An analysis of 550 hospitalized pediatric burn patients in Hong Kong

A total of 550 acute burn patients under the age of 15 years were admitted to the Burns Unit of Prince of Wales Hospital, Hong Kong between March 1993 and February 1999. There were 337 males and 213 females with a male to female ratio of 1.58:1. The median age was 2.5 years and the median burn size was 5% total body surface area (TBSA). Toddlers of age < 2 years accounted for 235 (42.7%) of admission. Domestic burns resulted in 481 (87.5%) injuries followed by play-related burns that caused 34 (6.2%) admissions. Scalding was the most common cause of injury, which accounted for 497 (90.4%) admissions, followed by flame burns, which resulted in 45 (8.2%) injuries. Nine patients (1.6%) had inhalation injury requiring intubation and ventilatory support. The median hospital stay was 8 days and there was no seasonal variation in admission. The majority of patients (80.2%) had their wounds healed without any operation. Only 19 out of 550 patients (3.5%) had burns of 30% TBSA or larger, and only nine patients (1.9%) had inhalation injuries. Only one patient died in this series, which yielded a mortality rate of 0.2%.     

Social support correlates with survival in patients with massive burn injury

Large burn size, inhalation injury, age, and associated trauma increase the rate of mortality after burns. However, not all patients with large burns and significant risk factors die. In this study, we wanted to determine other presenting factors that might indicate a survival benefit for burn patients with large burns. We reviewed charts of 36 patients with burns > or =60% TBSA that were aggressively resuscitated at the University of Washington Burn Center from 1990 to 2000 to determine whether survivors of large burns exhibit presenting variables that predict survival. Patients who had comfort care measures initiated at admission were excluded from this analysis. Survivors (n = 16) and nonsurvivors (n = 20) had no significant differences in age, total burn size, inhalation injury, or need for escharotomy. Full-thickness burn size was significantly smaller for survivors (58%) than for nonsurvivors (73%; P = .02). Survivors (81%) were more likely than nonsurvivors to have social support (35%; P = .007). A full-thickness burn > or =80 % TBSA was the only variable uniformly associated with mortality, suggesting that patients who survive large burns have a partial-thickness component that heals without surgery. The difference in degree of social support was one unique distinction that may impact patient survival and is worth further investigation.     

Burn size estimation in children: Still a problem

Background: Accurate determination of burn size and depth forms an integral part of the initial assessment of any burn injury. Errors might lead to inaccurate fluid resuscitation and inappropriate transfer of patients to specialized burns units (BUs). Although recent data suggest some improvement in the estimation of burn injury in adults, this has not been shown in children. Methods: A retrospective review of children with burn injuries referred to the BU of our institution was performed. Data were collected from all patients presenting to the BU during the calendar year 2009. The total body surface area burned (TBSA‐B) estimated by the referring centre was compared with the actual TBSA determined measured on arrival at the BU. Results: Of the 71 paediatric patients referred during the study period, 10 did not have any TBSA‐B estimation documented by the referring hospital. Inaccurate estimation of burn area was noted in 48 out of 61 patients (79%). Burn size was more likely to be overestimated than underestimated by a ratio of 2.2 to 1, especially in burns >10% TBSA‐B (P= 0.002). Conclusions: Inaccurate estimation of burn size remains a problem in children. The persistent miscalculation of burn size might be a result of the various methods employed in assessing burn area, the inclusion of simple erythema and inadequate training or exposure of first responders. Accurate assessment of TBSA‐B and burn depth in children remains elusive and would appear to require additional training and education.     

Burns caused by automobile radiators: a continuing problem.

