Hollow curved superelastic medical needle and method

A needle assembly, comprising:

• an outer needle cannula having a distal opening;
• a multi-needle subassembly received within said outer needle cannula, said subassembly comprising a base cannula and a plurality of needle cannulae having proximal portions manifolded into and affixed in place within said base cannula to fix distal tip portions of said needle cannulae in a needle array extending distally of a distal end of said base cannula, said multi-needle subassembly slidable within said outer needle cannula to selectively deploy said needle array from said distal opening of said outer needle cannula;
• said needle cannulae each having a passageway, and each said needle cannula, while in its unconstrained configuration, having at least one preformed bend proximate to said distal tip portion and being constrainable to a second configuration, whereby at release of external constraining forces, said distal tip portion of each said needle cannula substantially returns to the unconstrained configuration extending forwardly and radially outwardly from a respective said preformed bend;
• a proximal base cannula hub fixed to said base cannula and configured to infuse material or aspirate material through the needle cannulae and the base cannula;
• an outer needle cannula hub fixed to said outer needle cannula;
• a handle including a stationary outer component attached to the proximal base cannula hub and a slidable inner component attached to the outer needle cannula hub, wherein the slidable inner component is slidable into the stationary outer component to deploy said needle array from said distal opening of said outer needle cannula, and slidable out of said stationary outer component to retract said needle array into said distal opening of said outer needle cannula.