Trocar entry incorporating an airbag
First Claim
Patent Images
1. An airbag cannula comprising:
- a cannula having a housing and an elongate tubular member extending distally from the housing;
an expandable member positioned on the elongate tubular member proximal of a distal end of the elongate tubular member, the expandable member movable from a collapsed position to an expanded position;
a sensor disposed within the housing, the sensor having a sensor lumen extending therefrom, the sensor lumen formed through the elongate tubular member and having a sensor opening adjacent to the distal end of the elongate tubular member distal of the expandable member; and
a trigger mechanism operatively associated with the sensor and the expandable member such that a change of condition sensed at the sensor opening operates to move the expandable member from the collapsed to the expanded position.
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Accused Products
Abstract
A safety trocar assembly incorporating an airbag is provided to prevent overpenetration of the safety trocar assembly through an abdominal wall and into a body cavity. The safety trocar assembly includes an airbag cannula having an expandable airbag proximal of the distal end of the cannula. A sensing device is located at a distal end of the cannula for detecting changes in conditions at the distal end of the cannula. A trigger mechanism is provided on the cannula and operates to inflate the airbag in response to a change in condition detected by the sensing device.
18 Citations
20 Claims
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1. An airbag cannula comprising:
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a cannula having a housing and an elongate tubular member extending distally from the housing; an expandable member positioned on the elongate tubular member proximal of a distal end of the elongate tubular member, the expandable member movable from a collapsed position to an expanded position; a sensor disposed within the housing, the sensor having a sensor lumen extending therefrom, the sensor lumen formed through the elongate tubular member and having a sensor opening adjacent to the distal end of the elongate tubular member distal of the expandable member; and a trigger mechanism operatively associated with the sensor and the expandable member such that a change of condition sensed at the sensor opening operates to move the expandable member from the collapsed to the expanded position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An airbag cannula comprising:
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a cannula having a housing and an elongate tubular member extending distally from the housing; an expandable member positioned on the elongate tubular member proximal of a distal end of the elongate tubular member, the expandable member movable from a collapsed position to an expanded position; an inflation lumen extending at least partially through the elongate tubular member and being disposed in fluid communication with the expandable member; a sensor disposed within the housing, the sensor having a sensor lumen extending therefrom, the sensor lumen formed through the elongate tubular member and having a sensor opening adjacent to the distal end of the elongate tubular member; and a trigger mechanism operatively associated with the sensor and the expandable member such that a change of condition sensed at the sensor opening operates to move the expandable member from the collapsed to the expanded position, the trigger mechanism being disposed in fluid communication with the inflation lumen. - View Dependent Claims (13, 14, 15, 16)
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17. An airbag cannula comprising:
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a cannula having a housing and an elongate tubular member extending distally from the housing; an expandable member positioned on the elongate tubular member proximal of a distal end of the elongate tubular member, the expandable member movable from a collapsed position to an expanded position; a sensor disposed within the housing, the sensor having a sensor lumen extending therefrom, the sensor lumen formed through the elongate tubular member and having a sensor opening adjacent to the distal end of the elongate tubular member, the sensor opening being positionable against tissue; and a trigger mechanism operatively associated with the sensor and the expandable member such that a change of condition sensed by the sensor operates to move the expandable member from the collapsed to the expanded position. - View Dependent Claims (18, 19, 20)
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Specification