Neurological sequelae following a high voltage electrical burn

Electrical injuries and outcomes: A retrospective review

Electrical burns (EI) differ from other burn injuries in the immediate treatment given and delayed sequelae they manifest. This paper reviews our burn center's experience with electrical injuries. All patients with electrical injuries admitted from January 2002 to August 2019 were included. Demographics; admission, injury, and treatment data; complications, including infection, graft loss, and neurologic injury; pertinent imaging, neurology consultation, neuropsychiatric testing; and mortality were collected. Subjects were divided into those who were exposed to high (>1000 volts), low (<1000 volts), and unknown voltage. The groups were compared. P < 0.05 was considered significant. One hundred sixty-two patients with electrical injuries were included. Fifty-five suffered low voltage, 55 high voltage, and 52 unknown voltage injuries. High voltage injuries were more likely to be male (98.2% vs. 83.6% low voltage vs. 94.2% unknown voltage, p = 0.015), to experience loss of consciousness (69.1% vs. 23.6% vs. 33.3%, p < 0.001), cardiac arrest (20% vs. 3.6% vs. 13.4%, p = 0.032), and undergo amputation (23.6% vs. 5.5% vs. 8.2%, p = 0.024). No significant differences were observed in long-term neurological deficits. Twenty-seven patients (16.7%) were found to have neurological deficits on or after admission; 48.2% recovered, 33.3% persisted, 7.4% died, and 11.1% did not follow-up with our burn center. Electrical injuries are associated with protean sequelae. Immediate complications include cardiac, renal, and deep burns. Neurologic complications, while uncommon, can occur immediately or are delayed.

We Got Your Back: Evaluating Recovery Following Spinal Cord Injury After High-Voltage Electric Burns

Delayed spinal cord injury (SCI) is a relatively rare consequence of high voltage electrical burns, but it holds significant implications for patient quality of life. Due to the uncommon nature of delayed SCI and variable time of onset following injury, providers are currently unable to provide a prognosis for functional recovery and optimize a therapy process tailored to treat this patient populace. In this study, we aim to better map the pattern of recovery in these patients to better inform future rehabilitation practices. A retrospective chart review of five patients who experienced delayed SCI secondary to an electrical burn was conducted. The majority of patients displayed an upward trajectory in motor function following acute hospitalization and inpatient rehabilitation, with four of the five patients able to achieve complete motor strength in multiple extremities. In addition, rehabilitation was shown to have a noticeable impact in improving functional independence in tasks related to nursing. In conclusion, the clinical and functional outcomes of these delayed SCI patients point to the need for multidisciplinary management following injury and highlight the importance of early rehabilitation in regaining function.

Acute-Onset Quadriplegia With Recovery After High-Voltage Electrical Injury

Although uncommon, electrical injuries are associated with significant morbidity and mortality. There have been several reports of neurological sequelae secondary to electrical injury; however, the neurophysiology is still not completely understood. These neurological complications pose the greatest risk for permanent disability. We present a case of acute-onset quadriplegia after high-voltage electrical injury without radiographic evidence. Two months after the injury, the patient went on to regain partial sensorimotor function. Only a few case reports in the literature exist describing neurological recovery after electrical burn-induced quadriplegia. These cases are reviewed.

Medial Lemniscus Tract Lesion After High Voltage Electrical Injury: A Case Report

We present the case of a 33-year-old man who experienced a 10,000-V electrical shock when working with electrical wiring. He suffered third-degree burns on his scalp at the right occiput (entry wound) and on his left arm (exit would), and a second-degree burn on his left foot (exit wound). He presented with severe spasticity of both lower extremities, motor weakness with a Medical Research Council grade of 3, and sensory impairments below thoracic level 11 that included an inability to sense light touch and defects in proprioception. Initial magnetic resonance imaging (MRI) scans of his spine and brain showed no definite abnormalities. However, tractography obtained by diffusion tensor imaging of the brain showed absence of the right medial lemniscus tract. A cervical MRI scan 1 month later showed spinal cord swelling from cervical 1-5 levels, and signal changes in the lateral and posterior white matter in the axial view. After 6 months of rehabilitation, he recovered almost normal degree of motor function in his lower extremities and disappearance of spasticity. However, since the sensory impairments persisted, especially defects in proprioception, he was unable to walk independently.

High-voltage electrocution causing bulbar dysfunction

Electrical shock can result in neurological complications, involving both peripheral and central nervous systems, which may present immediately or later on. High-voltage electrical injuries are uncommonly reported and may predispose to both immediate and delayed neurologic complications. We report the case of a 68-year-old man who experienced a high-voltage electrocution injury, subsequently developed bulbar dysfunction and spontaneously recovered. We describe the development of bulbar palsy following a significant electrical injury, which showed no evidence of this on magnetic resonance imaging. High-voltage electrocution injuries are a serious problem with potential for both immediate and delayed neurologic sequelae. The existing literature has no reports on bulbar dysfunction following electrocution, apart from motor neuron disease.

