Journal of Hebei Medical University ›› 2023, Vol. 44 ›› Issue (8): 967-971.doi: 10.3969/j.issn.1007-3205.2023.08.018

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Comparision of the clinical effect of endotracheal intubation via preinflated and reinflated BlockBuste laryngeal mask

  

  1. Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
  • Online:2023-08-25 Published:2023-08-28

Abstract: Objective To observe the clinical effect of endotracheal intubation via preinflated and reinflated BlockBuster laryngeal mask airway (LMA). 
Methods A total of 52 patients were selected for intubation and surgery under general anesthesia, and all patients underwent preinflation and reinflation of the LMA cuff. After induction of intravenous anesthesia, a LMA was placed after the jaw had relaxed, a visual flexible endoscope was preinflated to check the grading and position of the glottis exposure, and the tip of the tracheal catheter was guided into the trachea (the flexible endoscope did not enter the glottis). After reinflating and inserting the LMA, the cuff was reflated until the pressure inside the cuff was 60 cmH2O. The other procedures were the same as those of preinflation. The grading of glottic exposure and glottic position under the visual flexible endoscope via the LMA were observed and recorded. The number and success rate of endotracheal intubation via LMA, the surface blood staining during the removal of the LMA after surgery, the blood staining at the end of the tracheal catheter during tracheal extubation, and the occurrence of adverse reactions at 24 h after surgery were recorded. 
Results Forty patients (76.9%) had glottic exposure grade 1 and grade 2 during preinflation of the LMA cuff; Forty-eight patients (92.3%) had glottic exposure grade 1 and grade 2 during the reinflation of the LMA cuff, which were higher than those during the preinflation of the LMA cuff (P<0.05). In the case of reinflation of the MA cuff, the proportion of glottis position in the median section was higher than that of preinflation of the LMA cuff (P<0.05). During the preinflation of the LMA cuff, 43 patients were successfully intubated via the LMA at the first attempt, and intubation was failed in 9 patients. Among them, 3 patients were successfully intubated at the second attempt after adjusting the glottis position, and intubation was failed in 6 patients due to the high glottis position. When the LMA cuff was reinflated, 50 patients were successfully intubated via the LMA at the first attempt, and intubation was failed in 2 patients, of whom 1 case was successfully intubated at the second attempt after the rotation of the tracheal catheter. The first-attempt success rate of endotracheal intubation via LMA during the reinflation of the LMA cuff was higher than that during the preinflation of LMA cuff (P<0.05). 
Conclusion When endotracheal intubation is carried out via BlockBuster LMA, the method of cuff reinflation can significantly improve the glottis exposure grade, the conditions of intubation, and the first-attempt success rate of endotracheal intubation.


Key words: laryngeal masks, BlockBuster laryngeal mask, preinflation, reinflation