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Biomedical subjects

S Koçak

Publications and source records attributed to S Koçak.

17 recordsLinked to original sources
PubMed2006

Attitudes toward physical education classes of primary school students in Turkey.

The purposes of this study were to report an investigation of attitudes toward physical education in a sample of primary school students and examine the predictive influence of students' sex, grades in physical education classes, and parents' education and socioeconomic status on students' attitudes. Participants, 963 (474 girls and 489 boys) primary school students from Grades 6 (12.7%), 7 (10.3%) and 8 (77%), completed the Wear Attitude Inventory. Analysis indicated students had positive scores on General Attitudes rather than on Social, Emotional, and Physical Attitudes. In addition, girls (M = 32.6, SD = 3.9) had more positive General Attitudes than boys (M = 32.0, SD = 4.6). Also, students' grades in physical education classes were statistically significantly related to their Attitudes toward physical education (Wilks lambda, F1,1110 = 2.88, p < .05). However, parents' education and socioeconomic status were not. One may infer that ways of encouraging more favorable attitudes might be planned.

Adolescent↗
PubMed2004

Simultaneous differential pulse polarographic determination of cadmium, lead, and copper in milk and dairy products.

The contents of potentially toxic elements lead and cadmium and the essential element copper in various milk and dairy products consumed in Turkey were determined by differential pulse polarography (DPP), primarily to assess whether the intakes comply with recommended desired concentrations for essential and permissible levels for toxic elements. A simple and rapid DPP method has been developed for the simultaneous determination of cadmium, lead, and copper in samples. Using the differential pulse mode, half-wave peak potentials as E(1/2) were -0.58, -0.40, and -0.07 V for cadmium (Cd), lead (Pb), and copper (Cu), respectively. Marketed formulations of dairy products have been analyzed by calibration and standard addition methods. Recovery experiments were found to be quantitative. The linear domain ranges were 0.00-674.28 microg/L for Cd (R2 = 0.9999), 0.19-2.94 mg/L (p < 0.01) for Pb (R2 = 0.9997), and 0.41-133.46 microg/L for Cu (p < 0.01) (R2 = 0.9999). The studies have shown that the method is a rapid, reproducible, and accurate determination of these elements in milk and dairy products and can be used in the analysis of marketed formulations in the milk and dairy industry.

Animals↗
PubMed2003

Effects of high dose oral creatine supplementation on anaerobic capacity of elite wrestlers.

AIM: The purpose of this study was to investigate the effect of high dose oral creatine supplementation on anaerobic capacity of elite wrestlers. METHODS EXPERIMENTAL DESIGN: comparative randomized design. SETTING: Wingate anaerobic tests of the participants were taken at the Human Performance Laboratory of the Department of Physical Education and Sports in The Middle East Technical University, Ankara, Turkey. PARTICIPANT: 20 active international level wrestlers participated (22 to 27 years old). INTERVENTIONS: the daily dosage of creatine or placebo was divided into 4 equal amounts (5 gx4 = 20 g). Every 5 g of supplement was dissolved in 250 ml water and it was given to participants 1 hour before breakfast, lunch, dinner, and workout session. MEASURES: subjects underwent a 30-s Wingate Anaerobic tests until exhaustion in pre- and post-tests. After the pretest measurements were completed, participants were classified as creatine (Cr., n=10) and placebo (Pl., n=10) groups with regard to their average anaerobic power scores obtained during the test. RESULTS: Results of paired "t"-test revealed that there was no significant change in placebo group between pre- and post-test in average and peak anaerobic power. However, average and peak power mean scores obtained from post-test (8.123+/-0.448 W/kg and 10.523 +/-1.004 W/kg) were significantly (p<0.01) higher than pretest (7.233+/-0.483 W/kg and 8.992+/- 0.665 W/kg) for creatine group. Results of the independent "t"-test also indicated that the mean gained scores of creatine group in average and peak power were significantly higher than placebo group (p<0.01). CONCLUSION: This study demonstrates that short-term high dose oral creatine supplementation has an ergogenic effect on anaerobic capacity of elite wrestlers.

