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Logo of canrespjCanadian Respiratory Journal
Can Respir J. 2010 Jan-Feb; 17(1): 13–14.
PMCID: PMC2866205

Asthma in the emergency room in Canada

In the current issue of the Canadian Respiratory Journal, Rowe et al (pages 25–30 [1]) report the results of a prospective study of an experience with 695 adult asthmatic patients in emergency rooms (ERs) of 20 hospitals across Canada. This study is noteworthy simply because it was completed – it was a ‘Herculean’ task.

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Nick R Anthonisen

In brief, asthmatic patients who presented to ERs were enrolled after giving informed consent and completing standardized questionnaires. Their course in the ER as well as a follow-up telephone contact was documented. Patients who were admitted as a result of their ER visit were compared with those who were not. There were, of course, problems in patient selection because the research team was not available at all times or was not called by the ER physicians, and some patients were too sick to be stabilized enough to give consent, while others were initially believed to have asthma but also had other problems such as pneumonia or chronic obstructive pulmonary disease. Indeed, the 695 patients studied were a subset of approximately 1600 asthma patients seen in participating ERs. While one could whine about the study not being entirely representative, it is difficult to imagine how things could have been improved in a real-world setting.

Of the 695 patients, 13% were admitted to hospital. If it is assumed that patients who were not stabilized were all admitted, this fraction increased to approximately 18%.

The vast majority of patients were, at least initially, treated successfully. Rowe et al (1) point out that their admission rate was lower than that reported by others in similar studies; however, they wisely refrained from interpreting this to be important because admission rates varied within their study, and it is unlikely that all such studies examine the same type of patients. Approximately one-half of the patients with severe disease (according to a widely accepted acuity scale [2]) were admitted; approximately one-half were not. As one would expect, patients who were admitted were sicker at presentation than those who were not as ill; they were slightly older, more likely to be smokers, had lower oxygen saturations and were on more therapy, especially beta-agonists and oral corticosteroids. They also had longer ER stays than patients who were discharged.

Several ‘glitches’ in asthma care appeared to emerge from the study. Almost one-third of the patients did not receive bronchodilators during the first hour of their visit; one hopes this figure was at least partially due to poor record keeping as opposed to neglect. Inhaled steroids were underused before the ER visit: 30% of admitted patients and 40% of those not admitted had not been receiving them – if someone has the potential to need emergency care, he or she should be taking these medications. The length of the ER stay for admitted patients averaged nearly 11 h, which seems too long; it must have been clear that these patients would have needed admission well before 11 h had elapsed; this fact may have reflected bed shortages. The follow-up telephone call two weeks after the ER visit revealed that only one-third of patients had seen their primary care provider during the interval, which is probably bad medicine. Some 15% of the patients were seen again in the ER within the first two weeks and some were admitted. The obvious and unsurprising conclusion is that best practices are, by no means, universally applied, in spite of well-publicized guidelines. Exactly how much improvement would occur if they had been universally applied is unknown – humans are imperfect and will remain so.

Thus, the study conducted by Rowe et al was descriptive and had substantial power in documenting what actually exists as opposed to what should exist; studies similar to this one should be encouraged. It is worth noting that this group has been very productive (3,4), indicating great energy and dedication.


1. Rowe BH, Villa-Roel C, Abu-Laban RB, et al. Admissions to Canadian hospitals for acute asthma: A prospective, multicentre study. Can Respir J. 2010;17:25–30. [PMC free article] [PubMed]
2. Beveridge R. The Canadian Triage and Acuity Scale: A new and critical element in health care reform. J Emerg Med. 1998;16:507–11. [PubMed]
3. Rowe BH, Bopta GW, Clark S, Camargo CA, Jr, on behalf the MARC Investigators Comparison of Canadian versus America emergency department visits for acute asthma. Can Respir J. 2007;14:331–7. [PMC free article] [PubMed]
4. Rowe BH, Villa-Roel C, Sivilotti M, et al. Relapse following emergency department discharge for acute asthma: A prospective multi-center study. Acad Emerg Med. 2008;15:709–17. [PubMed]

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