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<p>Prolonged preoperative fasting is common in pediatric anesthesia, yet its effect on gastric residual volume (GRV) remains inadequately explored. We conducted a prospective cross-sectional study to examine the association between prolonged fasting duration and GRV measured using point-of-care gastric ultrasonography. A total of 491 children aged 1–12 years scheduled for elective surgery under general anesthesia after fasting more than 8&#xa0;h were included. GRV was measured using point-of-care gastric ultrasonography and calculated using a validated formula, then normalized to body weight. The primary endpoint was the association between fasting duration and weight-adjusted GRV (GRV/WT). Among the participants (median age 89 months; 308 boys), fifteen patients (3.05%) had a stomach at risk of aspiration (GRV/WT &gt; 1.25 mL kg<sup>−1</sup>) and 29 (5.91%) showed high-risk gastric antrum morphology. Spearman correlation analysis demonstrated no significant association between prolonged fasting duration and GRV/WT (ρ = 0.037, 95% CI: −&#xa0;0.054 to 0.128, <i>p</i> = 0.41). GRV/WT correlated positively with age and negatively with body mass index. These findings suggest that prolonged preoperative fasting does not independently associate with GRV in pediatric patients.</p>

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Gastric ultrasound reveals no association between prolonged fasting duration and gastric residual volume in pediatric patients

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月26日

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  • Qingda Wu,
  • Bin Liu,
  • Zhouwu Wang,
  • Lingzhi Chen,
  • Hao Liu,
  • Qi Zou,
  • Yongzhen Zhao,
  • Zhenhao Ding,
  • Lu Chen,
  • Zhenwei Zheng

摘要

Prolonged preoperative fasting is common in pediatric anesthesia, yet its effect on gastric residual volume (GRV) remains inadequately explored. We conducted a prospective cross-sectional study to examine the association between prolonged fasting duration and GRV measured using point-of-care gastric ultrasonography. A total of 491 children aged 1–12 years scheduled for elective surgery under general anesthesia after fasting more than 8 h were included. GRV was measured using point-of-care gastric ultrasonography and calculated using a validated formula, then normalized to body weight. The primary endpoint was the association between fasting duration and weight-adjusted GRV (GRV/WT). Among the participants (median age 89 months; 308 boys), fifteen patients (3.05%) had a stomach at risk of aspiration (GRV/WT > 1.25 mL kg−1) and 29 (5.91%) showed high-risk gastric antrum morphology. Spearman correlation analysis demonstrated no significant association between prolonged fasting duration and GRV/WT (ρ = 0.037, 95% CI: − 0.054 to 0.128, p = 0.41). GRV/WT correlated positively with age and negatively with body mass index. These findings suggest that prolonged preoperative fasting does not independently associate with GRV in pediatric patients.