Electrical burn causing a unique pattern of neurological injury

Neurological involvement is not uncommon in patients who sustain electrical injury. The exact mechanism of nervous system damage following electrical trauma is not fully understood. The gamut of possible neurologic manifestations following electrical injury is diverse. This case report describes a young man with a unique pattern of neurological injury following an electrical burn. The combination of brachial plexopathy, partial Horner's syndrome, and phrenic nerve palsy secondary to electrical injury has not been previously described in the literature.

Guillain-Barre syndrome-like illness in association with electrical shock injury

A 19-year-old man presented 4 weeks after an electrical shock injury with gradual onset limb weakness, altered sensation in the peripheries and respiratory difficulty. There was immediate tingling of the fingers following the electrical injury that persisted. He subsequently had transient facial weakness responsive to oral steroids before the development of further limb symptoms. On admission the clinical picture and investigation findings, including neurophysiology, cerebrospinal fluid examination and MRI were consistent with a Guillain-Barre syndrome. He was managed with a course of intravenous immunoglobulin and extensive physiotherapy and occupational therapy. He made an initial modest improvement but worsened again over the subsequent 4-6 weeks. Further investigation identified no ongoing active disease and he is left with a significant residual deficit.

Analysis of high-voltage electrical spinal cord injury using diffusion tensor imaging

The aim of this study was to investigate spinal cord injury (SCI) on the basis of diffusion tensor imaging (DTI) in patients with high-voltage electrical injury. We recruited eight high-voltage electrical injury patients and eight healthy subjects matched for age and sex. DTI and central motor conduction time were acquired in both the patient and control groups. We obtained DTI indices according to the spinal cord levels (from C2 to C7) and cross-section locations (anterior, lateral, and posterior). Fractional anisotrophy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were compared between the two groups; additionally, they were compared in relation to spinal cord level and cross-section location. In the patient group relative to the control group, the FA value decreased and the MD and RD values increased in all of the regions of interest (ROI) with statistical significance (p < 0.05). In the patient group, particularly in the ROIs of the anterior spinal cord compared with the lateral and posterior spinal cords, the FA value decreased with statistical significance (p < 0.05). The DTI indices did not differ by level. DTI revealed the change of diffusion in the spinal cords of patients with high-voltage electrical injury, and corroborated the pathophysiology, myelinopathy and typical anterior spinal cord location of high-voltage electrical SCI already reported in the literature.

Corticospinal tract dysfunction and development of amyotrophic lateral sclerosis following electrical injury

The causal relationship between electrical injury and development of amyotrophic lateral sclerosis (ALS) remains controversial. We describe the case of a 25-year-old man who developed ALS after a severe electrical injury. Cerebral magnetic resonance imaging (MRI) demonstrated hyperintensities involving the corticospinal tract. Functional testing with transcranial magnetic stimulation established that the motor cortex was relatively inexcitable. In addition, there were features of denervation on electromyography and muscle biopsy that supported concomitant lower motor neuron findings and the diagnosis of ALS.

Delayed cervical spinal cord injury after high voltage electrical injury: a case report

High voltage electrical injuries usually cause devastating consequences for patients, most of which result in permanent disability. Spinal cord injury (SCI) caused by high voltage electrical injury is uncommon in the literature. We present a 29-year-old male patient who was diagnosed as having delayed SCI after high voltage electrical injury. The patient developed muscle weakness in the lower extremities with the loss of pinprick sensation below the fifth cervical spinal segment, 2 days after the high voltage electrical injury. Magnetic resonance imaging of the brain, cervical and thoracic spine was normal. Nerve conduction and needle electromyography studies were normal, except for bilateral tibial and left median somatosensory-evoked potentials. The findings on initial examination and neurophysical investigation showed incomplete cervical SCI at the C5 level. He was able to walk with a pair of canes and bilateral ankle-foot orthosis at the end of the 2-month rehabilitation. Follow-up physical and electrophysiological examination of the patient 15 months after injury showed further improvement. The patient was able to walk with a pair of canes without orthoses. Electrophysiological studies are useful instruments in the diagnosis and follow-up of these patients. Early rehabilitation is essential to obtain a favorable outcome in patients with SCI caused by high voltage electrical injury.

Neurological manifestations of electrical trauma

Some degree of neurological impairment is often found in patients following electrical injury. A wide range of neurological impairments can occur including peripheral neuropathies, chronic pain syndromes, brain injury and rarely severe paralytic syndromes. Outcome is difficult to accurately predict. The symptoms can present immediately or be delayed in onset. They can also be temporary, permanent or get progressively worse with time. The neurological impairment resulting from the current often comprises a substantial proportion of the morbidity associated with such injuries. It is known that electrical current can cause nerve injury, however, the primary etiology of such damage is yet to be elucidated. An unusual case of transient paralysis after high voltage burn associated with severe hypokalemia provides unique insight into a potential mechanism for nerve injury following electrical trauma.

