Papers by Sabahattin Aydin
Van Tıp Dergisi, 2001
Page 1. Aydın ve ark. Van Tıp Dergisi: 8 (3):102-104, 2001 20 Yaşında Görülen Değişici Epitel Hüc... more Page 1. Aydın ve ark. Van Tıp Dergisi: 8 (3):102-104, 2001 20 Yaşında Görülen Değişici Epitel Hücreli Mesane Tümörü Olgusu Sabahattin Aydın*, Yüksel Yılmaz*, Süleyman Özen**, Erdal Şengül* Özet: Yirmi yaşında bir erkek ...
Türk Üroloji Dergisi/Turkish Journal of Urology, 2007
Jhesp journal of health systems and policies, Jul 7, 2023
The time spent waiting is an important problem regarding patient satisfaction and hospital effici... more The time spent waiting is an important problem regarding patient satisfaction and hospital efficiency, and increases the need for evidence-based information for management to make decisions towards a solution. This study aims to examine the process flows in hospitals based on actual data with the intent to design a better service delivery system and set a pattern in terms of determining the congestion in the process and planning the necessary improvements. For this purpose, the data sets for 2016 pertaining to secondary and tertiary level hospitals in Turkey, which are stored in the central physician appointment system (CPAS), are investigated. The data is analyzed through pre-processing, cleaning and transformation stages. Congestion patterns are determined by days and hours spent in hospitals. Monday is found to be the day with the highest patient density and the longest wait time in Turkish hospitals. It is observed that wait times are shorter on Wednesday in the middle of the week, while they are longer on Friday, the last working day. Additionally, when analyzed by working hours, it is determined that the first 2 hours in the morning (9.00 a.m. to 11.00 a.m.) is the period when most patients are examined. The lunchtime (between 12.00 p.m. - 1.00 p.m.) and the afternoon from 4.00 p.m. to 5.00 p.m. are the times when patient density is the lowest, but average wait time is the longest. Turkish hospitals are found to be particularly congested on some days and during some hours regarding patient wait times. Thus, policy recommendations can be developed specifically to the days and times when congestion patterns are identified rather than suggesting a general policy. This study is the most comprehensive study conducted in Turkey through process data. The working model is reproducible in different countries and regions.
DergiPark (Istanbul University), Jan 7, 2019
Organization of primary health care services is the backbone of a health system. The aim of this ... more Organization of primary health care services is the backbone of a health system. The aim of this study is to scrutinize the policy trends regarding primary healthcare services and try to understand the transitions among them. The health policy changes and the related legislative documents were investigated throughout Turkish Republic period. The data were collected through document review method, and content analysis was made. Apart from political controversies and utterances, it is seen that in various time frames of the Turkish Republic, health policy has depicted the same issues as its objective. These issues have taken place not only in the country's political agenda, but also in lots of others in the new global view as well.
Kırıkkale Üniversitesi Tıp Fakültesi Dergisi
Amaç: İstanbul’daki kamu hastanelerindeki 2016 yılında bulunan çocuk sağlığı ve hastalıkları, iç ... more Amaç: İstanbul’daki kamu hastanelerindeki 2016 yılında bulunan çocuk sağlığı ve hastalıkları, iç hastalıkları, kadın hastalıkları ve doğum polikliniği ile genel cerrahi polikliniğine başvuran hastaların ayakta tedavi süreçlerindeki bekleme sürelerinin incelenmesi amaçlanmıştır. Gereç ve Yöntem: Kesitsel, retrospektif tanımlayıcı olarak yapılan çalışma kapsamında, araştırmanın evrenini 2016 yılındaki İstanbul’da hizmet veren 2. ve 3. basamak sağlık kurumlarında ayaktan tedavi başvuruları; örneklemi ise 2016 yılındaki 2. ve 3. basamak sağlık kurumlarındaki çocuk sağlığı ve hastalıkları, iç hastalıkları, genel cerrahi ile kadın hastalıkları ve doğum polikliniğine tedavi amaçlı başvuran ve muayene işlemi gerçekleştiren 847.972 hasta başvurusu oluşturmaktadır. Çalışmada ortalama, standart sapma, medyan, kartiller, yüzdelikler gibi tanımlayıcı istatistiklerin yanı sıra, değişkenlerin karşılaştırılması için bağımsız örneklem t-testi kullanılmıştır. Bulgular: Çalışmada sağlık kurumlarına ba...
