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Biomedical subjects

M Yüksel

Publications and source records attributed to M Yüksel.

At least 55 records · Page 3Linked to original sources
PubMed1998

An unusual variation of extensor digitorum brevis manus: a case report and literature review.

An unusual variation of the extensor digitorum brevis manus in a male cadaver is presented. The band-shaped muscle was located at the ulnar side of the hand between the fourth and fifth extensors. It originated from the deep carpal fascia and inserted to the extensor tendons of the fourth and fifth fingers with a tendon and a slip, respectively. The origin, insertion, and location of the muscle differ from those previously reported; with these anatomic features, the muscle variation cannot be placed into the current classifications. The phylogenetic and ontogenetic implications of the muscle are reviewed.

Cadaver↗
PubMed1998

Adenosine protects against indomethacin-induced gastric damage in rats.

This study examines the putative gastroprotective effect of adenosine on indomethacin-induced gastric lesions and the possible mechanisms involved. After 24 hr of starvation, the rats were treated either with indomethacin (Indo; 25 mg/kg, subcutaneously) alone or adenosine + Indo (Ado; 7.5 mg/kg, subcutaneously, three times a day), or the vehicle (5% NaHCO3, subcutaneously). The length of hemorrhagic lesions in the stomachs was expressed as the lesion index. The tissue-associated myeloperoxidase (MPO) activity and protein oxidation were measured in gastric tissue samples. Formation of reactive oxygen species in gastric tissues was measured by using luminol- and lucigenin-enhanced chemiluminescence. In other groups of rats, gastric mucosal permeability and gastric acid output were performed following the same treatment regimens. The gastric mucosal permeability was measured by determination of [51Cr]EDTA clearance in a perfused stomach preparation and gastric acid secretion studies were performed following pylorus ligation. The lesion index, the increase in lucigenin-enhanced chemiluminescence, and the increase in gastric mucosal permeability in Indo-treated rats were reversed by Ado pretreatment. Ado pretreatment also prevented the increase in gastric acid output and gastric volume in Indo-treated rats. Thus, these findings implicate that exogenous adenosine has a protective role on indomethacin-induced gastric lesions, possibly by inhibiting gastric hyperacidity and reactive oxygen formation and by preventing disruption of the mucosal integrity.

Adenosine↗
PubMed1998

Oxygen radicals and nitric oxide in rat mesenteric ischaemia-reperfusion: modulation by L-arginine and NG-nitro-L-arginine methyl ester.

1. The aims of the present study were to detect changes in superoxide anion (O2.-), nitric oxide (NO) and other reactive oxygen species (ROS) directly by measurement of chemiluminescence (CL) and to investigate the role of L-arginine, a nitric oxide synthase (NOS) substrate, and NG-nitro-L-arginine methyl ester (L-NAME), a NOS inhibitor, together with their molecular enantiomers D-arginine and D-NAME, in a rat mesenteric ischaemia-reperfusion (I/R) model. 2. Seventy-nine female Wistar albino rats were divided into eight groups. The first three groups underwent sham operation; group 1 was the control group, group 2 received L-arginine and group 3 received L-NAME. Ischaemia was produced in the remaining five groups by ligation of the superior mesenteric artery for 30 min followed by 60 min reperfusion. Group 4 rats were control I/R rats and groups 5-8 received either L-arginine, L-NAME, D-arginine or D-NAME, respectively. 3. Both luminol and lucigenin CL was significantly increased in I/R groups compared with sham-operated groups. L-Arginine significantly reduced CL measurements. D-Arginine was also protective, but not as much as L-arginine. Both L- and D-arginine had in vitro O2.- (-)scavenging potential, as tested by the xanthine-xanthine oxidase system. NG-Nitro-L-arginine methyl ester decreased lipid peroxidation values in addition to reducing CL measurements. Nitric oxide concentrations were significantly increased in I/R groups in comparison with sham-operated groups. Peroxynitrite formation was increased by I/R. Treatment with L-NAME was beneficial by reducing NO concentrations in the reperfused ileum. 4. In our I/R model, O2.-, NO and other ROS were increased. Although NOS inhibitors were effective in reducing oxidative damage, increasing NO concentrations with L-arginine was also beneficial, presumably due to the ability of L-arginine to inhibit phagocyte adherence and its radical scavenging potential. In fact, NO may have different effects in terms of tissue injury or protection depending on the concentration of oxygen and the haemodynamic state of the tissue.

