Penetrating wounds of the neck: principles and some controversies

Diagnostic approach to penetrating neck trauma: What you need to know

ABSTRACT

Diagnostic evaluation of penetrating neck trauma has evolved considerably over the last several decades. The contemporary approach to these injuries is based primarily on clinical signs of injury and multidetector computed tomographic angiography. The neck is evaluated as a unit, rather than relying on the surface anatomy zones in which external injuries are seen to guide the workup of internal injuries. This "no-zone" approach safely spares many patients from negative explorations and unnecessary invasive tests. The purpose of this review is to describe an evidence-based approach to the diagnostic evaluation of penetrating neck trauma, including indications for adjunctive testing beyond physical examination and multidetector computed tomographic angiography.

LEVEL OF EVIDENCE

Literature Synthesis and Expert Opinion; Level V.

Penetrating neck trauma: a case for conservative approach

BACKGROUND

Selective conservative management of penetrating neck trauma is a commonly adopted procedure to manage patients of such trauma. However, at places where trauma services are inadequate on different counts and a low-intensity military conflict is on, relevance of this approach without compromising the safety and well-being of the patient remains to be evaluated.

OBJECTIVES

The study aimed to address the relevance of selective conservative management of penetrating neck trauma in a low-intensity military conflict of Kashmir.

PATIENTS AND METHODS

This was a prospective case study of patients presenting to the ENT Head & Neck Surgery department with penetrating neck trauma for a 2-year period from June 2003 to May 2005. After a careful physical examination in the emergency room, immediate surgical intervention or a careful observation is planned. Relevant investigations in the latter group if indicated by clinical examination determined whether to operate or to continue such approach. The data were collected and analyzed.

RESULTS

Forty-six patients fulfilled the criteria to be included in the study. Eight patients (17.4%) underwent immediate surgical intervention, whereas the remaining patients (78.26%) were carefully observed for a minimum of 24 hours. Two patients of the active observation group required delayed exploration because of the close proximity of projectile to vessels. None of the patients in either group died. There was significant difference between the 2 groups in terms of hospital stay, use of diagnostic tests, and complications.

CONCLUSIONS

Selective conservative management is a cost-effective approach for penetrating neck trauma even in areas where there is relative paucity of advanced trauma services. These results further reinforce the validity of careful physical examination as a reliable tool to guide further management without necessarily resorting to expensive and at times difficult to do diagnostic tests.

Iatrogenic vertebral artery injury during anterior cervical spine surgery

BACKGROUND CONTEXT

Iatrogenic injury to the vertebral artery during an anterior cervical decompression is a rarely mentioned but potentially catastrophic complication.

PURPOSE

This study was designed to examine the incidence and management of iatrogenic vertebral artery injury (IVAI) in a large database.

STUDY DESIGN/SETTING

This was a retrospective study performed at a large teaching institution over a 7-year period (1994-2001).

PATIENT SAMPLE

All anterior cervical spinal procedures performed for herniated or degenerative disc disease, or cervical spondylosis were identified, as were incidences of IVAI. Anterior cervical procedures performed for trauma, neoplasia, or infection were excluded from this study.

OUTCOME MEASURES

Neurological and associated morbidity as well as mortality were recorded.

METHODS

Data were accessed through an institution-wide electronic medical record search through the operative reports of 10 spine surgeons. Hospital and clinical charts of IVAI cases were subsequently reviewed. Demographic data and intraoperative strategies for repair were recorded.

RESULTS

A total of 1,976 patients underwent anterior cervical spinal procedures in the review period. Six cases of IVAI were identified. In three of the six patients, arterial bleeding was controlled with hemostatic agents. Of these three, two suffered complications. The initial management of controlling arterial bleeding is by hemostatic agents; however, one must also consider repair or ligation. The remaining three patients were treated with primary repair or ligation, and no complications were noted.

CONCLUSIONS

IVAI is a rare complication (0.3%) of anterior cervical procedures. The arterial bleeding can usually be controlled with topical hemostatic agents, but mortality may occur in instances where it cannot be adequately addressed in a timely fashion.

