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1.
J Card Surg ; 28(4): 421-6, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23731176

RESUMO

OBJECTIVE: The aim of this study is to assess mid-term outcomes of reduction aortoplasty and wrapping technique which is an alternative method to replacement of the aorta in ascending aortic aneurysms. We aimed to show the efficacy of this technique especially when used for patients with increased perioperative mortality or morbidity due to their concomitant pathologies. MATERIALS AND METHODS: From March 2009 to May 2011, 22 patients underwent reduction aortoplasty and wrapping for ascending aortic aneurysm. The study group consisted of 16 male and six female patients with a mean age of 68 ± 13.1 years. Linear plication with wrapping was performed as concomitant surgery in 20 patients and as a primary procedure in two patients. The diameter of the aorta was measured using a computed tomography scan 12 months after surgery and was compared with the preoperative value. RESULTS: Mean aortic clamp and cardiopulmonary bypass times were 91.0 ± 58.1 and 150.7 ± 80.9 minutes, respectively. Mortality was 9.1%. In no case was the postoperative death related to the aortoplasty procedure. The mean postoperative ascending diameter was 29.5 ± 1.04 mm (vs. preoperative 49.1 ± 4.1 mm, p < 0.001). Mean follow-up time was 17.2 ± 8.88 months. During the follow-up period we observed that there were no findings to suggest redilatation. CONCLUSION: Linear plication with external wrapping is a therapeutic option with promising mid-term results, in carefully selected, high surgical risk patients with an ascending aortic aneurysm.


Assuntos
Aorta/cirurgia , Aneurisma Aórtico/cirurgia , Procedimentos Cirúrgicos Vasculares/métodos , Idoso , Idoso de 80 Anos ou mais , Aorta/patologia , Aneurisma Aórtico/mortalidade , Aortografia , Ponte Cardiopulmonar , Constrição , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Risco , Fatores de Tempo , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Procedimentos Cirúrgicos Vasculares/mortalidade
2.
Ann Vasc Surg ; 25(8): 1118-28, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22023943

RESUMO

BACKGROUND: Abdominal aortic surgery can cause ischemic/reperfusion (I/R) injury not only in the lower limbs but also in remote organs such as kidneys. Venous blood volume exclusion from the inferior vena cava (phlebotomy) or/and mannitol are used as a treatment for I/R injury of kidney in humans, despite the fact that the effectiveness of these treatments is still debated. The aim of this study was to evaluate the effects of phlebotomy or/and mannitol on rat kidneys in a model of lower limbs I/R-induced acute renal injury (ARI). MATERIAL AND METHODS: Thirty male Wistar albino rats were used and divided into five groups: (I) sham-operated group, laparotomy without I/R injury (group [S], n = 6); (II) I/R group, infrarenal aortic cross-clamp was used for lower limbs I/R, 3 hours of ischemia followed by 2 hours of reperfusion (group [I/R], n = 6); (III) I/R + phlebotomy group, identical to group [I/R] except for 1 mL of blood aspiration from the inferior caval vein just after ischemia (group [P], n = 6); (IV) I/R + mannitol-treated group, these rats were subjected to I/R and received a bolus injection of mannitol (group [M], n = 6); and (V) I/R + phlebotomy + mannitol-treated group (group [P + M], n = 6), the same procedures were performed as those described for previous groups. At the end of 2-hour reperfusion, all rats were sacrificed. Both kidneys were harvested for biochemical assay (myeloperoxidase [MPO] and superoxide dismutase [SOD] activities, and malondialdehyde [MDA] and reduced glutathione levels) and for histopathological examination (tubular necrosis and acute inflammation on kidney [ARI score]). RESULTS: Aortic I/R significantly increased the level of MDA (reflecting lipid peroxidation), SOD (enzymatic endogenous antioxidant), and MPO (reflecting neutrophil infiltration) activity (p < 0.05). Phlebotomy or/and mannitol treatments significantly decreased the level of MDA, SOD, and MPO activity and increased glutathione level (nonenzymatic antioxidant in the kidney tissues) (p < 0.05). Histological evaluation of ARI score showed that aortic I/R significantly increased (p value for group [S] versus group [I/R] was 0.012), whereas phlebotomy or/and mannitol treatments significantly decreased tubular necrosis and inflammatory infiltration (p values for group [I/R] versus group [P], [M], and [P + M] were 0.043, 0.043, and 0.003, respectively). CONCLUSION: This experiment clearly indicated that the lower limbs I/R-induced ARI attenuated significantly by phlebotomy or/and mannitol treatments. Phlebotomy plus mannitol is more effective treatment than phlebotomy or mannitol alone in preventing lower limbs I/R-induced ARI in rats. Further clinical studies are required to clarify whether phlebotomy or/and mannitol treatments are beneficial in alleviating of ARI during abdominal aortic surgery.


