Patent ID: 11904152
Assignee: KG SURGICAL INSTRUMENTS LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A tubular needle of a surgical cannula for injection of fluid into a subcutaneous tissue around a vein, the tubular needle comprising:
a proximal end, the proximal end being open and capable of being in fluid communication with a source of fluid;
a distal end, the distal end comprising a closed blunt tip;
a tubular side wall defining a hollow central lumen, the hollow central lumen extending from the proximal end to the closed blunt tip at the distal end, the hollow central lumen being capable of being in fluid communication with the source of fluid, the tubular side wall further comprising:
a first proximal end section, the first proximal end section comprising:
a first straight section extending from the proximal end, the first straight section having a length in a range of 0.5 cm to 5.5 cm, the first straight section having a first central axis; and

a second main body section extending from the first proximal end section, the second main body section comprising:
a second straight section, the second straight section having a length in a range of 10.0 cm to 60.0 cm, the second straight section further having a second central axis, the second central axis being angled away from the first central axis at a first angle in a first plane, such that the first central axis and the second central axis are coplanar in the first plane, the first angle being in a range of 35° to 45°;

a third distal end section extending from the second main body section to the closed blunt tip, the third distal end section comprising:
a third straight section, the third straight section having a length in a range of 1.0 cm to 3.0 cm, the third straight section further having a third central axis, the third central axis being angled away from the second central axis at a fourth composite angle, the fourth composite angle being a combination of a second angle and a third angle, such that the third central axis is effectively angled away from the second central axis both at the second angle in the first plane and at the third angle in a second plane, the second plane being perpendicular to the first plane such that the second central axis is located on a line of intersection of the first plane and the second plane, the second angle being in a range of 15° to 35° and the third angle being in a range of 15° to 25°, such that the fourth composite angle is in a range of 20.8° to 40.0°, such that the third central axis is not coplanar with the first central axis; and
a plurality of apertures through the tubular side wall consisting of said plurality of apertures through only the third straight section and configured through the tubular side wall to face the second central axis, wherein said plurality of apertures are configured to inject said fluid from said plurality of apertures toward said second central axis and into the subcutaneous tissue around the vein; and
wherein the length of the second straight section is more than twice the length of the first straight section and more than twice the length of the third straight section.