Lisa Chan

Complication rates of tube thoracostomy

This study compared the complication rates of tube thoracostomy performed in the emergency department (ED) versus the operating room (OR) and the inpatient ward (IW). A retrospective case series of all patients at an urban, university-based level 1 trauma center hospital who received tube thoracostomy for any indication between 1/1/93 and 12/31/93 was conducted. Complications were defined as empyema, unresolved pneumothorax (persistent air leak or residual pneumothorax), persistent effusion, or incorrect placement. The data for age and duration of tube placement were weighted for analysis of variance (ANOVA). A total of 352 tube thoracostomies was placed in 239 patients. Twenty-three patients had three or more chest tubes placed, 65 had two placed, and the remaining 181 had a single tube. Ninety-nine tubes were placed in the ED, 87 in the OR, and 166 on IW. The mean age of patients in the ED was 37 years, and differed significantly (P < .015) from those in the OR (48 years) and the IW (44 years). The duration of tube placement was similar for all groups (mean = 6.5 days). The overall complication rates related to tube insertion were: ED, 14.0%; OR, 9.2%; IW, 25.3%. Significance was achieved when comparing complication rates between the ED and IW, with less complications in the ED (P = .0436). When comparing complication rates between the ED and OR, there was no significant difference (P = .3643). A power calculation indicated too small of a sample size to truly determine an insignificant difference between complication rates between the ED and OR. Placement of emergent thoracostomy tubes in the ED does not result in an increased complication rate as compared to placement in the IW.

Variables That Affect Patient Throughput Times in an Academic Emergency Department

One of the most important parameters that influence patient satisfaction with emergency department care is their perception of throughput time. It is defined in our department as the time from patient arrival to time of discharge. Measurement of throughput time is one ob jective measure of efficiency that is feasible in most emer gency departments. The purpose of this study is to analyze the impact of certain demographic and resource utiliza tion factors on patient throughput times. Analysis of vari ants through multiple regression was used to determine associations between the average daily throughput time and factors commonly assumed to have significant influ ence on patient throughput time. Our data analysis found that patient throughput was significantly affected by the number of inpatient admissions from the emergency de partment, daily census in the main emergency depart ment, pediatric volume, and the number of ambulance arrivals. Several factors that were commonly assumed to affect patient throughput time, such as nursing hours worked and day of the week, were not significant.

Sagittal sinus thrombosis after closed head injury

Superior sagittal sinus thrombosis (SSST) is an unusual disorder, most often attributed to hematological abnormalities, oral contraceptive use, or association with the puerperium. Although SSST secondary to trauma has been reported, it still remains an extremely rare entity. Antemortem diagnosis of SSST is made by findings on computed tomographic scanning, cerebral angiography, or magnetic resonance imaging. Prognosis is variable and spontaneous resolution has been reported. Successful treatment options of spontaneous cases include systemic anticoagulation and thrombolytic therapy along with supportive measures. There are currently no guidelines for the management of SSST associated with traumatic brain injury. This report describes a case of SSST in a man who sustained a closed head injury.

A retrospective review of positive chlamydial cultures in emergency department patients

This study evaluated the accuracy of diagnosis and treatment of chlamydial infection based solely on clinical presentation in the emergency department (ED). The signs and symptoms of women with chlamydial infection confirmed by cervical culture were identified and compared between appropriately treated and nontreated groups to determine which clinical features tended to lead to the correct or incorrect diagnosis. The study also determined which signs and symptoms were consistently present in the entire study group. Two hundred thirty-three charts of female ED patients with positive cervical chlamydial cultures were obtained via computerized records from the microbiology lab and reviewed retrospectively. Only 20% of the patients were correctly diagnosed as having a sexually transmitted disease and only 24% were properly treated during their initial ED visit. Although abdominal pain and vaginal discharge were the most frequent symptom and sign, only 70% and 54% of all patients had these clinical manifestations, respectively. Patients with vaginal discharge and cervical motion tenderness were significantly (P < .01) more likely to be treated in the ED. Patients with urinary tract symptoms and pregnancy were significantly (P < .01) less likely to be treated in the ED. Cervical cultures should be performed during all pelvic examinations because of the variability in the clinical presentation of chlamydial infection. A follow-up system must be in place to identify positive cultures and locate patients to ensure appropriate treatment.

