Early identification of malignancy in trismus: ten-year evolution of a trismus checklist to improve patient safety.

Introduction Trismus has been identified as a red flag sign that may lead to an early identification of a malignant lesion. A simple checklist was devised to allow clinicians to identify patients who may be at risk.Methods The implementation of this checklist at the temporomandibular disorder clinic of the University Dental Hospital of Manchester has been audited through ten annual cycles, each examining a sample of 50 clinical records of patients referred to the clinic. The standards set were that the presence of the trismus checklist in new patient examination notes should be 100%, the recording of mouth opening should be 100% and that the trismus checklist should be correctly filled in 100% of the time.Results The incidence of trismus ranged from 0-20%. The presence of the trismus checklist in new patient examination notes ranged from 78-100% compliance. The recording of mouth opening ranged from 80-100% compliance. The trismus checklist was not always filled in correctly: it ranged from 50-100%.Conclusion The use of audit has led to the evolution of the checklist and to improvements in its implementation. The trismus checklist has aided the early identification of malignancy. Future work should look at its implementation in a wider range of settings.