Patent ID: 8795576

Claim:
A method of applying a radiopaque marker to a cannula for use with an intracardiac pump, the method comprising: obtaining a band of radiopaque polymer material; placing the band around an outer diameter of the cannula, the cannula comprising a flexible tubular wall formed around and supported by a coil of shape memory material; placing a heat shrink tube around the band and the cannula; heating the band and the polymer tube to: soften the band; cause the heat shrink tube to shrink and apply force on the softened band towards the cannula; and cause the softened band to be welded to the cannula to form a radiopaque marker in a portion of the tubular wall; and removing the heat shrink tube; wherein the radiopaque band comprises a mixture of a radiopaque material with a non-radiopaque polymer, and wherein the mixture includes at least 80% of the radiopaque material by weight.