Medical Diagnostics

A suture anchor comprising a footing with a base defining a first, a second, a third, and a fourth base suture passage, a first and a second primary suture passage aligned with a primary level and fluidly connected to the first and second base suture passage for a first suture, a suture channel aligned with a secondary level spaced further from the base than the primary level, and fluidly connected to the third and fourth base suture passages a second suture, and a suture course for the first suture along a tertiary level defined by a top that is spaced further from the base than the secondary level.

Described here are devices, systems, and methods for adhering tubular structures, such as blood vessels. Generally, the methods may comprise advancing a first catheter comprising a first adhesion element into a first blood vessel and a second catheter comprising a second adhesion element into a second blood vessel. The vessels may be adhered together by heating tissue using the first and second adhesion elements.