Emergency Physicians In Patients Research Articles

The use and misuse of the Dix-Hallpike test in the emergency department

A simple bedside test, the Dix-Hallpike test (DHT), can reliably diagnose benign paroxysmal positional vertigo (BPPV) in patients with acute onset dizziness or vertigo. We evaluated patterns of DHT use by emergency physicians in patients presenting with dizziness and vertigo. Our objective was to assess the frequency and clinically appropriate use of the DHT in an emergency department. A health records review was performed using data from patients who presented to a tertiary care emergency department between September 2014 and March 2018 with a primary complaint of vertigo or dizziness. Patient records were reviewed for documentation of symptoms consistent with BPPV and DHT usage. A total of 2309 patients met inclusion criteria. Of all dizzy patients who had complete documentation of signs and symptoms consistent with BPPV, 53% were assessed with a DHT. Of 469 patients who received a DHT, 134 (29%) of tests were done on patients who had documentation of at least one characteristic that was inconsistent with a diagnosis of BPPV. Eight patients who received a DHT were ultimately diagnosed with a central cause for their vertigo. The DHT is both underutilized and frequently applied to patients whose symptoms are not consistent with BPPV. This may result in prolonged patient discomfort and increased resource utilization, as well as increasing the risk of misdiagnosing central vertigo.

Effectiveness of Modified HEART Score in Predicting Major Adverse Cardiac Events.

The most important problem for emergency physicians in patients presenting with chest pain is deciding whether to discharge the patient or not. Therefore, many scoring systems have been developed to help with this decision making process. We aim to achieve a modified HEART value by combining the VAS value with the HEART score. Data were collected on age, sex, duration of the symptoms, pain severity using a 10-point visual analog scale (VAS), and the presence of a major adverse cardiac event (MACE). The HEART score was calculated and modified (mHEART) by adding 1 point to the total HEART score for a VAS score of ≥7. During the study period, 4781 patients were admitted, and 293 participants were analyzed. Of the patients, 34(11.6%) experienced MACE within a month after the encounter. The mean VAS scores were 5.65±1.44. However, 77(26.3%) patients had VAS scores ≥7. Taking 3 as the threshold, 42(14.3%) patients had HEART scores of 4 and above, where 47(16.0%) had mHEART scores ≥4. The mHEART scoring demonstrated better test indicators than the HEART score. According to the HEART score, 6(2.3%) of the 251 patients predicted as negative would develop MACE, but this number decreased to 1(0.4%) in 246 using the mHEART score. Although the HEART score performs reasonably well in discriminating patients who are MACE negative, it is possible to further improve the score by adding the VAS item. After validation by other studies, we would suggest modifying the HEART score by including the VAS item.

The effect of peer influence on the use of CT by emergency physicians for patients with headaches

BackgroundIt is challenging for emergency physicians (EPs) to distinguish between patients with life-threatening and benign headaches. We examined the effect of peer influence on computed tomography use by EPs for patients with headache and evaluated the peer influence effect in EPs with different levels of risk tolerance. MethodsWe conducted a before- and after-retrospective case review, and administered the Risk-Taking subscale of the Jackson Personality Index to attending physicians. Each EP computed tomography (CT) use rate, patient number, and CT use, were e-mailed every two months to enhance EP team norm and establish a trend in behavior. ResultsOf the 665 (before intervention) and 669 (after intervention) patients with headache, 206 (31%) and 171 (25.6%) underwent brain CT scans, respectively. Decreased use of CT examination was found in the post-intervention group (OR = 0.758, 95% CI: 0.593–0.967), especially for most risk-tolerant physicians (OR = 0.530, 95% CI: 0.311–0.889). There was prolonged ED length of stay (LOS) in the pre-intervention group (OR = 51.52, 95% CI: 26.998–76.050). ConclusionsWe observed that peer influence is an effective way to improve CT use rate and emergency department LOS for patients with isolated headache, especially for most risk-tolerant physicians. These findings could enhance the development of appropriate guidelines to assist ED physicians' CT use.

The Accuracy of Point-of-Care Ultrasound in Detecting Small Bowel Obstruction in Emergency Department.

