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1.
Eur Spine J ; 31(3): 604-613, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-35072795

RESUMO

PURPOSE: Recurrent lumbar disk herniation (rLDH) following lumbar microdiscectomy is common. While several risk factors for primary LDH have been described, risk factors for rLDH have only sparsely been investigated. We evaluate the effect of Body mass index (BMI) and smoking on the incidence and timing of rLDH. METHODS: From a prospective registry, we identified all patients undergoing primary tubular microdiscectomy (tMD), with complete BMI and smoking data, and a minimum 12-month follow-up. We defined rLDH as reherniation at the same level and side requiring surgery. Overweight was defined as BMI > 25, and obesity as BMI > 30. Intergroup comparisons and age- and gender-adjusted multivariable regression were carried out. We conducted a survival analysis to assess the influence of BMI and smoking on time to reoperation. RESULTS: Of 3012 patients, 166 (5.5%) underwent re-microdiscectomy for rLDH. Smokers were reoperated more frequently (6.4% vs. 4.0%, p = 0.007). Similarly, rLDH was more frequent in obese (7.5%) and overweight (5.9%) than in normal-weight patients (3.3%, p = 0.017). Overweight smokers had the highest rLDH rate (7.6%). This effect of smoking (Odds ratio: 1.63, 96% CI: 1.12-2.36, p = 0.010) and BMI (Odds ratio: 1.09, 95% CI: 1.02-1.17, p = 0.010) persisted after controlling for age and gender. Survival analysis demonstrated that rLDH did not occur earlier in overweight patients and/or smokers. CONCLUSIONS: BMI and smoking may directly contribute to a higher risk of rLDH, but do not accelerate rLDH development. Smoking cessation and weight loss in overweight or obese patients ought to be recommended with discectomy to reduce the risk for rLDH.


Assuntos
Deslocamento do Disco Intervertebral , Discotomia/efeitos adversos , Humanos , Deslocamento do Disco Intervertebral/epidemiologia , Deslocamento do Disco Intervertebral/etiologia , Deslocamento do Disco Intervertebral/cirurgia , Vértebras Lombares/cirurgia , Sobrepeso/complicações , Sobrepeso/epidemiologia , Sobrepeso/cirurgia , Recidiva , Fumar/efeitos adversos , Fumar/epidemiologia
2.
Neurosurgery ; 81(6): 899-909, 2017 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-28368482

RESUMO

BACKGROUND: Emergency room physicians, trauma teams, and neurosurgeons are seeing increasing numbers of head-injured patients on anticoagulants, many of whom are nonoperative. Head injury and anticoagulation can lead to devastating consequences. These patients need immediate evaluation and often reversal of anticoagulation in order to decrease their high rates of morbidity and mortality. OBJECTIVE: To review data on the prevalence, risks, treatment, and complications of head-injured anticoagulated patients and provide a proposal for their anticoagulant management, and imaging requirements. METHODS: A PubMed database search was performed for articles on the prevalence, risks, treatment, and complications of patients who have sustained a head injury while on anticoagulant or antiplatelet agents. RESULTS: A total of 1877 articles were found, of which 64 were selected for use based on direct relevance, information quality, and contribution of the article to the current understanding of anticoagulated head injury patients. CONCLUSION: There are very few guidelines for the management of nonoperative head-injured patients. Rapid reversal guided by international normalized ratio values, Platelet Function Assays, computed tomography imaging of the head, and physical exam is suggested. The proposal presented in this paper enables patient management to begin quickly in a systematic approach, with the goal of achieving a significant decrease in the morbidity and mortality for the anticoagulated head-injured patient. Rapid reversal can potentially decrease mortality by as much as 38%.