In spite of the fact that injury warning labels have been placed on radiator caps for the last 15 years, automobile radiator scald burns continue to be a burn prevention problem. The temperature of radiator fluid may be as high as 100 degrees F to 250 degrees F in a properly functioning car and higher in an overheated vehicle. From 1974 to 1990, 100 patients with burns that were caused by automobile radiators have been admitted to the Parkland Memorial Hospital Burn Unit (1.5% of acute admissions). Eighty-two percent of the injuries occurred in the summer months, and 93% of the patients were male. Mean age was 31 +/- 17 years (range, 8 months to 79 years), and mean burn size was 11.3% total body surface area (TBSA) (range, 1% to 32%) with a mean full-thickness burn size of 0.6% TBSA. Length of stay was 7 +/- 7.4 days (range, 1 to 38 days). Burns to the face, neck, and trunk necessitated most admissions. Although there were no deaths, five patients required intensive care for airway monitoring; mean length of stay was 6 days. One patient required endotracheal intubation for a total of 11 days. Ten patients required one or more skin grafting procedures, and three patients required burn resuscitation. Four patients sustained minor ocular injuries. A subgroup of patients demands special review: 10 children younger than 10 years of age (mean age, 4.1 years) of which 70% were boys. Mean burn size was 15.5% TBSA; mean full-thickness burn size was 2.4% (four times larger than the mean burn size for the adult population).(ABSTRACT TRUNCATED AT 250 WORDS)     

Emergent burn care

The estimated 32,600,000 fires that occur annually in the United States produce over 300,000 injuries and 7,500 deaths. Ten percent of hospitalized burn victims die as a direct result of the burn. Initial evaluation and management of the burn patient are critical. The history should include the burn source, time of injury, burn environment, and combustible products. The burn size is best estimated by the Lund and Browder chart, and the burn depth is determined by clinical criteria. Pulmonary involvement and circumferential thoracic or extremity burns require detection and aggressive treatment to maintain organ viability. Hospitalization is usually necessary for adults with burns larger than 10% of the total body surface area (TBSA) or children with burns larger than 5% of TBSA. Major burns, those of 25% or more of TBSA or of 10% or more of full thickness, should be considered for treatment at a burn center, as well as children or elderly victims with burns of greater than 10% TBSA. Lactated Ringer's solution, infused at 4 ml/kg/% TBSA, is generally advocated for initial fluid restoration. After the acute phase (48 hours), replacement of evaporative and hypermetabolic fluid loss is necessary. These losses may constitute 3 to 5 liters per day for a 40% to 70% TBSA burn. Blood transfusion is often required because of persistent loss of red blood cells (8% per day for about ten days). Many electrolyte abnormalities may occur in the first two weeks. Pulmonary injury commonly is lethal. Circumoral burns, oropharyngeal burns, and carbonaceous sputum are indicative of inhalation injury, but arterial blood gas determinations, fiberoptic bronchoscopy, and xenon lung scans are useful for confirming the diagnosis. Humidified oxygen, intubation, positive-pressure ventilation, and pulmonary toilet are the mainstays of therapy for inhalation injury. Wound care is initially directed at preservation of vital function by escharotomy, if restrictive eschar impairs ventilatory or circulatory function. Antibacterial agents may be applied to the burn, but invasive sepsis, defined as greater than 10(5) organisms per gram of tissue with invasion of subjacent viable tissue, requires systemic antibiotic therapy. Wound debridement is done by daily hydrotherapy, tangential excision, chemicals, primary excision, and grafting, tailoring the technique to the individual burn.(ABSTRACT TRUNCATED AT 400 WORDS)     

The relationship of body mass index and functional outcomes in patients with acute burns.

Obesity may contribute to the functional decline in elderly adults. It can also increase the risk of mortality in burn patients. However, little data exist regarding the relationship between obesity and functional outcomes in patients with burns. Data were collected regarding admission body mass index (BMI), length of stay, TBSA burn, inhalation injury, age, sex, discharge disposition, and discharge functional independence measure (FIM) scores for 221 patients. We used the classification and regression trees (CART) method to determine the strongest predictors of discharge disposition and FIM scores. Patients older than 59, with 0 to 30.75% TBSA burn, and a BMI of less than 27 were more likely to return home when compared with matched patients with a greater BMI. Regardless of age and BMI, patients with greater than 30.75% TBSA burn were less likely to return home (27.6%) posthospitalization when compared with patients with less than 30.75% TBSA burn (82.8%). Patients aged 54 to 72 years with less than 22.50% TBSA burn and a higher BMI (>25.15) demonstrated lower FIM locomotion scores than corresponding patients with a lower BMI (<25.15). Older patients (>72.5 years) with burns less than 22.50% TBSA and a larger BMI (>31.25) had lower transfer FIM scores when compared with matched patients with a smaller BMI (< or =31.25). Among patients with greater than 22.50 TBSA burn, women demonstrated lower FIM transfer and locomotion scores when compared with men. BMI may contribute to lower functional scores and the likelihood of discharge to an inpatient setting in elderly patients with less severe burns.     

