Stepped cannula

Stepped cannula

  • CN 102,626,336 A
  • Filed: 10/05/2005
  • Published: 08/08/2012
  • Est. Priority Date: 10/05/2004
  • Status: Active Application
First Claim
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1. one transmit the method that one or more materials send the brain that is delivered to study subject, said method comprises the following steps:

  • A) location one stepped cannula on the brain of study subject, wherein, the backflow of said one or more materials of the brain of this intubate minimizing study subject, wherein, this intubate comprises;

    I) pipeline section of a plurality of coaxial arrangement, each pipeline section have the external diameter that limits this cannula outer diameter, and wherein, the external diameter of pipeline section is different;

    Ii) extend through the one or more tubular part of the tube chamber of this intubate, at least one tubular part comprises that one reduces the pipe that is sent to central nervous system'"'"'s material unaccounted-for (MUF) through said intubate;

    And at least one tubular part extends 1mm to 10mm beyond the far-end of this tube chamber;

    B) use a transmission to strengthen pump and transmit these one or more materials to said brain through said intubate, wherein at least a material comprises an AAV carrier.

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