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Öğe Bacterial adhesion to braided surgical sutures: an in vitro study(Springer, 2016) Boybeyi, Ozlem; Kacmaz, Birgul; Gunal, Yasemin Dere; Gul, Serdar; Yorubulut, Serap; Aslan, Mustafa KemalBackground Surgical suture materials are accepted to be associated with a substantial proportion of surgical site infections. These infections are related with biofilm formation similar to that of other synthetic and implantable medical devices. Methods We conducted an in vitro study to investigate the bacterial adherence to different types of braided surgical sutures. The included sutures were polyglactin (Vicryl (R)) group (VG), rapidly absorbable polyglactin (Rapide-Vicryl (R)) group (RVG), nitrofurazone-coated polyglactin (Vicryl (R)) group (FVG), polyethylene terephthalate (Etibond (R)) group (EG), and natural silk (Silk (R)) group (SG). All sutures were cut in 1 cm length, embedded into tryptic soy broth, and then 10(6)-CFU/ml Escherichia coli and Staphylococcus aureus were added. After the 24th and 96th hour of incubation, bacterial colonies were counted, and results were expressed as CFU/cm. Results E. coli adhesion was significantly lower in VG and significantly higher in SG compared to FVG, RVG, and EG at the 24th and 96th hour of cultivation (p< 0.05). The S. aureus adhesion results at 24th hour showed that VG had the least bacterial adhesion, and FVG had the most bacterial adhesion compared to other sutures (p< 0.05). The S. aureus adhesion results at the 96th hour of cultivation showed that bacterial adhesion on sutures was not significantly different between groups (p> 0.05). Conclusion Of all braided surgical sutures, bacterial adhesion is significantly lower in polyglactin and significantly higher in silk sutures. Nitrofurazone coverage of suture worsens S. aureus contamination of the suture.Öğe Caudate lobe of the liver as the only content of the umbilical cord hernia(Wiley-Blackwell, 2015) Boybeyi, Ozlem; Ozmen, Ismail; Gunal, Yasemin Dere; Aslan, Mustafa Kemal; Aliefendioglu, Didem…Öğe Cognitive and behavioral characteristics of children with caustic ingestion(W B Saunders Co-Elsevier Inc, 2015) Cakmak, Murat; Gollu, Gulnur; Boybeyi, Ozlem; Kucuk, Gonul; Sertcelik, Mehmet; Gunal, Yasemin Dere; Kilic, Birim GunayBackground/aim: Children with attention-deficit/hyperactivity disorder (AD/HD) have risk taking behavior and are more prone to sustaining injury. It is aimed to evaluate the cognitive and behavioral characteristics of children with caustic ingestion. Patients and methods: Ninety two children with a history of nonsuicidal caustic ingestion (CI, n = 46) and healthy subjects (HS, n = 46) admitted to pediatric surgery department were enrolled into the study. Patients in groups were evaluated for age, sex, number of siblings and educational status of the parents. Before filling the questionnaires, the children were undergone flexible endoscopy and treated accordingly. Conners Parents Rating Scale-revised long form (CPRS-R:L), validated for Turkish Children, was used to evaluate the cognitive and behavioral characteristics of children. Parents rate their child's behavior with a four-point Likert scale. Subscales of CPRS-R: L including cognitive problems/inattention (CG/I), hyperactivity (H), attention deficit hyperactivity disorder index (AD/HD-I), Conners' Global Index-discomfort-impulsivity (CGI-DI), DSM-IV-symptom subscale-inattention (DSMIV, SS-I), DSM-IV-symptom subscale-hyperactivity-impulsivity (DSM-IV, SS-HI), DSMIV-symptom subscale-total score (DSM-IV SS-T) were used to determine the severity of the AD/HD symptom. Demographic features and cognitive/behavioral characteristics of children with caustic ingestion were compared with healthy subjects. Results: The median age of the patients was 4 (2-14 years) in both CI and HS groups. Female male ratio was 13:33 in CI and 12:34 in HS. Sixty seven percent of