Microalbuminuria in acute burn injury.

Microalbuminuria is a known finding in inflammatory states. We hypothesized that urinary albumin/creatinine ratio (ACR) would correlate with injury severity and resuscitation demands after acute burns. This pilot study evaluated 30 adults admitted within 12 hours of injury with burns > or =10% total body surface area burn injury (TBSA). The urinary ACR was calculated for each patient at 7 to 12 hours, 19 to 24 hours, and 43 to 48 hours following burn injury. Microalbuminuria was defined as a urinary ACR > or =20 mg/g. Study patients (23 males, 7 females) had a mean age of 42.9 + 14.0 years and a median TBSA burn injury of 18.8%. Inhalation injury was present in 10 of the study patients, and all patients with inhalation injury had microalbuminuria at the time of admission. One study patient died. Median time from burn injury to resuscitation was 30 hours, and the median fluid requirement was 4.2 ml/kg/%TBSA. Microalbuminuria was not uniformly present in burn-injured patients during the first 48 hours after injury. ACR values early in the hospital course correlated with higher lactate concentrations early after burn injury. However, ACR correlated with neither injury severity nor resuscitation demands after burn injury during any studied time range. Microalbuminuria does not have apparent clinical utility in burn-injured patients, and other markers of injury severity and resuscitation demands should be sought.     

Epidemiology of 1974 burn patients at a major burn center in beijing: a nine-year study

To date, little epidemiological data are available on burns in China. This study describes the characteristics of burn patients admitted to a major burn center in Beijing to show trends in admission and outcomes in burned patients to share information about the current state of care for burned patients in our burn center. A retrospective study on 1974 burn patients admitted to Jishuitan Hospital in Beijing was conducted during the 9-year period from 2000 to 2008, and data were collected on age, gender, TBSA, etiology, length of hospital stay, mortality, and inhalation injury. The male:female ratio of the burn population was 2.41:1 and did not differ significantly over the study period (P > .05). The mean age of admission was 36 ± 16.3 years, and most patients were 30 to 39 years old (24.0%) or 20 to 29 years old (23.8%). The mean TBSA of burn was 14.7 ± 3.4%, ranging from 1 to 100%, and the mean size/age did not change significantly over the course of the study (P > .05). The incidence in burn injury decreased over the study period (P < .05). The most common cause of burn was flame (67.9%) followed by electrical (16.1%) and scald (9.5%). The mean length of hospital stay was 33.2 ± 3.5 days, extending from 1 to 413 days, and it did not differ significantly over the study period (P > .05). The mortality and inhalation injury rate were 2.8 and 6.9%, respectively. Annual mortality rate did not differ significantly over the study period (P > .05). This retrospective review of the specific epidemiological features of burn patients will provide important information for the development of proper control programs to reduce the incidence of burns and burn-related deaths.     

Effect of graft bed on long-term functional results of extremity skin grafts

The purpose of the current study was to determine whether the long-term functional results of extremity burns grafted on fat were different from those grafted on fascia. Twelve patients (mean burn size, 38% TBSA) who had fascial excision of the majority of one or more extremities were examined a minimum of one year postinjury. Range of motion, motor strength, and sensation of the fascially excised extremities were measured. Twelve comparable patients with extremity burns (mean burn size, 35% TBSA) who had grafts placed on fat were used as positive controls. Patients whose burns were excised to fat had better joint mobility (P = 0.001) and sensory function (P = 0.001) than did patients whose burns were excised to fascia. Both groups had comparable muscle strength. These results indicate that patients with full-thickness burns of the extremities who have grafts placed on fat have significantly better long-term extremity function than do patients who have their skin grafts placed on fascia.     

