Head, facial, and clavicular trauma as a predictor of cervical-spine injury

Incidence of Cervical Spine Injuries Associated with Maxillofacial Trauma and its Association with Facial Injury Severity

Introduction

Maxillofacial injuries are among the most common that present to the emergency department together with associated injuries to other systems. Trauma to maxillofacial region should raise a high suspicion for cervical spine injury. The presence or absence of cervical spine injury has important implications in trauma patients. Therefore, we conducted a study to assess the incidence of cervical spine injuries in maxillofacial trauma and to relate the severity of maxillofacial trauma.

Materials and Methods

A prospective analysis was conducted on 270 maxillofacial fracture patients who reported to casualty. All the patients were evaluated for facial injury severity scale (FISS), epidemiological demographic and clinical characteristics, the presence of cervical spine injuries and their severity.

Results

Of the 270 maxillofacial fracture patients, 2.96% had associated cervical spine injuries (CSI). Majority of CSI cases were caused by road traffic accidents (75%). Most of CSI occurred in association with mandibular fractures (55.2%), and most injuries occurred at the level of C6/C7 (62.5%). Most of the CSI had moderate FISS (87.5%). Neurological deficits were observed in 6 cases (75%) in which 5 patients had motor deficits and one patient had sensory deficient. Majority of patients had sustained major neurological deficits like quadriplegia (50%) followed by upper limb weakness and then tenderness.

Conclusion

All the patients who sustained maxillofacial injuries must be evaluated for cervical spine injuries to prevent life threatening conditions like neurological morbidities and even mortality. From our study, we concluded that as severity of facial injury increases, the chances of CSI also increase.

Cervical spine injuries in facial fracture patients - injury mechanism and fracture type matter

Evidence supports the notion that craniofacial fractures are significant predictors of cervical spine injuries (CSIs), but some debate remains on the injury mechanism of co-existing CSIs in craniofacial fractures and the relationship between CSI and specific facial fractures. In this retrospective study, we aim to assess the incidence rates of specific facial fracture types as well as other important variables and their relationship with CSIs. The primary outcome variable, CSI, and several predictor variables, including facial fracture type, were evaluated with logistic regression analyses. Of 2919 patients, the total CSI incidence rate was 3.0%. Rates of CSI in patients with isolated mandibular fractures (OR 0.26 CI 0.10, 0.63; p = 0.006) were lower than those previously reported, whereas isolated nasal fractures were strongly associated with CSI (OR 2.67 CI 1.36, 5.22; p = 0.004). Patients with concomitant cranial injuries were twice as likely to have CSI (OR 2.00, CI 1.22, 3.27; p = 0.006). Even though there is a strong occurrence rate of CSIs in patients with cranial injuries, clinicians should be aware that patients presenting with isolated facial fractures are at significant risk for sustaining CSIs also.

Occurrence and prognostic effect of cervical spine injuries and cervical artery injuries with concomitant severe head injury

BACKGROUND

Blunt cerebrovascular injuries (BCVIs) and cervical spinal injuries (CSIs) are not uncommon injuries in patients with severe head injury and may affect patient recovery. We aimed to assess the independent relationship between BCVI, CSI, and outcome in patients with severe head injury.

METHODS

We identified patients with severe head injury from the Helsinki Trauma Registry treated during 2015-2017 in a large level 1 trauma hospital. We assessed the association between BCVI and SCI using multivariable logistic regression, adjusting for injury severity. Our primary outcome was functional outcome at 6 months, and our secondary outcome was 6-month mortality.

RESULTS

Of 255 patients with a cervical spine CT, 26 patients (10%) had a CSI, and of 194 patients with cervical CT angiography, 16 patients (8%) had a BCVI. Four of the 16 BCVI patients had a BCVI-related brain infarction, and four of the CSI patients had some form of spinal cord injury. After adjusting for injury severity in multivariable logistic regression analysis, BCVI associated with poor functional outcome (odds ratio [OR] = 6.0, 95% CI [confidence intervals] = 1.4-26.5) and mortality (OR = 7.9, 95% CI 2.0-31.4). We did not find any association between CSI and outcome.

CONCLUSIONS

We found that BCVI with concomitant head injury was an independent predictor of poor outcome in patients with severe head injury, but we found no association between CSI and outcome after severe head injury. Whether the association between BCVI and poor outcome is an indirect marker of a more severe injury or a result of treatment needs further investigations.

Evaluation of clinical criteria to determine the need for cervical spine imaging in victims of blunt assault

The purpose of this study is to evaluate effectiveness of clinical criteria, specifically the NEXUS Criteria, in determining the need for cervical spine imaging in victims of blunt assault to head and face. CT results from victims of blunt assault to the head and face were compared with presenting clinical findings. The presence or absence of cervical spine injury was correlated with positive NEXUS criteria to determine if the clinical criteria appropriately risk stratified patients in this population. Incidence of c-spine injury was 1.09% (7/641). For clinically significant injury, the incidence dropped to 0.16% (1/641). PPV of NEXUS criteria in blunt assault to the head and face for any injury in our study was 1.4% (95% CI: 0.6%-2.6%) compared to 2.7% (95% CI: 2.6%-2.8%) in the NEXUS validity study. PPV of NEXUS criteria in blunt assault to the head and face for significant injury in our study was 0.2% (95% CI: 0%-0.9%) compared to 1.9% (95% CI: 1.8%-2.0%) in the NEXUS validity study. The findings demonstrate a statistically significant difference between the PPV of NEXUS criteria in victims of blunt assault to the head and face when compared to all blunt trauma in the NEXUS validity study. This suggests that the clinical criteria do not adequately stratify this low risk population, leading to imaging over-utilization. Limited use of cervical spine imaging in victims of blunt assault will decrease radiation exposure and healthcare costs and will strengthen the validity of clinical risk stratification for more high-risk groups.

Frequency of cervical spine injuries in patients with midface fractures

The aim of this retrospective cohort study was to determine the frequency and risk factors for cervical spine injury (CSI) in patients with midface fractures. Patients ≥18 years of age entered in the Massachusetts General Hospital Trauma Registry from 2007 to 2017 were identified. Those with a midface fracture, computed tomography and/or magnetic resonance imaging of the cervical spine, and complete medical records were included. There were 23,394 patients in the registry; 3950 (16.9%) had craniomaxillofacial fractures and 1822 (7.8%) had a CSI. Craniomaxillofacial fractures included fractures of the midface (n=2803, 71.0%), mandible (n=873, 22.1%), and midface plus mandible (n=274, 6.9%). The overall frequency of CSI in patients with midface fractures was 11.4% (350/3077). Patients with midface fractures had a higher risk for CSI compared to patients without a midface fracture (odds ratio 2.4, 95% confidence interval 2.1-2.4, P<0.001). In a multivariate model, nasal and orbital fractures, chest injuries, age, injury severity score, and motor vehicle crash or fall as the etiology were independent risk factors for CSI. Mortality was two times higher in subjects with CSI. Early and accurate diagnosis of CSI is a critical factor when planning the treatment of patients with these fractures.

Risk Factors for Cervical Spine Injury in Patients With Mandibular Fractures

PURPOSE

Patients with mandibular fractures are known to be at risk of concomitant cervical spine injuries (CSIs). The purpose of this study was to determine the incidence of and risk factors for CSIs in these patients.

PATIENTS AND METHODS

We conducted a retrospective cohort study of adult trauma patients with mandibular fractures from June 1, 2007, through June 30, 2017. Patients were identified through the Massachusetts General Hospital trauma registry and were included as study patients if they had a mandibular fracture and computed tomography or magnetic resonance imaging of the cervical spine. The primary predictor variable was the site of the mandibular fracture; the primary outcome variables were the presence of CSIs and death. The other variables were demographic characteristics (age, gender, alcohol use, and drug use), Injury Severity Score, Glasgow Coma Scale, presence of midface and extra-craniofacial injuries, and etiology. Data analysis consisted of univariate correlations and construction of a multivariate model to determine independent risk factors for CSIs.