Adult↗
PubMed2002

Radioguided surgery in primary hyperparathyroidism.

UNLABELLED: Surgical neck exploration is usually made in primary hyperparathyroidism (PHPT). Localization of the adenoma or detection of hyperplasia may reduce the operation period and limit the extent of the surgery. In this study the effficacy of preoperative Tc-99m MIBI scintigraphy and intraoperative gamma probe was evaluated. MATERIALS AND METHODS: Six patients with PHPT had preoperative Tc-99m MIBI parathyroid scintigraphy and intraoperative gamma probe (IGP) was used in surgical neck exploration. RESULTS: Parathyroid adenoma was observed in 2/6 patients on scintigraphy in the right retroclavicular region and the left lobe of the thyroid. Both of them were clearly detected by IGP during the surgery and easily removed by the surgeon in a short time (35 min) with a small incision. Pathologic examination confirmed the parathyroid adenoma. No abnormal MIBI uptake was not observed in scintigraphy in 4/6 patients. Subtotal parathyroidectomy was performed in these patients. CONCLUSION: Preoperative Tc-99m MIBI scintigraphy and the use of IGP may limit the exploration and also the operation time and reduce surgical complications.

Adenoma↗
PubMed1999

Evaluation of vocal cord function after thyroid surgery.

OBJECTIVE: To compare clinical evaluation and indirect laryngoscopy with videolaryngostroboscopy (VLS), which is a new method of diagnosing abnormalities and dysfunction of the vocal folds. DESIGN: Prospective study. SETTING: Teaching hospital, Turkey. SUBJECTS: 218 patients who required thyroidectomy and who had no vocal abnormality preoperatively. INTERVENTIONS: Clinical evaluation, indirect laryngoscopy, and VLS before operation and on the second postoperative day. MAIN OUTCOME MEASURES: Sensitivity and specificity. RESULTS: The specificity of all three investigations was 100%. The sensitivity of VLS was 100%, of clinical evaluation 81%, and of indirect laryngoscopy 67%. CONCLUSIONS: Clinical evaluation and indirect laryngoscopy are safe ways of evaluating abnormalities of the vocal cords postoperatively. It would probably not be cost-effective to use VLS routinely, but for differential diagnosis and evaluation of prognosis of vocal abnormalities after thyroidectomy it is more accurate.

Adolescent↗
PubMed1998

Complications of radical hysterectomy: clinical experience of 115 early stage cervical cancers.

We evaluated the clinical experience of 115 women with early stage cervical cancer who had been operated in our Gynecologic Oncology Clinic. Of these, 85 were in stage I, and 30 in stage II. Intraoperative complications occurred in 16 patients including 3 cases concerning bladder, 1 ureter, 1 aorta, 5 v.cava inferior, 1 internal iliac a., 3 internal iliac v., 1 obturator nerve and 1 rectovaginal septum hematoma formation. Postoperative complications were observed in 38 patients. These were 14 bladder dysfunctions, 10 lymphocyst formations, 6 urinary infections, 12 wound infections, 3 pelvic infections, 2 eviscerations and 1 incisional hernia. However, no death occurred due to intraoperative or postoperative complications. Pelvic lymph node metastases were observed in 32 patients of whom 17 had only unilateral involvement, most often in the obturator region. Para-aortic lymph node metastases were diagnosed in 4 patients, all of whom were in stage II.

Blood Vessels↗
PubMed1997

Radial scar and tubular carcinoma of the breast.

A case of tubular carcinoma within a radial scar pattern is reported. The aim of this study is to support the opinion of the authors who believe that there is a relationship between tubular carcinoma and radial scar. We think that surgical biopsy should be recommended in all cases of stellate lesions detected at mammography.

Adenocarcinoma↗
PubMed1996

Recurrence after incisional hernia repair: results and risk factors.