Firefighter burn injuries: predictable patterns influenced by turnout gear

Approximately 100 firefighters suffer fatal injuries annually and tens of thousands receive nonfatal injuries. Many of these injuries require medical attention and restricted activity but may be preventable. This study was designed to elucidate etiology, circumstances, and patterns of firefighter burn injury so that further prevention strategies can be designed. In particular, modification of protective equipment, or turnout gear, is one potential strategy to prevent burn injury. An Institutional Review Board-approved retrospective review was conducted with records of firefighters treated for burn injury from 2005 to 2009. Data collected included age, gender, TBSA, burn depth, anatomic location, total hospital days per patient, etiology, and circumstances of injury. Circumstances of injury were stratified into the following categories: removal/dislodging of equipment, failure of equipment to protect, training errors, and when excessive external temperatures caused patient sweat to boil under the gear. Over the 4-year period, 20 firefighters were treated for burn injury. Mean age was 38.9 ± 8.9 years and 19 of 20 patients were male. Mean burn size was 1.1 ± 2.7% TBSA. Eighteen patients suffered second-degree burns, while two patients suffered first-degree burns. Mean length of hospitalization was 2.45 days. Scald burns were responsible for injury to 13 firefighters (65%). Flame burns caused injury to four patients (20%). Only three patients received contact burns (15%). The face was the site most commonly burned, representing 29% of injuries. The hand/wrist and ears were the next largest groups, with 23 and 16% of the injuries, respectively. Other areas burned included the neck (10%), arm (6.5%), leg (6.5%), knees (3%), shoulders (3%), and head (3%). Finally, the circumstance of injury was evaluated for each patient. Misuse and noncontiguous areas of protective equipment accounted for 14 of the 20 injuries (70%). These burns were caused when hot steam/liquid entered the gear via gaps in the sleeve or face mask. Three patients (15%) received injury due to removal/dislodging of their safety equipment, two patients (10%) suffered their injuries during training exercises when they were not wearing their safety equipment, and the final patient (5%) received burns due to sweat evaporation. Firefighter burn injuries occur to predictable anatomic sites with common injury patterns. Modification and optimization of gear to eliminate gaps that allow steam/hot liquid entry may decrease burn injury. Improving education regarding the use of protective equipment may also be beneficial.     

Cost-effective use of helicopters for the transportation of patients with burn injuries

We performed a retrospective review to analyze the use of helicopters for the transportation of patients with burn injuries to determine whether a more cost-effective approach could be developed without impairing the quality or delivery of health care. Charts were reviewed for all patients with burn injuries who were transported by helicopter to our hospitals during a 2-year period. Patients with inhalation injuries, with burn injuries received more than 24 hours before admission or more than 200 miles from our burn center, with more than 30% total body surface area (TBSA) burned, or with associated trauma injuries were excluded. Control patients with burn injuries who were transported by ambulance were identified and matched to the patients with burn injuries transported by helicopter for the percentage of TBSA burned, the percentage of third-degree burns, transport mileage, and age. The outcome was evaluated by comparison of length of stay, days on ventilator, and mortality rate. Comparisons were performed with Student t test. The transportation charge was determined for the patients transported by helicopter who we believed were eligible for transport by ambulance. Forty-seven of 85 patients transported by helicopter matched the inclusion criteria and had survived. There was no statistically significant difference between the percentage of TBSA burned, the percentage of third-degree burns, length of stay, days on ventilator, age, or transport mileage. There was, however, a significant difference in the time from the injury to admission to the hospital, as well as in the charge for transportation. Patients who had less than 30% TBSA thermal cutaneous injuries without evidence of inhalation injury, and who are less than 200 miles from a burn center may be safely transported by ambulance. Ambulance transportation may take additional time; however, stricter protocols for helicopter transportation of patients with burn injuries will result in potentially substantial savings without affecting outcomes for patients.     