RESULTS

Of 23,394 patients in the trauma registry, 3,950 (17%) had craniomaxillofacial fractures and 1,822 (7.7%) had CSIs. The frequency of CSIs in the overall cohort of mandibular fracture patients (n = 1,147) was 4.4%, and for admitted patients (n = 495), it was 10%. The mean age of patients with mandibular fractures plus CSIs was 40 years (range, 19 to 93 years); 84% were men. Patients with a ramus-condyle unit fracture, mandibular fracture plus any midface fracture, non-craniomaxillofacial injury, and motor vehicle crash etiology had the highest frequency of CSIs. Ramus-condyle unit fractures and chest injuries were independent risk factors for CSIs in the multivariate model (P = .0334 and P = .0013, respectively). The mortality rate was 4-fold higher in patients with CSIs versus those without CSIs.

CONCLUSIONS

The presence of ramus-condyle unit fractures and the presence of chest injuries were independent risk factors for CSIs. Oral and maxillofacial surgeons should be diligent in ruling out CSIs in mandibular fracture patients.

Cervical spinal cord injury after blunt assault: Just a pain in the neck?

BACKGROUND

We aimed to determine the incidence, risk factors, and outcomes of cervical spinal cord injury (CSCI) after blunt assault.

METHODS

The ACS National Trauma Data Bank (NTDB) 2012 Research Data Set was used to identify victims of blunt assault using the ICD-9 E-codes 960.0, 968.2, 973. ICD-9 codes 805.00, 839.00, 806.00, 952.00 identified cervical vertebral fractures/dislocations and CSCI. Multivariable analyses were performed to identify independent predictors of CSCI.

RESULTS

14,835 (2%) out of 833,311 NTDB cases were blunt assault victims and thus included. 217 (1%) had cervical vertebral fracture/dislocation without CSCI; 57 (0.4%) had CSCI. Age ≥55 years was independently predictive of CSCI; assault by striking/thrown object, facial fracture, and intracranial injury predicted the absence of CSCI. 25 (0.02%) patients with CSCI underwent cervical spinal fusion.

CONCLUSIONS

CSCI is rare after blunt assault. While the odds of CSCI increase with age, facial fracture or intracranial injury predicts the absence of CSCI.

SUMMARY

The incidence, risk factors, and outcomes of cervical spinal cord injury (CSCI) after blunt assault was investigated. 14,835 blunt assault victims were identified; 217 had cervical vertebral fracture/dislocation without CSCI; 57 had CSCI. Age ≥55 years was found to independently predict CSCI, while assault by striking/thrown object, facial fracture, and intracranial injury predicted the absence of CSCI.

Low Yield of Paired Head and Cervical Spine Computed Tomography in Blunt Trauma Evaluation

BACKGROUND

With increased computed tomography (CT) utilization, clinicians may simultaneously order head and neck CT scans, even when injury is suspected only in one region.

OBJECTIVE

We sought to determine: 1) the frequency of simultaneous ordering of a head CT scan when a neck CT scan is ordered; 2) the yields of simultaneously ordered head and neck CT scans for clinically significant injury (CSI); and 3) whether injury in one region is associated with a higher rate of injury in the other.

METHODS

This was a retrospective study of all adult patients who received neck CT scans (and simultaneously ordered head CT scans) as part of their blunt trauma evaluation at an urban level 1 trauma center in 2013. An expert panel determined CSI of head and neck injuries. We defined yield as number of patients with injury/number of patients who had a CT scan.

RESULTS

Of 3223 patients who met inclusion criteria, 2888 (89.6%) had simultaneously ordered head and neck CT scans. CT yield for CSI in both the head and neck was 0.5% (95% confidence interval [CI] 0.3-0.8%), and the yield for any injury in both the head and neck was 1.4% (95% CI 1.0-1.8%). The yield for CSI in one region was higher when CSI was seen in the other region.

CONCLUSIONS

The yield of CT for CSI in both the head and neck concomitantly is very low. When injury is seen in one region, there is higher likelihood of injury in the other. These findings argue against paired ordering of head and neck CT scans and suggest that CT scans should be ordered individually or when injury is detected in one region.

Traumatic subaxial cervical facet subluxation and dislocation: epidemiology, radiographic analyses, and risk factors for spinal cord injury

BACKGROUND CONTEXT

Distractive flexion injuries (DFIs) of the subaxial cervical spine are major contributors to spinal cord injury (SCI). Prompt assessment and early intervention of DFIs associated with SCI are crucial to optimize patient outcome; however, neurologic examination of patients with subaxial cervical injury is often difficult, as patients commonly present with reduced levels of consciousness. Therefore, it is important to establish potential associations between injury epidemiology and radiographic features, and neurologic involvement.

PURPOSE

The aims of this study were to describe the epidemiology and radiographic features of DFIs presenting to a major Australian tertiary hospital and to identify those factors predictive of SCI. The agreement and repeatability of radiographic measures of DFI severity were also investigated.

STUDY DESIGN/SETTING

This is a combined retrospective case-control and reliability-agreement study.

PATIENT SAMPLE

Two hundred twenty-six patients (median age 40 years [interquartile range = 34]; 72.1% male) who presented with a DFI of the subaxial cervical spine between 2003 and 2013 were reviewed.

OUTCOME MEASURES

The epidemiology and radiographic features of DFI, and risk factors for SCI were identified. Inter- and intraobserver agreement of radiographic measurements was evaluated.

METHODS

Medical records, radiographs, and computed tomography and magnetic resonance imaging scans were examined, and the presence of SCI was evaluated. Radiographic images were analyzed by two consultant spinal surgeons, and the degree of vertebral translation, facet apposition, spinal canal occlusion, and spinal cord compression were documented. Multivariable logistic regression models identified epidemiology and radiographic features predictive of SCI. Intraclass correlation coefficients (ICCs) examined inter- and intraobserver agreement of radiographic measurements.

RESULTS

The majority of patients (56.2%) sustained a unilateral (51.2%) or a bilateral facet (48.8%) dislocation. The C6-C7 vertebral level was most commonly involved (38.5%). Younger adults were over-represented among motor-vehicle accidents, whereas falls contributed to a majority of DFIs sustained by older adults. Greater vertebral translation, together with lower facet apposition, distinguished facet dislocation from subluxation. Dislocation, bilateral facet injury, reduced Glasgow Coma Scale, spinal canal occlusion, and spinal cord compression were predictive of neurologic deficit. Radiographic measurements demonstrated at least a "moderate" agreement (ICC>0.4), with most demonstrating an "almost perfect" reproducibility.

CONCLUSIONS

This large-scale cohort investigation of DFIs in the cervical spine describes radiographic features that distinguish facet dislocation from subluxation, and associates highly reproducible anatomical and clinical indices to the occurrence of concomitant SCI.

Does the novel lateral trauma position cause more motion in an unstable cervical spine injury than the logroll maneuver?

OBJECTIVE

Prehospital personnel who lack advanced airway management training must rely on basic techniques when transporting unconscious trauma patients. The supine position is associated with a loss of airway patency when compared to lateral recumbent positions. Thus, an inherent conflict exists between securing an open airway using the recovery position and maintaining spinal immobilization in the supine position. The lateral trauma position is a novel technique that aims to combine airway management with spinal precautions. The objective of this study was to compare the spinal motion allowed by the novel lateral trauma position and the well-established log-roll maneuver.

