Best practice & research. Clinical anaesthesiology
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Airway management involves far more than just proficiency with tracheal intubation techniques. There are several infraglottic techniques available and the method chosen will depend on the accessibility of equipment, the level of training and expertise, and the patient's specific injury or disease. Endotracheal intubation is most commonly performed by direct laryngoscopy. ⋯ Successful intubation, however, requires considerable experience, as in intubation techniques using flexible fibrescopes. Both the EasyTube and the Combitube serve as an infraglottic or a supraglottic airway. The tip of the EasyTube resembles the one of an endotracheal tube, whereas the Combitube is much more bulky.
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Supraglottic airway devices are developed with increasing frequency following the overwhelming success of the laryngeal mask airway (LMA). Currently, the LMA, the ProSeal laryngeal mask airway (PLMA), the laryngeal tube (LT), the laryngeal tube with integrated suctioning tube (LTS) and the oesophageal tracheal combitube (OTC) are the best evaluated and most widespread devices. ⋯ LT and LTS are primarily intended as emergency airway devices, but have also been successfully used during controlled ventilation in adults. The OTC, though advocated for emergency as well as routine use, is limited by high airway morbidity and possible serious complications.
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The inability to secure the airway, with consequent failure of oxygenation and ventilation, is a life-threatening complication. Failure of oxygenation leads to hypoxia followed by brain damage, cardiovascular dysfunction, and finally death. Time is a very crucial factor in this context. ⋯ To minimize injury to the patient, the anesthesiologist should examine the patient's airway carefully, identify any potential problems, devise a plan that involves the least risk for injury, and have a back-up plan immediately available. Each anesthesiology department should establish guidelines/algorithms specific to their institution. Unfortunately, a reliable test for detecting all patients at risk does not exist.
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Best Pract Res Clin Anaesthesiol · Dec 2005
ReviewSurgical approach in difficult airway management.
In all difficult airway algorithms, cricothyroidotomy is the life-saving procedure and is the final 'cannot ventilate, cannot intubate' option, whether in pre-hospital, emergency department, intensive care unit, or operating room patients. Cricothyroidotomy is a relatively safe and rapid means of securing an emergency airway. As with all other critical procedures in emergency medicine, a thorough knowledge of the technique and adequate practice prior to attempting to perform an emergency cricothyroidotomy are essential.
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Securing and monitoring the airway are among the key requirements of appropriate therapy in emergency patients. Failures to secure the airways can drastically increase morbidity and mortality of patients within a very short time. Therefore, the entire range of measures needed to secure the airway in an emergency, without intermediate ventilation and oxygenation, is limited to 30-40 seconds. ⋯ The most commonly occurring adverse respiratory events are failure to intubate, failure to recognize oesophageal intubation, and failure to ventilate. Thus, it is essential that every anaesthesiologist working on the labour and delivery ward is comfortable with the algorithm for the management of failed intubation. The algorithm for emergency airway management describing the sequence of various procedures has to be adapted to internal standards and to techniques that are available.