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随机选择512例发育正常、行气管内麻醉的小儿,男250例,女262例,年龄1～12岁,体重6～42kg。常规麻醉诱导后插入能通过声门及声门下区的最粗导管(SHERIDAN),漏气压>2.35kPa。与传统计算公式ID(导管内径)=4+0.25×年龄相比,多数病儿所选导管较粗。由此得出实际选用的气管导管与年龄的关系为ID=4.4564+0.2230×年龄(r=0.8827)。我们发现按照传统公式选择的导管在婴幼儿可出现明显的漏气,6岁以后的儿童随着年龄增长,喉头最狭窄的部位上移至声门处,且声门并不呈圆形,有时需选用带套囊导管以防漏气,从而使较大年龄儿童所用导管与传统公式预测值较为接近。上述现象我们不能排除由于目前儿童营养状况改善,生长发育良好,在一
512 randomly selected children with normal development and endotracheal anesthesia, including 250 males and 262 females, aged 1 to 12 years and weighing 6 to 42 kg. After the induction of conventional anesthesia, the catheter was inserted through the glottis and the subglottic area of the roughest catheter (SHERIDAN), leakage pressure> 2.35kPa. Compared with the traditional formula ID (catheter diameter) = 4 + 0.25 × age, most of the sick children choose the catheter thick. From this we can conclude that the relationship between the actual tracheostomy tube and the age is ID = 4.4564 + 0.2230 × age (r = 0.8827). We found that catheters selected according to the traditional formula showed obvious air leaks in infants and young children. Children aged 6 years old moved to the glottis at the narrowest part of the throat with age, and the glottis did not appear circular. Sometimes, Need to use a cuff catheter to prevent leaks, so that the larger age of the catheter used by children and the traditional formula predictive value is closer. We can not rule out the above phenomenon due to the current nutritional status of children to improve, grow well, in a