Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 236
Filtrar
1.
J Perianesth Nurs ; 39(1): 10-15, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37855761

RESUMO

Adverse surgical events cause negative patient health outcomes and harm that can often overshadow the safe and effective patient care provided daily by nurses as members of interprofessional healthcare teams. Near misses occur far more frequently than adverse events and are less visible to nurse leaders because patient harm is avoided due to chance, prevention, or mitigation. However, near misses have comparable root causes to adverse events and exhibit the same underlying patterns of failure. Reviewing near misses provides nurses with learning opportunities to identify patient care weaknesses and build appropriate solutions to enhance care. As the operating room is one of the most complex work settings in healthcare, identifying potential weaknesses or sources for errors is vital to reduce healthcare-associated risks for patients and staff. The purpose of this manuscript is to educate, inform, and stimulate critical thinking by discussing perioperative near miss case studies and the underlying factors that lead to errors. Our authors discuss 15 near miss case studies occurring across the perioperative patient experience of care and discuss barriers to near miss reporting. Nurse leaders can use our case studies to stimulate discussion among perioperative and perianesthesia nurses in their hospitals to inform comprehensive risk reduction programs.


Assuntos
Near Miss , Gestão de Riscos , Humanos , Segurança do Paciente , Salas Cirúrgicas , Acidentes , Erros Médicos/prevenção & controle
2.
J Dermatolog Treat ; 33(7): 3022-3027, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35775704

RESUMO

BACKGROUND: Photodynamic therapy (PDT) is an effective treatment for actinic keratosis (AK). However, pain and hypertension are important side effects of conventional PDT (c-PDT). Several studies have demonstrated that daylight PDT (dl-PDT) is less painful while being as effective as c-PDT. OBJECTIVE: To observe the effect of c-PDT and dl-PDT on different hemodynamic parameters (systolic blood pressure and diastolic blood pressure, pulse rate, and peripheral oxygen saturation). METHODS: Fifty patients with AK on the head were enrolled into this prospective, randomized, controlled study and treated with c-PDT or dl-PDT in a 1:1 ratio. Hemodynamic parameters were measured at four different time points during treatment. Pain was quantified using a visual analog scale. AK was counted before treatment and after one month. RESULTS: C-PDT is associated with significantly more pain, a significant increase in blood pressure and a higher rate of patients with grade 3 hypertension. Whereas dl-PDT is almost painless and does not lead to any changes in hemodynamic parameters. For both treatments, a similar lesion response rate was found after one month. CONCLUSIONS: dl-PDT has a better tolerability while being as effective as c-PDT and therefore may be the more favorable treatment option in certain patient groups.


Assuntos
Hipertensão , Ceratose Actínica , Fotoquimioterapia , Humanos , Ceratose Actínica/tratamento farmacológico , Fotoquimioterapia/efeitos adversos , Ácido Aminolevulínico/uso terapêutico , Fármacos Fotossensibilizantes/uso terapêutico , Estudos Prospectivos , Resultado do Tratamento , Dor/tratamento farmacológico , Dor/etiologia , Hemodinâmica , Hipertensão/tratamento farmacológico , Hipertensão/etiologia
3.
Ann Oncol ; 32(4): 533-541, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33482247

RESUMO

BACKGROUND: In 2004, we started an intergroup randomized trial of adjuvant imatinib versus no further therapy after R0-R1 surgery in localized, high/intermediate-risk gastrointestinal stromal tumors (GIST) patients. Interim analysis results were published in 2015 upon recommendation from an independent data review committee. We report the final outcome of the study. PATIENTS AND METHODS: This was a randomized, open-label, multicenter phase III trial carried out at 112 hospitals in 12 countries. Patients were randomized to 2 years of imatinib, 400 mg daily, or no further therapy after surgery. The primary endpoint was imatinib failure-free survival (IFFS), while relapse-free survival (RFS), relapse-free interval (RFI), overall survival (OS) and toxicity were secondary endpoints. Adjusting for the interim analyses, results on IFFS were assessed on a 4.3% significance level; for the other endpoints, 5% was used. RESULTS: Nine hundred and eight patients were randomized between January 2005 and October 2008: 454 to imatinib and 454 to observation; 835 patients were eligible. With a median follow-up of 9.1 years, 5 (10)-year IFFS was 87% (75%) in the imatinib arm versus 83% (74%) in the control arm [hazard ratio (HR) = 0.87, 95.7% confidence interval (CI) (0.65; 1.15), P = 0.31]; RFS was 70% versus 63% at 5 years and 63% versus 61% at 10 years, [HR = 0.71, 95% CI (0.57; 0.89), P = 0.002]; OS was 93% versus 92% at 5 years and 80% versus 78% at 10 years [HR = 0.88, 95% CI (0.65; 1.21), P = 0.43]. Among 526 patients with high-risk GIST by local pathology, 10-year IFFS and RFS were 69% versus 61%, and 48% versus 43%, respectively. CONCLUSIONS: With 9.1 years of follow-up, a trend toward better long-term IFFS in imatinib-treated patients was observed in the high-risk subgroup. Although the difference was not statistically significant and the surrogacy value of such an endpoint is not validated, this may be seen as supporting the results reported by the Scandinavian/German trial, showing a sustained small but significant long-term OS benefit in high-risk GIST patients treated with 3 years of adjuvant imatinib.


