Within the blood vessel s or lymphatics.
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in·tra·vas·cu·lar .in-trə-'vas-kyə-lər, -(.)trä- adj situated in, occurring in, or administered by entry into a blood vessel <\intravascular thrombosis> <an \intravascular injection> <\intravascular radionuclide therapy>
in·tra·vas·cu·lar·ly adv
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in·tra·vas·cu·lar (in″trə-vasґku-lər) within a vessel.Medical dictionary. 2011.