patients were preschool children (younger than 5 years of age) in both CI and HS groups. There was no difference between groups for number of siblings (p > 0.05). Parents of HS group had higher educational status than parents in CI (p < 0.05). When subscale scores of CPRS-R: L compared between CI and HS groups, CI group had higher CGI-DI scores than HS (p < 0.05). Children younger than five years of age had higher scores of H, emotional instability and total CG/I in CI than HS group (p < 0.05). Conclusion: Children with caustic ingestion had impulsiveness behavior when compared to healthy children. In addition to impulsivity, hyperactivity can be also assessed as a risk factor for caustic ingestion in children younger than 5 years of age. We suggest that association between AD/HD behavior and risk of sustaining injuries was also confirmed for caustic ingestion in children. (C) 2015 Elsevier Inc. All rights reserved.Öğe Contribution of Bone Marrowe-Derived Mesenchymal Stem Cells to Healing of Pulmonary Contusion-Created Rats(Academic Press Inc Elsevier Science, 2021) Demir, Sabri; Erturk, Ahmet; Gunal, Yasemin Dere; Ozmen, Ismail; Zengin, Mehmet; Yildiz, Dincer; Karaoz, ErdalBackground: The most common thoracic injury in children, resulting in trauma, is pulmonary contusion (PC). Bone marrowe-derived mesenchymal stem cells (BM-MSCs) are used in wound healing and many other diseases. This study aims to examine the effects of BM-MSCs on PC healing in rats. Materials and methods: A total of 45 male Wistar albino rats were used. Four groups were formed. BM-MSCs were labeled with the green fluorescent protein. PC was observed in the control group. In group II, PC occured and left to spontaneous healing. In group III, PC formed and BM-MSCs were given. In group IV, BM-MSCs were given without PC formation. Subjects were sacrificed 1 week later. Whether there was any difference in terms of BM-MSC involvement and lung injury score was investigated. Statistical analysis was performed using the Statistical Package for Social Sciences (SPSS), version 17.0, software (SPSS Inc., Chicago, IL), and p value of <0.05 was considered statistically significant. Results: BM-MSCs were collected much more in the lungs in group III than in group IV. Group III had a lower lung injury score value than group II. Conclusion: The greater involvement of the BM-MSCs in the injury site, and further reductions in lung injury score suggest that BM-MSCs are contributing to the healing of the injury. The use of BM-MSCs in risky patients with diffuse PC may be an alternative treatment to conventional methods. (C) 2020 Elsevier Inc. All rights reserved.Öğe Contribution of Bone Marrow–Derived Mesenchymal Stem Cells to Healing of Pulmonary Contusion-Created Rats(Academic Press Inc., 2021) Demir, Sabri; Erturk, Ahmet; Gunal, Yasemin Dere; Ozmen, Ismail; Zengin, Mehmet; Yildiz, Dincer; Karaoz, ErdalBackground: The most common thoracic injury in children, resulting in trauma, is pulmonary contusion (PC). Bone marrow–derived mesenchymal stem cells (BM-MSCs) are used in wound healing and many other diseases. This study aims to examine the effects of BM-MSCs on PC healing in rats. Materials and methods: A total of 45 male Wistar albino rats were used. Four groups were formed. BM-MSCs were labeled with the green fluorescent protein. PC was observed in the control group. In group II, PC occured and left to spontaneous healing. In group III, PC formed and BM-MSCs were given. In group IV, BM-MSCs were given without PC formation. Subjects were sacrificed 1 week later. Whether there was any difference in terms of BM-MSC involvement and lung injury score was investigated. Statistical analysis was performed using the Statistical Package for Social Sciences (SPSS), version 17.0, software (SPSS Inc., Chicago, IL), and p value of <0.05 was considered statistically significant. Results: BM-MSCs were collected much more in the lungs in group III than in group IV. Group III had a lower lung injury score value than group II. Conclusion: The greater involvement of the BM-MSCs in the injury site, and further reductions in lung injury score suggest that BM-MSCs are contributing to the healing of the injury. The use of BM-MSCs in risky patients with diffuse PC may be an alternative treatment to conventional methods. © 2020 Elsevier Inc.