Computed tomographic scan can be used for surgical decision making in zone II penetrating neck injuries

BACKGROUND

Controversy surrounds the evaluation of zone II penetrating neck injuries. Current literature supports mandatory exploration or selective management. Computed tomographic (CT) scanning provides high-resolution images that are used for trauma in other body regions. The purpose of this study is to prospectively evaluate the utility of CT scanning in the evaluation of zone II penetrating neck injuries.

METHODS

From July 1998 to November 1999, 14 stable patients were studied who sustained zone II penetrating neck injuries. All patients had a physical examination, infusion CT scan of the neck, and an operative exploration. Before surgery, the trauma surgeon evaluated the CT scan and interpreted it as demonstrating either "high" or "low" probability for significant injury. Surgical findings were compared with the surgeon's preoperative interpretation of the CT scan.

RESULTS

Three of 14 patients had five significant injuries. All these patients had high probability of injury CT scans, with four of the five injuries specifically diagnosed by CT scan. Sensitivity, specificity, positive predictive value, and negative predictive value were 100%, 91%, 75%, and 100% (p < 0.02), respectively.

CONCLUSION

This small prospective study demonstrates that zone II penetrating neck injuries can be accurately evaluated by CT scan. In addition, the CT scan can be used for surgical decision making. This will eliminate the need for mandatory exploration and limit the role of angiography, esophagography, and endoscopy in zone II penetrating neck injuries.

Management of proximal axillary and subclavian artery injuries

BACKGROUND

The aim of this study was to review the management and outcome of proximal axillary and subclavian artery injuries, and to estimate the prehospital mortality rate for subclavian injury through forensic pathology autopsy data.

METHODS

Data were collected prospectively for 260 patients who presented between 1977 and 1996 with trauma to the proximal axillary and subclavian arteries.

RESULTS

The majority of victims (214, 82 per cent) were admitted following stab injury. Some 154 patients (59 per cent) presented within 24 h of sustaining an injury and, of these, 59 (38 per cent) required immediate surgery. An additional 67 patients (26 per cent) attended 2 days or more after injury. Comparison of these data with those from forensic autopsy reports suggests that the prehospital mortality rate for penetrating subclavian trauma was approximately 75 per cent.

CONCLUSION

Approximately 25 per cent of subclavian artery injuries caused minimal initial symptoms but delayed complications prompted attendance for medical attention. The majority of patients who survived subclavian artery injury and attended for medical attention were haemodynamically stable on admission; selective arteriography provided valuable information in these patients. Supraclavicular and infraclavicular incisions avoided clavicular division and reduced the postoperative morbidity associated with distal subclavian artery injuries.

Carotid arteriovenous fistula in the neck as a result of a facial laceration

Facial lacerations due to penetrating trauma can be deceptive at first glance. The importance of proper wound evaluation and management is illustrated in the case of a patient who sustained a laceration to the face and subsequently developed an arterio-venous fistula in Zone III of the neck. In considering diagnostic studies for evaluation of penetrating wounds to the face, special attention should be placed upon the wounding device, direction, force, and underlying neurovascular structures.

Management of war-related neck injuries during the war in Croatia, 1991-1992

From 1 September 1991 to 31 December 1992, a total of 7,043 wounded patients were treated in the War Hospital in Slavonski Brod. Seven hundred and twenty eight patients with head and neck injuries were treated in the Department of Otorhinolaryngology and Cervicofacial Surgery. Of this number, 187 had neck injuries. Ninety-two (49.2%) of them were treated in outpatient facilities and 95 (50.8%) as inpatients. Immediate exploration was done in 84 patients with penetrating neck injuries. Vital structures were involved in 49 patients: major blood vessels (40 cases), larynx (17 cases), pharynx (8 cases), trachea (5 cases), thyroid gland (3 cases) and esophagus (2 cases). Definitive treatment was given to all of these injuries. Primary wound closure was performed upon exploration in 74 patients who were treated within the first 6 h after trauma. Secondary wound closure was performed in 10 patients with neck exploration performed more than 6 h after injury, and in those with extensive defects of tissue requiring the use of larger local flaps or free flaps. The mortality among patients with neck injuries was 2.1%.

