Anaesthesiology is one of the most technologically advanced and patient safety oriented medical specialties where technical skills, clinical decision making, communication, team work and crisis management skills are all important. For decades anaesthesia education has been greatly enhanced by traditional apprenticeship training, the "see one, do one, teach one" method. But as more emphasis has been put on patient safety, less time spent in clinical practice, ethical issues of trainee involvement in high-risk procedures, work hour restrictions and the move towards competency-based medical education (CBME), new and creative approaches to learning and teaching medicine have become increasingly important.¹–⁴ Simulation-based education (SBE) has proven itself as an effective solution to replicate real-life clinical scenarios in a safe, controlled and risk-free environment where learners can learn, practice and develop both technical and non-technical skills without compromising patient outcomes. Simulations support mastery learning and the transfer of knowledge into practice through deliberate practice, structured de-briefing, immediate feedback and objective performance evaluation of the learner's performance.⁵–⁷ The idea for medical simulation was modelled on the aviation industry, where simulation has long been an effective tool for enhancing safety, enabling pilots to practice rarely occurring but potentially deadly emergencies. Subsequently similar principles have been followed in anaesthesiology due to the dynamic scenario, rapid decision making and risky clinical situations in this specialty. Simulation has come a long way since the late twentieth century when patient simulators with computer control were first introduced, and now involves using sophisticated, high fidelity, patient simulators to simulate realistic physiological responses to anaesthetic drugs, surgical stimuli and perioperative emergencies.⁸ The various types of simulation encompassed by the term ‘modern' also span across a wide range of educational modalities such as low fidelity, medium fidelity, high fidelity simulators, standardized patients, virtual reality, augmented reality, mixed reality, screen-based simulation, serious gaming, telesimulation, and artificial intelligence-assisted learning systems. A number of these technologies can help support competency-based education by allowing for repeated practice, standardized assessment, individual feedback, and cross-training with multidisciplinary teams.⁹ There are increasing studies showing that simulation leads to better procedural skills, airway management, crisis resource management, communication, leadership, team work and following evidence based clinical guidelines. In addition, simulation is being used increasingly to recognize hidden risks to safety assess institutional readiness and improve efforts in quality improvement in the field of perioperative medicine.¹⁰ The present article offers a detailed perspective on the historical background, educational theories, and training methods behind simulation and their use in anaesthesiology, along with the evidence, advancement, and challenges in simulation education and the future outlook of this field.

A literature search was performed using Pub Med/MEDLINE, Embase, Scopus and Google scholar to identifying relevant articles on simulation-based education in anaesthesiology. The studies from 2004 to June2026 were considered. The keywords used for the search were: simulation-based education, Airway Management, Artificial Intelligence, High fidelity Simulation, anaesthesiology, Regional anaesthesia by ultrasound and green anaesthesia and opioid free anaesthesia respectively, and management of crisis, and cohort studies should be considered. Appropriate clinical guidelines, systematic reviews and meta-analyses, RCTs, and cohort studies should be taken into account. English language articles, trials and observational studies were included. To gain insight into the current situation selected literature reviewed was summarized to give an overview. Use of simulation in the teaching and learning of anaesthesiology, current challenges, recommendation and future developments, Development of simulation in anaesthesiology. Simulation in anaesthesiology has progressed from the mechanical models to the systems that can be controlled by computers, which are able to mimic physiologic responses and elaborate perioperative scenarios. Anaesthesiology is one of the first medical specialties to use simulation due to its focus on patient safety, quick decisions, crises management and procedural skills.¹¹ Medical simulation, which was borrowed from the aviation arena, has been used for a long time to prepare pilots for the rarer, but potentially more dangerous scenarios, without risking a person's life. Anaesthesiologists pioneered the use of simulation in clinical education in the late twentieth century, as they realized that much of it was similar to airline operations: human factors, team work, communication, situational awareness and safety-critical decision making.