Hyperpolarized helium-3 microbubble gas entrapment methods

A - Human Necessities – 61 – K

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A61K 49/00 (2006.01) A61K 49/18 (2006.01)

Patent

CA 2348032

Methods for increasing the T1 of injectable microbubble formulations of hyperpolarized 3He include the step of introducing the hyperpolarized 3He to a quantity of microbubbles held in a chamber and increasing the pressure therein to facilitate the movement or loading of the 3He into the microbubbles. Subsequently, a limited quantity of carrier liquid or a carrier liquid solution alone, or pre-mixed with 3He, can be introduced to the microbubble/3He in the chamber to inhibit the tendency of the 3He to leach out of the bubble. Related pharmaceutical products and associated containers as well as an evacuation based method for rapid mixing and delivery of the bubbles and the 3He is also disclosed. An additional method for dissolving 129Xe gas by using bubbles as an accelerant is also described.

La présente invention concerne des techniques permettant d'accroître la T¿1? de formulations injectables à microbulles de ?3¿He hyperpolarisé, qui consistent à introduire le ?3¿He hyperpolarisé dans une certaine quantité de microbulles contenues dans une chambre et à accroître la pression dans cette chambre pour faciliter le mouvement ou le chargement de ?3¿He dans les microbulles. On peut ensuite introduire une quantité limitée de liquide vecteur seul ou d'une solution de liquide vecteur seule, ou bien pré-mélangés avec ?3¿He, dans la microbulle/?3¿He de la chambre pour inhiber la tendance de ?3¿He s'extraire de la bulle. L'invention concerne également des produits pharmaceutiques et des récipients connexes ainsi qu'un procédé d'évacuation pour le brassage et la fourniture rapides de bulles et de ?3¿He. Est également décrite une méthode qui utiliser des bulles comme accélérateur pour dissoudre un gaz ?129¿Xe.

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