• 
  

  • Therapeutically: To remove gastric contents after poisoning or drug overdose.

  
  

  • Diagnostically: To confirm upper gastrointestinal bleeding.

Absolute

• 
  

  • Unstable airway.

  
  

  • Intestinal perforation.

  
  

  • Cervical spine trauma.

  
  

  • Facial trauma.

Relative

• 
  

  • Coagulopathy (prothrombin time > 18 seconds).

  
  

  • Thrombocytopenia (platelet count < 100,000/mcL).

  
  

  • Recent intestinal tract surgery (< 1 month ago).

• 
  

  • Lubricant gel.

  
  

  • Large bore orogastric tube.

  
  

  • Terumo 60-mL catheter tip syringe.

  
  

  • Normal saline at 38 °C.

  
  

  • Drainage basin.

  
  

  • Stethoscope.

• 
  

  • Perforation.

  
  

  • Bleeding.

• 
  

  • Measure length of tube insertion by positioning the tube from the nares or mouth to the ear, and to the umbilicus.

  
  

  • There is also a standard table, which uses height of child.

  
  

  • If the tube is obstructed, flush first with water; longstanding obstruction may be removed by flushing the tube with caffeinated soda.