Patent ID: 11911068
Assignee: SMART BIOMEDICAL CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A positioning device for insertion into a patient, comprising:
a. an outer sheath having a wall and a longitudinal axis and comprising a body and an external thread having a root and a crest and running around the longitudinal axis on an outer surface of the body in a first direction;
b. a removable inner cannula for insertion into the outer sheath, the cannula comprising a body for insertion in the body of the outer sheath, and a penetrating end on the body of the cannula at an insertion end;
c. a locking device for locking the inner cannula to the outer sheath, the locking device comprising
(i) a protrusion extending from the body of the inner cannula and
(ii) a corresponding locking channel on the outer surface of the body of the outer sheath, the locking channel comprising a first section, the first section running parallel to the longitudinal axis, and a second section having a first end and a second end, the second section intersecting the first section at the first end and running from the first end to the second end in a direction perpendicular to the longitudinal axis and opposite to the first direction, the locking channel being cut through the full thickness of the wall of the outer sheath such that a portion of the root runs through the second section and the first end, wherein the first section of the locking channel runs through at least one portion of the root and at least one portion of the crest of the external thread; and

d. a cavity detection system.