Free Health Dissertations - On The Direct Issue Of The Red Dot System, An Almost Immediate Precursor To
On the direct issue of the red dot system, an almost immediate precursor to the system was reported in the BMJ in 1991 by Renwick et al. . He discussed a system that was tried out of getting radiologists to indicate their diagnoses on the pre-reported X-Rays, in order to guide the casualty officers in their decisions. The conclusions of the study were that, because of the high rate of false positive reporting (7%) and higher rate of false negatives (14%) it was appropriate for radiologists to offer useful advice but to take no more responsibility than that. We shall discuss the issues of false positives and false negatives further on in this piece and clearly they are an inherent problem with the system. It follows that we should, perhaps, address the reasons why there are these discrepancies and use them as a learning exercise to try to reduce the gap.
In the excellent and concise article written by Touquet et al. (1995) the authors address the Ten Commandments of A&E Department radiology. They discuss the red dot system in the following terms.
Inexperienced doctors will inevitably come across injuries that they have never seen before. In these cases it may not be possible to make a diagnosis but you will notice that the films do not look quite right. Good examples of this are lunate and perilunate dislocations of the hand. It is important to seek senior advice and also to listen to the radiographer. Many departments operate a "red dot" system, in which the radiographer flags up an abnormality. An experienced radiographer may be as good as or even better than a junior doctor at interpreting films.
The problem with this system is that the absence of a red dot does not necessary mean that there is no abnormality. This is important to remember because the final responsibility lies with the doctor, and not the radiographer. Therefore never accept poor quality or inadequate films.
The most salient point of this article is in the last paragraph. The absence of a red dot does not mean the absence of an abnormality and the liability lies with the doctor not the radiographer. This is clearly proper, as any experienced healthcare professional will state, any investigation (particularly an X-Ray) is only an adjunct to diagnosis, it is the person who is clinically in charge of the patient who has to assimilate all the available evidence to make a diagnosis. The radiographer has not seen the patient to examine, and certainly will not have to hand all of the other potential diagnostic aids that are available in a modern A&E Department.
