Devices, assemblies, and methods for delivering agents

A valve assembly for a medical device, comprising:

• an enclosure defining a first chamber configured to store an agent and a second chamber configured to receive a pressurized fluid;
• and
• a valve disposed within the enclosure and positioned between the first chamber and the second chamber, wherein the valve is configured to fluidly couple the first chamber to the second chamber via an opening formed by the valve;
• wherein the valve is configured to move relative to the enclosure to a first position to close the opening between the first chamber and the second chamber, thereby inhibiting the agent from exiting the first chamber and entering the second chamber such that the pressurized fluid is not in fluid communication with the agent;
• and
• wherein the valve is configured to move relative to the enclosure to a second position to open the opening between the first chamber and the second chamber, thereby allowing the agent to exit the first chamber and enter the second chamber such that the pressurized fluid is in fluid communication with the agent.

A method for delivering an agent from a medical device, the medical device including an enclosure having a first chamber storing the agent and a second chamber that is in fluid communication with a pressurized fluid;

• the method comprising:
• actuating the medical device to deliver the pressurized fluid to the second chamber of the enclosure;
• moving a valve of the medical device from a first position to a second position in response to the pressurized fluid being delivered to the second chamber, wherein, in the first position, the valve is configured to seal the first chamber from the second chamber such that the agent is inhibited from exiting the first chamber, and in the second position, the valve is configured to unseal the first chamber from the second chamber such that the agent is permitted to exit the first chamber and enter the second chamber;
• agitating the agent with the pressurized fluid within the second chamber, thereby forming a mixture of the agent and the pressurized fluid;
• and
• guiding the mixture of the agent and the pressurized fluid through an outlet of the medical device.