Assuntos
Injúria Renal Aguda/prevenção & controle , Extremidades/irrigação sanguínea , Rim/efeitos dos fármacos , Manitol/farmacologia , Flebotomia , Traumatismo por Reperfusão/prevenção & controle , Injúria Renal Aguda/etiologia , Injúria Renal Aguda/metabolismo , Injúria Renal Aguda/patologia , Animais , Aorta Abdominal/cirurgia , Terapia Combinada , Constrição , Modelos Animais de Doenças , Glutationa/metabolismo , Rim/metabolismo , Rim/patologia , Masculino , Malondialdeído/metabolismo , Estresse Oxidativo , Peroxidase/metabolismo , Ratos , Ratos Wistar , Traumatismo por Reperfusão/etiologia , Traumatismo por Reperfusão/metabolismo , Traumatismo por Reperfusão/patologia , Superóxido Dismutase/metabolismo , Fatores de Tempo
3.
Surg Today ; 41(7): 955-65, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-21748612

RESUMO

PURPOSE: Mannitol is used as a treatment for ischemia/reperfusion (IR) injury of various organs in humans, despite the fact that its effectiveness in vivo is still disputed. The purpose of this study was to determine the effects of mannitol on acute lung injury (ALI) induced by infrarenal aortic occlusion. METHODS: Male Wistar-albino rats were allocated into five groups: (i) sham-operated group, which received a laparotomy without IR injury (n = 12); (ii) IR group, which received 3 h of ischemia followed by 2 h of reperfusion (n = 12); (iii) IR + inferior caval phlebotomy (ICP) group, which was identical to group 2 except for 1 ml of blood aspiration from the inferior caval vein (n = 12); (iv) IR + mannitol-treated group, for which rats were subjected to IR and received a bolus injection of mannitol (n = 12); and (v) IR + ICP + mannitol-treated group, which underwent the same procedures as described for the previous groups. Arterial blood gas parameters were studied and bronchoalveolar lavage (BAL) was performed. Evans blue dye was injected into half of the rats. We biochemically assessed the degree of pulmonary tissue injury by investigating oxidative stress markers and enzymatic and nonenzymatic antioxidant markers, and evaluated ALI by establishing pulmonary leukosequestration and ALI scoring, histopathologically. Pulmonary edema was estimated by using Evans blue dye extravasation and wet/dry weight ratios. RESULTS: Hypertonic mannitol treatment significantly reduced oxidative stress markers, and significantly increased enzymatic and nonenzymatic antioxidant markers in the lung tissues (P < 0.05). Arterial blood gas parameters were significantly ameliorated (P < 0.05), the BAL cytology was significantly better (P < 0.05), pulmonary leukosequestration and ALI scores were significantly decreased (P < 0.05), and pulmonary edema was significantly alleviated (P < 0.05) by mannitol administration. CONCLUSION: This study clearly showed that mannitol treatment significantly attenuated the aortic IR-induced ALI. Further clinical studies are required to clarify whether mannitol has a useful role in ALI during surgeries in which IR-induced organ injury occurs.


Assuntos
Injúria Renal Aguda/tratamento farmacológico , Aorta Abdominal/patologia , Diuréticos Osmóticos/uso terapêutico , Manitol/uso terapêutico , Artéria Renal/patologia , Traumatismo por Reperfusão/complicações , Injúria Renal Aguda/patologia , Animais , Biomarcadores , Glutationa , Masculino , Malondialdeído , Neutrófilos , Estresse Oxidativo , Peroxidase , Edema Pulmonar , Ratos , Ratos Wistar , Espécies Reativas de Oxigênio , Superóxido Dismutase
4.
Acta Cardiol ; 61(1): 89-94, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16485738