METHODS

Using a full-body cadaver model with an induced globally unstable cervical spine (C5-C6) lesion, we investigated the mean range of motion (ROM) produced at the site of the injury in six dimensions by performing the two maneuvers using an electromagnetic tracking device.

RESULTS

Compared to the log-roll maneuver, the lateral trauma position caused similar mean ROM in five of the six dimensions. Only medial/lateral linear motion was significantly greater in the lateral trauma position (1.4mm (95% confidence interval [CI] 0.4, 2.4mm)).

CONCLUSIONS

In this cadaver study, the novel lateral trauma position and the well-established log-roll maneuver resulted in comparable amounts of motion in an unstable cervical spine injury model. We suggest that the lateral trauma position may be considered for unconscious non-intubated trauma patients.

Head injuries and the risk of concurrent cervical spine fractures

BACKGROUND

Cervical spine injuries of variable severity are common among patients with an acute traumatic brain injury (TBI). We hypothesised that TBI patients with positive head computed tomography (CT) scans would have a significantly higher risk of having an associated cervical spine fracture compared to patients with negative head CT scans.

METHOD

This widely generalisable retrospective sample was derived from 3,023 consecutive patients, who, due to an acute head injury (HI), underwent head CT at the Emergency Department of Tampere University Hospital (August 2010-July 2012). Medical records were reviewed to identify the individuals whose cervical spine was CT-imaged within 1 week after primary head CT due to a clinical suspicion of a cervical spine injury (CSI) (n = 1,091).

RESULTS

Of the whole cranio-cervically CT-imaged sample (n = 1,091), 24.7% (n = 269) had an acute CT-positive TBI. Car accidents 22.4% (n = 244) and falls 47.8% (n = 521) were the most frequent injury mechanisms. On cervical CT, any type of fracture was found in 6.6% (n = 72) and dislocation and/or subluxation in 2.8% (n = 31) of the patients. The patients with acute traumatic intracranial lesions had significantly (p = 0.04; OR = 1.689) more cervical spine fractures (9.3%, n = 25) compared to head CT-negative patients (5.7%, n = 47). On an individual cervical column level, head CT positivity was especially related to C6 fractures (p = 0.031, OR = 2.769). Patients with cervical spine fractures (n = 72) had altogether 101 fractured vertebrae, which were most often C2 (22.8, n = 23), C7 (19.8%, n = 20) and C6 (16.8%, n = 17).

CONCLUSIONS

Head trauma patients with acute intracranial lesions on CT have a higher risk for cervical spine fractures in comparison to patients with a CT-negative head injury. Although statistically significant, the difference in fracture rate was small. However, based on these results, we suggest that cervical spine fractures should be acknowledged when treating CT-positive TBIs.

C-spine injury and mandibular fractures: lifesaver broken in two spots

BACKGROUND

Trauma is a leading cause of injury and mortality and may involve mandibular fractures and cervical spine injuries. Manipulation of the spine during trauma protocols and operative treatment has the potential to cause serious spinal cord injuries. The purpose of this study was to identify risk factors associated with cervical spine injury (CSI) in patients with mandibular fractures.

METHODS

The National Trauma Databank (2007-2010) was used to identify patients with mandibular fractures.

RESULTS

A total of 59,028 patients were identified and separated into adult and pediatric cohorts. There were 50,711 adults (86%) and 8317 children (14%). There were statistically significant lower rates of associated CSI in pediatric patients than adults (3.5% versus 7.3%, P < 0.01). Predictors of associated CSI in mandible fractures for both adults and children were older age, lower Glasgow Coma Scale, thoracic injuries, firearm or motor vehicle accident mechanisms, and symphyseal fractures. In the pediatric cohort, body, ramus, and subcondylar fractures were significantly associated with CSI. In adults, female gender, and upper extremity, abdominopelvic, and head injuries were also significantly associated with CSI.

CONCLUSIONS

Multiple mandibular fractures were inversely correlated with CSI. One possibility is that energy dissipation in the mandible with multiple fractures is protective of the C-spine leading to fewer fractures. Children and adults had different associations in the pattern of mandible fractures concomitant with CSI. This has implications in management, imaging, and workup of trauma patients.

Canadian C-Spine Rule study for alert and stable trauma patients: I. Background and rationale

This paper is Part I of a 2-part series to describe the background and methodology for the Canadian C-Spine Rule study to develop a clinical decision rule for rational imaging in alert and stable trauma patients. Current use of radiography is inefficient and variable, in part because there has been a lack of evidence-based guidelines to assist emergency physicians. Clinical decision rules are research-based decision-making tools that incorporate 3 or more variables from the history, physical examination or simple tests. The Canadian CT Head and C-Spine (CCC) Study is a large collaborative effort to develop clinical decision rules for the use of CT head in minor head injury and for the use of cervical spine radiography in alert and stable trauma victims. Part I details the background and rationale for the development of the Canadian C-Spine Rule. Part II will describe in detail the objectives and methods of the Canadian C-Spine Rule study.

A review of cervical spine injury associated with maxillofacial trauma at a UK tertiary referral centre

INTRODUCTION

The aim of this study was to determine the incidence and patterns of cervical spine injury (CSI) associated with maxillofacial fractures at a UK trauma centre.

METHODS

A retrospective analysis was conducted of 714 maxillofacial fracture patients presenting to a single trauma centre between 2006 and 2012.

RESULTS

Of the 714 maxillofacial fracture patients, 2.2% had associated CSI including a fracture, cord contusion or disc herniation. In comparison, 1.0% of patients without maxillofacial trauma sustained a CSI (odds ratio: 2.2, p=0.01). The majority (88%) of CSI cases of were caused by a road traffic accident (RTA) with the remainder due to falls. While 8.8% of RTA related maxillofacial trauma patients sustained a CSI, only 2.0% of fall related patients did (p=0.03, not significant). Most (70%) of the CSIs occurred at C1/C2 or C6/C7 levels. Overall, 455, 220 and 39 patients suffered non-mandibular, isolated mandibular and mixed mandibular/non-mandibular fractures respectively. Their respective incidences of CSI were 1.5%, 1.8% and 12.8% (p=0.005, significant). Twelve patients with concomitant CSI had their maxillofacial fractures treated within twenty-four hours and all were treated within four days.

CONCLUSIONS

The presence of maxillofacial trauma mandates exclusion and prompt management of cervical spine injury, particularly in RTA and trauma cases involving combined facial fracture patterns. This approach will facilitate management of maxillofacial fractures within an optimum time period.

Incidence of traumatic cervical spine fractures in the Norwegian population: a national registry study

BACKGROUND

The incidence of cervical spine fractures (CS-fx) in the general population is sparingly assessed. The aim of the current study was to estimate the incidence of traumatic CS-fx and of open surgery of cervical spine injuries in the Norwegian population.

METHODS

The Norwegian Patient Register (NPR) is an administrative database that contains activity data from all Norwegian government-owned hospitals and outpatient clinics. The diagnoses and procedures are coded according to the International Statistical Classification of Diseases and Related Health Problems (ICD-10) and the NOMESCO Classification of Surgical Procedures (NCSP), respectively. We retrieved information on all severe traumatic cervical spine injuries between 2009 and 2012 from the NPR. Updated information on the date of death is included through routine linkage to the General Register Office.

RESULTS

Between 2009 and 2012, a total of 3 248 patients met our criteria for severe traumatic cervical spine injury. A total of 2 963 patients had one or more CS-fx, and 285 had severe non-fracture cervical spine injuries. The median age was 54 years, and 69% of the patients were male. The incidence of CS-fx and severe non-fracture injuries in the total Norwegian population was 16.5/100 000/year, and the incidence of CS-fx was 15.0/100 000/year. A total of 18% of the patients were treated with open surgery, resulting in an estimated incidence of surgery for acute traumatic cervical spine injury of 3.0/100 000/ year in the Norwegian population. The 1- and 3-month mortality rates were 4% and 6%, respectively.

