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Fluid aspiration device and technique for reducing the risk of complications

  • US 4,240,433 A
  • Filed: 07/22/1977
  • Issued: 12/23/1980
  • Est. Priority Date: 07/22/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for aspirating fluid from a body cavity, which comprises:

  • elongated substantially hollow needle means having a sharp tip at one end thereof for facilitating entry to a body cavity;

    elongated substantially hollow cannula means being movably disposed within said needle means, said needle means having an opening at said one end sized such that said cannula means may be slid through said opening;

    selectively inflatable balloon means connected to said cannula means so as to be positionable, upon inflation, between said tip and internal organs near said cavity for reducing the risk of puncture of said internal organs by said tip;

    a first fluid intake port in the wall of said needle means spaced from said opening; and

    a second fluid intake port positioned in the wall of said cannula means so as to be registrable with said first fluid intake port to permit flow therethrough.

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