Assuntos
Antineoplásicos , Neoplasias Gastrointestinais , Tumores do Estroma Gastrointestinal , Sarcoma , Antineoplásicos/uso terapêutico , Quimioterapia Adjuvante , Neoplasias Gastrointestinais/tratamento farmacológico , Tumores do Estroma Gastrointestinal/tratamento farmacológico , Humanos , Mesilato de Imatinib/uso terapêutico , Itália , Recidiva Local de Neoplasia/tratamento farmacológico , Sarcoma/tratamento farmacológico
4.
J Eur Acad Dermatol Venereol ; 33(7): 1281-1289, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30811675

RESUMO

BACKGROUND: Risk factors for primary non-melanoma skin cancer (NMSC) in organ transplant recipients (OTR) have been well described. Data for subsequent NMSC and dynamics in their occurrence in OTR are limited. OBJECTIVE: To study long-term risks of primary and subsequent NMSC and associated risk factors in OTR. METHODS: A retrospective single-centre cohort study analysing medical records from a dermato-oncological specialty clinic. RESULTS: Of 464 OTR 110 (23.7%) developed at least one, 73 (15.7%) two and 51 (11%) three NMSC during a median follow-up of 9.6 years. Cumulative incidences at 5, 10 and 15 years were 14.7%, 23.5% and 34.5% for the first and 75.8%, 86.5% and 93.3% for the second. Median time-to-diagnosis declined from 22 years (95% CI 19-25) to 2 years (1-3) and about 1 year (0-2) for the first, second and third NMSC. Risk for subsequent NMSC only partially related to risk factors for the primary NMSC. Histologic type of the first NMSC predicted subtype and time-to-diagnosis of the subsequent NMSC. CONCLUSIONS: A first post-transplant NMSC, particularly a SCC, confers a high risk for subsequent NMSC arising with accelerated dynamics. Risk-adapted dermato-oncologic surveillance is advisable for all OTR.


Assuntos
Carcinoma Basocelular/epidemiologia , Carcinoma de Células Escamosas/epidemiologia , Recidiva Local de Neoplasia/epidemiologia , Segunda Neoplasia Primária/epidemiologia , Transplante de Órgãos , Neoplasias Cutâneas/epidemiologia , Adulto , Carcinoma Basocelular/patologia , Carcinoma de Células Escamosas/patologia , Feminino , Alemanha/epidemiologia , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Segunda Neoplasia Primária/patologia , Período Pós-Operatório , Estudos Retrospectivos , Fatores de Risco , Neoplasias Cutâneas/patologia , Fatores de Tempo , Adulto Jovem
5.
J Chem Phys ; 149(21): 214305, 2018 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-30525727

RESUMO

We present the first quantum mechanical model of the collisional dissipation of the alignment of a gas of symmetric-top molecules (ethane) impulsively induced by a linearly polarized non-resonant laser field. The approach is based on use of the Bloch model and of the Markov and secular approximations in which the effects of collisions are taken into account through the state-to-state rates associated with exchanges among the various rotational states. These rates are constructed using the Energy Corrected Sudden (ECS) approximation with (a few) input parameters obtained independently from fits of the pressure-broadening coefficients of ethane absorption lines. Based on knowledge of the laser pulse characteristics and on these rates, the time-dependent equation driving the evolution of the density matrix during and after the laser pulse is solved and the time dependence of the so-called "alignment factor" is computed. Comparisons with measurements, free of any adjusted parameter, show that the proposed approach leads to good agreement with measurements. The analysis of the ECS state-to-state collisional rates demonstrates that, as in the case of linear molecules, collision-induced changes of the rotational angular momentum orientation are slower than those of its magnitude. This explains why the collisional decay of the permanent component of the alignment is significantly slower than that of the amplitudes of the transient revivals in both experimental and computed results. It is also shown that, since intermolecular forces within C2H6 colliding pairs weakly depend on rotations of the molecules around their C-C bond, the dissipation mechanism of the alignment in pure ethane is close to that involved in linear molecules.

