A search of Joanna Briggs, PubMed, and CINAHL identified the following relevant references.

Joanna Briggs Institute
No documents focusing on sleep and patient safety

CINAHL
The search (MH “Nursing Staff, Hospital” OR MH “Nurses+”) AND (safety OR error*) AND sleep LIMITERS: Research articles identified observational studies on effects of sleep on safety, including Johsnon 2014, Lockley 2007, Admi 2008, Biddle 2011, and Muecke 2005.  There was at least one study evaluating an intervention (Scott 2010). No articles by Geiger-Brown, who has written on nurses and sleep, appeared in search results above or in this search: sleep AND safety AND geiger-brown.

A search of Geiger Brown and sleep in CINAHL identified these papers.

PubMed

A search for articles by Geiger-Brown and sleep in PubMed identified an additional article that specifically mentions safety:
Sleep, sleepiness, fatigue, and performance of 12-hour-shift nurses. Chronobiol Int. 2012 Mar;29(2):211-219.

An additional search in PubMed for “Nurses”[Mesh] AND “Sleep”[Mesh] AND (“Safety”[Mesh] OR “Medical Errors”[Mesh]) found the following two articles.

Dorrian, Jillian, et al. “Sleep and errors in a group of Australian hospital nurses at work and during the commute.” Applied Ergonomics 39.5 (2008):605-613.

Dorrian, Jillian, et al. “A pilot study of the safety implications of Australian nurses’ sleep and work hours.” Chronobiology international 23.6 (2006):1149-1163.

Reviewed and updated 4/8/2014 ldt