The length of time an IVC filter stays in place after implantation is referred to as dwell time.
There is no dwell time that prohibits IVC filter removal. However, it is true that a longer dwell time could increase the complexity of IVC filter retrieval and increase the likelihood of unsuccessful retrieval. For this reason, most physicians recommend consultation for IVC removal at the earliest possible time interval after it is no longer needed. This is ideally within 3-6 months of placement. Prolonged dwell times exceeding 1 year do not prohibit removal. However, this should warrant a detailed conversation with the interventionalist regarding benefits of removal and possible risks.
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