Joel M. Bartfield

Creating a learning environment to produce competent residents: the roles of culture and context.

Six core competencies have been developed for use by residency programs in assessing individual resident training outcomes. The authors propose that it is important to consider the role of residency culture and work context in helping residents achieve the required competencies. Specifically, the development of a learning-oriented culture and favorable work conditions that facilitate the presence of that culture should be a high priority for residency programs and the organizations (e.g., hospitals) in which they are housed. This places formal accountability at the doorstep of these programs and organizations in helping to create a “competent” resident. Using ideas from management theory, the authors identify specific attitudes, behaviors, and interactions that define a learning culture and show their usefulness when applied to residents’ achievement of the competencies. They assert that current features of everyday resident work life decrease the chances that such attitudes, behaviors, and interactions will occur. Identifying and prioritizing the components of desired work environments for promoting a learning-oriented culture, in addition to assessing the presence or absence of both the components and learning best practices within residency programs, should become normal activities that complement the process of assessing competencies.

Buffered lidocaine as a local anesthetic: An investigation of shelf life

STUDY OBJECTIVE To determine whether buffered lidocaine must be prepared just before use. DESIGN Randomized, double-blind, prospective trial. SETTING University hospital. PARTICIPANTS Twenty-four adult volunteers. INTERVENTIONS Three buffered lidocaine solutions prepared seven days, one day, and just before use were compared with a control solution. Subjects received 0.5 mL intradermal injections of each solution. Pain of infiltration and extent and duration of anesthesia were measured. MEASUREMENTS AND MAIN RESULTS Pain of infiltration was less with all buffered solutions than control (P less than .0001). Mean maximum diameter of anesthesia ranged from 29 to 33 mm for the buffered solutions compared with 31 mm for control. Mean duration of anesthesia was 33 minutes for control and 30 minutes for all of the buffered solutions. There was no statistically significant difference in extent or duration of anesthesia for any of the solutions (P greater than .5, beta = .15 for delta = 10%). CONCLUSION Buffered lidocaine stays effective for up to one week after preparation. It is therefore convenient to use in emergency settings.

Physician and patient factors influencing the treatment of low back pain

&NA; Previous retrospective studies have suggested that patient demographics may influence analgesic administration. These studies have not taken physicians’ impression of patient pain into account. This prospective study investigates the influence of (i) physician impression of the degree of pain and (ii) patient demographics on the use of analgesic. A convenience sample of adults with non‐traumatic lower back pain was studied. Possible predictors of analgesic administration included physician pain scores (assessed by visual analogue scale), patient ethnicity, gender, age, and insurance. These variables were tested individually and then using logistic regression. For the total of 91 patients enrolled, only physician pain scale was found to be associated with analgesic use. Median scores were 68 mm (interquartile range=62–80 mm) for those receiving treatment versus 48 mm (interquartile range=30–58 mm) for those who did not (P<0.001). This study therefore suggests that physician impression of patient pain rather than patient demographics influences analgesic use.

Outcomes of anticoagulated trauma patients

Patients on warfarin are at high risk for potentially life-threatening hemorrhage even after relatively minor trauma. Outcomes of these patients and the potential complications of reversing the effects of anticoagulation have received little attention. This study was performed to determine the overall outcome of orally anticoagulated patients who sustained injury as well as to determine any untoward effects of reversing their anticoagulated states. A retrospective study of injured patients on warfarin was conducted on patients admitted to an urban, university, tertiary-referral, level I trauma center between 1/1/93 and 12/31/96. Surviving patients were followed for a period of at least 1 month. Injuries were grouped by anatomic site. Charts were reviewed for degree of anticoagulation on admission (ie, initial international normalized ratio [INR]), survival, adverse effects of reversal of anticoagulation, and reinstitution of warfarin therapy. Discharged patients were contacted at home for follow-up. Thirty-five consecutive patients, 18 men and 17 women, on warfarin therapy at the time of their injuries were reviewed. The mean age was 75 years, with a range of 39 to 96. The mean follow-up period was 12.7 months. Reasons for anticoagulation included atrial fibrillation, prosthetic heart valves, revascularized limb, hypercoagulable state, deep venous thrombosis, pulmonary embolism, phlebitis, and aortic stenosis. Mean admission INR was 3.2, with a range of 1.6 to 10.0. There were 8 in-hospital deaths. Intracranial hemorrhages accounted for the majority of injuries. Ten patients were not given reversal therapy. Four complications were attributable to reversal therapy (upper extremity hemiplegia, transient ischemic attack, deep venous thrombosis, arterial thrombosis). Twenty-one patients had their warfarin reinstituted. Follow-up of surviving patients ranged from 1.5 to 42 months. Patients on warfarin are at high risk for intracranial hemorrhage following trauma. Patients on warfarin may be reversed during the acute period following injury, but transient complications may arise. Further prospective studies need to be conducted to determine which anticoagulated trauma patients may not require reversal therapy.

