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OBJECTIVE@#To observe the intervention effect of damage control orthopaedic(DCO) strategy on fat embolism syndrome(FES) associated with long shaft fracture of lower limbs.@*METHODS@#Retrospective analysis was made on the clinical data of 163 patients with FES associated with lower limb long shaft fractures admitted from January 2015 to May 2021. They were divided into two groups based on the time point of implementing DCO strategy in January 2018. Total of 92 patients were admitted from January 2015 to December 2017 as the control group, and other 71 patients were admitted from January 2018 to May 2021 as the intervention group. The hospital mortality, arterial oxygen saturation (SaO2), arterial partial pressure of oxygen (PaO2) and oxygenation index (OI), hemoglobin (Hb), platelet count(PLT), Harris score of hip joint, HSS score of knee joint, AOFAS score of ankle joint, clinical efficacy and complications were observed and compared between two groups.@*RESULTS@#Total of 163 patients were followed up for 12 to 18 months with an average of (16.91±1.22) months. The in-hospital mortality rate in the intervention group was 2.82% (2/71), and that in the control group was 16.30% (15/92), the difference between two groups was statistically significant(χ2=6.455, P<0.05). After the intervention, SaO2, PaO2 and OI in two groups were higher than those before the intervention(P<0.05), and after the intervention, SaO2, PaO2 and OI in two groups were statistically significant(P<0.05). Hb and PLT in two groups after intervention were higher than those before intervention (P<0.001), and there was statistically significant difference in Hb and PLT between two groups after intervention (P<0.05). The Harris score of hip joint, HSS score of knee joint and AOFAS score of ankle joint in both groups after 3 months of treatment were better than those before treatment (P<0.05). The total clinical effective rate of the intervention group was higher than that of the control group(χ2=4.194, P<0.05). The total incidence of complications in the intervention group was lower than that in the control group(χ2=4.747, P<0.05).@*CONCLUSION@#DCO strategy is helpful to reduce the in-hospital mortality of patients with FES associated with long shaft fracture of lower extremities, eliminate FES symptoms and stabilize vital signs, gain time advantage for phase Ⅱ definitive surgery, and has significant clinical intervention effect, which is worth popularizing.
Subject(s)
Humans , Orthopedics , Retrospective Studies , Fractures, Bone , Treatment Outcome , Lower Extremity , Embolism, Fat/therapyABSTRACT
In the practice of forensic pathology, fat embolism is one of the common causes of death, which can be divided into two categories: traumatic and non-traumatic. Non-traumatic fat embolism refers to the blockage of small blood vessels by fat droplets in the circulatory blood flow caused by non-traumatic factors such as underlying diseases, stress, poisoning and lipid metabolism disorders. At present, it is believed that the production of non-traumatic fat embolism is related to the disturbance of lipid metabolism, C-reactive protein-related cascade reaction, the agglutination of chylomicron and very low-density lipoprotein. The forensic identification of the cause of death of non-traumatic fat embolism is mainly based on the case, systematic autopsy, HE staining and fat staining, but it is often missed or misdiagnosed by forensic examiners because of its unknown risk factors, hidden onset, the difficulty of HE staining observation and irregular implementation of fat staining. In view of the lack of attention to non-traumatic fat embolism in forensic identification, this paper reviews the concepts, pathophysiological mechanism, research progress, existing problems and countermeasures of non-traumatic fat embolism, providing reference for forensic scholars.
