Abstract: An overtube device and an endoscope assembly are provided, the overtube device includes an overtube body having a proximal end and a distal end, the overtube body is provided with a bore which extending from the distal end to the proximal end of the overtube body, the bore is configured to allow a passing portion of the endoscope assembly to pass therethrough; a pulling lumen is formed in the overtube body, which extends from the distal end to the proximal end of the overtube body, the pulling lumen is configured to allow a pulling part to pass therethrough, and the distal end of the pulling part is fixed with the distal end of the overtube body.

Abstract: An overtube device and an endoscope assembly are provided, the overtube device includes an overtube body having a proximal end and a distal end, the overtube body is provided with a bore which extending from the distal end to the proximal end of the overtube body, the bore is configured to allow a passing portion of the endoscope assembly to pass therethrough; a pulling lumen is formed in the overtube body, which extends from the distal end to the proximal end of the overtube body, the pulling lumen is configured to allow a pulling part to pass therethrough, and the distal end of the pulling part is fixed with the distal end of the overtube body.

Abstract: The present disclosure provides an endoscopic ultrasound needle device and a method for operating the same. The endoscopic ultrasound needle device includes a first needle defining a first bore; a second needle located in the first bore, wherein the second needle is adapted to move or reciprocate within the first bore in response to a manipulation of a component located adjacent or on a handle of the device; and a first cut edge on the first needle, defining an orifice or opening in open communication with the first bore, wherein the first cut edge cooperates with at least a portion of the second needle to cut or slice the tissue, during the second needle moves or reciprocates within the first bore, relative to the first needle, in the extension direction of the first bore, which has high tissue sampling efficiency.