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Total laparoscopic hysterectomy: retrospective analysis of 262 cases
Nogueira-Silva, C; Santos-Ribeiro, S; Barata, S; Alho, C; Osório, F; Calhaz-Jorge, JINTRODUCTION: Hysterectomy is one of the most common gynecological procedures and may be performed either by vaginal approach, laparotomy or laparoscopy. Although total laparoscopic hysterectomy has multiple advantages, conflicting major complication rates have been previously reported. OBJECTIVES: To describe our experience performing TLH and to evaluate complication rates. MATERIAL AND METHODS: A retrospectiv...
Carcinóide estrumal associado a teratoma quístico maduro do ovário: um caso clí...
Osório, F; Franco, A; Pedro, A; Faustino, F; Nazaré, ADermoid ovarian cysts are the most common germ-cells tumours of the ovary, but strumal carcinoid transformation is rare. The authors report the case of an asymptomatic 20 year-old woman, referred to the gynaecological outpatient clinic, because of the ultrasound finding of an adnexal cyst. On physical examination a right adnexal mass was identified. A repeat ultrasound revealed an ovarian mass measuring 11.5cm,...
Magnetopolaron effects on the intradonor 1s-2p+ transition energies in a GaAs -...
Osório,F. A. P.; Machado,Paulo C. M.; Borges,A. N.In this work we present a calculation of the intradonor 1s-2p+ transition energies for an impurity donor present in a GaAs-AlGaAs Double Quantum Well structure as a function of an applied external magnetic field. In our calculation the impurity energy levels were obtained from a variational method by choosing a Gaussian trial wave function, and the energy corrections due to the polaronic effect were included by...
The effects of the plasmon-LO phonon interaction on the critical densities of R...
Machado,P. C. M.; Osório,F. A. P.; Borges,A. N.In this work we have studied the electron LO phonon interaction on the pair-correlation function g(x) and its dependence on the electronic density for a GaAs-AlGaAs rectangular quantum wire within the random-phase approximation (RPA). We assumed two different values of the wire width. As negative non-physical results are found for lower electronic densities and small interparticle separations in the RPA approac...
Study of the RPA pair-correlation function in GaAs-AlGaAs parabolic quantum wel...
Cunha,J. B. B. da; Cunha,J. F. R. da; Machado,P. C. M.; Osório,F. A. P.; Borges,A. N.The ground state intrasubband pair-correlation function for a quasi-one-dimensional electron gas confined in a GaAs-Al xGa1-xAs parabolic quantum well wire within the Random-Phase Approximation (RPA) is calculated. We have considered two wires with subband energies separation homega = 2:0 meV and homega = 2:5 meV. The dependence of the pair-correlation function on the electronic density was studied and the regi...
Zeeman effect in Cd1-xMn xTe parabolic and half-parabolic quantum wells
Cunha,J. F. R.; Osório,F. A. P.; Borges,A. N.; Souza,M. A. R.We have investigated the electronic structure of Cd1_xMn xTe parabolic quantum wells and half-parabolic quantum wells heterostructures in the envelope function approximation using the k · p method. We have considered an external magnetic field applied in two different configurations: in the plane of the layer and in the growth direction. The confined states have been calculated taking into account the effective...
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