The Influence Of Head Deflection On Ventilation Effect And The Change Of Intracuff Pressure Using The CLMA In Pediatric Patients

Objective:Objective to investigate the effects of head deflection from median position to the lateral position on the ventilation effect and the change of cuff pressure of classic laryngeal mask in pediatric patients.Methods:60 cases of children admitted to our hospital from February 2019 to February 2020 who needed ear-related surgery were selected as the research objects.According to the Angle of head deflection,they were divided into three groups:group A(60°),group B(70°)and group C(80°),with 20 cases in each group.The effects of head deflection Angle on the ventilation effect and the intracuff pressure of the classical laryngeal mask the complication s in three groups were compared.Results:The differences in Tidal volume(TV),peak airway pressure(Ppeak),End-tidal carbon dioxide(PetCO2)and intracuff pressure,were statistically significant among the three groups(P<0.05)at a lateral position.In Ppeak,group A was less than group B,group C,and group B was less than group C.In the lateral PetCO2,group A was smaller than group B and group C.The differences in TV,intracuff pressure and PIP between the three groups were statistically significant(P<0.05),and group A was smaller than group B and group C,and group B was smaller than group C.Among the three groups,the difference of complication s was statistically significant(P<0.05),and the complication s in group C were greater than that in group A.There were no statistically significant differences in neutral TV,intracuff pressure,Ppeak and PetCO2 between the three groups(P>0.05).The neutral position and deflection position in each group were compared on TV,intracuff pressure,Ppeak and PetCO2,and the differences were statistically significant(P<0.05).There were no statistically significant differences among the three groups in weight,gender,age,neutral TV,intracuff pressure,Ppeak and PetCO2(P>0.05)Conclusion:Although the TV,Ppeak and intracuff pressure of CLMA changed significantly after the head was deflected from the neutral position to the side,it could still meet the surgical requirements and achieve satisfactory ventilation effect,and it was more suitable for operations that require deflection of the child’s head when the head was deflected at an Angle of 60 degrees.