Systemic-to-pulmonary artery pressure ratio as a predictor of patient outcome following liver transplantation.

AIM: To assess the value of the mean systemic-to-pulmonary artery pressure (MAP/mPAP) ratio for predicting outcomes following orthotopic liver transplant (OLT). METHODS: A retrospective data analysis was performed and data (mean arterial blood pressure, mean pulmonary artery pressure and Cardiac Index) were collected at several points during OLT. Outcomes evaluated were duration of postoperative endotracheal intubation [ET; minutes after intensive care unit (ICU) arrival], length of ICU stay, total hospitalization and frequency of immediate postoperative complications. A total of 91 patients were included in the data analysis. Based on the intraoperative course of the MAP/mPAP ratio, 2 hemodynamic responses were identified: Group 1 (MAP/mPAP ratio increase during anhepatic period with postreperfusion recovery, n = 66); and Group 2 (MAP/mPAP ratio with no change during anhepatic period or decreased without recovery, n = 25). RESULTS: The main finding was that the lack of increased MAP/mPAP ratio in the anhepatic period was associated with: (1) longer intubation times; and (2) prolonged ICU stays and total hospitalization time, when compared to patients with an increase in MAP/mPAP ratio during the anhepatic period. CONCLUSION: The data from this retrospective study should raise awareness to the mean systemic to pulmonary artery pressure ratio as a potential indicator for poor outcome after OLT. Further prospective studies are needed for validation.

A Competitive Objective Structured Clinical Examination Event to Generate an Objective Assessment of Anesthesiology Resident Skills Development.

Residency programs are charged with teaching, assessing, and documenting resident competency for a multitude of skills throughout the course of residency training. An innovative, competition-based objective structured clinical examination event was designed in our department to objectively assess the skill level of anesthesiology residents. After conducting the identical event for 2 years in postgraduate year 1 (PGY1) and postgraduate year 2 (PGY2) residents, we tested the hypothesis that the event can provide adequate standardization to appropriately document progression in technical and nontechnical skills. Twenty-one residents participated in both events during their PGY1 and PGY2 years: n = 10, 2012/2013, n = 11, 2013/2014. The PGY1 participants in 2012 were retested in 2013 (as PGY2 residents) during an identical event, and their performance was compared as a group and on an individual level. The PGY1 residents in 2013 did the same in 2014. Four workstations were analyzed to determine whether improvement in performance occurred between the PGY1 and the PGY2 years: (1) preoperative assessment, (2) operating room anesthesia station checkout, (3) peripheral IV and endotracheal tube placement, and (4) transfer of care in the postanesthesia care unit. The performances of PGY1 and PGY2 residents were compared. The assessments were performed by anesthesiology faculty using checklists, time to complete task, and Likert scale ratings. Data analysis showed improved technical anesthesia skills (operating room setup, peripheral IV, and endotracheal tube placement) and more complete anesthesia-related information management in the preoperative assessment and postoperative transition of care in the postanesthesia care unit in PGY2 residents compared with the PGY1 performance of the same residents. The described event is a valuable tool for objective assessment of multiple anesthesia skills and possible milestones during residency.

Evaluation of a High-Fidelity Simulation Training Program for New Cardiothoracic Intensive Care Unit Nurses.

The objective of this article is to evaluate the effect of a high-fidelity simulation training program on knowledge and confidence as part of a nursing internship in the cardiothoracic intensive care unit. Ten nurse interns each completed a simulation scenario involving common postoperative complications followed by a group debriefing session. Knowledge and confidence were assessed using a multiple-choice test and modified self-efficacy scale, respectively. Both were administered precourse and postcourse and again 2 weeks later. The simulation effectiveness tool, a 0-2 scale with higher scores indicating higher degree of perceived effectiveness, was used to evaluate participants׳ perceptions of the program. Paired t-tests compared precourse and postcourse scores as well as postcourse and follow-up scores for both knowledge and confidence. Spearman rho compared subjective with objective assessment of learning and improvement in learning with improvement in confidence. Mean knowledge scores improved from 48.18% (standard deviation [SD] = 14.7) to 60.9% (SD = 22.6; P < 0.05) and confidence scores improved from 20.8 (SD = 5.17) to 25.9 (SD = 3.3; P < 0.05), both with insignificant changes 2 weeks later. The simulation effectiveness tool mean score was 1.64 (SD = 0.56). There was no correlation between the objective and subjective learning assessments or between the improvement in learning and improvement in confidence. The inclusion of a high-fidelity simulation course showed improvement in both learning and confidence among the new graduate nurses; however, objective assessment of learning is needed. It is also important to note that an improvement in confidence may not indicate an improvement in actual ability.

