We have an inpatient who receives dalteparin 5000units via HD arterial port for ECC anticoagulation (three times weekly). Prescriber wants to put him on DVT prophylaxis which at our hospital is generally Fragmin 5000units SC daily or maybe for him, heparin 5000 units bid since he’s a hemo patient. It’s not clear to me how much systemic absorption there is of LMWHs when administered via arterial port. Is it your practice to give DVT prophylaxis 7 days per week despite a high dose ECC anticoagulant? Thanks!