Suction device

Abstract

A suction device includes an outer tube having an inlet at a first end and an inner suction tube located within the outer tube, the inner suction tube having an inlet at a first end corresponding to the first end of the outer tube. The inlet of the inner suction tube is offset by a distance from the inlet of the outer suction tube, such that the inlet of the inner suction tube is located within the outer suction tube.

1 . A suction device, comprising:
 an outer tube having an open outer inlet at a first outer end; the outer tubing having a constant inner diameter from a proximal end of the outer tube to the first outer end, and the constant inner diameter is equal to the outer inlet diameter;   an inner suction tube to be located within the outer tube, the inner suction tube having an open inner inlet having an inner inlet diameter at a first inner end corresponding to the first outer end of the outer tube, an inner outlet at a proximal end of the inner suction tube, and the first inner end and the first outer end are open, wherein the inner inlet of the inner suction tube is recessed within the outer tube;   wherein the outer inlet diameter is greater than the inner inlet diameter;   and wherein when a suction pressure is applied to the inner outlet at the proximal end of the inner suction tube and the first outer end of the outer tube contacts a fluid or a solid, a vacuum is located in a space between a proximal portion of an outer surface of wall of the inner suction tube and a proximal portion of an inner surface of a wall of the outer tube.