Coagulation studies, i.e. platelet count, @entity556 time (PT) and activated partial @entity556 time (aPTT) are commonly employed preoperatively to identify @entity1 at risk. In a retrospective study we evaluated the usefulness of these screening tests to predict @entity86 in 1447 @entity1 with abdominal and thoracic surgery. Forty-six @entity1 (3.2%) experienced postsurgical @entity548 . 12.2% of our @entity1 had @entity854 studies. The sensitivity of @entity854 studies with respect to @entity86 was 23.9%. The sensitivity of the parameter " @entity1 at risk", i.e. @entity1 with suspected @entity1003 due to @entity99 , was 56.5%. Thirty-four out of 1008 @entity1 without risk factors had @entity854 tests but an uneventful postoperative course. Preoperative screening of PT and aPTT should be reserved for @entity1 with known or suspected @entity3459 .

[Value of preoperative @entity1003 analysis for assessment of XXXX risk in general surgery].

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity556 :: ('2147', 'Gene') :: ['prothrombin', 'thrombin'] @entity548 :: ('MESH:D006470', 'Disease') :: ['bleeding'] @entity1003 :: ('MESH:D001778', 'Disease') :: ['coagulopathies'] @entity3459 :: ('MESH:D025861', 'Disease') :: ['inherited or acquired coagulopathies'] @entity854 :: ('MESH:D018376', 'Disease') :: ['abnormal coagulation'] @entity86 :: ('MESH:D019106', 'Disease') :: ['postoperative bleeding'] @entity99 :: ('MESH:D056486', 'Disease') :: ['drugs or disease of the liver or kidney']
@entity548 :: (MESH:D006470,Disease) :: ['hemorrhage']
