What are the causes of pulmonary embolism?

For long-term bed, malnutrition, diarrhea, dehydration of children prone to pulmonary embolism, there may be children with deep venous thrombosis caused by lower limbs, do not rule out the possibility of genetic inheritance; children should be timely thrombolytic, anticoagulant therapy, thrombolytic therapy ineffective children, but also need to use thrombectomy treatment.