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Physiological fluid shunt system and improvements therefor

  • US 4,382,445 A
  • Filed: 12/04/1980
  • Issued: 05/10/1983
  • Est. Priority Date: 12/04/1980
  • Status: Expired due to Term
First Claim
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1. A catheter assembly for a physiological fluid shunt system comprising:

  • catheter means for draining fluid from a source of a patient,said catheter means having a first tubular section and a second tubular section, each of said tubular section being adapted to be restrained at an end portion by attachment to the patient'"'"'s body,said first tubular section having an outer diameter less than the outer diameter of said second tubular section,at least a position of said first tubular section being concentrically inserted within at least a portion of said second tubular section in spaced relationship to permit relative movement automatically therebetween in response to the application of tensile force to said catheter means as a result of physiological growth of the patient,sealing means disposed between said first and second tubular sections to permit said relative movement and prevent the passage of fluid being drained through the space therebetween, said sealing means includes at least one continuous annular gasket member extending between said first and second tubular sections and frictionally contracting one of said first and second tubular sections,said at least gasket member includes a one continuous flange member coupled to said first tubular section and extending outward to contact said second tubular section at a peripheral edge portion, said flange member having an outer diameter greater than the inner diameter of said second tubular section to cause said flange member to deflect at said end portion and create sealing contact therewith while permitting relative movement between said first and second tubular members in response to physiological growth of the patient,said sealing contact occurring at an outer region of said flange member adjacent said edge portion for attaining enhanced sealing contact and preventing relative movement except as a result of the forces generated by the patient'"'"'s physiological growth.

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