Diagnostic Point-of-Care Ultrasound: Recommendations From an Expert Panel.

Diagnostic point-of-care ultrasound (PoCUS) has emerged as a powerful tool to help anesthesiologists guide patient care in both the perioperative setting and the subspecialty arenas. Although anesthesiologists can turn to guideline statements pertaining to other aspects of ultrasound use, to date there remains little in the way of published guidance regarding diagnostic PoCUS. To this end, in 2018, the American Society of Anesthesiologists chartered an ad hoc committee consisting of 23 American Society of Anesthesiologists members to provide recommendations on this topic. The ad hoc committee convened and developed a committee work product. This work product was updated in 2021 by an expert panel of the ad hoc committee to produce the document presented herein. The document, which represents the consensus opinion of a group of practicing anesthesiologists with established expertise in diagnostic ultrasound, addresses the following issues: (1) affirms the practice of diagnostic PoCUS by adequately trained anesthesiologists, (2) identifies the scope of practice of diagnostic PoCUS relevant to anesthesiologists, (3) suggests the minimum level of training needed to achieve competence, (4) provides recommendations for how diagnostic PoCUS can be used safely and ethically, and (5) provides broad guidance about diagnostic ultrasound billing.

4-Valve Heart Disease and Right Heart Failure.

Carcinoid heart disease is a rare form of heart disease due to secretion of vasoactive compounds, including serotonin, from gastrointestinal tumors. This E-challenge examines the case of a patient with advanced carcinoid heart disease who presented to the operating room (OR) for a tricuspid valve replacement. Once the patient was in the OR, intraoperative transesophageal echocardiography was used to discover a patent foramen ovale and involvement of all 4 valves with regurgitant lesions. The patient underwent tricuspid valve replacement, pulmonic valve replacement, right ventricular outflow tract reconstruction, and patent foramen closure in the OR and experienced subsequent fulminant right heart failure. Mechanical circulatory support was required to separate the patient from cardiopulmonary bypass, which was first attempted with an intra-aortic balloon pump and subsequently achieved with implantation of a right ventricular assist device. Multiple reports of acute right heart failure are available in the literature; however, this case helps illustrate several important considerations for the anesthesiologist. The effects of chronic circulating vasoactive compounds on the heart valves are well documented; however, it is likely that advanced carcinoid heart disease also will trigger pre-existing myocardial dysfunction, which may be underappreciated. Identifying patients who are at high risk for intraoperative right heart failure and considering what constitutes an adequate preoperative assessment of right heart function aid in preparing for OR management. In addition, reviewing the potential options for managing these patients when the traditional therapies are inadequate, including mechanical support and extracorporeal circulation, is a useful exercise in preparation. This case also highlights the contributions of intraoperative transesophageal echocardiography in the diagnosis and management of carcinoid heart disease, the need for additional preoperative optimization of these patients, and the management and potential complications of mechanical support.

Navigating the Landscape of Precision Education: Insights From On-the-Ground Initiatives.

ABSTRACT: A central goal of precision education (PE) is efficiently delivering the right educational intervention to the right learner at the right time. This can be achieved through a PE cycle that involves gathering inputs, using analytics to generate insights, planning and implementing interventions, learning and assessing outcomes, and then using lessons learned to inform modifications to the cycle. In this paper, the authors describe 3 PE initiatives utilizing this cycle. The Graduate Medical Education Laboratory (GEL) uses longitudinal data on graduate trainee behavior, clinical skills, and wellness to improve clinical performance and professional fulfillment. The Transition to Residency Advantage (TRA) program uses learner data from medical school coupled with individualized coaching to improve the transition to residency. The Anesthesia Research Group for Educational Technology (TARGET) is developing an automated tool to deliver individualized education to anesthesia residents based on a longitudinal digital representation of the learner. The authors discuss strengths of the PE cycle and transferrable learnings for future PE innovations. Common challenges are identified, including related to data (e.g., volume, variety, sharing across institutions, using the electronic health record), analytics (e.g., validating augmented intelligence models), and interventions (e.g., scaling up learner assessments with limited resources). PE developers need to share their experiences in order to overcome these challenges, develop best practices, and ensure ethical development of future systems. Adapting a common framework to develop and assess PE initiatives will lead to a clearer understanding of their impact, help to mitigate potential risks, and allow deployment of successful practices on a larger scale.