6.
J Chem Phys ; 149(15): 154301, 2018 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-30342447

RESUMO

We present the first theoretical study of collisional dissipation of the alignment of a symmetric-top molecule (ethane gas) impulsively induced by a linearly polarized non-resonant laser field. For this, Classical Molecular Dynamics Simulations (CMDSs) are carried out for an ensemble of C2H6 molecules based on knowledge of the laser-pulse characteristics and on an input intermolecular potential. These provide, for a given gas pressure and initial temperature, the orientations of all molecules at all times from which the alignment factor is directly obtained. Comparisons with measurements show that these CMDSs well predict the permanent alignment induced by the laser pulse and its decay with time but, as expected, fail in generating alignment revivals. However, it is shown that introducing a simple requantization procedure in the CMDS "creates" these revivals and that their predicted dissipation decay agrees very well with measured values. The calculations also confirm that, as for linear molecules, the permanent alignment of ethane decays more slowly than the transient revivals. The influence of the intermolecular potential is studied as well as that of the degree of freedom associated with the molecular rotation around the symmetry axis. This reveals that ethane practically behaves as a linear molecule because the intermolecular potential is only weakly sensitive to rotation around the C-C axis.

7.
Nervenarzt ; 89(5): 524-529, 2018 May.
Artigo em Alemão | MEDLINE | ID: mdl-29327100

RESUMO

As a result of a literature-based expert process, this review provides an overview about the principles of palliative care for people with advanced dementia that are relevant for clinical practice. In particular, the indications, impact and aims of palliative care for advanced dementia are described. Life-prolonging measures and management of symptoms at the end of life are discussed. Furthermore, the overview focuses on the legal basis of decision making.


Assuntos
Demência , Cuidados Paliativos , Tomada de Decisões , Humanos , Cuidados Paliativos/legislação & jurisprudência
8.
Technol Cancer Res Treat ; 16(4): 470-481, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-27422012

RESUMO

OBJECTIVE: The difference in the resonance frequency of water and methylene moieties of lipids quantifies in magnetic resonance spectroscopy the absolute temperature using a predefined calibration curve. The purpose of this study was the investigation of peak evaluation methods and the magnetic resonance spectroscopy sequence (point-resolved spectroscopy) parameter optimization that enables thermometry during deep hyperthermia treatments. MATERIALS AND METHODS: Different Lorentz peak-fitting methods and a peak finding method using singular value decomposition of a Hankel matrix were compared. Phantom measurements on organic substances (mayonnaise and pork) were performed inside the hyperthermia 1.5-T magnetic resonance imaging system for the parameter optimization study. Parameter settings such as voxel size, echo time, and flip angle were varied and investigated. RESULTS: Usually all peak analyzing methods were applicable. Lorentz peak-fitting method in MATLAB proved to be the most stable regardless of the number of fitted peaks, yet the slowest method. The examinations yielded an optimal parameter combination of 8 cm3 voxel volume, 55 millisecond echo time, and a 90° excitation pulse flip angle. CONCLUSION: The Lorentz peak-fitting method in MATLAB was the most reliable peak analyzing method. Measurements in homogeneous and heterogeneous phantoms resulted in optimized parameters for the magnetic resonance spectroscopy sequence for thermometry.


Assuntos
Espectroscopia de Ressonância Magnética/métodos , Animais , Calibragem , Interpretação Estatística de Dados , Hipertermia Induzida , Imagens de Fantasmas , Sus scrofa , Termometria
9.
Strahlenther Onkol ; 192(11): 806-814, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27402389

RESUMO

BACKGROUND AND PURPOSE: Small animal irradiation systems were developed for preclinical evaluation of tumor therapy closely resembling the clinical situation. Mostly only clinical LINACs are available, so protocols for small animal partial body irradiation using a conventional clinical system are essential. This study defines a protocol for conformal brain tumor irradiations in mice. MATERIALS AND METHODS: CT and MRI images were used to demarcate the target volume and organs at risk. Three 6 MV photon beams were planned for a total dose of 10 fractions of 1.8 Gy. The mouse position in a dedicated applicator was verified by an X­ray patient positioning system before each irradiation. Dosimetric verifications (using ionization chambers and films) were performed. Irradiation-induced DNA damage was analyzed to verify the treatment effects on the cellular level. RESULTS: The defined treatment protocol and the applied fractionation scheme were feasible. The in-house developed applicator was suitable for individual positioning at submillimeter accuracy of anesthetized mice during irradiation, altogether performed in less than 10 min. All mice tolerated the treatment well. Measured dose values perfectly matched the nominal values from treatment planning. Cellular response was restricted to the target volume. CONCLUSION: Clinical LINAC-based irradiations of mice offer the potential to treat orthotopic tumors conformably. Especially with respect to lateral penumbra, dedicated small animal irradiation systems exceed the clinical LINAC solution.


