 The posterior left chest wall was prepped and draped in the usual fashion and then a mixture of 1% Xylocaine 20 mL and Marcaine 0.25% 20 mL were mixed together and the intercostal spaces from the fourth to the tenth ribs were anesthetized. 
The posterior left chest wall was prepped and draped in the usual fashion and then a mixture of 1 % Xylocaine 20 mL and Marcaine 0.25 % 20 mL were mixed together and the intercostal spaces from the fourth to the tenth ribs were anesthetized .