Abstract:Objective To investigate the efficacy and safety of Penehyclidine hydrochloride (PHC) combined with huffing manoeuvre in suppressing Fentanyl induced cough response (FIC) during anesthesia induction. Methods The clinical data of 220 patients who underwent surgical treatment from September 2015 to September 2016 in our hospital were randomly divided into 4 groups (55 in each). In group H, the patients recived PHC 0.01 mg/kg diluted with normal saline into 10 ml intravenous injection before 10 ml intravenous injection. In group P, the patients were given intravenous fentanyl immediately after three deep breaths. In group M, the patients receiving PHC 0.01 mg/kg diluted with normal saline into 10 ml intravenous injection before 10 min were given intravenous fentanyl immediately after three deep breaths. In group N, the patients were given intravenous rapid induction according to a certain induction order. The occurrence time and severity of coughing were recorded within 2 min after intravenous injection of Fentanyl, and the incidence of cough was calculated. The heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) and pulse oxygen saturation (SpO2) were measured 10 min before intravenous injection of Fentanyl or intravenous injection of Penehyclidine hydrochloride (T0), and 1 (T1) and 2 min (T2) after intravenous injection of Fentanyl; and the mean arterial pressure (MAP) was calculated. Results There were statistically significant differences in the degree of cough among the four groups (x2 = 153.424, p= 0.001). There were significant differences in cough occurrence time among the four groups ( x2= 26.509, p= 0.019). There were statistically significant differences in FIC incidence among the four groups (x2 = 12.488, p= 0.006). The incidence of FIC in the H group, the P group, the M group and the N group was 14.5% (8 cases), 12.7% (7 cases), 7.3% (4 cases) and 30.9% (17 cases) respectively. After merging the H group, the P group and the M group, and then compared with the N group, the difference was statistically significant (x2 = 11.337, p= 0.001). In the four groups, HR,SpO2 and MAP decreased gradually at T0, T1 and T2; HR and MAP at T2 were lower than those at T0, the differences were statistically significant (p < 0.05), the SpO2 at T0, T1 and T2 was not significantly different (p >0.05). There were no significant differences in the adverse reactions among the four groups (p > 0.05). Conclusions PHC combined with deep breathing method can effectively inhibit the occurrence of FIC, and is superior to either of PHC and deep breath, also has little impact on patients' hemodynamics with few adverse reactions and high safety.