Assuntos
Neoplasias Encefálicas/radioterapia , Neoplasias Encefálicas/veterinária , Posicionamento do Paciente/veterinária , Radiocirurgia/veterinária , Planejamento da Radioterapia Assistida por Computador/veterinária , Radioterapia Guiada por Imagem/veterinária , Animais , Neoplasias Encefálicas/diagnóstico por imagem , Linhagem Celular Tumoral , Camundongos , Dosagem Radioterapêutica , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Resultado do Tratamento
10.
Gesundheitswesen ; 78(10): e53-e58, 2016 Oct.
Artigo em Alemão | MEDLINE | ID: mdl-26551850

RESUMO

Aim: Use of statutory health insurance (SHI) data in health services research is increasing steadily and questions of validity are gaining importance. Using gender-specific diagnosis as an example, the aim of this study was to estimate the prevalence of implausible diagnosis and demonstrate an internal validation strategy. Method: The analysis is based on the SHI data from Baden-Württemberg for 2012. Subject of validation are gender-specific outpatient diagnoses that mismatch with the gender of the insured. To uncover this implausibility, it is necessary to clarify whether the diagnosis or the gender is wrong. The validation criteria used were the presence of further gender-specific diagnoses, the presence of gender-specific settlement items, the specialization of the physician in charge and the gender assignment of the first name of the insured. To review the quality of the validation, it was verified if the gender was changed during the following year. Results: Around 5.1% of all diagnoses were gender-specific and there was a mismatch between diagnosis and gender in 0.04% of these cases. All validation criteria were useful to sort out implausibility, whereas the last one was the most effective. Only 14% remained unsolved. From the total of 1 145 insured with implausible gender-specific diagnoses, one year later 128 had a new gender (in the data). 119 of these cases were rightly classified as insured with wrong gender and 9 cases were in the unsolved group. This confirms that the validation works well. Conclusion: Implausibility in SHI data is relatively small and can be solved with appropriate validation criteria. When validating SHI data, it is advisable to question all data used critically, to use multiple validation criteria instead of just one and to abandon the idea that reality and the associated data conform to standardized norms. Keeping these aspects in mind, analysis of SHI data is a good starting point for research in health services.


Assuntos
Confiabilidade dos Dados , Erros de Diagnóstico/prevenção & controle , Erros de Diagnóstico/estatística & dados numéricos , Reembolso de Seguro de Saúde/estatística & dados numéricos , Programas Nacionais de Saúde/estatística & dados numéricos , Garantia da Qualidade dos Cuidados de Saúde/estatística & dados numéricos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Assistência Ambulatorial/estatística & dados numéricos , Feminino , Alemanha , Humanos , Revisão da Utilização de Seguros/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Distribuição por Sexo , Adulto Jovem
11.
Leukemia ; 29(3): 535-47, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25092144

RESUMO

Almost 30% of all acute myeloid leukemias (AML) are associated with an internal tandem duplication (ITD) in the juxtamembrane domain of FMS-like tyrosine kinase 3 receptor (FLT3). Patients with FLT3-ITD mutations tend to have a poor prognosis. MicroRNAs (miRNAs) have a pivotal role in myeloid differentiation and leukemia. MiRNA-155 (MiR-155) was found to be upregulated in FLT3-ITD-associated AMLs. In this study, we discovered that FLT3-ITD signaling induces the oncogenic miR-155. We show in vitro and in vivo that miR-155 expression is regulated by FLT3-ITD downstream targets nuclear factor-κB (p65) and signal transducer and activator of transcription 5 (STAT5). Further, we demonstrate that miR-155 targets the myeloid transcription factor PU.1. Knockdown of miR-155 or overexpression of PU.1 blocks proliferation and induces apoptosis of FLT3-ITD-associated leukemic cells. Our data demonstrate a novel network in which FLT3-ITD signaling induces oncogenic miR-155 by p65 and STAT5 in AML, thereby targeting transcription factor PU.1.