Increasing percent burn is correlated with increasing inflammation in an adult rodent model

Burn injury has been associated with systemic/compartmental inflammatory responses and myocardial dysfunction. We hypothesized that burn size correlates with the extent of cardiac inflammatory response/contractile dysfunction. Adult male Sprague-Dawley rats were divided to receive anesthesia, a 3-degree burn covering 20%, 30%, 40%, or 60% total body surface area (TBSA) plus fluid resuscitation (lactated Ringer, 4 mL/kg per percent burn); sham burn animals were included as controls. There were seven rats in each group. Rats were euthanized Twenty-four h postburn, and TNF-alpha, IL-1beta, and IL-6 were measured in the plasma and in supernatant from isolated cardiac myocytes by enzyme-linked immunosorbent assay. In addition, left ventricular function (Langendorff) was studied in vitro, and troponin levels were measured by enzyme-linked immunosorbent assay. There were progressive, statistically significant increases in plasma and myocyte inflammatory cytokine levels, as well as plasma troponin with increasing burn size. Similarly, left ventricular pressure (in millimeters of mercury) and +/-dP/dtmax (in millimeters of mercury per second) progressively fell with increasing burn size. However, myocardial contractile depression induced by 60% TBSA burn was similar to that produced by 40% TBSA burn. These data suggest that the degree of inflammatory response, cardiac tissue injury, and myocardial contractile depression were correlated directly with the percent TBSA burn. However, unlike inflammation and cardiac tissue damage, myocardial contractile depression reached a plateau, with maximal myocardial contraction and relaxation defects observed at 40% TBSA burn, which were not further aggravated by a larger (60%) burn.     

Inpatient rehabilitation following burn injury: patient demographics and functional outcomes

OBJECTIVE: To identify demographic characteristics of burn patients referred for inpatient rehabilitation, the benefits of rehabilitation in this population, and factors that influence functional outcome. DESIGN: Retrospective chart review. SETTING: Free-standing rehabilitation hospital. PARTICIPANTS: Patients (N=129) admitted for inpatient rehabilitation after a burn injury. INTERVENTION: Comprehensive inpatient rehabilitation. MAIN OUTCOME MEASURES: Demographic data and the FIM instrument on admission and discharge for all patients. RESULTS: Linear measures of functional status derived by Rasch analysis of the FIM showed significant improvements from admission to discharge for all patients. There was no correlation between total body surface area (TBSA), premorbid psychiatric alcohol or drug abuse history, and change between admission and discharge FIM score. There was a significant correlation between TBSA burn and age and between TBSA and length of stay. CONCLUSIONS: Burn patients referred for inpatient rehabilitation are either older or have large TBSA burns. All patients made significant functional improvements and consequently inpatient rehabilitation can be considered an important component of care after a burn injury.     

Comparing a Single Institution's Experience With Electrical Injuries to the Data Recorded in the National Burn Repository

Electrical injuries usually represent a small proportion of a burn center's admissions. Although burn size may be small, internal tissue damage is sometimes extensive. This study reviews a single institution's experience with electrical injuries and compares it to the multi-institutional data of the National Burn Repository (NBR). The 2009 NBR and the records of a large urban burn center (single institution) were queried for adult electrical injuries over an 8-year period. Data examined included demographics, %TBSA burn, length of stay (LOS), injury circumstance, and disposition. Multiple linear regression models were created to determine factors related to LOS. One hundred ninety-one single-institution patients and 2837 multi-institution patients met the criteria. Both cohorts were mostly white males approximately 30 years of age and injuries where often work-related. Single-institution patients had a mean injury size of 4% TBSA, while multi-institution patients had 7%. The most common exposure source was domestic wiring for single-institution patients and electrical power plants/lines for multi-institution patients. Single-institution data showed that females had a shorter LOS than males (P < .0001). Single-institution data showed that independent risk factors for an increased LOS were infection, amputation, fasciotomy, and being Hispanic. Independent risk factors for multi-institution patients were being Hispanic and large %TBSA burn. There was no difference in mortality, gender, age, LOS, or intensive care unit LOS between the cohorts. In this analysis, there was no statistical difference between outcomes in the single- or multi-institutional groups. However, injuries reported in the NBR were slightly larger. In both cohorts, an increase in LOS was associated with %TBSA, as expected. Interestingly, Hispanic ethnicity correlated with an increased LOS. Future work will be aimed at understanding this correlation to determine whether it is specific to electrical injury or burns in general.     

