A Lesson on Human Factors in Airway Management Learnt From the Death of George Washington.

On December 14, 1799, 3 prominent physicians-Craik, Brown, and Dick-gathered to examine America's first president, George Washington. He was complaining of severe throat symptoms and was being treated with bloodletting, blistering, and enemas. Dick advised performing an immediate tracheotomy to secure the airway. Both Craik and Brown were not keen on trying tracheotomy and overruled that proposal. Washington was not involved in making that decision. He most likely had acute epiglottitis that proved to be fatal at the end. If Dick had prevailed, a tracheotomy could have saved Washington's life. Human factors analysis of these events shows that his physicians were totally fixated on repeating futile treatments and could not comprehend the need for a radical alternative, like tracheotomy. That was aggravated by an impaired situational awareness and significant resistance to change. Leadership model was also based on hierarchy instead of competency, which might have also contributed to Washington's death.

An Anesthesiologist's Perspective on the History of Basic Airway Management: The "Modern" Era, 1960 to Present.

This fourth and last installment of my history of basic airway management discusses the current (i.e., "modern") era of anesthesia and resuscitation, from 1960 to the present. These years were notable for the implementation of intermittent positive pressure ventilation inside and outside the operating room. Basic airway management in cardiopulmonary resuscitation (i.e., expired air ventilation) was de-emphasized, as the "A-B-C" (airway-breathing-circulation) protocol was replaced with the "C-A-B" (circulation-airway-breathing) intervention sequence. Basic airway management in the operating room (i.e., face-mask ventilation) lost its predominant position to advanced airway management, as balanced anesthesia replaced inhalation anesthesia. The one-hand, generic face-mask ventilation technique was inherited from the progressive era. In the new context of providing intermittent positive pressure ventilation, the generic technique generated an underpowered grip with a less effective seal and an unspecified airway maneuver. The significant advancement that had been made in understanding the pathophysiology of upper airway obstruction was thus poorly translated into practice. In contrast to consistent progress in advanced airway management, progress in basic airway techniques and devices stagnated.

Sharing the Airway: The Importance of Good Communication Between Anesthesiologist and Surgeon.

One of the most challenging tasks during airway surgery is ensuring adequate ventilation throughout the procedure. Because the airway is shared between surgeon and anesthesiologist, successful oxygenation and ventilation of the patient can only be accomplished through close collaboration during the various stages of the procedure. This includes periods in which surgical airway manipulation compromises adequate ventilation and periods in which ventilation interferes with the surgical environment. With continuous communication between surgeon and anesthesiologist, optimal outcomes can be achieved.

An Anesthesiologist's Perspective on the History of Basic Airway Management: The "Progressive" Era, 1904 to 1960.

This third installment of the history of basic airway management discusses the transitional-"progressive"-years of anesthesia from 1904 to 1960. During these 56 yr, airway management was provided primarily by basic techniques with or without the use of a face mask. Airway maneuvers were inherited from the artisanal era: head extension and mandibular advancement. The most common maneuver was head extension, also used in bronchoscopy and laryngoscopy. Basic airway management success was essential for traditional inhalation anesthesia (ether, chloroform) and for the use of the new anesthetic agents (cyclopropane, halothane) and intravenous drugs (thiopental, curare, succinylcholine). By the end of the era, the superiority of intermittent positive pressure ventilation to spontaneous ventilation in anesthesia and negative pressure ventilation in resuscitation had been demonstrated and accepted, and the implementation of endotracheal intubation as a routine technique was underway.

An Anesthesiologist's Perspective on the History of Basic Airway Management: The "Artisanal Anesthetic" Era: 1846 to 1904.

This second installment of the history of basic airway management covers the early-artisanal-years of anesthesia from 1846 to 1904. Anesthesia was invented and practiced as a supporting specialty in the context of great surgical and medical advances. The current-day anesthesia provider tends to equate the history of airway management with the history of intubation, but for the first 58 yr after the introduction of ether anesthesia, airway management was provided by basic airway techniques with or without the use of a face mask. The jaw thrust and chin lift were described in the artisanal years and used primarily with inhalation anesthesia in the spontaneously breathing patient and less often with negative-pressure ventilation in the apneic victim. Positive-pressure ventilation and intubation stayed at the fringes of medical practice, and airway techniques and devices were developed by trial and error. At the beginning of the 20th century, airway management and anesthetic techniques lagged behind surgical requirements.

VISUALIZATION OF AIRWAY.

The author provides an overview of the history of optical instruments for airway management in anesthesiology. It systematically demonstrates the development of laryngoscope down to the present time when video laryngoscope has been introduced in clinical practice.

