Eric Raschke, DO1 and Leslie Kobayashi, MD2 1 Madigan Army Medical Center, Tacoma, WA, USA 2 Division of Trauma, Acute Care Surgery, Surgical Critical Care and Burns, University of California San Diego, San Diego, CA, USA Airway emergencies in pediatric patients are rare but lethal situations. The first attempt to secure the airway should be performed by the most senior operator under optimal conditions and can include advanced airway adjuncts such as bougies, fiberoptic or rigid bronchoscopy, and supraglottic devices such as laryngeal mask airways (LMAs). In contrast to adults, the preferred surgical airway for small children is open emergent tracheostomy. Cricothyroidotomy is not recommended for patients under 12 years of age as this is the narrowest portion of the pediatric airway and associated rates of subglottic stenosis are high. Instead, a percutaneous catheter or needle cricothyroidotomy and jet insufflation can be used to oxygenate the patient temporarily. Ventilation is necessarily restricted, and carbon dioxide levels will predictably rise over time. Conversion to an open tracheostomy or repeated attempt at intubation with advanced airway adjuncts or more experienced personnel should be performed rapidly to prevent carbon dioxide accumulation. Answer: A Krishna SG, Bryant JF, Tobias JD. Management of the difficult airway in the pediatric patient. J Pediatr Intensive Care. 2018; 7(3): 115–125. Engelhardt T, Virag K, Veyckemans F, Habre W. Airway management in pediatric anaesthesia in Europe‐insight from APRICOT (Anaesthesia Practice In Children Observation Trial): a prospective multicenter observational study in 261 hospitals in Europe. British J Anaesthesia. 2018; 121(1): 66–75. When dealing with aerosol‐generating procedures in the face of SARS‐type infection patients, it is essential to understand which measures need to be done to reduce transmission to the healthcare team. Any interaction should be performed using standard precautions, including handwashing and barrier precautions with gown, gloves, cap, mask, and eye protection. A higher risk of transmission is present during aerosol‐generating procedures, and additional precautions should be taken. Aerosol‐producing procedures include endotracheal intubation/extubation, bronchoscopy, mini‐bronchoalveolar lavage, open suctioning of airways, manual ventilation, unintentional or intentional ventilator disconnections, bilevel positive airway pressure, continuous positive airway pressure, cardiopulmonary resuscitation, and high‐flow oxygen. In these cases, additional use of N‐95 masks and/or PAPR is recommended. In the particular case of tracheostomy placement, the use of controlled apnea during the airway maneuvers has been shown to be safe for the patient and efficacious in preventing transmission to the operating surgeon and staff. Answer: E Murphy P, Holler E, Lindroth H, et al. Short‐term outcomes for patients and providers after elective tracheostomy in COVID‐19 positive patients. J Surg Res. 2020; 260: 38–45. Center for Disease Control and Prevention. Interim Infection Prevention and Control Recommendations for Healthcare Personnel During the Coronavirus Disease 2019 (COVID‐19) Pandemic. 2020. High cervical spinal cord injuries (SCI) have significant effects on patient respiratory status and carry a high risk of developing respiratory failure. Early tracheostomy has been shown to decrease hospital and ICU length of stay, reduce sedation requirements, and lower rates of pneumonia and hospital costs. In this clinical scenario, not only does the patient have a high cervical SCI, there is also a concomitant flail chest wall injury, making short‐term ventilator liberation unlikely. Early tracheostomy is recommended in these patients, and there has not been any associated increase in hardware infection rates with anterior approach cervical spine fixation or cross‐contamination of surgical sites using either open or percutaneous approaches. While early rib plating may improve times to ventilator liberation, it has not been shown to reduce mortality. Additionally, the location of this patient’s injury makes rib plating less impactful on time to ventilator liberation. While there are randomized controlled trials that demonstrate a modest improvement in ASIA grade with steroid administration following blunt SCI, more recent evidence to support their use is lacking and risks of infectious and metabolic complications likely outweigh the potential benefit for most patients, particularly those with complete injury. Answer: C Lozano CP, Chen KA, Marks JA, et al. Safety of early tracheostomy in trauma patients after anterior spinal fusion. J Trauma Acute Care Surg. 2018; 85(4): 741–746. Kaczmarek C, Aach M, Hoffmann MF, et al. Early percutaneous dilational tracheostomy does not lead to an increased risk of surgical site infection following anterior spinal surgery. J Trauma Acute Care Surg. 2017; 82(2): 