the incidence of fatal pulmonary embolism was 3.5 per cent in the 403 patients who reveived no heparin and 0.0 per cent in the 147 patients who were treated by the currently used regimen of prophylaxis , as follows : with the dose modified according to the coagulometer-test time , patients received 2,500 units on admission and every six hours until the day before operation .
C0034065
pulmonary embolism
C0019134
heparin