Terminologies and references

SNOMED CT

This material includes SNOMED Clinical Terms® (SNOMED CT®) which is used by permission of the International Health Terminology Standards Development Organisation (IHTSDO). All rights reserved. SNOMED CT®, was originally created by The College of American Pathologists. “SNOMED” and “SNOMED CT” are registered trademarks of the IHTSDO.

Opus uses concepts from the SNOMED CT International Edition and the Australian extension (SNOMED CT-AU, released by the Australian Digital Health Agency). Codes were most recently checked against the International release of 1 October 2026 and the SNOMED CT-AU release of 30 June 2026. Term searches use the International release of 1 October 2026 on a terminology server that Opus runs itself.

Fracture classification

Fracture codes follow the AO/OTA Fracture and Dislocation Classification.

1. Meinberg EG, Agel J, Roberts CS, Karam MD, Kellam JF. Fracture and Dislocation Classification Compendium—2018. J Orthop Trauma. 2018;32 Suppl 1:S1–S170. doi:10.1097/BOT.0000000000001063

Cancer staging

TNM categories follow the AJCC Cancer Staging Manual, 8th edition. Opus derives them from the details you record; they are for documentation, not advice.

1. Amin MB, Edge SB, Greene FL, et al., eds. AJCC Cancer Staging Manual. 8th ed. Springer International Publishing; 2017.

Operative feedback

The entrustment ratings and teaching-feedback items draw on these published instruments. Opus is not a validated assessment tool, and its ratings are not formal workplace-based assessments unless your programme accepts them.

1. ten Cate O. Entrustability of professional activities and competency-based training. Med Educ. 2005;39(12):1176–7. doi:10.1111/j.1365-2929.2005.02341.x
2. Gofton WT, Dudek NL, Wood TJ, Balaa F, Hamstra SJ. The Ottawa Surgical Competency Operating Room Evaluation (O-SCORE): a tool to assess surgical competence. Acad Med. 2012;87(10):1401–7. doi:10.1097/ACM.0b013e3182677805
3. DaRosa DA, Zwischenberger JB, Meyerson SL, et al. A theory-based model for teaching and assessing residents in the operating room. J Surg Educ. 2013;70(1):24–30. doi:10.1016/j.jsurg.2012.07.007
4. Bohnen JD, George BC, Williams RG, et al. The feasibility of real-time intraoperative performance assessment with SIMPL (System for Improving and Measuring Procedural Learning). J Surg Educ. 2016;73(6):e118–e130. doi:10.1016/j.jsurg.2016.08.010
5. Roberts NK, Williams RG, Kim MJ, Dunnington GL. The briefing, intraoperative teaching, debriefing model for teaching in the operating room. J Am Coll Surg. 2009;208(2):299–303. doi:10.1016/j.jamcollsurg.2008.10.024

Independence

Opus is independent. It is not affiliated with or endorsed by SNOMED International, the Australian Digital Health Agency, the AO Foundation or the Orthopaedic Trauma Association, the American College of Surgeons (AJCC), the Royal Australasian College of Surgeons, or any other training body whose report layouts it can produce.

Opus is a documentation tool. It does not provide medical advice.