CT Findings in Laryngeal Trauma and the Clinical Implications

PURPOSE

Acute traumatic osseous and cartilaginous injuries to the larynx are rare injuries presenting to the emergency department. Despite the low reported incidence, laryngeal trauma carries a high morbidity and mortality. The purpose of this study is to identify fracture and soft tissue injury patterns in laryngeal trauma and explore associations with patient demographics, mechanisms of injury, urgent airway and surgical intervention.

METHODS

A retrospective review of patients with laryngeal injury who underwent multidetector computed tomography (MDCT) imaging was performed. The CT findings of laryngeal and hyoid fracture location, fracture displacement, and soft tissue injuries were recorded. Clinical data including patient demographics, mechanisms of injury, frequency of airway and surgical intervention were also recorded. Correlation of imaging characteristics with patient demographics, mechanism of injury and interventions were assessed for statistical significance using χ2 and Fisher's exact tests.

RESULTS

The median patient age was 40 years old with a strong male predominance. The most common mechanisms of injury included motor vehicle collisions and penetrating gunshot wounds. Thyroid cartilage fractures were the most common fracture type. Findings of fracture displacement and airway hematoma had a higher correlation with requiring urgent airway management.

CONCLUSION

Radiologists' early recognition and prompt communication of laryngeal trauma to the clinical service is important to reduce associated morbidity and mortality. Displaced fractures and laryngeal hematomas should be promptly conveyed to the clinical service as they are associated with more complex injuries and higher rates of urgent airway management and surgical intervention.

Laryngeal trauma: a review of current diagnostic and management strategies

PURPOSE OF REVIEW

The purpose of this review is to provide the most up to date information on evaluation and management of laryngeal trauma.

RECENT FINDINGS

Timely diagnosis and proper treatment of laryngeal fractures are imperative for preserving a functional larynx. This review will focus on evaluation and management strategies.

SUMMARY

The larynx provides significant functions including respiration, phonation, and airway protection. Algorithms have been developed in order to standardize the evaluation and management of these injuries to preserve a functional larynx. Physicians must diagnose and treat these laryngeal traumas in a timely fashion in order to prevent morbidity and, rarely, mortality.

Management of paediatric laryngotracheal trauma

Objective

To summarise and describe the clinical presentations, diagnostic approaches and airway management techniques in children with laryngotracheal trauma.

Methods

The clinical data related to laryngotracheal trauma diagnosed and treated at the Beijing Children's Hospital, between January 2013 and July 2018, were retrospectively reviewed. Disease diagnosis, treatment, management and outcomes were analysed.

Results

A total of 13 cases were enrolled, including 7 cases of penetrating laryngotracheal trauma. The six cases of blunt laryngotracheal trauma were caused by collisions with hard objects. In all cases, voice, airway and swallowing outcomes were graded as ‘good’, except for one patient who had residual paralysis of the vocal folds.

Conclusion

Flexible fibre-optic laryngoscopy and computed tomography can play an important role in diagnosing laryngotracheal trauma. The airway should be secured and, if necessary, opened by tracheal intubation or tracheostomy.

Clinical, Radiologic, and Endolaryngeal Findings in Laryngeal Fractures: A 15-Year Case Series

Objective

Laryngeal fractures are rare injuries; recent data describing these injuries and associated examination findings are limited. This study aims to describe injury etiology and outcomes associated with laryngeal fractures.

Study Design

Retrospective case series.

Setting

Academic tertiary center.

Methods

Patients with laryngeal fractures from 2005 to 2020 were identified in a retrospective chart review. Patient demographics, injury mechanisms, management, and voice outcomes were examined. Fracture type, radiologic, and endolaryngeal examination findings were analyzed for associations between fracture etiology and examination characteristics.

Results

Laryngeal fractures most commonly occurred at the thyroid cartilage. Fractures were most commonly due to sport-related injuries. Mechanism of injury was not associated with specific radiologic or endolaryngeal findings. Mechanism of injury was additionally not significantly associated with the need for intubation, surgical intervention, or tracheotomy. Fracture location was significantly associated with intubation requirement (P = .015), with 40% of patients with concomitant thyroid and cricoid fractures requiring intubation. Mechanism of injury significantly correlated with dysphonia at follow-up (P = .033). Mechanism of injury, fracture location, and surgical management were not associated with increased vocal fold injury or dysphonia.

