US 9,314,266 B2 · First-entry trocar system

Abstract

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.

Claims17

Dependent claims

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.

4 more elements

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;
and
a laparoscope having a longitudinal axis, a distal end, and a transverse cross section at the distal end that is circular in shape;
the distal end of the laparoscope is configured to contact the inner surface of the obturator at a portion of the tip that has a transverse cross-section of the tip that is non-circular in shape defining a gas flow channel between the laparoscope and the inner contour of the tip.

6 more elements

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 defines two diametrically opposed, substantially straight lines interconnected by two diametrically opposed, outwardly curved lines;
the outer contour substantially matches the inner contour which also has two diametrically opposed, substantially straight lines interconnected by two diametrically opposed outwardly curved lines in the same transverse cross-section of the tip;
and
a laparoscope having a longitudinal axis, a distal end, and a transverse cross section at the distal end that is circular in shape;
the distal end of the laparoscope is configured to contact the inner surface of the obturator at a portion of the tip that has a transverse cross-section of the tip that is non-circular in shape defining a gas flow channel between the laparoscope and the inner contour of the tip.

7 more elements

Dependencies are inferred from the claim text.

First-entry trocar system

Life of this patent

First-entry trocar system

Life of this patent

Abstract

Claims17