Subject(s)
Humans , Autopsy , Embolism, Fat/pathology , Forensic Medicine , Forensic Pathology , Pulmonary Embolism/pathologyABSTRACT
Objective To establish the theoretical model for morphology of lipid droplets adhering to inner vascular wall, so as to provide the theoretical model for the study and analysis of the overall morphology of lipid droplets on inner vascular wall of patients with fat embolism. MethodsThe model of the droplet with variable radius on inner wall of the cylindrical tube was established to describe morphology of lipid droplets on inner vascular wall, and accuracy of the theoretical model was verified by Surface Evolver (SE) software simulation results. According to the theoretical model, the influencing patterns of lipid droplet volume and contact angle on dimensionless adhesion area Sb0 and blockage ratio κ of lipid droplets in blood vessels were analyzed. Results The theoretical model could predict contour parameters of adhesion morphology for lipid droplets on inner vascular wall, including the height and arc radius of lipid droplet at azimuth angle of 0 and π/2. The relative errors between contour parameters obtained from the theoretical model and corresponding parameters obtained from the SE simulation were smaller than 10%. For lipid droplets with the same dimensionless volume V0, Sb0 of inner vascular wall decreased with contact angle increasing, and blockage ratio κ increased with contact angle increasing. At the same contact angle, the smaller V0 , the smaller Sb0 and κ would be. Conclusions The established theoretical model with variable radius can well describe morphological characteristics of lipid droplets on inner vascular wall. The influening pattern of volume, contact angle and other parameters on height, adhesion area and cross-sectional area of lipid droplets can be accurately and quickly obtained through the theoretical model, indicating that the larger the contact angle of lipid droplets or the smaller the dimensionless volume, the lower the probability of embolism. The research findings provide theoretical support for the analysis on related diseases.
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Resumen La liposucción es uno de los procedimientos estéticos que se realizan con mayor frecuencia a nivel mundial, con una baja incidencia de complicaciones y una mortalidad de 20 por cada 100 000 procedimientos y cuando se realiza en conjunto con una lipoinyección glútea la principal causa de muerte el embolismo graso. Se presenta el caso de una femenina de 32 años, sin patologías crónicas conocidas, la cual se asistió a un centro médico para que le realizaran una liposucción con lipoinyección glútea y falleció casi al finalizar la cirugía; en la autopsia Médico Legal se observó la presencia de material de aspecto adiposo en el tronco principal de la arteria pulmonar y en sus ramificaciones, en las cuales se obstruía por completo el lumen, mediante un estudio histopatológico se confirmó el diagnostico de embolismo graso, el cual se estableció como causa de muerte. Se realizó una revisión de la literatura sobre embolismo graso asociado a liposucción con lipoinyección glútea.
Abstract Liposuction is one of the most frequently performed cosmetic procedures worldwide, with a low incidence of complications and a mortality of 20 per 100 000 procedures, and when it is performed in conjunction with gluteal lipoinjection, the main cause of death is fat embolism. This article presents a case of a 32-year-old female, with no known chronic pathologies, who was attended at a medical center to undergo liposuction with gluteal lipoinjection and died almost at the end of the surgery; In the Medico-Legal autopsy, the presence of adipose-like material was observed in the main trunk of the pulmonary artery and in its ramifications, in which the lumen was completely obstructed, a histopathological study confirmed the diagnosis of fat embolism, which was established as the cause of death. A review of the literature about fat embolism associated with liposuction with gluteal lipoinjection was made.
Subject(s)
Humans , Female , Adult , Autopsy , Lipectomy/mortality , Embolism, Fat/diagnosis , Costa RicaABSTRACT
Resumen El síndrome de embolia grasa es una complicación inusual del trauma ortopédico. Las manifestaciones clínicas son inespecíficas y no hay una prueba diagnóstica de oro, por lo que se debe tener un alto índice de sospecha. Se describen cuatro pacientes quienes, luego de presentar fractura de huesos largos, se complicaron con síndrome de embolia grasa. La manifestación común en todos ellos fue la hipoxemia. Los hallazgos más frecuentes en la tomografía de tórax fueron opacidades en vidrio esmerilado, compromiso del pulmón derecho y de los lóbulos inferiores y derrame pleural laminar. La evolución clínica fue satisfactoria en tres pacientes; el cuarto presentó extenso compromiso pulmonar, requirió ventilación mecánica invasiva y tuvo una hospitalización prolongada. Ningún paciente falleció ni quedó con secuelas. Esta es la primera serie de casos en Colombia que muestra el comportamiento clínico e imagenológico de pacientes con síndrome de embolia grasa.
Abstract Fat embolism syndrome is an unusual complication of orthopedic trauma. The clinical manifestations are non-specific and there is no gold standard diagnostic test, so a high index of suspicion is required. Four patients are described who after presenting long bone fracture were complicated with fat embolism syndrome. The common manifestation in all of them was hypoxemia. The most frequent findings in chest tomography were ground-glass opacities, involvement of the right lung and lower lobes, and laminar pleural effusion. The clinical evolution was satisfactory in three patients; the fourth had extensive pulmonary involvement, required invasive mechanical ventilation and had a prolonged hospitalization. None of the patients died or had sequelae. This is the first case series in Colombia showing the clinical and imaging behavior of patients with fat embolism síndrome.