Conclusion

There are no significant correlations between injury mechanism and fracture location, characteristics, radiologic findings, or endolaryngeal findings. These features emphasize the importance of a thorough and comprehensive laryngeal examination.

Management of traumatic laryngotracheal separation: Case series and review

Laryngotracheal separation injuries are a rare but serious condition, as survival from such injuries relies on proper airway management. As a result, recommendations for management have been based on small case reports and expert opinion. We reviewed our last 10 years of experience with managing laryngotracheal separation injuries and identified 6 cases for chart review. Awake tracheostomy or videolaryngobronchoscopy was used in each case to initially obtain the airway. Surgical repair was then performed immediately using nonabsorbable monofilament suture or a miniplate, and a low fenestrated tracheostomy was placed. All of our patients who followed up were decannulated, eating regular diets, and had satisfactory voice quality at 3 months postoperatively. Review of the literature revealed that, while management strategies have changed over time, treatment still varies widely depending on surgeon preference and the details of each injury. Outcomes from our series suggest that our described techniques and management strategies can be used with good outcomes. We believe that this is due to securing a safe airway, early surgical intervention with no unnecessary tissue dissection, effective reconstruction of the airway, and the fenestrated tracheostomy technique.

CT-based assessment of laryngeal fracture patterns and associated soft tissue abnormality

OBJECTIVE

Acute traumatic injuries to the larynx, including fractures of the hyoid bone, cricoid, and thyroid cartilage, are uncommon injuries. The purpose of this study was to assess fracture and soft tissue patterns associated with laryngeal trauma.

METHODS

This was a retrospective review of patients with laryngeal fractures who presented to two level I trauma centers and underwent CT imaging. Imaging findings, including fractures of the cartilaginous structures of the larynx and hyoid bone, and soft tissue abnormalities including focal hematoma, edema with non-focal hemorrhage, and additional penetrating injuries were recorded. Frequencies of fracture patterns were recorded.

RESULTS

Thyroid cartilage fractures were most frequently observed occurring in 45/55 patients, followed by cricoid fractures in 13/55 patients. Hyoid fractures were encountered in 8/55 patients. Multi-site fractures were observed in 12/55 patients with thyroid-cricoid fractures occurring in 8/12 patients, followed by thyroid-hyoid fractures in 2/12 patients. Most multi-site fractures occurred in association with focal supraglottic hematomas (10/12), supraglottic edema and non-focal hemorrhage (11/12), and focal subglottic hematoma (5/12). All 13 cricoid fractures occurred with either focal supraglottic hematoma (7), focal subglottic hematoma (4), or edema with non-focal hemorrhage (13).

CONCLUSIONS

Thyroid cartilage fractures were the most frequently encountered fracture, followed by cricoid cartilage fractures. Cricoid fractures always occurred with soft tissue abnormalities. Recognition of fracture patterns in the setting of laryngeal trauma and associated patterns of soft tissue injury is important for practicing radiologists for early diagnosis of these conditions and reduction of associated morbidity.

KEY POINTS

• Acute fractures to the larynx may be isolated fractures or occur as multi-focal fractures. • Thyroid cartilage fractures are the most frequent fractures followed by cricoid cartilage fractures. • Cricoid cartilage fractures always occurred in association with soft tissue abnormalities.

Laryngeal fractures in professional and semiprofessional ice hockey players

OBJECTIVE

Injuries in professional ice hockey players are common, however significant laryngeal trauma is rare. Here, we present a case series of professional and semiprofessional ice hockey players to demonstrate the mechanism and nature of laryngeal injuries they sustain during play, and to recommend best practices for treatment, prevention, and return to the ice.

METHODS

A retrospective case review was done of hockey-related laryngeal injuries between 2016 and 2019 at a tertiary laryngology practice. Only semiprofessional and professional hockey players were included.