A relatively low success rate in recurrent incisional hernia repair has prompted us to review the effects of certain risk factors on the long-term outcome of our cases. In this study, 109 recurrent incisional hernias were repaired and reviewed between 7 and 92 months after the operation. The recurrence rate was 45.0%. Many conditions that have been implicated as causal factors in the occurrence of incisional hernias were not found to be associated with recurrence after repair. However, chronic constipation was determined to be the most prominent risk factor associated with late recurrence.

Constipation↗
PubMed1996

Primary non-functioning tumours of the adrenal cortex: an eight-year experience in Turkey.

OBJECTIVE: To report our eight year experience of the treatment of primary non-functioning adrenal tumours diagnosed incidentally by computed tomography or ultrasonography. DESIGN: Open study. SETTING: University hospital, Turkey. SUBJECTS: 20 patients with primary non-functioning adrenal tumours that were diagnosed incidentally during the eight years 1986-93 and who were treated in our department. INTERVENTIONS: All patients underwent detailed endocrine studies followed by unilateral adrenalectomy. MAIN OUTCOME MEASURES: Morbidity, mortality, and outcome. RESULTS: There were 18 women and 2 men, mean age 50 (range 24-67). No patient died and one developed a wound infection. Histopathological examination showed adrenocortical adenoma (n = 17), carcinoma (n = 2, one of which was a 57-year-old woman with a 35 mm tumour), and hyperplasia (n = 1). CONCLUSION: Excision of non-functioning adrenal tumours is safe and we recommend it because there are no exclusion criteria for malignancy, and non-operative treatment has not been clearly defined.

Adrenal Cortex Neoplasms↗
PubMed1995

Evaluation of impotent men with intracorporeal injection of papaverine and colour Doppler ultrasound.

Fifty impotent patients have been evaluated with intracorporeal injection of papaverine and colour Doppler ultrasound. The papaverine tests were negative in 34 of 50 patients. Nineteen of 34 patients with negative papaverine results showed normal colour Doppler findings. In 14 of 16 patients with positive papaverine results the colour Doppler analysis revealed normal structure and functions. Correlation between intracorporeal papaverine injection and colour Doppler ultrasound results was found in 59% (p < 0.01). We concluded that intracorporeal papaverine injection is an effective, simple diagnostic test for beginning evaluation of impotent men. However, this screening test should be supported by colour Doppler ultrasound.

Adult↗
PubMedDate not supplied

Partial sacral resection and reconstruction with bone cement. Discussion of an operative experience.

Sacral resection is often the only way for effective palliation of the severe pain in tumors involving sacrum. However the operation hardly seems to be acceptable with the reported operative times, blood losses and complication rates. A case of retrorectal leiomyosarcoma invading sacrum, with severe pain resistant to combined irradiation and chemotherapy is reported. The tumor was removed with resection of the right two thirds of S2, S3 and S4, and the sacrum was reconstructed with bone cement. Complete relief of the pain was obtained with no postoperative complications. It is concluded that incomplete resection of the sacral vertebrae should be performed for sacral root pain palliation if other methods fail. Bone cement reconstruction seems to be a valuable alternative to muscle flaps in covering sacral defects.

Bone Cements↗
PubMedDate not supplied

Treatment of acute sigmoid volvulus.

Thirty-eight patients were treated for acute sigmoid volvulus in 9 years. Non operative decompression treatment was performed in 7 patients, and 31 patients underwent exploratory laparatomy (25 for suspected bowel necrosis and 6 for unsuccessful non operative treatment). Sigmoid resection and reanastomosis was performed in 5 of the 12 cases with gangrenous bowel and 10 of the 19 with viable bowel. There were no mortality and no morbidity related to the anastomoses. The results have shown that reanastomosis after sigmoid resection could be performed safely in selected cases of acute sigmoid volvulus even if there is bowel gangrene.

Acute Disease↗