Suction Endoscopic Sheath and Assembly with Transposed Pressure Regulating Mechanism

A suction endoscopic sheath assembly for removing stone and stone fragments from a patient comprising:

• a straight sheath (10) comprising:
• a proximal tube (20) with a lumen (26), a proximal end (22) and a distal end (24);
• a first distal tube (30) with a lumen (36), a proximal end (32) and a distal end (34);
• wherein the distal end (24) of the proximal tube (20) is secured to the proximal end (32) of the first distal tube (30);
• and wherein the first distal tube (30) may have graduation markings to measure distance on its surface (31);
• wherein the distal tube (30) may have uniform or variable flexibility;
• one or more side branches (40) with a proximal end (42) extending away from the distal end (24) of the proximal tube (20);
• wherein each of the one or more side branches (40) has a lumen (46) extending from the proximal end (42) to a distal end (44) and joining with the lumen (26) of the proximal tube (20) at the distal end (24) of the proximal tube (20);
• wherein at least one of the at least one side branches (40) contains a pressure vent (60) in the form of an opening extending through a wall (41) of the one or more side branches (40) and being enclosed by an airtight pressure vent channel (70);
• wherein the pressure vent channel (70) extends toward the proximal tube (20) of the straight sheath (10) and has at least one opening (75) located and accessible on or near the surface (21) of said proximal tube (20) such that an operator can regulate the aspiration pressure by partially or completely covering and uncovering the opening (75);
• an obturator (80) with one or more central channels (86, 86′) inserted into the proximal end (22) of the proximal tube (20);
• said one or more central channels extending beyond the distal end (34) of the distal tube (30), wherein the proximal end (82) of the obturator is releasably secured to the proximal end (22) of the proximal tube (20);
• a flexible water-tight seal (90) with central aperture (95) that is releasably or non-releasably secured to the proximal end (22) of the proximal tube (20);
• a primary end (210) of a primary tube (200) releasably secured to a distal end (44) of the side branch (40) which contains the transposed pressure regulating mechanism (75);
• and
• a distal end (220) of the primary tube (200) releasably secured to a collection container (400);
• and the proximal end (310) of a secondary tube (300) is releasably secured to the collection container (400) and the distal end (320) of the secondary tube (300) is releasably secured to a negative pressure apparatus (500).