ABSTRACT
@#Fat Embolism Syndrome (FES) is a poorly defined clinical phenomenon which has been attributed to fat emboli entering the circulation. It is common, and its clinical presentation may be either subtle or dramatic and life threatening. This is a review of the history, causes, pathophysiology, presentation, diagnosis and management of FES. FES mostly occurs secondary to orthopaedic trauma; it is less frequently associated with other traumatic and atraumatic conditions. There is no single test for diagnosing FES. Diagnosis of FES is often missed due to its subclinical presentation and/or confounding injuries in more severely injured patients. FES is most frequently diagnosed using the Gurd and Wilson criteria, like its rivals it is not clinically validated. Although FES is a multi-system condition, its effects in the lung, brain, cardiovascular system and skin cause most morbidity. FES is mostly a self-limiting condition and treatment is supportive in nature. Many treatments have been trialled, most notably corticosteroids and heparin, however no validated treatment has been established.
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Fat embolism syndrome (FES) is a serious complication of orthopedic surgery. We describe a woman in her 30s, who experienced cerebral FES after extensive femoral tumor resection and intercalary endoprosthesis for a malignant soft tissue tumor of the thigh. Before the surgery, the patient was able to walk with a single axillary crutch, capable of independent self-care and had no cognitive problems. After the surgery, the patient developed respiratory and central nervous system symptoms, which are characteristic of FES. After critical care, we provided rehabilitation treatment, which included getting out of bed, basic motion training, cognitive rehabilitation treatment, and Activity of Daily Living (ADL) training. At the time of commencement of the rehabilitation treatment, the patient presented with higher brain dysfunctions, such as cognitive dysfunction (Mini Mental State Examination：MMSE score 21 points), attentional dysfunction and left unilateral spatial neglect (USN). However, apparent motor paralysis of the extremities was not detected. On the 95th day after the surgery, the patient's MMSE score was 29 points, and the attentional dysfunction and USN were resolved. Additionally, the patient was again able to walk with axillary crutch. Six months after the surgery, the patient could walk independently without the aid of a crutch. One year after the surgery, the patient's reinstated to work. Cerebral FES may be accompanied with higher brain dysfunction；present a variety of higher brain dysfunctions；however, the symptoms may be reversible and resolved with rehabilitation treatment.
ABSTRACT
Early diagnosis of cerebral fat embolism in a patient with contradiction to MRI is challenging. Here we report an interesting case, where the raised optic nerve sheath diameter helped us to predict the early cerebral involvement with fat emboli in a left femoral shaft fracture patient. MRI scan could not be performed due to the presence of a metallic implant in the patient from a previous surgery. He was later diagnosed as an atypical presentation of fat embolism syndrome. Optic nerve sheath monitoring also helped us to guide further management of the patient.
ABSTRACT
Fat embolism syndrome (FES) is a serious life-threatening manifestation of the fat embolism phenomenon characterized by Bergman's triad of dyspnea, petechiae and mental confusion. While fat embolization into systemic circulation is common, FES occurs in a meagre 0.05%-3% of patients having isolated long bone fractures. Though visual symptoms are commonly attributed to fat embolism retinopathy and is a later occurrence, it may not always be the case. Cortical blindness has been seldom reported in association with FES, and less so as a presenting complaint. Furthermore, no previous literature has described the same in context of an isolated tibia fracture. We report a 20-year-old gentleman with an isolated right tibia shaft fracture who developed sudden onset diminution of vision in both eyes less than 24 h following trauma with no other complaints. Lack of any remarkable ophthalmoscopic findings or other symptoms left us with a diagnostic conundrum. He later went on to develop altered mentation, hypoxia and generalized tonic-clonic seizures with subsequent MRI revealing multiple cerebral fat emboli also involving both occipital lobes. Supportive measures were instituted and his general condition as well as vision gradually improved following which he underwent plate fixation of the fracture under spinal anaesthesia. The perioperative period was uneventful and he was discharged following staple removal. At one month of follow-up, the patient had no residual visual field defects or neurological deficits. Though FES is rare among isolated tibia fractures, this clinical catastrophe may strike in any unsuspected setting thereby warranting a high index of suspicion to ensure early diagnosis and improved patient outcomes.
