Aspiration with tube feeding

For patients intolerant of gastric feedings or in whom the risk of aspiration is high, feedings delivered with the tip of the tube past the pylorus into the duodenum or, preferably, the jejunum are preferred. 

EN can be associated with important complications, such as nausea and vomiting (20%), gastroesophageal reflux, diarrhea (2-63%), malabsorption, aspiration (1 %), and tube malposition. Associated causes include duodenal ulcer, pyloric channel ulcer, ileus, anticholinergic medications, opiates, central nervous system disturbances, metabolic derangements, and severe protein deficiency. Treatment with a small intestine feeding tube—nasoduodenal or jejunostomy—may overcome the problem. Medications should be... 

Hydraulic induced flotation units induce gas bubbles by gas aspiration into the low-pressure zone of a venture tube. Figure 3.40 shows a schematic cross section of a hydraulic induced flotation unit. Clean water from the effluent is pumped to a recirculation header (E) that feeds a series of Venturi eductors (B). Water flowing through the eductors sucks gas from the vapor space (A) that is released at the nozzle (G) as a jet of small bubbles. The bubbles rise, causing flotation in the chamber (C), forming a froth (D) that is skimmed with a mechanical device at (F). 

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