The epidemiology of traumatic cervical spine fractures: a prospective population study from Norway

Aim

The aim of this study was to estimate the incidence of traumatic cervical spine fractures (CS-fx) in a general population.

Background

The incidence of CS-fx in the general population is largely unknown.

Methods

All CS-fx (C0/C1 to C7/Th1) patients diagnosed with cervical-CT in Southeast Norway (2.7 million inhabitants) during the time period from April 27, 2010-April 26, 2011 were prospectively registered in this observational cohort study.

Results

Over a one-year period, 319 patients with CS-fx at one or more levels were registered, constituting an estimated incidence of 11.8/100,000/year. The median age of the patients was 56 years (range 4–101 years), and 68% were males. The relative incidence of CS-fx increased significantly with age. The trauma mechanisms were falls in 60%, motorized vehicle accidents in 21%, bicycling in 8%, diving in 4% and others in 7% of patients. Neurological status was normal in 79%, 5% had a radiculopathy, 8% had an incomplete spinal cord injury (SCI), 2% had a complete SCI, and neurological function could not be determined in 6%. The mortality rates after 1 and 3 months were 7 and 9%, respectively. Among 319 patients, 26.6% were treated with open surgery, 68.7% were treated with external immobilization with a stiff collar and 4.7% were considered stable and not in need of any specific treatment. The estimated incidence of surgically treated CS-fx in our population was 3.1/100,000/year.

Conclusions

This study estimates the incidence of traumatic CS-fx in a general Norwegian population to be 11.8/100,000/year. A male predominance was observed and the incidence increased with increasing age. Falls were the most common trauma mechanism, and SCI was observed in 10%. The 1- and 3-month mortality rates were 7 and 9%, respectively. The incidence of open surgery for the fixation of CS-fx in this population was 3.1/100,000/year.

Level of evidence

This is a prospective observational cohort study and level II-2 according to US Preventive Services Task Force.

Risk factors for cervical spine injury

INTRODUCTION

The early recognition of cervical spine injury remains a top priority of acute trauma care. Missed diagnoses can lead to exacerbation of an existing injury and potentially devastating consequences. We sought to identify predictors of cervical spine injury.

METHODS

Trauma registry records for blunt trauma patients cared for at a Level I Trauma Centre from 1997 to 2002 were examined. Cervical spine injury included all cervical dislocations, fractures, fractures with spinal cord injury, and isolated spinal cord injuries. Univariate and adjusted odds ratios (ORs) were calculated to identify potential risk factors. Variables and two-way interaction terms were subjected to multivariate analysis using backward conditional stepwise logistic regression.

RESULTS

Data from 18,644 patients, with 55,609 injuries, were examined. A total of 1255 individuals (6.7%) had cervical spine injuries. Motor Vehicle Collision (MVC) (odds ratio (OR) of 1.61 (1.26, 2.06)), fall (OR of 2.14 (1.63, 2.79)), age <40 (OR of 1.75 (1.38-2.17)), pelvic fracture (OR of 9.18 (6.96, 12.11)), Injury Severity Score (ISS) >15 (OR of 7.55 (6.16-9.25)), were all significant individual predictors of cervical spine injury. Neither facial fracture nor head injury alone were associated with an increased risk of cervical spine injury. Significant interactions between pelvic fracture and fall and pelvic fracture and head injury were associated with a markedly increased risk of cervical spine (OR 19.6 (13.1, 28.8)) and (OR 27.2 (10.0-51.3)).

CONCLUSIONS

MVC and falls were independently associated with cervical spine injury. Pelvic fracture and fall and pelvic fracture and head injury, had a greater than multiplicative interaction and high risk for cervical spine injury, warranting increased vigilance in the evaluation of patients with this combination of injuries.

Evaluation of the safety of C-spine clearance by paramedics: design and methodology

BACKGROUND

Canadian Emergency Medical Services annually transport 1.3 million patients with potential neck injuries to local emergency departments. Less than 1% of those patients have a c-spine fracture and even less (0.5%) have a spinal cord injury. Most injuries occur before the arrival of paramedics, not during transport to the hospital, yet most patients are transported in ambulances immobilized. They stay fully immobilized until a bed is available, or until physician assessment and/or X-rays are complete. The prolonged immobilization is often unnecessary and adds to the burden of already overtaxed emergency medical services systems and crowded emergency departments.

METHODS/DESIGN

The goal of this study is to evaluate the safety and potential impact of an active strategy that allows paramedics to assess very low-risk trauma patients using a validated clinical decision rule, the Canadian C-Spine Rule, in order to determine the need for immobilization during transport to the emergency department.This cohort study will be conducted in Ottawa, Canada with one emergency medical service. Paramedics with this service participated in an earlier validation study of the Canadian C-Spine Rule. Three thousand consecutive, alert, stable adult trauma patients with a potential c-spine injury will be enrolled in the study and evaluated using the Canadian C-Spine Rule to determine the need for immobilization. The outcomes that will be assessed include measures of safety (numbers of missed fractures and serious adverse outcomes), measures of clinical impact (proportion of patients transported without immobilization, key time intervals) and performance of the Rule.

DISCUSSION

Approximately 40% of all very low-risk trauma patients could be transported safely, without c-spine immobilization, if paramedics were empowered to make clinical decisions using the Canadian C-Spine Rule. This safety study is an essential step before allowing all paramedics across Canada to selectively immobilize trauma victims before transport. Once safety and potential impact are established, we intend to implement a multi-centre study to study actual impact.

`Clearing' the cervical spine in conscious trauma patients

This is a systematic review of published evidence regarding management of the cervical spine in conscious and co-operative trauma patients. We examine the literature in the following sections: clinical evaluation of the cervical spine; use of plain radiography; use of additional radiographic views; use of computed tomography; use of magnetic resonance imaging. Finally we consider the elderly and paediatric populations, particularly where there are significant differences compared to the general adult population. This paper also reviews the literature regarding non-medical assessment of the cervical spine. We conclude that there are well-validated decision rules available to guide the clinician, and that each imaging strategy has distinct advantages and disadvantages. Familiarity with these issues provides a sound basis for safe and effective decision-making.

The use of hospital registries in orthopaedic surgery

A hospital registry is a collection of prospectively recorded information about patients who have a specific condition or who received a specific type of treatment. Hospital registries are beneficial for the patient, physicians, and administrators and serve several purposes, with the primary purpose being quality control. This article focuses on the role of registries at the hospital level and their advantages compared with other data sets. We also discuss how to implement a hospital registry and how to ascertain registry quality. Finally, we describe the problems inherent in any hospital-based registry and the ways in which the data collected in a registry can be appropriately analyzed.

Artificial neural network in predicting craniocervical junction injury: an alternative approach to trauma patients

OBJECTIVE

The aim of this study is to determine the efficiency of artificial intelligence in detecting craniocervical junction injuries by using an artificial neural network (ANN) that may be applicable in future studies of different traumatic injuries.

MATERIALS AND METHODS

Major head trauma patients with Glasgow Coma Scale <or=8 of all age groups who presented to the Emergency Department were included in the study. All patients underwent brain computerized tomography (CT), craniocervical junction CT, and cervical plain radiography. A feedforward with back propagation ANN and a stepwise forward logistic regression were performed to test the performances of all models.