Acridines↗
PubMed1998

Concurrent anomalies of the abdominal arteries: an extremely long coeliac trunk, an inferior phrenic trunk, and an aberrant right hepatic artery.

We present a case in which the branching pattern of the abdominal arteries contains multiple variations that to date have not been reported together. The anomalies encountered include an extremely long coeliac trunk, an inferior phrenic trunk (as one of the branches of the coeliac trunk) and an aberrant (replaced) right hepatic artery derived from the superior mesenteric artery.

Abdomen↗
PubMed1997

Orbital hydatid cysts: report of four cases.

Hydatid cysts of central nervous system are rare and comprise only 2% to 3% of all hydatid cysts reported. Orbital localization is very uncommon and has been reported less than 1% of all hydatid diseases. The primary treatment of hydatid disease is surgical. The most important complication of the surgical treatment is secondary hydatidosis due to spillage of the cyst contents. Because of the difficulties of the orbital localization, total extirpation of the cysts without rupture is almost impossible. Preventing spontaneous rupture of the cysts during surgery and postoperative antihelmintic treatment should be taken into consideration in these cases. This study includes four cases who underwent surgery for orbital hydatid cysts. Radiological characteristics, operative technique and postoperative medical therapy are discussed.

Adolescent↗
PubMed1997

Esthesioneuroblastoma in a young child.

Esthesioneuroblastoma is an uncommon malignant neoplasm that arises from olfactory mucosa, often with intracranial extension. A case report of the youngest victim in the literature (2-year-old boy) is presented.

Child, Preschool↗
PubMed1997

The outcome of urological findings in operated tethered cord patients.

We studied the urological aspects of the tethered cord syndrome before and after untethering. Presenting urological symptoms include incontinence in 10 (38%), voiding difficulty in 8 (30%), stool soilage in 7 (27%), pollakiuria in 8 (30%) and urgency and symptomatic urinary tract infection in 9 patients (34%). All patients had presacral skin lesion. In all cases cystometric study was done preoperatively and postoperatively. In this study, we noted that the overall clinical symptomatology and urodynamic parameters improved in 67.0% and 49.0%, respectively. Although no patient became normal after surgery, we found better improvement in patients treated promptly by neurosurgical intervention.

Adolescent↗
PubMed1997

Thoracic surgery techniques of Serefeddin Sabuncuoğlu in the fifteenth century.

Serefeddin Sabuncuoğlu (1385 to 1470?) is known to be the author of the first surgery textbook, namely Cerrahiyyet'ül Haniyye (Imperial Surgery), written in Turkish in 1465. It is the first book to contain colored illustrations of surgical procedures, incisions, and instruments in the Turkish-Islamic medical literature. He was the first man to illustrate and mention introduction of a tube into the pharynx and upper esophagus, removal of foreign bodies in the esophagus by special instruments of his own design, and use of a silver ringlet in a man after tracheotomy. He also described and illustrated reduction of sternal fractures, thoracic puncture through the intercostal space for drainage of empyema cavities, and treatment of rib fractures that have severed the diaphragm. He was a humble, curious, and intelligent surgeon, and also a calligrapher and a miniature artist.

History, 15th Century↗
PubMed1997

Isolated primary chylopericardium.

Isolated primary chylopericardum is known to be a rare clinical entity. A 17-year-old girl was diagnosed as isolated primary chylopericardium. She was unresponsive to conservative treatment with pericardial tube drainage and medium chain triglyceride diet. At 2 weeks after the conservative treatment, ligation and resection of the thoracic duct with establishment of a pericardial window through a left thoracotomy was performed. At 6 months, follow-up showed no accumulation of the pericardial fluid. This case also supports that ligation and resection of the thoracic duct with establishment of a pericardial window is the treatment of choice in isolated primary chylopericardium.

Adolescent↗
PubMed1997

Cemil Topuzlu Pacha and his arterial suture technique.