Radiological imaging plays an essential role in the evaluation of a patient with suspected small bowel obstruction (SBO). In a few studies, point-of-care ultrasound (POCUS) has been utilized as a primary imaging modality in patients with suspected SBO. POCUS has been shown to be an accurate tool in the diagnosis of SBO with multiple research studies noting a consistent high sensitivity with a range of 94–100% and specificity of 81–100%. Specific sonographic findings that increase the likelihood of SBO include dilatation of small bowel loops > 25 mm, altered intestinal peristalsis, increased thickness of the bowel wall, and intraperitoneal fluid accumulation. Studies also reported that emergency physicians could apply this technique with limited and short-term ultrasound training. In this article, we aim to review the sensitivity and specificity of ultrasound examinations performed by emergency physicians in patients with suspected SBO.

LO029: Undetected serious medical illness in mental health patients seen in an academic emergency department

Introduction: Mental health concerns make up 5-10% of all adult presentations to Canadian emergency departments (ED). One challenge for the emergency physician (EP) is determining if a patient with a mental health concern has concomitant underlying medical illness. We defined “serious medical illness” (SMI) as a pathological condition that requires inpatient treatment on a medical or surgical ward. SMI undetected by emergency physicians in patients presenting with mental health concerns may result in adverse patient outcomes. The aim of this study was to determine the prevalence, timing, and etiology of undetected SMI in the ED among adult patients presenting with mental health concerns. Methods: A retrospective chart review was performed on all patients age 18 and older who presented to the ED at Victoria Hospital, London Health Sciences Centre between October 1, 2014 and April 30, 2015, who were subsequently referred to psychiatry by the EP. The primary outcome was the number of patients transferred to a medicine or surgery inpatient unit for treatment of their SMI within seven days of psychiatry admission from the ED. Results: 1,255 patients were referred to psychiatry during the study period. 803 patients were admitted and 452 were discharged. Of the admitted patients, 14/803 patients (1.7%) met our primary outcome. The mean age of patients in the SMI group (n=14) was 64 years. The mean age in the non-SMI group (n=1,241) was 38. In the SMI group, 3/14 patients died, 2/14 patients required an ICU admission, and 2/14 patients underwent a surgery for their missed SMI. The average length of psychiatry admission prior to transfer was 3.7 days. The average length of medical/surgical admission after transfer from psychiatry was 8.3 days. Undetected diagnoses included NSTEMI, serotonin syndrome, lithium toxicity, thoracic aortic aneurysm, gastrointestinal stromal tumour, forearm abscess, Parkinsonian crisis, and others. Conclusion: This chart review demonstrated a 1.7% rate of undetected serious medical illness in patients who presented to the ED with mental health concerns. Adverse outcomes included death, ICU admissions, and surgeries. This rate is similar to other studies on the topic. The SMI group tended to be older than the non-SMI group. This research may have implications on the appropriate workup and disposition of elderly patients presenting to the ED with mental health concerns.

EPA-1321 - Panic symptoms in patients with non-cardiac chest pain in the emergency department: a blind spot for emergency phycisians

Introduction Non-cardiac chest pain (NCCP) is a common diagnosis among patients visiting an emergency department. 50–90% of patients presenting with chest pain are diagnosed with non-cardiac chest pain. One of the possible causes of NCCP is a psychiatric illness. Previous studies found high prevalence of panic disorder (25%-40%) using structured DSM-IV interviews. Objectives We wanted to review the occurrence of patients with a possible panic disorder in our emergency department. In case of high occurrence further interventions could be warranted. Aims To examine the frequency of panic disorder diagnosis by emergency physicians in patients with NCCP. Methods Electronic health records from all patients in the OLVG hospital presenting with cardiac pain at the emergency department with in January 2013 were reviewed in a retrospective cohort study. We substracted the final diagnosis by the emergency physician Results In this month 195 patients presented at the emergency department with chest pain. 121 (62%) suffered from non-cardiac chest pain. They were discharged with the following diagnosis: 13 (11%) pulmonal disease, 23 (19%) a musculoskeletal problem, 13 (11%) a gastro-intestinal diagnosis, 4 (3%) drug related, 63 (56%) were described as suffering from atypical chest pain. Only in 5 (4%) a psychologic cause was described as primary diagnosis. Conclusions We found a low rate of psychiatric diagnosis by emergency physicians in patients with NCCP compared to previous studies using structured interviews. Interventions are needed to improve the detection of psychiatric symptoms in our emergency department.

