Serum creatinine kinase levels for diagnosing muscle damage in electrical burns

[Serum creatine phosphokinase as a predictor of upper limb amputation in electrical trauma]

OBJECTIVE

To study the relationship between serum creatine phosphokinase and outcomes of injury in victims with electrical burns.

MATERIAL AND METHODS

Among 40 patients with electrical injury, 7 (18%) ones underwent upper limb amputation. There were 37 (92.5%) men and 3 (7.5%) women aged 37 (28; 47) years. We analyzed total serum creatine phosphokinase and MB fraction on the first day in patients with and without amputations.

RESULTS

Total serum creatine phosphokinase exceeded the upper reference value in 11 out of 33 patients without amputation and in all 7 patients with limb amputation (p=0.001). Patients with limb amputation had significantly higher total serum creatine phosphokinase and MB fraction (p<0.001 and p=0.030, respectively). Logistic regression equation showed that high total serum creatine phosphokinase significantly influenced amputation rate (p<0.001), as evidenced by odds ratio (42.7, 95% CI 3.5-514.8). ROC analysis revealed the cut-off value of total serum creatine phosphokinase (950 IU/L). Sensitivity was 100% (63; 100), specificity - 94% (86; 94), positive predictive value - 78% (49; 78), negative predictive value - 100% (92; 100).

CONCLUSION

Total serum creatine phosphokinase depends only on severity of electrical and flame burns. Serum creatine phosphokinase is a predictor of upper limb amputation in patients with electrical injury. Total serum creatine phosphokinase ≥ 950 IU/L is significant for upper limb amputation (in CK-MB fraction within the reference values).

Patterns and outcomes of high-voltage versus low-voltage pediatric electrical injuries: an 8-year retrospective analysis of a tertiary-level burn center

INTRODUCTION

Although electrical injuries (EIs) are rare traumas in the pediatric age group, they are considered one of the most devastating injuries. We aimed to evaluate the patterns and outcomes of pediatric high-voltage (HVI) vs. low-voltage injuries (LVIs), admitted to the burn center within the efforts of determining evidence-based data for contributing to burn prevention strategies.

METHODS

A retrospective study was conducted on children with EIs hospitalized in the Burn Center of Adana City Training and Research Hospital (ACTRH) for eight years (2013-2020). Data including the patients' clinical and demographic characteristics, the percentage of total body surface area with burns (TBSA%), length of hospital stay (LOS), exposure place, electrical current type, and treatment results were collected and analyzed.

RESULTS

EIs were detected in 57 (2.5%) of 2243 acute pediatric burn injury admissions. EIs were most frequently observed in the form of HVIs, among children within the age range of 13-18 years, mostly in residential outdoor environments, where the high-power lines still passing close to the home roofs and balconies, resulting from contact with them. Besides, with a lesser extent in LVIs, in the home environment among children under five years, which was caused by connection with substandard electrical cords/poor-quality electrical devices and inserting an object into the electric sockets. Concerning the mean of TBSA%, HVIs suffered more extensive burns than LVIs. The most frequently affected anatomical regions among HV and LVIs were the upper limb, followed by the lower limb. While superficial partial- and deep partial-thickness burns were significantly more common among the LVIs, full thickness burns were more prevalent among the HVIs. The amputation rate was 12% which only one of them was major amputation (forearm above the elbow joint). HVIs had more elevated CK and CK-MB levels than LVIs but were not correlated with ECG findings. Only one death (caused by HVI) was observed, with a mortality rate of 1.8%.

CONCLUSION

Pediatric EIs are less common than scald or fire-flame related burns in this age group but can cause significant morbidity and even mortality, especially in severe burns. It is possible to prevent possible morbidity and mortality by strengthening compliance with safety precautions, especially with parental education and raising social awareness. In this context, taking necessary precautions for passing high voltage power lines under the ground, the standardization of electrical cables by the relevant legal regulations, the use of socket covers in homes, promoting the widespread use of residual current relays and arrangements to be taken against the use of illegal electricity are among measures for the prevention strategy.

MR imaging findings of high-voltage electrical burns in the upper extremities: correlation with angiographic findings

BACKGROUND

A high-voltage electrical burn is often associated with deep muscle injuries. Hidden, undetected deep muscle injuries have a tendency for progressive tissue necrosis, and this can lead to major amputations or sepsis. MRI has excellent soft tissue contrast and it may aid in differentiating the areas of viable deep muscle from the areas of non-viable deep muscle.

PURPOSE

To describe the MR imaging findings of a high-voltage electrical burn in the upper extremity with emphasis on the usefulness of the gadolinium-enhanced MRI and to compare the MR imaging findings with angiography.

MATERIAL AND METHODS

We retrospectively reviewed the imaging studies of six patients with high-voltage electrical burns who underwent both MRI and angiography at the burn center of our hospital from January 2005 to December 2009. The imaging features were evaluated for the involved locations, the MR signal intensity of the affected muscles, the MR enhancement pattern, the involved arteries and the angiographic findings (classified as normal, sluggish flow, stenosis or occlusion) of the angiography of the upper extremity. We assessed the relationship between the MR imaging findings and the angiographic findings.

RESULTS

The signal intensities of affected muscles were isointense or of slightly high signal intensity as compared with the adjacent unaffected skeletal muscle on the T1-weighted MR images. Affected muscles showed heterogenous high signal intensity relative to the adjacent unaffected skeletal muscle on the T2-weighted images. The gadolinium-enhanced T1-weighted images showed diffuse inhomogeneous enhancement or peripheral rim enhancement of the affected muscles. The angiographic findings of the arterial injuries showed complete occlusion in three patients, severe stenosis in two patients and sluggish flow in one patient. Of these, the five patients with complete occlusion or severe stenosis on angiography showed non-perfused and non-viable areas of edematous muscle on MRI. On the other hand, one patient with sluggish flow on angiography showed a perfused and viable area of edematous muscle on MRI.

CONCLUSION

Gadolinium-enhanced MRI is a useful non-invasive imaging modality to detect the site and extent of hidden, undetected deep muscle injuries in a group of patients with high-voltage electrical burns of the upper extremities.

Analysis of factors influencing limb amputation in high-voltage electrically injured patients

BACKGROUND

Limb amputation is considered one of the most devastating consequences of electrical injury. Any factors that correlate with the degree of muscle damage can be used to predict the necessity of limb amputation. The aim of this study was to determine the factors that can be used to predict limb amputation in high-voltage electrically injured patients.

METHODS

Eighty-two high-voltage electrically injured patients were admitted to our hospital during a 17-year period. A retrospective analysis of the possible related risk factors between amputation and non-amputation patients was performed.

RESULTS

A total of 68 patients were enrolled for analysis. Thirteen patients underwent limb amputations. Multivariate analysis of the risk factors between amputation and non-amputation groups showed statistical significance for day 1 creatine kinase-isoenzyme MB (CK-MB) level. A serum CK-MB level above 80 ng/ml predicted high risk of limb amputation with high specificity (84%) and sensitivity (77%). Only one patient with a remarkable decrease of creatine kinase (CK) and CK-MB levels after fasciotomy avoided a major limb amputation.

CONCLUSION

Our results suggest that CK-MB level is an independent factor for prediction of limb amputation. We suggest that the addition of CK-MB evaluation to clinical symptoms screening may be a valuable method to early detection of muscle damage.