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Fig. 1 | Critical Care

Fig. 1

From: Blind bedside postpyloric placement of spiral tube as rescue therapy in critically ill patients: a prospective, tricentric, observational study

Fig. 1

Method of blind bedside postpyloric spiral tube placement. aThe whoosh test was performed by air insufflation with auscultation in the epigastrium, in which a gurgling was regarded as indicative of air entering the stomach while the absence of gurgling suggested the tube tip was located elsewhere (lung, esophagus, pharynx, and so on). bThe vacuum test was done by instilling 60 ml air with a 20-ml syringe three times and then aspirated. If the volume of air aspirated was < 20 ml the tube was likely postpyloric, while if the volume of air aspirated was > 40 ml the tube was likely intragastric. cThe pH test was taken by measuring the pH value of aspiration with a pH strip. Aspiration of pH <5.0 was deemed intragastric. Aspiration of pH 6 − 7 was deemed to be from the small bowel. dThe guide wire withdrawal test was conducted by pulling back the guide wire a little way (within 5 cm). In a coiled tube, the guide wire either could be withdrawn with resistance felt as “popping”, or could be withdrawn easily but was unable to be re-inserted without a degree of force

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