Anti-reflux vial adaptors
First Claim
Patent Images
1. A vial adaptor comprising:
- a medical connector interface configured to connect the vial adaptor to a syringe, wherein the syringe has a barrel and a plunger disposed within the barrel;
a piercing member;
an extractor channel at least partially defined by the piercing member;
an extractor aperture in fluid communication with the medical connector interface; and
a valve positioned within the extractor channel, the valve configured to resist unintended movement of the plunger when the syringe is connected to the medical connector interface;
wherein the vial adaptor is configured to be coupled with a vial containing a medicinal fluid, such that at least a portion of the extractor channel is in fluid communication with the medicinal fluid contained in the vial when the vial adaptor is coupled to the vial;
wherein the extractor channel is configured to facilitate transfer of the medicinal fluid between the vial adaptor and the vial when the vial adaptor is coupled to the vial;
wherein the valve permits the medicinal fluid to flow into the vial and away from the vial when the vial adaptor is coupled to the vial;
wherein the valve has a first cracking pressure for allowing fluid flow away from the vial and a second cracking pressure for allowing fluid flow towards the vial; and
wherein the second cracking pressure is greater than the first cracking pressure, such that the cracking pressure of the valve is greater in the direction of fluid flow towards the vial than in the direction of fluid flow away from the vial.
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Accused Products
Abstract
In certain embodiments, a vial adaptor comprises a housing member, a connector configured to couple the adaptor with a vial, and an extractor channel formed in the housing member. The extractor channel is configured to facilitate withdrawal of fluid from the vial when the adaptor is coupled to the vial. In some embodiments, an anti-reflux valve is positioned within the extractor channel. The anti-reflux valve can be configured to impede or obstruct fluid returning to a fluid source after withdrawal of the fluid from the fluid source.
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Citations
26 Claims
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1. A vial adaptor comprising:
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a medical connector interface configured to connect the vial adaptor to a syringe, wherein the syringe has a barrel and a plunger disposed within the barrel; a piercing member; an extractor channel at least partially defined by the piercing member; an extractor aperture in fluid communication with the medical connector interface; and a valve positioned within the extractor channel, the valve configured to resist unintended movement of the plunger when the syringe is connected to the medical connector interface; wherein the vial adaptor is configured to be coupled with a vial containing a medicinal fluid, such that at least a portion of the extractor channel is in fluid communication with the medicinal fluid contained in the vial when the vial adaptor is coupled to the vial; wherein the extractor channel is configured to facilitate transfer of the medicinal fluid between the vial adaptor and the vial when the vial adaptor is coupled to the vial; wherein the valve permits the medicinal fluid to flow into the vial and away from the vial when the vial adaptor is coupled to the vial; wherein the valve has a first cracking pressure for allowing fluid flow away from the vial and a second cracking pressure for allowing fluid flow towards the vial; and wherein the second cracking pressure is greater than the first cracking pressure, such that the cracking pressure of the valve is greater in the direction of fluid flow towards the vial than in the direction of fluid flow away from the vial. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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15. A method of regulating fluid flow through a vial adaptor, the method comprising:
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connecting a vial adaptor to a vial containing a medicinal fluid, wherein the vial adaptor comprises; a medical connector interface configured to connect the vial adaptor to a syringe, wherein the syringe has a barrel and a plunger disposed within the barrel; a piercing member; an extractor channel at least partially defined by the piercing member; an extractor aperture in fluid communication with the medical connector interface; and a valve positioned within the extractor channel, the valve configured to resist unintended plunger movement; wherein the vial adaptor is configured to place at least a portion of the extractor channel in fluid communication with the medicinal fluid contained in the vial; wherein the extractor channel is configured to facilitate transfer of the medicinal fluid between the vial adaptor and the vial; wherein the valve permits the medicinal fluid to flow from the syringe to the vial when the plunger is depressed; wherein the valve permits the medicinal fluid to flow away from the vial when the plunger is withdrawn; wherein the valve has a first cracking pressure for allowing fluid flow away from the vial and a second cracking pressure for allowing fluid flow towards the vial; and wherein the second cracking pressure is greater than the first cracking pressure, such that the cracking pressure of the valve is greater in the direction of fluid flow towards the vial than in the direction of fluid flow away from the vial; permitting the medicinal fluid to flow through the extractor channel from the vial to the syringe; and impeding medicinal fluid flow from the syringe to the vial by permitting the valve to resist unintended plunger movement. - View Dependent Claims (16)
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17. A method of manufacturing a vial adaptor, the method comprising:
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disposing a valve within an extractor channel of a vial adaptor, the vial adaptor comprising; a medical connector interface configured to connect the vial adaptor to a syringe, wherein the syringe has a barrel and a plunger disposed within the barrel; a piercing member; the extractor channel at least partially defined by the piercing member; and an extractor aperture in fluid communication with the medical connector interface; wherein the vial adaptor is configured to be coupled with a vial containing a medicinal fluid, such that at least a portion of the extractor channel is in fluid communication with the medicinal fluid contained in the vial when the vial adaptor is coupled to the vial; wherein the extractor channel is configured to facilitate transfer of the medicinal fluid between the vial adaptor and the vial when the vial adaptor is coupled to the vial; wherein the valve is configured to resist unintended plunger movement; and wherein the valve permits the medicinal fluid to flow from the syringe to the vial when the plunger is depressed and when the vial adaptor is coupled to the vial; wherein the valve permits the medicinal fluid to flow away from the vial when the plunger is withdrawn; wherein the valve has a first cracking pressure for allowing fluid flow away from the vial and a second cracking pressure for allowing fluid flow towards the vial; and wherein the second cracking pressure is greater than the first cracking pressure, such that the cracking pressure of the valve is greater in the direction of fluid flow towards the vial than in the direction of fluid flow away from the vial.
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Specification