11 results about "Retrograde Flow" patented technology

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

A method of providing embolic protection for carotid stent implantation includes advancing an arterial sheath into an arterial system of a patient and advancing a venous sheath into a venous system of the patient. A fluid connection may be established between the venous sheath and the arterial sheath to enable retrograde flow of blood through the arterial sheath. The artery sheath may be advanced through the vasculature into the patient's carotid artery and the inflatable balloon may be inflated within the patient's carotid artery to block smooth blood flow therein. An interventional tool may be advanced through the interior lumen of the arterial sheath, the interventional tool sized such that a portion of the cross-sectional area of the interior lumen of the arterial sheath remains open for retrograde flow of blood.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

Methods and devices are configured for neurointerventional procedures. The methods and devices enable safe and rapid access to the cerebral or intracranial arteries for the introduction of interventional devices such as to treat stroke and / or other disease conditions. The methods and devices include a vascular access and retrograde flow system that can be used safely and rapidly in the neurointerventional procedures.

Disclosed herein are technologies for addressing elevated left-sided filling pressures to mitigate the effects of diastolic dysfunction. Embodiments provide ways to decrease the temporal increase in blood flow and pressure into the heart from the venous system. Under exertion, there is a shift of blood from the 'unstressed' reservoir of vasculature, which primarily comprises the splanchnic system, to the 'stressed' reservoir, which comprises the heart and lungs. By inhibiting this acute shifting of blood from the 'unstressed' reservoir to the 'stressed' reservoir, an undesirable influx of blood volume to the already overloaded left heart can be avoided. Certain embodiments provide ways to increase atrial elasticity, or atrial compliance. This enhancement of atrial compliance enables the atrium to 'absorb' the energy of short bursts of high left atrial pressure. Consequences are a reduction in the retrograde flow in the pulmonary veins to inhibit acute pulmonary congestion.

Embodiments herein provide a Pulmonary Circulation Assist Implant for passively regulating the cardiovascular blood flow in a subject born with a univentricular heart. The Pulmonary Circulation Assist Implant is configured to avoid a head-on collision between the bloodstreams from a Superior Vena Cava (SVC) and an Inferior Vena Cava (IVC) without an offset between them. Further, the Pulmonary Circulation Assist Implant is configured to smoothly distribute the SVC blood and IVC hepatic blood to both lungs in equal proportions without swirling. Also, the Pulmonary Circulation Assist Implant is configured to avoid the occurrence of retrograde flow and reduce power loss.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a variable occluder for implantation in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction. Following venous system compensation, oxygenated blood flow is shunted into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

Methods and devices are configured for neurointerventional procedures. The methods and devices enable safe and rapid access to the cerebral or intracranial arteries for the introduction of interventional devices such as to treat stroke and / or other disease conditions. The methods and devices include a vascular access and retrograde flow system that can be used safely and rapidly in the neurointerventional procedures.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

Disclosed herein are technologies for addressing elevated left-sided filling pressures to mitigate the effects of diastolic dysfunction. Embodiments provide ways to decrease the temporal increase in blood flow and pressure into the heart from the venous system. Under exertion, there is a shift of blood from the 'unstressed' reservoir of vasculature, which primarily comprises the splanchnic system, to the 'stressed' reservoir, which comprises the heart and lungs. By inhibiting this acute shifting of blood from the 'unstressed' reservoir to the 'stressed' reservoir, an undesirable influx of blood volume to the already overloaded left heart can be avoided. Certain embodiments provide ways to increase atrial elasticity, or atrial compliance. This enhancement of atrial compliance enables the atrium to 'absorb' the energy of short bursts of high left atrial pressure. Consequences are a reduction in the retrograde flow in the pulmonary veins to inhibit acute pulmonary congestion.