On 16 October 1846, an itinerant New England dentist named William T. G. Morton proved the anesthetic effect of diethyl ether in a public demonstration in the "ether dome" of the Bulfinch Building of the Massachusetts General Hospital in Boston. The patient, Gilbert Abbott, suffered no pain, and the surgeon, Dr. John C. Warren, was able to complete a suture ligature of a vas cular tumor of the jaw without the hurry that until then was so necessary. The operation proved a failure, since the tumor recurred; but the demonstration of ether's anesthetic effect was a great success. Operative pain was conquered, and surgery could advance from a crude and unscientific practice where speed was paramount, and the major body cavities could not be entered, into the unique blend of science and art that it is now. "Gentlemen, this is no hum bug," supposedly muttered Warren, perhaps the last noncontroversial assess ment of anesthesiology to be made by a surgeon. The screams of resisting patients in pain were stilled, and quiet entered the operating room for the first time. But the new science of pain relief was quickly wrapped in controversy. An argument immediately arose as to who could legitimately claim primacy for the discovery. Morton's attempt to hide the true nature of his anesthetic agent, coupled with an effort to patent the discovery, clouded his reputation and stimulated other claimants to push themselves forward."

Ronald Brisman, M.D. This book will discuss three areas where the The multiplicity of procedures with varying neurosurgeon may provide an important degrees of risks and benefits sometimes re contribution to the relief of intractable pain: quires a sequential approach, but always an trigeminal and other facial neuralgias, chronic individual one, matching an appropriate treat noncancer pain, and cancer pain. By one ment plan or procedure for a particular patient intervention, the neurosurgeon often may pro at a specific time in his or her illness. vide long-lasting pain relief. New techniques, The neurosurgical chapters in this book which have developed since the 1970s and represent my experience with several hundred continue to evolve, dominate the neurosur patients during a 12-year period from 1975 gical armamentarium because they are not only through 1987. I have relied heavily on the effective, but safe. These include percutaneous works of others, which have been quoted from radio frequency electrocoagulation for trigem the neurosurgical literature, but this book is inal neuralgia, spinal stimulation for chronic not meant to be encyclopedic. noncancer pain, and intraspinal morphine in At least as important as knowing when to fusion for cancer pain. operate is knowing when not to do so, and this Sometimes a procedure relieves pain but the is particularly true of the treatment of pain. pain recurs; it may be necessary to repeat the Most patients with pain do not require neuro procedure, which in the case of radiofrequency surgical intervention."

Dr. G. M. Woerlee is well known in my department both as a clinician and teacher. Years ofexperience have taught him that the problems discussed here have as yet not been treated in this way in any single work. In my opinion there is a real need for such abook, not only for resident and specialist anaesthetists, but also among surgeons and internists, specialist and trainee. Management of a patient in the operating room is a matter of teamwork, and knowledge of the problems encountered is the basis of any mutual understanding The information which has been assembled and clearly presented in this book should prove to be of great assistance in guiding our patients though an important phase of their lives. Professor Dr. Joh. Spierdijk, Department of Anaesthesia, University Hospital of Leyden, The Netherlands. vii PREFACE Much of the literature being published in the field of anesthesiology today concerns a narrow, in-depth scrutiny of a specific area or anesthetic technique that does not provide the novice with an overview ofthe perioperativeperiod and the commoneveryday problems faced by the anesthetist. Dr G. M. Woerlee of the University of Leiden with his book, "Com mon Perioperative Problems and the Anaesthetist," has filled a void in the current anes thetic literature. Dr Woerlee reviews in a straightforward, no-frills manner problems routinely encountered during the perioperative period. Other anesthesia textbooks do not cover the material in quite the same logical, step-by-step fashion."

Committed to providing safe anaesthetic care for paediatric patients, it is of paramount importance for clinicians to learn from suboptimal situations in order to continuously improve clinical performance. The first resource of its kind, this text analyses a selection of fascinating case studies and evaluates best practice in providing safe anaesthesia to children with recommendations on how to avoid the most common clinical pitfalls. Featuring over seventy chapters, topics include airway-related problems, vascular access, regional anaesthesia, medication related problems and the management of patients with pre-existing conditions. Each case study is supported by full colour images, making this essential reading for consultants and trainees in anaesthesia.