Assuntos
Regulação Leucêmica da Expressão Gênica , Leucemia Mieloide Aguda/genética , MicroRNAs/genética , Proteínas Proto-Oncogênicas/genética , Fator de Transcrição STAT5/genética , Transativadores/genética , Fator de Transcrição RelA/genética , Tirosina Quinase 3 Semelhante a fms/genética , Adolescente , Adulto , Idoso , Animais , Feminino , Humanos , Leucemia Mieloide Aguda/metabolismo , Leucemia Mieloide Aguda/patologia , Masculino , Camundongos , Camundongos Transgênicos , MicroRNAs/antagonistas & inibidores , MicroRNAs/metabolismo , Pessoa de Meia-Idade , Mutação , Células Mieloides/metabolismo , Células Mieloides/patologia , Proteínas Proto-Oncogênicas/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Fator de Transcrição STAT5/metabolismo , Transdução de Sinais , Transativadores/metabolismo , Fator de Transcrição RelA/metabolismo , Tirosina Quinase 3 Semelhante a fms/metabolismo
12.
Ann Oncol ; 25(5): 1018-25, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24585720

RESUMO

BACKGROUND: Initially, unresectable colorectal liver metastases can be resected after response to chemotherapy. While cetuximab has been shown to increase response and resection rates, the survival outcome for this conversion strategy needs further evaluation. PATIENTS AND METHODS: Patients with technically unresectable and/or ≥5 liver metastases were treated with FOLFOX/cetuximab (arm A) or FOLFIRI/cetuximab (arm B) and evaluated with regard to resectability every 2 months. Tumour response and secondary resection data have been reported previously. A final analysis of overall survival (OS) and progression-free survival (PFS) was carried out in December 2012. RESULTS: Between December 2004 and March 2008, 56 patients were randomised to arm A, 55 to arm B. The median OS was 35.7 [95% confidence interval (CI) 27.2-44.2] months [arm A: 35.8 (95% CI 28.1-43.6), arm B: 29.0 (95% CI 16.0-41.9) months, HR 1.03 (95% CI 0.66-1.61), P = 0.9]. The median PFS was 10.8 (95% CI 9.3-12.2) months [arm A: 11.2 (95% CI 7.2-15.3), arm B: 10.5 (95% CI 8.9-12.2) months, HR 1.18 (95% CI 0.79-1.74), P = 0.4]. Patients who underwent R0 resection (n = 36) achieved a better median OS [53.9 (95% CI 35.9-71.9) months] than those who did not [21.9 (95% CI 17.1-26.7) months, P < 0.001]. The median disease-free survival for R0 resected patients was 9.9 (95% CI 5.8-14.0) months, and the 5-year OS rate was 46.2% (95% CI 29.5% to 62.9%). CONCLUSIONS: This study confirms a favourable long-term survival for patients with initially sub-optimal or unresectable colorectal liver metastases who respond to conversion therapy and undergo secondary resection. Both FOLFOX/FOLFIRI plus cetuximab, appear to be appropriate regimens for 'conversion' treatment in patients with K-RAS codon 12/13/61 wild-type tumours. Thus, liver surgery can be considered curative or alternatively as an additional 'line of therapy' in those patients who are not cured. CLINICAL TRIAL NUMBER: NCT00153998, www.clinicaltrials.gov.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Camptotecina/análogos & derivados , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Hepáticas/tratamento farmacológico , Idoso , Anticorpos Monoclonais Humanizados/administração & dosagem , Camptotecina/uso terapêutico , Cetuximab , Neoplasias Colorretais/mortalidade , Neoplasias Colorretais/patologia , Intervalo Livre de Doença , Feminino , Fluoruracila/uso terapêutico , Humanos , Estimativa de Kaplan-Meier , Leucovorina/uso terapêutico , Neoplasias Hepáticas/mortalidade , Neoplasias Hepáticas/secundário , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Compostos Organoplatínicos/uso terapêutico , Modelos de Riscos Proporcionais , Resultado do Tratamento
13.
J Orofac Orthop ; 75(2): 85-95, 2014 Mar.
Artigo em Inglês, Alemão | MEDLINE | ID: mdl-24577016

