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Publication Number
US-11224438-B2
Publication Date
2022-01-18
Expiration Date
Abstract
A method of implanting an occlusive device in a perforator vessel may include introducing a needle through skin of a patient, and advancing the needle into a perforator vessel, the perforator vessel extending between a superficial vein and a deep vein. The method may further include distally advancing a delivery component from within the needle until a distal end of the delivery component extends into the deep vein and releasing a distal portion of the occlusive device into the deep vein. The needle may then be proximally withdrawn from the perforator vessel such that the device is exposed within the vessel, and the proximal portion of the device may be released into the superficial vein such that the device blocks flow through the vessel.
Core Innovation
The disclosed invention relates to an endoluminal occlusion/stenting technology for treating a perforator vessel extending between a superficial vein and a deep vein. An occlusive device is implanted by introducing a needle through skin of a patient and advancing the needle into the perforator vessel, while a distal portion of a delivery component is advanced so that a distal end extends into the deep vein. The distal portion of the occlusive device is then released into the deep vein.
After distal release, the needle is withdrawn proximally so that the occlusive device is exposed within the vessel, and a proximal portion of the occlusive device is released into the superficial vein such that the device blocks flow through the vessel. In related embodiments, a catheter is advanced with the occlusion device supported thereon until a distal end enters or is positioned adjacent the deep vein, followed by releasing the distal portion from engagement with the catheter.
The occlusive implant is described as having an expandable frame and an occlusion membrane/cover that cooperate to block flow. The expandable/self-expandable frame uses proximal and distal members connected by link members so that expansion causes foreshortening and angular rotation to improve anchoring and provide immediate occlusion. The document also describes visualization and guidance options, including handheld ultrasound and guidewire-assisted entry, and it broadens the application scope to other luminal occlusions and stenting.
Claims Coverage
The provided claim set includes two independent claims. Across the independent claims, the main inventive features involve needle/catheter-based delivery into a vessel extending between a superficial vein and a deep vein, distinct distal release near the deep vein, proximal release/expansion into the superficial vein, and subsequent withdrawal of the needle to expose the device in the target vessel.
Needle introduction into a perforator vessel between superficial and deep veins with distal and proximal release
Introducing a needle through skin; advancing the needle into a perforator vessel extending between a superficial vein and a deep vein; distally advancing a delivery component from within the needle until a distal end extends into the deep vein; releasing a distal portion of an occlusive device into the deep vein; proximally withdrawing the needle from the perforator vessel such that the device is exposed within the vessel; and releasing a proximal portion into the superficial vein to block flow through the vessel.
Needle lumen delivery with catheter-supported distal positioning, distal release, then proximal expansion
Advancing a needle subcutaneously and into a target vessel extending between a superficial vein and a deep vein, the needle having a lumen with the occlusion device disposed therein; advancing the occlusion device out of the lumen to release the device into the target vessel, wherein advancing comprises advancing a catheter with the occlusion device supported thereon until a distal end enters or is positioned adjacent the deep vein; releasing a distal portion from engagement with the catheter; and releasing and permitting a proximal end portion to expand into the superficial vein.
The independent claims cover needle/subcutaneous access to a target vessel extending between superficial and deep veins, with separate distal release near the deep vein and proximal release/expansion into the superficial vein, followed by proximal withdrawal of the needle to expose the implanted device in the vessel.
Stated Advantages
Blocks flow through the vessel.
Provides immediate occlusion.
Documented Applications
Treating incompetent vessels, including varicose vein perforators, by implanting an occlusive device in a perforator vessel extending between superficial and deep veins.
Broad application scope beyond perforator occlusion, including stenting and other luminal occlusions.
Arteriovenous malformations/fistulas (AVF).
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