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 and baying a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and having an end portion disposed 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 end portion of the sensor member operates to transition the expandable member from the collapsed to the expanded position;
wherein the expandable member is an airbag positioned on the elongate tubular member, the elongate tubular member including an inflation lumen in fluid communication with the airbag, wherein the trigger mechanism includes a valve to inflate the airbag in response to a change in conditions detected by the sensor, wherein a distal end of the airbag is longitudinally movable along an outer surface of the elongate tubular member.
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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.
16 Citations
16 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 and baying a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and having an end portion disposed 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 end portion of the sensor member operates to transition the expandable member from the collapsed to the expanded position; wherein the expandable member is an airbag positioned on the elongate tubular member, the elongate tubular member including an inflation lumen in fluid communication with the airbag, wherein the trigger mechanism includes a valve to inflate the airbag in response to a change in conditions detected by the sensor, wherein a distal end of the airbag is longitudinally movable along an outer surface of the elongate tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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 to 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 and having a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and haying an end portion disposed 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 said portion of the sensor member operates to transition the expandable member from the collapsed to the expanded position, the trigger mechanism being disposed in fluid communication with the inflation lumen, wherein the trigger mechanism is fluidly connected to the inflation lumen by a tube external to the enlongate tubular member. - View Dependent Claims (10, 11, 12)
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13. An airbag cannula comprising:
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a cannula having a housing and an enlongate 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 and having a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and having an end portion disposed adjacent to the distal end of the elongate tubular member, the end portion of the sensor member being positionable against tissue, wherein the sensor is an air pressure sensor configured to detect changes in air pressure at the end portion of the sensor member and within the sensor member; 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 transition the expandable member from the collapsed to the expanded position. - View Dependent Claims (14)
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15. 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 and having a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and having an end portion disposed adjacent to the distal end of the elongate tubular member distal of the expandable member; a trigger mechanism operatively associated with the sensor and the expandable member such that a change of condition sensed at the end portion of the sensor member operates to transition the expandable member from the collapsed to the expanded position, wherein the expandable member is an airbag positioned on the elongate tubular member, the elongate tubular member including an inflation lumen in fluid communication with the airbag, wherein the trigger mechanism includes a valve to inflate the airbag in response to a change in conditions detected by the sensor; and an outer sheath overlying the airbag to restrain the airbag in the collapsed position, the outer sheath including a perforation line which is separable upon inflation of the airbag from the collapsed to the expanded position.
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16. 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 proximail 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 and haying a sensor member extending therefrom, the sensor member being formed through the elongate tubular member and having an end portion disposed adjacent to the elongate tubular member, the end portion of the sensor member being positionable against tissue, wherein the sensor is an electrical sensor configured to detect changes in resistance at the end portion of the sensor member; 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 transition the expandable member from the collapsed to the expanded position.
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Specification