Compared with group 1 , incisional ropivacaine infiltration combined with pulmonary recruitment manoeuvre significantly reduced dynamic pain at 0 hour , 4 hours , and 24 hours postoperatively ( 4.1 2.2 vs. 2.1 1.9 , P = 0.002 ; 2.7 2.7 vs. 1.2 1.3 , P = 0.035 ; and 3.5 2.1 vs. 2.1 1.8 , P = 0.03 , respectively ) .