Objective Assessment of Anesthesiology Resident Skills Using an Innovative Competition-Based Simulation Approach.

Residency programs are charged with teaching, assessing, and documenting resident competency for a multitude of skills. Documentation of competency requires demonstrating specific milestones mandated by the Accreditation Council for Graduate Medical Education. Our department designed an innovative, competition-based approach to objectively assess the skill level of postgraduate year 1 residents in performing basic anesthesia-related tasks after 1 month of anesthesiology training. We launched an "Olympic" event to assess requisite skills in an environment of friendly competition. A simulation format was chosen to allow standardized objective assessment of the resident's skill level at an early stage of training, with possible identification of and intervention for skills needing improvement. Our experience may serve as a template for other programs and specialties developing processes for assessing and documenting improvement in skill and competency over the course of residency training.

The impact of exposure to liver transplantation anesthesia on the ability to treat intraoperative hyperkalemia: a simulation experience.

The objective of this study was to assess whether resident exposure to liver transplantation anesthesia results in improved patient care during a simulated critical care scenario. Our hypothesis was that anesthesia residents exposed to liver transplantation anesthesia care would be able to identify and treat a simulated hyperkalemic crisis after reperfusion more appropriately than residents who have not been involved in liver transplantation anesthesia care. Participation in liver transplantation anesthesia is not a mandatory component of the curriculum of anesthesiology training programs in the United States. It is unclear whether exposure to liver transplantation anesthesia is beneficial for skill set development. A high-fidelity human patient simulation scenario was developed. Times for administration of epinephrine, calcium chloride, and secondary hyperkalemia treatment were recorded. A total of 25 residents with similar training levels participated: 13 residents had previous liver transplantation experience (OLT), whereas 12 residents had not been previously exposed to liver transplantations (non-OLT). The OLT group performed better in recognizing and treating the hyperkalemic crisis than the non-OLT group. Pharmacologic therapy for hyperkalemia was given earlier (OLT 53.3 ± 27.0 seconds versus non-OLT 148 ± 104.1 seconds; P < 0.01) and hemodynamics restored quicker (OLT 87.9 ± 24.9 seconds versus non-OLT 219.9 ± 87.1 seconds; P < 0.01). Simulation-based assessment of clinical skills is a useful tool for evaluating anesthesia resident performance during an intraoperative crisis situation related to liver transplantations. Previous liver transplantation experience improves the anesthesia resident's ability to recognize and treat hyperkalemic cardiac arrest.

Transesophageal echocardiography monitoring in the delivery of a preeclamptic parturient with severe left ventricular noncompaction.

A multidisciplinary approach to the preterm delivery of a preeclamptic parturient with severe left ventricular (LV) noncompaction and pulmonary hypertension using transesophageal echocardiography (TEE) as a monitor of hemodynamic status in lieu of a pulmonary artery catheter during general anesthesia for Cesarean section is presented. This case adds to the available literature on LV noncompaction with pulmonary hypertension in preeclamptic parturients, and addresses the anesthetic concerns and approaches to management using echocardiography in these highly complex patients.

Using software-based simulation for resident physician training in the management of temporary pacemakers.

INTRODUCTION: An understanding of epicardial pacing is essential for the postoperative management of patients having cardiac surgery. By developing a software-based epicardial pacing program to be used with the existing patient simulator, resident physicians may be exposed to various clinical scenarios that might be encountered while caring for a postoperative heart patient. This experience will assist junior residents with no prior experience to become familiar and competent in the management of epicardial pacemakers. METHODS: The simulation session used the human patient simulator in combination with an internally developed computer program using Flash animation to present arrhythmias and various epicardial pacing interventions commonly used in the postoperative period. By modeling the Flash animation software after a pulse generator, the user is able to make adjustments (type of pacing, rate of pacing, and chamber output) as if using an actual pulse generator. A group of 15 anesthesiology residents who had minimal or no epicardial pacing experience underwent the simulation training. Feedback was obtained by an anonymous postscenario questionnaire. RESULTS: A detailed description of the scenario and computer program is provided. All participants provided positive feedback and have strongly agreed that the simulation session improved their understanding and management of epicardial pacemakers. CONCLUSIONS: Our experience with epicardial pacing simulation was demonstrated to be effective in increasing the confidence of junior anesthesiology residents with little or no prior experience with regard to the management of temporary pacemakers.