RESULTS

In total, four cases were included. All cases involved trauma from a hockey puck to the neck. No cases were the result of punching, fighting, high sticks or routine checking. Notably, 1 of 4 presented with severe airway compromise, requiring urgent intubation, whereas most presented with pain or a significant voice complaint. Two patients required operative intervention with open reduction and internal fixation of significantly displaced fractures. One patient experienced significant mucosal disruption with cartilaginous exposure at the posterior vocal complex requiring microflap. The average return to ice was 6 weeks for those who required operative intervention and 4 weeks for those who were managed conservatively. One patient had persistent mild dysphonia and all others had a return to baseline phonation. None were wearing neck guards or other protective equipment at the time of injury.

CONCLUSION

Though voice and airway injuries are rarely sustained by ice hockey players, they may require urgent intervention. We recommend that protective equipment be worn and improved to prevent laryngeal trauma.

LEVEL OF EVIDENCE

4.

Blunt laryngeal trauma presenting as bilateral massive pneumothoraces and subcutaneous emphysema: a multidisciplinary approach to management

A 3-year-old boy had an unwitnessed fall from a highchair. The child had no loss of consciousness, vomiting, stridor or respiratory distress but within a few minutes had significant swelling in the neck, scalp and around the eyes. He was brought immediately to the emergency room where he deteriorated rapidly and was intubated with a cuffed oral endotracheal tube. A clinical diagnosis of blunt laryngeal trauma was made. Imaging showed no laryngeal disruption, but did reveal massive bilateral pneumothoraces, that were managed with chest tube. A multidisciplinary meeting with family led to a watchful waiting approach. The patient was successfully extubated at 1 week and healed with a clear voice.

Anesthetic management of tracheal laceration from traumatic dislocation of the first rib: a case report and literature of the review

Background

Tracheobronchial lacerations from trauma can be life-threatening and present significant challenges for safe anesthetic management. Early recognition of tracheal injuries and prompt airway control can be lifesaving.

Case presentation

A 56-year-old man with no significant medical history presented with difficulty breathing after a blunt trauma to his chest to the emergency room and was diagnosed with dislocation of the first rib and tracheal laceration after a chest tomography (CT) study. Subcutaneous emphysema in neck area quickly worsened indicating continuous air leak. Emergent surgical repair was scheduled. General anesthesia with maintaining spontaneous ventilation was performed and a 5.5 mm endotracheal tube was placed under the guidance of flexible bronchoscopy. Depth of anesthesia was maintained to achieve a Bispectral Index Score of 40–60. Once the offending first rib was removed, a 7.5 mm endotracheal tube was inserted distal to the laceration site with the guidance of flexible bronchoscopy. Once confirmed location of the endotracheal tube, cisatracurium was administered intravenously and the patient was managed on mechanical ventilation with interval positive pressure ventilation. The operation was successful and he was transferred to the ICU intubated. He then received elective surgical repairs for sternum fracture, multiple rib fractures and hemopneumothorax under general anesthesia on day 5 after the first surgery and was extubated on postoperative day 7. The subsequent course was uneventful. Comprehensive rehabilitation was done for 2 weeks and he was discharged home on postoperative day 41.

Conclusions

Early diagnosis and multidisciplinary collaborations are keys to the successful management of this patient. Flexible bronchoscopy is particularly useful in airway management for urgent trachea tracheal laceration repair.

Systematic review of the anaesthetic management of non-iatrogenic acute adult airway trauma

INTRODUCTION

Non-iatrogenic trauma to the airway is rare and presents a significant challenge to the anaesthetist. Although guidelines for the management of the unanticipated difficult airway have been published, these do not make provision for the 'anticipated' difficult airway. This systematic review aims to inform best practice and suggest management options for different injury patterns.

METHODS

A literature search was conducted using Embase, Medline, and Google Scholar for papers after the year 2000 reporting on the acute airway management of adult patients who suffered airway trauma. Our protocol and search strategy are registered with and published by PROSPERO (http://www.crd.york.ac.uk/PROSPERO, ID: CRD42016032763).

RESULTS

A systematic literature search yielded 578 articles, of which a total of 148 full-text papers were reviewed. We present our results categorized by mechanism of injury: blunt, penetrating, blast, and burns.

