Table 3.

Comparison of respiratory effects of chest wall strapping, obesity, and transplantation of oversized lungs

		Obesity (22)
Lung Function	CWS (1–10)	Mild, BMI 30–35	Moderate, BMI 35–40	Morbid, BMI >40	Oversized Transplant (36)
Lung Volumes
TLC, % predicted (SD)	66% (5)	93% (9)	92% (11)	88% (11)	65% (13)
FRC, % predicted (SD)	70% (6)	78% (13)	72% (13)	66% (12)	81% (22)
ERV, % predicted (SD)	50% (9)	42% (29)	29% (19)	24% (19)	55% (18)
Expiratory airflow	↑↑	↑ (33, 34)	↑ (33, 34)	variable	↑↑
Slope of expiratory flow–volume loop	↑↑	↑ (34)	↑ (34)	variable	↑↑ (37)
Lung elastic recoil	↑↑	↑ (24, 27, 28)	↑↑ (24, 27, 28)	↑↑ (24, 27, 28)	↑ (38)

Definition of abbreviations: BMI = body mass index; CWS = chest wall strapping; ERV = expiratory reserve volume; FRC = functional residual capacity; TLC = total lung capacity.

Supporting references are shown in parentheses, except SD where indicated.