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A síndrome da embolia gordurosa (SEG) é definida como a presença de êmbolos gordurosos, não apenas no sistema pulmonar, como também na circulação sistêmica, com manifestações inflamatórias, neurológicas e cutâneas. Na cirurgia estética, atualmente, o material polimetilmetacrilato (PMMA) apresenta indicação para técnicas de preenchimento cutâneo, utilizado na forma injetável em pequenos procedimentos estéticos não incisionais, conhecidos como bioplastia. O presente estudo teve como objetivo fazer uma revisão sistemática de literatura para mostrar estudos clínicos que abordassem a ocorrência de síndrome da embolia gordurosa em pacientes que se submeteram a infiltração de PMMA (polimetilmetacrilato) na bioplastia. Mesmo com esgotamento de fontes e ampliação da pesquisa sistemática que seguiu os preceitos do protocolo PRISMA, a resposta foi de apenas um artigo que foi adicionado ao presente estudo. Infelizmente não há revisões ou estudos experimentais que contemplem a SEG na infiltração com PMMA. A maioria dos relatos disponibilizados é proveniente de lipoaspiração e correlacionados ao trauma ósseo quando citado o uso de PMMA. Esta revisão serve de alerta para os estudos e relatos não científicos sobre os riscos da utilização de PMMA na bioplastia, mas não se obteve relatos ou relacionados com a embolia gordurosa, potencialmente fatal.
Fat embolism syndrome (FES) is defined as the presence of fatty emboli, not only in the pulmonary system, but also in the systemic circulation, with inflammatory, neurological and cutaneous manifestations. Currently, in cosmetic surgery, the polymethylmethacrylate (PMMA) material is indicated for skin filling techniques used in injectable form in small non-incisional aesthetic procedures, known as bioplasty. The objective of this study was to carry out a systematic review of the literature to show clinical studies that addressed the appearance of fat embolism syndrome in patients who underwent PMMA (polymethylmethacrylate) infiltration in bioplasty. Even with the exhaustion of sources and the expansion of systematic research that followed the precepts of the PRISMA protocol, the answer was only one article that was added to the present study. Unfortunately, no reviews or experimental studies are looking at FES in PMMA infiltration. Most of the available reports are about liposuction and correlate with bone trauma when PMMA use is mentioned. This review serves as a wake-up call for nonscientific studies and reports on the risks of using PMMA in bioplasty, but no reports or articles were obtained related to life-threatening fat embolism.
ABSTRACT
Fat embolism syndrome (FES) is a serious complication of orthopedic surgery. We describe a woman in her 30s, who experienced cerebral FES after extensive femoral tumor resection and intercalary endoprosthesis for a malignant soft tissue tumor of the thigh. Before the surgery, the patient was able to walk with a single axillary crutch, capable of independent self-care and had no cognitive problems. After the surgery, the patient developed respiratory and central nervous system symptoms, which are characteristic of FES. After critical care, we provided rehabilitation treatment, which included getting out of bed, basic motion training, cognitive rehabilitation treatment, and Activity of Daily Living (ADL) training. At the time of commencement of the rehabilitation treatment, the patient presented with higher brain dysfunctions, such as cognitive dysfunction (Mini Mental State Examination：MMSE score 21 points), attentional dysfunction and left unilateral spatial neglect (USN). However, apparent motor paralysis of the extremities was not detected. On the 95th day after the surgery, the patient’s MMSE score was 29 points, and the attentional dysfunction and USN were resolved. Additionally, the patient was again able to walk with axillary crutch. Six months after the surgery, the patient could walk independently without the aid of a crutch. One year after the surgery, the patient’s reinstated to work. Cerebral FES may be accompanied with higher brain dysfunction；present a variety of higher brain dysfunctions；however, the symptoms may be reversible and resolved with rehabilitation treatment.
