Retention of pleural effusion after hepatectomy is an important compli
cation that may affect the postoperative course. However, there are fe
w reports on its pathogenesis or preventive measures. We evaluated the
mechanism of the development of this complication and preventive meas
ures against it. During the past 4-year period, hepatectomy was perfor
med in 77 patients, of whom 64 underwent liver mobilization by transec
ting the hepatic ligaments. A fibrin sealant was sprayed on the cut su
rface of the hepatic ligaments in randomly selected 25 of the 64 patie
nts to determine whether this application can prevent postoperative re
tention of pleural effusion. Post-operative pleural effusion was not o
bserved in any patient treated by fibrin sealant spraying but was obse
rved in 13 (30%) of the other 39 patients treated with this sealant (p
< 0.05). In addition, none of the 23 patients in whom the liver was n
ot mobilized during hepatectomy showed postoperative pleural effusion.
These results suggest that severance of the hepatic ligaments is a ma
jor cause of pleural effusion, and application of a fibrin sealant to
the undersurface of the diaphragm around the insertion of the liver li
gaments is useful for preventing this complication.