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Dive into the research topics where Hasan Bostanci is active.

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Featured researches published by Hasan Bostanci.


Surgery Today | 2010

Comparison of the classic limberg flap and modified limberg flap in the treatment of pilonidal sinus disease: A retrospective analysis of 416 patients

Murat Akin; Sezai Leventoğlu; B. Bülent Menteş; Hasan Bostanci; Hakan Gökbayir; Kadir Kiliç; Ersin Özdemir; Zafer Ferahköşe

PurposePilonidal sinus disease (PSD) is usually seen on the sacrococcygeal region in adolescent patients. The current study analyzed the outcome of the rhomboid excision and the Limberg flap procedure (cLF) in comparison to the modified Limberg flap procedure (mlF) for PSD.MethodsFour hundred and sixteen patients with PSD were operated on under spinal or general anesthesia by cLF and mlF. The patients were divided into two groups. In Group 1, cLF was performed on 211 patients. In Group 2, mlF was performed on 205 patients.ResultsNo significant difference was detected between Groups 1 and 2 in terms of sex, age, preoperative disease period, follow-up time, the mean hospital stay, and hypoesthesia. The mlF group had better clinical results than the cLF group. The recurrence rate was statistically higher in the cLF group 1 than in the mlF group (P = 0.036). The time to return to work, time to walk without pain, and time to be able to sit on the toilet without pain were longer in the cLF group (P = 0.001). The maceration and wound infection rate were statistically higher in the cLF group than in the mlF group (P = 0.020 and P = 0.019, respectively).ConclusionThe mlF is a more effective treatment than cLF for the surgical management of PSD.


Colorectal Disease | 2007

L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer.

Mehmet Oguz; Mustafa Kerem; Abdulkadir Bedirli; B. Bülent Menteş; Omer Sakrak; Bülent Salman; Hasan Bostanci

Objective  To investigate the effect of l‐alanine‐l‐glutamine (Gln) on postoperative complication rate and duration of hospitalization in patients operated for colorectal cancer.


Journal of Critical Care | 2009

Neopterin as a prognostic biomarker in intensive care unit patients

Terken Baydar; Osman Yüksel; Tolga Sahin; Kursat Dikmen; Gözde Girgin; Hande Sipahi; Osman Kurukahvecioglu; Hasan Bostanci; Mustafa Sare

PURPOSE The present study was undertaken to evaluate urinary neopterin in intensive care unit patients. MATERIALS AND METHODS Urinary neopterin levels were determined in systemic inflammatory response syndrome (n = 10), sepsis (n = 18), septic shock (n = 9), and multiple organ dysfunction syndrome (n = 5). It was tested whether neopterin is a differential parameter among the patient groups. Furthermore, the results were also evaluated by comparing with a healthy control group (n = 30), and the relationship between neopterin and mortality or Acute Physiology and Chronic Health Evaluation II scores were investigated. RESULTS Neopterin levels of the control group and patients were detected as 111 +/- 11 and 3850 +/- 1081 mumol/mol creatinine, respectively (P < .05). It was significantly increased in the sepsis and septic shock groups compared to the systemic inflammatory response syndrome group (P < .05). Neopterin levels were significantly higher in the patients with mortality and lower Acute Physiology and Chronic Health Evaluation II scores. CONCLUSION This study showed that monitoring of urinary neopterin profile can be used in intensive care units to show the degree and prognosis of the disease.


Journal of Surgical Research | 2010

Probiotic Agent Saccharomyces boulardii Reduces the Incidence of Lung Injury in Acute Necrotizing Pancreatitis Induced Rats

Melike Karen; Osman Yüksel; Nalan Akyürek; Ebru Ofluoglu; Kayhan Çağlar; Tevfik Tolga Şahin; Hatice Pasaoglu; Leyla Memis; Nusret Akyürek; Hasan Bostanci