RESUMO

OBJECTIVES: The goal of the following study was to quantify facial soft-tissue asymmetry in patients with pronounced skeletal malocclusion anomalies before and after orthodontic treatment combined with orthognathic surgery. In addition, the facial attractiveness of these patients was rated by dental specialists and laypersons both before and after treatment based on the three-dimensional (3D) data. PATIENTS AND METHODS: An optical sensor was used to noninvasively capture the 3D facial surface data of 60 adult patients including two groups of 20 patients with skeletal Class II or III anomalies and a control group of another 20 subjects with Class I relationships. Facial surface asymmetries were evaluated immediately before the surgical procedure and 1 year thereafter. In addition, subjective ratings of facial attractiveness were obtained based on a questionnaire from orthodontists, maxillofacial surgeons, and laypersons. RESULTS: No differences in facial soft-tissue asymmetry were observed between the Class II and III patients either pre- or postoperatively, but asymmetry was found to be more pronounced in the skeletal malocclusion groups than in the Class I control group both pre- and postoperatively. The subjective ratings of facial attractiveness by the various rater groups yielded more favorable results for the post- than preoperative patient images, reflecting differences that reached overall statistical significance. CONCLUSION: Quantitative analysis of facial soft-tissue asymmetry and calculating a cutoff value allowed us to distinguish patients with skeletal malocclusion from a control group solely on the basis of asymmetry. Combined regimens of orthodontic treatment and orthognathic surgery go some way in reducing asymmetry toward the levels seen in untreated control subjects, while the asymmetry pattern characteristic of this type of malocclusion will persist. Nevertheless, the asymmetry reduction is noticeable enough to result in more favorable ratings of attractiveness.


Assuntos
Assimetria Facial/patologia , Assimetria Facial/terapia , Imageamento Tridimensional/métodos , Má Oclusão/patologia , Má Oclusão/terapia , Ortodontia Corretiva/métodos , Procedimentos Cirúrgicos Ortognáticos/métodos , Adulto , Terapia Combinada , Assimetria Facial/etiologia , Feminino , Humanos , Masculino , Má Oclusão/complicações , Estudos Retrospectivos , Resultado do Tratamento
14.
J Chem Phys ; 140(6): 064302, 2014 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-24527910

RESUMO

The infrared absorption in the fundamental band of CO gas confined in porous silica xerogel has been recorded at room temperature for pressures between about 5 and 920 hPa using a high resolution Fourier transform spectrometer. The widths of individual lines are determined from fits of measured spectra and compared with ab initio predictions obtained from requantized classical molecular dynamics simulations. Good agreement is obtained from the low pressure regime where the line shapes are governed by molecule-wall collisions to high pressures where the influence of molecule-molecule interactions dominates. These results, together with those obtained with a simple analytical model, indicate that both mechanisms contribute in a practically additive way to the observed linewidths. They also confirm that a single collision of a molecule with a wall changes its rotational state. These results are of interest for the determination of some characteristics of the opened porosity of porous materials through optical soundings.

15.
Br J Cancer ; 109(8): 2286-94, 2013 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-24045656

RESUMO

BACKGROUND: A strong, consistent association between childhood irradiation and subsequent thyroid cancer provides an excellent model for studying radiation carcinogenesis. METHODS: We evaluated gene expression in 63 paired RNA specimens from frozen normal and tumour thyroid tissues with individual iodine-131 (I-131) doses (0.008-8.6 Gy, no unirradiated controls) received from Chernobyl fallout during childhood (Ukrainian-American cohort). Approximately half of these randomly selected samples (32 tumour/normal tissue RNA specimens) were hybridised on 64 whole-genome microarrays (Agilent, 4 × 44 K). Associations between I-131 dose and gene expression were assessed separately in normal and tumour tissues using Kruskal-Wallis and linear trend tests. Of 155 genes significantly associated with I-131 after Bonferroni correction and with ≥2-fold increase per dose category, we selected 95 genes. On the remaining 31 RNA samples these genes were used for validation purposes using qRT-PCR. RESULTS: Expression of eight genes (ABCC3, C1orf9, C6orf62, FGFR1OP2, HEY2, NDOR1, STAT3, and UCP3) in normal tissue and six genes (ANKRD46, CD47, HNRNPH1, NDOR1, SCEL, and SERPINA1) in tumour tissue was significantly associated with I-131. PANTHER/DAVID pathway analyses demonstrated significant over-representation of genes coding for nucleic acid binding in normal and tumour tissues, and for p53, EGF, and FGF signalling pathways in tumour tissue. CONCLUSION: The multistep process of radiation carcinogenesis begins in histologically normal thyroid tissue and may involve dose-dependent gene expression changes.


