Multiple cross section needle and elastic plug assembly for a medical device

A medical device comprising:

• a generally tubular member having opposed inner and outer surfaces and a selected internal cross-sectional dimension;
• an elastic plug having an outer surface and being disposed in the generally tubular member with the outer surface of the plug being in abutting face-to-face relationship with the inner surface of the generally tubular member wherein the elastic plug is compressible and, which in an uncompressed condition, defines an outer cross-sectional dimension greater than the internal cross-sectional dimension of the generally tubular member, and wherein the plug is radially compressed by the generally tubular member;
• and
• a needle with a proximal end and having a proximal portion with a first cross-section and a distal portion with a second cross-section larger than the first cross-section of the proximal portion and a juncture between the proximal portion and the distal portion and wherein the proximal portion resides in the plug and wherein the needle defines a lumen therein and a notch in fluid communication with the lumen and the notch is located at the juncture between the proximal portion and the distal portion.

A catheter, comprising:

• a cannula having a proximal end and a distal end;
• a hub connected to the proximal end of the cannula;
• and
• an introducer needle disposed in the cannula having a distal end, a distal portion with a first cross-section, a proximal portion with a second cross-section different than the first cross-section, a juncture between the distal portion and the proximal portion, and a proximal end, the needle including a lumen disposed in the needle and a notch in fluid communication with the lumen wherein the notch is located at the juncture between the proximal portion and the distal portion.

A catheter comprising:

• a cannula having a proximal end and a distal end;
• a hub connected to the proximal end of the cannula;
• and
• an introducer needle disposed in the cannula having a distal end, a distal portion with a first cross-section, a proximal portion with a second cross-section different than the first cross-section, wherein the first cross-section is larger than the second cross-section, a juncture between the distal portion and the proximal portion, and a proximal end, the needle including a lumen disposed in the needle and a notch in fluid communication with the lumen wherein the notch is located at the juncture between the proximal portion and the distal portion.

A catheter comprising:

• a cannula having a proximal end and a distal end;
• a hub connected to the proximal end of the cannula;
• an elastic plug disposed in the hub;
• and
• an introducer needle disposed in the cannula having a distal end, a distal portion with a first cross-section, an intermediate portion with a second cross-section, wherein the second cross-section is different than the first cross-section, a juncture between the distal portion and the intermediate portion, a proximal portion with a third cross-section and a proximal end wherein the proximal portion resides in the elastic plug and wherein the needle includes a lumen and a notch and the notch is located at a juncture between the distal portion and the intermediate portion.