Devices, systems, and methods for delivery of multi-component spacers and hydro-dissection solutions

A fluid delivery system, comprising:

• a dual chamber applicator comprising two chambers separate from one another, each chamber comprising at least one output port on a distal end thereof;
• and
• an injection needle assembly comprising:
• a hub comprising:
• first and second input ports aligned with the at least one output port of each of the two chambers of the dual chamber applicator,
• an auxiliary port, and
• a connector shaped and sized to connect the hub to the dual chamber applicator;
• and
• an elongate hollow stylet extending distally from the hub, the elongate hollow stylet having a proximal portion at the hub and a distal portion spaced a distance from the proximal portion, the elongate hollow stylet comprising:
• an outer side wall extending from the proximal portion to the distal portion and defining an outer lumen that is fluidly coupled to the auxiliary port,
• a first inner side wall extending from the proximal portion to the distal portion and defining a middle lumen disposed within the outer lumen such that the outer lumen surrounds the middle lumen, the middle lumen being fluidly coupled to the first input port,
• a second inner side wall extending from the proximal portion to the distal portion and defining an inner lumen disposed within the middle lumen such that the middle lumen surrounds the inner lumen, the inner lumen being fluidly coupled to the second input port, and
• a mixing chamber disposed at the end distal portion of the elongate hollow stylet, the mixing chamber fluidly coupled to the outer lumen, the middle lumen, and the inner lumen,
• wherein the connector aligns the first and second input ports with each of the plurality of output ports of the dual chamber applicator.

A fluid delivery system, comprising:

• an injection needle assembly having a proximal end and a distal end spaced a length from the proximal end, the injection needle assembly comprising a hub disposed at the proximal end, the hub comprising:
• a first input port fluidly coupled to a first lumen extending the length of the injection needle assembly,
• a second input port fluidly coupled to a second lumen extending the length of the injection needle assembly, the second lumen separated from the first lumen, and
• an auxiliary port fluidly coupled to a third lumen extending the length of the injection needle assembly, the third lumen separated from the first lumen and the second lumen;
• a dual chamber applicator comprising:
• a first chamber having a first output port aligned with the first input port of the hub,
• a second chamber separate from the first chamber, the second chamber having a second output port aligned with the second input port of the hub;
• and
• an auxiliary applicator fluidly coupled to the auxiliary port of the hub,
• wherein the injection needle assembly is couplable to the dual chamber applicator via a connector in the hub, the connector shaped and sized to align the first and second input ports with the first and second output ports.