PubMed
Results include a recent systematic review, “Implementation of the evidence review on best practice for confirming the correct placement of nasogastric tube in patients in an acute care hospital,”  that aims to define best practices for ensuring proper placement of tube in acute care hospital setting.
http://www.ncbi.nlm.nih.gov/pubmed?otool=emorylib&term=(”Intubation, Gastrointestinal/methods”[MAJR]) AND (suction OR decompression OR medical errors) AND English[lang] AND systematic[sb]
If you want to look at other literature besides systematic reviews, just removew the systematic[sb] from the PubMed search box.

CINAHL
Used search statement similar to PubMed search above.  Most of the relevant references were older, so that information should be covered in the systematic review noted in the PubMed search.  You can view results here.

Reviewed 4/14/14  AA