Anesthesia Literature Review

Anesthesia Literature Review

Effective Antibiotic Treatment Prescribed by Emergency Physicians in Patients Admitted to the Intensive Care Unit with Severe Sepsis or Septic Shock: Where is the Gap?

Background Antibiotic selection made within the first hour of recognition of severe sepsis and septic shock has been shown to decrease mortality. Objective The purpose of this study was to determine what antibiotics are being prescribed and to identify factors influencing ineffective antibiotic coverage in patients with severe sepsis or septic shock. In addition, we explore an alternative method for antibiotic selection that could improve organism coverage. Methods This was a retrospective review of emergency department (ED) patients admitted to an intensive care unit (ICU) over a 12-month period with a culture-positive diagnosis of either severe sepsis or septic shock. Appropriate antibiotic therapy was defined as effective coverage of the offending organism based on final culture results. Results Of the 1400 patients admitted to the ICU, 137 patients were culture positive and met the criteria for severe sepsis or septic shock. Effective antibiotic coverage was prescribed by emergency physicians in 82% (95% confidence interval [CI] .74–.88) of cases. Of the 25 patients who received ineffective antibiotics, the majority had infections caused by resistant Gram-negative organisms. Health care-associated pneumonia guidelines were applied to all patients, regardless of the source of infection, and were 100% sensitive (95% CI .93–1) for selecting patients who had infections caused by highly resistant organisms. Conclusion Emergency physicians achieved 82% effective antibiotic coverage in patients with severe sepsis or septic shock. The gap seems to be in coverage of highly resistant Gram-negative organisms. An alternative approach to antibiotic prescription, utilizing a set of guidelines for community- and health care-associated infections, was found to be 100% sensitive in selecting patients who had infections caused by the more resistant organisms.

366: Clinical Experience of Continuous Renal Replacement Therapy as an Extracorporeal Elimination Performed by Emergency Physicians in Patients With Poisoning

366: Clinical Experience of Continuous Renal Replacement Therapy as an Extracorporeal Elimination Performed by Emergency Physicians in Patients With Poisoning

Emergency Department Activation of an Interventional Cardiology Team Reduces Door-to-Balloon Times in ST-Segment-Elevation Myocardial Infarction

American Heart Association/American College of Cardiology guidelines recommend door-to-balloon times of fewer than 90 minutes in patients with acute ST-segment-elevation myocardial infarction. We hypothesized that immediate activation of an interventional cardiology team (code H) would reduce the time to percutaneous coronary intervention by 1 hour and increase the proportion of patients undergoing percutaneous coronary intervention within 90 minutes of arrival. Study design was a before-and-after trial in an academic suburban emergency department (ED) with a certified cardiac catheterization laboratory. Subjects were a consecutive sample of patients presenting to the ED with ST-segment-elevation myocardial infarction evident on the initial ECG. Patients without chest pain and refusing catheterization were excluded. The intervention was the use of a central paging system for activation of the interventional cardiology team (attending physician, fellow, nurse, technician) by emergency physicians in patients presenting to the ED with ST-segment-elevation myocardial infarction. Measures were demographic and clinical information collected with standardized data collection forms. Outcomes were door-to-balloon times and the proportion of patients undergoing percutaneous coronary intervention within 90 minutes of arrival. Groups were compared with chi2 and t tests. There were 97 patients included in the study; 43 were treated in the 2 years before implementation of the code H and 54 patients were treated the subsequent 2 years. Mean age (SD) was 56.9 years (13.7), 27% were women, and 86% were white. Groups were similar in age, sex, and race. Implementation of a code H reduced the median door-to-balloon time by 68 minutes (from 176 to 108 minutes; P<.001) and increased the proportion of patients undergoing percutaneous coronary intervention within 90 minutes from 2.8% to 29.0% (mean difference 26.5; 95% confidence interval 15.0 to 36.9). To determine whether further improvements occurred, 48 patients treated in 2006 showed a 20-minute further reduction in door-to-balloon time; 52% underwent angioplasty within 90 minutes of ED presentation. Institutional implementation of a protocol that requires emergency physicians to activate an interventional cardiology team response in ED patients with ST-segment-elevation myocardial infarction reduces the door-to-balloon time and increases the proportion of patients undergoing percutaneous coronary intervention within 90 minutes.

