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Table 3 Gastrointestinal and urinary tract sonography protocol (GUTS) score

From: Predictive value of transabdominal intestinal sonography in critically ill patients: a prospective observational study

Grade 0 Grade 1 Grade 2 Grade 3 Grade 4
• SBD < 20 mm
• Peristalsis present
• SBD < 20 mm
• Peristalsis absent or non-effective
• SBD 20–30 mm
• Peristalsis absent, augmented, or non-effective
• IAP 12–15 mmHg
• SBD > 30 mm
• Peristalsis absent
• IAP 16–20 mmHg
• APP < 60 mmHg
• SBD > 30 mm
• Peristalsis absent
• IAP > 20 mmHg
• APP < 60 mmHg
  1. Our modified GUTS score was quoted from the detailed version presented in reference [24], which includes > 10 parameters
  2. SBD small bowel diameter, IAP intra-abdominal pressure, APP abdominal perfusion pressure