Microvalve protection device and method of use for protection against embolization agent reflux

A valve seat, therapy technology, applied in the field of medical embolization therapy systems, which can solve the problems of increased complexity, slow delivery, and changes in local flow conditions that cannot be controlled by doctors

Active Publication Date: 2012-09-12
TRISALUS LIFE SCI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extended time, increased complexity, increased x-ray dose to the patient and physician (longer-term monitoring of the patient) and the potential for reduced efficacy make slow delivery of embolic agents suboptimal
Also, dose reductions often result in the need for multiple follow-up treatments
Even when the physician seeks to reduce the amount of backflow, the local flow conditions at the tip of the catheter change too rapidly to be controlled by the physician, and thus fast transient backflow conditions can occur throughout the infusion

Method used

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  • Microvalve protection device and method of use for protection against embolization agent reflux
  • Microvalve protection device and method of use for protection against embolization agent reflux
  • Microvalve protection device and method of use for protection against embolization agent reflux

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Embodiment Construction

[0055] exist Figure 2A to Figure 2C A first exemplary embodiment of the present invention is seen in . It should be noted that Figure 2A to Figure 2C Not shown in relative size, but for illustrative purposes. exist Figure 2A to Figure 2C In the drawing, a delivery catheter 201 having a proximal end (not shown) and a distal end 205 is shown positioned within an artery 204 . Delivery catheter 201 is adapted to deliver an embolic agent from outside the body of a patient (not shown) to a target vessel (artery or vein) inside the patient. Attached to the distal end 205 of the catheter 201 is an exemplary embodiment of a valve 203 having a plurality of filaments 203a, 203b, 203c... which are preferably braided and movable relative to each other. As discussed below, the filaments are spring-biased (i.e., they have "shape memory") to adopt the desired angle of intersection relative to each other, so that the valve can assume a substantially frusto-conical shape (it should be noted...

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Abstract

An apparatus is provided that is useful in an embolization procedure and enables substantially unrestricted forward flow of blood in a vessel and reduces or stops reflux (regurgitation or backward flow) of embolization agents which are introduced into the blood. A method of using the apparatus is also provided.

Description

technical field [0001] The present invention generally relates to medical embolization systems. More particularly, the present invention relates to embolic therapy systems utilizing a protective device that reduces backflow of a therapeutic agent in a blood vessel during an embolic therapy procedure wherein the embolic agent is delivered through a catheter to pass through a delivery orifice of the catheter To provide treatment to the tissue extremities. Background technique [0002] Embolization, chemoembolization, and radioembolization are often used clinically to treat a range of diseases, such as multivascular liver tumors, uterine fibroids, liver secondary cancer metastasis, preoperative treatment of multivascular meningiomas, and bronchial hemoptysis. Arterial embolism. Embolic agents can be implemented in different forms, such as beads, liquids, foams or glues that are placed within the vasculature of an artery. Beads can be uncoated or coated. Where the beads are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/06
CPCA61M25/005A61M2025/0004A61M2025/0042A61M2025/0681A61F2002/018A61F2230/0006A61F2230/0067A61F2230/0076A61F2230/008A61F2/014A61M25/0075A61M2025/0076
Inventor J.E.乔马斯L.平楚克J.马丁A.阿雷帕利B.E.纳格尔雷特N.R.韦尔登B.M.平楚克
Owner TRISALUS LIFE SCI INC
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