An occlusion device (10;110;210) comprising: a tube (12;112;212) having a proximal end (14;114;214) extending to a distal end and a tubular wall defining a lumen (18;118) formed therethrough, the tube defining a first collar (20;120) at the proximal end and a second collar (22;222) disposed between the proximal and distal ends, a plurality of cuts (24;124) formed through the tubular wall defining a plurality of radially expandable struts (26;126; 226), the plurality of struts being biased to a radially expanded state, wherein the plurality of struts defines a bulbous portion (30;130) extending between the first and second collars and a first conical portion (32;132) extending from the second collar to the distal end of the tube; wherein the first conical portion is defined by a first set of cuts (24;124) formed through the tubular wall in a first pattern; wherein the bulbous portion includes a second conical portion and a third conical portion, wherein the second conical portion is defined by a second set of cuts formed through the tubular wall in a second pattern, and the third conical portion is defined by a third set of cuts formed through the tubular wall in a third pattern; wherein the second conical portion is adjacent to both the first conical portion and the third conical portion; wherein the second and third patterns are different such that the struts of the second and third conical portions of the bulbous portion form different patterns, said occlusion device being characterized in that the third pattern is preselected so that the space between adjacent struts (26; 126; 226) of the third conical portion is larger than that of the second conical portion. a tube (12;112;212) having a proximal end (14;114;214) extending to a distal end and a tubular wall defining a lumen (18;118) formed therethrough, the tube defining a first collar (20;120) at the proximal end and a second collar (22;222) disposed between the proximal and distal ends, a plurality of cuts (24;124) formed through the tubular wall defining a plurality of radially expandable struts (26;126; 226), the plurality of struts being biased to a radially expanded state, wherein the plurality of struts defines a bulbous portion (30;130) extending between the first and second collars and a first conical portion (32;132) extending from the second collar to the distal end of the tube; wherein the first conical portion is defined by a first set of cuts (24;124) formed through the tubular wall in a first pattern; wherein the bulbous portion includes a second conical portion and a third conical portion, wherein the second conical portion is defined by a second set of cuts formed through the tubular wall in a second pattern, and the third conical portion is defined by a third set of cuts formed through the tubular wall in a third pattern; wherein the second conical portion is adjacent to both the first conical portion and the third conical portion; wherein the second and third patterns are different such that the struts of the second and third conical portions of the bulbous portion form different patterns, said occlusion device being characterized in that the third pattern is preselected so that the space between adjacent struts (26; 126; 226) of the third conical portion is larger than that of the second conical portion.