An objective optical system for endoscope consists of a front group having a negative refractive power, an aperture stop, and a rear group having a positive refractive power. The front group consists of a first lens having a negative refractive power and a second lens having a positive refractive power. The rear group consists of a third lens having a positive refractive power, a cemented lens of a fourth lens having a positive refractive power and a fifth lens having a negative refractive power, and a sixth lens having a positive refractive power. A shape of the second lens is a meniscus shape having a convex surface directed toward an image side. The sixth lens is cemented to a plane parallel plate, and the following conditional expressions (1) and (2) are satisfied:
1.0<f3/d6<2.8  (1)
1.7<|f1/f1<10  (2).

A method and apparatus for positioning a camera to capture images inside a body cavity of a patient during a medical procedure is disclosed. The apparatus includes an insertion tube, a plurality of connected linkages extending from a distal end of the insertion tube, each linkage having a threaded actuator received on a threaded end of a drive shaft extending between the threaded actuator and a proximal end of the insertion tube. The apparatus also includes a camera disposed at a distal end of the plurality of connected linkages. Each connected linkage has at least one associated movement actuated by movement of the threaded actuator in response to rotation of the drive shaft, the associated movements of the connected linkages together operable to facilitate positioning of the camera within the body cavity of the patient.

The disclosure relates to a distal endoscope head including a support for a vision system, the support being delimited on one side, by a proximal face and, on the opposite side, by a distal face into which the vision system opens out, the support being traversed by at least one hole of an operating channel opening out into the distal face by an ovoid section which decreases from the distal face of the support in the direction of the proximal face of the support.

A support device for an endoscope comprises a tubular member configured for removable attachment to an outer surface of the endoscope near, or at, its distal end and a plurality of projecting elements extending outward from the outer surface of the tubular member and circumferentially spaced from each other. The device includes an optically transparent cover coupled to the tubular member and configured for covering the distal end of the endoscope when the tubular member is attached to the outer surface of the endoscope. The projecting elements provide support for the endoscope, improve visualization and center the scope as it passes through a body lumen, such as the colon. In addition, the cover seals the distal end of the endoscope to protect the scope and its components from debris, fluid, pathogens and other biomatter.

An image capturing assembly is provided and includes an image sensing device, a first circuit board, a second circuit board and a lens assembly. The image sensing device includes an electrical connecting component. The first circuit board includes a first contact. The image sensing device is mounted on the first circuit board, and the electrical connecting component is electrically connected to the first contact. The second circuit board includes a second contact. The second circuit board is affixed with the first circuit board and perpendicular to the first circuit board, and the second contact is electrically connected to the first contact, so that the second contact is electrically connected to the electrical connecting component by the first contact. The lens assembly is assembled with the image sensing device. Furthermore, a related endoscope is provided.

A medical device including a handle including an actuation device, a sheath extending from the handle and having a longitudinal axis, the sheath defining an imaging lumen extending from the handle to a distal end of the sheath, an imaging device at a distal end of the sheath, and a piezoelectric member connected to the imaging device, where movement of the piezoelectric member moves the imaging device in a first direction relative to the longitudinal axis.

A system for supplying insufflation gas for a surgical procedure includes first and second insufflation gas inlets for receiving insufflation gas from at least two insufflation gas supply tanks located in an operating room; an insufflation gas outlet for providing a flow of insufflation gas supplied via the first and second insufflation gas inlets; and a valve system configured to automatically switch from insufflation gas supply via the first insufflation gas inlet to insufflation gas supply via the second insufflation gas inlet to maintain insufflation gas flow at the insufflation gas outlet.

Endoscopes of this disclosure, such as colonoscopes, provide a broader field of view and allow extended access of surgical tools, and also enable efficient packing of all necessary elements in the tip section, while maintaining their functionality. Methods and systems of this disclosure include for capturing and displaying still and video images using an endoscope corresponding to a left-side looking viewing element, a front-looking viewing element, and a right-side looking viewing element of an endoscopic tip generated in a native aspect ratio.

Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end. The tool for manipulating vessels may have a low-profile for increased visibility of operation, and may be coupled to the cannula with a damping mechanism to reduce the possibility of avulsion of the vessels. Various vessel cutting and sealing devices are provided that may accommodate various sizes of vessels and improve cutting and sealing efficacy.

A feeding tube assembly and feeding tube tip secure a viewing lens proximal of the distal end of the feeding tube tip. The feeding tube tip can include a plurality of protrusions that extend radially inward to secure the viewing lens. The feeding tube assembly and feeding tube tip can be used to improve image quality by keeping tissue from abutting the viewing lens as the feeding tube tip is inserted into a patient.