The Association Between Hypothermia,Prehospital Cooling,and Mortality in Burn Victims

Objectives: Hypothermia is associated with increased morbidity and mortality in trauma victims. The prognostic value of hypothermia on emergency department (ED) presentation in burn victims is not well known. The objective of this study was to determine the incidence of hypothermia in burn victims and its association with mortality and hospital length of stay (LOS). The study also examined the potential causative role of prehospital cooling in hypothermic burn patients. Methods: This was a retrospective review of a county trauma registry. The county was both suburban and rural, with a population of 1.5 million and with one burn center. Burn patients between 1994 and 2007 who met trauma registry criteria were included. Demographic and clinical data including prehospital cooling, burn size and depth, and presence of inhalation injury were collected. Hypothermia was defined as a core body temperature of less than or equal to 35°C. Data analysis consisted of univariate associations between patient characteristics and hypothermia. Results: There were 1,215 burn patients from 1994 to 2007. Mean age (±standard deviation [±SD]) was 29 (±24) years, 67% were male, 248 (26.7%) had full‐thickness burns, and 24 (2.6%) had inhalation injury. Only 17 (1.8%) had a burn larger than 70% total body surface area (TBSA). A total of 929 (76%) patients had an initial ED temperature recorded. Only 15/929 (1.6%) burn patients had hypothermia on arrival, and all were mild (lowest temperature was 32.6°C). There was no association between sex, year, and presence of inhalation injury with hypothermia. Hypothermic patients were older (44 years vs. 29 years, p = 0.01), and median Injury Severity Score (ISS) was higher (25 vs. 4, p = 0.002) than for nonhypothermic patients. Hypothermia was present in 6/17 (35%) patients with a TBSA of 70% or greater and in 8/869 (0.9%) patients with a TBSA of <70% (p < 0.001). Mortality was higher in hypothermic patients (60% vs. 3%, p < 0.001). None of the hypothermic patients received prehospital cooling. Conclusions: Hypothermia on presentation to the ED was noted in 1.6% of all burn victims in this trauma registry. Hypothermia was more common in very large burns and was associated with high mortality. In this series, prehospital cooling did not appear to contribute to hypothermia. ACADEMIC EMERGENCY MEDICINE 2010; 17:456–459 © 2010 by the Society for Academic Emergency Medicine     

严重烧伤患者外周血单核细胞表面人白细胞DR抗原变化的初步研究

目的 :探讨烧伤后外周血单核细胞表面人白细胞 DR抗原受体 (HL A DR)的动态变化规律及意义。方法 :选取临床烧伤患者 30例 ,依据病程长短选取病程中 1～ 5个时间点静脉采血 ,以流式细胞仪测定外周血单核细胞 HL A DR的表达率 ,并根据烧伤程度分组进行分析。结果 :伤后患者外周血单核细胞 HL A DR的表达率明显降低 ,降低程度及持续时间与伤情有关 ,特重烧伤患者与中度烧伤患者〔(4.30± 1.5 0 ) %比(13.86 %± 2 .4 0 ) %〕、中度烧伤患者与轻度烧伤患者〔(13.86± 2 .4 0 ) %比 (5 8.80± 5 .6 0 ) %〕比较差异均显著(P均 <0 .0 1)。结论 :单核细胞 HL A DR的表达率是反映免疫功能的简单实用的指标。重症烧伤后免疫麻痹可持续较长时间 ,必要的免疫加强治疗有重要意义。     

Automobile carburetor- and radiator-related burns.

