Comparison of fluid types for resuscitation after acute blood loss in mallard ducks (Anas platyrhynchos).

OBJECTIVE: The purpose of this study was to determine the LD(50) for acute blood loss in mallard ducks (Anas platyrhynchos), compare the mortality rate among 3 fluid resuscitation groups, and determine the time required for a regenerative RBC response. DESIGN: Prospective study. SETTING: Medical College of Wisconsin Research facility. ANIMALS: Eighteen mallard ducks were included for the LD(50) study and 28 for the fluid resuscitation study. INTERVENTIONS: Phlebotomy was performed during both the LD(50) and fluid resuscitation studies. Ducks in the fluid resuscitation study received a 5 mL/kg intravenous bolus of crystalloids, hetastarch (HES), or a hemoglobin-based oxygen-carrying solution (HBOCS). MEASUREMENTS AND MAIN RESULTS: The LD(50) for acute blood loss was 60% of total blood volume. This blood volume was removed in the fluid resuscitation study to create a model of acute blood loss. Following fluid administration, 6 birds in the crystalloid group (66%), 4 birds in the HES group (40%), and 2 birds in the HBOCS group (20%) died. No statistical difference in mortality rate was seen among the 3 fluid resuscitation groups. Relative polychromasia evaluated post-phlebotomy demonstrated regeneration starting at 24 hours and continuing through 48 hours. CONCLUSIONS: The LD(50) for acute blood loss in mallard ducks was 60% of their total blood volume. Although no statistical difference in mortality rate was appreciated among the 3 fluid resuscitation groups, a trend of decreased mortality rate was observed in the HBOCS group. An early regenerative response was apparent following acute blood loss.

The effects of a physician-nurse patient care team on patient satisfaction in an academic ED.

The objectives were to investigate the effects of a RN/MD patient care team operational change on ED patient satisfaction. In period 1, RNs had standard room assignments and MDs evaluated patients based upon physician availability and perceived patient load. In period 2, RNs and MDs were organized into 2 patient care "teams" and patients were assigned to teams on an alternating basis. Patient satisfaction was rated using the standard ED Press, Ganey survey instrument. A total of 508 surveys were returned in period 1 and 454 in period 2. From period 1 to 2, overall ED patient satisfaction improved from 78.2 +/- 20.4% to 82.2 +/- 17.2% (improvement from 23rd to 59th percentile, P

Mission-based budgeting hours model: an accurate way to understand physician costs.

Financial resources to manage academic emergency departments are becoming more scarce. The Association of American Medical Colleges (AAMC) has embraced mission-based management (MBM) as one viable option to allocate financial and personnel resources based on medical school goals. The key features of this style are integrating financial statements, measuring faculty activity, holding service line leaders accountable, and building a trust through information sharing. The authors describe how they integrated their service line cost through an hours model. From this they describe a formula for calculating the cost of protected time. The authors use mission-based budgeting to more accurately understand their physician costs and use the formula to effectively negotiate internal and external contracts.

Tissue harmonic imaging improves organ visualization in trauma ultrasound when compared with standard ultrasound mode.

UNLABELLED: The focused abdominal sonography for trauma (FAST) examination is complicated by brightly lit trauma bays, limited time, and body habitus. Recently, new ultrasound (US) technology has become available that improves organ visualization in abdominal scans. OBJECTIVE: The hypothesis was that a new US mode, tissue harmonic (TH) imaging, improves visualization of critical organ relationships in the FAST examination by making use of previously unused frequencies. The authors performed a blind, prospective observational study to compare the images obtained in typical FAST views with those obtained in standard US and TH modes. METHODS: Blunt trauma patients presenting to a level I trauma center between April and September 2000 were enrolled on a convenience basis. Typical FAST views were obtained in standard and TH modes. The emergency ultrasonographer (EU) switched between modes for each view, optimizing the gain each time. Multiple digital still images were made with all indications of the mode used disguised. For each view on a patient, the best image in each mode was selected in a blinded fashion. Three experienced EUs, blinded to the mode used, rated each image pair for resolution, detail, and total image quality as previously defined on a ten-point Likert scale, 10 being the best for each category. Wilcoxon signed-ranks test, 95% confidence intervals (95% CIs), and interobserver correlation were calculated. RESULTS: A total of 76 image groups (39 of Morison's pouch, 20 splenorenal, and 17 bladder) from 52 patients were rated. Tissue harmonics produced improved resolution, detail, and quality when compared with the standard US mode, with median scores of 6.7 vs. 6.0, 6.7 vs. 6.0, and 6.3 vs. 6.0, respectively. The differences of 0.7 (95% CI = 0.4 to 0.93), 0.7 (95% CI = 0.4 to 0.93), and 0.33 (95% CI = 0.17 to 0.67) were statistically significant, with p = 0.0001, 0.0001, and 0.0003, respectively. There was good interobserver agreement (kappa = 0.74; 95% CI = 0.68 to 0.79). CONCLUSIONS: Tissue harmonics produced FAST images higher in detail, resolution, and total image quality than standard-mode US images.