RESULTS

A total of 127 patients fulfilling inclusion criteria were included in the study. The mean age of the study patients was 31+/-17.7, 77.2% (n=98) of them were male, 13.4% of the patients (n=17) had craniocervical junction pathologies. About 64.7% (n=11) of these pathologies were detected only by CT; 23.5% (n=4) of them by both craniocervical CT and cervical plain radiography; and 11.8% (n=2) of them only by cervical plain radiography. A logistic regression model had a sensitivity of 11.8% and specificity of 99.1%. Positive predictive value was 66.7% and negative predictive value was 87.9%. Area under the curve for logistic regression model was 0.794 (P=0.000). ANN had a sensitivity of 82.4% and specificity of 100%. Positive predictive value was 100% and negative predictive value was 97.3%. Area under the curve for ANN model was 0.912 (P=0.000).

CONCLUSION

ANN as an artificial intelligence application seems appropriate for detecting and excluding craniocervical junction injury but it should not replace craniocervical junction CT. However, these findings should lead us to test the applicability of ANN on hard-to-diagnose trauma patients or in constructing clinical decision rules.

Prevalence of cervical spinal injury in trauma

Object

Diagnosis of cervical spinal injury (CSI) is an essential aspect of the trauma evaluation. This task is especially difficult in patients who are not clinically able to be evaluated (unevaluable) because of distracting painful injuries, intoxication, or concomitant head injury. For this population, the appropriate use of advanced imaging techniques for cervical spinal clearance remains undetermined. This study was undertaken to estimate the prevalence of unstable CSI, particularly among patients in whom clinical evaluation is impossible or unreliable.

Methods

Estimates of the prevalence of CSI in populations consisting of all trauma patients, alert patients only, and clinically unevaluable patients only were determined by variance-weighted pooling of data from 65 publications (281,864 patients) that met criteria for review.

Results

The overall prevalence of CSI among all trauma patients was 3.7%. The prevalence of CSI in alert patients was 2.8%, whereas unevaluable patients were at increased risk of CSI with a prevalence of 7.7% (p = 0.007). Overall, 41.9% of all CSI cases were considered to exhibit instability.

Conclusions

Trauma patients who are clinically unevaluable have a higher prevalence of CSI than alert patients. Knowledge of the prevalence and risk of such injuries may help establish an evidence-based approach to the detection and management of clinically occult CSI.

An evidenced-based approach to radiographic assessment of cervical spine injuries in the emergency department

The modern approach to suspected cervical spine injuries is highly dependent on appropriate utilization of radiographic studies. Clinical decision rules have been developed for determination of those most likely to benefit from plain film studies, but there is confusion regarding those who should undergo computed tomography (CT) scanning. This case-based review highlights current available evidence and provides a framework to guide emergency medicine providers in the treatment of patients with trauma to the cervical spine.

Spinal injuries in pedestrians struck by motor vehicles

STUDY DESIGN

Retrospective study of consecutive patients that were struck by motor vehicles and sustained spinal injuries over a 6-year period from 1997 to 2003.

OBJECTIVE

To determine spinal injury patterns and associated injuries in pedestrians struck by motor vehicles.

SUMMARY OF BACKGROUND DATA

Motor vehicle accidents involving pedestrians are associated with high morbidity and mortality rates.

METHODS

All injured patients admitted to Level I Trauma and Regional Spinal Cord Injury Center were reviewed retrospectively to identify those who were struck by motor vehicles and sustained injury to the spinal column. Before 2001, clearance of the thoracolumbar (TL) spine was performed by plain radiographs. Beginning in 2001, such clearance was performed by helical truncal computed tomography of the chest/abdomen/pelvis (CT/CAP) that was performed to evaluate potential visceral injuries.

RESULTS

Of the 1672 patients who were struck by motor vehicles, 135 patients (8%) were found to have spinal injuries. Cervical injuries were found in 35%, thoracic in 19%, lumbar in 37%, and sacral injuries in 27%. Associated injuries were present in 99% of the patients. By relative risk analyses, there were no regional associations between injuries of the TL spine and injuries to the chest and abdomen. Patients frequently had combinations of injuries in distant locations, presumably from a "double-impact" injury mechanism. Before initiation of the CT/CAP protocol to clear the TL spine, 7% of patients had injuries initially missed by TL radiographs.

CONCLUSIONS

Spinal injuries in pedestrians struck by motor vehicles are more evenly distributed throughout the spinal column and more often coexist with injuries to remote organs compared with car occupants and motorcyclists where regional tendencies and isolated spinal injuries are more frequent. A systematic approach to both diagnosis and treatment is, therefore, necessary. Helical truncal CT, performed to evaluate visceral injury, effectively screens for TL fractures.

The use of dynamic CT surview for cervical spine clearance in comatose trauma patients: a pilot prospective study

BACKGROUND

Bedside flexion and extension fluoroscopy was proposed for detecting occult ligamentous instability in comatose trauma patients. Nevertheless, a recent study showed that the C7-T1 motion segment is rarely visualised by this technique. We propose a new method for clearing the cervical spine in comatose patients.

METHODS

We conducted a prospective clinical pilot study on 31 consecutive comatose trauma patients to evaluate a new dynamic imaging technique for cervical spine clearance in comatose trauma patients. All patients were examined by a fine-cut helical CT scan of the entire cervical spine (C-spine) and by four-stage flexion-extension examination using the surview function of the CT scanner. The mean range of motion between extension and full flexion, the lowest visualised vertebrae, complications, positive findings, and the time from arrival to clearance was recorded.

RESULTS

The mean range of motion of the subaxial cervical spine was 39 degrees . The C7-T1 segment was fully visualised at the CT surview in 15 patients. The C6-C7 segment was visualised in all patients. No complication directly related to the study protocol was observed. C-spine clearance was completed in less than 6h from arrival in 26 patients.

CONCLUSION

The CT surview allows better visualisation of the C6-C7 and cervicothoracic junctions during flexion and extension. A short series of CT cuts can be used when visualisation is inadequate. Further studies are needed to assess the risks and benefits of the suggested protocol.

Pattern, management and outcome of cervical spine injuries associated with head injuries in paediatric patients

INTRODUCTION

This study examines the management and outcome of cervical spine injuries in children with head injuries, to assess the need for surgical treatment.

MATERIAL AND METHODS

We performed a retrospective analysis (1995-2005) of 445 children admitted intubated and ventilated to the intensive care unit with head injuries.

OUTCOME MEASURES

Frankel grade for spinal injuries and Glasgow Outcome Scale (GOS) for head injuries.

RESULTS

Cervical spine injuries were detected in 11 patients (incidence 2.5%, mean age: 6.3 years, range: 21 months-15 years). The injuries were: C1/2 distraction: 2; C1/2 subluxation: 2; odontoid peg fracture with C1/2 dislocation and cord transection: 1; disruption of posterior longitudinal ligament at C2: 1; odontoid peg fracture with C2/3 distraction: 1; C2/3 subluxation: 1; C3 lamina fracture: 1; C3/4 facet fracture: 1; C6/7 fracture dislocation with cord transection: 1. One patient was managed operatively, ten patients nonoperatively, two with halo vests and eight with hard collars. There were three deaths (mortality 27%) associated with severe head injuries. At 6 months follow-up, two patients remained quadriplegic (Frankel Grade A), one of them ventilator dependent, one had residual motor function but of no practical use (Frankel Grade C), five had good spinal outcome (Frankel Grade E). Seven patients had good head injury outcomes (GOS 5), one remained disabled (GOS 3).

CONCLUSION

Most children with cervical injury can be managed nonoperatively with good outcomes. Surgical management may be necessary in severe unstable injuries.