¹² The first (and still widely used) simulations were created in the 1960s for training CPR. In the 1980s and 1990s, the advent of new technologies resulted in high fidelity patient simulators being developed that were able to simulate cardiovascular, respiratory, neurological and pharmacological responses to anaesthetic interventions. These innovations allowed the trainees to practice the management of uncommon, but lifesaving, perioperative emergencies repeatedly with safety and control.¹³ One of the landmark milestones was the adaptation of the principles of aviation Crew Resource Management to anaesthesiology by Gaba and colleagues with the introduction of Anaesthesia Crisis Resource Management (ACRM). ACRM highlighted leadership, good communication, work sharing, situational awareness, resource management, decision making and debriefing in an orderly fashion during surgical emergencies. These principles are still fundamental to the present day simulation based training and learning worldwide.¹⁴ During the last twenty years, simulation has emerged as a tool not only in residency training but also in undergraduate medical education, fellowships, continuous professional development and maintenance of certification, multidisciplinary team training, and hospital quality improvement. Now, many institutions use in-situ simulation as a tool to uncover the hidden hazards that could jeopardize the safety of their clinical workflows, their readiness, their clinical protocol, and interprofessional collaboration.¹⁵ In recent years, with the development of technology, simulation has proved to be a smart platform for education. Nowadays, Virtual Reality (VR), Augmented Reality (AR), Mixed Reality (MR), Artificial Intelligence (AI), machine learning, digital twins, and telesimulation offer personalized learning experiences and high engagement through an immersive approach and a competency-based strategy. These innovations are likely to influence the future of anaesthesiology education and enable objective performance assessment, adaptive learning pathways, remote learning and lifelong learning.¹⁶ Educational Theories Supporting Simulation-Based Learning Simulation-based education (SBE) is based on proper education theories which explain how learners are able to acquire, retain and apply their knowledge and skills to practice in clinical environment. These theories underpin the science of simulation curriculum design, deliberate practice, structured debriefing, competency assessment and lifelong learning in the field of anaesthesiology. Experiential Learning Theory Knowledge is acquired during learning that comes about through a continuous loop between concrete experience, reflective observation, abstract conceptualization, and active experimentation (the Kolb's Experiential Learning Theory). Through simulation learners are able to take part in real-life clinical scenarios, and during the debriefing reflect and discuss their performance, apply new ideas to their own current and previous knowledge and skills, and prepare for the next. The knowledge retention, critical thinking and clinical decision making is strengthened through an iterative learning process.¹⁷ Deliberate Practice To improve, Ericsson's theory of deliberate practice suggests that one needs to repeatedly practice a clearly-defined task, receive feedback, be corrected, and gradually increase in difficulty until one master the task. In simulation, learners have the opportunity to practise procedures or scenarios repeatedly, including airway, vascular access, neuraxialanaesthesia, and ultrasound guided regional anaesthetic, without jeopardising patient. A repeated supervised practice enhances the technical competency, confidence and retention of skills.18 Adult Learning Theory Knowles' Adult Learning Theory acknowledges that adult learners are autonomous, action-oriented and desire to learn what is clinically relevant. Simulation uses simulated clinical scenarios to actively involve learners and to stimulate reflections, self-learning and direct application of newly learned information to patients.¹⁹ Cognitive Load Theory Cognitive Load Theory holds that it is crucial to minimize unproductive cognitive load whist maximizing productive cognitive load through instructional design to optimize learning. The level of experience of the learner should therefore be taken into account in the simulation scenarios, stepping up the complexity as the competence is gained. Structured de-briefing adds to that by recapping the important learning points and promoting reflective practice.