Neonatal fever: Utility of the Rochester criteria in determining low risk for serious bacterial infections

The purpose of this study was to test the utility of the Rochester criteria in determining which febrile neonates are at low risk for serious bacterial infections (SBI). This was a retrospective study over a 5-year period of 134 patients younger than 29 days old with fever without a source evaluated in the emergency department. Results of urinalysis, lumbar puncture, peripheral white blood cell count, and cultures of blood, urine, cerebrospinal fluid, and stool were recorded. Of the 134 neonates, 71 were high-risk, 48 low-risk, and 15 were not classifiable by the available data. Nineteen of the 71 high-risk patients (26.8%) had SBI (2 patients had 2 SBI). Three of the 48 low-risk neonates (6.3%) had SBI (1 patient had 2 SBI). None of the 15 nonclassifiable patients had SBI. Employing the Rochester criteria to the fully cultured neonates who could be risk-stratified, the sensitivity, specificity, positive predictive value, and negative predictive value were 86.4%, 46.4%, 26.8%, and 93.8%, respectively. Although outpatient management of febrile neonates may be feasible, a small percentage of neonates meeting low-risk criteria will have a SBI.

Buffered versus plain lidocaine for digital nerve blocks

Study objectives: To test whether buffered lidocaine is less painful to administer as a digital nerve block than plain lidocaine. Design: Randomized, double-blind, prospective clinical trial. Setting: University hospital emergency department. Participants: Adults not allergic to lidocaine requiring a digital nerve block. Interventions: Subjects received digital nerve blocks by injection of buffered lidocaine on one side and plain lidocaine on the other in a predetermined, randomized order. Pain of infiltration was assessed. Scores were compared using a two-tailed t -test. Standard 1% lidocaine was used if additional anesthetic was required. Measurements and main results: Thirty-one patients were enrolled. Buffered lidocaine was significantly less painful to administer than plain lidocaine ( P t = 4.21). Supplemental anesthesia was required less often for buffered lidocaine (two times) compared with plain lidocaine (six times), although this difference was not statistically significant. Conclusion: Because it causes less pain and is equally efficacious, buffered lidocaine is preferable to plain lidocaine for digital nerve blocks in adults.

Traumatic atlanto-occipital dislocation: A potentially survivable injury

Although survival with traumatic atlanto-occipital dislocation (AOD) is rare, there have been reports of victims who have sustained this injury with good neurological outcome. Plain lateral cervical spine radiography is the initial diagnostic procedure but may miss subtle dislocations. Several methods for the interpretation of the normal atlanto-occipital alignment have been devised and are discussed. Computed tomography (CT) and magnetic resonance imaging (MRI) are valuable studies in the diagnosis and management of AOD. Halo immobilization and posterior spinal fusion are the preferred modes of treatment. Vascular injury may contribute to the neurological deficits seen with AOD and is potentially reversible. Three cases are reported, two with survival of 1 day, and one long-term survivor with poor neurological outcome because of associated cerebral trauma.

Incidence of aspiration after urgent intubation

This study sought to determine the incidence of aspiration after urgent endotracheal intubation (ET) performed in the emergency department (ED), and to offer a descriptive evaluation of these intubations. In a retrospective review of 133 charts, 87 patients met inclusion criteria. Aspiration occurred in 3 (3.5%) patients (95% confidence interval, 0%, 7.4%). One had witnessed aspiration, and 2 had positive sputum cultures. None of the 87 patients had a positive chest radiograph or unexplained hypoxemia up to 48 hours after ET. Rapid-sequence induction and oral ET was performed in 79 (91%) patients, whereas 4 spontaneously breathing patients were nasally intubated. Seventy percent of patients underwent ET by PGY I or II residents, 29% by PGY III or IV residents, and 1% by ED attending physicians. Seventy-seven patients were intubated on the first attempt, and airway blood or vomitus during ET was noted in 11 patients. This study offers significant descriptive information regarding urgent ET performed in the ED, and shows that aspiration after urgent ET occurs infrequently in ED patients.

Spontaneous cervicothoracic epidural hematoma following prolonged valsalva secondary to trumpet playing

Spontaneous spinal epidural hematoma is an uncommon clinical entity. Patients with this disease may present with devastating neurological deficits that can mimic other diseases. Emergency physicians should be familiar with this condition to assure appropriate therapy in a timely manner. A typical case of spontaneous spinal epidural hematoma is presented with review of appropriate differential diagnosis and management.

Geriatric trauma: Outcomes of elderly patients discharged from the ED

This study was undertaken to investigate which patients 65 years of age or older have adverse outcomes after discharge from the emergency department (ED) after an injury. Patients were enrolled prospectively at an urban university center from September 15, 1996, until August 31, 1997. Patients sustaining any potentially serious form of injury were included. Data about comorbid conditions, preinjury medications, and types of injuries sustained were recorded. Patients were contacted at home at least 30 days after discharge and were questioned about their overall health, need for admission since ED discharge, and whether any complications developed. One hundred five consecutive patients were enrolled, but 5 patients were lost to follow-up. There were 74 low-mechanism falls (LMFs), 11 low-mechanism motor vehicle crashes (LMMVCs), 8 high-mechanism motor vehicle crashes (HMMVCs), 3 high-mechanism falls (HMFs), and 4 other types of injuries. Follow-up ranged from 30 to 147 days, with a mean of 49 days. On follow-up, 88 patients were doing well, 9 were fair, and 3 were doing poorly; of the latter, their poor health was unrelated to their injuries. Complications included 2 extremity infections and 1 poorly healing wound. Eleven patients were seen in an ED within the first 30 days after injury, 6 of whom for problems related to their initial injury or its management. These results show that there is a subset of elderly victims of trauma who may be safely discharged home after appropriate evaluation. Return visits to the ED were just as often related to comorbid conditions as to initial injury.