A Retrospective Study of Five Clinical Criteria and One Age Criterion for Selective Prehospital Spinal Immobilization

Full spinal immobilization of blunt trauma victims is a widely accepted prehospital measure, applied in order to prevent (further) damage to the spinal cord. However, looking at the marginal evidence that exists for the effectiveness of spinal immobilization, and the growing evidence for the negative effects following immobilization, a more selective protocol might be able to reduce possible morbidity and mortality as good as the present prehospital immobilization protocol. In a retrospective study, the sensitivity of a selective prehospital immobilization protocol that adds an age criterion to five clinical spine clearance criteria is examined.

MATERIALS AND METHODS

Based on ICD-9 codes, all patients admitted to the trauma center diagnosed with spinal fractures with or without spinal damage were identified. The sensitivity of the combination of five clinical criteria (reduced awareness, evidence of intoxication, neurological deficit, pain of the spine on palpation, (significant) distracting injury) and an age criterion (65 years or older at time of accident) was determined. If one or more criteria were positive, standard full immobilization would be indicated. The other patients would not have been immobilized.

RESULTS

A total of 238 blunt trauma victims primarily admitted to the trauma center were included for this study. Median age of the included patients was 39 years (range 5-98), with 32.8% female. A total of 236 had at least one positive criterion (sensitivity 99.2%). The two missed patients were male, 40 and 41 years old. Radiology showed a small fissure in the arch of C2, and a transverse process fracture of L3, respectively. Both patients were discharged the next day without complications or medical interventions.

CONCLUSION

In this retrospective study, a selective protocol based on clinical criteria instead of trauma mechanism showed 99.2% sensitivity for spinal fractures with or without spinal cord damage. Based on this study and the current controversy surrounding spinal immobilization, a prospective study should be considered to evaluate the five clinical criteria and one age criterion in the prehospital setting.

Cervical spine injury is highly dependent on the mechanism of injury following blunt and penetrating assault

BACKGROUND

The mechanism of injury has not been highly regarded as an important variable when evaluating cervical spine injuries. The aim of this study was to determine the incidence of cervical spine fracture (CSF) and cervical spinal cord injury (CSCI) based on mechanism following blunt and penetrating assault to better aid prioritization of management.

METHODS

Retrospective analysis from two large urban Level I trauma centers over 87 and 144 months caused by gunshot wounds (GSW), stab wounds (SW) or blunt assault (BA).

RESULTS

During the study period, there were 57,532 trauma patients evaluated at the two trauma centers, of which 42.3% were following blunt or penetrating assault. The rates of CSF and CSCI for the various mechanisms were similar between the two centers. The rates for having CSF were significantly different (p < 0.05) for the various mechanisms. GSW (1.35%) was the highest followed by BA (0.41%) and then SW (0.12%). The rates of CSCI for GSW (0.94%) were significantly (p < 0.05) higher than BA (0.14%) and SW (0.11%). For GSW patients, all patients with CSF or CSCI had a point of entry between the ears and the nipple. For SW patients, the wound was directly in the neck below the mandible and above the trapezius muscle. Although many of the SW patients also suffered blunt assault, none of the CSF or CSCI injuries were from blunt forces. In addition, all patients, both blunt and penetrating who had CSCI had neurologic deficit at the time of presentation. Surgical stabilization or tongs were applied in 15.5% (26 of 168) of the GSWs, 27.8% (3 of 11) of the SWs and 31.6% (6 of 19) of the BA patients. There was a BA patient (1 of 4,390) patient with CSF that was neurologically intact that required surgical stabilization and this patient had neck pain on admission. No penetrating injury patients with CSCI regained significant neurologic recovery during the hospitalization.

SUMMARY

The rate of CSF or CSCI is low following assault and dependent on mechanism of injury. Thus the concern and extent of evaluation should also be dependent on the mechanism of injury. Neurologic deficits from penetrating assault were established and final at the time of presentation. Concern for protecting the neck should not hinder the evaluation process or life saving procedures.

Caring for the patients with cervical spine injuries: what have we learned?

PURPOSE

Anesthesiologists are often involved in the early management and resuscitation of patients who have sustained cervical spine injuries (CSIs). The most crucial step in managing a patient with suspected CSI is the prevention of further insult to the cervical spine (C-spine). In this review, important factors related to initial management, diagnosis, airway and anesthetic management of patients with CSI are presented.

SOURCE

Medline search was performed to seek out the English-language literature using the following phrases and keywords: spine trauma; cervical spine; airway management after CSI.

PRINCIPAL FINDINGS

Cervical spine injury occurs in up to 3% to 6% of all patients with trauma. The initial management of a patient with potential spine injury requires a high degree of suspicion for CSI so that early stabilization of the spine can be used to prevent further neurological damage. Diagnostic radiology has a critical role to play; however, clinical evaluation is equally important in excluding CSI in a conscious and cooperative patient. Although in-line stabilization reduces the movement at C-spine, traction causes clinically significant distraction and should be avoided.

CONCLUSION

A high level of suspicion and anticipation are the major components of decision making and management in a patient with CSI. Endotracheal intubation using the Bullard laryngoscope may have some advantages over other techniques as it causes less head and C-spine extension than the conventional laryngoscope, and this results in a better view. However, the current opinion is that oral intubation using a Macintosh blade after intravenous induction of anesthesia and muscle relaxation along with inline stabilization is the safest and quickest way to achieve intubation in a patient with suspected CSI. In summation caution, close care and maintenance of spinal immobilization are more important factors in limiting the risk of secondary neurological injury than any particular technique.

[Evidence based diagnostic procedures for the determination of suspected blunt cervical spine injuries. Development of an algorithm]

BACKGROUND

The aim of this study was to present existing publications, describing various diagnostic procedures as well as considering the evidence supporting them, to develop a recommendation for diagnosis.

MATERIAL AND METHODS

We reviewed relevant publications between 1966 and 2004 by a systemic literature search in MEDLINE, EMBASE, National Guideline Clearinghouse, Cochrane Library as well as a manual reference search. Keywords were cervical spine, cervical vertebrae, spinal, spinal cord, injury, trauma, fracture, dislocation, imaging, radiography, flexion, extension, fluoroscopy, computed tomography, computed scanning, and magnetic resonance imaging. The selected search results were then classified into levels of evidence.

RESULTS

From among a total of 10,000 publications, 137 relevant publications were stringently reviewed. The level of evidence is on the whole limited due to deficit data; therefore, only class II-III recommendations are possible. We developed an algorithm for the diagnostic approach to suspected trauma of the cervical spine. This clinical algorithm displays the complex diagnosis of cervical spine injury in a clear and logically structured process.

CONCLUSIONS

The diagnostic algorithm for cervical spine injury meets the presently required standards and maximizes care for the newly injured. The development, which can be followed using evidence-based medicine, is transparent and therefore aids the decision process when choosing an adequate diagnostic procedure.

Emergency care in facial trauma--a maxillofacial and ophthalmic perspective

Facial trauma, with or without life- and sight-threatening complications, may arise following isolated injury, or it may be associated with significant injuries elsewhere. Assessment needs to be both systematic and repeated, with the establishment of clearly stated priorities in overall care. Although the American College of Surgeons Advanced Trauma Life Support (ATLS) system of care is generally accepted as the gold standard in trauma care, it has potential pitfalls when managing maxillofacial injuries, which are discussed. Management of facial trauma can arguably be regarded as "facial orthopaedics", as both specialities share common management principles. This review outlines a working approach to the identification and management of life- and sight-threatening conditions following significant facial trauma.

