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. 2025 Feb 17;62:e24107. doi: 10.1590/S0004-2803.24612024-107

TABLE 2. Rao technique description to perform a small bowel culture aspiration.

Steps Description
Materials needed Upper endoscopy 6F Liguory catheter (COOK Medical, Bloomington, Ind, USA)
Sterile gloves / Sterile cap / 5-mL sterile syringe.
Initial test preparation Prepare the catheter assembly and aspiration kit using sterile gloves.
Introduction of endoscope A sterilized upper endoscope, flushed with sterile water before intubation, is passed into the small bowel with minimal air insufflation.
Catheter insertion Endoscopist staff changes to sterile gloves during specimen collection. Then, he passes the Liguory catheter through the biopsy channel of the scope, using a short overtube to prevent valve contamination.
Aspiration 1. The assistant managing the syringe typically sits for gravity-assisted suction, gently aspirating fluid by repeated suctions with a 5 mL syringe connected to a 3-way stopcock.
2. Between 3 to 5 minutes, 2-5 mL of bile-stained small bowel juice is successfully aspirated. (If aspirate collection is delayed, massaging the liver area can facilitate bile flow into the intestinal lumen).
3. The syringe is capped with a sterile cap, immediately placed in a biohazard bag, and sent to the microbiology laboratory for aerobic and anaerobic cultures.