An Anesthesiologist's Perspective on the History of Basic Airway Management: The "Preanesthetic" Era-1700 to 1846.

Basic airway management modern history starts in the early 18th century in the context of resuscitation of the apparently dead. History saw the rise and fall of the mouth-to-mouth and then of the instrumental positive-pressure ventilation generated by bellows. Pulmonary ventilation had a secondary role to external and internal organ stimulation in resuscitation of the apparently dead. Airway access for the extraglottic technique was to the victim's nose. The bellows-to-nose technique was the "basic airway management technique" applicable by both medical and nonmedical personnel. Although the techniques had been described at the time, very few physicians practiced glottic (intubation) and subglottic (tracheotomy) techniques. Before the anesthetic era, positive-pressure ventilation was discredited and replaced by manual negative-pressure techniques. In the middle of the 19th century, physicians who would soon administer anesthetic gases were unfamiliar with the positive-pressure ventilation concept.

Pioneers of laryngoscopy: indirect, direct and video laryngoscopy.

Airway management is one of the core skills of the anaesthetist and various techniques of airway management have developed over many years. Initially, the only view of the glottis that could be obtained was an indirect view (indirect laryngoscopy). Late in the 19th century, a direct view of the glottis was obtained via various direct laryngoscopes. Currently, in the early 21st century, there has been a return to indirect laryngoscopy via videolaryngoscopy using a videolaryngoscope. The aim of this paper is to give a historical overview of the development of both direct and indirect laryngoscopy.

Eugène-Louis Doyen's pharyngeal tubes.

Eugène-Louis Doyen published illustrations of two pharyngeal tubes in his five-volume surgical textbook, Traité de Thérapeutique Chirurgicale et de Technique Opératoire. The first volume of Doyen's textbook was published in 1908 and it contains the earliest known illustration of one of Doyen's pharyngeal tubes. The Hewitt airway was described in Lancet in the same year. No information on the development of the Hewitt airway or Doyen's pharyngeal tubes was found. Doyen's pharyngeal tubes were functionally similar to modern supraglottic airways.

Supraglottic airways: the history and current state of prehospital airway adjuncts.

This review discusses the history, developments, benefits, and complications of supraglottic devices in prehospital care for adults and pediatrics. Evidence supporting their use as well as current controversies and developments in out-of-hospital cardiac arrest and rapid sequence airway management is discussed. Devices reviewed include the Laryngeal Mask Airway, Esophageal Tracheal Combitube, Laryngeal Tube, I-Gel, Air-Q, Laryngeal Mask Airway Fastrach, and the Supraglottic Airway Laryngopharyngeal Tube (SALT).

So many years ago.

A case of flail chest treated before availability of electrically driven respirators.

Airway manoeuvres to achieve upper airway patency during mask ventilation in newborn infants - An historical perspective.

Maintenance of upper airway patency remains a cornerstone of adequate airway management. Although various opening manoeuvres are recommended by neonatal resuscitation guidelines, none of these have been well evaluated in newly born infants. The aim of this article was to review the available literature about airway opening manoeuvres in newborn infants. We reviewed books, resuscitation manuals and articles from 1860 to the present with the search terms "Infant, Newborn", "airway management", "airway manoeuvres", "chin lift", "jaw thrust", "neutral position", "shoulder roll", "neonatal resuscitation", "positive pressure respiration" and "continuous positive airway pressure". Only human studies were included. During mask PPV, jaw thrust appears to be more effective in achieving a patent upper airway and might help to reduce airway obstruction. The additional application of chin lift might reduce leak during mask ventilation. However given the lack of available data these conclusions remains speculative and further research in this area is required.

Neonatal revolution - the introduction of PEEP.

Fifty years ago, a baby born at 24-26 weeks was not considered viable. It was a tragedy for the mother having carried it for so long. I witnessed such an event as a student. The scourge of premature deliveries was the lack of surfactant in many tiny babies. In general, if a premature infant with hyaline membrane disease, as it was called respiratory distress syndrome (RDS), could not maintain a pO(2) above 60 mmHg in 100% oxygen, it was not expected to survive. In late 1969, two babies with suspected RDS came to ICU and were treated by the author with the buffer (tris hydroxyl amino methane, [THAM] which reduced both metabolic and respiratory acidosis and did not contain sodium) and an isoprenaline infusion (ß(1) stimulant and pulmonary vasodilator). The X-ray appearances of RDS disappeared. Unfortunately, one died of portal vein thrombosis because the drugs were administered by umbilical catheter, which were commonly used at the time. The other one recovered but the physicians then said the diagnosis must have been wrong!