Comparison of capillary and venous glucose measurements in healthy volunteers

Background. Out-of-hospital (OOH) emergency personnel measure serum glucose in order to determine the need for dextrose therapy. Most devices that measure serum glucose are designed to use capillary blood obtained from a finger puncture. However, OOH emergency personnel often use venous blood obtained during intravenous line (IV) placement to determine serum glucose. Objective. To compare capillary and venous glucose measurements. Methods. This prospective study used healthy, non-fasting volunteers. Simultaneous venous and capillary blood samples were obtained from each subject. Glucose levels were measured using a glucometer designed for capillary samples. The capillary and venous measurements were compared using a Pearson correlation coefficient. Power analysis revealed that the study had the ability to detect a difference of 15 mg/dL. Results. Ninety-seven volunteers (56 males, 41 females) with a mean age of 37 ± 11.9 years were enrolled. The mean capillary and venous glucose values were 104.5 ± 20.7 mg/dL and 109.7 ± 22.4 mg/dL, respectively. The Pearson correlation coefficient was 0.24. Conclusions. The correlation between venous and capillary blood glucose measurements is relatively poor in this group of healthy volunteers. Further research must be conducted on patients at risk for abnormal blood glucose.

Tension pneumoperitoneum caused by blunt trauma

Tension pneumoperitoneum (TPP), the accumulation of free intraabdominal air under pressure, is a rare event. TPP usually occurs from bowel surgery or bowel perforations. Less commonly, TPP occurs in the presence of pneumothoraces or during positive pressure ventilation. Trauma has rarely been a reported cause of TPP. The cases of 2 patients with TPP after blunt trauma are reported. The pathophysiology and management of TPP are discussed.

Impact of medical student preceptorship on ED patient throughput time

A prospective, consecutive study was performed to determine if medical student supervision in the emergency department (ED) changes patient throughput time (ie, the time from triage to discharge). The mean patient throughput time on days when medical students were present in the ED (group 1) was compared to the mean patient throughput time on days when medical students were absent from the ED (group 2). Throughput time was measured in minutes. The mean throughput times of the two groups were compared by the two tailed t test (P < .05). The study had a power of 90% (beta = .10) to detect a throughput time difference of 20 minutes. The two groups were also compared for mean daily acuity (as gauged by mean daily number of patient admissions) and mean daily patient census. The differences in mean daily throughput times (group 1, 145.2 min v group II, 150.6 min; P = .40), mean daily census (group 1, 28.1 patients v group 2, 28.1 patients; P = .75), and mean daily admissions (group 1, 10.4 patients v group 2, 10.7 patients; P = .74) were all insignificant. Precepting medical students in this ED did not significantly change patient throughput times.

ED echocardiography for peripartum cardiomyopathy.

Although peripartum cardiomyopathy is uncommon, emergency physicians should be knowledgeable of it because of its high morbidity and mortality. Emergency physicians should be alert to the fact that the clinical presentation of peripartum cardiomyopathy is nonspecific. Its clinical manifestations are found in other medical conditions that can present in the late prepartum or postpartum patient. We present a case of peripartum cardiomyopathy that illustrates how its nonspecific respiratory signs and symptoms led to an initial diagnosis of pulmonary embolism. The case also highlights the need for echocardiography in the evaluation of peripartum cardiomyopathy. We discuss the clinical presentation, diagnosis, and treatment of peripartum cardiomyopathy.

An unusual presentation of cat scratch encephalitis

Cat scratch disease is an infectious illness that has been recognized since the 1880s; however, our understanding and knowledge of it is still evolving (1). It was not until 1991 that the etiologic species, Rochalimaea, was finally confirmed (2,3). Only recently have the breadth of its clinical spectrum and the population at risk been appreciated. We now realize that signs and symptoms that had been considered cardinal for diagnosis may be absent. Cat scratch disease was known to afflict primarily children and adolescent; however, the incidence of CSD is increasing in immunocompromised groups, such as AIDS and transplant patients (3,4). The recent discovery of the infectious agent and improved understanding of the disease process have led to new approaches in diagnosis and treatment. We present a report of a patient with cat scratch disease who presented with seizure and altered mental status secondary to encephalitis.

Secondary arterioenteric fistula involving the sigmoid colon

An arterioenteric fistula is a life-threatening condition. Whereas most arterioenteric fistulae involve the duodenum, they can occur at any point along the gastrointestinal tract, and those to the lower tract may present with less classic symptoms than arterioduodenal fistulae. It is likely that more patients with arterioenteric fistulae will present to the emergency department (ED) in the future because of an increasing number of elective aortic aneurysm repairs in an aging population. We present a patient with a secondary fistula involving the sigmoid colon who presented to the ED with abdominal pain and a tender abdominal mass.