The diagnosis of cancer inspires fear, in part because of the high mortality rate associated with most malignancies, and in part because of the perception that cancer is a painful disease. Recently compiled statistics tend to support patients' fears. Pain is a major symptom in 70% of patients with advanced cancer [1]. Half of all patients undergoing anticancer therapy experience pain [2]. It has been estimated by members of the World Health Organization that 3. 5 million people worldwide suffer from cancer pain. One study of the severity of cancer pain estimates that pain is moderate to severe in 50% of cancer pain patients, very severe or excruciating in 30% [3]. An analysis of several reports of patients in developed countries estimates that 50-80% of patients had inadequate relief [2]. In underdeveloped countries, adequacy of treatment may be far lower because of lack of availability of medical facilities and legal constraints on the use of potent narcotics. The picture need not be this bleak. The reality is that, for most patients, cancer pain is relatively easy to control with simple, inexpensive measures. Several studies have indicated that cancer pain can be well controlled with oral morphine in over 90% of patients [4,5]. Long-acting orally effective opiate preparations such as time release morphine, methadone, and levorphanol allow patients to sleep comfortably through the night. When the oral route is impossible, narcotics can be administered rectally or by intravenous or subcutaneous infusion.

Prepare for success on in-training, certifying, and recertification exams! Anesthesia Review: Blasting the Boards is a high-yield study guide designed to maximize your study time and help you ace the written boards. A full-color, outline format features bulleted lists and numerous diagrams to facilitate quick memorization and information retrieval. It's an ideal review resource for residents, CRNAs preparing for certification, and practitioners who need to recertify.Key Features 22 succinct chapters cover the five content areas tested - basic sciences, clinical sciences, organ-based basic and clinical sciences, clinical subspecialties, and special problems or issues in anesthesiology. Content is presented in high-yield, digestible chunks using a full-color, outline format . Anesthesiology keywords are highlighted for quick memorization and retrieval. Recently identified knowledge gaps are addressed in each chapter. Every chapter concludes with five or more multiple choice questions and explanations . Now with the print edition, enjoy the bundled interactive eBook edition, which can be downloaded to your tablet and smartphone or accessed online and includes features like: Complete content with enhanced navigation Powerful search tools and smart navigation cross-links that pull results from content in the book, your notes, and even the web Cross-linked pages, references, and more for easy navigation Highlighting tool for easier reference of key content throughout the text Ability to take and share notes with friends and colleagues Quick reference tabbing to save your favorite content for future use

A panel of prominent clinician-scientists comprehensively reviews the latest developments in pediatric pain management, with special emphasis on the setting in which pain is detected and managed. The authors explore the cutting-edge of children's pain care in inpatient, outpatient, palliative care, school, and residential settings, and describe alternate approaches, including complementary and alternative medicine, pain management via the internet and information technology, and pain care in developing countries.

With the introduction of cardiac surgery more than five decades ago and the use of the heart-lung machine for open heart surgical procedures granting the surgeon unlimited time in which to operate inside the heart, a complex task has been given to the Perfusionist. With a pairing of a perfusionist and a surgeon for each chapter, this book is an essential collection of techniques and protocols to aid in decision making in the operating room.

Neurocritical care as a subspecialty has grown rapidly over the last two decades and has reached a level of distinct maturity with the advent of newer monitoring, diagnostic and therapeutic modalities in a variety of brain and spinal cord injury paradigms. Handbook of Neurocritical Care, Second Edition remains true to the operative tenet that "time is brain," and rapid diagnosis and therapeutic interventions in these challenging patients cannot be overemphasized. The second edition of this important Handbook again serves as a quick, practical reference for those involved in the care of critically ill neurological and neurosurgical patients. The care provided to this subset of critically ill patients continues to be multidisciplinary and includes care rendered from colleagues in emergency medical services, emergency medicine, neurology, neurosurgery, anesthesiology, critical care, nursing and physician assistance. Fully updated, all of the chapters again consist of easy-to-read, bulleted points followed by a list of Key Points and important references allowing for rapid access to vital information critical for fast and timely decision making. The first section covers a myriad of important general principles while the second section addresses the major diagnostic categories of neurocritical care with several new topics; these include, for example, neuroleptic malignant syndrome and malignant hyperthermia, meningitis and encephalitis, and intraventricular hemorrhage. Readers will find the algorithms, tables, and illustrations throughout the book not only useful but truly invaluable in facilitating fast and accurate decision making. Accessible and comprehensive, Handbook of Neurocritical Care, Second Edition again fills a vital need by providing readers with a succinct and practical approach to the management of critically ill neurological and neurosurgical patients.