RESUMO

OBJECTIVE: The purpose of this study was to evaluate the influence of preserved integrity of pleura on postoperative bleeding and respiratory function in patients undergoing coronary artery bypass grafting (CABG). METHODS AND RESULTS: Seventy-two CABG patients who received pedunculated IMA graft without opening the pleura (group of intact pleura, group IP) between July 2002 and September 2004 were matched to 72 CABG patients who received pedunculated IMA graft with opened pleura (group of opened pleura, group OP). To match the patients with IP and unique patients with OP, logistic regression was used to develop a propensity score. The C statistic for this model was 0.79. Patients with IP were matched to unique patients with OP with an identical 5-digit propensity score. If this could not be done, we proceeded to a 4-, 3-, 2-, or 1-digit match. Patients characteristics were well matched. There were no differences in preoperative and peroperative variables between the groups. The incidence of postoperative pleural effusion and thoracentesis were significantly lower in group IP than group OP (pleural effusion in 15.2 versus 30.5%; p = 0.029, thoracentesis in 5.5 versus 18.5%; p = 0.036). Other pulmonary complications such as prolonged ventilation, reintubation, pneumothorax, atelectasis, diaphragmatic paralysis were similar in both groups. Patients with IP had significantly lower blood loss (520 versus 870 ml; p < 0.001) and whole blood unit transfusion (26.3 versus 41.6%, p = 0.036). Also, intensive care unit and hospital stay were similar in both groups. CONCLUSIONS: Meticulous internal mammary artery harvesting and preservation of the pleural integrity significantly reduces postoperative bleeding and pleural effusion.


Assuntos
Ponte de Artéria Coronária , Hemorragia/etiologia , Pneumopatias/etiologia , Pleura/cirurgia , Derrame Pleural/etiologia , Complicações Pós-Operatórias/etiologia , Distribuição de Qui-Quadrado , Feminino , Hemorragia/epidemiologia , Mortalidade Hospitalar , Humanos , Incidência , Anastomose de Artéria Torácica Interna-Coronária , Modelos Logísticos , Pneumopatias/epidemiologia , Masculino , Derrame Pleural/epidemiologia , Complicações Pós-Operatórias/epidemiologia , Estudos Prospectivos , Testes de Função Respiratória , Estatísticas não Paramétricas
5.
Tex Heart Inst J ; 33(2): 107-10, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16878608

RESUMO

In 37 Wistar albino rats, we investigated the effects of topical vancomycin on deep sternal wound infection caused by methicillin-resistant Staphylococcus aureus. Partial median sternotomy was performed under sterile conditions. Group I (n=6) was the sham, and group II (n=7) was the control. Group III (n=8) received topical vancomycin, group IV (n=8) received systemic vancomycin, and group V (n=8) received topical and systemic vancomycin (combined). Rats in groups II through V were inoculated with 0.5 mL x 10(8) CFU/mL methicillin-resistant S. aureus in the mediastinum and sternum. No medication was given to groups I and II. Twenty-four hours after surgery, 40 mg/kg/day vancomycin was given topically in group III; systemically in group IV; and topically and systemically in group V After 7 days, smear samples from the mediastinum and tissue cultures from the sternum were obtained. We found 5.00 +/- 0 CFU/mL microorganisms in the mediastinum in group II, 1.90 +/- 1.70 in group III, 3.33 +/- 0.48 in group IV and 1.70 +/- 1.08 in group V. The quantity of microorganisms per gram of tissue in the sternum was 736 +/- 0.23 in group II, 6.01 +/- 0.33 in group III, 5.81 +/- 0.81 in group IV and 3.99 +/- 2.47 in group V The quantity of microorganisms was less in the 3 treatment groups than in the control group (P < 0.05). We conclude that topical plus systemic vancomycin treatment might be more effective in patients with deep sternal wound infections caused by methicillin-resistant S. aureus.