CONCLUSIONS

The hallmark of airway management with trauma to the airway is the maintenance of spontaneous ventilation, intubation under direct vision to avoid the creation of a false passage, and the avoidance of both intermittent positive pressure ventilation and cricoid pressure (the latter for laryngotracheal trauma only) during a rapid sequence induction. Management depends on available resources and time to perform airway assessment, investigations, and intervention (patients will be classified into one of three categories: no time, some time, or adequate time). Human factors, particularly the development of a shared mental model amongst the trauma team, are vital to mitigate risk and improve patient safety.

Penetrating neck injuries: a guide to evaluation and management

Introduction Penetrating neck injury is a relatively uncommon trauma presentation with the potential for significant morbidity and possible mortality. There are no international consensus guidelines on penetrating neck injury management and published reviews tend to focus on traditional zonal approaches. Recent improvements in imaging modalities have altered the way in which penetrating neck injuries are now best approached with a more conservative stance. A literature review was completed to provide clinicians with a current practice guideline for evaluation and management of penetrating neck injuries. Methods A comprehensive MEDLINE (PubMed) literature search was conducted using the search terms 'penetrating neck injury', 'penetrating neck trauma', 'management', 'guidelines' and approach. All articles in English were considered. Articles with only limited relevance to the review were subsequently discarded. All other articles which had clear relevance concerning the epidemiology, clinical features and surgical management of penetrating neck injuries were included. Results After initial resuscitation with Advanced Trauma Life Support principles, penetrating neck injury management depends on whether the patient is stable or unstable on clinical evaluation. Patients whose condition is unstable should undergo immediate operative exploration. Patients whose condition is stable who lack hard signs should undergo multidetector helical computed tomography with angiography for evaluation of the injury, regardless of the zone of injury. Conclusions The 'no zonal approach' to penetrating neck trauma is a selective approach with superior patient outcomes in comparison with traditional management principles. We present an evidence-based, algorithmic and practical guide for clinicians to use when assessing and managing penetrating neck injury.

A case for less workup in near hanging

BACKGROUND

No guidelines exist for the evaluation of patients after near hanging. Most patients receive a comprehensive workup, regardless of examination. We hypothesize that patients with a normal neurologic examination, without major signs or symptoms suggestive of injury, require no additional workup.

METHODS

We reviewed medical charts of adult trauma patients who presented to a Level I trauma center between 1995 and 2013 after an isolated near-hanging episode. Demographics, Glasgow Coma Scale (GCS) score, imaging, and management were collected. Patients were stratified by neurologic examination into normal (GCS score = 15) and abnormal (GCS score <15) groups. Comparison between the groups was completed using univariate analyses.

RESULTS

One hundred twenty-five patients presented after near hanging: 42 (33.6%) had abnormal GCS score, and 83 (66.4%) were normal. Among the normal patients, seven patients (8.5%) reported cervical spine tenderness; these patients also had abnormal examination findings including dysphagia, dysphonia, stridor, or crepitus. The normal group underwent 133 computed tomography scans and seven magnetic resonance imaging scans, with only two injuries identified: C5 facet fracture and a low-grade vertebral artery dissection. Neither injury required intervention. In patients with normal GCS score, cervical spine tenderness and at least one significant examination finding were 100% sensitive and 79% specific for identifying an underlying injury.

CONCLUSION

Patient with normal GCS score, without signs and symptoms of injury, are unnecessarily receiving extensive diagnostic imaging. Imaging should be reserved for patients with cervical spine tenderness and dysphagia, dysphonia, stridor, and/or crepitus without the fear of incomplete workup. All patients with signs of additional trauma or decreased GCS score should be studied based on preexisting protocols.

LEVEL OF EVIDENCE

Therapeutic/care management study, level V.

Adult airway evaluation in oral surgery

Patients with a history of difficult intubation or with conditions associated with difficult airway should be approached with organized primary and secondary plans for airway management. When these potential problems are detected, patient safety may be improved with use of advanced airway management techniques and equipment. Additionally, patient referral for consultation and/or management at facilities where advanced airway management practitioners and equipment are available may be beneficial in some cases.

Traumatic laryngeal fracture in a collegiate basketball player

Laryngotracheal trauma is a rare condition that accounts for less than 1% of blunt trauma. Laryngotracheal fractures are uncommon in sports, even in settings where athletes are more vulnerable, including football, basketball, and hockey. If a laryngeal injury is suspected, immediate evaluation is required to avoid a delay in the diagnosis of a potentially life-threatening injury. A collegiate basketball player sustained an unusual fracture involving the cricoid and thyroid cartilage during practice. This case illustrates the importance of rapid identification and early management of patients with blunt laryngotracheal trauma in sports.