The "Handbook of Clinical Anesthesia, Seventh Edition," closely parallels "Clinical Anesthesia, Seventh Edition," and presents the essential information found in the larger text in a concise, portable format. Extensive changes made to the parent textbook are reflected in the "Handbook"; chapters have been completely updated and a new chapter covering anesthesia for laparoscopic and robotic surgeries has been added.
The "Handbook" makes liberal use of tables and graphics to enhance rapid access to information. This comprehensive, pocket-sized reference guides you through virtually every aspect of perioperative, intraoperative, and postoperative patient care.Inside You'll Find...Step-by-step procedures to administer anesthesia for cardiac surgery, obstetric surgery, minimally invasive procedures, chronic pain management, and moreASA guidelines for patient care and safety includedRobust appendices include formulas, Atlas of Electrocardiography, Pacemaker and ICD Protocols, American Heart Association resuscitation protocols, ASA Standards and Guidelines, difficult airway algorithms, malignant hyperthermia protocol, and herbal medicationsA clear, consistent writing style that makes critical material easy to locate and comprehendNEW to "the Seventh Edition."..A new chapter covering Anesthesia for Laparoscopic and Robotic Surgeries has been addedTwo new appendices - Atlas of Electrocardiography and Pacemaker and Implantable Cardiac Defibrillator Protocols

Now in its fourth edition, Analgesia, Anaesthesia and Pregnancy is a concise guide to obstetric anaesthesia and analgesia. This essential text reviews every topic and clinical challenge faced during delivery and focuses on pre-empting problems and maximising quality of care. It also covers acute emergencies related to pregnancy. This new edition features eleven new chapters that cover the significant updates in the field over the last few years. Presented in a clearly structured format, this practical guide will be an invaluable source of key information for any anaesthetist encountering obstetric patients, whether they are a practised consultant or still in training. Obstetricians, neonatologists, midwives, nurses, and anaesthetic assistants in obstetric analgesia and anaesthesia who wish to extend or update their knowledge will also benefit from reading this book.

The accuracy with which clinicians can locate nerves and blood vessels has increased greatly with the development of portable handheld ultrasound scanners, and no specialty has felt the benefit more than anesthesia. This practical atlas of ultrasound anatomy addresses the two main challenges for anyone learning ultrasound-guided techniques: 1. Where do I place the probe? 2. What exactly am I looking at? Each nerve block or vascular access site is illustrated with: * An anatomical line illustration * A clinical photograph showing the correct ultrasound probe position * The ultrasound scan * A line illustration of the scan labelled to indicate the salient anatomical features All relevant anatomic regions are included: upper limb, lower limb, neck, thorax and abdomen. Concise notes for each entry indicate scan landmarks and give useful tips and advice on potential complications. Sonoanatomy for Anesthetists is an essential resource for anesthetists, intensivists and chronic pain specialists.

This volume is published under the auspices of the World Federation of Societies of Intensive Care Medicine, which consists of 48 members societies (both medical and nursing) - a truly world wide organisation - and whose aim is to promote excellence in the care of critically ill patients. The volume will be distributed to delegates on occasion of the 9th International Congress of the World Federation of Societies of Intensive and Critical Care Medicine, to be held in Buenos Aires at the end of August 2005.

The single best answer format of questions is invaluable in assessing a trainee's clinical skills and problem-solving abilities. It allows the trainee to demonstrate application of their knowledge to clinical practice. This book comprises six sets of practice papers. Each set contains 30 single best answer questions which cover topics including clinical anaesthesia, pain and intensive care. The questions are based on the recent changes introduced to the written part of the final FRCA examination. The best possible answer to a given clinical scenario is substantiated by a detailed explanation drawn from recent review articles and textbooks in clinical anaesthesia. These questions will enable candidates to assess their clinical knowledge and skills in problem-solving, data interpretation and decision making. This book is essential study material for candidates sitting postgraduate examinations in anaesthesia and intensive care medicine. It is not only an essential guide for trainees but also an invaluable educational resource for all anaesthetists.