Assuntos
Acidente Nuclear de Chernobyl , Expressão Gênica/efeitos da radiação , Radioisótopos do Iodo/administração & dosagem , Neoplasias Induzidas por Radiação/etiologia , Neoplasias Induzidas por Radiação/genética , Glândula Tireoide/efeitos da radiação , Neoplasias da Glândula Tireoide/etiologia , Neoplasias da Glândula Tireoide/genética , Adolescente , Adulto , Criança , Feminino , Estudo de Associação Genômica Ampla , Humanos , Masculino , Transcriptoma/efeitos da radiação , Adulto Jovem
16.
J Chem Phys ; 139(2): 024306, 2013 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-23862942

RESUMO

We present comparisons between measurements and ab initio calculations of the dissipation of the nonadiabatic laser-induced alignment in pure CO2 and CO2-He gas mixtures. The experiments were made for pressures between 2 and 20 bars at 295 K by using short non-resonant linearly polarized laser pulses for alignment and probe. The calculations are carried, free of any adjusted parameter, using refined intermolecular potentials and a requantized Classical Molecular Dynamics Simulations approach presented previously but not yet confronted to experiments. The results demonstrate that the model accurately reproduces the decays with time of both the transient revivals and "permanent" component of the alignment. The significant differences observed between the behaviors resulting from CO2-CO2 and CO2-He collisions are also well predicted by the model.

17.
Ann Oncol ; 24(10): 2672-2676, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23868907

RESUMO

BACKGROUND: To determine the activity of radiotherapy in patients with inoperable desmoid-type fibromatosis (DF) a multicenter prospective phase II trial was carried out. MATERIALS AND METHODS: Patients with inoperable progressive disease of primary, recurrent or incompletely resected lesions received a dose of 56 Gy in 28 fractions. Follow-up MRI studies were carried out every 3 months for 2 years and thereafter every 6 months. The primary end point was local control rate at 3 years, estimated by a nonparametric method for interval-censored survival data. Secondary end points were objective tumor response, acute and late toxic effect. RESULTS: Forty-four patients (27 F/17 M) were enrolled from 2001 to 2008. Median age was 39.5 years. Main tumor sites included trunk 15 (34.1%) and extremities 27 (61.3%). Median follow-up was 4.8 years. The 3-year local control rate was 81.5% (90% one-sided confidence interval 74% to 100%). Best overall response during the first 3 years was complete response (CR) 6 (13.6%), partial response (PR) 16 (36.4%), stable disease 18 (40.9%), progressive disease 3 (6.8%) and nonassessable 1 (2.3%). Five patients developed new lesions. After 3 years, the response further improved in three patients: (CR 2, PR 1). Acute grade 3 side-effects were limited to skin, mucosal membranes and pain. Late toxic effect consisted of mild edema in 10 patients. CONCLUSIONS: Moderate dose radiotherapy is an effective treatment of patients with DF. Response after radiation therapy is slow with continuing regression seen even after 3 years.


Assuntos
Fibromatose Agressiva/radioterapia , Recidiva Local de Neoplasia/radioterapia , Adolescente , Adulto , Idoso , Feminino , Fibromatose Agressiva/diagnóstico por imagem , Seguimentos , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Estudos Prospectivos , Radiografia , Análise de Sobrevida , Resultado do Tratamento , Adulto Jovem
18.
Invest New Drugs ; 31(1): 167-74, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22763609

RESUMO

BACKGROUND: This study evaluated efficacy and safety of pemetrexed in patients with refractory soft tissue sarcoma. METHODS: Patients received pemetrexed intravenously at a dose of 500 mg/m² every 21 days until progression or unacceptable toxicity. The primary endpoint was objective tumor response. RESULTS: Fourty-eight of 53 screened patients were included and received a total of 200 cycles (median 2; range 1-30). Median age was 53 years (range, 20-81). The observed toxicity profile was favorable. NCI-CTC hematologic grade 3/4 toxicity consisted of neutropenia in 13 %, anemia in 15 %, and febrile neutropenia in 4 % of patients of patients, respectively. Non-hematologic CTC grade 3/4 toxicity consisted of elevated ASAT/ALAT in 10 %, hyperglycemia in 6 %, infection with or without neutropenia in 6 %, nausea in 2 % and stomatitis in 2 % of patients. No other grade 3 toxicities and no treatment-related toxic deaths were observed. Overall response as defined by RECIST was 5 %, 16 patients experienced stable disease (40 %). The estimated 3- and 6-months progression-free rates were 33.3 % and 14.6 %, respectively. CONCLUSIONS: In patients with refractory STS, pemetrexed is well tolerated and moderately effective. The confirmed objective response rate in STS is low, however, disease stabilizations are seen in a high proportion of patients (ClinicalTrials.gov NCT00427466).