Assuntos
Antibacterianos/administração & dosagem , Infecções Estafilocócicas/tratamento farmacológico , Infecção da Ferida Cirúrgica/tratamento farmacológico , Vancomicina/administração & dosagem , Administração Tópica , Animais , Infusões Intravenosas , Masculino , Resistência a Meticilina , Ratos , Ratos Wistar , Staphylococcus aureus/efeitos dos fármacos , Células-Tronco , Esterno/microbiologia , Esterno/cirurgia , Infecção da Ferida Cirúrgica/microbiologia
6.
Gene ; 585(2): 241-6, 2016 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-27048831

RESUMO

Recent researches have demonstrated improved survival in oncologic patients treated with low molecular weight heparins (LMWHs) which are anticoagulant drugs. We evaluated "second generation" LMWH bemiparin and its in vitro anti-tumor effects on HepG2 hepatocellular carcinoma and MIA PaCa-2 cancer cells. The aim of the study is to investigate anti-cancer mechanism of bemiparin in HepG2 and Mia-Paca-2 cancer cells. Cytotoxic effects of bemiparin were determined by XTT assay. IC50 dose of bemiparin was found to be 200 IU/mL in the 48th hour in the MiaPaCa-2 cell line and 50 IU/mL in the 48th hour in the HepG2 cell line. CCND1 (cyclin D1), CDK4, CDK6, p21, p16, p53, caspase-3, caspase-9, caspase-8, Bcl-2, BID, DR4, DR5, FADD, TRADD, Bax, gene mRNA expressions were evaluated by Real-time PCR. Real-time PCR analysis showed that CCND1 expression was reduced in HepG2 dose the group cells when compared with the control group cells and p53, caspase-3, caspase p21, caspase-8 and expressions were increased in the dose group cells when compared with the control group cells. CCND1, CDK4 and CDK6 expressions were reduced in MIA PaCa-2 dose group cells when compared with the control group cells and p53 expression was increased in the dose group cells when compared with the control group cells. Other expressions of genes were found statistically insignificant both of cell lines. It was found that bemiparin in HepG2 and MIA PaCa-2 cells suppressed invasion, migration, and colony formation by using matrigel invasion chamber, and colony formation assay, respectively. In conclusion, it is thought that bemiparin indicates anti-tumor activity by affecting cell cycle arrest, apoptosis, invasion, migration, and colony formation on cancer cells.


Assuntos
Antineoplásicos/farmacologia , Heparina de Baixo Peso Molecular/farmacologia , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Genes cdc/efeitos dos fármacos , Humanos
7.
BMC Infect Dis ; 5: 91, 2005 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-16242027

RESUMO

BACKGROUND: The aim of the study was to investigate the in vivo efficacy of local and systemic antibiotic prophylaxis in the prevention of Staphylococcus (S.) epidermidis graft infection in a rat model and to evaluate the bacterial adherence to frequently used prosthetic graft materials. METHODS: Graft infections were established in the subcutaneous tissue of 120 male Wistar rats by implantation of Dacron/ePTFE grafts followed by topical inoculation with 2 x 10(7) CFUs of clinical isolate of methicillin-resistant S. epidermidis. Each of the graft series included a control group, one contaminated group that did not receive any antibiotic prophylaxis, two contaminated groups that received systemic prophylaxis with teicoplanin or levofloxacin and two contaminated groups that received teicoplanin-soaked or levofloxacin-soaked grafts. The grafts were removed 7 days after implantation and evaluated by quantitative culture. RESULTS: There was significant bacterial growth inhibition in the groups given systemic or local prophylaxis (P < 0.05). Methicillin-resistant S. epidermidis had greater affinity to Dacron graft when compared with ePTFE graft in the untreated contaminated groups (P < 0.05). CONCLUSION: The study demonstrated that the usage of systemic or local prophylaxis and preference of ePTFE graft can be useful in reducing the risk of vascular graft infections caused by staphylococcal strains with high levels of resistance.


Assuntos
Antibacterianos/administração & dosagem , Antibacterianos/farmacologia , Antibioticoprofilaxia , Prótese Vascular/microbiologia , Infecções Relacionadas à Prótese/prevenção & controle , Infecções Estafilocócicas/prevenção & controle , Staphylococcus epidermidis/efeitos dos fármacos , Animais , Implante de Prótese Vascular , Levofloxacino , Masculino , Resistência a Meticilina , Ofloxacino/administração & dosagem , Ofloxacino/farmacologia , Polietilenotereftalatos , Politetrafluoretileno , Ratos , Ratos Wistar , Teicoplanina/administração & dosagem , Teicoplanina/farmacologia
8.
Int Semin Surg Oncol ; 2: 21, 2005 Oct 19.
Artigo em Inglês | MEDLINE | ID: mdl-16236161