²⁰ Constructivist Learning Theory Constructivist Learning Theory suggests learners construct knowledge, instead of passively receiving it, through interaction with their environment. Through simulation, participants can combine what they have learned in their past clinical experiences with what they have encountered in the simulation, enhancing clinical reasoning, decision making, team work and problem solving.21 Medical education is currently steering toward a mastery learning approach. Medical education is shifting towards competency-based learning. These days competency-based medical education (CBME) has taken the shape of Mastery learning. Our learners will be expected to attain specific standards of competency prior to moving onto more advanced clinical roles. By simulating learning, standardized assessment, repeated practice, objective feedback and progression based on performance are possible, and mastery learning can be achieved. This helps to minimize the variation in training and to enhance patient safety and quality of care.²² Types of Simulation There are different types of simulation used within the field of anaesthesiology, with differing educational goals, technology and fidelity, and costs. The choice of modality will vary depending on the learner's background, competency needs and on the institutional resources. From an educational point of view, a blended approach, combining various simulation techniques, is most beneficial and it helps to promote competency based medical education.²³ Low-Fidelity Simulation Low fidelity simulators are basic anatomical models and task trainers which are mainly used for repetitive learning of basic procedure skills. Airway Mannequins, IV Cannula Insertion Arms, Spinal/Epidural Models, Central Venous Catheter Insertion Trainers, and CPR Mannequins are some of the examples. These simulators are low cost, easy to move around and have very little maintenance, and they are of great value to the novice in training in developing psychomotor skills prior to dealing with patients.²⁴ Medium-Fidelity Simulation Medium fidelity simulators are meant to replicate certain physiology, such as simple respiratory mechanics, pulses, breath sounds, electrocardiographic rhythms, and heart sounds. They promote the procedural skills and clinical decision making and are often employed for monitoring, basic life support, advanced cardiac life support and anaesthetic management of common clinical scenarios. They are relatively inexpensive, thus being suitable for institutions with limited simulation resources.²⁵ High-Fidelity Simulation High fidelity simulation is considered to be the best accepted method of anaesthetic education. The computer-controlled mannequin is capable of simulating human cardiovascular, respiratory, neurology and pharmacology responses to anaesthetic drugs and airway procedures, as well as haemorrhage, arrhythmias and cardiopulmonary resuscitation. They allow for realistic simulation of complex peri-operative scenarios and provide a way to objectively review, debrief and train in crisis resource management with these simulators. High fidelity simulation has proven to consistently improve technical skill, teamwork, communication and patient safety.²⁶ Standardized Patients Standardized patients are screened individuals who are trained to consistently act out specific clinical conditions and/or communication situations. They can be especially applied to pre-anaesthetic evaluation, informed consent, communication with patients and relatives, professionalism, empathy, breaking bad news and shared decision making. SPEs add to mannequin-based simulation and further develop interpersonal and behavioural skills.²⁷ Virtual Reality, Augmented Reality and Mixed Reality Virtual reality (VR), augmented reality (AR) and mixed reality (MR) are fast developing simulation technologies in anaesthesiology. These are an immersive platform that enables realistic 3D environments for fibre optic intubation, video laryngoscopy, ultrasound guided regional anaesthesia, vascular access, bronchoscopy and crisis management. They provide repeatable, learner focused training, objectively scored with instant feedback. Over the next few years, it is anticipated that increasingly AI and simulation techniques will be integrated, allowing for a more personalized approach to learning and competency measurement.²⁸ Table. Types of Simulation Type Characteristics Common Uses Low fidelity Static models Airway practice, IV cannulation, spinal anesthesia Medium fidelity Partial physiological responses Basic anesthesia scenarios High fidelity Computer-controlled mannequins Crisis management, advanced anesthesia Task trainers Procedure-specific Central venous access, epidural, nerve block Standardized pts Human actors Communication, consent, professionalism Hybrid simulation Combines multiple modalities OSCE, multidisciplinary training Virtual Reality Immersive digital environment Airway, bronchoscopy, ultrasound Augmented Reality Digital overlay on real world Ultrasound-guided procedures Mixed Reality Physical + virtual interaction Advanced procedural simulation Telesimulation Remote simulation Distance education