Penetrating visceral injuries of the neck: results of a conservative management policy

A study of the conservative treatment of 109 patients with penetrating neck injuries was carried out over 3 years. Patients with clinical or radiological evidence of injury to the oesophagus or trachea were included in the study while nine patients with major vascular trauma were explored immediately and excluded. Three late vascular operations were performed. The remaining 106 patients were treated conservatively. There were two deaths, both from associated injuries. The remaining 104 patients were treated successfully with only three cases of minor wound sepsis. We conclude that oesophageal and tracheal injuries after stab injuries and low velocity gunshot wounds can be treated successfully by non-operative treatment.

A twelve-year survey of cervicothoracic vascular injuries

This study of a large series of victims of trauma to the cervicothoracic great vessels confirms the lethal potential of these injuries: more than half of victims of such injuries died. The optimal management of patients potentially harboring such vascular damage appears to include skilled prehospital resuscitation and rapid transport to a trauma center, a high index of diagnostic suspicion, a low threshold for the performance of contrast arteriography, aggressive surveillance for associated neurologic and aerodigestive tract injuries, and timely technical repair, including liberal indications for sternotomy or thoracotomy to assure vascular control.

Vascular trauma

Civilian vascular trauma is not uncommon. Prompt treatment with modern vascular surgical techniques produces good results.

Subclavian vascular injuries

This study comprises 228 patients with penetrating injuries of the subclavian vessels. The vein alone was involved in 44 per cent, the artery alone in 39 per cent, and both vessels in 17 per cent. The majority of the victims (61 per cent) did not reach the hospital alive, and in those who were operated on the mortality was 15.5 per cent (overall mortality 66 per cent). The overall mortality of venous injuries was significantly higher than the arterial ones (P less than 0.01), probably because of the dangerous complication of air embolism. Physical examination is reliable in the diagnosis of these injuries and there is no need for an emergency angiogram. The clavicular incision was the preferred approach. Repair was performed in 94 per cent of those with arterial injury. Vein injuries were treated by suture in 60 per cent and ligation in 40 per cent. A selective conservative approach is advised.

Panendoscopy with arteriography versus mandatory exploration of penetrating wounds of the neck

Of 193 patients with penetrating wounds of the neck, 76 had only surgical exploration; 57 had only nonsurgical exploration including one or more of the following: arteriography, bronchoscopy, laryngoscopy, esophagoscopy, and contrast-swallow esophagogram; and 60 had both surgical and nonsurgical exploration. Eighty-six patients were wounded by gunshot, 108 by stabbing. Presenting signs and symptoms were an unreliable method of predicting presence or absence of injury. Overall negative rate of surgical exploration was 50% (54% of the stabbings and 45% of the gunshots). Accuracy of nonsurgical exploration was assessed by comparing to surgery. Arteriography was 100% accurate, a combination of bronchoscopy and laryngoscopy was 100% accurate, contrast-swallow esophagogram was 90% accurate, and esophagoscopy was 86% accurate. The literature was reviewed regarding the accuracy of nonsurgical as well as surgical exploration. The one complication attributed to nonsurgical exploration was a symptomatic anemia, while there were two wound infections resulting in increased length of stay associated with negative surgical exploration. Overall mortality rate was 5.6%. The average length of stay for nonsurgical exploration only was 2.8 days, for negative surgical exploration was 4.2 days, and for positive surgical exploration was 9.5 days. Financial cost of a negative surgical exploration was $3185, while for four-vessel cerebral arteriography with panendoscopy it was $3492. More studies need to be done, particularly concerning venography and esophagoscopy. However, considering the fact that surgical exploration should by no means be considered 100% accurate, the data in this study support the fact that arteriography with panendoscopy represents an equally safe and acceptable method of exploration of penetrating wounds of the neck for stable patients without specific signs and symptoms of injury and can be expected to result in a reduced number of negative surgical explorations and their associated morbidity as well as a reduced length of hospital stay, although at a slightly higher financial cost when compared to mandatory surgical exploration.