Severe hypokalemia as a cause of acute transient paraplegia following electrical shock

Transient lower extremity paralysis has been previously reported following high voltage electrical injury. The following case report describes an unusual presentation of transient acute flaccid lower extremity paralysis following a high voltage electrical injury associated with profound hypokalemia and acid/base abnormalities similar to the periodic paralysis syndrome. The patient's symptoms resolved with correction of severe hypokalemia. Potential mechanisms for a metabolic neuromuscular disorder induced by electrical injury are proposed.

Electrical injuries in Canadian burn care. Identification of unsolved problems

Over the past decade, the Firefighters' Burn Treatment Unit of the University of Alberta Hospital in Edmonton, Alberta, Canada, has treated 1399 inpatients suffering from thermal injury. Regional burn care is provided in a 10-bed intensive care unit with 18 plastic surgery reconstructive beds for a large referral region of central and northern Alberta, portions of the Northwest Territories, and neighboring provinces of British Columbia and Saskatchewan. Of the total burn inpatients during this period, 74 electrical injuries were treated (5.3% of all admissions): 71 were males (95.9%) and 3 females (4.1%). The mean age of all patients was 33.9 +/- 12.6 years (range 1-67). Compared to our general population of thermally injured patients, those with electrical injuries had smaller injuries [9.9 +/- 12.9% TBSA (range 1-65) versus 15.1 +/- 10.1], shorter length of hospitalization [18.6 +/- 7.3 days (range 1-80) versus 26.2 +/- 0.8], and substantially lower mortality once reaching the hospital (0% versus 4%). Electrical injuries were classified as flash in 30 cases, contact in 42 cases, and lightning in 2 cases; 74.3% of injuries occurred during work-related activities. A total of 118 operative procedures were performed during the acute admission (1.6 procedures per patient), including 19 amputations: 12 in the upper and 7 in the lower extremity. The mean time of amputation was 9.3 +/- 5.3 days after admission. In contact injuries of the upper extremity, 14 patients suffered amputations or neurologic injury that required reconstruction with free tissue transfers and nerve grafts. Long-term functional outcome of these patients using sensory testing, the Jebsen-Taylor hand function test, and wound coverage has revealed that these patients have substantial persistent sensory impairment of their upper extremities postinjury despite reconstruction, although many remain active and functional with acceptable wound coverage. Based on our analysis of electrical injury as it presents to one typical Canadian burn unit, our patients suffer limb loss on a delayed basis, which leads to substantial morbidity. Reconstruction of the upper extremity with microsurgical techniques after profound electrical injury has provided acceptable coverage, but in many instances is associated with poor or marginal sensory recovery limiting reemployment options for patients with upper extremity electrical burns. Further understanding of the cellular biology of delayed tissue loss after electric injury would offer the potential for reduction in amputation rate and improvement in functional outcome and overall morbidity.

Spinal cord injury after electrical trauma treated in a burn unit

OBJECTIVE

To analyse the incidence, diagnosis and outcome of spinal cord injury in patients with electrical injuries.

PATIENTS AND METHODS

Retrospective analysis of patients with electrical injuries admitted to our Intensive Care Burn Unit over a 5 year period. Among 435 admissions, 57 (13.1% of all admissions) were electrical injuries, due to either electrical flash (n = 34) or high voltage (n = 23). Two cases (8.6% of high voltage injuries) presented signs of spinal cord injury. Both cases presented an acute transverse myelopathy, involving the pyramidal tract, the posterior cords and the spinothalamic tract, causing a pyramidal syndrome with abnormal sensation and involvement of posterior cords, one with paraplegia and the other one with quadriplegia. Diagnoses were made 1 and 2 weeks after admission, respectively, when sedation was discontinued and neurological signs could be appreciated. Computerised axial tomography and nuclear magnetic resonance were normal in both cases at the moment of diagnosis. Both patients experienced a slow but progressive improvement of their neurological condition, and remain presently in a rehabilitation program 15 and 18 months after trauma.

DISCUSSION

Our cases illustrate (i) that damage to the spine is not infrequent after electrical injury, (ii) the difficulty in making the diagnosis of spinal cord injury after electrical trauma, and (iii) the importance of early diagnosis to define neurological prognosis and start available therapies as soon as possible.

Electric burns: high- and low-tension injuries

From January 1993 to December 1997, 179 patients with electrical injuries were admitted to our burn unit. There were 55 patients with high-tension injuries and 124 patients with low-tension injuries. A high incidence of amputation (42%) is one of the characteristic sequelae of high-tension injuries, but no patients in this group of burns died. Early and serial debridement of necrotic tissue is our treatment of preference. The patient needs extensive rehabilitation and psychiatric support.