Transesophageal echocardiography for the noncardiac surgical patient.

Transesophageal echocardiography (TEE) has been established as a very valuable asset for patient monitoring during cardiac surgery. The value of perioperative TEE for patients undergoing noncardiac surgery is less clear. This article reviews the technical aspects of TEE and comments on the potential benefit of using TEE as a monitoring modality apart from cardiac surgery. Based on patient's comorbidities and/or injury pattern, TEE is a fast and minimally invasive approach to obtain important hemodynamic information, especially useful in a hemodynamically unstable patient. However, certain requirements for the use of the technique are necessary, most important the development of sufficient echocardiographic skills by the anesthesiologists. Indications, skill requirements, and possible complications of the technique are reviewed.

Surgical resident training using real-time simulation of cardiopulmonary bypass physiology with echocardiography.

BACKGROUND: With increasing complexity of medical care and continuing limitations on medical education, the use of simulation is becoming ever more important. Several simulators have been developed to teach procedural-based surgical tasks. The care of the cardiac surgical patient requires an in-depth understanding of physiology, particularly as pertains to cardiopulmonary bypass. We describe the use of the Human Patient Simulator (HPS) to teach perioperative fundamentals to surgical residents. METHODS: General surgery residents from the University of Kentucky participated in an interactive simulation pilot program. The METI (Medical Education Technology, Inc, Sarasota, Florida) HPS was used with custom programming to demonstrate simulated intraoperative and postoperative physiology related to cardiopulmonary bypass. Didactics, in addition to intraoperative echocardiographic images, were provided. Fund of knowledge was assessed by a computerized pre- and posttest that was administered to the trainees, and self-assessment data were collected using a Likert scale. RESULTS: Nineteen general surgery residents participated. An overall improvement in performance on the test was demonstrated from 63% correct to 85% correct. In general, residents found the simulation useful, appreciated the opportunity to treat crisis situations without risk of harm to a patient, and felt they could apply the knowledge gained from this program in their future practice. CONCLUSIONS: Simulation serves as a useful adjunct to medical education. We have demonstrated the use of the HPS to provide a real-time simulation of the physiology of cardiopulmonary bypass and postoperative care. We plan to use this system as part of our standard curriculum of training rotating residents and junior fellows and anticipate this system could be used as part of future cardiothoracic simulations.

Initial results of a structured rotation in hematology and transfusion medicine for anesthesiology residents.

STUDY OBJECTIVE: To develop and evaluate a new curriculum in transfusion medicine for anesthesiology residents. STUDY DESIGN: Quasi-experimental study. SETTING: Single center, pilot curriculum in the anesthesiology residency program at a university-affiliated medical center. PARTICIPANTS: Group TM consisted of residents who participated in the one month-long transfusion medicine rotation in postgraduate year 2 (PGY2; n = 9). The comparison group (non-TM) consisted of residents who had no exposure to the transfusion medicine rotation (n = 21). MEASUREMENTS: We compared results of the 2009 American Board of Anesthesiology In-Training Exam (ABA-ITE) 2009 by residents of our program with the national performance of residents in the first clinical anesthesia year (AMG CA1 = PGY-2) and second clinical anesthesia year (AMG CA2 = PGY-3) on transfusion medicine/hematology knowledge. Performance on a pre-test and post-test of those who took part in the transfusion medicine curriculum, and overall performance on the ABA-ITE, of departmental residents who had and had not participated in the Transfusion Medicine curriculum within the target knowledge area of hematology/transfusion medicine and compared against national peer performance data, was assessed. An anonymous electronic survey (5-Point Likert scale) was used to assess the perceived educational value of the curriculum. MAIN RESULTS: Transfusion medicine-related knowledge of anesthesia residents markedly improved from the pre- to post-rotation examination and on the ABA-ITE. In the ABA-ITE 2009, the TM group performed better than their national peers (AMG CA1 and CA2) in the hematology content area. The post-rotation anonymous resident survey indicated high resident satisfaction. CONCLUSIONS: A structured transfusion medicine curriculum improved anesthesiology resident knowledge in transfusion medicine and was associated with high learner satisfaction.

Neurophysiological monitoring simulation using flash animation for anesthesia resident training.

