Pneumoperitoneum needle
First Claim
Patent Images
1. A needle for introduction of gaseous media into a body cavity, which comprises:
- elongated means defining passageway means to direct gaseous media to the body cavity;
holding means attached to a proximal end portion of said elongated means; and
filter means associated with at least one of said holding means and elongated means for filtering the gaseous media prior to introduction into said passageway means.
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Abstract
A pneumoperitoneum needle comprises a lumen defining a passageway through which pneumoperitoneum gases may pass to the peritoneal cavity, a handle mechanism attached to a proximal end portion of the lumen and a filtration unit housed within the handle mechanism for filtering the pneumoperitoneum gases to be passed through the lumen. The filtration unit preferably includes a hydrophobic filter fabricated from a polytetrafluoroethylene material having a pore size ranging in value from about 0.2 to 0.5 microns. In an alternative embodiment, the filtration unit is incorporated within the handle mechanism of a Veress-type needle.
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Citations
28 Claims
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1. A needle for introduction of gaseous media into a body cavity, which comprises:
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elongated means defining passageway means to direct gaseous media to the body cavity; holding means attached to a proximal end portion of said elongated means; and filter means associated with at least one of said holding means and elongated means for filtering the gaseous media prior to introduction into said passageway means.
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2. A pneumoperitoneum needle, which comprises:
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elongated means defining a passageway for introduction of pneumoperitoneum gaseous media into the peritoneal cavity; handle means attached to a proximal end portion of said elongated means; and filter means associated with at least one of said handle means and said elongated means for filtering the pneumoperitoneum gaseous media to be passed through said elongated means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A pneumoperitoneum needle, which comprises:
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handle means having a proximal end and a distal end; an elongated sheath connected to said distal end of said handle means and defining a passageway through which pneumoperitoneum gases may pass to and from the peritoneal cavity; a stylet disposed within said passageway of said elongated sheath and longitudinally movable between a retracted position and an extended position, said stylet including a blunt end portion at a distal end thereof, said blunt end portion extending beyond said distal end of said elongated sheath when said stylet is in said extended position; spring means attached to a proximal end of said stylet and housed within said handle means for biasing said stylet to said extended position; and filter means housed within said handle means for filtering the pneumoperitoneum gases to be passed through said elongated sheath. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. In combination with a conduit through which gaseous fluids may be passed to and from a body cavity:
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housing means attached to a proximal end portion of the conduit; and filter means housed within said housing means for filtering the gaseous fluids to be introduced into the body cavity. - View Dependent Claims (23, 24, 25, 26)
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27. A pneumoperitoneum needle, which comprises:
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lumen means defining a passageway through which pneumoperitoneum gases may pass to and from the peritoneal cavity; handle means attached to a proximal end portion of said lumen means; and filter means housed within said handle means for filtering the pneumoperitoneum gases to be passed through said lumen means.
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28. A method for introducing gaseous media to a body cavity through a pneumoperitoneum needle which permits passage of pneumoperitoneum gaseous media therethrough, comprising:
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providing handle means at the proximal end portion of said needle, said handle means adapted and configured for holding said needle and for housing filter means for filtering the pneumoperitoneum gaseous media prior to passage through said needle; applying a distal force to said handle means so that a piercing end of said needle penetrates the inner lining of the peritoneal cavity; and supplying the pneumoperitoneum gaseous media through said handle means so that said filter means filters the gaseous media prior to passage through said needle and into the peritoneal cavity.
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Specification