41. The cannula improves the respiratory distress, the oxygen saturation, and the patient's comfort. 42. When a surgical knot is formed outside the body it must be drawn into a laparoscopic cannula . 43. Use of the Trendelenburg position and mobilizing the uterus by a transvaginal cannula were introduced by Palmer. 44. A painful flush may indicate tissuing or phlebitis and is an indication that the cannula should be relocated. 45. Other workers recommend deeply scoring the cannula with a triangular file, then sharply snapping the weakened section. 46. A cannula or catheter inserted into an artery may be used to measure pulse pressure or pulmonary wedge pressures. 47. A peripheral cannula is the most common intravenous access method utilized in both hospitals and pre-hospital services. 48. The needle is pushed into the layer of fat below the skin, taking the plastic cannula with it. 49. The Omnipod takes this freedom away because the cannula component of the pump is fully integrated into the pod. 50. He inserted a cannula near the base of Palumbo's vena cava, the heart-lung bypass machine.