BACKGROUND Acute necrotizing pancreatitis is a severe acute inflammatory disease of the pancreas that can lead to extrapancreatic organ involvement. Supervening lung injury is an important clinical entity determining the prognosis of the patient. Probiotics are dietary supplements known to reduce or alter inflammation and inflammatory cytokines. In the present study, we hypothesize that probiotics may reduce lung injury by reducing bacterial translocation, which results in reduced infection, inflammation, and generation of proinflammatory cytokines in an experimental model of acute necrotizing pancreatitis. METHODS Pancreatitis was induced by concomitant intravenous infusion of cerulein and glycodeoxycholic acid infusion into the biliopancreatic duct. Saccharomyces boulardii was used as the probiotic agent. Rats were divided into three groups: sham, pancreatitis-saline, which received saline via gavage at 6 and 24 h following the pancreatitis, pancreatitis-probiotics, which received probiotics via gavage method at 6 and 24 h following the pancreatitis. The rats were sacrificed at 48 h, venous blood, mesenteric lymph node, pancreatic and lung tissue samples were obtained for analysis. RESULTS Serum pancreatic amylase, lactate dehydrogenase, secretory phospholipase A(2), and IL-6 were found to be increased in pancreatitis-saline group compared with the other groups (P < 0.05). Histological analyses revealed that edema, inflammation, and vacuolization as well as polymorphonuclear leukocyte infiltration in the lung tissue was significantly reduced in the probiotic treated group. Bacterial translocation was significantly reduced in the probiotic treated group compared with the other groups (P < 0.05). CONCLUSION These results suggest that Saccharomyces boulardii reduce the bacterial translocation. As a result of this, reduced proinflammatory cytokines and systemic inflammatory response was observed, which may be the reason underlying reduced lung injury in acute necrotizing pancreatitis.


Human & Experimental Toxicology | 2007

Effects of the probiotic agent Saccharomyces Boulardii on the DNA damage in acute necrotizing pancreatitis induced rats

Tolga Sahin; Sevtap Aydın; Osman Yüksel; Hasan Bostanci; Nalan Akyürek; Leyla Memis; Nurşen Başaran

Pancreatitis is a mild and self-limiting disease. Although severe forms such as acute necrotizing pancreatitis (ANP) are rare it is associated with significant mortality rate reported to be 30—70%. Probiotics are viable microbial dietary supplements when introduced in sufficient quantities can have beneficial effects. The physiological effects of probiotics include suppression of bacterial infections, production of some digestive enzymes and vitamins and reconstruction of normal intestinal microflora. In the present study, the aim was to investigate the role of probiotics on the DNA damage in the peripheral lymphocytes, in the exfoliated epithelial cells and lymphocytes of the peritoneal fluids and in the pancreatic acinar cells of ANP induced rats. DNA damage was determined by COMET assay. ANP was induced by intravenous infusion of cerulein and superimposed infusion glycodeoxycholic acid into biliopancreatic duct. Saccharomyces Boulardii was used as the probiotic agent. DNA damage in pancreatic acinar cells and exfoliated epithelial cells and the lymphocytes of the peritoneal fluids; was significantly higher in pancreatitis group compared to the controls and probiotic treated groups (P <0.001). No significant difference was observed in the DNA damage between the groups in the peripheral lymphocytes. In conclusion; our results support that probiotic agent Saccharomyces Boulardii can diminish bacterial infections and offer health benefits in the therapy of pancreatitis. Human & Experimental Technololgy (2007) 26, 653—661


Journal of Gastrointestinal Surgery | 2008

Keyhole Deformity: A Case Series

Osman Yüksel; Hasan Bostanci; Sezai Leventoğlu; Tolga Şahin; B. Bülent Menteş

ObjectiveKeyhole deformity is frequently encountered after posterior internal sphincterotomy but may be observed after lateral internal sphincterotomy or in patients without any history of previous anal surgery. The aim of the present study is to emphasize the surgical significance of this entity and discuss the possible strategies in the treatment of the deformity.Material and MethodsPatients in whom keyhole deformity developed after surgical or conservative treatment applied for chronic anal fissure in our clinic and patients referred from other centers were recruited.ResultsNine-hundred twenty-six patients were treated for chronic anal fissure. A hundred of these patients directly underwent lateral internal sphincterotomy. The remaining 826 patients initially received conservative management, and 676 of them eventually underwent lateral internal sphincterotomy. In total, 15 patients were diagnosed to have significant keyhole deformity. Initially, all patients received conservative treatment for keyhole deformity, which was successful in two patients. Of the 13 patients in whom conservative management failed, nine underwent advancement flap reconstruction and the remaining four diamond flap reconstruction.ConclusionKeyhole deformity is occasionally seen as a late complication of chronic anal fissure and may be well tolerated by the patients without any well-defined symptoms. The treatment strategy is directed toward the degree of functional alteration.


Turkish Journal of Medical Sciences | 2016

The effect of pneumoperitoneum on intravascular fibrinolytic activity in rats.