Clinical Applications of Simulation-Based Education in Anaesthesiology Airway Management Airway management is one of the most important skills in anaesthesiology and is a recognized area of much research with simulation-based education. Difficult airway events are uncommon, but potentially life-threatening and simulation allows trainees to repeatedly practice technical skills, clinical decision making and crisis resource management without harming patients.²⁹ Comprehensive pre-operative airway assessment should be the initial step towards modern airway simulation. Learners should be taught to perform and interpret Modified Mallampati classification, Upper Lip Bite Test, thyromental distance, sternomental distance, inter-incisor distance (mouth opening), neck mobility, neck circumference, neck circumference-to-thyromental distance ratio and airway ultrasonography. Instead of using one predictor, the focus of simulation should be the combination of many clinical findings for a structured airway risk assessment.³⁰ Bag-mask ventilation, insertion of airway devices, direct laryngoscopy and videolaryngoscopy, flexible bronchoscope guided tracheal intubation, awake tracheal intubation, rapid sequence induction, paediatric airway management and emergency front of neck access (FONA) for cannot intubate cannot oxygenate (CICO) situations should be taught through simulation. High fidelity simulators provide the opportunity to repeatedly practice airway oedema, aspiration, laryngospasm, bronchospasm, obesity, maxillofacial trauma, cervical spine immobilization and other scenarios of challenging airways, and reinforce evidence based difficult airway algorithms.³¹ Structured de-briefing post airway simulation enhances both technical and non-technical skills such as leadership, communication, teamwork, situational awareness, workload management and crisis resource management. Recent developments are being made using virtual reality, augmented reality, artificial intelligence-assisted performance analysis, and telesimulation, which allow objective feedback and individualized learning pathways and thus enable the assessment based on competencies. Combining the ASA Difficult Airway Guidelines and the guidelines presented by the Difficult Airway Society (DAS) with simulation-based training results in better adherence to guidelines and improved first-pass intubation success with more confidence for dealing with rare airway emergencies.³² The recent literature reflecting advanced airway education through simulation is also a testament to the growing use of simulation in airway management, which includes evidence-based airway management strategies, and structured airway assessment and the use of emerging technologies. These principles can be integrated into simulation training and further enhance competency-based medical education to ultimately improve perioperative patient safety.³³ Simulation based training for “green” anaesthesia. There is a growing focus in the modern practice on environmental sustainability and simulation based education is an effective medium for teaching the ideas of green anaesthesia. Simulation can help anaesthesiologists reduce their environmental footprint in their clinical practice without compromising the safety and quality of patient care based on evidence.³⁴ Simulation scenarios can include low-flow anaesthesia, optimised fresh anaesthetic gas usage etc., using anaesthetic techniques and agents with reduced environmental impact, minimising the use of volatile anaesthetic gasses, minimising the use of nitrous oxide, rational use of single use consumables, biomedical waste segregation, recycling strategies etc., and energy efficient operating room practices. Learners can also join in the multidisciplinary exercises on sustainable operating theatre management, on carbon footprint and on environmentally responsible use of resources.³⁵ Structured simulation sessions enhance behavioural change that requires a blend of technical training, crisis management, teamwork, and communication and quality improvement projects. Debriefing enables participants to consider how they did both clinically and environmentally, and to make sustainable choices without affecting patient care. With the growing focus on the practice of health care in an environment-friendly way, Green Anaesthesia in simulation programs improves the competencies-based learning model and contributes to the Global Sustainability Movement.³⁶ Opioid-Sparing / Opioid-Free Anaesthesia - Simulation Based Training Simulation-based education also plays an important role in training anaesthesiologists in contemporary perioperative pain management strategies, including opioid-sparing and opioid-free anaesthesia. High-fidelity simulation allows learners to practise multimodal analgesia, optimize the use of non-opioid analgesics, perform regional anaesthesia techniques, recognize analgesia-related adverse events, and make evidence-based intraoperative decisions in a risk-free environment.