Prospective validation of a current algorithm including bedside US performed by emergency physicians for patients with acute flank pain suspected for renal colic

Objective: The purpose of this study was to validate an algorithm recommended by current literature for the patients with acute flank pain and evaluate the validity of bedside ultrasonography (US)...

Feasibility and Accuracy of Emergency Echocardiography (ECHO) Performed by Emergency Physicians in Patients with Acute Dyspnea

Feasibility and Accuracy of Emergency Echocardiography (ECHO) Performed by Emergency Physicians in Patients with Acute Dyspnea

Prospective validation of a current algorithm including bedside US performed by emergency physicians for patients with acute flank pain suspected renal colic

Objective: The purpose of this study was to validate an algorithm recommended by current literature for the patients with acute flank pain and evaluate the validity of bedside ultrasonography (US) performed by emergency physicians (EP) as a part of this algorithm. Materials and methods: This prospective validation study was carried out over a 5 month period in a tertiary care hospital adult emergency department (ED) with annual attendance of 55 000. Adult patients presenting to the ED with unilateral acute flank pain during the study period were enrolled into the study consecutively. Oral consent was obtained after the protocol was briefly explained to the patient and before the administration of analgesia. A protocol form was recorded for each patient enrolled into the study, and patients were followed up under the guidance of a previously designated algorithm in the ED. Data were analysed with SPSS software. The x test was used to compare the dichotomised data of patients, diagnosed with and without stones, and to select the significant parameters to be used in the logistic regression. Results: Of the 227 patients enrolled, 176 were proven to have urinary tract stones. There were 122 patients discharged from ED without further investigation except urinalysis and bedside US. Of these 122 directly discharged patients, 99 had a urinary stone, and the others did not have a life threatening disorder. Four of the 227 patients were admitted to the hospital. The remaining 51 patients did not have stones detected, and their pain subsided. Having a previous history of stones, radiation of pain to the groin, accompanying nausea, and detection of pelvicalyceal dilatation using bedside US performed by the EPs were found to be the most significant parameters in determining urinary stones in logistic regression analysis. Sensitivity and specificity of these parameters were: previous history of stones 59% and 66%, radiating pain to the groin 68% and 49%, nausea 71% and 51%, and detection of pelvicalyceal dilatation by bedside US 81% and 37%. Conclusion: Bedside US performed by EPs could be used safely in the evaluation of patients with acute flank pain as a part of a clinical algorithm. Previous history of urinary stones, radiation of pain to the groin, accompanying nausea. and detection of pelvicalyceal dilatation are major parameters and symptoms of urinary stone disease, and could be used in the algorithms.

Ultrasonography by Emergency Physicians in patients with suspected Cholecystitis

This article investigates the use of bedside abdominal ultrasonography (BAU) performed by emergency physicians (EPs) to screen patients for cholelithiasis and cholecystitis. In this prospective study EPs performed BAU on 116 patients. Agreement between BAU and formal abdominal ultrasound (FUS) performed in the radiology department for detecting cholelithiasis and cholecystitis was determined using Kappa statistics. Test characteristics of BAU for detecting cholelithiasis and acute cholecystitis were calculated. Agreement between BAU and FUS was 0.71 for cholelithiasis and 0.46 for acute cholecystitis. Test characteristics of BAU for cholelithiasis were sensitivity 92%, specificity 78%, positive predictive value (PPV) 86%, negative predictive value (NPV) 88%. Test characteristics of BAU for acute cholecystitis compared with clinical follow-up were sensitivity 91%, specificity 66%, PPV 70%, NPV 90%. BAU may be used to exclude cholelithiasis and is sensitive for cholecystitis. However, when EPs with limited experience identify cholecystitis a confirmatory test is warranted before cholecystectomy.

Ultrasound availability in the evaluation of ectopic pregnancy in the ED: Comparison of quality and cost-effectiveness with different approaches

