Technique of venous catheterization for sequential blood sampling from the pig.

A surgical technique for catheter implantation for sequential blood sampling in the pig is described. This methodology minimizes stress to the animal and chances of catheter dislodgement, both of which are detrimental to accurate long-term metabolic assessment of the animal model. The technique involves implantation of a vinyl catheter via the external jugular vein into the vena cava. To ensure catheter retention, the method uses a silicone plug fitted to the catheter and located cranial to its entry to the vein, double ligation at the venous insertion, subsequent passage of the catheter to exit 10 cm cranial to the scapula on the dorsal midline, and a denim vest fitted to the thorax. With this technique seven out of nine catheters have functioned more than 50 days, two functioned for approximately 100 days, and one for over 150 days.