Assuntos
Anticoagulantes/uso terapêutico , Lesões Encefálicas Traumáticas/complicações , Lesões Encefálicas Traumáticas/terapia , Transtornos da Coagulação Sanguínea/tratamento farmacológico , Feminino , Humanos , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios X
3.
J Neurotrauma ; 32(22): 1822-32, 2015 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-26096267

RESUMO

Traumatic brain injury (TBI) often results in persistent attention and memory deficits that are associated with hippocampal dysfunction. Although deep brain stimulation (DBS) is used to treat neurological disorders related to motor dysfunction, the effectiveness of stimulation to treat cognition remains largely unknown. In this study, adult male Harlan Sprague-Dawley rats underwent a lateral fluid percussion or sham injury followed by implantation of bipolar electrodes in the medial septal nucleus (MSN) and ipsilateral hippocampus. In the first week after injury, there was a significant decrease in hippocampal theta oscillations that correlated with decreased object exploration and impaired performance in the Barnes maze spatial learning task. Continuous 7.7 Hz theta stimulation of the medial septum significantly increased hippocampal theta oscillations, restored normal object exploration, and improved spatial learning in injured animals. There were no benefits with 100 Hz gamma stimulation, and stimulation of sham animals at either frequency did not enhance performance. We conclude, therefore, that there was a theta frequency-specific benefit of DBS that restored cognitive function in brain-injured rats. These data suggest that septal theta stimulation may be an effective and novel neuromodulatory therapy for treatment of persistent cognitive deficits following TBI.


Assuntos
Lesões Encefálicas/fisiopatologia , Lesões Encefálicas/psicologia , Transtornos Cognitivos/etiologia , Transtornos Cognitivos/terapia , Hipocampo/fisiopatologia , Núcleos Septais/fisiopatologia , Animais , Transtornos Cognitivos/psicologia , Terapia por Estimulação Elétrica , Eletrodos Implantados , Eletroencefalografia , Comportamento Exploratório , Ritmo Gama , Masculino , Aprendizagem em Labirinto , Desempenho Psicomotor , Ratos , Ratos Sprague-Dawley , Ritmo Teta
5.
J Neurointerv Surg ; 7(3): e11, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24699566

RESUMO

Superior sagittal sinus (SSS) thrombosis has high morbidity and mortality, and urgent recanalization is critical for severe cases. Standard endovascular techniques for thrombolysis and thrombectomy use retrograde venous access, an approach that may be unsuccessful in cases with extensive firm clot burden involving the dural sinuses distal to the SSS. An anterior open transcranial approach to the SSS for catheter sheath placement to facilitate antegrade mechanical thrombectomy and thrombolysis of the SSS and more distal sinuses has not been previously described. Here we describe a case in which multiple unsuccessful attempts at retrograde endovascular access were attempted. Thus, a burr hole over the anterior SSS was performed for daily endovascular antegrade procedures using the Angiojet rheolytic catheter device and chemical thrombolysis. Near-complete recanalization of the SSS was achieved with venous outflow via dilated left transverse and left sigmoid sinuses, along with significant collateral flow in multiple cerebral veins.

6.
World J Clin Cases ; 2(8): 351-6, 2014 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-25133146

RESUMO

AIM: To study the risks and benefits of intracerebroventricular (ICV) opiate pumps for the management of benign head and face pain. METHODS: SSix patients with refractory trigeminal neuralgia and/or cluster headaches were evaluated for implantation of an ICV opiate infusion pump using either ICV injections through an Ommaya reservoir or external ventricular drain. Four patients received morphine ICV pumps and two patientS received a hydromorphone pump. Of the Four patients with morphine ICV pumps, one patient had the medication changed to hydromorphone. Preoperative and post-operative visual analog scores (VAS) were obtained. Patients were evaluated post-operatively for a minimum of 3 mo and the pump dosage was adjusted at each outpatient clinic visit according to the patient's pain level. RESULTS: All 6 patients had an intracerebroventricular opiate injection trial period, using either an Ommaya reservoir or an external ventricular drain. There was an average VAS improvement of 75.8%. During the trial period, no complications were observed. Pump implantation was performed an average of 3.7 wk (range 1-7) after the trial injections. After implantation, an average of 20.7 ± 8.3 dose adjustments were made over 3-56 mo after surgery to achieve maximal pain relief. At the most recent follow-up (26.2 mo, range 3-56), VAS scores significantly improved from an average of 7.8 ± 0.5 (range 6-10) to 2.8 ± 0.7 (range 0-5) at the final dose (mean improvement 5.0 ± 1.0, P < 0.001). All patients required a stepwise increase in opiate infusion rates to achieve maximal benefit. The most common complications were nausea and drowsiness, both of which resolved with pump adjustments. On average, infusion pumps were replaced every 4-5 years. CONCLUSION: These results suggest that ICV delivery of opiates may potentially be a viable treatment option for patients with intractable pain from trigeminal neuralgia or cluster headache.

