The invention relates to a method to prevent contrast-induced nephropathy during an imaging procedure. The method includes steps of positioning balloon catheters in a patient's renal arteries and renal veins and inflating the balloons of each catheter to block the flow of contrast media into the patient's kidneys.

Described herein are systems and methods from delivering prosthetic devices, such as prosthetic heart valves, through the body and into the heart for implantation therein. The prosthetic devices delivered with the delivery systems disclosed herein are, for example, radially expandable from a radially compressed state mounted on the delivery system to a radially expanded state for implantation using an inflatable balloon of the delivery system. Exemplary delivery routes through the body and into the heart include transfemoral routes, transapical routes, and transaortic routes, among others.

A multi-lumen catheter for monitoring intra-abdominal pressure, the catheter including an expandable outer balloon and an expandable inner balloon positioned within the outer balloon. A first lumen communicates with the inner balloon and the inner balloon and first lumen are filled with gas to form a gas filled chamber to monitor pressure within the bladder to thereby monitor pressure within an abdomen of the patient. A second lumen communicates with the bladder to remove fluid from the bladder. The catheter is configured for attachment of an external pressure transducer communicating with the gas filled chamber for measuring bladder pressure based on gas compression caused by deformation of the expanded inner balloon deformed by the expanded outer balloon.

Various aspects of the present disclosure are directed toward apparatuses, systems, and methods for applying ablation therapy to a tissue region. The apparatuses, systems, and methods may include a balloon structure and one or more electrodes arranged on or within the balloon structure and configured to deliver energy to the tissue region.

Systems and methods for continuous infusion of a fluid, which may be heated, into a balloon catheter. A system for balloon inflation, the system comprising a catheter having an inflow lumen and an outflow lumen, a balloon positioned at a distal end of the catheter, the balloon being in fluid communication with the inflow and the outflow lumen, and an infusion device in fluid communication with the balloon through the inflow and outflow lumens, the infusion device configured for continuously circulating a fluid into and out of the balloon to maintain the balloon at a constant pressure and volume by matching a flow of the fluid into the balloon via the inflow lumen with a flow of the fluid out of the balloon via the outflow lumen in order to keep the balloon volume and pressure constant during an entire infusion.

Devices and methods for delivering treatment fluids or particulates such as, stem cells, drugs, Botox and like, to an inner lining of a bladder for treatment of urinary tract disorders, including over-active bladder. A balloon delivery system can include an inflation balloon having a plurality of micro-needles configured to pierce and otherwise puncture an inner bladder wall so as to deliver the treatment fluid to bladder tissue. The treatment fluid can be directly injected into the bladder tissue using the micro needles. Alternatively, the micro needles can be fabricated of bioabsorbable or bioresorbable materials such that the micro needles can remain embedded within the bladder tissue to deliver the treatment fluid or particulate.

A percutaneous transluminal angioplasty (PTA) catheter may be configured to perform vein expansion and occlusion. A infusion port located proximal to the occlusion feature can be used to inject contrast enhancement agent as well as other substances. The catheter can be used especially advantageously in vascular regions associated with hemodialysis access.

Everting balloon systems and methods for using the same are disclosed herein. The systems can be configured to access and dilate body lumen and cavities. For example, the systems can be used to dilate the cervix and access the uterine cavity. The systems can also be used to occlude the cervix. The systems can also be used to occlude the urethra.

A catheter insertable into a patient for monitoring pressure having an expandable outer balloon. An expandable inner balloon is positioned within the lumen of the catheter and has having a second outer wall and forms a gas chamber to monitor pressure within the patient. In response to pressure exerted on the outer wall of the outer balloon, fluid within the outer balloon enters an opening in the wall of the catheter lumen to exert a pressure on the outer wall of the expanded inner balloon to deform the inner balloon and compress the gas within the inner balloon. A pressure sensor communicates with the gas containing chamber for measuring pressure based on compression of gas caused by deformation of the expanded inner balloon resulting from deformation of the expanded outer balloon.

A pressure inhibitor for an intravascular catheter system includes a check valve and/or a pressure relief valve. The intravascular catheter system includes a handle assembly, an inner balloon, an outer balloon and a low pressure fluid line. The inner balloon and the outer balloon define an inter-balloon space therebetween. The low pressure fluid line extends between the handle assembly and the inter-balloon spaced The low pressure fluid line is in fluid communication with the inter-balloon space. The pressure inhibitor is positioned on the low pressure fluid line. The pressure inhibitor inhibits flow of a fluid to the inter-balloon space. The pressure inhibitor can be positioned within the handle assembly or outside of the handle assembly. A method of inhibiting flow of a fluid to the inter-balloon space includes positioning a pressure inhibitor on the low pressure fluid of an intravascular catheter system.