383–386. This patient has several risk factors for a head injury, spinal injury, and blunt cerebrovascular injury (BCVI). Adjuncts to the secondary survey should evaluate for intracranial hemorrhage, spinal fracture, and BCVI. BCVI is present in up to 5% of blunt trauma admissions and can be devastating, associated with severe disability and even death. Early identification and treatment are paramount in modern trauma systems to reduce stroke risk and prevent poor outcomes associated with such injuries. CT angiography with multichannel (16–64) detectors has become the most commonly utilized screening modality. Screening criteria for BCVI have been a topic of evolution; however, the adoption of increasingly liberal criteria has been favored in many studies in an attempt to capture missed injuries. Commonly utilized screening criteria including the Denver criteria, Eastern Association for the Surgery of Trauma, Western Trauma Association, and the Scandinavian Neurotrauma Committee Guidelines have been associated with sensitivities as low as 57–84%, and missed injury rates of 20% including Denver grade 3 or higher injuries. While universal screening remains controversial, liberal criteria including screening for the mechanism of injury alone should be advocated to reduce the risk of missing significant injuries. Answer: C Muther M, Sporns PB, Hanning U, et al. Diagnostic accuracy of different clinical screening criteria for blunt cerebrovascular injuries compared with the liberal state of the art computed tomography angiography in major trauma. J Trauma Acute Care Surg. 2020; 88(6): 789–795. Leichtle SW, Banerjee D, Schrader R, et al. Blunt cerebrovascular injury: The case for universal screening. J Trauma Acute Care Surg. 2020; 89 (5): 880–886. Geddes AE, Burlew CC, Wagenaar A E, et al. Expanded screening criteria for blunt cerebrovascular injury: a bigger impact than anticipated. Am J Surg. 2016; 212(6): 1167–1174. Cervical spinal cord injuries (SCI) have a high rate of morbidity and mortality from respiratory complications. Of hospitalized patients with cervical SCI, 4 out of 5 deaths are from pulmonary dysfunction and pneumonia. The phrenic nerve that innervates the diaphragm arises from the C3–C5 nerve roots; therefore, the injury’s location plays a large role in the degree of pulmonary dysfunction, with higher injuries being associated with higher risks of respiratory complications. The diaphragm is responsible for generating approximately 65% of the normal respiratory tidal volume, with the remaining 35% attributed to the accessory muscles. Intact accessory muscle function and strong cough are associated with lower rates of respiratory complications. During the first 7 days post‐injury, the patient should have frequent measurements of vital capacity (VC), and intubation should be considered with a decreasing VC or VC approaching < 10 mL/kg, which signifies fatigue and pending respiratory failure. Altered mental status with GCS ≤ 13, older age, and comorbid conditions also increase the risk of overall complications, respiratory complications, and death. Answer: A Berlly M and Shem K. Respiratory management during the first five days after spinal cord injury. J Spinal Cord Med. 2007; 30 : 309–318. Claxton AR, Wong DT, Chung F, Fehlings MG. Predictors of hospital mortality and mechanical ventilation in patients with cervical spinal cord injury. Can J Anaesth. 1998; 45(2): 144–149. This situation’s goal is to not reach the point of “cannot intubate, cannot oxygenate” (CICO). Hypoxic brain injury occurs between 4 and 6 minutes of apnea and is irreversible after about 6 minutes. Studies have shown that hypoxemia in brain injury patients can significantly worsen the neurologic outcome. The first attempt to secure the airway should be for definitive tracheal access via direct laryngoscopy. Maneuvers to improve success at endotracheal intubation include appropriate positioning in patients without cervical spine precautions, use of video laryngoscopes, and use of a bougie. Attempts at tracheal intubation should be limited to 3–4 passes and should be halted immediately if any significant desaturations occur. Repeated attempts, even with experienced personnel, are associated with worse outcomes. Definitive surgical airway should be the next step in management; this is with a cricothyroidotomy in adults. Tracheostomy both open and percutaneous methods should only be utilized in controlled situations with a secure airway and are not emergent airway options in adult trauma patients. Answer: A Frerk, C, Mitchell, VS, McNarry, AF, et al. Difficult Airway Society 2015 guidelines for management of unanticipated difficult intubation in adults. Br J. Anaesth. 2015; 115 (6): 827–848. Higgs A, McGrath BA, Goddard C, et al. Guidelines for the management of tracheal intubation in critically ill adults. Br J Anaesth. 2018; 120(2): 323–352.
29
Blunt and Penetrating Neck Trauma