1. Gentle action
Sputum suction should be gentle and rapid to reduce damage to the tracheal wall. Generally choose the 12 or 14 gauge rubber or silicone catheter with moderate hardness, smooth surface and relatively large inner diameter, or use a special suction tube, or cut off the thicker blind end of the catheter to make it into a concave crescent Cut two small holes on both sides to reduce the negative pressure during suction and increase the suction area. If the patient feels pain at the sternum stem and blood in the sputum, he should be alert to the possibility of bleeding. Once hemorrhage occurs, tracheal intubation should be performed immediately, and rescue measures such as bleeding should be carried out at the same time.
2. Aseptic operation
Wash your hands before operation. The catheter is strictly disinfected. One catheter is used only once. When sucking sputum, adhere to the principle of from the inside to the outside, first suck the secretions in the trachea, and then suck the secretions in the nose and oral cavity.
3. Take a deep breath
Before sucking sputum, you should take a deep breath 3-5 times. If you use a ventilator, you need to hyperventilate for 2-3 minutes to increase the oxygen partial pressure in the alveoli, and then use the suction tube to suck the secretions quickly, accurately and gently. Lift and insert the sputum tube up and down, and a suction time of no more than 15 seconds, especially for patients with respiratory failure, a long time of negative pressure suction can cause hypoxia, difficulty breathing and suffocation. If there is too much secretion, it is difficult to breathe cleanly at a time, you should perform hyperventilation again or take a deep breath and then attract again.