The distinction between distal and proximal relates to veins below and above the knee respectively. Patients with superficial venous thromboses such as the long saphenous and short saphenous are at risk of developing a<unk> , especially in patients who have a history of prior<unk>  although management with anticoagulation is controversial.
Proximal veins are the external iliac, common femoral, greater saphenous, profound femoral, (superficial) femoral vein, popliteal vein
If NO phlegmasia cerulea dolens:
Anticoagulate with heparin/coumadin x 3 months
If phlegmasia cerulea dolens:
Consider thrombolytics +/- thrombectomy
Anticoagulate with heparin/coumadin x 3 months
If anticoagulation contraindicated:
IVC filter
Anticoagulate with heparin/coumadin x 3 months
Consider thrombolytics +/- thrombectomy
Anticoagulate with heparin/coumadin x 3 months
IVC filter
Distal veins are the anterior tibial, posterior tibial, peroneal, gastrocnemius, soleus.
Symptomatic
Anticoagulate with heparin/coumadin x 3 months
Asymptomatic with extension of thrombus toward proximal veins
Anticoagulate with heparin/coumadin x 3 months
Asymptomatic without extension
Discharge with compressive U/S q2 weeks
2020 review from JAMA recommend treat calf<unk>  if "severe symptoms or risk factors for pulmonary embolism or extension to proximal veins (such as hospitalization, history of VTE, and cancer)."
Anticoagulate with heparin/coumadin x 3 months
Anticoagulate with heparin/coumadin x 3 months
Discharge with compressive U/S q2 weeks
Therapeutic LMWH or unfractionated heparin anticoagulation dose in:
Antepartum outpatient with multiple prior VTEs or any VTE with high-risk thrombophilia until 6 weeks postpartum
Postpartum inpatient with prior unprovoked, estrogen-provoked VTE, or low-risk thrombophilia for duration of admission
Lower prophylactic anticoagulation dose in:
Antepartum outpatient with prior unprovoked, estrogen-provoked VTE, or low-risk thrombophilia until6 weeks postpartum
Patients admitted > 72 hrs, not at high risk for bleeding or imminent delivery
Resume 12 hours after C-section and removal of epidural / spinal needle in indicated patients
Halt anticoagulation if imminent delivery, C-section, epidural / spinal needle
Antepartum outpatient with multiple prior VTEs or any VTE with high-risk thrombophilia until 6 weeks postpartum
Postpartum inpatient with prior unprovoked, estrogen-provoked VTE, or low-risk thrombophilia for duration of admission
Antepartum outpatient with prior unprovoked, estrogen-provoked VTE, or low-risk thrombophilia until6 weeks postpartum
Patients admitted > 72 hrs, not at high risk for bleeding or imminent delivery
Resume 12 hours after C-section and removal of epidural / spinal needle in indicated patients
Admit patients for vascular surgery and hematologist consult
Consider Greenfield IVC filter placement
Typically start heparin for additional anticoagulation
If secondary to catheter, do not necessarily have to remove 
Anticoagulation as per lower extremity<unk> s.
Patient should be admitted
Deep venous thrombosis
Arterial thrombosis
Venous thromboembolism
Arteritis
Lymphangitis
Arthritis
Phlebitis
Buerger disease