Patent ID: 8469919

Claim:
A nozzle apparatus for distributing coolant within a cryo-ablation device, comprising: a tubular member having substantially straight, parallel walls defined by an inner surface and an outer surface, the inner surface defining a lumen through which coolant may flow, the tubular member defining a plurality of angled apertures extending between the inner and outer surfaces of the walls such that coolant flowing through the lumen is dispersed from the tubular member through the plurality of apertures and into a space defined by the cryo-ablation device, wherein the tubular member includes an outer tubular member and an inner tubular member, the inner tubular member disposed within and spaced apart from the outer tubular member, the inner tubular member defining a lumen in fluid communication with a lumen of the outer tubular member, the outer tubular member defining the plurality of angled apertures, the outer tubular member further defining a second plurality of apertures, wherein the outer and inner tubular members are configured such that coolant flows through the lumen of the inner tubular member, into the lumen of the outer tubular member, and out through the plurality of angled apertures, wherein spent coolant may be returned through the second plurality of apertures into a space between the outer and inner tubular members.