New Data Measure Risks with Oral Corticosteroids

Key point: Remember—all medications have risks!

Citation: Waljee AK, Rogers MA, Lin P, et al. Short term use of oral corticosteroids and related harms among adults in the United States: population based cohort study. BMJ. 2017;357:j1415.

This cohort study looks at patients with short-term steroid use (<30 days) and potential complications at 30 and 90 days out. Endpoints included fracture, sepsis, and blood clot. This study included 1.5 million patients 18-64 years of age. Over 1/3 used steroids in a 3-year period. The incidence of the endpoints was at least double for all three events. Study weaknesses include retrospective nature and lack of ability to randomize. For urgent care providers, the most important take away is that no medication is benign, and risks must be balanced with advantages of treatment.

Taking Aim at Inappropriate Antibiotic Use in Children

Key point: Use of a standard protocol for urine culture follow-up and discontinuation of unnecessary empiric antibiotics was both effective and safe in a high-volume pediatric care network.

Citation: Saha D, Patel J, Buckingham D, et al. Urine culture follow-up and antimicrobial stewardship in a pediatric urgency care network. Pediatrics. March 16, 2017. [Epub ahead of print]

This quality improvement study’s objective was to improve follow-up management of negative urine culture results in urgent care centers to reduce inappropriate antibiotic exposure in children. Using a multidisciplinary task force, the authors created and implemented a protocol for routine nurse and clinician follow-up of urine culture results, discontinuation of unnecessary antibiotics, and documentation in the medical record. The authors followed 910 patients who received empiric antibiotic therapy for UTIs but had negative urine culture results. Using the protocol the antibiotic, discontinuation rate increased from 4% to 84%, avoiding 3,429 (40%) of 8,648 antibiotic days prescribed. Of those patients who discontinued antibiotics, none was diagnosed with a UTI within 14 days of the initial urgent care encounter. The use of urine culture follow-up management has immediate potential to improve antibiotic stewardship in the urgent care setting, with minimal burden on staff and clinician operational efficiency.

Faster Spontaneous Voiding for Clean-Catch Urine in Infants

Key point: Gentle suprapubic cutaneous stimulation with gauze soaked in cold fluid (the Quick-Wee method) was shown to increase the rate of spontaneous voiding in infants requiring a clean catch urine sample.

Citation: Kaufman J, Fitzpatrick P, Tosif S, et al. Faster clean catch urine collection (Quick-Wee method) from infants: randomised controlled trial. BMJ 2017;357:j1341.

This randomized controlled trial of 374 Australian infants 1-12 months of age was undertaken to determine if a simple stimulation technique would increase the rate of spontaneous voiding for a clean-catch urine within 5 minutes. Infants were randomized either to gentle stimulation using gentle suprapubic stimulation with gauze soaked in cold fluid (the Quick-Wee method) or standard clean-catch urine collection with no stimulation. The Quick-Wee method resulted in a higher rate of successful urine sample collection (30%) than standard urine collection (9%). There was no statistical difference in contamination rates between the two methods, and both parents and clinicians reported greater satisfaction with the Quick-Wee method. Of note for U.S. urgent care clinicians, and in contrast to the current UK guidelines, the American Academy of Pediatrics guidelines for urine collection only recommend noninvasive urine samples for screening purposes. Invasive catheterization or suprapubic aspiration samples are required by the AAP guidelines for definitive diagnosis prior to starting antibiotic therapy.

Some Studies Find Improvement and Low Risk in Manipulation for Back Pain

Key point: Modest benefit with spinal manipulation for low back pain noted.

Citation: Paige NM, Miake-Lye IM, Booth MS, et al. Association of spinal manipulative therapy with clinical benefit and harm for acute low back pain: systematic review and meta-analysis. JAMA. 2017;317(14):1451-1460.

This systematic review looks at spinal manipulation as a treatment for low back pain. The main outcome assessed was pain, with an attempt to look for potential harm. There was improvement noted in some but not all studies. Heterogeneity of results not explainable by variables present further confused this review. No serious long-term adverse events were reported. For the urgent care provider, this is one more modality that may benefit and is unlikely to cause significant harm. Patients should understand it is not a perfect answer, but one possible treatment.

Prescribe Steroids Judiciously

Key point: Another steroid use question, but an indirect study.

Citation: Farber HJ, Silveira EA, Vicere DR, et al. Oral corticosteroid prescribing for children with asthma in a Medicaid managed care program. Pediatrics. 2017;139(5):e20164146.

This study attempts to determine appropriateness of oral steroid treatment for patients with asthma. Claims data from Texas Children’s Health Plan was reviewed for steroid use and other signs, such as poorly controlled asthma, inhaler use, emergency room visits, or hospitalizations. Based on their review, significant steroid overuse may be present. They divided use into four groups; despite differences in use, outcomes were likely similar. Unfortunately, the data used in this study were not a direct chart review but rather assumptions based on claims data. From the acute care provider’s perspective, the only definite message is to be aware that there is a concern for overprescription and, understanding all treatment has risk, be sure to prescribe judiciously.

