterior to the junction between the medial third and lateral two thirds of the clavicle.
The subclavian arteries are located posterior to the veins and are separated from them by the scalene muscles.
The right pleural dome is lower than the left and the thoracic duct is located on the left, thus making the right side preferred over the left.
Pneumothorax See Needle Thoracostomy for further details.