ABSTRACT
@#Non-traumatic fat embolism (NTFE) is infrequently encountered in the clinical setting. The incidence of clinically detected fat embolism is less than 1%. It is diagnosed based on the evidence of fat emboli occluding the vessel lumen in a patient with no prior history of trauma. We report a case of NTFE in a lady who developed breathlessness and collapsed following home vaginal delivery. Post-mortem examination revealed extensive fat emboli in the pulmonary vessels. We elucidate the clinical challenges in diagnosing fat embolism (FE) in a patient without history of trauma.
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Resumen Se reporta el proceso de recuperación y rehabilitación neurológica y cognitiva de una mujer joven que desarrolló un síndrome de embolia grasa con repercusiones neurológicas, después de sufrir un politraumatismo. La paciente era una mujer de 21 años de edad con fractura cerrada de húmero y fémur izquierdos, que presentó un síndrome de embolia grasa, neumotórax izquierdo e hipertensión pulmonar, en las primeras 24 horas después de un accidente. Estuvo hospitalizada un mes y quedó con varios déficits neurológicos centrales, como infartos 'lacunares' y necrosis cortical laminar occipital, así como limitaciones en la bipedestación, la marcha, la visión y las funciones cognitivas. A partir del primer mes después del alta hospitalaria, se comenzó un proceso integral de rehabilitación neurológica y cognitiva en casa, y posteriormente, en una unidad médica de rehabilitación. Durante los primeros dos años después del accidente, la paciente recibió estimulación sensorial, sensoperceptiva y motora, así como rehabilitación motora y visual intensiva. Una vez se recuperó físicamente, se inició un proceso de rehabilitación neuropsicológica. Seis años después del accidente, la paciente terminó sus estudios universitarios y hoy está laboralmente activa. El proceso de rehabilitación neurológica es complejo, individual y difícil, aunque no imposible, y no se puede estandarizar un patrón de recuperación para todos los pacientes. Si bien existe la recuperación espontánea, la cual se da en los primeros seis meses, el caso aquí reportado demuestra que, en la fase crónica, la recuperación se puede lograr, pero requiere de evaluaciones y técnicas coordinadas de rehabilitación neurológica.
Abstract We report the neurological and cognitive recovery and rehabilitation process in a young woman who developed a fat embolism syndrome with neurological repercussions secondary to multiple trauma. The patient was a 21-year-old woman with a closed fracture of the left humerus and femur. She developed fat embolism syndrome, left pneumothorax and pulmonary hypertension in the first 24 hours after the accident. After one month of hospitalization, the patient had several central neurological deficits such as lacunar infarcts and occipital laminar cortical necrosis, as well as limitations in standing, walking, vision, and cognitive functions. An integral process of neurological and cognitive rehabilitation--first at home and later in a medical rehabilitation unit-- was carried out from the first month after being released from the hospital. During the first two years after the accident, the patient received sensory and motor stimulation, motor rehabilitation, and intensive visual rehabilitation. Once recovered physically, a process of neuropsychological rehabilitation began. Six years after the accident, the patient finished her university studies and she is working actively. The neurological rehabilitation process is complex, individual and difficult, but not impossible, and a recovery pattern cannot be standardized for all patients. Although there is spontaneous recovery, which occurs in the first six months, the case here reported shows that in the chronic phase recovery can be achieved but requires evaluations and coordinated techniques of neurological rehabilitation.
Subject(s)
Female , Humans , Young Adult , Cognition Disorders/rehabilitation , Embolism, Fat/rehabilitation , Nervous System Diseases/rehabilitation , Cognition Disorders/etiology , Embolism, Fat/complications , Nervous System Diseases/etiologyABSTRACT
To introduce the diagnosis and treatment, as well as the result of a patient with fat embolism at cerebral and ophthalmic artery, following fronto-temporal autologous fat transplantation. The patient, a 39-year-old woman, who received fronto-temporal autologous fat transplantation in other hospital in May 2018. Hemiplegia and right eye blindness happened right after autologous fat transplantation. The patient was transferred to the 940th Hospital of PLA Joint Service Support Force 5 hours after operation, but the function of the limbs and the right eye were not well restored after intensive treatment. Fat embolism is the most serious complication in fat transplantation. Once it occurs, the prognosis is poor. Therefore, the process of autologous fat transplantation should be standard to prevent related complications.
