Stefano Barbero

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PURPOSE For many years, poor vascularization of the short rectal stump has been considered the main cause of leakage. The purpose of this study was to evaluate the vascularization of the rectal stump after total mesorectal excision. METHODS We studied the iliac vascularization on 28 volunteers with healthy rectum to have an anatomic basis. Then, we(More)
PURPOSE This article reports on our experience treating vertebral fractures with percutaneous vertebroplasty. A clinical and imaging follow-up designed to identify the early (especially pulmonary embolism of bone cement) and late complications of the technique is proposed. MATERIAL AND METHODS On the basis of the current guidelines, 101 patients were(More)
In this paper we study the action of the Binomial and Invert (interpolated) operators on the set of linear recurrent sequences. We prove that these operators preserve this set, and we determine how they change the characteristic polynomials. We show that these operators, with the aid of two other elementary operators (essentially the left and right shifts),(More)
PURPOSE This study retrospectively analysed the results of biopsies obtained during percutaneous vertebroplasty (PVP) in patients with presumed osteoporotic vertebral compression fractures, with a view to highlighting the importance of coaxial biopsy in determining the aetiology of vertebral fractures and planning subsequent treatment. MATERIALS AND(More)
In this paper we highlight the connection between Ramanujan cubic polynomials (RCPs) and a class of polynomials, the Shanks cubic polynomials (SCPs), which generate cyclic cubic fields. In this way we provide a new characterization for RCPs and we express the zeros of any RCP in explicit form, using trigonometric functions. Moreover , we observe that a(More)
In this paper we study the action of a generalization of the Binomial interpolated operator on the set of linear recurrent sequences. We find how the zeros of characteristic polynomials are changed and we prove that a subset of these operators form a group, with respect to a well–defined composition law. Furthermore, we study a vast class of linear(More)