RESUMO

OBJECTIVE: Various techniques to reduce air space after pulmonary lobectomy especially for lung cancer have been an important concern in thoracic surgical practice. The aim of this study was to assess the effectiveness of Botulinum toxin A (BTX-A) injection into the diaphragm to reduce air space after right lower pulmonary lobectomy in an animal model. METHODS: Twelve male New Zealand rabbits were randomly allocated into two groups. All animals underwent right lower lobectomy. Then, normal saline of 0,1 ml and 10 units of 0,1 ml Botulinum toxin type A were injected into the muscular part of the right hemidiaphragm in control (n = 6) and BTX-A groups (n = 6) respectively. Residual air space and diaphragmatic elevation were evaluated with chest X-ray pre- and postoperatively. Diaphragmatic elevation was measured as a distance in millimetre from the line connecting the 10th ribs to the midpoint of the right hemidiaphragm. RESULTS: The mean diaphragmatic elevation in BTX-A and control groups were 7.0 +/- 2.5 and 1.3 +/- 1.2 millimetres respectively. Diaphragmatic elevations were significantly higher in BTX-A group (p = 0.0035). CONCLUSION: Intraoperative Botulinum toxin type A injection may reduce postlobectomy spaces effectively via hemidiaphragmatic paralysis in rabbits. Further studies are needed to validate the safe use of Botulinum toxin type A in human beings.

9.
Tex Heart Inst J ; 40(5): 612-4, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24391339

RESUMO

Arteriovenous fistula is defined as an abnormal communication between the arterial and venous systems. The complexity of congenital arteriovenous malformations makes treatment challenging. We present the case of a 23-year-old woman who had a complex congenital arteriovenous malformation in her left leg and a history of 2 unsuccessful coil-embolization procedures. We ligated all the feeding arteries of the arteriovenous malformation in the region of the superficial femoral artery, and the surgery was successful without sequelae. The patient returned 2 years later with thrombosis of the great saphenous vein and underwent a second operation. The thrombosed vein and all varicosities were excised successfully. Surgery can be an effective method for correcting complex congenital arteriovenous malformations, especially in the lower limbs. A 2-staged surgical approach like ours might be a good option in suitable patients.


Assuntos
Malformações Arteriovenosas/cirurgia , Perna (Membro)/irrigação sanguínea , Procedimentos Cirúrgicos Vasculares/métodos , Angiografia , Anastomose Arteriovenosa , Malformações Arteriovenosas/diagnóstico , Feminino , Artéria Femoral/anormalidades , Artéria Femoral/cirurgia , Seguimentos , Humanos , Veia Safena/anormalidades , Veia Safena/cirurgia , Ultrassonografia Doppler em Cores , Adulto Jovem
13.
Tex Heart Inst J ; 36(2): 152-3, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19436812

RESUMO

Jean-Marc Gaspard Itard, a student of René Laennec's, first recognized pneumothorax in 1803, and Laennec himself described the full clinical picture of the condition in 1819. Treatment of pneumothorax was not begun as a standard procedure until World War II, but we think that Serefeddin Sabuncuoglu recognized the condition and applied treatment in the 15th century.Sabuncuoglu (1385-1470) was a surgeon who lived in Amasya (in Anatolia). In 1465, he completed Cerrahiyyetül Haniyye (Imperial Surgery), the 1st illustrated surgical textbook in the Turkish-Islamic medical literature. We describe the highlights of the book's recommendations concerning treatment of thoracic trauma, particularly of pneumothorax. We reproduce 2 of the colored miniature illustrations and add our comments regarding the advice of Sabuncuoglu. Most notably, he advocated "mihceme," a cupping therapy, as a simple technique of thoracic aspiration.


Assuntos
Pneumotórax/história , Procedimentos Cirúrgicos Torácicos/história , História do Século XV , Humanos , Ilustração Médica/história , Pneumotórax/cirurgia , Turquia
14.
Circ J ; 72(10): 1709-11, 2008 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-18728341

RESUMO

An extremely rare case of myxomas originating from the mitral leaflets was diagnosed in a 64-year-old man presented with a history of exertion dyspnea and palpitations. Two masses originating from the anterior and posterior mitral leaflets in the left ventricular (LV) cavity, causing LV outflow obstruction, were detected by echocardiography. The myxomas were successfully removed with the mitral leaflets via left atriotomy and mitral valve replacement. No embolic events occurred in the preoperative or postoperative period. In this article, we wanted to present.


