Dinardi Ricardo Reis, de Andrade Cláudia Ribeiro, Ibiapina Cássio da Cunha
Department of Pediatrics, Pediatric Pulmonology Unit, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Int J Pediatr Otorhinolaryngol. 2013 Sep;77(9):1500-5. doi: 10.1016/j.ijporl.2013.06.018. Epub 2013 Jul 19.
Evaluate the cardio-respiratory capacity (VO₂max.) and peak nasal inspiratory flow (PNIF) of healthy adolescent athletes with experimental and placebo external nasal dilator strips (ENDS).
48 healthy adolescent athletes between the ages of 11 and 15 were evaluated and submitted to a cardio-respiratory 1000 m race in randomized order. The participants had peak nasal inspiratory flow (PNIF) values measured using the In-check-inspiratory flow meter. Dyspnea intensity was evaluated after a 1000 m test race using a labeled visual analog scale for dyspnea.
In relation to VO2max., when the participants used the experimental ENDS, significantly higher means were noted than when the placebo was used (53.0 ± 4.2 mL/kg min(-1) and 51.2 ± 5.5 mL/kg min(-1), respectively) (p<0.05). In relation to PNIF, there was a statistically significant difference between the experimental and placebo ENDS result, that being, 123 ± 38 L/min and 116 ± 38 L/min, respectively (p<0.05). The dyspnea perceived by the participants was representatively lesser in the experimental ENDS condition compared to the placebo after the cardio-respiratory test (p<0.05).
The results suggest that the ENDS improve maximal oxygen uptake, nasal patency and respiratory effort in healthy adolescent athletes after submaximal exercise.
使用实验性和安慰剂性外用鼻扩张条（ENDS）评估健康青少年运动员的心肺功能（最大摄氧量）和最大鼻吸气流量（PNIF）。
对48名年龄在11至15岁之间的健康青少年运动员进行评估，并让他们以随机顺序参加1000米心肺赛跑。使用In-check吸气流量计测量参与者的最大鼻吸气流量（PNIF）值。在1000米测试赛后，使用标记的视觉模拟呼吸困难量表评估呼吸困难强度。
关于最大摄氧量，当参与者使用实验性ENDS时，其平均值显著高于使用安慰剂时（分别为53.0±4.2毫升/千克·分钟⁻¹和51.2±5.5毫升/千克·分钟⁻¹）（p<0.05）。关于最大鼻吸气流量，实验性和安慰剂性ENDS的结果存在统计学显著差异，分别为123±38升/分钟和116±38升/分钟（p<0.05）。在心肺测试后，与安慰剂相比，参与者在实验性ENDS条件下感受到的呼吸困难明显较轻（p<0.05）。
结果表明，外用鼻扩张条可改善健康青少年运动员在次最大运动后的最大摄氧量、鼻腔通畅度和呼吸努力程度。