The liberal use of ultrasonography has been advocated in patients with first trimester cramping or bleeding to avoid misdiagnosis of ectopic pregnancy in the emergency department (ED). The cost-effectiveness of different approaches to ultrasound availability has not been previously reported. In this study, we investigated measures of quality and cost-effectiveness in detecting ectopic pregnancy in the ED over a 6-year period, divided into three approximately equal epochs with three distinct approaches to ultrasound availability. The study retrospectively identified 120 cases of ectopic pregnancy seen in the ED over 6 years. There was significant improvement in the percentage of patients with ectopic pregnancy who were documented to have absence of intrauterine pregnancy (IUP) at the first visit from 76% during Epoch 1, when there was limited availability of ultrasound through medical imaging (MI Sono), to 88% in Epoch 2, when MI Sono was readily available, to 96% in Epoch 3, when both MI Sono and ultrasound by emergency physicians (ED Sono) were readily available ( P = .02). The estimated number of MI Sonos ordered by emergency physicians in patients at risk for ectopic pregnancy increased from 5.2 per ectopic pregnancy in Epoch 1 to 11.8 per ectopic pregnancy in Epoch 2, and declined to 5.5 per ectopic pregnancy in Epoch 3, when 19.9 ED Sonos per ectopic pregnancy were also done. The cost of ED Sono in Epoch 3 was more than offset by savings from avoiding calling in ultrasound technicians after regular medical imaging department hours. The specificity of ED Sono in ruling in an IUP was 100% (95% CI 98.3 to 100%), but analysis of secondary quality indicators reflecting times from first ED visit to treatment in Epoch 3 raised the possibility that an adnexal mass or signs of tubal rupture may have been missed on some ED Sonos. We conclude that increased availability of ultrasonography leads to improved quality in the detection of ectopic pregnancy in the ED, but at the expense of a disproportionate increase in the number of ultrasound studies done per ectopic pregnancy detected. Our study suggests that the most cost-effective strategy is for emergency physicians to screen all patients with first trimester cramping and bleeding with ED Sonos, and to obtain MI Sonos at the time of the initial ED visit in all cases in which the ED Sono is indeterminate or shows no IUP. (Am J Emerg Med 2000;18:408-417.

Intravenous beta-blockers in acute myocardial infarction: Perceived versus actual use by cardiologists and emergency physicians

This study sought to determine the relationship between perceived and actual use of intravenous β-blockers by cardiologists and emergency physicians for patients with acute myocardial infarction (AMI). The charts of 35 patients who presented to the emergency department of a community hospital with AMI during a 6-month period were retrospectively reviewed. Members of the departments of cardiology and emergency medicine were mailed a one-page survey pertaining to their use of intravenous β-blockers in AMI. Of the 35 patients only 4 (11%) received an intravenous β-blocker. Three of these 4 patients were either hypertensive or tachycardic and none had a contraindication to β-blockade. A contraindication was present in 15 (48%) of those who did not get intravenous β-blockade. The survey was completed by 11 (100%) of the emergency physicians and 68 (69%) of the cardiologists. Emergency physicians were significantly less likely to report using intravenous β-blockers in AMI patients who were normotensive with normal heart rates ( P = .007) and most (9 of 11) deferred the decision to the cardiologist. Although the majority of cardiologists reported giving an intravenous β-blocker to at least 50% of AMI patients with normal blood pressure and pulse rates, the actual frequency was only 8% (1 of 13). In this institution, cardiologists overestimated the frequency of intravenous β-blocker administration to patients with AMI. Emergency physicians usually deferred the decision on intravenous β-blockers to cardiologists and reported a frequency of use that was much closer to actual practice.

Ultrasonography by emergency physicians in patients with suspected ureteral colic

We performed a prospective study of patients with suspected ureteral colic to evaluate the test characteristics of bedside renal ultrasonography (US) performed by emergency physicians (EPs) for detecting hydronephrosis, and to evaluate how US can be used to predict the likelihood of nephrolithiasis. Thirteen EPs performed US, recorded the presence of hydronephrosis, and made an assessment of the likelihood of nephrolithiasis. All patients underwent i.v. pyelography (IVP) or unenhanced helical computed tomography (CT). There were 126 patients in the study: 84 underwent IVP; 42 underwent helical CT. Test characteristics of bedside US for detecting hydronephrosis were: sensitivity 72%, specificity 73%, positive predictive value (PPV) 85%, negative predictive value (NPV) 54%, accuracy 72%. The PPV and NPV for the ability of the EP to predict nephrolithiasis after performing US were 86% and 75%, respectively. We conclude that bedside US performed by EPs may be used to detect hydronephrosis and help predict the presence of nephrolithiasis.

Performance and interpretation of pelvic ultrasound by emergency physicians in patients with suspected ectopic pregnancy: A prospective study

Performance and interpretation of pelvic ultrasound by emergency physicians in patients with suspected ectopic pregnancy: A prospective study