DIAGNOSIS OF SIMPLE POSTERIOR HIP DISLOCATION: OBTURATOR OBLIQUE RADIOGRAPHIC VIEWS EXCLUDE THE NEED FOR CT SCAN

Abstract

The purpose of the study was to assess the accuracy of prereduction and postreduction obturator oblique radiographic views in the diagnosis of simple posterior hip dislocation, and to ascertain whether, in differentiating simple posterior hip dislocations from fracture dislocation, obturator oblique views are a safe diagnostic tool in the hands of junior registrars, trauma officers and community service doctors.

A sample group of prereduction and postreduction radiographs of patients who had sustained posterior hip dislocations (Thompson and Epstein type I to III) was collected. All patients then had CT scans of the hip to confirm the plain radiographic findings.

Shown only the radiographs, all junior doctors involved in the study correctly differentiated between simple posterior hip dislocations and fracture dislocations.

This has implications for savings in both time and money. If CT scans are unnecessary in simple posterior hip dislocation, the need for transfer and tertiary level hospitalisation is obviated.