7.
BMJ Case Rep ; 20142014 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-24692369

RESUMO

Superior sagittal sinus (SSS) thrombosis has high morbidity and mortality, and urgent recanalization is critical for severe cases. Standard endovascular techniques for thrombolysis and thrombectomy use retrograde venous access, an approach that may be unsuccessful in cases with extensive firm clot burden involving the dural sinuses distal to the SSS. An anterior open transcranial approach to the SSS for catheter sheath placement to facilitate antegrade mechanical thrombectomy and thrombolysis of the SSS and more distal sinuses has not been previously described. Here we describe a case in which multiple unsuccessful attempts at retrograde endovascular access were attempted. Thus, a burr hole over the anterior SSS was performed for daily endovascular antegrade procedures using the Angiojet rheolytic catheter device and chemical thrombolysis. Near-complete recanalization of the SSS was achieved with venous outflow via dilated left transverse and left sigmoid sinuses, along with significant collateral flow in multiple cerebral veins.


Assuntos
Seio Sagital Superior , Trombectomia/métodos , Terapia Trombolítica , Trombose/tratamento farmacológico , Trombose/cirurgia , Procedimentos Endovasculares/métodos , Feminino , Fibrinolíticos/uso terapêutico , Humanos , Pessoa de Meia-Idade , Crânio/cirurgia , Terapia Trombolítica/instrumentação , Ativador de Plasminogênio Tecidual/uso terapêutico
8.
J Neurosurg Pediatr ; 13(3): 307-14, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24410128

RESUMO

OBJECT: Traumatic brain injury (TBI) is a leading cause of injury, hospitalization, and death among pediatric patients. Admission CT scans play an important role in classifying TBI and directing clinical care, but little is known about the differences in CT findings between pediatric and adult patients. The aim of this study was to determine if radiographic differences exist between adult and pediatric TBI. METHODS: The authors retrospectively analyzed TBI registry data from 1206 consecutive patients with nonpenetrating TBI treated at a Level 1 adult and pediatric trauma center over a 30-month period. RESULTS: The distribution of sex, race, and Glasgow Coma Scale (GCS) score was not significantly different between the adult and pediatric populations; however, the distribution of CT findings was significantly different. Pediatric patients with TBI were more likely to have skull fractures (OR 3.21, p < 0.01) and epidural hematomas (OR 1.96, p < 0.01). Pediatric TBI was less likely to be associated with contusion, subdural hematoma, subarachnoid hemorrhage, or compression of the basal cisterns (p < 0.05). Rotterdam CT scores were significantly lower in the pediatric population (2.3 vs 2.6, p < 0.001). CONCLUSIONS: There are significant differences in the CT findings in pediatric versus adult TBI, despite statistical similarities with regard to clinical severity of injury as measured by the GCS. These differences may be due to anatomical characteristics, the biomechanics of injury, and/or differences in injury mechanisms between pediatric and adult patients. The unique characteristics of pediatric TBI warrant consideration when formulating a clinical trial design or predicting functional outcome using prognostic models developed from adult TBI data.


Assuntos
Lesões Encefálicas/complicações , Lesões Encefálicas/diagnóstico por imagem , Hemorragia Intracraniana Traumática/diagnóstico por imagem , Hemorragia Intracraniana Traumática/etiologia , Tomografia Computadorizada por Raios X , Adolescente , Adulto , Lesões Encefálicas/cirurgia , California , Criança , Pré-Escolar , Feminino , Escala de Coma de Glasgow , Hematoma Epidural Craniano/diagnóstico por imagem , Hematoma Epidural Craniano/etiologia , Hematoma Subdural/diagnóstico por imagem , Hematoma Subdural/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Transferência de Pacientes , Prognóstico , Sistema de Registros , Estudos Retrospectivos , Fraturas Cranianas/diagnóstico por imagem , Fraturas Cranianas/etiologia , Hemorragia Subaracnóidea/diagnóstico por imagem , Hemorragia Subaracnóidea/etiologia
9.
Lancet Neurol ; 12(6): 546-53, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23664370

RESUMO

BACKGROUND: On the basis of mixed results from previous trials, we assessed whether therapeutic hypothermia for 48-72 h with slow rewarming improved mortality in children after brain injury. METHODS: In this phase 3, multicenter, multinational, randomised controlled trial, we included patients with severe traumatic brain injury who were younger than 18 years and could be enrolled within 6 h of injury. We used a computer-generated randomisation sequence to randomly allocate patients (1:1; stratified by site and age [<6 years, 6-15 years, 16-17 years]) to either hypothermia (rapidly cooled to 32-33°C for 48-72 h, then rewarmed by 0·5-1·0°C every 12-24 h) or normothermia (maintained at 36·5-37·5°C). The primary outcome was mortality at 3 months, assessed by intention-to-treat analysis; secondary outcomes were global function at 3 months after injury using the Glasgow outcome scale (GOS) and the GOS-extended pediatrics, and the occurrence of serious adverse events. Investigators assessing outcomes were masked to treatment. This trial is registered with ClinicalTrials.gov, number NCT00222742. FINDINGS: The study was terminated early for futility after an interim data analysis on data for 77 patients (enrolled between Nov 1, 2007, and Feb 28, 2011): 39 in the hypothermia group and 38 in the normothermia group. We detected no between-group difference in mortality 3 months after injury (6 [15%] of 39 patients in the hypothermia group vs two [5%] of 38 patients in the normothermia group; p=0·15). Poor outcomes did not differ between groups (in the hypothermia group, 16 [42%] patients had a poor outcome by GOS and 18 [47%] had a poor outcome by GOS-extended paediatrics; in the normothermia group, 16 [42%] patients had a poor outcome by GOS and 19 [51%] of 37 patients had a poor outcome by GOS-extended paediatrics). We recorded no between-group differences in the occurrence of adverse events or serious adverse events. INTERPRETATION: Hypothermia for 48 h with slow rewarming does not reduce mortality of improve global functional outcome after paediatric severe traumatic brain injury. FUNDING: National Institute of Neurological Disorders and Stroke and National Institutes of Health.


Assuntos
Temperatura Corporal , Lesões Encefálicas/mortalidade , Lesões Encefálicas/terapia , Hipotermia Induzida/mortalidade , Hipotermia Induzida/métodos , Índice de Gravidade de Doença , Adolescente , Temperatura Corporal/fisiologia , Lesões Encefálicas/fisiopatologia , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Fatores de Tempo
10.
J Neurosurg ; 118(4): 776-82, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23394343

RESUMO

OBJECT: Decompressive craniectomy plays an important role in the management of patients with traumatic brain injury (TBI) and stroke. Risks of decompressive craniectomy include those associated with cranioplasty, and may be related to adhesions that develop between the brain surface and overlying scalp and temporalis muscle. The authors report their institutional experience using a multilayered technique (collagen and gelatin film barriers) to facilitate safe and rapid cranioplasty following decompressive craniectomy. METHODS: The authors conducted a retrospective chart review of 62 consecutive adult and pediatric patients who underwent decompressive craniectomy and subsequent cranioplasty between December 2007 and January 2011. Diagnoses included TBI, ischemic stroke, intraparenchymal hemorrhage, or subarachnoid hemorrhage. A detailed review of clinical charts was performed, including anesthesia records and radiographic study results. RESULTS: The majority of patients underwent unilateral hemicraniectomy (n = 56), with indications for surgery including midline shift (n = 37) or elevated intracranial pressure (n = 25). Multilayered decompressive craniectomy was safe and easy to perform, and was associated with a low complication rate, minimal operative time, and limited blood loss. CONCLUSIONS: Decompressive craniectomy repair using an absorbable gelatin film barrier facilitates subsequent cranioplasty by preventing adhesions between intracranial contents and the overlying galea aponeurotica and temporalis muscle fascia. This technique makes cranioplasty dissection faster and potentially safer, which may improve clinical outcomes. The indications for gelatin film should be expanded to include placement in the epidural space after craniectomy.


Assuntos
Lesões Encefálicas/cirurgia , Craniectomia Descompressiva/métodos , Gelatina , Retalhos Cirúrgicos , Adolescente , Adulto , Criança , Pré-Escolar , Cicatriz/prevenção & controle , Colágeno , Feminino , Humanos , Masculino , Estudos Retrospectivos , Aderências Teciduais/prevenção & controle , Resultado do Tratamento , Adulto Jovem
11.
J Neurotrauma ; 30(2): 131-9, 2013 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-23016534

RESUMO

More than 5,000,000 survivors of traumatic brain injury (TBI) live with persistent cognitive deficits, some of which likely derive from hippocampal dysfunction. Oscillatory activity in the hippocampus is critical for normal learning and memory functions, and can be modulated using deep brain stimulation techniques. In this pre-clinical study, we demonstrate that lateral fluid percussion TBI results in the attenuation of hippocampal theta oscillations in the first 6 days after injury, which correlate with deficits in the Barnes maze spatial working memory task. Theta band stimulation of the medial septal nucleus (MSN) results in a transient increase in hippocampal theta activity, and when delivered 1 min prior to training in the Barnes maze, it significantly improves spatial working memory. These results suggest that MSN theta stimulation may be an effective neuromodulatory technique for treatment of persistent learning and memory deficits after TBI.


Assuntos
Lesões Encefálicas/terapia , Estimulação Encefálica Profunda/métodos , Memória de Curto Prazo/fisiologia , Núcleos Septais/fisiopatologia , Animais , Lesões Encefálicas/fisiopatologia , Modelos Animais de Doenças , Eletroencefalografia , Masculino , Aprendizagem em Labirinto/fisiologia , Ratos , Ratos Sprague-Dawley
12.
Restor Neurol Neurosci ; 31(2): 141-53, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23247061

RESUMO

PURPOSE: Second insults following traumatic brain injury (TBI), such as ischemia and hypoxia, significantly worsen outcome in patients and in experimental models of TBI. Following TBI there is a pathological increase in intracellular calcium, triggering cellular mechanisms of dysfunction and death. N-type specific voltage gated calcium channel (VGCC) blockers reduce cell death in both in vitro mechanical strain injury (MSI) and in vivo models of TBI, but they have not been previously explored in a model of TBI followed by a second insult. METHODS: In the following studies, cortical neurons and astrocytes experienced MSI followed by incubation in 20% CO2. Cultures were treated with the N-type VGCC blocker, ω-conopeptide SNX-185 (1 µM), 5-minutes post-injury and intracellular calcium accumulation was assessed at 3, 6 and 24 h. Neuronal viability was assessed 24 h after MSI. RESULTS: Increasing incubator CO2 to 20% significantly increased calcium accumulation and cell death regardless of MSI severity. Treatment with 1 µM of SNX-185 significantly reduced the accumulation of calcium 3 hours following injury and increased the number of viable neurons 24 h post-injury and incubation in 20% CO2. CONCLUSIONS: In vitro models provide a critical tool for identifying roles of cell specific mechanisms involved in neuronal dysfunction and death following injury. These data demonstrate the potential of N-type VGCC blockers in reducing the damaging effects of TBI and second insults.


Assuntos
Lesões Encefálicas/tratamento farmacológico , Bloqueadores dos Canais de Cálcio/uso terapêutico , Córtex Cerebral/lesões , Fármacos Neuroprotetores/uso terapêutico , ômega-Conotoxinas/uso terapêutico , Animais , Astrócitos/efeitos dos fármacos , Cálcio/metabolismo , Bloqueadores dos Canais de Cálcio/farmacologia , Células Cultivadas , Córtex Cerebral/efeitos dos fármacos , Neurônios/efeitos dos fármacos , Fármacos Neuroprotetores/farmacologia , Ratos , Recidiva , ômega-Conotoxinas/farmacologia
13.
Arch Pediatr Adolesc Med ; 166(8): 725-31, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22473883

RESUMO

OBJECTIVE: To describe the clinical presentations and outcomes of children with intraventricular hemorrhages (IVHs) after blunt head trauma (BHT). DESIGN: Subanalysis of a large, prospective, observational cohort study performed from June 1, 2004, through September 31, 2006. SETTING: Twenty-five emergency departments participating in the Pediatric Emergency Care Applied Research Network. Patients Children presenting with IVH after BHT. Exposure Blunt head trauma. MAIN OUTCOME MEASURES: Clinical presentations and outcomes, including the Pediatric Overall Performance Category (POPC) and Pediatric Cerebral Performance Category (PCPC) scores at hospital discharge. RESULTS: Of 15 907 patients evaluated with computed tomography, 1156 (7.3%) had intracranial injuries. Forty-three of the 1156 (3.7%; 95% CI, 2.7%-5.0%) had nonisolated IVHs (ie, with intracranial injuries on computed tomography), and 10 of 1156 (0.9%; 95% CI, 0.4%-1.6%) had isolated IVHs. Only 4 of 43 (9.3%) of those with nonisolated IVHs had Glasgow Coma Scale (GCS) scores of 14 to 15, and all 10 (100.0%) with isolated IVHs had GCS scores of 15. No patients with isolated IVHs required neurosurgery or died. One patient had moderate overall disability (by the POPC score), and no patient had moderate or severe disability at discharge (by the PCPC score). Of the 43 patients with nonisolated IVHs, however, 16 (37.2%) died and 18 (41.9%) required neurosurgery. In 27 patients (62.8%), injuries ranged from moderate overall disability to brain death by the POPC score. CONCLUSIONS: Children with nonisolated IVHs after BHT typically present with GCS scores of less than 14, frequently require neurosurgery, and have high mortality rates. In contrast, those with isolated IVHs typically present with normal mental status and are at low risk for acute adverse events and poor outcomes.


Assuntos
Lesões Encefálicas/complicações , Traumatismos Craniocerebrais/complicações , Hemorragia Intracraniana Traumática/etiologia , Adolescente , Criança , Pré-Escolar , Traumatismos Craniocerebrais/diagnóstico por imagem , Serviço Hospitalar de Emergência , Feminino , Humanos , Lactente , Recém-Nascido , Hemorragia Intracraniana Traumática/diagnóstico por imagem , Hemorragia Intracraniana Traumática/mortalidade , Masculino , Avaliação de Resultados em Cuidados de Saúde , Estudos Prospectivos , Tomografia Computadorizada por Raios X , Ferimentos não Penetrantes/diagnóstico por imagem
14.
World Neurosurg ; 78(5): 498-504, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22381303

RESUMO

OBJECTIVE: Incisional cerebrospinal fluid (CSF) leakage after cranial surgery is a significant cause of morbidity due to poor wound healing and infection, meningitis, and pseudomeningocele formation. Many common dural closure techniques, such as sutures, autologous grafts, gelatin or collagen sponges, and fibrin glues, are used to achieve watertight closure, although none are US Food and Drug Administration approved for this use. DuraSeal Dural Sealant System is a polyethylene glycol (PEG) hydrogel approved by the U.S. Food and Drug Administration for obtaining watertight dural closure when applied after standard dural suturing. This multicenter, prospective randomized study further evaluated the safety of a PEG hydrogel compared with common dural sealing techniques. METHODS: A total of 237 patients undergoing elective cranial surgery at 17 institutions were randomized to dural closure augmented with the PEG hydrogel or a control "standard of care" dural sealing technique after Valsalva maneuver demonstrated an intraoperative nonwatertight dural closure. Data were collected on complications resulting in unplanned postoperative interventions or reoperations, surgical site infections, CSF leaks, and other neurological complications within 30 days. Surgeons also provided data on the ease of use of the dural sealing techniques, as well as preparation and application times. RESULTS: The incidences of neurosurgical complications, surgical site infections, and CSF leaks were similar between treatment and control groups, with no statistically significant difference between the measures. In the PEG hydrogel group (n = 120), the incidence of neurosurgical complications was 5.8% (n = 7), the incidence of surgical site infections was 1.7% (n = 2), and the incidence of CSF leak was 0.8% (n = 1). In the control group (n = 117), the incidence of neurosurgical complications was 7.7% (n = 9), the incidence of surgical site infection was 2.6% (n = 3), and the incidence of CSF leak was 1.7% (n = 2). Sealant preparation time was less than 5 minutes in 96.6% of the PEG hydrogel group compared with 66.4% of controls (P < 0.001). The dural augmentation was applied in less than 1 minute in 85.7% of the PEG hydrogel group compared with 66.4% of the control group (P < 0.001). CONCLUSIONS: The PEG hydrogel dural sealant used in this study has a similar safety profile to commonly used dural sealing techniques when used as dural closure augmentation in cranial surgery. The PEG hydrogel dural sealant demonstrated faster preparation and application times than other commonly used dural sealing techniques.


Assuntos
Encefalopatias/cirurgia , Procedimentos Neurocirúrgicos/métodos , Oligopeptídeos/administração & dosagem , Oligopeptídeos/efeitos adversos , Polietilenoglicóis/administração & dosagem , Polietilenoglicóis/efeitos adversos , Complicações Pós-Operatórias/prevenção & controle , Vazamento de Líquido Cefalorraquidiano , Rinorreia de Líquido Cefalorraquidiano/prevenção & controle , Combinação de Medicamentos , Dura-Máter/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Método Simples-Cego , Infecção da Ferida Cirúrgica/prevenção & controle , Técnicas de Sutura , Resultado do Tratamento
16.
J Neurosurg ; 115(3): 602-11, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21663415

RESUMO

OBJECT: Posttraumatic vasospasm (PTV) is an underrecognized cause of ischemic damage after severe traumatic brain injury (TBI) that independently predicts poor outcome. There are, however, no guidelines for PTV screening and management, partly due to limited understanding of its pathogenesis and risk factors. METHODS: A database review of 46 consecutive cases of severe TBI in pediatric and adult patients was conducted to identify risk factors for the development of PTV. Univariate analysis was performed to identify potential risk factors for PTV, which were subsequently analyzed using a multivariate logistic regression model to calculate odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS: Fever on admission was an independent risk factor for development of PTV (OR 22.2, 95% CI 1.9-256.8), and patients with hypothermia on admission did not develop clinically significant vasospasm during their hospital stay. The presence of small parenchymal contusions was also an independent risk factor for PTV (OR 7.8, 95% CI 0.9-69.5), whereas the presence of subarachnoid hemorrhage or other patterns of intracranial injury were not. Other variables, such as age, sex, ethnicity, degree of TBI severity, or admission laboratory values, were not independent predictors for the development of clinically significant PTV. CONCLUSIONS: Independent risk factors for PTV include parenchymal contusions and fever. These results suggest that diffuse mechanical injury and activation of inflammatory pathways may be underlying mechanisms for the development of PTV, and that a subset of patients with these risk factors may be an appropriate population for aggressive screening. Further studies are needed to determine if treatments targeting fever and inflammation may be effective in reducing the incidence of vasospasm following severe TBI.


Assuntos
Lesões Encefálicas/complicações , Febre/complicações , Hemorragias Intracranianas/complicações , Vasoespasmo Intracraniano/etiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco
17.
J Neurotrauma ; 28(1): 155-65, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-20954887

RESUMO

Anemia is recognized as a possible cause of secondary injury following traumatic brain injury (TBI). Cogent arguments can be made for both liberal and restrictive blood transfusion practices in this setting. In this narrative review, we summarize available knowledge regarding the risks of anemia and transfusion in patients with TBI. Laboratory studies using animal models and healthy human subjects suggest that anemia below a hemoglobin (Hb) concentration of 7 g/dL results in impaired brain function and below 10 g/dL may be detrimental to recovery from TBI. Clinical studies that have evaluated the association of anemia with clinical outcomes have not consistently demonstrated harm, but they generally have important methodological weaknesses. Alternatively, studies that have analyzed transfusion as a predictor of worse outcome have consistently identified such an association, but these studies may involve residual confounding. What little information exists from randomized trials that have included patients with TBI and evaluated liberal versus restrictive transfusion strategies is inconclusive. Since anemia in the setting of TBI is relatively common and there is considerable variation in transfusion preferences, greater study of this topic - preferably with one or more rigorous, adequately powered, non-inferiority randomized trials - is desirable.


Assuntos
Anemia/etiologia , Anemia/terapia , Lesões Encefálicas/complicações , Reação Transfusional , Animais , Humanos , Resultado do Tratamento
18.
Korean J Spine ; 8(4): 272-82, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26064145

RESUMO

OBJECTIVES: The spontaneous spinal epidural hematoma (SSEH) is a rare clinical entity. Patients typically present with sudden onset back pain followed by neurological deficits. METHODS: Diagnosis of SSEH is usually made with MRI and standard treatment is surgical evacuation. In 1996, Groen published the most comprehensive review on the SSEH in which he analyzed 333 cases. We review 104 cases of SSEH presented in the English literature since the last major review and add three of our own cases, for a total of 107 cases. RESULTS: Our patients presented with back pain and neurologic deficits. Two made excellent functional recovery with prompt surgical decompression while one continued to have significant deficits despite evacuation. Better postoperative outcome was associated with less initial neurological dysfunction, shorter time to operation from symptom onset and male patients. CONCLUSION: We discuss the etiology of SSEH and report current trends in diagnosis, treatment, and outcome.

19.
Stroke ; 41(10): 2391-5, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-20798370

RESUMO

BACKGROUND AND PURPOSE: In clinical trials and observational studies there is considerable inconsistency in the use of definitions to describe delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage. A major cause for this inconsistency is the combining of radiographic evidence of vasospasm with clinical features of cerebral ischemia, although multiple factors may contribute to DCI. The second issue is the variability and overlap of terms used to describe each phenomenon. This makes comparisons among studies difficult. METHODS: An international ad hoc panel of experts involved in subarachnoid hemorrhage research developed and proposed a definition of DCI to be used as an outcome measure in clinical trials and observational studies. We used a consensus-building approach. RESULTS: It is proposed that in observational studies and clinical trials aiming to investigate strategies to prevent DCI, the 2 main outcome measures should be: (1) cerebral infarction identified on CT or MRI or proven at autopsy, after exclusion of procedure-related infarctions; and (2) functional outcome. Secondary outcome measure should be clinical deterioration caused by DCI, after exclusion of other potential causes of clinical deterioration. Vasospasm on angiography or transcranial Doppler can also be used as an outcome measure to investigate proof of concept but should be interpreted in conjunction with DCI or functional outcome. CONCLUSIONS: The proposed measures reflect the most relevant morphological and clinical features of DCI without regard to pathogenesis to be used as an outcome measure in clinical trials and observational studies.


Assuntos
Isquemia Encefálica/etiologia , Hemorragia Subaracnóidea/complicações , Isquemia Encefálica/diagnóstico por imagem , Ensaios Clínicos como Assunto , Humanos , Avaliação de Resultados em Cuidados de Saúde , Radiografia , Hemorragia Subaracnóidea/diagnóstico por imagem , Resultado do Tratamento
20.
J Neurosurg Spine ; 13(2): 240-5, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20672961

RESUMO

Significant progress has been made in lumbar and cervical disc replacement therapy. Several cervical disc prostheses have recently gained FDA approval. Although arthroplasty has not been previously described in the thoracic spine, selected patients with long-segment fusion to the level of C-7 have altered cervicothoracic and upper thoracic biomechanics and may benefit from motion-preservation therapy for T1-2 disc herniation. Currently, FDA-approved prostheses are indicated only for patients with single-level degenerative disc disease between C-3 and C-7 and no history of cervical arthrodesis. The authors describe a 52-year-old woman who had previously undergone C3-7 fusion and returned 4 years later with symptoms of C-8 myeloradiculopathy and radiological evidence of T1-2 degenerative disc disease. She underwent T1-2 arthroplasty in which a Prestige artificial cervical disc was placed via an anterior cervicothoracic approach. Motion at C7-T1 and T1-2 was preserved, and the patient made an excellent clinical recovery.


Assuntos
Discotomia/métodos , Deslocamento do Disco Intervertebral/cirurgia , Fusão Vertebral/métodos , Vértebras Torácicas/cirurgia , Feminino , Humanos , Pessoa de Meia-Idade , Recuperação de Função Fisiológica , Resultado do Tratamento
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