Penetrating neck trauma: consensus and controversies

Proper emergency evaluation and treatment of the victim of penetrating neck trauma requires a thorough knowledge of cervical anatomy and of the injuries that are likely to occur. Nonoperative studies supplement the physical examination in the evaluation of these patients, and may either assist in the operative approach or allow for safe observation of the patient. The debate concerning exploration and observation of penetrating neck wounds continues.

Civilian maxillo-facial gunshot injuries

Recently, in many parts of the world, there has been an increase in the number of civilian crimes involving guns and nowadays any oral surgeon in hospital may be confronted with this type of injury. This paper reviews the mechanism of wounding by different firearms to allow an appreciation of their effect on living tissues, and then outlines the clinical management of these injuries.

Penetrating neck trauma with tracheal and oesophageal injuries

Failure to recognize early that penetrating neck wounds include the cervical oesophagus greatly increases morbidity and mortality. From an analysis of experience over 5 years (1978-1983) it emerges that, while tracheal wounds are usually recognized early, cervical oesophageal injuries are not. It is empyema which complicates such oesophageal injury and which prompts referral to a Department of Thoracic Surgery, the patients by this time being mortally ill, with septicaemia and malnutrition. Neck penetration is usually left-sided, the injuring agent usually a knife, driven downwards and medially by a right-handed assailant. Empyema is usually right-sided. Early recognition and prompt referral are associated with a low morbidity and low mortality. Late recognition and late referral carry a high morbidity rate, prolonged convalescence in those who survive, and a mortality rate of nearly 25 per cent.

Penetrating neck wounds

Over a 15 year period 120 patients with neck injuries that penetrated the platysma were studied. Appropriate treatment was initiated in the emergency room. Sixty-one patients underwent exploration and 59 were observed. Two of the observed patients later required delayed operation. In 9.2 percent of the patients, two or more injuries were present within the neck, whereas in 30 percent the neck injury was only one of many bodily injuries. Length of hospital stay for the operative group of patients was 9 days and for the nonoperative group 5 days. There was one death. The complication rates in the operative and nonoperative groups were 2.5 and 1.7 percent, respectively. The major structures injured were within the venous system. The neck injuries were classified according to three zones defined by Saletta and Jones and their co-workers [4,5]. The majority were Zone II injuries. Our morbidity and mortality rates are slightly lower than those reported in most series. This review supports the concept that therapy for penetrating injuries to the neck should be individualized.

Management of acute civilian vascular injuries

Vascular trauma continues to be an exciting and formidable challenge to surgeons. Increasing numbers of survivors of major vascular trauma such as suprarenal aortic and caval injuries are being reported in the literature. Successful repair of venous injuries rather than ligation is being achieved in significant numbers of cases. Combined team approaches utilizing new techniques of microvascular surgery and orthopedic fixation have dramatically improved the results of revascularization in extremity injuries and subsequent restoration of limb function.

Penetrating injuries of the neck: a prospective study of 108 patients

One hundred and eight patients were admitted to King Edward VIII Hospital, Durban, with a penetrating wound of the neck and were managed by a conservative policy. Intervention was undertaken if, and only if, there was an indication of damage to deep structures. Data were collected prospectively. Significant sequelae were seen in only 50 patients (46 per cent) and 26 underwent surgery. Three patients died from their neck injuries (2.8 per cent). 2 after operative intervention and 1 after conservative management. Morbidity was higher after surgery, though local sepsis in wound haematomas was more common in those treated conservatively. A selective policy for surgical intervention is safe and justifiable. A minimum mortality and morbidity can be obtained by adequate preoperative evaluation which includes the use of contrast radiography and angiography.

Evaluation and management of penetrating wounds of the neck: the role of emergency angiography

With the use of emergency angiography, careful observation, and monitoring, 40 consecutive patients with penetrating wounds were selectively managed. Eleven patients were operated on with one negative exploration and one death. Twenty-nine patients were observed after negative angiography without operation on the neck and were subsequently discharged without' overlooking a significant vascular or visceral injury or amy complication. We believe this policy to be safe and effective. It should reduce the number, the morbidity, and the cost of needless mandatory surgical explorations and should guard against clinically undetected serious injuries. Operations should be reserved for those patients with clinically obvious servere vascular or visceral injury and for those with radiographically demonstrated significant lesions.