Postoperative apnea, respiratory strategies, and pathogenesis mechanisms: a review.

Recovery from anesthesia is ideally routine and uneventful. After extubation, the recovering postoperative patient ought to breathe without supportive care or additional oxygenation. It has been demonstrated in previous studies that postoperative pulmonary complications are clinically relevant in terms of mortality, morbidity, and length of hospital stay. Compromised postoperative ventilation can be described as the condition in which the postoperative patient does not have satisfactory spontaneous ventilation support and adequate oxygenation. Causes of impaired ventilation, oxygenation, and airway maintenance can be mechanical, hemodynamic, and pharmacologic. This review describes prevalence and differential diagnosis, including co-morbidities of postoperative apnea. The physiological mechanisms of breathing and prolonged postoperative apnea are also reviewed; these mechanisms include influences from the brainstem, the cerebral cortex, and chemoreceptors in the carotid and aortic body. Causes of prolonged postoperative apnea and management are also discussed.

Ultrasound Rounds: Anesthesiologist-Performed Intraoperative Point-of-Care Focused Assessment With Sonography in Trauma Examination Changes Surgical Management.

Focused Assessment with Sonography in Trauma (FAST) examinations have been performed for decades by surgeons during initial patient presentation for emergency care and surgical planning, as well as for guiding resuscitation. This case highlights how use of intraoperative FAST examinations performed by anesthesiologists can dramatically change patient management. Use by anesthesiologists perioperatively is an important skill, although it is not widely practiced.

Perioperative Point of Care Ultrasound for Hemodynamic Assessment: A Narrative Review.

While transesophageal echocardiography (TEE) has traditionally been used in perioperative care, there is growing evidence supporting point of care ultrasound (POCUS) for the anesthesiologist in guiding patient care. It is a quick way to non-invasively evaluate hemodynamically unstable patients and ascertain their state of shock, determine volume status, and guide resuscitation in cardiac arrest. In addition, through use of POCUS, the anesthesiologist is able to identify signs of chronic heart disease to provide a more tailored and safer approach to perioperative care.

Utilization of the Transgastric View of the Left Atrial Appendange for Procedural Guidance during Left Atrial Appendage Clip Via Video-assisted Thoracoscopic Surgery.

Left atrial appendage (LAA) ligation is procedure which isolates the LAA and can decrease the risk of thrombus and arrhythmias in patients with atrial fibrillation, allowing patients to come off home anticoagulation medications. This procedure can be done through minimally invasive thoracoscopic surgery and requires guidance by transesophageal echocardiography. Visualization of the LAA and associated intrathoracic structures is vital for the success of the procedure. This echo rounds report describes an under-utilized method for LAA assessment to encourage cardiac anesthesiologists to consider employing it to increase their ability to completely evaluate the LAA.

Aorto-Left Atrial Fistula as Sequela of Endocarditis.

Aortoatrial fistula formation is a rare complication of bacterial endocarditis. Fistulous tracts may form between the aorta and either atrium. Clinical presentation varies from an insignificant murmur to refractory congestive heart failure. Most clinically relevant fistula manifests with acute and severe symptoms. Transesophageal echocardiography (TEE) is more sensitive than transthoracic echocardiography (TTE) in diagnosing intracardiac shunts, and invaluable in guiding intraoperative surgical repair. Definitive therapy involves closure of the fistula either through an open surgical approach or percutaneously with an occluder device.

A Case Report Describing the Use of Point of Care Ultrasound to Guide Successful Cardiopulmonary Resuscitation After Unanticipated Arrest in Ambulatory Surgery.

We present a case of a 41-year-old man who suffered cardiac arrest after induction of general anesthesia for an ambulatory ophthalmologic procedure. In this report, we highlight the use of focused transthoracic echocardiography by the anesthesia team to guide a prolonged resuscitation. Emergency room and critical care physicians have described the use of focused echocardiography to aid in diagnosing correctible causes of cardiac arrest, predicting outcomes, and in decision making regarding termination of resuscitation. We discuss benefits and barriers to anesthesiologists incorporating focused cardiac ultrasound into the perioperative arena.