Systems and methods for treating pulmonary edema
Systems, methods, and devices are provided for the treatment of edema. In one aspect a method for implanting an indwelling catheter within a vein of a patient is provided. The catheter can extend from a position upstream of at least one outflow port of a duct of the lymph system to a terminal position downstream of the at least one outflow port. In use, a first restriction can be created within the vein proximal to a distal region of the catheter. The first restriction can define a localized low pressure zone distal of the restriction and within a portion of the vein housing the catheter. The low pressure zone can be adjacent to the at least one outflow port to enable fluid to pass from the at least one lymph duct outflow port into the vein.
1. A method for treating heart failure in a patient, the method comprising:
providing a system comprising: a catheter apparatus comprising one or more restrictors and one or more sensors; and a control module operable coupled to the catheter apparatus, wherein the control module receives feedback from the one or more sensors and controls the one or more restrictors based on the feedback from the one or more sensors;
advancing the catheter apparatus into a superior vena cava of a patient; and
operating the catheter apparatus to regulate venous blood return through the superior vena cava, wherein operating at least comprises activating the one or more restrictors within the superior vena cava to at least partially occlude flow through the superior vena cava and adjusting the one or more restrictors based on feedback from the one or more sensors, thereby treating heart failure in the patient.
2. The method of claim 1 , wherein the one or more restrictors fully restrict flow through the superior vena cava.
3. The method of claim 1 , wherein the catheter apparatus is advanced through a subclavian or jugular vein.
4. The method of claim 1 , wherein the one or more sensors are one or more pressure sensors.
5. The method of claim 1 , wherein the method is performed while maintaining intravascular pressure.
6. The method of claim 1 , wherein the one or more restrictors are one or more balloons.
7. The method of claim 6 , wherein the one or more balloons are one or more compliant or semi-compliant balloons.
8. The method of claim 6 , wherein the one or more balloons are operably coupled to one or more inflation sources.
9. The method of claim 1 , wherein the adjustment of the one or more restrictors comprises creating a pressure gradient across at least one of the one or more restrictors.
10. The method of claim 1 , wherein at least one of the one or more sensors is distal to at least one of the one or more restrictors.
11. The method of claim 1 , wherein at least one of the one or more sensors is spaced apart from at least one of the one or more restrictors.
12. The method of claim 1 , wherein activating the one or more restrictors creates a pressure drop in a vein.
13. The method of claim 12 , wherein the method further comprises detecting a pressure drop in the vein via the one or more sensors.
14. The method of claim 1 , wherein the one or more restrictors comprise a distal restrictor and the method further comprises measuring a pressure distal of and proximal of the distal restrictor.
15. The method of claim 1 , wherein the catheter comprises an opening that is configured to facilitate pressure monitoring.
16. The method of claim 1 , wherein the catheter extends across a vein wall proximal of the superior vena cava.