Seventy-nine persons who had sustained automobile engine carburetor- and radiator-related burns were admitted to Grady Memorial Hospital Burn Unit between June 1, 1984 and September 30, 1990. Forty patients with carburetor-priming flame burns had a mean age of 31.5 years, a mean burn size of 13.4% total body surface area, and a mean length of stay of 13.8 days. There were 37 male patients. Four patients had an inhalation injury. Twenty-two surgical procedures were performed on 13 patients. One patient was an innocent bystander, and one patient died. The clothing of 16 patients had ignited, which resulted in larger, deeper burns and in one death. Burns predominantly involved the right sides of the face, head, and torso; the right upper extremity; and the right hand. Thirty-nine patients had scald burns that were associated with uncapping a radiator. These patients had a mean age of 29.6 years, a mean burn size of 8.9% total body surface area, and a mean length of stay of 6.4 days. There were 36 male patients and three innocent bystanders. One autografting procedure was performed, and there were no deaths in this group of patients. The burn-prone person is the young adult male. The circumstances that result in such dangerous behavior are predictable, and resultant burn injuries are preventable.     

高密度脂蛋白对严重烧伤大鼠肝组织保护的组织学观察

目的：探讨高密度脂蛋白（HDL）对严重烧伤大鼠肝脏的保护作用。方法：制作大鼠30％体表Ⅲ度烫伤模型，观察正常对照组（不作任何处理），烧伤组（烫伤后30min补充平衡溶液）及实验组（烫伤后立即静脉注入HDL）。伤后12、24、48、72h4个时间点的肝组织学变化和细胞间粘附分子1（ICAml）的表达。结果：（1）组织学观察：烫伤后各组大鼠肝细胞均有不同程度损伤，其中以烧伤组伤后24h最重，肝窦扩张充血，窦内炎细胞浸润，肝细胞变性，点灶性坏死，实验组24h肝组织学改变与烧伤组比较上述损伤明显改善。正常对照组肝组织结构基本正常。（2）ICAm-1免疫组化检测：正常对照组无表达，烧伤组与实验组ICAm-1平均表达率分别为81．6％（49／60）及36．6％（22／60），两组24h时段的表达率分别为86．6％（13／15）及20％（3／15），烧伤组表达强度明显高于实验组（P〈O．01），而两组各其他时段表达强度差异无显著性（P〉0．05）。结论：严重烧伤大鼠早期应用HDL对抑制肝细胞中ICAm-1的表达，减少肝细胞免疫损伤有良好的效果。     

Pediatric upper extremity burns: outcomes of emergency department triage and outpatient management.

Pediatric upper extremity burns are common. Though current American Burn Association guidelines recommend burn unit referral for burns involving the hands or major joints, many minor injuries are treated in the emergency department (ED) or outpatient setting. Despite the large number of burn patients managed by primary care providers, no large studies have been performed to assess effectiveness. A retrospective 5-year review of the epidemiology and outcomes associated with pediatric upper extremity burns treated at an urban ED was performed. Two hundred sixty-nine patients were identified. The mechanism of burn, percentage of total body surface area (%TBSA) affected, plastic surgery consultations (for wound management recommendations and additional treatment), complications, and surgical interventions were examined. Mechanisms of burn included direct contact (47%), scald (29%), flame (12%), electrical (10%), and friction or chemical (1.5%). Fifty percent of patients suffered from burns over less than 1% TBSA; close to 95% had burns on less than 5% TBSA. Seventy-five percent of patients had second-degree burns, 21% had first-degree burns, and 2% had third-degree burns. Forty patients (15%) had a plastic surgery consult. Seven patients (3%) required skin grafting. Complications occurred in five (2%) patients and included two cases of hypertrophic scarring; two patients with flexor contractures, one case of compartment syndrome requiring fasciotomy, and one late infection. These results suggest that although significant burns are usually cared for in specialized burn centers, the majority of childhood burns to the upper extremity are relatively minor and often treated in the primary care setting. Most patients had small areas of injury and healed without complications. Contact burns are an ever-increasing proportion of childhood burns and should be seemingly preventable. Education to parents and primary care physicians should be reemphasized. It appears that minor upper extremity burns treated by our urban ED staff are handled appropriately and result in favorable outcomes.