Five-bevel cannula for blood acquisition devices

A syringe assembly comprising:

• a syringe barrel;
• and
• a needle attached to the syringe barrel, the needle having a cannula having a lumen and defining a central axis therethrough and further defining a reference plane passing through the central axis and bisecting the cannula, the needle having a multi-beveled point provided at one end of the cannula,
• wherein the multi-beveled point comprises:
• a primary bevel;
• two middle bevels;
• and
• two tip bevels,
• wherein each of the middle bevels extends between the primary bevel and one of the tip bevels,
• wherein the primary bevel is provided on the cannula at a first angle of inclination and a first angle of rotation, the two middle bevels are provided on the cannula at a second angle of inclination and a second angle of rotation, and the two tip bevels are provided on the cannula at a third angle of inclination and a third angle of rotation,
• wherein the first angle of inclination, the second angle of inclination, and the third angle of inclination are inclined relative to the central axis,
• wherein the first angle of rotation, the second angle of rotation, and the third angle of rotation are each defined relative to the reference plane perpendicular to the central axis,
• wherein the first angle of inclination is between 8° and 12°,
• wherein the second angle of inclination is between 15° and 20°,
• wherein the third angle of inclination is greater than the second angle of inclination,
• wherein the second angle of rotation is equal to the third angle of rotation such that the two middle bevels and the two tip bevels comprise outwardly directed surfaces having the same angle of rotation, wherein the second angle of rotation and the third angle of rotation are each between 30° and 50°, and
• wherein intersects of the primary bevel and each of the middle bevels are located on one side of the reference plane, and the tip bevels are located on an opposite side of the reference plane.

A blood collection device comprising:

• a hub;
• and
• a needle extending from the hub, the needle having a cannula having a lumen and defining a central axis therethrough and further defining a reference plane passing through the central axis and bisecting the cannula, the needle having a multi-beveled point provided at one end of the cannula,
• wherein the multi-beveled point comprises:
• a primary bevel;
• two middle bevels;
• and
• two tip bevels,
• wherein each of the middle bevels extends between the primary bevel and one of the tip bevels,
• wherein the primary bevel is provided on the cannula at a first angle of inclination and a first angle of rotation, the two middle bevels are provided on the cannula at a second angle of inclination and a second angle of rotation, and the two tip bevels are provided on the cannula at a third angle of inclination and a third angle of rotation,
• wherein the first angle of inclination, the second angle of inclination, and the third angle of inclination are inclined relative to the central axis,
• wherein the first angle of rotation, the second angle of rotation, and the third angle of rotation are each defined relative to the reference plane perpendicular to the central axis,
• wherein the first angle of inclination is between 8° and 12°,
• wherein the second angle of inclination is between 15° and 20°,
• wherein the third angle of inclination is greater than the second angle of inclination,
• wherein the second angle of rotation is equal to the third angle of rotation such that the two middle bevels and the two tip bevels comprise outwardly directed surfaces having the same angle of rotation, wherein the second angle of rotation and the third angle of rotation are each between 30° and 50°, and
• wherein intersects of the primary bevel and each of the middle bevels are located on one side of the reference plane, and the tip bevels are located on an opposite side of the reference plane.