Limitations in validating emergency department triage scales
ABSTRACT
Objective: To examine whether current validation methods of emergency department triage scales actually assess the instrument’s validity.
Methods: Optimal methods of emergency department triage scale validation are examined in developed countries and their application to developing countries is considered.
Results and conclusion: Numerous limitations are embedded in the process of validating triage scales. Methods of triage scale validation in developed countries may not be appropriate and repeatable in developing countries. Even in developed countries there are problems in conceptualising validation methods. A new consensus building validation approach has been constructed and recommended for a developing country setting. The Delphi method, a consensual validation process, is advanced as a more appropriate alternative for validating triage scales in developing countries.
Imaging the oesophagus after penetrating cervical trauma using water-soluble contrast alone: simple, cost-effective and accurate
ABSTRACT
Aim: This audit aims to gauge the safety and efficacy of iso-oncotic water-soluble contrast media as the sole imaging evaluation of the distal pharynx and cervical oesophagus after penetrating cervical trauma.
Methods: A retrospective audit was performed over a 4-year period of all patients with penetrating cervical trauma to zones 1 and 2 of the neck who were subjected to imaging evaluation as part of a selective non-operative management policy for penetrating cervical trauma. The outcome was reviewed and the sensitivity, specificity and predictive values of the investigation were determined. The surgical management of identified injuries is also described.
Results: Four hundred and sixty-five contrast studies were included with 11 studies positive for pathology (9 injuries, 2 incidental findings). Surgery was undertaken in 4 patients with cervical oesophageal injuries and conservative management was carried out in 5 cases of distal pharyngeal injury. No missed injuries and no significant adverse events were identified during the study period.
Conclusion: A contrast study of the oesophagus with water-soluble iso-oncotic contrast media as the sole diagnostic imaging modality is safe (avoiding the risk of aspiration pneumonia), reliable (identifying all injuries) and cost-efficient (avoiding the need for additional expensive investigations) in cases of penetrating cervical trauma.