Abstract: Objective: To analyze the application effects of continuous low negative pressure suction in postoperative patients with oral cancer. Methods: Ninety-eight postoperative patients with oral cancer admitted to our hospital from January 2020 to June 2021 were selected as the study subjects, randomized into the control group (49 patients) and the experimental group (49 patients). The control group received temporary suction with disposable sputum suction tube, while the experimental group received continuous low negative pressure suction with sputum suction tube. The facial swelling situation, eating time, 24 h drainage volume, comfort level (VAS score), complications and drainage satisfaction of the two groups were observed. Results: The facial swelling situation of patients in the experimental group was better than that in the control group, and the eating time, 24 h drainage volume and VAS score were lower than those in the control group (P<0.05). The drainage satisfaction in the experimental group was better than the control group (P<0.05). The total incidence of complications in the experimental group was lower than that in the control group (P<0.05). Conclusion: The continuous low negative pressure suction with sputum suction tube has an ideal application effect in patients with oral cancer after surgery. It can improve the patient's drainage satisfaction and oral condition, reduce complications, shorten the eating time, reduce the 24h drainage volume, and improve the patient's comfort level. It can be further popularized in practice.

Key words: continuous low negative pressure suction; oral tumor; application effect; complication