31. Second, the cannulas McFarland sells are slightly different from medical cannulas and therefore not prescription devices. 32. Second, the cannulas McFarland sells are slightly different from medical cannulas and therefore not prescription devices. 33. Oxygen from gas bottles or liquid containers can be applied directly via a nasal cannula or mask. 34. For this reason it is advisable to site the first cannula at the most distal appropriate vein. 35. The needle is then removed, leaving the cannula in place, which is sometimes trimmed down. 36. The nasal cannula was invented by Wilfred Jones and patented in 1949 by his employer, BOC. 37. Finally, a sterile cannula is inserted into the uterus and attached via tubing to the pump. 38. Chemical stimulation is typically administered through a cannula that is inserted into the brain via stereotactic surgery. 39. Insulin pumps may be like'electrical injectors'attached to a temporarily implanted catheter or cannula . 40. Power-assisted liposuction : the cannula is inserted to about 80 % of its full length.