What do anaesthetists do? How does anaesthesia work? What are the risks? And how does the anaesthetist know if you are really asleep? Anaesthesia is a mysterious and sometimes threatening process. In this Very Short Introduction, Aidan O'Donnell takes the reader on a tour through the whole of the modern anaesthetic practice. He begins by explaining general anaesthesia: what it is, how it is produced, and how it differs from natural sleep and other forms of unconsciousness. He goes on to consider the main categories of anaesthetic drugs, including anaesthetic vapours, intravenous agents, muscle relaxants, and analgesics, together with explanations of how they work and what their purpose is. Set against the historical background of anaesthetic and surgical practice, O'Donnell examines the large role anaesthetists play in specialised areas such as intensive care medicine, pain medicine, and childbirth; and finally, he considers the risks of anaesthesia, putting in to context that anaesthesia is a very safe process. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Le situazioni critiche in medicina d urgenza e in terapia intensiva rappresentano una tra le sfide piu difficili nella pratica clinica. La natura stessa dell ambiente di cura, l incertezza, il rischio elevato, i tempi ristretti e lo stress, rendono queste discipline particolarmente vulnerabili agli errori nella gestione dei pazienti. Nell ultimo decennio e diventato sempre piu evidente, che la capacita di erogare trattamenti sicuri in queste circostanze dipende da un approfondita conoscenza dei meccanismi all origine dell errore umano. Questo volume, che e la traduzione italiana della seconda edizione di Crisis Management in Acute Care Settings, propone una rassegna originale e completa di tutti i problemi correlati ai fattori umani, rilevanti per la sicurezza dei pazienti durante l erogazione di trattamenti urgenti. Le energie di medici e psicologi si sono mescolate in un testo facilmente accessibile, che aiutera i medici e altri professionisti della salute a comprendere meglio i principi del comportamento umano e del processo decisionale nelle situazioni critiche, per evitare errori e garantire un trattamento piu sicuro ai loro pazienti.

This work discusses the methodology and available evidence from systematic reviews on the current best practice in anaesthesia and analgesia. The first edition is built upon in this thoroughly revised and updated text. Contributions are from acknowledged world authorities on systematic review in the specialty. The free access website continues to provide added detail on the literature.

50 Studies Every Anesthesiologist Should Know presents key studies that have shaped the practice of anesthesiology. Selected using a rigorous methodology, the studies cover topics ranging from pain medicine, critical care, cardiothoracic anesthesiology to general anesthesiology. For each study, a concise summary is presented with an emphasis on the results and limitations of the study, and its implications for practice. Brief information on other relevant studies is provided, and an illustrative clinical case concludes the review. This book is a must-read for health care professionals in anesthesiology and pain medicine, and anyone who wants to learn more about the data behind clinical practice in anesthesiology, pain medicine, critical care and its broad subspecialties.

Anesthesiology Applied Exam Board Review is a comprehensive guide for preparing for the American Board of Anesthesiology Applied Exam, which includes the traditional Standardized Oral Examination (SOE) and a new Objective Structured Clinical Examination (OSCE) component. This guide is also a useful review for residents preparing for in-training examinations in Anesthesiology. The text contains over 40 long and short exam stems, with questions regarding the preoperative, intraoperative, and postoperative care. Included with the book is access to the questions online for an e-learning experience. Topics chosen are based on ABA-released exams and student feedback regarding what are the highest yielding topics for the oral board exam. Each chapter includes not just questions and answers based on ABA-provided grading criteria, but also an emphasis on how to formulate answers and break down complex topics and processes into simpler formats.

