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Olathe, KS, United States

Patent
Flow Forward Medical | Date: 2015-10-12

A system and method for increasing the speed of blood and wall shear stress (WSS) in a peripheral vein for a sufficient period of time to result in a persistent increase in the overall diameter and lumen diameter of the vein is provided. The method includes pumping blood at a desired rate and pulsatility. The pumping is monitored and adjusted, as necessary, to maintain the desired blood speed, WSS and pulsatility in the peripheral vein in order to optimize the rate and extent of dilation of the peripheral vein.


Patent
Flow Forward Medical | Date: 2015-10-12

A system and method for increasing the speed of blood and wall shear stress (WSS) in a peripheral vein for a sufficient period of time to result in a persistent increase in the overall diameter and lumen diameter of the vein is provided. The method includes pumping blood at a desired rate and pulsatility. The pumping is monitored and adjusted, as necessary, to maintain the desired blood speed, WSS and pulsatility in the peripheral vein in order to optimize the rate and extent of dilation of the peripheral vein.


Grant
Agency: Department of Health and Human Services | Branch: National Institutes of Health | Program: SBIR | Phase: Phase I | Award Amount: 225.00K | Year: 2015

DESCRIPTION provided by applicant This study aims to evaluate the in vivo effectiveness of the Arteriovenous Fistula Eligibility AFE System tm a small temporary wearable rotary blood pump system designed to rapidly and permanently dilate peripheral veins Successful commercialization of the AFE System would enable the creation of arteriovenous fistula AVF vascular access sites in hemodialysis patients who are currently ineligible because of inadequate vein diameter as well as to reduce AVF maturation failure in patients who are eligible but at high risk for failure Flow Forward Medical has developed a working prototype of the AFE System including the blood pump component demonstrating excellent hydrodynamic performance and minimal blood damage Recent pilot in vivo studies in a pig model have shown rapid and substantial vein dilation with only minimal vein wall scarring and without acute effects on cardiovascular function Using this model the AFE System outflow vein showed X faster dilation and less neointimal hyperplasia during vein maturation when compared to the outflow veins of conventional AVFs The objective of this proposed Phase I program is to compare AVFs made using AFE System treated veins and untreated veins in a porcine model Analysis will involve hemodynamics angiography and histology Based upon the success of Phase I Phase II of the program will include studying the AFE System in a uremic pig model development of wearable electronics GLP animal studies to evaluate the final device design and preparations for a first in man clinical trial PUBLIC HEALTH RELEVANCE There are about patients with end stage renal disease in the U S who depend on hemodialysis for their survival Creating effective and reliable vascular access sites that can connect patients to hemodialysis machines remains a major unmet clinical need Hemodialysis patients who use an arteriovenous fistula AVF for vascular access live longer healthier lives and cost less to care for However only about of hemodialysis patients in the U S use an AVF mostly because of inadequate vein diameter and high rates of failure after AVF surgery due to vein narrowing Prior studies have shown much higher success rates from AVF surgery for patients with larger initial vein diameters Flow Forward Medicalandapos s AFE System tm is designed to rapidly and permanently dilate peripheral veins enabling nearly all hemodialysis patients to be eligible for an AVF and reducing their subsequent risk of AVF failure


Loree H.M.,Flow Forward Medical | Agyapong G.,Flow Forward Medical | Favreau E.G.,Flow Forward Medical | Ngai G.A.,Flow Forward Medical | And 3 more authors.
ASAIO Journal | Year: 2015

The arteriovenous fistula eligibility (AFE) system (Flow Forward Medical, Olathe, KS) is a small, temporary, wearable rotary blood pump system designed to rapidly dilate peripheral veins in hemodialysis patients and improve outcomes after arteriovenous fistula (AVF) creation. A benchtop pulsatile mock circulatory loop was developed to model forearm circulation and to compare the hemodynamics of the AFE system with those of a conventional radiocephalic AVF. The AFE system maintained a mean wall shear stress (mWSS) within the 2.5-7.5 Pa target range for cephalic outflow veins of 2-6 mm diameter, which when applied clinically will provide better control of mWSS during the outflow vein maturation process when compared with a conventional AVF. These results support further study to determine whether or not vein preconditioning with the AFE system under controlled levels of mWSS will promote improved AVF outcomes. © American Society of Artificial Internal Organs. Source

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