ABSTRACT
PURPOSE@#Fat embolism syndrome (FES) is systemic manifestation of fat emboli in the circulation seen mostly after long bone fractures. FES is considered a lethal complication of trauma. There are various case reports and series describing FES. Here we describe the clinical characteristics, management in ICU and outcome of these patients in level I trauma center in a span of 6 months.@*METHODS@#In this prospective study, analysis of all the patients with FES admitted in our polytrauma intensive care unit (ICU) of level I trauma center over a period of 6 months (from August 2017 to January 2018) was done. Demographic data, clinical features, management in ICU and outcome were analyzed.@*RESULTS@#We admitted 10 cases of FES. The mean age of patients was 31.2 years. The mean duration from time of injury to onset of symptoms was 56 h. All patients presented with hypoxemia and petechiae but central nervous system symptoms were present in 70% of patients. The mean duration of mechanical ventilation was 11.7 days and the mean length of ICU stay was 14.7 days. There was excellent recovery among patients with no neurological deficit.@*CONCLUSION@#FES is considered a lethal complication of trauma but timely management can result in favorable outcome. FES can occur even after fixation of the fracture. Hypoxia is the most common and earliest feature of FES followed by CNS manifestations. Any patient presenting with such symptoms should raise the suspicion of FES and mandate early ICU referral.
Subject(s)
Adolescent , Adult , Humans , Male , Young Adult , Central Nervous System Diseases , Early Diagnosis , Embolism, Fat , Diagnosis , Fractures, Bone , Hypoxia , Intensive Care Units , Length of Stay , Patient Outcome Assessment , Time Factors , Trauma CentersABSTRACT
Objective • To investigate the effect of Toll-like receptor 4 (TLR4) in the pathological injury in fat embolism mice model. Methods • One hundred and twenty male C57BL/6 mice were randomly divided into 10 groups. One group was set as blank control group, and others were injected separately with 1, 2…9 μL/g of allogeneic perirenal fat via tail vein, respectively. The mortality of each group was counted, median lethal dose (LD50) of fat injection in mice was calculated by Bliss method, and the fat embolism LD50 mice model was established. The TLR4 protein expression in the pulmonary tissue of surviving mice was detected by Western blotting. Sixty male C57BL/6 mice were randomly divided into the control group (the same dose of saline was given via tail vein) and the experimental groups (group 2 h, group 8 h, group 24 h and group 48 h, the LD50 fat was given via tail vein). The TLR4 protein expression at different time after fat injection was detected by Western blotting. The mortality of 20 TLR4 gene-knockout mice (TLR4-/- mice) was recorded and compared with 60 wild-type mice after LD50 fat injection. Results • The LD50 of fat embolism mice model was (3.93±0.78) μL/g. After the injection of 1-7 μL/g fat, the expressions of TLR4 protein in the pulmonary tissue of all seven groups were significantly increased, compared with the control group (all P=0.000). In the fat embolism LD50 mice model, compared with the control group, the expressions of TLR4 protein in group 2 h were significantly increased (P=0.005). Then, expression level of TLR4 protein was gradually reduced after 2 h, and there was no significant difference between the control group and group 48 h. The mortality of TLR4-/- mice injected with LD50 fat was lower than that of wild-type mice (P=0.043). Conclusion • TLR4 protein involves in the pathologic process of fat embolism syndrome. The knockout of TLR4 gene can reduce the mortality of fat embolism mice. TLR4 and its correlated non-infectious inflammatory response may be an important molecular mechanism of biochemical injury in fat embolism syndrome. Blocking the activation of TLR4-mediated signaling pathway can significantly improve the prognosis, which provides new basis for the prevention, evaluation and treatment of fat embolism syndrome.