The Journal of Urology, Nov 1, 1996
The efficacy of the selective serotonin re-uptake inhibitor fluoxetine in the treatment of premat... more The efficacy of the selective serotonin re-uptake inhibitor fluoxetine in the treatment of premature ejaculation was examined. The study comprised 17 patients with premature ejaculation who presented to the urology clinic of our medical school. In this double-blind study the patients were randomized into treatment groups receiving 20 mg. fluoxetine daily for 1 week and 40 mg. daily afterward (group 1) or 1 capsule placebo daily for 1 week and 2 capsules daily afterward (group 2). The groups were evaluated according to the latent period of intravaginal ejaculation. The latent period of intravaginal ejaculation in group 1 was significantly longer than that in group 2. Nausea, headache and insomnia were reported side effects. Fluoxetine may be regarded as a safe and effective alternative in the treatment of premature ejaculation.
Turkish Journal. of. Medical Sciences. ...
International Urology and Nephrology, Sep 1, 1998
International Urology and Nephrology, Jul 1, 1998
Forty-two young men with abacterial prostatitis underwent physical examination, semen analyses, r... more Forty-two young men with abacterial prostatitis underwent physical examination, semen analyses, rectal US (TRUS) and magnetic resonance imaging (MRI) of the pelvis. Findings on TRUS showed no distinct differences like capsular irregularity, dilatation of the seminal vesicles and calcified foci in the prostate. In MRI pathologic conditions were noted as transitional zone cysts, prostatic utriele cysts and abscesses of the seminal vesicles. MRI had been found superior to TRUS in imaging the prostate and to predict associated pathologic conditions. It is also concluded that some additional factors as a cause of prostatitis must be determined in patients with chronic abacterial prostatitis.
International Urology and Nephrology, Sep 1, 1998
We aimed to investigate the relationship between varicocele and lactic dehydrogenase (LDH), an in... more We aimed to investigate the relationship between varicocele and lactic dehydrogenase (LDH), an intracellular enzyme that indicates cellular damage. LDH levels were measured in the blood samples of 17 oligoasthenospennic infertile patients with varicocele which were obtained synchronously from spennatic and peripheral veins during operation. Sperm counts ranged from 1 to 74 million/ml, while motility ranged from 10% to 60%. LDH level in spermatic vein was found statistically higher than the level in peripheral vein (p=0.042). There was no correlation between sperm counts and LDH level in spermatic vein. We found a significant increase in spermatic vein LDH level in varicocele. We think that further studies are needed to reveal the relationship between spermatic vein LDH level and varicocele.
Clinical Chemistry and Laboratory Medicine, 1997
Activities of total lactate dehydrogenase, which plays an important role in providing energy for ... more Activities of total lactate dehydrogenase, which plays an important role in providing energy for cell metabolism, lactate dehydrogenase-X, an isoenzyme of lactate dehydrogenase supposed to be specific for germinal epithelium activity, diluted semen absorbance and some other properties have been measured in 51 seminal plasma samples. Aiming to study its clinical use as a marker of seminiferous epithelium activity, determination of isoenzyme-X and investigation of correlation between it and the spermiogram properties were carried out. Besides lactate dehydrogenase and lactate dehydrogenase-X activity, their ratio and diluted semen absorbance were correlated with the different properties of the spermiogram, the best correlation of the enzymes being obtained with the total sperm count and motile sperm count. Correlation of diluted semen absorbance with the total sperm count and motile sperm count was also noted, whereas it did not correlate with sperm concentration and motility rate. The data suggests the clinical utility of these properties as reliable markers for both germinal activity and spermatozoid quality when "total sperm count" and "motile sperm count" are used to define sperm properties instead of just sperm concentration and motility rate.
International Urology and Nephrology, Nov 1, 1997
Following experimental unilateral torsion of the testis the histologic effects of unilateral test... more Following experimental unilateral torsion of the testis the histologic effects of unilateral testicular torsion on the contralateral testis were investigated. Utilizing detorsion or orchiectomy at 4 hours and 8 hours after torsion, the effects of early and late treatment modalities on the contralateral testicle were observed. Morphometry of the contralateral testis revealed some alterations including focal sclerosis, decrease in mean seminiferous tubular diameter and a marked increase of the Leydig cells in some subgroups. In spite of some changes, definite evidence for contralateral damage due to ipsilateral torsion contributing to male infertility was hardly observed.
International Urology and Nephrology, Sep 1, 1997
Ureteral fibroepithelial polyps are rare benign tumours. Sometimes an ureteric calculus may be se... more Ureteral fibroepithelial polyps are rare benign tumours. Sometimes an ureteric calculus may be seen, proximal to the polyp. We describe a case of fibroepithelial polyp (FEP) associated with a calculus in the distal part of the right ureter. To our knowledge this is the first ureteral FEP reported in the literature associated with a ureteral calculus distal to it. Aetiology, clinical features, diagnosis and therapy of fibroepithelial polyps are discussed in the light of the literature.
