Perfusion catheters and related methods

A perfusion catheter, comprising:

• an inflatable balloon coiled in a helical manner around a central axis into a series of windings that are stacked against and bonded to each other, an inner surface of the series of windings, when inflated, defining a passage through the inflatable balloon;
• and
• an elongate shaft extending from a proximal end to a distal end and having an inner surface that defines a lumen for providing inflation fluid to, and withdrawing inflation fluid from, the inflatable balloon;
• wherein the lumen of the elongate shaft includes an inflation port that is in fluid communication with an interior of the inflatable balloon in such a way that inflation fluid is exclusively added and removed from the distal end of the inflatable balloon.

A perfusion catheter, comprising:

• an inflatable balloon coiled in a helical manner around a central axis into a series of spaced apart windings that do not contact each other, an inner surface of the series of windings, when inflated, defining a passage through the inflatable balloon;
• and
• an elongate shaft extending from a proximal end to a distal end and having an inner surface that defines a lumen for providing inflation fluid to, and withdrawing inflation fluid from, the inflatable balloon;
• wherein the lumen of the elongate shaft includes an inflation port that is in fluid communication with an interior of the inflatable balloon in such a way that inflation fluid is exclusively added and removed from the distal end of the inflatable balloon.