Cemil Topuzlu Pacha (1868-1958) is known to be one of the most famous surgeons in Turkey through the early decades of the twentieth century. Being a talented and courageous surgeon, he performed many of the avoided operations of that time. He presented his vascular suture techniques at the International Medical Congress in Moscow in August 1897 and at the annual Congress of the Societe de Chirurgie de Paris in July 1904. He reported 2 cases of arterial tear during breast carcinoma resection and repair within the same session. He also reported the removal of a pen cover from the right main bronchus of a 7-year-old girl through a tracheotomy in 1903. He worked for 3 years with the famous French surgeon Jules Pean and became a preferred surgeon of the Ottoman Imperial family in Istanbul. He was admired for his scientific studies in international congresses and was one of the first Turkish surgeons who became a member of important European surgical associations.

General Surgery↗
PubMed1996

An axillary arch.

An axillary (axillopectoral) muscle (arch) was observed extending between the upper border of the latissimus dorsi and the lower border of the pectoralis major muscles in a 48-year-old male cadaver during our dissections. In the same cadaver, the pectoralis major muscle has entirely inserted into the most distal part of the tendon of deltoideus.

Axilla↗
PubMed1996

The principles of surgical management in dumbbell tumors.

OBJECTIVE: Tumors located in posterior mediastinum that extends into spinal canal via intervertebral foramen are called as Dumb-bell or Sand-glass tumors. Most of these tumors are neurogenic in origin but sometimes other rare tumors can also form in this shape. Herein three neurogenic tumors of the mediastinum that extended into the spinal canal are presented METHODS: In all patients that have been operated in our clinic during 1992-1993, we preferred one-stage removal described by Akwari that consists of posterior laminectomy by neurosurgical team to free the tumor within the spinal cord followed by a posterolateral thoracotomy and excision of the tumor by thoracic surgeons in the same setting. RESULTS: All three patients are alive and free of symptoms after 23, 16 and 13 months respectively. According to the pathological examinations of the specimens in the three patients, the exact diagnosis were reported as neurofibroma, paraganglioma and pheochromocytoma respectively. CONCLUSIONS: In recent reports, a combined surgical approach is recommended for dumb-bell neurogenic tumors in posterior mediastinum. We also recommend a combined and one stage removal of dumb-bell neurogenic tumors if possible. A team-work of thoracic and neurosurgeons will minimize the morbidity and mortality after the surgical procedure, as well as giving the opportunity to remove the tumor totally in one session.

Adolescent↗
PubMed1996

Endoaneurysmorrhaphy for left ventricular aneurysm. Follow-up in 69 patients.

We reviewed the cases of 69 consecutive patients who underwent physiologic reconstruction of the left ventricular cavity with an endoventricular patch (endoaneurysmorrhaphy) after aneurysmectomy. Eight patients had isolated endoaneurysmorrhaphy, 60 patients had concomitant coronary artery bypass grafting, and 1 patient had concomitant closure of an atrial septal defect. The primary indications for operation were angina pectoris (New York Heart Association functional class I or II) in 42 patients and dyspnea (functional class III or IV) in 27 patients. The preoperative left ventricular ejection fraction evaluated with ventriculography was 28.95% +/- 7.27% (mean +/- standard error of the mean). The global perioperative mortality rate was 2.8%. Total follow-up was 139.3 patient-years. The late mortality rate was 4.3% per patient-year. A marked increase was found in the mean postoperative left ventricular ejection fraction of the patients: 41.91% +/- 11.83%. Survivors were interviewed in person: their functional status was class I or II in 58 patients and class III in 3 patients. We conclude that left ventricular endoaneurysmorrhaphy results in satisfactory functional improvement and can be performed with relatively low early and late mortality rates.

Adult↗
PubMed1995

Failure of the isthmus lobe to fuse in the midline.

Four developmental anomalies of the thyroid gland are to be noted: a pyramidal lobe, failure of the lobes of thyroid tissue to develop, failure of the isthmus to fuse, and absence of a significant part of the lateral lobes. We encountered failure of the isthmus to fuse in the midline of the thyroid gland in a 48-year-old female cadaver.

Cadaver↗