Trocar device
First Claim
1. A trocar applicator for applying a trocar to pierce an abdominal wall, said applicator comprising:
- a housing comprising;
a lower pad having a orifice through which said trocar can extend; and
a vertical frame mounted on said pad;
force means for driving said trocar through said abdominal wall, said force means mounted to said frame distal from said pad;
means for maintaining said force means in a deactivated position and for activating said force means to drive said trocar; and
at a position intermediate between said pad and said force means attached to said vertical frame, trocar limiting means for limiting the distance said trocar is driven through said abdominal wall.
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Accused Products
Abstract
A trocar device is disclosed which is adapted for insertion into a body cavity, such as the abdominal cavity, without the need for cavity insufflation. The trocar device comprises applicator and trocar components. The trocar components comprises a cylindrical trocar tube and detachable obdurator. The applicator comprises a housing into which the trocar and obdurator are loaded prior to insertion, and means for applying a force, such as a spring or electric motor, to drive the obdurator and trocar through the body wall into the cavity. Various electrical and mechanical means are provided for limiting the penetration depth of the obdurator. In one embodiment, sonic transducer means are provided for detecting a phase change in reflected sonic waves at the internal body wall boundary to stop trocar penetration. Several alternative embodiments of the apparatus and method of use are disclosed.
211 Citations
11 Claims
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1. A trocar applicator for applying a trocar to pierce an abdominal wall, said applicator comprising:
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a housing comprising; a lower pad having a orifice through which said trocar can extend; and a vertical frame mounted on said pad; force means for driving said trocar through said abdominal wall, said force means mounted to said frame distal from said pad; means for maintaining said force means in a deactivated position and for activating said force means to drive said trocar; and at a position intermediate between said pad and said force means attached to said vertical frame, trocar limiting means for limiting the distance said trocar is driven through said abdominal wall. - View Dependent Claims (2)
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3. A trocar device for inserting a trocar through the abdominal wall and into the abdominal cavity of a patient, said trocar device comprising:
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a trocar assembly comprising; a cylindrical trocar tube; trocar stopping means comprising an outwardly extending protuberance; an obdurator extending through said cylindrical tube and having a sharp end extending past one of said ends of said cylindrical tube; and means for locking said obdurator into position within said tube; and an applicator device comprising; a lower pad having a orifice through which said trocar can extend; a vertical frame mounted on said pad; force means for driving said trocar through said abdominal wall; trigger means for maintaining said force means in a deactivated position and for activating said force means to drive said trocar; trocar limiting means for limiting the distance said trocar is driven through said abdominal wall; said vertical frame including a region having coarse internal threads spaced apart from and below said force means, said region having a narrower separation than the separation between other portions of said frame between said force means and said threaded region; and wherein said trocar limiting means comprises; a slip-ring having an internal diameter larger than said cylindrical tube and extending inwardly sufficient to engage said protuberance, said slip ring is adapted to adjustably engage said coarse internal threads inside said vertical frame for adjusting said penetration distance; whereby said cylindrical trocar tube is prevented from penetrating once said protuberance abuts said slip-ring. - View Dependent Claims (4, 5)
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6. A trocar device for inserting a trocar through the abdominal wall and into the abdominal cavity of a patient, said trocar device comprising:
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a trocar assembly comprising; a cylindrical trocar tube; an obdurator extending through said cylindrical tube and having a sharp end extending past one of said ends of said cylindrical tube; means for locking said obdurator into position within said tube; and an applicator device comprising; a lower pad having a orifice through which said trocar can extend; force means comprising an electric motor coupled to a traction wheel adapted to apply a tractional force to drive said trocar into said abdominal wall; a vertical frame mounted on said pad; an electric switch means for selectively applying electrical energy to said electric motor to drive said trocar; trocar limiting means for limiting the penetration of said trocar comprising; sonic transceiver means for transmitting sonic waves from said obdurator and for receiving reflection signals of said transmitted waves; signal analysis means for analyzing said reflection signals and for determining when said obdurator traverses said abdominal wall and penetrates said abdominal cavity; and means responsive to said signal analysis means for controlling said electric motor to stop driving said trocar when said abdominal wall has been penetrated a predetermined distance.
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7. A trocar applicator for applying a trocar to pierce an abdominal wall, said applicator comprising:
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a housing comprising; a lower pad having a orifice through which said trocar can extend; and a vertical frame mounted on said pad; force means for driving said trocar through said abdominal wall, said force means mounted in said frame distal from said pad; means for maintaining said force means in a deactivated position and for activating said force means to drive said trocar; and at a position intermediate between said pad and said force means attached to said vertical frame, trocar limiting means for limiting the distance said trocar is driven through said abdominal wall; wherein said lower pad comprises a plurality of pad section connected by a first hinge means; and said vertical frame comprise a plurality of separable vertical sections adapted to separate from and join with one another to open and close a space between said vertical sections for inserting and removing said trocar.
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8. A trocar device for inserting a trocar through a body wall and into the body cavity of a patient, said trocar device comprising:
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an applicator comprising; a pad adapted for placement adjacent said body wall and having a orifice through which said trocar can extend; a vertical frame mounted on said pad; force means attached to said vertical frame for driving said trocar toward said pad and through said body wall; trigger means for maintaining said force means in a deactivated position and for activating said force means to drive said trocar; and trocar penetration limiting means for limiting the distance said trocar is driven by said force means; and a trocar assembly comprising; a cylindrical trocar tube having two ends; trocar stopping means for cooperating with said trocar limiting means to limit the distance said trocar is driven by said force means; an obdurator extending through the interior of said cylindrical tube and having a sharp end extending past one of said ends of said cylindrical tube; and means for locking said obdurator into a predetermined position within said tube; whereby said cylindrical trocar tube is prevented from being driven further into said body wall once said trocar stopping means cooperatively engages said trocar penetration limiting means. - View Dependent Claims (9, 10, 11)
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Specification