INTRODUCTION: Surgery of the spine is associated with the possible complication of permanent nerve injury. Neurophysiological monitoring is widely used during spine surgery to decrease the incidence and severity of neurologic injury. A profound understanding of physiological and pharmacological factors influencing evoked potentials is expected from the anesthesia provider. METHODS: Because demonstration and teaching of all somatosensory evoked potential (SSEP) changes is difficult in the clinical environment, we developed human patient simulator scenarios to facilitate the anesthesia resident training in neurophysiological monitoring. A SSEP simulation for resident training was created using flash animation in a patient simulation program and is the focus of this report. Feedback from participants (anesthesia residents) was obtained by a postscenario survey. RESULTS: This report provides a detailed description of the scenario and computer program. The survey findings indicated that the simulation session is an effective teaching method of SSEP monitoring. CONCLUSION: Flash animation integration into a patient simulation program for SSEP monitoring appears to be an effective method for anesthesia resident education in neurophysiological monitoring.

Anesthetic implications of obesity in the surgical patient.

The obese patient presents many challenges to both anesthesiologist and surgeon. A good understanding of the pathophysiologic effects of obesity and its anesthetic implications in the surgical setting is critical. The anesthesiologist must recognize increased risks and comorbidities inherent to the obese patient and manage accordingly, optimizing multisystem function in the perioperative period that leads to successful outcomes. Addressed from an organ systems approach, the purpose of this review is to provide surgical specialists with an overview of the anesthetic considerations of obesity. Minimally invasive surgery for the obese patient affords improved analgesia, postoperative pulmonary function, and shorter recovery times at the expense of a more challenging intraoperative anesthetic course. The physiologic effects of laparoscopy are discussed in detail. Although laparoscopy's physiologic effects on various organ systems are well recognized, techniques provide means for compensation and reversing such effects, thereby preserving good patient outcomes.

The patient simulator for training of anesthesia residents in the management of one lung ventilation.

Simulators are used extensively for the training of medical personnel. All anesthesia providers should be prepared and trained in the management of one lung ventilation for pulmonary surgery, yet familiarization with one lung ventilation may not be possible on a routine basis in the operating room. Therefore, this reports details the first use of the patient simulator (PS) to enhance the training of anesthesia residents in the management of one lung ventilation. A detailed report of our computer program for simulating one lung ventilation is included.

Electrolyte changes during craniotomy caused by administration of hypertonic mannitol.

We report a 31-year-old woman scheduled for a right frontal craniotomy and debulking of a recurrent grade 3 astrocytoma. Mannitol was given at the request of the surgeons. Peaked T waves were noted on electrocardiography, and electrolyte analysis showed hyperkalemia and hyponatremia.

Using a mannequin-based simulator for anesthesia resident training in cardiac anesthesia.

Simulators are used for training medical personnel. This report details the use of a human patient simulator for initial clinical experience of anesthesia housestaff with cardiopulmonary bypass.

Integrating echocardiography into human patient simulator training of anesthesiology residents using a severe pulmonary embolism scenario.

INTRODUCTION: Echocardiographic images were integrated into patient simulation (PS)-based resident training with a goal of highlighting the applicability and limitations of pure pressure-based measurements in the management of different disease states. METHODS: Relevant echocardiographic images were selected, categorized, and sequenced to best represent specific hemodynamic changes and incorporated into a Powerpoint slideshow. Appropriate PS scenarios were then created to represent the hemodynamic changes seen with the selected pathophysiologic states. Instructors then displayed the visual images along with PS scenarios during lecture and testing sessions at the PS bedside during standard didactic sessions with small groups of anesthesiology residents and informal resident testing sessions. CONCLUSIONS: The use of echo images to demonstrate, in real time, the hemodynamic consequences of changes in myocardial contractility, cardiac chamber volume, and valvular function is possible during PS in anesthesiology residency training. Echo imaging as a teaching tool during anesthesiology residency may yield a greater understanding of the pathophysiology of certain disease states, ultimately leading to faster diagnosis and more appropriate intervention by anesthesiologists.

Anesthetic choices in surgery.

Advances in technology and pharmacology continue to change techniques for anesthesia. So-called "fast-track" anesthesia has led to the development of new anesthetic agents and changes in anesthetic practice, including the increased use of regional anesthesia, techniques involving continuous plexus catheters to improve postoperative analgesia, and total intravenous anesthesia. Technological advances now provide additional options for airway management when a difficult airway is encountered. Advances have also produced additional intraoperative monitoring through the use of depth-of-anesthesia monitors and transesophageal echocardiography. Future areas of development are likely to include target-controlled infusion pumps as well as techniques and medi-cations that improve fast-track anesthesia safely.