³⁷ Simulation scenarios should include the use of paracetamol, non-steroidal anti-inflammatory drugs, ketamine, dexmedetomidine, lidocaine infusion, magnesium sulphate, regional anaesthesia, fascial plane blocks, and enhanced recovery after surgery (ERAS) protocols. Learners should also be trained to recognize opioid-induced respiratory depression, postoperative nausea and vomiting, delayed recovery, opioid tolerance, and opioid-induced hyperalgesia. These structured exercises improve clinical confidence, teamwork, communication, and adherence to ERAS pathways while reducing unnecessary perioperative opioid exposure.³⁸ Opioid-sparing and opioid-free anaesthetic modules teach the simulation of anaesthetic approaches that allow for safe and effective implementation of individualized multimodal analgesic strategies. Integrating these new concepts in simulation-based education into simulation curriculae supports competency-based education, patient safety, and evidence-based care during surgery.³⁹ Regional Anaesthesia Simulation has now become a crucial part of training in ultrasound guided regional anaesthesia with trainees learning psychomotor skills prior to the patient before undertaking anaesthetic interventions. The use of task trainers, gel phantoms, cadaveric models, virtual simulators, and high fidelity ultrasound simulators promote skill with probe handling, ability to visualize the needle, hand-eye coordination, sonoanatomy recognition, and safe needle advancement.40 The simulation curricula should cover the brachial plexus, femoral and sciatic nerve blocks, fascial plane blocks (TAP, ESP, PECS), neuraxial techniques, peripheral nerve catheter placement and complications including local anaesthetic systemic toxicity (LAST), intravascular injection, nerve injury and high spinal anaesthesia. Repeatedly practice through simulation to increase the accuracy of the procedure, confidence of the learner, success on the first attempt, and patient safety. Obstetric Anaesthesia Multidisciplinary team training through simulation is a critical step in preparing the team for an infrequent, yet life-threatening obstetric emergency. High fidelity scenarios enhance communication, leadership, situational awareness and compliance with emergency instructions. Some of the most common simulation scenarios are: Failed obstetric airway High spinal block Massive postpartum haemorrhage Amniotic fluid embolism Eclampsia Maternal cardiac arrest Perimortem caesarean delivery Systemic effects of local anaesthetic: Consistent multidisciplinary simulations with anaesthesiologists, obstetricians, neonatologists, nurses and operating-room staff will not only help to improve maternal and neonatal outcomes, but also enhance crisis resource management.⁴¹ PaediatricAnaesthesia PaediatricAnaesthesia has specific physiological issues and relatively uncommon, but potentially dangerous, emergencies. Simulation can be used for repeated practice of challenging paediatric airway management, laryngospasm, bronchospasm, malignant hyperthermia, congenital heart disease, neonatal resuscitation, paediatric cardiac arrest and perioperative anaphylaxis. Before independent clinical practice, repeated exposure leads to boost in confidence, drug-dose calculation, selection of equipment, and effectiveness of the team.⁴² Trauma Anaesthesia Special emphasis is placed on Advanced Trauma Life Support (ATLS) and on perioperative crisis management, creating a simulation-based trauma training environment. Improvements in rapid decision making, teamwork and communication, between anaesthesiologists, trauma surgeons, emergency physicians and critical care teams within a high fidelity trauma scenario of polytrauma, traumatic brain injury, haemorrhagic shock, tension pneumothorax, penetrating chest trauma and massive transfusion protocols. Intensive Care and Crisis Resource Management: There is growing use of simulation in intensive care education for training in mechanical ventilation, septic shock, extracorporeal membrane oxygenation (ECMO), renal replacement therapy, bronchoscopy, vascular access and communicating with families. The interprofessional simulation enhances the teamwork of intensivists, anaesthesiologists, nurses, respiratory therapists and pharmacists. Crisis Resource Management (CRM) is one of the biggest gifts of simulation to anaesthesiology, and was adapted from aviation Crew Resource Management. Concentrating on leadership, communication, situational awareness, task prioritization, workload distribution, resource utilization, and anticipating future events during a rapidly changing and evolving perioperative crisis is the emphasis of CRM. Structured de-briefing is an important part of simulation and helps to reinforce these non-technical skills and to help contribute significantly to patient safety.