Cervical spine clearance: a review

Ethical concerns have hindered any randomised control blinded studies on the imaging required to assess the cervical spine in an unconscious trauma patient. The issue has been contentious for many years and has resulted in burgeoning but inconclusive guidance. MRI and multislice CT technology have made rapid advances, but the literature is slower to catch up. Never the less there appears to be an emerging consensus for the multiply injured patient. The rapid primary clinical survey should be followed by lateral cervical spine, chest and pelvic radiographs. If a patient is unconscious then CT of the brain and at least down to C3 (and in the USA down to D1) has now become routine. The cranio-cervical scans should be a maximum of 2 mm thickness, and probably less, as undisplaced type II peg fractures, can be invisible even on 1 mm slices with reconstructions. If the lateral cervical radiograph and the CT scan are negative, then MRI is the investigation of choice to exclude instability. Patients with focal neurological signs, evidence of cord or disc injury, and patients whose surgery require pre-operative cord assessment should be imaged by MRI. It is also the investigation of choice for evaluating the complications and late sequela of trauma. If the patient is to have an MRI scan, the MR unit must be able to at least do a sagittal STIR sequence of the entire vertebral column to exclude non-contiguous injuries, which, since the advent of MRI, are now known to be relatively common. Any areas of oedema or collapse then require detailed CT evaluation. It is important that cases are handled by a suitably skilled multidisciplinary team, and avoid repeat imaging due to technical inadequacies. The aim of this review is to re-examine the role of cervical spine imaging in the context of new guidelines and technical advances in imaging techniques.

Clearing the cervical spine in unconscious polytrauma victims, balancing risks and effective screening

Cervical spine injury occurs in 5-10% of cases of blunt polytrauma. A missed or delayed diagnosis of cervical spine injury may be associated with permanent neurological sequelae. However, there is no consensus about the ideal evaluation and management of the potentially injured cervical spine and, despite the publication of numerous clinical guidelines, this issue remains controversial. In addition, many studies are limited in their application to the obtunded or unconscious trauma victim. This review will provide the clinician managing unconscious trauma victims with an assessment of the actual performance of clinical examination and imaging modalities in detecting cervical spine and isolated ligamentous injury, a review of existing guidelines in light of the available evidence, relative risk estimates and a proposed management scheme.

The prevalence and causes of maxillofacial fractures in patients attending Accident and Emergency Departments in Recife-Brazil

AIM

This study aimed to investigate the epidemiological characteristics of maxillofacial fractures among patients admitted to the Accident and Emergency Departments of three major hospitals in Recife, Brazil.

MATERIAL AND METHODS

A prospective design. The data were collected from each hospital over 3 months. A timetable was developed which randomly allocated visits to the three hospitals, six times a week for 6 hours a day. Data on socio-demographic variables, presence of bone fractures and/or maxillofacial fractures, type of injuries, aetiological factors, and place of occurrence were recorded.

RESULTS

The final sample size was 5,644 patients. The prevalence of any bone fractures was 32.1% and for maxillofacial fractures 4.1%. Multiple logistic regression analysis showed that maxillofacial fractures were related to age, sex and level of education but not to employment status. Violence was the main cause of maxillofacial fractures, and the most frequent place of occurrence was the street.

CONCLUSIONS

Maxillofacial fractures represented 12.6% of all bone fractures, males and less educated subjects were more likely to be affected than their females and more educated counterparts, and violence was the most common cause.

Are Five-View Plain Films of the Cervical Spine Unreliable? A Prospective Evaluation in Blunt Trauma Patients with Altered Mental Status

OBJECTIVES

Clearing the cervical spine in a time-sensitive fashion is difficult. We hypothesized that admission computed tomographic scan of the occiput to T1 (CTS) with multiplanar reformatted images will replace five-view (odontoid, anteroposterior, lateral, and oblique) plain films of the cervical spine (CSX) in the initial evaluation of blunt trauma patients with altered mental status.

METHODS

Between January and July 2001, all patients aged 16 years or older with altered mental status undergoing both CTS and CSX were prospectively entered into the study group. Attending physician interpretation defined the presence of cervical spine injury. Unstable fractures were defined as requiring surgical or halo stabilization.

RESULTS

One thousand six patients met study criteria. One hundred sixteen patients had 172 cervical spine injuries (CSIs) (fracture and subluxation). CSX missed 90 of 172 (52.3%) CSIs in 65 of 172 (56.0%) patients. Anatomically, CSX failed to identify 14 of 15 occipital fractures (93.3%), 17 of 36 (47.2%) C1-3 fractures, and 59 of 121 (48.8%) C4-T1 CSIs. CSX failed to identify 5 of 29 (17.2%) patients with unstable CSIs. CTS failed to diagnose 3 of 172 (1.7%) CSIs that were stable (spinous process fractures at C6-7). Two patients exhibited spinal cord injury without radiologic abnormality missed by both modalities. CTS had a sensitivity of 97.4%, a specificity of 100%, a prevalence of 11.5%, a positive predictive value of 100%, and a negative predictive value of 99.7%. CSX had a sensitivity of 44.0%, a specificity of 100%, a prevalence of 11.5%, a positive predictive value of 100%, and a negative predictive value of 93.2%.

CONCLUSION

CTS outperformed five-view CSX in a group of patients with altered mental status or distracting injuries. Five-view CSX failed to diagnose 52.3% of cervical spine fractures identified by CTS. Five-view CSX failed to diagnose five patients with unstable cervical fractures and failed to identify 93.3% of patients with occipital condyle fractures.

Severity of Cervical Spine Ligamentous Injury Correlates with Mechanism of Injury, Not with Severity of Blunt Head Trauma

Clearance of the cervical spine (CS) in obtunded trauma patients in an intensive care unit is problematic. Patients with no osseous injuries have potential unstable extradural supportive soft tissue injury. Evaluation of the supporting structures involves dynamic fluoroscopy or MRI both of which have inherent risks and convenience issues. Defining which of these patients are at highest risk for severe supportive structure injury may improve resource utilization for CS clearance. The purpose of this study was to evaluate clinical factors that may predict the probability of CS supportive soft tissue injury in patients with traumatic brain injury. Patients who sustained traumatic brain injury with intracranial pathology, absence of CS osseous injury, and a limited cervical spine MRI within 72 hours of injury were included. Potential clinical predictors included the severity of the traumatic brain injury defined by the Abbreviated Injury Severity Score for the cerebrum and initial Glasgow Coma Scale, the Injury Severity Score (ISS), mechanism of injury, and high versus low-velocity mechanism. Severity of soft tissue/ligament injury was graded by MRI findings. One hundred twenty-five patients met the study criteria; 81 had negative MRI findings and in 44 the MRI study was positive for potentially unstable injuries. High-velocity mechanisms of injury and ISS—not the severity of the traumatic brain injury or initial Glasgow Coma Scale score—were statistically significant predictors of severe CS supportive soft tissue injuries. Obtunded blunt trauma patients who have been involved in high-velocity-mechanism incidents and have high ISS are at greatest risk for extradural supportive soft tissue CS injuries. These patients should either remain in CS immobilization until clinical evaluation can be completed or undergo further evaluation of their supportive soft tissue structures by MRI or fluoroscopic flexion/extension.

Cervical spine trauma associated with moderate and severe head injury: incidence, risk factors, and injury characteristics

OBJECT

Diagnosing and managing cervical spine trauma in head-injured patients is problematic due to an altered level of consciousness in such individuals. The reported incidence of cervical spine trauma in head-injured patients has generally ranged from 4 to 8%. In this retrospective study the authors sought to define the incidence of cervical injury in association with moderate or severe brain injury, emphasizing the identification of high-risk patients.