Öğe Danger in unlabeled bottles: Analysis of corrosive substances(Aves, 2015) Boybeyi, Ozlem; Gollu, Gulnur; Kisa, Ucler; Bahadir, Berktug; Gunal, Yasemin Dere; Kucuk, Gonul; Cakmak, Murat…Öğe Does penile tourniquet application alter bacterial adhesion to rat urethral cells: an in vitro study(W B Saunders Co-Elsevier Inc, 2018) Boybeyi-Turer, Ozlem; Kacmaz, Birgul; Arat, Esra; Atasoy, Pinar; Kisa, Ucler; Gunal, Yasemin Dere; Soyer, TutkuPurpose: To investigate the effects of penile tourniquet (PT) application on bacterial adhesion to urothelium. Methods: Fifty-six ratswere allocated into control group (CG), shamgroup (SG), PT group (PTG). No intervention was applied in CG. A 5mm-length urethral repair was performed in SG and PTG. In PTG, a 10-min duration of PT was applied during the procedure and the tissue oxygenation monitor was used to adjust the same degree of ischemia in all subjects. Sampleswere examined for wound healing parameters and tissue levels of inflammatory markers, eNOS, e-selectin, and ICAM-1antibodies. The adhesion of Escherichia coli to urotheliumwas investigated with in vitro adhesion assay. Results: Inflammation was higher and wound healing was worse in SG than CG and in PTG in comparison to CG and SG (p < 0.05). The endothelial damage, as shown by eNOS expression, was significantly higher in PTG compared to CG and SG (p < 0.05). The staining with ICAM-1 and e-selectin antibodies, showing increased inflammatory response to bacterial adhesion, was significantly higher in PTG compared to CG and SG (p < 0.05). In vitro urethral cell proliferation was achieved only in CG and SG revealing significantly increased adhesion in SG compared to CG (p < 0.05). The PT application caused endothelial corruption and prevented cell proliferation in cell culture. Conclusion: The PT application does not improve wound healing and increases bacterial adhesion molecules in penile tissue. The in vitro assays showed that PT causes severe endothelial damage and inhibits endothelial cell proliferation. (c) 2017 Elsevier Inc. All rights reserved.Öğe The effect of colchicine and low-dose methotrexate on intestinal ischemia/reperfusion injury in an experimental model(W B Saunders Co-Elsevier Inc, 2014) Boybeyi, Ozlem; Gunal, Yasemin Dere; Atasoy, Pinar; Kisa, Ucler; Aslan, Mustafa KemalAim: Intestinal ischemia/reperfusion (I/R) injury is a serious clinical condition. Colchicine and low-dose methotrexate have anti-inflammatory features. An experimental model was conducted to investigate the effect of colchicine and methotrexate on intestinal I/R injury. Methods: Twenty-four rats were included. Only laparotomy was done in control group (CG, n = 6). In experimental groups, superior mesenteric artery was occluded. After 1 h ischemia, reperfusion (1 h) was started by de-occlusion. 30 min before reperfusion, saline in sham group (SG,n: 6), colchicine (1 mg/kg) in colchicine group (CNG, n: 6), andmethotrexate (0.1 mg/kg) in methotrexate group (MTXG, n: 6) were infused intraperitoneally. Small intestines were harvested for evaluation of intestinal mucosal injury (Chiu score) and oxidative stress markers (nitric oxide: NO, malondialdehyde: MDA, superoxide dismutase: SOD). Results: Biochemically, MDA levels were significantly low in CG compared to SG, CNG, and MTXG (p < 0.05). NO levels were significantly low and SOD levels were significantly high in CG compared to MTXG (p < 0.05). Histopathologically, Chiu score was significantly low in CG compared to SG, CNG, and MTXG (p < 0.05), and significantly high in MTXG compared to SG and CNG (p b 0.05). Conclusion: The present experimental model caused I/R injury in rat intestines. Contrary to literature, it was found that methotrexate worsens and colchicine does not attenuate intestinal I/R injury. (C) 2014 Elsevier Inc. All rights reserved.