Assuntos
Mixoma/diagnóstico , Mixoma/cirurgia , Dor no Peito/diagnóstico , Dispneia/etiologia , Eletrocardiografia , Ventrículos do Coração/diagnóstico por imagem , Ventrículos do Coração/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Valva Mitral/diagnóstico por imagem , Valva Mitral/cirurgia , Insuficiência da Valva Mitral/complicações , Insuficiência da Valva Mitral/diagnóstico por imagem , Insuficiência da Valva Mitral/cirurgia , Esterno/cirurgia , Ultrassonografia
15.
J Card Surg ; 22(2): 160-2, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17338758

RESUMO

Entrapment of coronary angioplasty hardware is one of the rare complications of percutaneous coronary artery interventions. We reported herein a case of 58-year-old man with an entrapped balloon catheter and guidewire within the right coronary artery during the application of a conventional balloon angioplasty for in-stent restenosis. Surgical removal of the entrapped balloon catheter and guidewire was performed successfully with a coronary artery bypass grafting to the affected vessel. The application of the balloon angioplasty for in-stent restenosis requires every caution against such type of complications.


Assuntos
Angioplastia Coronária com Balão/efeitos adversos , Angioplastia Coronária com Balão/instrumentação , Reestenose Coronária/cirurgia , Stents/efeitos adversos , Angina Instável/terapia , Angiografia Coronária , Ponte de Artéria Coronária , Reestenose Coronária/diagnóstico por imagem , Reestenose Coronária/etiologia , Reestenose Coronária/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Reoperação
16.
J Artif Organs ; 10(3): 177-80, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17846717

RESUMO

Because slime-forming microorganisms are the major causative agents of graft infections, we aimed to investigate bacterial adherence in slime-forming and nonslime-forming Staphylococcus aureus and to determine the role of neuraminidase (NANase) on adherence to gelatin-impregnated polyester fiber graft fabric. An in vitro model was developed to quantitatively measure bacterial adherence to the surface of the graft. The grafts were divided into two groups - those colonized with slime-forming S. aureus and those colonized with nonslime-forming S. aureus. The grafts were put into sterile tubes and human plasma was instilled and incubated at 37 degrees C to perform fibrin deposition on the grafts. After 48 h of incubation, grafts were drained and inoculated with slime-forming or nonslime-forming S. aureus in triptic soy broth in the presence or absence of NANase. Following 36 h of incubation at 36 degrees C, grafts were vortexed and cultured to perform a colony count. Bacterial counts were expressed as total colony-forming units per square centimeter of graft. Slime-forming S. aureus had greater affinity with the graft compared with nonslime-forming S. aureus (P < 0.05). The adherence of slime-forming S. aureus was impaired by NANase treatment (P < 0.001) but NANase treatment of nonslime-forming S. aureus did not change the adherence to the graft (P > 0.05). These results show that slime plays an important role in the pathogenesis of vascular graft infection. Adherence of slime-forming S. aureus can be decreased by NANase treatment. This may have implications for the development of neuraminidase-embedded vascular grafts to diminish biomaterial-related infections.


Assuntos
Aderência Bacteriana/efeitos dos fármacos , Biofilmes/efeitos dos fármacos , Prótese Vascular/microbiologia , Neuraminidase/farmacologia , Staphylococcus aureus/efeitos dos fármacos , Análise de Variância , Contagem de Colônia Microbiana , Gelatina , Humanos , Neuraminidase/administração & dosagem , Poliésteres , Infecções Relacionadas à Prótese/prevenção & controle , Infecções Estafilocócicas/prevenção & controle , Staphylococcus aureus/crescimento & desenvolvimento , Staphylococcus aureus/fisiologia
17.
J Surg Res ; 139(2): 170-5, 2007 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-17292421

