In this paper, we study the matrix period and competition of Toeplitz matrices over a binary Boolean ring B={0,1}. Given subsets S T {1,…,n−1}, an n×n A=Tn〈S;T〉 is defined to have 1 as (i,j)-entry if only j−i∈S or i−j∈T. We show that max⁡S+min⁡T≤n min⁡S+max⁡T≤n, then A has d/d′ where d=gcd⁡(s+t|s∈S,t∈T) d′=gcd⁡(d,min⁡S). Moreover, it shown limit sequence {Am(AT)m}m=1∞ directed sum all ones exce...

Limited options to treat hypoxemia during one-lung venti• lation (OLV) compared to open thoracotomy. Continuous positive airway pressure (CPAP) interferes with surgical exposure during video-assisted thoracoscopic surgery (VATS). Priority on rapid and complete lung collapse. • Possibility of prolonged periods of OLV. Particularly dur• ing the learning phase of the surgical team. Decreased posto...

Objective: The purpose of this study was to assess the accuracy of cephalometric prediction tracings—performed for orthognathic surgery—by means of the cephalometric analysis of preoperative and seven-day postoperative tracings, in patients subjected to correction of mandibular deformities. Methods: The lateral cephalograms of 17 patients who had been submitted to mandibular orthognathic surger...

BACKGROUND Phytoestrogens are plant-derived natural molecules having some bone forming and bone substituting effects. In the present study, the role of phytoestrogens on bone healing was investigated in a rabbit fracture model. METHODS Twenty-two New Zealand white rabbits with right tibia fracture were divided into two groups randomly. The plant derived extract of Vitex agnus-castus L. (Verbe...

We evaluated the commonly prescribed analgesic buprenorphine in a postoperative pain model in rats, assessing acute postoperative pain relief, rebound hyperalgesia, and the long-term effects of postoperative opioid treatment on subsequent opioid exposure. Rats received surgery (paw incision under isoflurane anesthesia), sham surgery (anesthesia only), or neither and were treated postoperatively...

BACKGROUND Paravertebral block (PVB) has been an established technique for providing analgesia to the chest and abdomen. We conducted the current study to compare single-dose PVB versus single-dose epidural blockade (EP) for pain relief after renal surgery. METHODS Eighty patients scheduled for renal surgery were randomly assigned into two groups according to the analgesic technique, PVB grou...

OBJECTIVE This study aims to evaluate the production of interferon-gamma and interleukin-10 by stimulated peripheral blood mononuclear cells isolated from patients with supraglottic laryngeal cancer before and after surgical treatment. METHODS Fourteen patients with advanced supraglottic laryngeal cancer were studied. Cultures of peripheral blood mononuclear cells isolated during the preopera...

BACKGROUND AND OBJECTIVES In this study, the aim was to compare postoperative analgesia effects of the administration of ultrasound-guided interscalene brachial plexus block and intra-articular bupivacaine carried out with bupivacaine. METHODS In the first group of patients 20 mL 0.25% bupivacaine and ultrasound-guided interscalene brachial plexus block (ISPB) were applied, while 20 mL 0.25% ...

AIM Comparison of long-term preoperative and postoperative clinical and radiological results for patients diagnosed with degenerative disc disease that underwent posterior dynamic stabilization. Lumbar disc degeneration is caused by a variety of factors. Disruptions in the vertebral endplate result in defects in disc nutrition and, thus, disc degeneration. The aims of dynamic stabilization are ...

UNLABELLED A crooked nose is the result of deformities that might involve the bony nasal pyramid, the upper and lower lateral cartilages, and nasal septum, causing complaints of aesthetic and/or functional nature. PURPOSE To evaluate how satisfied are those patients who underwent rhinoplasty to correct crooked nose, through the questionnaire Rhinoplasty Outcomes Evaluation (ROE). MATERIAL A...