Kursat Dikmen; Asiye Uğraş Dikmen; Hasan Bostanci; Ahmet Karamercan; Münci Yağci; Murat Akin; Bülent Aytaç

BACKGROUND/AIM Venous stasis during pneumoperitoneum in laparoscopic surgery is closely related to fibrin synthesis and deposition. The etiologic factors underlying fibrinolysis or hypercoagulability are not clearly defined. This study aimed to determine the effects of pneumoperitoneum time and pressure on coagulation cascade and the fibrinolytic pathway. MATERIALS AND METHODS After the pneumoperitoneum model was established in rats, PAI-1, tPA, TAFI, D-dimer, and fibrinogen activities were evaluated in different time periods under different pressures in groups including 6 rats. Group 1 did not undergo any procedure. Group 2 received 8 mmHg of pressure for 30 min, Group III 8 mmHg for 60 min, Group IV 12 mmHg for 30 min, and Group V 12 mmHg for 60 min. RESULTS D-dimer levels had a tendency to decrease with increasing intraabdominal pressures. In both low and high pressure groups, fibrinogen had a tendency to increase with exposure time. There was no statistically significant difference among the study groups in terms of fibrinogen, D-dimer, and PAI-1. The levels of TAFI were significantly decreased with increasing pressure regardless of the exposure time. CONCLUSION Pneumoperitoneum of the coagulation system can be changed by duration of time and pressure.


Acta Chirurgica Belgica | 2009

Gastrocolic Fistula as a Complication after Gastrojejunostomy

Ahmet Karamercan; Hasan Bostanci; Bülent Aytaç

Abstract Gastrocolic fistula formation is an extremely rare complication of gastric ulcer disease. We report a case of a 55-year-old man who presented with a two-month history of abdominal discomfort, postprandial diarrhea, nausea and faecal vomiting. Upper gastrointestinal endoscopy showed an ulcer in the greater curvature of the stomach. Barium enema examination revealed an obvious gastrocolic fistula between the greater curvature of the stomach and the transverse colon. The involved segment of the colon was excised and truncal vagotomy and antrectomy was performed. The patient was discharged on the 7th postoperative day. It is concluded that cases with postprandial diarrhea and nutritional disturbances after gastric surgery should remind us of the probability of gastrocolic fistula formation.


Advances in Therapy | 2007

Importance of sentinel lymph nodes in colorectal cancer : A pilot study

Hande Köksal; Hasan Bostanci; B. Bülent Menteş

Accurate identification of lymph nodes involved in metastases is vitally important for predicting survival, and it facilitates decision making with regard to adjuvant therapy. The study described here, which was undertaken to evaluate the role of sentinel lymph node mapping in refining the staging of colorectal cancer, was performed prospectively in 19 patients with colorectal cancer who underwent surgery from January to July 2005. Sentinel lymph node sampling was performed during each operation with isosulfan blue dye. Additional immunohistochemical staining was performed only if the sentinel nodes were negative for metastasis. In 18 of 19 patients, at least 1 sentinel node was identified. In 5 of 18 patients, sentinel nodes were positive for metastasis, and in 3 of 5, the sentinel node was the only node containing metastasis that was detected by immunohistochemical staining. In 3 patients, metastases in nonsentinel lymph nodes were detected by hematoxylin and eosin staining; these were determined to be false-negative results. Upstaging associated with sentinel lymph node mapping may reveal disease that might otherwise remain undetected by conventional methods. Patients who are upstaged may benefit from adjuvant therapies that have been shown to improve survival.


The Pan African medical journal | 2018

A case of Brunners gland adenoma mimicking tumors induced from head of the pancreas

Hasan Bostanci; Kursat Dikmen; Özgür Ekinci; Cagrι Buyukkasap; Mustafa Kerem

Brunners Gland Adenoma is a very rarely seen benign tumor of duodenum. While it generally leads to obstruction and bleeding complaints, it may very rarely occur by mimicking a pancreatic tumor. A 48 years old male patient admitted to the gastroenterology clinic due to the epigastric pain spreading dorsally. No significant feature is present in his clinical history. A lesion containing cystic solid components in the size of 30x40 mm was detected in the head of pancreas as a result of the abdominal tomography. In the light of these findings, pancreaticoduodenectomy is applied to the patient. It is observed that tumor is in submucosal location and widely invaded the pancreatic head. In the histopathological examination, Brunners Gland Adenoma is reported in pancreatic head localization. In this manuscript a case of Brunners gland adenoma diagnosed by performing pancreaticoduodenectomy due to the mass in the head of the pancreas is presented.

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