Analysis of clinical feature and management of laryngeal fracture: recent 22 case review

PURPOSE

Laryngeal fracture is rare, but complications are frequent and severe. Controversy still exists in regards to its proper management. The aim of this study was to present the clinical findings and management of laryngeal fracture in Korea.

MATERIALS AND METHODS

We analyzed the medical records of 22 patients with laryngeal fracture at a tertiary care trauma center from 2000 to 2010 retrospectively.

RESULTS

In total, 22 patients (19 men and 3 woman) presented with laryngeal fractures caused by blunt (n=13) or penetrating (n=9) injury. Pain (68.1%), odynophagia (68.1%), hoarseness (18.1%), hemoptysis (13.6%), and subcutaneous emphysema (9%) were the common presenting symptoms and noncomminuted fracture was common. High velocity blunt trauma (mostly traffic accidents) patients had more extensive injury and poor voice outcomes. Penetrating trauma patients due to physical assault or suicide attempt demonstrated more frequently injuries on the left side.

CONCLUSION

In driver-caused traffic accidents, where injuries in a wide area within the larynx occurred, poor voice results were seen, and these injuries required aggressive treatment. When endotracheal intubation was performed at experienced emergency centers with fiberoptic laryngoscopes, airway management was safely achieved. In addition, if the fractured laryngeal framework was corrected at appropriate times, voice results were good.

A rare case of survival after complete traumatic cricotracheal separation

We report the survival of an extremely rare case of complete cricotracheal transection following incisional trauma with knife. The clinical record underlines the importance of prompt airway management and immediate neck exploration in such cases. To the authors knowledge, such a case has not been reported previously in the literature.

An evidence based review of the assessment and management of penetrating neck trauma

BACKGROUND

Although relatively uncommon, penetrating neck trauma has the potential for serious morbidity and an estimated mortality of up to 6%. The assessment and management of patients who have sustained a penetrating neck injury has historically been an issue surrounded by significant controversy. OBJECTIVES OF REVIEW: To assess recent evidence relating to the assessment and management of penetrating neck trauma, highlighting areas of controversy with an overall aim of formulating clinical guidelines according to a care pathway format.

TYPE OF REVIEW

Structured, non-systematic review of recent medical literature.

SEARCH STRATEGY

An electronic literature search was performed in May 2011. The Medline database was searched using the Medical Subject Headings terms 'neck injuries' and 'wounds, penetrating' in conjunction with the terms 'assessment' or 'management'. Embase was searched with the terms 'penetrating trauma' and 'neck injury', also in conjunction with the terms 'assessment' and 'management'. Results were limited to articles published in English from 1990 to the present day.

EVALUATION METHOD

Abstracts were reviewed by the first three authors to select full-text articles for further critical appraisal. The references and citation links of these articles were hand-searched to identify further articles of relevance.

RESULTS

147 relevant articles were identified by the electronic literature search, comprising case series, case reports and reviews. 33 were initially selected for further evaluation.

CONCLUSIONS

Although controversy continues to surround the management of penetrating neck trauma, the role of selective non-operative management and the utility of CT angiography to investigate potential vascular injuries appears to be increasingly accepted.

Traumatic airway management in Operation Iraqi Freedom

OBJECTIVES

To examine the role of head and neck surgeons in traumatic airway management in Operation Iraqi Freedom and to understand the lessons learned in traumatic airway management to include a simple airway triage classification that will guide surgical management.

STUDY DESIGN

Case series with chart review.

SETTING

Air Force Theater Hospital at Balad Air Base, Iraq.

SUBJECTS AND METHODS

The traumatic airway experience of 6 otolaryngologists/head and neck surgeons deployed over a 30-month period in Iraq was retrospectively reviewed.