Öğe The Effect of Extractum Cepae, Heparin Sodium, and Allantoin in Experimental Peritoneal Adhesion(SPRINGER INDIA, 2020) Ozmen, Ismail; Gunal, Yasemin Dere; Atasoy, Pinar; Kisa, Ucler; Yorubulut, Serap; Aslan, Mustafa Kemal; Boybeyi-Turer, OzlemThe purpose of the study is to investigate the effects of extractum cepae (EC), heparin sodium (HS), and allantoin (AA) on postoperative peritoneal adhesion (PPA) prevention. Forty-eight rats were allocated into six groups (n = 8). PPA was performed by Harris method. In group 1, no additional procedure was done. Abdominal cavity was washed with normal saline in group 2, EC in group 3, HS in group 4, AA in group 5, and EC-HS-AA mixture (EHA-m) in group 6. On the 21st postoperative day, PPA was scored with Nair adhesion score and examined for fibrosis histopathologically and hydroxy-proline levels (OHP) biochemically. Macroscopically, PPA was decreased in groups 2, 4, and 6 compared to groups 1, 3, and 5 (p < 0.05) and decreased in group 2 compared to other groups (p < 0.05). Histopathologically, fibrosis was decreased in groups 2, 4, and 6 compared to other groups and decreased in group 2 compared to other groups (p < 0.05). Tissue OHP level was decreased in groups 2, 3, 4, and 5 compared to groups 1 and 6 (p < 0.05). Tissue OHP level was decreased in group 6 compared to group 1, but the difference was not statistically significant. PPA formation decreases with normal saline, HS and EHA-m, whereas increases with EC and AA both macroscopically and microscopically. Although HS and EHA-m seem to have adhesion prevention effect, washing the intestines with saline seems to be more effective.Öğe Investigation of the effect of dorsal penile block to penile tissue(Elsevier Sci Ltd, 2015) Boybeyi, Ozlem; Gunal, Yasemin Dere; Atasoy, Pinar; Kisa, Ucler; Aslan, Mustafa KemalBackground Dorsal penile block (DPB) is a frequently used technique for regional anesthesia, but the effect of DPB on penile tissue has not been reported so far. Objective An experimental study was conducted to evaluate the acute effects of DPB on penile tissue. Methods Eighteen male rats were included and randomly assigned to three groups. No intervention was made in the control group (CG, n = 6). In the sham group (SG, n = 6) 1 ml normal saline, and in DPB group (PBG, n = 6) 1 ml of 0.25% bupivacaine without adrenaline (0.5 mg/kg), was infused with a 30 mm, 23 gauge needle. DPB was performed by inserting the needle in the midline when pulling down the penis and directing the needle to the 11 and 1 o'clock positions. Another puncture was done at the midline on the ventral side and the remaining drug was infused slowly. The penile tissues were harvested for biochemical (malonyldialdehyde: MDA; nitric oxide: NO; superoxide dismutase: SOD) and histopathological examination. Histopathological assessments were made of inflammation, edema and fibrosis; epithelial degradation in the urethra; vascular obliteration in periurethral tissue; and the peripheral nerve cells. Results Concentrations of NO and SOD were significantly decreased in the PBG compared with the CG and SG (p < 0.05). The concentration of MDA was significantly increased in the PBG compared with the CG and SG (p < 0.05) (Table). Histopathological examination revealed no significant difference between groups regarding edema, inflammation, or fibrosis (p > 0.05). In hematoxylin and eosin stain samples, vascular structures of the corpus cavernosa were slightly decreased in number in the SG and PBG compared with the CG, but that difference was not statistically significant (p > 0.05). The S100 staining was significantly higher in the PBG and SG compared with the CG (p < 0.05), and significantly higher in the SG compared with the PBG (p < 0.05). Discussion DPB causes alteration in oxidative stress markers because of an unknown effect. Although the results revealed increased inflammatory reaction in penile tissue after DPB, they are not enough to suggest not using bupivacaine for DPB in clinical practice. Conclusion Although DPB does not cause any major histopathological alteration, it results in an increase in inflammatory response in the penile tissue in the short term.