Yes. Currently, most protocols for the treatment of DVT do not include thrombolysis unless the clot is very extensive.
Yes. Depending on the severity of the blood clot, thrombolytic agents can be given either systemically (through an iv) or directed at the clot itself via a catheter. Some data support better outcomes when they are directly aimed to bust open a clot where it exists, but this is dependent on the expertise of the center you are being treated at. In general, thrombolysis is reserved for severe cases.
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