Assuntos
Antineoplásicos/administração & dosagem , Glutamatos/administração & dosagem , Guanina/análogos & derivados , Sarcoma/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/efeitos adversos , Feminino , Glutamatos/efeitos adversos , Guanina/administração & dosagem , Guanina/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Pemetrexede , Adulto Jovem
19.
Invest New Drugs ; 31(3): 661-8, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22832803

RESUMO

Matuzumab is a humanized IgG1 EGFR monoclonal antibody. This phase I study investigated the tolerability, safety and pharmacokinetics (PK) of matuzumab in combination with paclitaxel in patients with EGFR-expressing advanced non-small cell lung cancer (NSCLC). Six dose levels/schedules of matuzumab were explored in combination with paclitaxel. Dose was escalated from 100 mg to 1,600 mg on a modified Fibonacci scheme according to the incidence of dose-limiting toxicity (DLT) over the first two cycles. DLT was assessed in patients who completed the first two treatment cycles or who stopped treatment because of a DLT during those cycles. Patients with non-progressive disease could then continue to receive study treatment for up to 6 months. The safety population comprised 44 patients, with DLT evaluable in 33. The maximum tolerated dose was not reached, with only one DLT reported at the 1,600 mg 3-weekly dose level. The most frequent grade 3/4 adverse events across all cycles were dyspnea (23 %) and neutropenia (11 %). Matuzumab exhibited non-linear PK, with accumulation after escalation and repeated dosing. Tumor growth control was seen in 15/44 (34 %) patients, including 5/9 (56 %) at the 800 mg weekly dose level. Matuzumab combined with paclitaxel was generally well tolerated in patients with advanced NSCLC. There was some evidence of anticancer activity in relation to the matuzumab 800 mg weekly dose.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Adulto , Idoso , Anticorpos Monoclonais Humanizados/administração & dosagem , Anticorpos Monoclonais Humanizados/efeitos adversos , Anticorpos Monoclonais Humanizados/farmacocinética , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Antineoplásicos/farmacocinética , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/farmacocinética , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Receptores ErbB/metabolismo , Feminino , Humanos , Neoplasias Pulmonares/metabolismo , Masculino , Dose Máxima Tolerável , Pessoa de Meia-Idade , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos
20.
Ann Oncol ; 24(4): 878-88, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23152360

RESUMO

In November 2011, the Third European Consensus Conference on Diagnosis and Treatment of Germ-Cell Cancer (GCC) was held in Berlin, Germany. This third conference followed similar meetings in 2003 (Essen, Germany) and 2006 (Amsterdam, The Netherlands) [Schmoll H-J, Souchon R, Krege S et al. European consensus on diagnosis and treatment of germ-cell cancer: a report of the European Germ-Cell Cancer Consensus Group (EGCCCG). Ann Oncol 2004; 15: 1377-1399; Krege S, Beyer J, Souchon R et al. European consensus conference on diagnosis and treatment of germ-cell cancer: a report of the second meeting of the European Germ-Cell Cancer Consensus group (EGCCCG): part I. Eur Urol 2008; 53: 478-496; Krege S, Beyer J, Souchon R et al. European consensus conference on diagnosis and treatment of germ-cell cancer: a report of the second meeting of the European Germ-Cell Cancer Consensus group (EGCCCG): part II. Eur Urol 2008; 53: 497-513]. A panel of 56 of 60 invited GCC experts from all across Europe discussed all aspects on diagnosis and treatment of GCC, with a particular focus on acute and late toxic effects as well as on survivorship issues. The panel consisted of oncologists, urologic surgeons, radiooncologists, pathologists and basic scientists, who are all actively involved in care of GCC patients. Panelists were chosen based on the publication activity in recent years. Before the meeting, panelists were asked to review the literature published since 2006 in 20 major areas concerning all aspects of diagnosis, treatment and follow-up of GCC patients, and to prepare an updated version of the previous recommendations to be discussed at the conference. In addition, ∼50 E-vote questions were drafted and presented at the conference to address the most controversial areas for a poll of expert opinions. Here, we present the main recommendations and controversies of this meeting. The votes of the panelists are added as online supplements.


Assuntos
Neoplasias Embrionárias de Células Germinativas/patologia , Neoplasias Embrionárias de Células Germinativas/terapia , Europa (Continente) , Seguimentos , Humanos , Metástase Neoplásica , Estadiamento de Neoplasias , Neoplasias Embrionárias de Células Germinativas/classificação , Neoplasias Embrionárias de Células Germinativas/diagnóstico , Taxa de Sobrevida
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA