Implantable arterio-venous shunt devices and methods for their use
A long-term implantable arterio-venous shunt device or creation of a fistula is provided that can be used as a therapeutic method for treating chronic obstructive pulmonary disease (COPD). The shunt device is implanted between an artery and a vein, preferably between a peripheral artery and the inferior vena cava. The shunt device and method of creating a fistula increases cardiac output and decreases the systemic vascular resistance and allows a blood flow rate through the shunt device of at least 5 ml/min after the implantation. Based on the effects of the method and device to the respiratory, cardiac and circulatory system, the method and device are beneficial as a therapy to patients with problems or conditions related to these systems.
1. A therapeutic method for increasing cardiac output in a human subject, the method comprising:
selecting a patient suffering from a disease selected from the group consisting of: congestive heart failure, coronary artery disease, lung fibrosis, emphysema, cystic fibrosis, and cystic lung disease, and
creating a fistula between a peripheral artery and a peripheral vein of said subject, said fistula adapted to allow a blood flow rate therethrough of at least 5 ml/min, wherein said blood flow through the fistula bypasses the peripheral microcirculation, and wherein creation of said fistula results in an increase in the cardiac output, a decrease in mean arterial blood pressure, and decreased systemic vascular resistance in said subject.
2. The method as set forth in claim 1 , wherein the fistula forms a lumen between the artery and the vein, the lumen having a length between 2.5 mm and 15 mm.
3. The method of claim 2 , wherein the artery and the vein are both of the same type and are selected from the group consisting of: an iliac artery and an iliac vein, and a femoral artery and a femoral vein.
4. The method of claim 2 , wherein the artery is either the iliac artery or the femoral artery, and the vein is either the iliac vein or the femoral vein.
5. The method of claim 2 , wherein the artery and the vein are both of the same type and are selected from the group consisting of: an auxiliary artery and an auxiliary vein, and a subclavian artery and a subclavian vein.
6. The method as set forth in claim 2 , wherein the method lowers mean arterial blood pressure of the subject by at least 5%.
7. The method as set forth in claim 2 , wherein the fistula is created via an open surgical procedure, a minimally invasive surgical procedure, or an intravascular procedure.