Selected as a Doody's Core Title for 2022! Apply the latest advances in regional anesthesia and acute pain medicine! Originally authored by Michael F. Mulroy, MD, this respected title has helped practitioners provide effective regional anesthesia for nearly 30 years. Now it has been retitled A Practical Approach to Regional Anesthesiology and Acute Pain Medicine to reflect the Accreditation Council for Graduate Medical Education's recent establishment of Regional Anesthesiology and Acute Pain Medicine as an anesthesiology fellowship. This clinical reference has evolved with the many changes in this subspecialty to continue bringing you the up-to-date, clinically focused, hands-on guidance you need to offer your patients the best possible care. Master the latest advances in the field with expanded coverage of truncal blocks, systems-based practice, acute pain medicine, and much more. Make optimal use of ultrasound guidance as a nerve localization tool for peripheral nerve blocks, thanks to updated and expanded coverage as well as many new and improved illustrations. The techniques, approaches, and systems-based practices covered in 5th edition will enhance the application and role of regional anesthesia in Enhanced Recovery After Surgery (ERAS) pathways and the perioperative surgical home. Easily find and apply the answers you need thanks to a highly readable, focused, richly illustrated format that provides balanced discussions of indications, complications, and techniques. Your book purchase includes a complimentary download of the enhanced eBook for iOS, Android, PC & Mac. Take advantage of these practical features that will improve your eBook experience: The ability to download the eBook on multiple devices at one time - providing a seamless reading experience online or offline Powerful search tools and smart navigation cross-links that allow you to search within this book, or across your entire library of VitalSource eBooks Multiple viewing options that enable you to scale images and text to any size without losing page clarity as well as responsive design The ability to highlight text and add notes with one click See the inside front cover to find out how to access your eBook! 3 Stars from Doody's Review Service! " With a focus on perioperative blocks, the book is full of practical tips and has a very useful focus on the anatomy of each block... The book is quite handy in providing a quick refresher course for anesthesiologists and trainees in busy practices." - Doody's Review Service

Audit was a buzz word of the late '80s and early '90s, but in anaesthetic practice the important issues are quality of service and safety of the patient and audit is used to monitor and agree standards for these two.
With contributions from leading figures in anaesthetic audit, "Quality and Safety in Anaesthesia" describes the important work already done and addresses vital aspects such as risk management, resource management, standards and postgraduate training, critical incidents and human error, use of computers, design of equipment for safety and managing a department of anaesthesia.
This book relates the process of quality assurance to the drive to improve the quality of anaesthetic practice. It should be useful for all those working or thinking about working in anaesthetic departments, and will be revealing to all those with an interest in quality and audit.

Tiel I Grundlangen.- 1 Historische Einfuhrung.- 2 Spezielle Anatomie des Halses und der oberen Atemwege.- 3 Erkennen eines schwierigen Atemwegs.- 4 UEberwachung der Sicherung freier - Atemwege Monitoring.- Tiel II Klinisches Atemwegsmanagement.- 5 Algorithmus.- 5.1 Einfuhrung.- 5.2 Mainzer Algorithmus zur Atemwegssicherung wahrend klinischer Anasthesie.- 5.3 The New Haven Algorithm for the Evaluation of the "Unknown" Airway.- 6 Standardsituationen des erwartet schwierigen Atemwegs.- 6.1 Halswirbelsaulenpathologien und Atemwegsmanagement.- 6.2 Der schwierige Atemweg in der Mund-Kiefer-Gesichtschirurgie - Anatomie und haufige Krankheitsbilder.- 6.3 Fremdkoerperaspiration.- 6.4 Klinisches Atemwegsmanagement - Besonderheiten im Kindesalter.- 6.5 Grundlagen, Indikation und Durchfuhrung der Ein-Lungen-Ventilation.- 7 Der unerwartet schwierige Atemweg.- 7.1 Allgemeine Grundlagen.- 7.2 Algorithmen, Richtlinien, Empfehlungen.- 7.3 Apnoische Oxygenierung.- Tiel III Praklinisches Atemwegsmanagement.- 8 Philosophie und Konzept.- 9 Algorithmus - Praklinisches Atemwegsmanagement.- 10 Vorgehen bei speziellen Verletzungsmustern und Krankheitsbildern.- 10.1 Atemwegsmanagement bei Schadel-Hirn-Trauma, Halsverletzungen und beim Einklemmungstrauma.- 10.2 Anaphylaxie, Veratzungen, Verbrennungen.- 10.3 Atemwegsobstruktion, Fremdkoerperaspiration.- 11 Besonderheiten im Kindesalter: Krupp/Pseudokrupp, Epiglottitis.- Tiel IV Besonders empfohlene Techniken und Instrumente.- 12 Notfallbeatmung mit einfachen Hilfsmitteln.- 13 Endotracheale Intubation.- 13.1 Allgemeine Grundlagen.- 13.2 Laryngoskope und Intubationsspatel.- 13.3 Intubation Techniques for Unanticipated Difficult Direct Laryngoscopy: Stylets and Introducers.- 13.4 Starre Tracheoskope/Bronchoskope ("Notrohr").- 13.5 Intubationsfiberskope.- 13.5.1 Flexible Intubationsfiberskope.- 13.5.2 Starre Intubationsfiberskope.- 13.5.3 Fiberoptische Intubation - Wiederaufbereitung.- 13.6 Endotrachealtuben.- 14 Alternative Techniken und Instrurnente.- 14.1 Larynxmaske.- 14.2 Intubationslarynxmaske.- 14.3 Larynxtubus.- 14.4 Combitube - OEsophagotrachealer Doppellumentubus.- 14.5 EasyTube.- 14.6 Jet-Ventilation/tracheale Sauerstoffinsufflation.- 15 Chirurgischer Zugang zum schwierigen Atemweg.- V Qualitatsmanagement, Ausbildung und Training.- 16 Qualitatsmanagernent und Dokumentation.- 17 Ausbildung und Training.- 17.1 Ziele/Zielgruppen.- 17.2 Atemwegsmanagement-Training an der Klinik fur Anasthesiologie des Klinikums der Johannes Gutenberg-Universitat Mainz.- 17.3 Airway Education.- VI Ausblick und Zukunftsperspektiven.- 18 Intubationsfiberskope (starr/flexibel) fur die Praklinik.- 19 Videolaryngoscopy.- 20 Fiberendoskope fur die Neonatologie.

