Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-8702742-B2
Publication Date
2014-04-22
Expiration Date
Abstract
Systems and methods for using a trocar system are disclosed. The system generally includes a handle having a first end a second end, a trocar disposed adjacent the first end of the handle, cannulas disposed on the trocar, and a drive system. The drive system is disposed for forward movement of the cannulas in a longitudinal direction away from the second end of the handle.
Core Innovation
A trocar system includes a handle having a hollow interior section with a first end and a second end, and a longitudinally movable drive member positioned within the hollow interior section. The drive member has teeth and is configured for movement in a longitudinal direction, while a pawl is positioned within the hollow interior section and selectively engages one of the teeth to prevent rearward movement of the drive member.
The system further includes a plunger having a first end and a second end, where the second end of the plunger selectively engages one of the teeth to move the drive member forward in the longitudinal direction. A trocar is disposed adjacent the second end of the handle, and a cannula having a central opening for receiving the trocar is included.
The first end of the drive member is disposed relative to the cannula such that forward movement of the drive member by the plunger results in forward movement of the cannula in the longitudinal direction. The arrangement uses pawl-and-tooth selective engagement to create one-way, ratcheting-style motion in the longitudinal direction and prevent rearward movement during attempted reverse motion.
Claims Coverage
The independent claim coverage centers on a one-way longitudinal drive concept with two core inventive features. The claim set recites a handle, a toothed drive member, a pawl that prevents rearward movement, and a plunger that moves the drive member forward, together with a trocar and cannula interface that translates forward motion into cannula advancement.
Toothed drive member selectively moved forward and prevented from rearward movement by a pawl and plunger
A trocar system comprising a handle having a hollow interior section and first and second ends; a drive member positioned within the hollow interior section with teeth configured for movement in a longitudinal direction; a pawl positioned within the hollow interior section selectively engaging one of the teeth to prevent rearward movement of the drive member in the longitudinal direction; and a plunger with a second end disposed to selectively engage one of the teeth to move the drive member forward in the longitudinal direction.
Drive member arranged to advance the cannula in the longitudinal direction when driven forward
A trocar system including a trocar disposed adjacent the second end of the handle; a cannula having a central opening for receiving the trocar; and wherein the first end of the drive member is disposed relative to the cannula such that forward movement of the drive member by the plunger results in forward movement of the cannula in the longitudinal direction.
The inventive coverage is directed to selective tooth engagement for forward advancement and rearward prevention, with the drive member positioned to advance a cannula receiving the trocar.
Stated Advantages
Reducing time and cost by enabling insertion of multiple cannulas with a single tool.
Documented Applications
Ophthalmic/vitreo-retinal procedures using the disclosed trocar and cannula system for incision/cannulation workflows.
Interested in licensing this patent?