Percutaneous, ultrasound-guided introduction of medical devices
First Claim
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1. A system for delivering a vascular filter to a target site in a patient, the system comprising:
- a sheath introducible through a percutaneous access site of the patient, the sheath having an inner lumen and a distal tip, the sheath having an echogenic marker located proximate the distal tip and a first series of visible indicia occurring along a first longitudinal region of the sheath, the first longitudinal region positioned to include a location aligned with a reference point external of the percutaneous access site when the distal tip of the sheath is at the target site;
an intravascular ultrasound device configured for slidable receipt through the inner lumen of the sheath and having an intravascular ultrasound probe in a distal region thereof for generating an ultrasound image signal for identifying the target site;
a filter introducer configured for slidable receipt through the inner lumen of the sheath, the filter introducer including a filter delivery instrument and a vascular filter carried by the filter delivery instrument;
wherein the vascular filter includes a first echogenic marker, and a second echogenic marker longitudinally spaced a distance from the first echogenic marker; and
wherein the filter includes a hub and plurality of struts emanating from the hub, and wherein the first echogenic marker is provided on the hub.
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Abstract
Described are methods and systems and system components useful for percutaneously delivering or retrieving vascular implant devices, such as filters, utilizing intravenous ultrasound (IVUS) imaging alone or in combination with external (e.g. transabdominal) ultrasound or other imaging technology. Implants deliverable by such systems, such as vena cava or other vascular filters, can have two or more echogenic markers spaced at such a distance that they are separately discernible by IVUS and/or external ultrasound imaging.
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Citations
16 Claims
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1. A system for delivering a vascular filter to a target site in a patient, the system comprising:
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a sheath introducible through a percutaneous access site of the patient, the sheath having an inner lumen and a distal tip, the sheath having an echogenic marker located proximate the distal tip and a first series of visible indicia occurring along a first longitudinal region of the sheath, the first longitudinal region positioned to include a location aligned with a reference point external of the percutaneous access site when the distal tip of the sheath is at the target site; an intravascular ultrasound device configured for slidable receipt through the inner lumen of the sheath and having an intravascular ultrasound probe in a distal region thereof for generating an ultrasound image signal for identifying the target site; a filter introducer configured for slidable receipt through the inner lumen of the sheath, the filter introducer including a filter delivery instrument and a vascular filter carried by the filter delivery instrument; wherein the vascular filter includes a first echogenic marker, and a second echogenic marker longitudinally spaced a distance from the first echogenic marker; and wherein the filter includes a hub and plurality of struts emanating from the hub, and wherein the first echogenic marker is provided on the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification