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1.
Eur Spine J ; 33(1): 198-204, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38006474

RESUMO

PURPOSE: This study aims to demonstrate a correlation between cervical spine injury and location and severity of facial trauma. METHODS: We did a 10-year retrospective analysis of prospectively collected patients with at least one facial and/or cervical spine injury. We classified facial injuries using the Comprehensive Facial Injury (CFI) score, and stratified patients into mild (CFI < 4), moderate (4 ≤ CFI < 10) and severe facial trauma (CFI ≥ 10). The primary outcome was to recognize the severity and topography of the facial trauma which predict the probability of associated cervical spine injuries. RESULTS: We included 1197 patients: 78% with facial injuries, 16% with spine injuries and 6% with both. According to the CFI score, 48% of patients sustained a mild facial trauma, 35% a moderate one and 17% a severe one. The midface was involved in 45% of cases, then the upper facial third (13%) and the lower one (10%). The multivariate analysis showed multiple independent risk factors for associated facial and cervical spine injuries, among them an injury of the middle facial third (OR 1.11 p 0.004) and the facial trauma severity, having every increasing point of CFI score a 6% increasing risk (OR 1.06 p 0.004). CONCLUSIONS: Facial trauma is a risk factor for a concomitant cervical spine injury. Among multiple risk factors, severe midfacial trauma is an important red flag. The stratification of facial injuries based on the CFI score through CT-scan images could be a turning point in the management of patients at risk for cervical spine injuries before imaging is available.


Assuntos
Traumatismos Faciais , Lesões do Pescoço , Traumatismos da Coluna Vertebral , Humanos , Estudos Retrospectivos , Vértebras Cervicais/diagnóstico por imagem , Vértebras Cervicais/lesões , Traumatismos Faciais/diagnóstico por imagem , Traumatismos Faciais/epidemiologia , Traumatismos Faciais/complicações , Traumatismos da Coluna Vertebral/diagnóstico por imagem , Traumatismos da Coluna Vertebral/epidemiologia , Traumatismos da Coluna Vertebral/etiologia , Lesões do Pescoço/complicações , Fatores de Risco , Escala de Gravidade do Ferimento
2.
Front Bioeng Biotechnol ; 10: 780553, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35845414

RESUMO

Although the risk of trauma in space is low, unpredictable events can occur that may require surgical treatment. Hemorrhage can be a life-threatening condition while traveling to another planet and after landing on it. These exploration missions call for a different approach than rapid return to Earth, which is the policy currently adopted on the International Space Station (ISS) in low Earth orbit (LEO). Consequences are difficult to predict, given the still scarce knowledge of human physiology in such environments. Blood loss in space can deplete the affected astronaut's physiological reserves and all stored crew supplies. In this review, we will describe different aspects of hemorrhage in space, and by comparison with terrestrial conditions, the possible solutions to be adopted, and the current state of the art.

3.
Updates Surg ; 74(5): 1739-1747, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35306643

RESUMO

We conducted a prospective study comparing two different pre-hospital triage tools for trauma: the American College of Surgeons Committee on Trauma (ACS-COT) field triage decision scheme and the TRENAU score. The main objective was to evaluate which triage tool was more appropriate in the setting of Lombardy's trauma system. Data were collected from the population of trauma patients admitted to Niguarda hospital in Milan from January to June 2021. RStudio and Excel were used for data analysis. For each triage tool performance measures, Receiver Operating Characteristics (ROC) curves, and overtriage and undertriage rates were obtained. A total of 1439 injured patients admitted through 118 pre-hospital Emergency Medical Services (EMS) were included in the study. The ACS-COT triage tool showed a good accuracy but an excessive overtriage rate (59%). The TRENAU triage tool had a moderately good accuracy and a low overtriage rate (23%) while maintaining an acceptable undertriage rate (3.9%). The TRENAU triage tool proved to be efficient in optimizing the use of resources dedicated to trauma care while resulting safe for the injured patient. In a modern trauma system such as Lombardy's it would be more appropriate to adopt the TRENAU score over the ACS-COT field triage decision scheme.


Assuntos
Serviços Médicos de Emergência , Triagem , Serviço Hospitalar de Emergência , Hospitais , Humanos , Estudos Prospectivos , Centros de Traumatologia , Triagem/métodos
4.
Int J Mol Sci ; 22(22)2021 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-34830353

RESUMO

The osmodiuretic agent Mannitol exerts cardioprotection against ischemia and reperfusion (I/R) injury when applied as a pre- and/or postconditioning stimulus. Previously, we demonstrated that these properties are mediated via the activation of mitochondrial ATP-sensitive potassium (mKATP) channels. However, considering Mannitol remains in the extracellular compartment, the question arises as to which receptor and intracellular signaling cascades are involved in myocardial protection by the osmodiuretic substance. Protein kinase B (Akt) and G (PKG), as part of the reperfusion injury salvage kinase (RISK) and/or endothelial nitric oxide (eNOS)/PKG pathway, are two well-investigated intracellular targets conferring myocardial protection upstream of mitochondrial potassium channels. Adenosine receptor subtypes have been shown to trigger different cardioprotective pathways, for example, the reperfusion injury. Further, Mannitol induces an increased activation of the adenosine 1 receptor (A1R) in renal cells conferring its nephroprotective properties. Therefore, we investigated whether (1) Akt and PKG are possible signaling targets involved in Mannitol-induced conditioning upstream of the mKATP channel and/or whether (2) cardioprotection by Mannitol is mediated via activation of the A1R. All experiments were performed on male Wistar rats in vitro employing the Langendorff isolated heart perfusion technique with infarct size determination as the primary endpoint. To unravel possible protein kinase activation, Mannitol was applied in combination with the Akt (MK2206) or PKG (KT5823) inhibitor. In further groups, an A1R blocker (DPCPX) was given with or without Mannitol. Preconditioning with Mannitol (Man) significantly reduced the infarct size compared to the control group. Co-administration of the A1R blocker DPXPC fully abolished myocardial protection of Mannitol. Interestingly and in contrast to the initial hypothesis, neither administration of the Akt nor the PKG blocker had any impact on the cardioprotective properties of Mannitol-induced preconditioning. These results are quite unexpected and show that the protein kinases Akt and PKG-as possible targets of known protective signaling cascades-are not involved in Mannitol-induced preconditioning. However, the cardioprotective effects of Mannitol are mediated via the A1R.


Assuntos
Proteínas Quinases Dependentes de GMP Cíclico/genética , Manitol/farmacologia , Proteínas Proto-Oncogênicas c-akt/genética , Receptor A1 de Adenosina/genética , Traumatismo por Reperfusão/tratamento farmacológico , Animais , Carbazóis/farmacologia , Proteínas Quinases Dependentes de GMP Cíclico/antagonistas & inibidores , Coração/efeitos dos fármacos , Coração/fisiopatologia , Compostos Heterocíclicos com 3 Anéis/farmacologia , Humanos , Precondicionamento Isquêmico Miocárdico , Canais KATP/antagonistas & inibidores , Rim/efeitos dos fármacos , Rim/patologia , Traumatismo por Reperfusão Miocárdica/tratamento farmacológico , Traumatismo por Reperfusão Miocárdica/genética , Traumatismo por Reperfusão Miocárdica/patologia , Miocárdio/metabolismo , Miocárdio/patologia , Óxido Nítrico Sintase Tipo III/genética , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Ratos , Receptor A1 de Adenosina/efeitos dos fármacos , Traumatismo por Reperfusão/genética , Traumatismo por Reperfusão/patologia , Transdução de Sinais/efeitos dos fármacos , Xantinas/farmacologia
5.
Updates Surg ; 73(1): 331-337, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32779110

RESUMO

PURPOSE: The Extra-Peritoneal Pelvic Packing (EPP) is a procedure used in emergency conditions to control pelvic hemorrhage. This procedure can be performed in Emergency Room (ER) if the patient is too unstable to be transported into the operating room (OR), with a possible increased risk of infections linked to a less sterile environment. METHODS: All patients who underwent EPP from 2009 to 2018 were selected from the trauma registry. The patients were divided into two groups according to where EPP was performed (ER or OR). A Propensity Score Matching was realized. EPP was removed in all patients in the OR after obtaining hemodynamic stabilization within 24-48 h and surgical pads were sent to the laboratory for microbiological analysis. RESULTS: Eighty-four patients underwent EPP during the period of the study. After PSM, 26 couples of patients were selected. No differences were observed between the two groups in the development of pelvic infection. Patients managed in OR showed a higher rate of associated abdominal injuries (p = 0.027) and an increasing need for external fixation (p = 0,005) as well as an increased proportion of laparotomies (p = 0.023), orthopedic interventions (p = 0.005) and a higher systolic blood pressure on admission (p = 0.003). CONCLUSIONS: The EPP is a safe procedure, even when performed out of OR. The EPP in ER allows an earlier control of bleeding in patients in extremis. To minimize the risk of infection, EPP should be removed early, as soon as hemodynamics have been stabilized.


Assuntos
Serviço Hospitalar de Emergência , Fixação de Fratura/efeitos adversos , Fixação de Fratura/métodos , Fraturas Ósseas/cirurgia , Hemorragia/prevenção & controle , Ossos Pélvicos/lesões , Infecção da Ferida Cirúrgica/prevenção & controle , Adulto , Idoso , Feminino , Fraturas Ósseas/complicações , Fraturas Ósseas/fisiopatologia , Hemodinâmica , Hemorragia/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Pontuação de Propensão , Segurança
6.
J Periodontal Res ; 53(6): 992-998, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30284742

RESUMO

BACKGROUND AND OBJECTIVE: Periodontitis in one of the most prevalent dental diseases. Despite numerous studies have investigated its aetiopathogenetic factors, few works have focused on its genetic predisposition and most of them took into account only candidate genes. Therefore, we conducted a Genome Wide Association Study in an Italian isolated population aimed at uncovering genetic variants that predispose to this disorder. METHODS: Diagnosis of chronic periodontitis was made following the criteria of the American Academy of Periodontology. Patients with chronic periodontitis were grouped into different categories: slight, severe, localized and generalized. A control group composed by people without signs of periodontitis or gingivitis was defined. DNA was genotyped using 370k Illumina chips. Linear mixed model regression was used to test the association between each single nucleotide polymorphism (SNP) (independent variable) and the periodontitis status (dependent variable), controlling for confounders sex, age and smoking. The genomic kinship matrix was also used as random effect. RESULTS: Four SNPs on the gene EFCAB4B resulted significantly associated to localized periodontitis (P < 5 × 10-8 ), with the best hit on the rs242016 SNP (P = 1.5 × 10-8 ). CONCLUSION: We have identified a novel significant association between the EFCAB4B gene and localized periodontitis. These results open a new perspective in the understanding of genetic factors contributing to this common disorder.


Assuntos
Proteínas de Ligação ao Cálcio/genética , Periodontite Crônica/genética , Predisposição Genética para Doença/genética , Estudo de Associação Genômica Ampla , Polimorfismo de Nucleotídeo Único/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , DNA/genética , Feminino , Genótipo , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Adulto Jovem
9.
Caries Res ; 50(6): 589-594, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27846636

RESUMO

BACKGROUND: The DEFB1 gene, encoding for the constitutively expressed human ß-defensin 1 (hBD1) antimicrobial peptide is a potential candidate when studying genetic susceptibility to caries. DEFB1 genetic variations have been reported as contributing to hBD1 production impairment, leading to a greater susceptibility to be infected by oral pathogens, also leading to periodontitis. METHODS: We analysed 5 DEFB1 polymorphisms, namely 3 functional single-nucleotide polymorphisms (SNPs) at the 5'-untranslated region (UTR), -52G>A (rs1799946), -44C>G (rs1800972), and -20G>A (rs11362), 2 SNPs at the 3'-UTR, c*5G>A (rs1047031) and c*87A>G (rs1800971) SNP located in potential miRNA binding sites, looking for possible correlations with the risk to develop caries in 654 adult subjects from isolated populations of north-eastern Italy. Dental caries prevalence was evaluated with the DMFT (decayed, missing, filled teeth) index, calculated after an accurate oral examination. DEFB1 SNP genotyping was performed with an Illumina 370k high-density SNP array. RESULTS: Two DEFB1 SNPs were significantly associated with the DMFT index: the strongest association emerged from rs11362 SNP (p = 0.008). In particular G/G homozygous individuals showed a higher DMFT index compared to both G/A heterozygous and A/A homozygous individuals; rs1799946 SNP was also significantly associated with DMFT (p = 0.030), and individuals homozygous for the T allele had a higher DMFT value compared to heterozygous C/T and homozygous C/C individuals. CONCLUSIONS: Our study replicated, on a larger number of individuals, previous findings showing the association between two 5'-UTR SNPs in the DEFB1 gene and DMFT, suggesting that these polymorphisms could be considered as potential markers for assessing the risk to develop caries.


Assuntos
Suscetibilidade à Cárie Dentária/genética , Cárie Dentária/genética , Cárie Dentária/imunologia , Imunidade Inata/genética , beta-Defensinas/genética , Adulto , Alelos , Índice CPO , Cárie Dentária/epidemiologia , Feminino , Marcadores Genéticos , Genótipo , Heterozigoto , Homozigoto , Humanos , Itália/epidemiologia , Masculino , MicroRNAs/genética , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Prevalência , Saliva , beta-Defensinas/sangue
10.
World J Emerg Surg ; 11: 25, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27307785

RESUMO

Acute calculus cholecystitis is a very common disease with several area of uncertainty. The World Society of Emergency Surgery developed extensive guidelines in order to cover grey areas. The diagnostic criteria, the antimicrobial therapy, the evaluation of associated common bile duct stones, the identification of "high risk" patients, the surgical timing, the type of surgery, and the alternatives to surgery are discussed. Moreover the algorithm is proposed: as soon as diagnosis is made and after the evaluation of choledocholitiasis risk, laparoscopic cholecystectomy should be offered to all patients exception of those with high risk of morbidity or mortality. These Guidelines must be considered as an adjunctive tool for decision but they are not substitute of the clinical judgement for the individual patient.

11.
Acta Anaesthesiol Scand ; 57(7): 929-35, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23701337

RESUMO

BACKGROUND: Early recognition of hypovolaemia in trauma patients is very important. However, the most often used clinical signs, such as hypotension and tachycardia, lack specificity and sensitivity. METHODS: We propose a non-invasive index of hypovolaemia, the heart to arm time (iHAT), based on a modified pulse transit time indexed to heart rate. Pulse transit time is the sum of pre-ejection period and vascular transit time. Following pre-load reductions due to hypovolaemia, ventricular diastolic filling time increases causing an increase in pre-ejection-period, pulse transit time, and hence iHAT. One hundred and four consecutive patients with suspected major trauma were enrolled. The primary aim was to evaluate the use of the iHAT for detecting haemorrhage in major trauma. The secondary end point was to compare the specificity and sensitivity of iHAT compared to commonly used indexes. RESULTS: iHAT was calculated in 84 subjects, 11 of whom were haemorrhagic. iHAT discriminated haemorrhagic from non-haemorrhagic group (46.8% vs. 66.9%, P < 0.0001). The cut-off for iHAT with the best compromise between sensitivity (90.9%) and specificity (100%) was reached at the 58.78% level. Comparing haemorrhagic and non-haemorrhagic patients, the area under the ROC curve was 0.952 for iHAT, 0.835 for heart rate, and 0.911 for systolic blood pressure, showing no significant differences. CONCLUSIONS: iHAT is a non-invasive index that can identify haemorrhage in trauma patients with high sensitivity and specificity. These data should be considered as an exploration, but any conclusion should be validated in a new set of consecutive patients.


Assuntos
Braço/irrigação sanguínea , Técnicas de Diagnóstico Cardiovascular , Serviços Médicos de Emergência/métodos , Frequência Cardíaca , Hemorragia/diagnóstico , Pulso Arterial , Ferimentos e Lesões/complicações , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Algoritmos , Área Sob a Curva , Feminino , Hemorragia/etiologia , Hemorragia/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Curva ROC , Sensibilidade e Especificidade , Choque/diagnóstico , Choque/etiologia , Choque/prevenção & controle , Fatores de Tempo , Procedimentos Desnecessários , Ferimentos e Lesões/fisiopatologia , Adulto Jovem
12.
Eur J Oral Sci ; 119(3): 241-5, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21564319

RESUMO

The aim of this study was to measure the contraction stress of three flowable resin composites and to correlate the stress with the elastic modulus and the degree of conversion. One low-shrinkage (Venus Diamond Flow) and two conventional (Tetric EvoFlow and X-Flow) flowable composites were polymerized for 40s with a light-emitting diode (LED) curing unit. Contraction force was continuously recorded for 300s using a stress-analyser, and stress values were calculated at 40s and at 300s. The maximum stress rate was also calculated for each specimen. The elastic modulus of each composite was assayed using a biaxial flexural test, and degree of conversion was analysed with Raman spectroscopy. X-Flow exhibited higher stress values than the other tested materials. Venus Diamond Flow showed the lowest stress values at 40s and at 300s, and the lowest maximum stress rate. Stress values were correlated with elastic modulus but not with degree of conversion, which was comparable among all tested materials.


Assuntos
Resinas Compostas/química , Módulo de Elasticidade , Análise do Estresse Dentário , Cura Luminosa de Adesivos Dentários , Teste de Materiais , Maleabilidade , Estresse Mecânico , Viscosidade
13.
Minerva Anestesiol ; 77(4): 457-62, 2011 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21483390

RESUMO

BACKGROUND: The majority of intensive care physicians recognize the clinical significance of intra-abdominal hypertension on the outcome of critically ill patients. Abdominal compartment syndrome (ACS) is defined as an intra-abdominal pressure (IAP) >20 mmHg with ongoing organ failure. However, there is no consensus regarding the indications for surgical decompression. METHODS: A review of personal data and the English literature from 1989 to 2010 focusing on surgical management of ACS. RESULTS: Opening the abdomen is the most effective method to reduce IAP and is the treatment of choice for ACS when IAP is constantly higher than 30 mmHg with ongoing organ failure refractory to medical therapy. A vertical midline incision is the most popular method of surgical decompression, but bilateral subcostal incisions may be indicated in certain conditions. Surgical decompression always obtains a significant decrease in the IAP with physiological improvement, but the effects on organ function are controversial. Negative pressure devices are the most effective for temporary abdominal closure with a higher rate of primary fascial closure and lower risk of fistulas. When primary fascial closure is not feasible, a planned ventral hernia and spontaneous granulation with or without biologic mesh are the preferred methods for the reconstruction of abdominal wall integrity. CONCLUSION: Modern surgical techniques for opening the abdomen in patients with ACS refractory to medical therapy result in physiologic improvement with less treatment-related complications, but recuperation of organ dysfunction is variable.


Assuntos
Abdome/cirurgia , Síndromes Compartimentais/cirurgia , Descompressão Cirúrgica/métodos , Abdome/patologia , Cuidados Críticos , Humanos , Hipertensão/etiologia , Risco , Técnicas de Fechamento de Ferimentos
14.
Eur J Oral Sci ; 118(3): 304-10, 2010 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20572866

RESUMO

During the curing reaction, the monomers of dentine bonding systems should cross-link sufficiently to strengthen an adhesive so that it is clinically reliable. This study evaluated how different storage conditions (air vs. water storage) affect the elastic modulus (E-modulus) and degree of conversion (DC) of a three-step etch-and-rinse adhesive and a two-step self-etch adhesive. The biaxial flexural test and Raman microscopy were performed on resin disks made from the bonding agents Adper Scotchbond Multi-Purpose (SBMP; 3M ESPE) and Clearfil Protect Bond (CPB; Kuraray). The measurements were repeated after storage in either air or water for 15 and 30 min and for 1, 24, and 72 h. At time 0, the E-modulus was not affected by the adhesive system, whilst the degree of cure of CPB was higher than that of SBMP. Air storage increased the E-modulus at each ageing interval. Storage in water increased the E-modulus until it reached a maximum at 24 h, after which it decreased significantly at 72 h. No linear correlation between the percentage DC and E-modulus of the two adhesives was found when stored in water. The results of this study indicate that the mechanical properties and polymerization kinetics of SBMP and CPB are affected by storage time and medium.


Assuntos
Adesivos Dentinários/química , Ar , Fenômenos Químicos , Módulo de Elasticidade , Humanos , Teste de Materiais , Processos Fotoquímicos , Maleabilidade , Polímeros/química , Cimentos de Resina/química , Análise Espectral Raman , Estresse Mecânico , Propriedades de Superfície , Fatores de Tempo , Água/química
15.
Dent Mater ; 25(9): 1178-85, 2009 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-19570569

RESUMO

OBJECTIVES: To examine the degree of conversion (DC) of the adhesive interfaces created by Filtek Silorane Adhesive and Clearfil SE Bond using micro-Raman spectroscopy. METHODS: The adhesives were applied on human dentin in accordance with manufacturer's instructions. Specimens were cut to expose the bonded interfaces to the micro-Raman beam (Ranishaw InVia; laser wl 785 nm). Raman spectra were collected along the dentin/self-etching primer/adhesive interface at 1 microm intervals. The relative intensities of bands associated with mineral (P-O functional group at 960 cm(-1)) and adhesive (C-C-O group at 605 cm(-1)) components within the bonded interface were used to detect monomer penetration into the dentin matrix and to calculate the degree of conversion (C=C at 1640 cm(-1) as reaction peak, C-C-O at 605 cm(-1) as reference peak). Data were statistically analyzed with two-way ANOVA. RESULTS: DC of Filtek Silorane Adhesive was 69+/-7% in the adhesive layer, increasing (p<0.05) to 93+/-5% in the primer and 92+/-9% in the hybrid layer. Clearfil SE Bond showed a DC of 83+/-3% in the hybrid and 85+/-3% in the adhesive layer. Thus, Filtek Silorane Adhesive showed a higher DC than Clearfil SE Bond in the hybrid layer (p<0.05), but a lower DC in the adhesive (p<0.05). SIGNIFICANCE: As high DC is a fundamental pre-requisite for the stability of the bond over time, this study supports the hypothesis that optimal stability of Filtek Silorane Adhesive can be obtained. However, further research is needed to investigate the mechanical properties of the hybrid layer created by Filtek Silorane Adhesive and its long-term stability.


Assuntos
Permeabilidade da Dentina , Adesivos Dentinários , Cura Luminosa de Adesivos Dentários , Cimentos de Resina , Análise do Estresse Dentário , Adesivos Dentinários/efeitos da radiação , Dureza , Humanos , Teste de Materiais , Dente Molar , Transição de Fase , Cimentos de Resina/efeitos da radiação , Resinas de Silorano , Análise Espectral Raman
16.
Eur J Oral Sci ; 117(4): 463-9, 2009 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19627360

RESUMO

Suboptimally polymerized monomers may be responsible for the reduced material properties of simplified adhesives and their inherent bonded interface instability. This study was performed to determine the degree of cure within the hybrid layers produced by three one-step self-etch adhesives in situ using Raman microspectroscopy and to investigate nanoleakage expression. Dentin disks were bonded with AdheSE One, Adper Prompt L-Pop, or iBond. Composite layers of 2-mm thickness were built up in bulk on the polymerized adhesive surfaces and then the adhesive-dentin interfaces were exposed to a micro-Raman beam. Adhesive penetration was calculated using the relative intensities of bands associated with mineral and adhesive, and the degree of conversion (DC) was evaluated. Interfacial nanoleakage expression was evaluated on the same specimens. The DC values for the tested adhesives were found to increase in the following order: AdheSE One (48 +/- 16%) < Adper Prompt L-Pop (83 +/- 2%) = iBond (90 +/- 6%; P < 0.05). AdheSE One showed greater nanoleakage expression than iBond or Adper Prompt L-Pop. Increased nanoleakage expression was associated with AdheSE One that showed the lowest DC. This suggests that a low DC may affect the quality and the long-term stability of the adhesive interface owing to the elution of unreacted monomers forming a porous and highly permeable hybrid layer.


Assuntos
Infiltração Dentária/classificação , Adesivos Dentinários/química , Resinas Acrílicas/química , Resinas Compostas/química , Colagem Dentária , Materiais Dentários/química , Dentina/ultraestrutura , Humanos , Teste de Materiais , Microespectrofotometria , Permeabilidade , Polímeros/química , Porosidade , Cimentos de Resina/química , Análise Espectral Raman , Propriedades de Superfície
17.
Minerva Anestesiol ; 74(6): 303-6, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18500203

RESUMO

An epidemiologic evaluation of trauma-related deaths in trauma centers reveals that the majority of patients die within 6 hours from exsanguination, whereas secondary brain injuries predominate between 6 and 24 hours. Late deaths remain attributable to sepsis and pulmonary embolism,1-3 while early deaths are due in part to multiple bleeding injuries or to a set of complex and untreatable injuries, mainly of the liver and pelvis. Before trauma systems existed, these patients died at the scene of the trauma, whereas since the establishment of the trauma system, they die in emergency or operating rooms. Another subset of early deaths result from severe bleeding injuries, which could be prevented if recognized early. For instance, if a 70 kg adult had a blood volume of 70 mL/kg (5 L), hypotension (systolic blood pressure [SBP]<90 mmHg) would usually occur after a one third-loss of blood volume, and death would follow with a 50% loss. A patient bleeding at a rate of 25 mL/min will become hypotensive within one hour and die within two hours, while a patient bleeding at a rate of 100 mL/min will be hypotensive within 15 minutes and die within 30 minutes. These considerations indicate a narrow window of opportunity for targeting fluid resuscitation. Moreover, increases in blood pressure before surgical hemostasis have been shown to disrupt clotting and increase bleeding, a fact that has been confirmed by a number of animal and human studies on uncontrolled hemorrhage. Furthermore, oxygen must be delivered to vital organs (brain, heart) to prevent death during hemorrhage. In summary, several constraints account for the differences in fluid use, timing of infusions, and determinations of whether to administer fluids at all.


Assuntos
Hidratação/estatística & dados numéricos , Hidratação/normas , Ressuscitação , Ferimentos e Lesões/terapia , Humanos
18.
Dent Mater ; 24(9): 1194-200, 2008 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-18342363

RESUMO

OBJECTIVES: To evaluate the degree of conversion of five experimental adhesive systems in relation to their hydrophilicity. The resin blends ranged from hydrophobic to hydrophilic and were tested as neat bonding agents, or solvated with increasing percentages of ethanol. The hypothesis tested was that extent of polymerization of resin blends is affected by resin hydrophilicity, solvent concentrations or time of polymerization. METHODS: Five light-curing versions of neat experimental resin blends were submitted to investigation: (1) 70% E-BisADM, 28.75% TEGDMA; (2) 70% BisGMA, 28.7% TEGDMA; (3) 70% BisGMA, 28.7% HEMA; (4) 40% BisGMA, 30% TCDM, and 28.75% TEGDMA; (5) 40% BisGMA, 30% BisMP, and 28.75% HEMA. All blends included 1% EDMAB and 0.25% CQ. Ethanol in different weight percentages (A: 0%, B: 30%, C: 50%, D: 70% and E: 90%) was added to these resin blends simulating different formulation of adhesives. A differential scanning calorimeter was used to measure the degree of conversion of resin blends as a function of resin hydrophilicity, solvent concentration and time of curing. Data were analyzed with three-way ANOVA and Tukey's post hoc test. RESULTS: Exotherms showed that degree of conversion was influenced by the hydrophilicity of the blends resin (p<.05), percentage of ethanol dilution (p<.05) and time of curing (p<.05). 30% ethanol dilution increased degree of conversion compared to neat compounds irrespective to resin type and curing time, showing the highest degree of conversion values of the study design. SIGNIFICANCE: This study supports the hypothesis that high ethanol percentages (>50mass%) may compromise extent of polymerization kinetics of dental adhesives.


Assuntos
Resinas Compostas/química , Materiais Dentários/química , Etanol/química , Solventes/química , Ácido 4-Aminobenzoico/química , Bis-Fenol A-Glicidil Metacrilato/química , Varredura Diferencial de Calorimetria , Humanos , Interações Hidrofóbicas e Hidrofílicas , Teste de Materiais , Metacrilatos/química , Polietilenoglicóis/química , Polímeros/química , Ácidos Polimetacrílicos/química , Temperatura , Terpenos/química , Fatores de Tempo , Água/química , Molhabilidade , para-Aminobenzoatos
19.
Minerva Anestesiol ; 74(1-2): 11-5, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18216763

RESUMO

BACKGROUND: The aim of this study was to prove the existence of a direct relationship between the comprehensive strategy of trauma management and an enhancement in outcome. Tests were carried out on the impact of the Niguarda Trauma Team System on mortality rates due to severe trauma. METHODS: The epidemiological data was retrospectively reviewed along with, the severity scores: Abbreviated Injury Scale (AIS), Injury Severity Score (ISS), Revised Trauma Score (RTS), Probability of survival (Ps) and the outcome of severe trauma admitted to Niguarda hospital between October 2002 and September 2005. All data were collected from the Trauma Registry of the Niguarda Hospital. Two subsequent periods of 20 and 16 months were compared. RESULTS: Nine hundred forty-two severe traumas (94.05% blunt trauma) were recorded with an overtriage rate of 36.09%. Most patients were admitted for bone and muscular injuries (52.22%). Excluding the patients who were overtriaged, there were 129 patients who died. Comparing the two periods, the Authors observed a significant reduction in mortality from 22.56% to 19.75%, mainly related to a decrease in early mortality due to hemodynamic instability. Central nervous system injury was the main cause of death (65%). Average hospital stay significantly decreased from 17.01+/-12.07 days to 14.97+/-10.34 days. CONCLUSION: Introducing a comprehensive strategy of severe trauma management, the Niguarda Trauma Team System had a significant impact on mortality rates and hospital stay.


Assuntos
Ferimentos e Lesões/mortalidade , Ferimentos e Lesões/terapia , Adulto , Feminino , Humanos , Escala de Gravidade do Ferimento , Masculino , Equipe de Assistência ao Paciente , Estudos Retrospectivos , Fatores de Tempo
20.
Ophthalmology ; 114(5): 860-5, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17467525

RESUMO

PURPOSE: To investigate the efficacy of a new surgical and rehabilitative procedure designed to improve vision in patients with central scotoma due to macular diseases. DESIGN: Case series of 40 consecutive surgical and rehabilitative procedures. PARTICIPANTS: Forty eyes of 35 consecutive patients with a stable central scotoma due to macular disease underwent phacoemulsification cataract surgery with the implant of the IOL-Vip System. METHODS: The IOL-Vip System consists of a biconcave high minus-power intraocular lens (IOL) in the capsular bag and a biconvex high plus-power IOL in the anterior chamber, reproducing an intraocular Galilean telescope with x1.3 magnification for distance. Selection of the candidate patients was carried out by means of a low-vision diagnostic and rehabilitative program (IOL-Vip software) that evaluates the residual visual function of patients and prognosis for visual improvement based on simulation of the postoperative condition. The software also designs the rehabilitation strategies based on preoperative and postoperative training of the preferred retinal locus. MAIN OUTCOME MEASURES: Best-corrected visual acuity (BCVA), evaluated by means of the Early Treatment Diabetic Retinopathy Study charts and procedure; reading magnification; and reading distance. RESULTS: All patients showed an improvement of visual acuity (VA) due to the surgical and rehabilitative procedure, confirming or exceeding the preoperative expected results. Mean postoperative BCVA was 0.77 (logarithm of the minimum angle of resolution), compared with 1.28 preoperatively. The mean postoperative best reading magnification gain was x6.2, and the mean postoperative reading distance gain was 7.66 cm. No cases of intraoperative or postoperative complications were detected, and the implant was subjectively well tolerated in both monocular and binocular procedures. CONCLUSION: In this pilot study, the IOL-Vip System was shown to be effective and apparently well tolerated in improving the vision of patients with macular disease. Best-corrected VA, reading magnification, and reading distance improved in all cases of this low-vision patient series.


Assuntos
Câmara Anterior/cirurgia , Cápsula do Cristalino/cirurgia , Implante de Lente Intraocular , Lentes Intraoculares , Degeneração Macular/reabilitação , Baixa Visão/reabilitação , Idoso , Idoso de 80 Anos ou mais , Contagem de Células , Endotélio Corneano/patologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Facoemulsificação , Projetos Piloto , Complicações Pós-Operatórias , Resultado do Tratamento , Acuidade Visual
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