ABSTRACT
Objective · To investigate the effect of Toll-like receptor 4 (TLR4) in the pathological injury in fat embolism mice model. Methods · One hundred and twenty male C57BL/6 mice were randomly divided into 10 groups. One group was set as blank control group, and others were injected separately with 1, 2…9 μL/g of allogeneic perirenal fat via tail vein, respectively. The mortality of each group was counted, median lethal dose (LD50) of fat injection in mice was calculated by Bliss method, and the fat embolism LD50 mice model was established. The TLR4 protein expression in the pulmonary tissue of surviving mice was detected by Western blotting. Sixty male C57BL/6 mice were randomly divided into the control group (the same dose of saline was given via tail vein) and the experimental groups (group 2 h, group 8 h, group 24 h and group 48 h, the LD50 fat was given via tail vein).The TLR4 protein expression at different time after fat injection was detected by Western blotting. The mortality of 20 TLR4 gene-knockout mice (TLR4-/-mice) was recorded and compared with 60 wild-type mice after LD50 fat injection. Results · The LD50 of fat embolism mice model was (3.93±0.78) μL/g.After the injection of 1-7 μL/g fat, the expressions of TLR4 protein in the pulmonary tissue of all seven groups were significantly increased, compared with the control group (all P=0.000). In the fat embolism LD50 mice model, compared with the control group, the expressions of TLR4 protein in group2 h were significantly increased (P=0.005). Then, expression level of TLR4 protein was gradually reduced after 2 h, and there was no significant difference between the control group and group 48 h. The mortality of TLR4-/- mice injected with LD50 fat was lower than that of wild-type mice (P=0.043).Conclusion · TLR4 protein involves in the pathologic process of fat embolism syndrome. The knockout of TLR4 gene can reduce the mortality of fat embolism mice. TLR4 and its correlated non-infectious inflammatory response may be an important molecular mechanism of biochemical injury in fat embolism syndrome. Blocking the activation of TLR4-mediated signaling pathway can significantly improve the prognosis, which provides new basis for the prevention, evaluation and treatment of fat embolism syndrome.
ABSTRACT
El síndrome de embolismo graso (SEG) post traumático es una complicación potencialmente letal y poco sospechada. Se presenta un caso de SEG diagnosticado clínicamente y confirmado por los criterios diagnósticos vigentes; cuyas características epidemiológicas, factores de riesgo, cuadro clínico y evolución favorable después del tratamiento recibido, fueron de acuerdo a lo publicado. Se realiza una revisión de la literatura y se proponen medidas para disminuir el riesgo de su presentación y mejorar el diagnóstico oportuno
Post-traumatic fat embolism syndrome (FES) is a potentially lethal and poorly suspected complication. We present a case of FES diagnosed clinically and confirmed by current diagnostic criteria. The epidemiological characteristics, risk factors, clinical features and favorable evolution after treatment were as reported. We review the literature and propose measures to reduce the risk of its presentation and improve early diagnosis
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A 23-year-old Indian man presented with shortness of breath and new-onset confusion along with a rash on his chest on Postoperative Day 2, following internal fixation of his femur fracture. Although computed tomography pulmonary angiography was negative for filling defects in the pulmonary vasculature, it showed mosaic attenuation changes with some interlobular septal thickening. Magnetic resonance imaging of the brain showed patchy signal abnormalities, predominantly in the grey-white matter junction region with extensive susceptibility artefacts, consistent with petechial haemorrhages. The laboratory work-up showed thrombocytopenia and anaemia. A diagnosis of fat embolism syndrome was established, based on the clinical presentation combined with laboratory and imaging findings. The clinical and imaging features of fat embolism syndrome are discussed.
Subject(s)
Humans , Male , Young Adult , Brain , Pathology , Dyspnea , Embolism, Fat , Diagnostic Imaging , Femoral Fractures , Diagnostic Imaging , Hypoxia , India , Magnetic Resonance Imaging , Pulmonary Embolism , Thrombocytopenia , Tomography, X-Ray ComputedABSTRACT
At an intensive care unit, four neonates died consecutively within 80 minutes. Citrobacter freundii was isolated from blood samples of the 4 patients. It was also cultured from the leftover SMOFlipid that had been infused intravenously into the patients. In this in vitro study, we evaluated the bacterial growth kinetics and change in size of fat globules in SMOFlipid contaminated with C. freundii. Following the growth of bacteria, pH of SMOFlipid decreased to < 6, and the number of fat globules larger than 5 µm increased. Pulmonary fat embolism is proposed as a possible cause of the sudden deaths as well as fulminant sepsis.