First-entry trocar system

摘要

A surgical access system comprises a trocar, an insufflating optical obturator slidably insertable into the trocar, and a laparoscope slidably insertable into the obturator. A distal end of the obturator comprises a tip, at least a portion of which comprises a wall with a generally uniform thickness comprising a transparent material. At least one vent hole disposed at the obturator tip is fluidly connected to a gas flow channel defined by an interior surface of the obturator and the laparoscope, which is fluidly connected to an insufflation gas inlet disposed at a proximal end of the trocar. Improved optical characteristics of the trocar system permit precise and accurate visual placement thereof into a body cavity. Accordingly the access system is suitable as a first entry surgical access system. Embodiments of the trocar access are also useful for drug delivery, and/or for fluid and/or tissue aspiration.

主权项

1. A surgical access system comprising:
a tubular trocar comprising a longitudinal axis, a proximal end, a distal end, an elongate cannula, and a seal assembly disposed at a proximal end of the cannula; a fluid inlet disposed at a proximal end of the access system; an obturator slidably insertable into the proximal end of the cannula and through the seal assembly, the obturator comprising a longitudinal axis, a proximal end, a distal end, a tubular shaft, a tapered tip disposed at the distal end of the obturator, at least one vent hole disposed on the tip in fluid communication with the fluid inlet, and a handle disposed at the proximal end of the obturator; the obturator having an inner surface that defines an inner contour and an outer surface that defines an outer contour; the obturator having a wall thickness defined between the inner surface and the outer surface; wherein, in transverse cross-section of the tip, the outer contour substantially matches the inner contour; wherein the outer contour and the inner contour, in transverse cross-section of the tip, have a hexagonal shape.