Urology, Jul 1, 2001
Objectives. To investigate the effect of sildenafil together with the influence of sodium nitropr... more Objectives. To investigate the effect of sildenafil together with the influence of sodium nitroprusside and acetylcholine and further discuss its mechanism of action in vitro. Methods. Isolated strips of rabbit corpus cavernosum were stimulated isometrically with phenylephrine. Graded relaxations were induced using increasing concentrations of acetylcholine, sodium nitroprusside, and sildenafil alone and in combination. Results. The agents all relaxed the rabbit corpus cavernosal strips in a dose-dependent manner. The inhibitory potentials of the test agents were ranked (from least inhibitory to most inhibitory) as follows: sildenafil, acetylcholine plus sildenafil, sodium nitroprusside, sodium nitroprusside plus sildenafil, acetylcholine. The presence of sodium nitroprusside in the medium reduced the median effective dose for the sildenafil-induced relaxation of the cavernosal tissue from 3.65 ϫ 10 Ϫ5 M to 2.73 ϫ 10 Ϫ7 M, and the presence of acetylcholine reduced it to 9.79 ϫ 10 Ϫ6 M. Conclusions. Sildenafil enhances the relaxing effect of both sodium nitroprusside and acetylcholine on the phenylephrine-induced contraction of rabbit cavernosal tissue.
Scandinavian Journal of Urology and Nephrology, 1998
We present a new ureterocalicostomy technique in a patient with intrarenal pelvis together with r... more We present a new ureterocalicostomy technique in a patient with intrarenal pelvis together with renal artery compression on the pelvis and ureteropelvic junction (UPJ). The patient had grade 4 hydronephrosis in the left kidney and angulation at the ureteropelvic junction. We performed side-to-side ureterocalicostomy between the ureter and lower calyx of the kidney.
Turkish Journal of Medical Sciences, 1997
Turkish Journal. of. Medical Sciences. ...
Scandinavian Journal of Urology and Nephrology, 1997
We present an 18-month follow-up of a cystovaginoplasty case. Surgery was performed because of a ... more We present an 18-month follow-up of a cystovaginoplasty case. Surgery was performed because of a large vesicovaginal fistula. A new technique using the vagina as a pouch was utilized.
Clinical Biochemistry, Jun 1, 2002
The aim of the study was to compare serum levels of cytokeratin-18 of patients with bladder cance... more The aim of the study was to compare serum levels of cytokeratin-18 of patients with bladder cancer with those of the healthy controls, and to investigate the relation between cytokeratin level and the tumor stage. Serum cytokeratin-18 levels of 38 patients with bladder cancer and of 25 healthy people were determined. Tumor stage was T(1) in 12 patients, T(2) in 9 patients, T(3) in 10 patients and T(4) in 7 patients. The serum cytokeratin-18 levels in these cases were analyzed with respect to the stage of the tumor. Cytokeratin-18 level in the patient group was found to be significantly higher than that of the control group (p < 0.010) when the groups were totally compared. However, when the levels in patients with different tumor stages were compared with that of the controls, the difference was not significant in patients with stage 1 and 2 tumors (p > 0.05). Regarding the cut off value as 4.0 ng/mL, sensitivity and specificity for serum cytokeratin-18 were found to be 53% and 72% respectively. When sensitivity was calculated with respect to tumor stages, it was 8% for T(1,) 33% for T(2,) 90% for T(3) and 100% for T(4.) On the other hand, considering higher stage (T(3) and T(4)) tumors only, the sensitivity was calculated as 94%, but the sensitivity for lower stage (T(1) and T(2)) tumors was 19%. It is clear that serum cytokeratin-18 level increases in patients with bladder cancer. However, it can only be useful as a tumor marker in the diagnosis of T(3) and higher staged tumors. This study indicated that cytokeratin-18 does not have any diagnostic value in lower stage bladder cancers.
Medical Network Klinik Bilimler ve Doktor, 1997
International Urology and Nephrology, May 1, 1998
We report a case of primary, non-mucinous, non-papillary ureteral poorly differentiated adenocarc... more We report a case of primary, non-mucinous, non-papillary ureteral poorly differentiated adenocarcinoma. The primary focus could only be detected during surgical exploration, because computed tomography (CT), ultrasonography (US), intravenous urography (IVU) and other radiologic and endoscopic procedures revealed no primary neoplastic focus, only lymph node and various bone metastases. Total nephroureterectomy with a bladder cuff was performed to decrease pain of the patient and to remove the primary tumoral focus.
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Papers by Sabahattin Aydin