The problem of pulmonary embolism:  evaluation of vena caval ligation.
D006801:Humans; D008026:Ligation; D011655:Pulmonary Embolism / Q000601:surgery*; D013927:Thrombosis; D014684:Venae Cavae / Q000601:surgery*
PULMONARY EMBOLISM and THROMBOSIS/surgery; VENAE CAVAE/surgery