Bisinotto Flora Margarida Barra, Naves Aline de Araújo, Lima Hellen Moreira de, Peixoto Ana Cristina Abdu, Maia Gisele Caetano, Resende Junior Paulo Pacheco, Martins Laura Bisinotto, Silveira Luciano A Matias da
Sociedade Brasileira de Anestesiologia, Rio de Janeiro, RJ, Brasil; Universidade Federal do Triângulo Mineiro (UFTM), Hospital de Clínicas, Uberaba, MG, Brasil; Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Botucatu, SP, Brasil; Universidade Federal do Triângulo Mineiro (UFTM), Disciplina de Anestesiologia, Uberaba, MG, Brasil.
Universidade Federal do Triângulo Mineiro (UFTM), Serviço de Radiologia e Diagnóstico, Uberaba, MG, Brasil.
Rev Bras Anestesiol. 2017 Jul-Aug;67(4):376-382. doi: 10.1016/j.bjan.2016.07.003. Epub 2016 Sep 3.
The current preoperative fasting guidelines allow fluid intake up to 2hours before surgery. The aim of this study was to evaluate the gastric volume of volunteers after an overnight fast and compare it with the gastric volume 2hours after ingestion of 200 and 500mL of isotonic solution, by means of ultrasound assessment.
Eighty volunteers underwent gastric ultrasound at three times: after 8hours of fasting; 2hours after ingestion of 200mL isotonic saline, followed by the first scan; and on another day, 2hours after ingestion of 500mL of the same solution after an overnight fast. The evaluation was quantitative (antrum area and gastric volume, and the ratio of participants' gastric volume/weight) and qualitative (absence or presence of gastric contents on right lateral decubitus and supine positions. A p-value<0.05 was considered significant).
There was no difference in quantitative variables at measurement times (p>0.05). Five volunteers (6.25%) had a volume/weight over 1.5mL.kg at fasting and 2hours after ingestion of 200mL and 6 (7.5%) after 500mL. Qualitatively, the presence of gastric fluid occurred in more volunteers after fluid ingestion, especially 500mL (18.7%), although not statistically significant.
Ultrasound assessment of gastric volume showed no significant difference, both qualitative and quantitative, 2h after ingestion of 200mL or 500mL of isotonic solution compared to fasting, although gastric fluid content has been identified in more volunteers, especially after ingestion of 500mL isotonic solution.
当前的术前禁食指南允许在手术前2小时内摄入液体。本研究的目的是通过超声评估，比较志愿者在禁食一夜后的胃容量与摄入200毫升和500毫升等渗溶液2小时后的胃容量。
80名志愿者在三个时间点接受胃超声检查：禁食8小时后；摄入200毫升等渗盐水2小时后，随后进行首次扫描；在另一天，禁食一夜后摄入500毫升相同溶液2小时后。评估包括定量（胃窦面积、胃容量以及参与者胃容量/体重的比值）和定性（右侧卧位和仰卧位时胃内容物的有无。p值<0.05被认为具有统计学意义）。
在测量时间点，定量变量无差异（p>0.05）。5名志愿者（6.25%）在禁食时以及摄入200毫升后2小时的容量/体重超过1.5毫升/千克，摄入500毫升后有6名（7.5%）。定性方面，摄入液体后更多志愿者出现胃液，尤其是摄入500毫升时（18.7%），尽管无统计学意义。
与禁食相比，摄入200毫升或500毫升等渗溶液2小时后，胃容量的超声评估在定性和定量方面均无显著差异，尽管在更多志愿者中发现了胃液，尤其是摄入500毫升等渗溶液后。