Ruling Out AMI with a Single Cardiac Troponin Enzyme Sample is Risky

Key point: A single hs-cTnT concentration level below the limit of detection, in combination with a normal ECG, may successfully rule out AMI in patients presenting to the ED with possible acute coronary syndrome. However, data do not yet support this approach when the troponin level is drawn within 3 hours of symptom onset.

Citation: Pickering JW, Than MP, Cullen L, et al. Rapid rule-out of acute myocardial infarction with a single high-sensitivity cardiac troponin t measurement below the limit of detection: a collaborative meta-analysis. Ann Intern Med. April 18, 2017. [Epub ahead of print]

This article details a systemic review of recent prospective studies of patients presenting to EDs with symptoms suggestive of possible acute coronary syndrome who also had an ECG and a high-sensitivity cardiac troponin test (hs-cTnT) performed. The use of hs-cTnT levels has been shown in prior studies to reliably detect very low concentrations of troponin T. The authors hypothesized that an hs-cTnT below the threshold of detection combined with a normal ECG may reliably rule out AMI patients presenting to the ED with chest pain. Results indicated that patients with hs-cTnT levels below the limit of detection who also presented with a normal ECG had a very low risk for AMI or serious adverse cardiac events within 30 days. The sensitivity point approached 99%. However, patients with AMI who present very early after symptom onset may not have detectable troponin levels in the bloodstream. In fact, this study revealed that 50% of patients who were determined to have false negative results had their initial troponin level drawn within 3 hours of symptom onset. For this reason, the authors reiterate current guidelines that a single hs-cTnT level drawn within 3 hours of symptom onset is insufficient to reliably exclude patients with AMI. Urgent care clinicians should continue to use caution when attempting to “rule out” AMI with a single cardiac troponin enzyme sample, especially if it is not a high sensitivity assay.

No Increased Arrhythmia Risk with Azithromycin vs Amoxicillin

Key point: Azithromycin use was associated with an increased risk of ventricular arrhythmia when compared with nonuse of antibiotics but not did not increase risk of arrhythmias when compared with amoxicillin use.

Citation: Trifirò G, de Ridder M, Sultana J, et al. Use of azithromycin and risk of ventricular arrhythmia. CMAJ. 2017;18;189:E560-568.

This retrospective nested case-control study captured over 14 million new outpatient antibiotic users (no antibiotic use within the prior year) aged 85 or younger over a 13-year period. They identified 12,874 (0.1%) users that developed a ventricular arrhythmia during the study period. Of those, 30 developed a ventricular arrhythmia while concurrently taking azithromycin. These 30 patients were compared to up to 100 control patients of the same age, sex, index date and database. Results revealed that compared with nonuse of antibiotics, the current use of azithromycin was associated with an increased risk of ventricular arrhythmias (OR 1.97, 95% CI 1.35-2.86). However, when comparing current use of azithromycin to current use of amoxicillin, there was no increase in risk of arrhythmias. The authors speculate that confounding by indication likely played a major role in the assessment of the association between current azithromycin use and ventricular arrhythmias because the increased risk disappeared when current amoxicillin use was used as the comparator. Confounding by indication refers to the increased baseline risk of ventricular arrhythmias associated with the indication of the antibiotic use (ie, the infection) rather than the exposure itself (ie, azithromycin). Caution is suggested in interpreting these results, as this study’s findings conflict with several previous studies of potential azithromycin arrhythmic effects.

Consider Your Options Before Prescribing Steroids for Sore Throat

Key point: Steroids Are of Little Benefit in Sore Throat

Citation: Hayward GN, Hay AD, Moore MV, et al. Effect of oral dexamethasone without immediate antibiotics vs placebo on acute sore throat in adults: a randomized clinical trial. JAMA. 2017;317(15):1535-1543.

In this placebo-controlled, randomized, double-blind trial the use of steroids in the form of a single dexamethasone dose was compared with placebo for patients with sore throat who were not in need of antibiotics. A total of 565 patients were eligible for the study. Of these, 288 received dexamethasone 10 mg. Symptoms were similar at 24 hours and slightly better for the patients in the treatment group at 48 hours (35% vs 27%). The authors labeled this is a significant difference. From the perspective of an urgent care provider, and considering the other studies reviewed in this abstract section, an 8% improvement in symptom resolution does not seem to be worth the risk of steroids. At the minimum, a thorough discussion of risks and benefits should be undertaken if the decision is made to prescribed steroids.

Sean M. McNeeley, MD and Glenn Harnett, MD

Abstracts in Urgent Care – June 2017

Glenn Harnett, MD

Principal for No Resistance Consulting Group, Trustee at UCA Urgent Care Foundation, Editorial Board Member at The Journal of Urgent Care Medicine
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