BIDIRECTIONAL ARTERIAL CANNULA FOR EXTRACORPOREAL MEMBRANE OXYGENATION, INTRODUCER STYLET AND REMOVAL STYLET Russian patent published in 2024 - IPC A61M1/36 A61M25/00 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to an arterial cannula for extracorporeal membrane oxygenation (EXMO), as well as to an introducer stylet for cannula introduction and an extraction stylet for its removal. Arterial cannula for EXMO comprises a primary arterial cannula and a retroperfusion cannula. Main arterial cannula comprises an inner wall and has a first end with a blood outlet, said first end being inserted into an artery for retrograde introduction of blood into the artery. Retroperfusion cannula is translationally movable between a retracted position at a first end of the primary arterial cannula and a position at least partially extended from the first end of the primary arterial cannula, opposite the blood outlet of the primary arterial cannula. Retroperfusion cannula comprises a tube with a diameter smaller than the diameter of the main arterial cannula, and a ring with a diameter substantially identical to the diameter of the main arterial cannula, located at the proximal end of the retroperfusion cannula relative to the blood outlet of the main arterial cannula. Stiletto introducer is configured to be inserted into the above arterial cannula to enable both the introduction of the primary arterial cannula into the artery and the extension of the retroperfusion cannula from the primary arterial cannula, wherein the stiletto introducer is configured to overlap the primary arterial cannula. Removal stylet is configured to be inserted into the arterial cannula described above to enable the retroperfusion cannula to be retracted into the primary arterial cannula and to be able to withdraw the primary arterial cannula from the artery, wherein the removal stylet is configured to overlap the primary arterial cannula.

EFFECT: arterial cannula according to the invention enables to introduce blood into the artery in a retrograde manner, in the direction of the heart, and in an anterograde manner, in the direction of the lower extremity, to avoid the risk of ischemia and thrombosis caused by EXMO, while avoiding the delicate operation of introducing a retroperfusion cannula into the femoral artery.

14 cl, 18 dwg