RESUMO

BACKGROUND: In this report we describe the in vivo antibacterial activity of linezolid in an experimental graft infection model in rats and compare it with teicoplanin. The objective of this study was also to determine the effects of the interaction of linezolid when it was combined with rifampicin and test this effect against strains of methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis. MATERIALS AND METHODS: Graft infections were established in the subcutaneous tissue of 130 Wistar rats by implantation of Dacron grafts followed by a topical inoculation with 2 x 10(7) CFU of clinical isolates of MRSA and MRSE. The study included a control group and six groups for each of the staphylococcal strains: an inoculated group that did not receive any antibiotic prophylaxis, two inoculated groups that received intraperitoneal prophylaxis with teicoplanin or linezolid alone, an inoculated group that received rifampicin-soaked grafts, and two inoculated groups that received a combination prophylaxis consisting of intraperitoneal teicoplanin or linezolid and rifampicin-soaked grafts. RESULTS: There was a reduction in the quantitative bacterial graft cultures in all prophylaxis groups when compared with inoculated control groups. There was not a statistically significant difference between linezolid and teicoplanin prophylaxis groups. The best results were obtained by a combination of rifampicin-soaked grafts with linezolid or teicoplanin. CONCLUSIONS: We found no evidence to suggest that linezolid differs from teicoplanin regarding effectiveness in the prevention of prosthetic vascular graft infection. Linezolid plus rifampicin and teicoplanin plus rifampicin are demonstrated to be valuable prophylactic regimens.


Assuntos
Acetamidas/farmacologia , Anti-Infecciosos/farmacologia , Prótese Vascular , Resistência a Meticilina , Oxazolidinonas/farmacologia , Infecções Relacionadas à Prótese/prevenção & controle , Rifampina/farmacologia , Infecções Estafilocócicas/prevenção & controle , Animais , Antibacterianos/farmacologia , Sinergismo Farmacológico , Linezolida , Masculino , Ratos , Ratos Wistar , Staphylococcus aureus/efeitos dos fármacos , Staphylococcus aureus/fisiologia , Staphylococcus epidermidis/efeitos dos fármacos , Staphylococcus epidermidis/fisiologia , Teicoplanina/farmacologia
18.
J Surg Res ; 140(1): 20-6, 2007 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-17397869

RESUMO

BACKGROUND: Abdominal aortic surgery can cause ischemic/reperfusion (I/R) injury in not only the lower extremities, but also in the remote organs and tissues such as lungs, kidneys, heart, and liver during abdominal aortic surgery. It can result in mortality and morbidity because of the remote organ injury in early postoperative period. In this study, we investigate the effects of iloprost and vitamin C on the kidney remote organ damage after I/R following abdominal aortic surgery. MATERIAL AND METHODS: Thirty-four adult male Wistar rats were used and divided into five groups. I/R was studied infrarenally in the abdominal aorta following a median laparotomy. The left kidney was excised immediately following the laparotomy in group I (n = 6, normal group). Group II (n = 6) was the sham group. Group III (n = 6, control group) was subjected to 3 h of ischemia followed by an hour of reperfusion. Group IV (n = 8) was given iloprost 20 ng/kg/min during I/R period before aortic-clamping. Group V (n = 8) was given vitamin C 100 mg/kg during I/R period before aortic-clamping. Arterial blood samples were obtained to determine the levels of blood pH, pO(2) (mmHg), pCO2 (mmHg), HCO(3) (mmol/L), and plasma malondialdehyde (MDA, nmol/mL) at the end of reperfusion period in all groups. The left kidneys were used for remote measurements of tissue MDA (nmol/g.w.t) and scored by histopathological examination for acute inflammation. RESULTS: While the arterial blood pO(2) and HCO(3) levels significantly increased, the plasma and renal parenchymal MDA levels significantly decreased in both group IV and group V when compared to group III (P < 0.05). Histopathological and acute inflammation scores statistically decreased in both group IV and V compared with group III (P < 0.05). Although MDA levels, histopathologic and acute inflammation scores in group V were lower than group IV, the differences were not statistically significant (P > 0.05). CONCLUSION: Both iloprost and vitamin C decreased remote organ damage on the kidney after I/R of lower extremities in the rat model. However, vitamin C is more effective than iloprost in preventing postoperative renal dysfunction.