METHODS

The study included 447 consecutive moderately (209 cases) or severely (238 cases) head injured patients who underwent evaluation at two Level 1 trauma centers over a 40-month period. Of the 447 patients, 24 (5.4%) suffered a cervical spine injury (17 men and seven women; mean age 39 years; median Glasgow Coma Scale [GCS] score of 6, range 3-14). Of these 24 patients, 14 (58.3%) sustained spinal cord injuries (SCIs), 14 sustained injuries in the occiput-C3 region, and 10 underwent a stabilization procedure. Of the 14 patients with SCIs, nine experienced an early hypotensive and/or hypoxic insult. Regarding the mechanism of injury, cervical injuries occurred in 21 (8.2%) of 256 patients involved in motor vehicle accidents (MVAs), either as passengers or pedestrians, compared with three (1.6%) of 191 patients with non-MVA-associated trauma (p < 0.01). In the subset of 131 MVA passengers, 13 (9.9%) sustained cervical injuries. Patients with an initial GCS score less than or equal to 8 were more likely to sustain a cervical injury than those with a score higher than 8 (odds ratio [OR] 2.77, 95% confidence interval [CI] = 1.11-7.73) and were more likely to sustain a cervical SCI (OR 5.5, 95% CI 1.22-24.85). At 6 months or more postinjury, functional neurological recovery had occurred in nine patients (37.5%) and eight (33.3%) had died.

CONCLUSIONS

Head-injured patients sustaining MVA-related trauma and those with an initial GCS score less than or equal to 8 are at highest risk for concomitant cervical spine injury. A disproportionate number of these patients sustain high cervical injuries, the majority of which are mechanically unstable and involve an SCI. The development of safer and more rapid means of determining cervical spine integrity should remain a high priority in the care of head-injured patients.

Prevalence of cervical spine injuries in patients with facial trauma

OBJECTIVE

Injuries to the spine may accompany facial trauma. By using a large computerized database the goal of this case control study was to assess the association between facial and cervical spine injuries among patients sustaining facial trauma.

STUDY DESIGN

During a period of 4 years (1995 to 1998) 3083 patients, 10 years or older, with facial injuries were admitted to the University Hospital of Innsbruck's Department of Oral and Maxillofacial Surgery for facial trauma. Records were analyzed for cause of injury, age and gender distribution, frequency and type of injury, and frequency of cervical spine injuries in relation to facial trauma and concomitant injuries. Two hundred six (6.7%) of these patients had experienced a concomitant cervical spine injury (case group). All other patients (2877) were assigned to the control group of facial trauma only.

RESULTS

Facial trauma patients with concomitant cervical spine injuries were significantly older (mean age, 42 vs 34 years); no difference existed for the female/male ratio of 30:70. Sports trauma was the main cause of facial trauma in the control group (37.4%), yet traffic accidents accounted for 43.7% of combined facial and cervical spine injuries in the case group. Central mid face fractures dominated in the case group and lateral mid face fractures in the control group. In the case group cervical spine fractures and dislocations occurred in 19.2%. None of them showed evidence of paralysis. Concomitant brain injuries occurred in 21.6% of the case group and 8.8% of the control group. For patients sustaining facial trauma, logistic regression analysis revealed reduced risks for additional cervical spine injuries in younger patients, female patients, absence of brain injury, and in patients with facial soft tissue lesions alone (58.2%) or dental trauma alone (77.5%).

CONCLUSION

The results of this study underline the importance of proper clinical and computed tomographic evaluation in cases of facial fractures for recognition of additional cervical spine trauma. Detection of cervical spine trauma can be missed, especially when pain or symptoms from other parts of the body dominate. The typical patient with concomitant neck and facial trauma is male, 40 years old, and usually involved in a traffic accident.

Ligamentous injuries of the cervical spine in unreliable blunt trauma patients: incidence, evaluation, and outcome

BACKGROUND

The potential for ligamentous injury of the cervical spine (C-spine) may mandate prolonged neck immobilization via a hard cervical collar in the blunt trauma victim (BTV) with altered sensorium. We investigated the incidence of ligamentous C-spine injuries, and whether applying (post hoc) the practice management guidelines from the Eastern Association for the Surgery of Trauma (three radiograph views plus computed tomographic scan of C1-C2) would have detected the injuries.

METHODS

The study was a 3-year retrospective review of BTVs admitted to the state's Primary Adult Resource Center for trauma from 1996 to 1998. Unreliable patients were defined as those with admission Glasgow Coma Scale score < 15. A rigorous algorithm to clear the C-spine was used. Pure ligamentous C-spine injury was defined as a C-spine having abnormal anatomic alignment, dislocation, subluxation, or listhesis, but without fracture. Demographics, diagnostic studies, presence of neurologic deficit, therapy, survival, and disposition were analyzed.

RESULTS

There were 14,577 BTVs with 614 (4.2%) patients having C-spine injury. There were 2,605 (18%) unreliable patients, with 143 (5.5%) of these having C-spine injury, 129 (90%) having fracture and 14 (10% of BTVs; 0.5% of unreliable patients) having no fracture. Of the 14 unreliable patients with pure ligamentous C-spine injury, 13 had initial diagnosis by supine cross-table lateral radiograph. The one exception had a normal three-view radiographic series, but atlanto-occipital dislocation was diagnosed by computed tomographic scan. Eight patients had upper level injury (C0-C4) and six were lower (C4-C7). Four patients died within 30 minutes after admission, 4 underwent cervical fusion, and 6 were treated with collar only. Five (50%) of the survivors had no apparent neurologic deficit attributed to the C-spine at admission. Nine patients remained institutionalized after discharge and one was discharged home.

CONCLUSION

Ligamentous injuries without fracture of the C-spine are rare. Application of the practice management guidelines developed by the Eastern Association for the Surgery of Trauma for identifying C-spine instability is effective and should facilitate early removal of the cervical collar in unreliable patients.

C-spine injury associated with gunshot wounds to the head: retrospective study and literature review

OBJECTIVE

To determine the incidence of C-spine injury (CSI) associated with gunshot wounds (GSWs) to the head.

METHODS

A retrospective chart review including patients with GSWs to the head and excluding those with penetrating facial/neck trauma was performed. Cervical clearance was by clinical/radiologic criteria in survivors, and autopsy in nonsurvivors. A MEDLINE literature search was performed and relevant articles reviewed.

RESULTS

One hundred seventy-four charts were available for review; 90 had C-spine radiographs (complete series [49], lateral [33], and computed tomographic scan [8]). Of 84 with no radiographs, 29 were clinically cleared, and 55 died (32 cleared at autopsy). Twenty-three died without evaluation. None of the remaining 151 (87%) had CSI. Literature search yielded only three relevant articles. Combining the data from these articles yielded 534 patients, and CSI was excluded in 507 (95%).

CONCLUSION

C-spine immobilization and diagnostic radiography are probably not necessary in patients with isolated GSWs to the head and may complicate and delay emergency airway management.

Radiography versus spiral CT in the evaluation of cervicothoracic junction injuries in polytrauma patients who have undergone intubation

A prospective study was performed over a 1-year period in patients who had sustained blunt trauma, mostly in motor vehicle accidents. All 73 patients (56 male and 17 female; age range, 2-94 years; mean age, 35.2 years) in the study had undergone intubation and ventilation at the trauma site (mean Glasgow Coma Score, 9.9 [range, 3-15]; mean Injury Severity Score, 30.4 [range, 8-75]) and subsequently underwent three-view radiography of the cervical spine and thin-section spiral computed tomography (CT) of the cervicothoracic junction. Spinal fractures were detected in 20 patients and involved the cervicothoracic junction region in 12 cases. In all 12 patients, the fractures were visualized at CT, whereas in seven of 12 patients, conventional radiography failed to demonstrate injuries (transverse process fracture of T1 [n = 1], pedicle and vertebral body fracture of C7 [n = 1], fractures of the first and second ribs [n = 5]). Thus, routine CT of the cervicothoracic junction in a highly select group of severely injured patients helped detect occult fracture in seven of 73 patients (10%); however, most of these fractures were not clinically significant. Larger studies involving a high-risk patient population are needed to confirm these findings.