Glasgow Coma Scale (GCS) was introduced in 1974 as a tool to standardize the assessment of the level of consciousness of patients.\nSince it was introduced and used, GCS was considered to be the gold standard method for this purpose. Despite plenty of strengths GCS\nhas (i.e. objectivity and easy communication on the results between the health care providers); GCS was considered to be ambiguous and\nconfusing for nurses and infrequent users. Moreover, lack of knowledge and training about GCS might affect the accuracy and inter-rater\nreliability among health care professionals. The purpose of this paper was to simplify the use of GCS step by step for the beginner health\ncare professionals.\nThis literature review was done by searching the following search engines: Pubmed, Midline, CINHAL, Ebsco host, and Google Scholar\nfor the key words of: Glasgow Coma Scale (GCS), flow chart, nurses, and consciousness.Types of articles included: original research,\nliterature review and meta-analysis. This review included the following sections:\n1) Definition of the related concepts\n2) The historical development of the GCS\n3) How to score the GCS\n4) Recommendation for clinical settings, and\n5) Conclusion
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