Assuntos
Antioxidantes/farmacologia , Ácido Ascórbico/farmacologia , Iloprosta/farmacologia , Nefropatias/prevenção & controle , Traumatismo por Reperfusão/tratamento farmacológico , Vasodilatadores/farmacologia , Animais , Aorta Abdominal/cirurgia , Atrofia , Dióxido de Carbono/sangue , Membro Posterior/irrigação sanguínea , Rim/irrigação sanguínea , Rim/efeitos dos fármacos , Rim/patologia , Nefropatias/etiologia , Nefropatias/patologia , Masculino , Malondialdeído/sangue , Oxigênio/sangue , Ratos , Ratos Wistar , Traumatismo por Reperfusão/complicações , Traumatismo por Reperfusão/patologia
19.
J Card Surg ; 21(3): 296-7, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16684067

RESUMO

OBJECTIVES: Congenitally corrected transposition of great arteries with dextrocardia is an extremely rare lesion in adulthood. This group of patients does not live long enough for atherosclerotic coronary artery disease processes, because of existing comorbid anomalies. METHODS: We report a 47-year-old man with isolated congenitally corrected transposition of great arteries, dextrocardia, and athersclerotic coronary artery disease. The patient underwent coronary artery revascularization with cardiopulmonary bypass. The free left internal mammary artery (LIMA) was grafted to the tiny left anterior descending artery (LAD), and the reversed saphenous vein Y graft was anastomosed to the posterior descending and posterolateral branches of the morphologic right coronary artery. RESULTS: The patient recovered uneventfully. He is alive and well 24 months after the surgery. CONCLUSIONS: To our knowledge, the present case is the first congenitally corrected transposition of great arteries with dextrocardia treated with grafted coronary artery bypass. Early and full revascularization is very important for the systemic right ventricle exposed to a systemic workload. The vessel pathologies and technical details of this unusual case are discussed in this paper.


Assuntos
Doença das Coronárias/cirurgia , Dextrocardia/complicações , Anastomose de Artéria Torácica Interna-Coronária/métodos , Transposição dos Grandes Vasos/complicações , Doença das Coronárias/complicações , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade
20.
J Card Surg ; 21(2): 172-5, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16492280

RESUMO

OBJECTIVE: De Vega annuloplasty is one of the most effective methods used in surgical correction of functional tricuspid regurgitation (FTR). Physiologic annular motions are protected by De Vega annuloplasty. However, recurrent tricuspid regurgitation secondary to Bowstring (Guitar string) phenomenon may be seen after De Vega annuloplasty as a result of gliding (jiggle) effect. The aim of this new annuloplasty was to prevent Bowstring phenomenon seen in De Vega annuloplasty. METHODS: Twenty-five patients with severe FTR secondary to the left-sided valvular heart disease were included in this study. Modified semicircular constricting annuloplasty (Sagban's annuloplasty): The procedure is performed utilizing 0 and 2-0 polypropylene sutures. At first, 0 and 2-0 polypropylene sutures are fixed and knotted at anteroseptal and posteroseptal comissural regions (named as anchoring points). 2-0 Polypropylene sutures which come from anchoring points in clockwise and counterclockwise direction are used to encircle the free wall annulus as well as 0 polypropylene sutures in spiral fashion (spiral annulary suture technique). When both sutures get to the anteroposterior comissural region (tying point), they are passed through plastic snares. After the annuloplasty is completed, with the heart beating and the pulmonary artery clamped, competency of the valve is tested by injecting saline into the right ventricular chamber before the adjusting suture is tied. In this annuloplasty, 0 polypropylene sutures are used for reduction and constriction, 2-0 polypropylene sutures are used for the fixation of 0 polypropylene sutures in annular level. RESULTS: FTR improved totally in 16 patients (66.7%), 4 patients (16.7%) had first degree, 3 patients (12.5%) had second degree, and only 1 patient (4.2%) had third degree residual tricuspid regurgitation in an average follow-up period of 17.8 months. One patient died from low cardiac output in early postoperative period. CONCLUSION: There is no risk of recurrent regurgitation secondary to Bowstring phenomenon in this alternative annuloplasty technique and this annuloplasty is cost-effective and performed easily.


Assuntos
Procedimentos Cirúrgicos Cardíacos/métodos , Técnicas de Sutura , Insuficiência da Valva Tricúspide/cirurgia , Valva Tricúspide/cirurgia , Adulto , Ponte Cardiopulmonar , Ecocardiografia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Índice de Gravidade de Doença , Fatores de Tempo , Resultado do Tratamento , Valva Tricúspide/diagnóstico por imagem , Insuficiência da Valva Tricúspide/diagnóstico por imagem , Insuficiência da Valva Tricúspide/fisiopatologia , Função Ventricular
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