Öğe Investigation of the effects of enteral hormones on the pyloric muscle in newborn rats(W B Saunders Co-Elsevier Inc, 2015) Boybeyi, Ozlem; Soyer, Tutku; Atasoy, Pinar; Gunal, Yasemin Dere; Aslan, Mustafa KemalPurpose: To investigate the effects of enteral hormones on pyloric muscle in order to clarify the etiopathogenesis of hypertrophic pyloric stenosis (HPS). Methods: Forty-two newborn Wistar-Albino rats were included. No intervention was done in the control group (CG, n = 6). In the sham group (SG, n = 6) 1 ml saline (0.9% NaCl solution), in the Nw-nitro-L-arginine methyl ester hydrochloride (L-NAME) group (LNG, n = 6) 100 mg/kg/d L-NAME, in the somatostatin group (STG, n = 6) 7 mcg/kg/d ST, in the cholecystokinin group (CCKG, n = 6) 3 mcg/kg/d CCK, in the substance P group (SPG, n = 6) 5 ml/kg/d SP, and in the prostaglandin-E1 group (PGE1G, n = 6) a cumulative dose of 360 mcg/kg PGE1 was given intraperitoneally for 14 days. On the 21st day, histopathological examination and muscle thickness measurements were done. Results were evaluated statistically. Results: Total and circular pyloric muscle thicknesses were significantly increased in the LNG compared to the CG and SG (p < 0.05). Circular pyloric muscle thickness was not increased in the STG, CCKG and SPG compared to the CG and SG (p > 0.05). In the PGE1G, muscle thickness was significantly decreased in the pylorus and increased in the antrum compared to the CG and SG (p < 0.05). Conclusion: Nitric oxide synthase (NOS) inhibition with L-NAME seems to be a causative factor in HPS by increasing pyloric muscle thickness. PGE predominantly affects antral gastric muscle and has no profound effect on pyloric muscle. (C) 2015 Elsevier Inc. All rights reserved.Öğe A rare cause of acute abdominal pain in children: Isolated tubal torsion; a case series(Kare Publ, 2017) Gunal, Yasemin Dere; Bahadir, Gokhan Berktug; Boybeyi, Ozlem; Cil, Aylin Pelin; Aslan, Mustafa KemalIsolated tubal torsion -a rare cause of acute abdomen in children-is usually difficult to diagnose because of non-specific findings. Surgical salphingectomy is required in delayed diagnosis in most cases. Three sexual inactive adolescents diagnosed in isolated tubal torsion (ITT) were discussed for its diagnostic features and surgical management. Laboratory tests and radiological studies including ultrasonography (US), color doppler ultrasound were performed in all patients after evaluation for acute lower abdominal pain in emergency department and they underwent surgical intervention with laparotomy (n:2) and laparoscopy (n:1). One of the patients in this study had salpingectomy. Detorsion of the fallopian tube and cyst excision were performed in the remaining two patients who also had paratubal cysts. There was no recurrence in these patients during the follow-up for 3 and 2 years. The isolated tubal torsion should be kept in mind and early surgical management is essential in order to preserve fallopian tube because of its importance in fertility. Copyright (C) 2016 The Emergency Medicine Association of Turkey. Production and hosting by Elsevier B.V. on behalf of the Owner. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Öğe Scrotal pearl is not always a sign of anorectal malformation: median raphe cyst(Turkish J Pediatrics, 2013) Soyer, Tutku; Karabulut, Ayse Anil; Boybeyi, Ozlem; Gunal, Yasemin DerePearls of meconium can be seen on the raphe of the scrotum and are considered as a sign of anorectal malformation (ARM). Scrotal pearls without ARM are rare in children and designated as median raphe cyst of the scrotum (MRC). A six-month-old boy with scrotal pearls without ARM is presented to discuss the clinical features and treatment modalities of MRC in infants.Öğe Single port thoracoscopic sympathectomy for primary palmar hyperhidrosis in adolescence(Tubitak Scientific & Technical Research Council Turkey, 2014) Gunal, Nesimi; Ozpolat, Berkant; Gunal, Yasemin Dere; Dural, KorayAim: Hyperhidrosis is defined as excessive sweating beyond the physiologic needs of a person. Palmar hyperhidrosis in the adolescent period may have an impact on school work and may cause psychological problems. In this study we aim to increase awareness of this disregarded problem. Materials and methods: We explicated the early outcomes of 7 consecutive adolescents, where single port video-assisted thoracoscopic sympathectomy was performed for primary palmar hyperhidrosis. Patients were evaluated for symptom resolution, which was defined as complete dryness, patient satisfaction, operative complications, and compensatory sweating. Results: In total 13 thoracoscopic procedures were done in 7 adolescents, consisting of 4 girls and 3 boys (median age = 16 years). Thoracoscopic sympathectomy achieved immediate complete dryness and all were very satisfied with the outcome of the procedure. Compensatory sweating was defined as mild by 4 (57%) patients. Conclusion: Thoracoscopic sympathectomy is safe and effective for the treatment of primary palmar hyperhidrosis in the adolescent period without any major side effects.Öğe The impact of bone marrow-derived mesenchymal stem cells on experimental testicular torsion in rats(Tubitak Scientific & Technological Research Council Turkey, 2022) Erturk, Ahmet; Demir, Sabri; Gunal, Yasemin Dere; Zengin, Mehmet; Cinar, Miyase; Yildiz, Dincer; Karahan, SiyamiBackground/aim: The aim of this study was to investigate the healing effects of bone marrow-derived mesenchymal stem cells (BM-MSCs) on experimental testicular torsion in rats. Materials and methods: Three groups consisting of 10 Wistar albino rats were created. In Group I, the left testicle was explored and relocated in the scrotum without any attempt to modify it. In Group II, the left testicle underwent torsion for three h and then was detorsed and relocated. In Group III, in addition to torsion and detorsion, BM-MSCs were administered intratesticularly. The rats were sacrificed on the seventh day, and the healing status of the testicles was investigated with histopathological and biochemical analyses. BM-MSC involvement was investigated by immunofluorescence microscopy. Statistical analysis was performed using SPSS 15.0. A p-value < 0.05 was considered statistically significant for all variables. Results: Immunofluorescence microscopy showed that BM-MSCs were located around the Leydig cells in Group III. Under light microscopy, the mean Johnsen Score of Group III was significantly higher than that of Group II (p = 0.035). The interleukin-10 (IL-10) level was significantly higher in Group III compared to Group II (p = 0.003). While the malondialdehyde (MDA) values in Group I (the control group) were lower than in the other groups (p = 0.037), the superoxide dismutase (SOD) values were similar (p = 0.158). Although there was no statistically significant difference between Group II and Group III in terms of MDA, it was lower in Group III. Although the tissue SOD levels were higher in Group III than in Group II, the difference was not statistically significant. Conclusion: This study has demonstrated that BM-MSCs significantly corrected the Johnsen Score and increased anti-inflammatory cytokine levels after testicular torsion. BM-MSCs can be used in testicular torsion as supportive therapy to minimize tissue damage.
