High performance cannulas

Details High performance cannulas High performance cannulas

2011-06-28

2011-06-28

Lucchesi, Nicholas D (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

C604S104000, C604S509000

Reexamination Certificate

active

07967776

ABSTRACT:
A cannula having a proximal end, a distal end, and a lumen extending between the proximal and distal ends is provided. The diameter of the lumen of the cannula can be varied to take into account differences in the diameter of access and target vessels during cannulation. The cannula is further characterized by at least one mechanism that, upon actuation, serves to alter the conformation of the cannula between a normal profile conformation and a low profile conformation. The normal profile conformation is characterized by the cannula having a lumen diameter at the point of insertion, which is smaller than the lumen diameter both proximal and distal to the point of insertion, with the lumen diameter distal to the point of insertion also expandable to the diameter of the cannulated vessel of the patient. The low profile conformation is characterized by the cannula having a lumen diameter at the point of insertion that is greater than the lumen diameter distal to the point of insertion.

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