| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[6] Morphine, IV: American Society of Anesthesiologists Task Force on Sedation and Analgesia by Non-Anesthesiologists. Practice guidelines for sedation and analgesia by non-anesthesiologists. Anesthesiology. 2002 Apr;96(4):1004-17. http://www.ncbi.nlm.nih.gov/pubmed/11964611
Morphine, IV: The South African Society of Anaesthesiologists. South African Society of Anaesthesiologists Sedation Guidelines, 2015. South Afr J AnaesthAnalg 2015;21(2)S1-S36.http://www.sasaweb.com/content/images/SAJAA_V21N2_1665_Sedation_Guideline.pdf
Ketamine, IV: American Society of Anesthesiologists Task Force on Sedation and Analgesia by Non-Anesthesiologists. Practice guidelines for sedation and analgesia by non-anesthesiologists. Anesthesiology. 2002 Apr;96(4):1004-17. http://www.ncbi.nlm.nih.gov/pubmed/11964611
Ketamine, IV: The South African Society of Anaesthesiologists. South African Society of Anaesthesiologists Sedation Guidelines, 2015. South Afr J AnaesthAnalg 2015;21(2)S1-S36.http://www.sasaweb.com/content/images/SAJAA_V21N2_1665_Sedation_Guideline.pdf
Nitrous oxide, inhaled, in 20-30% oxygen: American Society of Anesthesiologists Task Force on Sedation and Analgesia by Non-Anesthesiologists. Practice guidelines for sedation and analgesia by non-anesthesiologists. Anesthesiology. 2002 Apr;96(4):1004-17. http://www.ncbi.nlm.nih.gov/pubmed/11964611