an overall trendgold
21 , 28 , 30 , 36 , 48 Respiratory Outcomes Eight studies reported on respiratory function testing pre- and post administration of ESB showing an overall trend of improved values post ESB. 7 , 21 , 24 , 26 , 37 , 39 , 44 , 46 Adhikary et al reported an average improvement in incentive spirometry of 590mL which was maintained over the first 3 days post block. 7 This result was reflected in the study by Syal et al 39 who reported a similar magnitude of improvement in their measurements of inspiratory capacity.