⁴³ In-situ Simulation and Quality Improvement. In-situ simulation takes place in the real world environment such as operation theatres, intensive care units, emergency departments and post-anaesthetic care units etc. It allows institutions to discover hidden areas of potential safety risks and determine readiness for emergencies, optimise clinical processes, check equipment and enhance multidisciplinary collaboration. As a result, in-situ simulation has emerged as a critical quality enhancement strategy supporting patient safety and resilience of the organization.44 Artificial Intelligence, Emerging Technologies, Current Evidence, Future Directions, Recommendation, Conclusion Artificial Intelligence & Emerging Technologies The use of artificial intelligence (AI) is revolutionizing simulation-based learning in anaesthesiology, providing for adaptive learning, automated competency assessment, intelligent tutoring systems, and personalized feedback. AI-powered simulation platforms can provide objective assessments of procedural skills, evidence-based clinical practice, communication, collaboration, and decision-making, unlike traditional simulation methods which are based mostly on the main observation of the trainer. AI-assisted simulation is now recognized as a crucial trajectory for anaesthesia education and is vital for competency-based medical education, enabling learners to advance based on demonstrated competence instead of training duration.⁴⁵ Virtual reality (VR), augmented reality (AR), mixed reality (MR), digital twins and telesimulation further help to broaden educational opportunities by opening up immersive and interactive learning scenarios. Such technologies enhance procedural training in challenging airway management, FOB, ultrasound-guided regional anaesthesia, vascular access, perioperative crisis management and intensive care medicine, and can be used for repeated practice without risk for the patients46. Current Evidence Recent systematic reviews and narrative reviews all conclude that simulation-based education has a positive impact on the development of technical skills, non-technical skills, communication, leadership, team work, clinical reasoning and evidence-based protocols. However, structured de-briefing continues to be the mainstay of good simulation and is essential for reflective learning and retention of knowledge. Modern literature also indicates that AI and immersive technologies can be integrated into simulation courses for the objective evaluation of its results and implementation of individualization. Future Directions AI-assisted competency assessment, machine learning, predictive learning analytics, multilingual virtual tutors, digital twins, robotics, wearable technologies, cloud-based learning platforms and remote telesimulation are anticipated to be included in future simulation programs. Portable simulators and cloud-based education systems may help to enhance access to good simulation in LMIC. Joint initiatives of academic institutions and professional societies from different parts of the world will help to standardise curricula, develop faculty and conduct educational research across multiple centres and spread best practice around the world. Recommendations 1. Integrate simulation-based training as a mandatory component of anaesthesiology residency and continuing medical education. 2. Conduct regular multidisciplinary simulation sessions involving anaesthesiologists, surgeons, nurses, and critical care teams. 3. Include high-fidelity simulation for difficult airway management, cardiac arrest, trauma, and perioperative crisis management. 4. Incorporate simulation training for ultrasound-guided regional anaesthesia and vascular access. 5. Train clinicians in opioid-sparing and opioid-free anaesthesia using simulation-based clinical scenarios. 6. Introduce green anaesthesia principles through simulation to promote environmentally sustainable perioperative practice. 7. Emphasize non-technical skills, including communication, leadership, teamwork, and decision-making. 8. Use structured debriefing after every simulation session to enhance learning and reflective practice. 9. Assess competency using validated simulation-based assessment tools before independent clinical practice. 10. Encourage multicentre research to evaluate the long-term impact of simulation training on patient safety and clinical outcomes.

With the incorporation of technical skills, non-technical competencies, patient safety principles and competency-based assessment in a structured educational framework, simulation-based education has become an integral part of modern anaesthesiology education. High fidelity simulation, immersive technologies, artificial intelligence and telesimulation are constantly changing how anaesthesiologists learn and retain clinical skills. There is currently evidence that supports the use of simulation as an effective method to enhance procedural skills, teamwork, communication, leadership, crisis management and patient safety. Therefore it is recommended that structured simulation curricula at all levels be incorporated in undergraduate teaching, postgraduate residency training, continuing professional development and quality improvement programmes, which will guarantee safe, effective, evidence-based and sustainable care during peri-operative period.

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