Medical systems and devices for the aerosolization of a fluid endoscopically

An insertion portion of a medical device, comprising:

• a sheath defining a first lumen and a second lumen;
• and
• a cap configured to be coupled to a distal end of the sheath, wherein the cap includes a distal wall having a distal opening extending therethrough, wherein a cavity is defined between the distal wall and a distal end of each of the first lumen and the second lumen,
• wherein, upon delivery of a fluid from the first lumen into the cavity and upon delivery of a gas from the second lumen into the cavity, an aerosol is delivered via the distal opening of the cap.

A medical device, comprising:

• a sheath defining a first lumen and a second lumen,
• a connector fixed to a proximal end of the sheath and fluidly connected to the first lumen and the second lumen;
• and
• a cap fixed to a distal end of the sheath, the cap defining a cavity and a distal opening, wherein when the cap is coupled to a distal end of the sheath, the distal opening is at least partially aligned with a distal end of the second lumen,
• wherein, upon:
• (1) delivery of a fluid through the first lumen and into the cavity and (2) delivery of a gas through the second lumen and into the cavity, an aerosol is delivered through the distal opening of the cap.