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Peritoneal fluid treatment apparatus, package and method

  • US 4,553,960 A
  • Filed: 07/20/1984
  • Issued: 11/19/1985
  • Est. Priority Date: 09/25/1978
  • Status: Expired due to Fees
First Claim
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1. Peritoneal fluid treatment apparatus comprising:

  • intravascular catheter apparatus comprised of a first cannula connected to a hub and a stylet having handle means affixed at its first end and a sharp point at its second end, said stylet being removably positioned within said cannula so that said sharp point extends slightly beyond said cannula at the end opposite said hub, and wherein said stylet is removed from said cannula and hub after said cannula is positioned through the peritoneum;

    flexible guide means sized from about 20 to about 50 centimeters in length and from about 0.5 millimeters to about 3 millimeters in diameter for insertion into the peritoneal cavity through said first cannula, said guide means being sized in cross-section to fit within said first cannula and in length to be substantially longer than said first cannula, said guide means having a first end which is blunt for insertion into the peritoneal cavity, and said guide means being a stainless steel piano-wire-like wire made of a refractory metal having substantial flexibility from its first end to a point from about one-third to one-half the length of said guide means measured from said first end and thereafter said guide means has less flexibility along its length to its second end;

    a second cannula having a first end which remains anterior the patient and a second end which is tapered and sized in cross-section to fit slidably and snugly about said guide means, said second cannula being a flexible plastic-like tube having a plurality of spaced apart apertures formed in it from its second end to a point about one-third to one-half along its length for insertion into the peritoneal cavity with said apertures substantially therewithin, said second cannula being inserted over said guide means upon removal of said first cannula, said second cannula being sized in length to be substantially longer than said first cannula and in cross-section sufficient to allow said guide means to pass therethrough; and

    connector means adapted to the first end of said second cannula for connection to peritoneal fluid operation means upon removal of said guide means.

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