Conical vena cava filter with jugular or femoral retrieval
A removable intravascular filter having a filtering configuration for capturing thrombi in a blood vessel and a retrieval configuration for removal from the blood vessel. The filter may be implanted in a patient's vena cava and may be removed from the vena cava through the patient's jugular or femoral vein. A method of removing an intravascular filter from a patient's vena cava through the patient's femoral vein is also provided.
1. A method for retrieving an intravascular filter from a patient's vena cava through the patient's femoral vein, the method comprising:
percutaneously inserting a retrieval assembly into the patient's vasculature through the patient's femoral vein, the retrieval assembly comprising a retrieval sheath and a control member;
advancing the retrieval assembly through the patient's vasculature to a retrieval position proximal to the intravascular filter in the patient's vena cava, the intravascular filter being in a filtering configuration and comprising:
a plurality of struts having first and second ends, the first ends of the struts being attached together along a longitudinal axis, the second ends of the struts being attached together along the longitudinal axis, each strut having a first portion, a second portion, and a third portion, the third portion of each strut being substantially linear and having a bending region substantially straight in the filtering configuration, the first portion extending laterally away from the longitudinal axis and generally upstream from the first end, the second portion extending generally upstream from the first portion, the third portion extending inwardly toward the longitudinal axis and generally downstream from the second portion to the second end, the first portion and the third portion being substantially parallel in the filtering configuration;
a first coupling element disposed with the first ends of the struts for jugular vein retrieval; and
a second coupling element disposed with the second ends of the struts for femoral vein retrieval;
attaching the control member to the second coupling element of the intravascular filter;
retracting the control member proximally through the retrieval sheath to apply tension to the second coupling element, the tension moving the intravascular filter from the filtering configuration to a retrieval configuration, each strut extending generally upstream from the first end to the second end when the filter is in the retrieval configuration;
advancing the retrieval sheath distally over the intravascular filter; and
removing the retrieval assembly and the intravascular filter from the patient's vasculature.
2. The method of claim 1 , wherein said moving the intravascular filter from the filtering configuration to the retrieval configuration comprises bending the bending region of each strut.
3. The method of claim 2 , wherein said bending the bending region comprises bending the bending region away from the longitudinal axis.
4. The method of claim 2 , wherein said bending the bending region comprises bending the bending region toward the longitudinal axis.
5. The method of claim 1 , wherein the second portion is shorter than each of the first portion and the third portion.