Delivery devices and related methods of use

A medical device comprising:

• an outer balloon and an inner balloon each having an internal cavity fluidly connected to a respective inflation lumen, the inner balloon is further disposed within the internal cavity of the outer balloon;
• and
• at least one delivery unit including:
• a needle having a tip, an aperture along its length and a needle lumen and the needle is configured to move between a first position and a second position;
• and
• a reservoir containing a material;
• wherein inflation of at least one of the outer balloon or the inner balloon causes the needle to deliver the at least some portion of the material into the tissue through the needle lumen.

A method for delivering a medicament to bladder tissue, the method comprising:

• introducing a catheter shaft including a medical device in a collapsed state, the medical device including:
• an outer balloon having a first internal cavity in fluid communication with a first inflation lumen;
• an inner balloon disposed within the first internal cavity, said inner balloon defining a second internal cavity in fluid communication with a second inflation lumen;
• at least one delivery unit including:
• at least one needle being capable of piercing a tissue;
• at least one reservoir containing a material;
• advancing the catheter shaft into a body space;
• inflating at least one of the outer or inner balloons such that the at least one needle moves from a first position, wherein the needle does not pierce tissue, to a second position, wherein the needle pierces tissue;
• and delivering at least some portion of the material to the tissue through the needle.