Principles of Anaesthesia Equipment provides guidance on the safe use of a wide range of anaesthesia apparatus, edited by recognised experts based in Boston, USA and the University of the West Indies, Barbados. Divided into thirteen chapters, the book begins with the applied physics of anaesthesia equipment, before covering individual instruments and groups of instruments by chapter. Equipment covered includes anaesthesia machines and work stations, anaesthesia breathing systems, equipment for endotracheal intubation, electrocautery and lasers, equipment for regional anaesthesia, and ultrasound equipment for neuraxial blocks. The final chapter covers the use of simulators in anaesthesia training. Safety tips are included in chapters on pre-use checks of anaesthetic equipment, electrical safety, disinfection and sterilisation. A separate chapter on monitoring features capnography and state-of-the-art cardiac output monitors. Enhanced by 85 full colour illustrations, Principles of Anaesthesia Equipment is an essential resource for anaesthetists and anaesthesia trainees. Key Points Comprehensive guide to the safe use of a range of anaesthesia equipment Recognised editorial team from Brigham and Women's Hospital, Boston, USA and University of West Indies 85 full colour illustrations

Selected as a Doody's Core Title for 2022! Designed for rapid reference at the point of care, Manual of Clinical Anesthesiology is the clinician's go-to resource for practical, clinically focused information on all aspects of anesthesia management. The comprehensive second edition consolidates multidisciplinary expertise in one resource, offering revised and updated content in a highly visual, portable format, with short, easy-to-read chapters, margin icons noting pearls and pitfalls, and more. Presents information in a rapid-reference, outline format throughout, with color-coded sections, chapter summaries, pearls and pitfalls, cross-references to related text, and more. Features new chapters on: Hemorrhage in Obstetrics, Highly Lethal Viruses (such as SARS and Ebola), Thromboelastogram/Point of Care Laboratory Interpretation, Hazards in the MRI Suite, and Substance Abuse in Medical Professionals, as well as new cognitive aids for Caudal Anesthesia, Cardiopulmonary Bypass, Ultrasound-Guided Neuraxial Anesthesia, OB Cardiac Arrest, Transthoracic Echo, and PALS. Covers monitoring, equipment and procedures, anesthesia and comorbid diseases, pediatric anesthesia, subspecialty anesthesia, and other key topics. Includes four full-color atlases that clearly depict procedures, transesophageal echocardiography, peripheral nerve blocks, and crisis management (including new crisis management checklists) as well as a drug dosing pull-out card. Enrich Your Ebook Reading Experience Read directly on your preferred device(s),such as computer, tablet, or smartphone. Easily convert to audiobook,powering your content with natural language text-to-speech.