RESULTS

One hundred and ninety-six patients presented with airway compromise necessitating either intubation or placement of a surgical airway over the 30-month timeframe. Penetrating face trauma (46%) and penetrating neck trauma (31%) were the most common mechanisms of injury necessitating airway control. The traumatic airways performed include 183 tracheotomies, 3 cricothyroidotomies, 9 complicated intubations, and 1 stoma placement. Red or emergent airways were performed in 10% of patients, yellow or delayed airways in 58% of patients, and green or elective airways in 32% of patients. Lastly, surgical repair of the laryngotracheal complex was performed in 25 patients with 16 thyroid cartilage repairs, 4 cricoid repairs, and 8 tracheal repairs.

CONCLUSIONS

The role of the deployed otolaryngologist in traumatic airway management was crucial. Potentially lifesaving airways (red/yellow airways) were placed in 68% of the patients. The authors' recommended treatment classification should optimize future traumatic airway management by stratifying traumatic airways into red (airway less than 5 minutes), yellow (airway less than 12 hours), or green categories (airway greater than 12 hours).

Management of laryngeal fractures--a 10-year experience

OBJECTIVES

Laryngeal fracture patients can present with a spectrum of clinical findings ranging from normal to airway collapse and death. We will therefore examine and emphasize clinical presentation, an algorithm for appropriate diagnosis and acute airway management, and radiological or physical examination findings and demonstrate the appropriate surgical approach for optimum clinical outcome in cases of blunt and penetrating laryngeal injury. Herein, we present one of the largest series of management of laryngeal and tracheal fractures from a tertiary care level I trauma center.

STUDY DESIGN

A retrospective chart review from 1998 to 2008.

METHODS

A retrospective chart analysis on patients presenting to the head and neck trauma service. Institutional review board approval was obtained before the start of the research.

RESULTS

Our series consisted of 11 men and one woman with a mean age of 41.8 years presenting with laryngeal fractures caused by blunt (n=10) or penetrating (n=2) trauma. One patient presented with complete laryngotracheal separation, which was successfully managed by immediate tracheotomy and early surgical intervention. The other 11 patients had a combination of conservative (n=6) and surgical (n=5) management. All patients who required a tracheotomy (n=7) were decannulated.

CONCLUSIONS

Early suspicion and diagnosis of acute laryngeal and tracheal injuries are crucial. The airway must be secured via tracheotomy when possible. Computed tomography scans play a central role in diagnosis. Proper restoration of the laryngeal framework with appropriately timed open reduction and internal fixation is critical for optimal recovery of the airway, voice, and swallowing.

Multidetector row computed tomography in the management of penetrating neck injuries

Penetrating neck trauma may occur from gun shots, stabbings, and accidental injury. Approximately 50% of gunshot and 10%-20% of stab-wound patients are reported as having severe injuries and the mortality from severe vascular injuries is reported as high as 50%. Penetrating traumatic neck injury is no longer best managed with exploratory surgery or conventional angiography in the stable patient. Computed tomography angiography has proven to be a useful, safe, and reliable means of diagnosis. Experience with interpreting and reconstructing computed tomography images, understanding the clinically important findings, and avoiding pitfalls is critical for successful patient care. Therefore, radiologists and clinicians who treat trauma patients need to familiarize themselves with the computed tomography angiography technique and appearances of vascular injury and know when to recommend further evaluation, such as interventional angiography or open surgery.

Survival after traumatic complete laryngotracheal transection

Laryngotracheal trauma may result in lifelong complications or even death if diagnosis or treatment is delayed. Emergency department physicians, trauma surgeons, anesthesiologists, and especially thoracic surgeons should maintain a high level of awareness of and suspicion for laryngotracheal trauma whenever a patient present with multiple trauma in general or with cervical-thoracic trauma in particular. A blunt or penetrating laryngotracheal injury can result in acute airway obstruction and death at the scene of an accident or crime. In recent years, advances in emergency services, including better evacuation procedures and heightened training, have improved survival rates. In this article, we present a case of survival after complete laryngotracheal transection for blunt cervical and thoracic trauma.

Tracheal Rupture After Blunt Trauma

Tracheal injuries are uncommon after blunt trauma. Early diagnosis and urgent treatment are primordial to reduce both mortality and morbidity. We describe the case of a 45-year-old man who met with a traffic accident and was brought to the emergency department. Progressively, he developed dyspnoea and coughing. The diagnosis of a tracheal rupture was established and the rupture was closed surgically. The management of the patient with suspected tracheal rupture is discussed.