Oscillatory Carreau flows in straight channels.

The present paper studies the oscillatory flow of Carreau fluid in a channel at different Womersley and Carreau numbers. At high and low Womersley numbers, asymptotic expansions in small parameters, connected with the Womersley number, are developed. For the intermediate Womersley numbers, theoretical bounds for the velocity solution and its gradient, depending on the problem parameters, are proven and explicitly given.

[Retrosternal thyroid goiter: 20 years experience].

Retrosternal localization of thyroid pathology is not rare. We present a retrospective 20-years' research on 4225 patients with different thyroid diseases. 803 of them were with a different level/stage) of retrosternal localization of the gland.

[Medullary thyroid carcinoma--current surgical aspects. Overview and retrospective analysis of 22 cases].

Background: Medullary thyroid carcinoma (MTC) accounts for 5% to 10% of all thyroid malignancies. Approximately 75% of cases are sporadic. Familial forms of medullary thyroid carcinoma account for the remaining 25% of cases--MEN IIa, MEN IIb and FMTC.

[Subtotal resection of thyroid gland - optimal method for threatment of Bazedow disease. Prognosis].

Subtotal thyroidectomy is a widely accepted surgical procedure for Basedow disease. The purpose of this work is to evaluate functional long-term results and determine predictive prognostic factors of postoperative thyroid function. This is a retrospective study conducted on 207 patients with Basedow disease undergoing subtotal thyroidectomy during the period 1983-2004.