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1.
J Burn Care Res ; 2024 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-38630547

RESUMO

Pulmonary insufficiency is the primary cause of death in cases of major burns accompanied by inhalation damage. It is important to consider the impact on the face and neck in flame burns. Early implementation of bronchial hygiene measures and oxygenation treatment in inhalation injury can reduce mortality. This case series presents the effects of high-flow nasal oxygen application on patient outcomes in major burns and inhalation injury. This report discusses three different patients. One patient, a 29-year-old male with 35% TBSA burns, received high-flow nasal oxygen (HFNO) treatment for inhalation injury on the sixth day after the trauma. After 72 hours of HFNO application, the patient's pulmonary symptoms improved. The second patient had 60% TBSA burns and developed respiratory distress symptoms on the fifth day after the trauma. After 7 days of HFNO application, all symptoms and findings of acute respiratory distress syndrome (ARDS) were resolved. HFNO has used for the treatment of ARDS releated to major burn ( 60% of burned TBSA) 28 years-old patient and improvement was achived. The use of HFNO in pulmonary insufficiency among burn patients has not been reported previously. This series of patient cases demonstrates the successful application of HFNO in treating inhalation injury and burn-related ARDS. However, further clinical studies are necessary to increase its clinical utilization.

2.
J Burn Care Res ; 45(1): 98-103, 2024 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-37638523

RESUMO

The aim of this study is to investigate the contribution of concurrent physical therapy to the preservation of hand function in patients with hand burns. This retrospective cohort study included the records of adult patients who presented with hand burns between July 1, 2020, and December 1, 2021. A total of 67 of 1578 burn patients who attended the clinic were included in this study. The patients' age, sex, total BSA with burns, causative agent, depth of burn on the hand, right or left hand, location of the burned area on the hand, treatment applied, healing time of the burn on the hand, limitation of movement, the joint restrictions, contractures, and compliance with physical therapy were assessed and recorded. Among the 67 patients included, 82.1% (n = 55) had no limitation in terms of their joint range of motion, whereas 17.9% (n = 12) had a limitation of movement in their finger joints. When the prevalence of movement limitation was examined by gender, such limitation was found to be more common in females (P = .041). Moreover, contractures were found to occur more frequently in patients with full-thickness burns (P = .032). It was also found that the limitation of movement was more severe in patients with skin grafts (P = .044). In addition, it was observed that the recovery time of the burn area was longer in those patients who had movement limitations (P = .004). In this study, we found that applying early physical therapy to patients after burn injuries facilitated the recovery of hand functions.


Assuntos
Queimaduras , Contratura , Traumatismos da Mão , Medicina Física e Reabilitação , Adulto , Feminino , Humanos , Estudos Retrospectivos , Queimaduras/complicações , Traumatismos da Mão/terapia , Traumatismos da Mão/complicações
3.
Burns ; 49(7): 1654-1662, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37280139

RESUMO

AIM: Oxygen is required for cell migration into the scaffold and for the survival of the overlying graft in the use of a single-layer scaffold. In the absence of diffusion from the avascular wound base, such as in areas above the bone/tendon, oxygen delivery from the lateral edges of the scaffold is important. This study compared the oxygen permeability of skin scaffolds, currently commercially available in Turkey (Nevelia®, MatriDerm®, and Pelnac®), in the lateral plane. MATERIALS AND METHODS: To measure oxygen permeability, an interconnected closed system was created. Oxygen permeability was evaluated based on the color change that occurred as a result of the reaction of iron with oxygen. After the dermal matrices placed in the closed system were exposed to oxygen, the color change on the surface of the dermal matrices was measured, and electron microscopic images were recorded to compare deformation before and after the procedure. RESULTS: Two scaffolds did not show deformation after the procedure while Pelnac® had minimal deformation. The oxygen rates on the nitrogen side of the test apparatus were found to be 29%, 34%, and 27% for Nevelia®, MatriDerm®, and Pelnac®, respectively; and the oxygen transmission lengths (length of color change) of these scaffolds in the lateral plane were 1, 2, and 0.5 cm, respectively. CONCLUSION: Although none of the scaffolds showed significant deformation, and all continued to exhibit their scaffold properties after the procedure, MatriDerm® was determined to be the most suitable scaffold for use in avascular areas, with a 2-cm oxygen transmission length in terms of lateral oxygenation.


Assuntos
Queimaduras , Pele Artificial , Humanos , Cicatrização , Transplante de Pele/métodos , Sobrevivência de Enxerto , Pele
4.
Wound Manag Prev ; 69(1): 32-48, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-37014935

RESUMO

BACKGROUND: Pain management is important for patient comfort in the treatment of partial-thickness burn wounds. The topical application of ibuprofen provides analgesic and anti-inflammatory effects. PURPOSE: To evaluate the efficacy of ibuprofen-containing foam dressing in partial-thickness burns. METHODS: The study included 50 patients with superficial second-degree burn wounds. Ibuprofen-containing foam dressing was used in 25 patients and paraffin gauze dressing in 25 patients as controls. The visual analogue score (VAS) was evaluated 30 min after dressing. On the 90th day following wound healing, the Vancouver scar scale (VSS) was administered to the patients to evaluate healing and scar formation. RESULTS: The rate of wound healing significantly increased in the study (ibuprofen-containing foam dressing) group compared to control group (8.84±2.97 vs 11.32±4.39, P = 0.010), and the frequency of dressing change significantly decreased in the study group vs control group (1.36±0.49 vs 5.68±2.07, P = 0.000). The oral analgesic needs and VAS scores of the patients were also found to be statistically significantly lower in the study group (5.04 ± 2.44) than for the control group (8.64 ± 1.29, P = 0.000). In the evaluation of the VSS, the total score was lower in the study group, but no statistically significant difference was observed. CONCLUSION: The use of ibuprofen-containing foam dressing in patients with superficial second-degree burns eligible for outpatient follow-up provides effective pain management and increases patient comfort. It does not have a negative effect on wound healing. We consider that ibuprofen-containing foam dressing can be safely used in partial-thickness burns.


Assuntos
Queimaduras , Lesões dos Tecidos Moles , Humanos , Ibuprofeno/farmacologia , Ibuprofeno/uso terapêutico , Cicatriz/patologia , Estudos Prospectivos , Manejo da Dor , Cicatrização , Queimaduras/complicações , Queimaduras/tratamento farmacológico
5.
Wounds ; 35(1): E22-E28, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36749994

RESUMO

INTRODUCTION: Adipose-derived stem cells are multipotent precursor cells with the ability to differentiate into cell lineages associated with the regeneration of tissues. OBJECTIVE: The authors investigated the efficacy of AMHAT with 3D bioprinting technology in DFU. MATERIALS AND METHODS: Twenty patients were enrolled in a clinical prospective interventional pilot study. The primary endpoint was a reduction in the size of DFU, and the secondary endpoints were the epithelialization rate and amount of granulation of wound bed at weekly assessments. A bioprinter was used to produce AMHAT in the customized shape of DFU. The data were obtained using photography and computerized digital surface calculation. RESULTS: The mean wound size at the time of hospitalization was 7.529 cm2. All but one of the wounds were completely epithelialized at the ninth week. The mean wound areas decreased at weekly assessments for the first 7 weeks of treatment compared to the pre-application. When the mean decrease in the wound size was compared between consecutive weeks, there were decreases at each of the first 7 weeks. The mean time to the complete closure was 32.20±23.862 days. CONCLUSION: These data indicate that AMHAT is beneficial in terms of ease of application, significant decrease in the wound surface area, no scarring compared to grafting, and full healing times.


Assuntos
Diabetes Mellitus , Pé Diabético , Humanos , Estudos Prospectivos , Projetos Piloto , Cicatrização , Tecido Adiposo/transplante
6.
Int J Low Extrem Wounds ; 22(1): 93-102, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36069057

RESUMO

Advanced modalities are used for wounds where conventional treatment is insufficient in diabetic foot patients. In this study, we investigated the effects of using Epidermal growth factor (EGF) and NPWTmodalities alone or in combination on the frequency and level of amputation. In the retrospective study, which included 286 patients in total, 76 patients were referred with the decision of amputation or amputation was planned during hospitalization. After the treatments, amputation and distalization of amputation were found 73.3% and 33.3% in the conventional treatment patients. While 86.4% amp and 18.2% amp distalization were found in negative pressure wound therapy (NPWT) only patients, this rate was 52.4% and 90.5% in EGF + NPWT patients, 50% and 83.3% in EGF only patients. While amp and distalization rates were found to be significantly better in those receiving only EGF or EGF + NPWT (P = .015, P = .017 respectively for amputation and P = .000 for distalization), no difference was found in those receiving EGF and EGF + NPWT. As a result of our study, although npwt contributed positively to the number and level of amputations compared to conventional treatment, a significant improvement was found in the number and level of amps when EGF was used alone or combined with NPWT. With this result, EGF was thought to be an important treatment modality that should be evaluated in diabetic foot ulcers (DFUs) without amputation decision.


Assuntos
Diabetes Mellitus , Pé Diabético , Tratamento de Ferimentos com Pressão Negativa , Humanos , Fator de Crescimento Epidérmico , Pé Diabético/diagnóstico , Pé Diabético/terapia , Pé Diabético/etiologia , Estudos Retrospectivos , Cicatrização
7.
Wound Manag Prev ; 68(4): 34-43, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35544780

RESUMO

BACKGROUND: Surgical site infections (SSIs) can occur after colorectal surgery. Ionic silver has been used to prevent the development of SSIs. New-generation dressings, defined as total occlusive ionic silver-containing dressings, have been shown to reduce bacterial colonization in SSIs. PURPOSE: To evalute the effect of a silver hydrofiber dressing on the development of SSIs at the abdominal incision after ostomy closure. METHODS: There was a total of 37 eligible patients who underwent temporary ostomy closure. Five patients required an associated intervention during ostomy closure and were excluded. One patient was lost to follow-up. Hence, 32 patients were included in the study. Silver-containing occlusive dressings and conventional dressings were used in patients who underwent ostomy closure. In the control group (n = 16), the wound area was covered with a standard sterile gauze dressing for 24 to 48 hours, and then wound cleansing was performed with 10% povidone iodine, followed by daily dressing replacement with sterile gauze for 5 days. The patients in the study group (n = 16) were treated with a silver-containing hydrofiber dressing, which was not changed for 5 days following application in the operating room. RESULTS: At the end of the 30-day follow-up period, no SSIs were observed in the study group. When the dressing methods applied to the patient groups with and without SSIs were compared, SSIs developed at a higher rate in the control group (n = 4; 26.7%) compared with the study group (n = 0); this result was statistically significant (P = .043). CONCLUSIONS: In this study, the use of a wound care product containing ionic silver reduced the rate of SSIs related to ostomy closure. Multicenter, randomized, clinical studies involving a larger number of patients are needed. In addition, occlusive wound dressings with and without silver should be investigated in further studies.


Assuntos
Estomia , Infecção da Ferida Cirúrgica , Bandagens , Humanos , Projetos Piloto , Estudos Prospectivos , Prata/uso terapêutico , Infecção da Ferida Cirúrgica/prevenção & controle , Cicatrização
8.
Ulus Travma Acil Cerrahi Derg ; 27(6): 677-683, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34710234

RESUMO

BACKGROUND: Prolonged stays and multiple operations in burn management increase the risk of transmission. We would like to discuss our experience in hospitalized burn patients with Coronavirus disease (covid-19) infection. METHODS: In-patient burns with confirmed COVID-19 infection were studied. Age, gender, burned total body surface area (TBSA), number and sort of operations and dressing changes, intensive care unit stay, ward stay, total length of stay, and morbidity and mortality were analyzed. Medical staff observed for infection. RESULTS: The mean age of the 11 positive patients was 51 (±19.37) years and burned TBSA was 34.36% (±21.97%). Six (54.5%) patients presented with negative polymerase chain reaction (PCR) tests; however, symptoms and findings revealed the illness. Patients underwent 85 operations including hydrosurgery. Totally, 475 dressing changes were done. Respiratory failure caused three mortalities without sepsis. Age, TBSA, and deep dermal burn percent of the mortalities showed no difference. None of the staff and hospitalized other patients had hospital acquired COVID-19 infection. CONCLUSION: Healthcare must continue during pandemics. Awareness, proper usage of personal protective equipment, keeping social distance, and strengthened access control to the clinic are important priorities to avoid viral transmission. The difficulty in PCR negative patients was the confusing effect of burns as most of the laboratory and radiologic findings overlaps with the major burns' consequences. Findings, cannot be explained by the clinical course of burn, should indicate COVID infection. Regarding our results, burn patient treatment routines can be applied safely by competence to focused and re-adopted precautions as there were no hospital acquired COVID-19. Patients must trained for cross-contamination. Healthcare's must prioritize their own health under all situations including pandemics. Updating, the preventive cautions and rigid compliance are a must.


Assuntos
Queimaduras , COVID-19 , Adulto , Idoso , Queimaduras/epidemiologia , Queimaduras/terapia , Humanos , Tempo de Internação , Pessoa de Meia-Idade , Pandemias , Estudos Retrospectivos , SARS-CoV-2
10.
J Breast Health ; 12(1): 9-17, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28331725

RESUMO

OBJECTIVE: There is an increase in the incidence of cancer, and consequently in mortality rates, both in the world and in Turkey. The increase in the incidence and mortality rate of cancer are more prominent in our country as well as in other developing countries. The aim of this workshop was to determine the current status on prevention, screening, early diagnosis and treatment of cancer in our country, to identify related shortcomings, specify solutions and to share these with health system operators, and to aid in implementation of these systems. Developments on palliative care were also evaluated. MATERIALS AND METHODS: The current situation in the practice of clinical oncology, related drawbacks, problems encountered during multidisciplinary approach and their solutions were discussed under several sub-headings during a 3-day meeting organized by the Turkish Ministry of Health (Türkiye Cumhuriyeti Saglik Bakanligi-TCSB) with participation of 16 scientists from Turkey and 6 from abroad, and the conclusions were reported. RESULTS: It is expected that the newly established Turkish Health Institutes Association (Türkiye Saglik Enstitüleri Baskanligi-TÜSEB) and the National Cancer Institute (Ulusal Kanser Enstitüsü) will provide a new framework in the field of oncology. The current positive findings include the increase in the number of scientists who carry out successful trials in oncology both in Turkey and abroad, the implementation of the national cancer registry program by the Cancer Control Department and the breast cancer registry program by the Turkish Federation of Breast Diseases Societies (Türkiye Meme Hastaliklari Dernekleri Federasyonu-TMHDF), and introduction of Cancer Early Diagnosis, Screening, and Training Centers (Kanser Erken Tani, Tarama ve Egitim Merkezi-KETEM) for the application of community-based cancer screening programs. In addition to these, obvious shortcomings related to education, implementation, management and research issues were also determined, and policy and project proposals to address these issues were presented. Collaboration with relevant organizations in the implementation of these studies was supported. CONCLUSION: Both the incidence and mortality rates of cancer are increasing in Turkey. The widespread deficiencies in population-based screening and in effective treatment lead to an increase in delay in diagnosis and mortality. Despite improvements in data recording, screening and treatment over the last 10 years, extensive, organized, population-based screening programs and fully equipped early diagnosis and treatment centers are required. Enhancement of basic cancer epidemiologic, translational, genetic and molecular research studies is essential in our country. Improvements on pain treatment and palliative care of patients with chronic and terminal cancer are also required.

11.
Ulus Travma Acil Cerrahi Derg ; 20(5): 359-65, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25541848

RESUMO

BACKGROUND: Liver is the most frequently injured intraabdominal organ following abdominal trauma. Liver injury in polytraumatized patients can vary from minor contusions to major lacerations and is associated with morbidity and mortality. The objective of this study was to evaluate the outcome of liver injury in polytraumatized patients. METHODS: Only surgically treated 82 patients with liver injury over an eight year period (2005-2013) were included in this study and analyzed retrospectively. Data collected included demographics, laboratory findings, intraoperative findings, operative management, and outcome. The patients were divided into two groups and the mortality and survival data were compared. RESULTS: The overall mortality rate was 18.3% (15 of 82 patients). 34 (41.5%) patients had blunt, forty-eight (48.5%) had penetrating trauma. There were multiple traumas in forty-seven (57%) patients. Forty-seven (57%) patients had total of seventy one coexisting intraabdominal injuries. Forty-six (56.1%) patients had stable and thirty-six (43.9%) had unstable hemodynamics on admission. In mortality group AST, ALT, LDH, APTT, PT, INR, and creatinine levels were high, fibrinogen levels and platelet counts were low on admission. CONCLUSION: Hemodynamic instability, coexisting musculoskeletal and chest injury, high APTT, PT, INR, AST, ALT, LDH levels, and low fibrinogen levels and platelet counts on admission should be considered as predictive factors for mortality.


Assuntos
Traumatismos Abdominais/epidemiologia , Fígado/lesões , Centros de Atenção Terciária/estatística & dados numéricos , Traumatismos Torácicos/epidemiologia , Traumatismos Abdominais/mortalidade , Traumatismos Abdominais/cirurgia , Adulto , Feminino , Humanos , Escala de Gravidade do Ferimento , Fígado/cirurgia , Masculino , Pessoa de Meia-Idade , Traumatismo Múltiplo/epidemiologia , Traumatismo Múltiplo/mortalidade , Traumatismo Múltiplo/cirurgia , Estudos Retrospectivos , Fatores Sexuais , Traumatismos Torácicos/mortalidade , Traumatismos Torácicos/cirurgia , Turquia/epidemiologia , Ferimentos não Penetrantes/epidemiologia , Ferimentos não Penetrantes/mortalidade , Ferimentos não Penetrantes/cirurgia , Ferimentos Penetrantes/epidemiologia , Ferimentos Penetrantes/mortalidade , Ferimentos Penetrantes/cirurgia , Adulto Jovem
12.
Am J Emerg Med ; 32(7): 705-8, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24797305

RESUMO

INTRODUCTION: We aimed to evaluate whether hepatic transaminase levels could predict the presence and severity of liver injury following abdominal trauma. METHODS: We performed a retrospective analysis of 75 surgically treated patients and 21 non-surgically treated patients with liver injury who were managed between 2004 and 2012. We retrieved demographic, laboratory, radiologic, and intraoperative data, as well as surgical procedures and the outcome from the patients' medical records. We compared the findings between patients divided into 2 groups according to the severity of liver injury: group 1, including patients with Grade 1 or 2 liver injuries; and group 2, including patients with grade 3 to 5 liver injury. RESULTS: There were 87 (90.6%) males and 9 (9.4%) females. The mean age was 34 years (range, 17-90 years). The overall mortality rate was 14.6% (n = 14). The injury was blunt in 83 patients (86.5%) and penetrating in 13 patients (13.5%). There were multiple traumas in 60 patients (62.5%). Overall, 43 patients (44.8%) had a total of 61 coexisting intraabdominal injuries. The circulating aspartate aminotransferase, alanine aminotransferase, and lactate dehydrogenase (LDH) levels were significantly higher in group 2 than in group 1. CONCLUSIONS: In patients with abdominal trauma, abnormal hepatic transaminase and LDH levels are associated with liver injury. Alanine aminotransferase ≤76 U/L, aspartate aminotransferase <130 U/L, and LDH ≤410 U/L are predictive of low-grade liver injury, and patients with serum liver levels below these levels can be managed conservatively.


Assuntos
Acidentes por Quedas , Acidentes de Trânsito , Alanina Transaminase/sangue , Aspartato Aminotransferases/sangue , L-Lactato Desidrogenase/sangue , Fígado/lesões , Ferimentos não Penetrantes/sangue , Ferimentos Perfurantes/sangue , Traumatismos Abdominais/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Feminino , Humanos , Fígado/metabolismo , Hepatopatias/sangue , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Estudos Retrospectivos , Índices de Gravidade do Trauma , Adulto Jovem
13.
Ren Fail ; 33(4): 377-81, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21529265

RESUMO

In this study, we aimed to examine the impact of volume status on blood pressure (BP) and on left ventricular mass index (LVMI) in chronic hemodialysis (HD) patients. This study enrolled 74 patients (F/M: 36/38, mean age 53.5 ± 15.3 years, mean HD time 41.5 ± 41 months) that were on HD treatment for at least 3 months. Demographics, biochemical tests, hemogram and C-reactive protein levels, mean interdialytic weight gain (IDWG), mean percentage of ultrafiltration (UF), and intradialytic complications such as hypotension and cramps were determined. Mean values of predialysis and postdialysis BP measurements were recorded a month before echocardiographic examination. On the day after a midweek dialysis session, 24 h ambulatory BP monitoring (ABPM) and echocardiographic examination were made concurrently. The patients were classified into two groups according to volume status: normovolemic (group 1; 14F/24M, mean age 50 ± 16.7 years, mean dialysis time 47.7 ± 47.7 months) and hypervolemic (group 2; 15F/21M, mean age 57.3 ± 12.7 years, mean dialysis time 34.9 ± 32 months). HD duration, IDWG, UF, and interdialytic complication rates were similar between the two groups (p < 0.05). Eleven patients (28.9%) of group 1 and 8 patients (22.2%) of group 2 showed dipper (p = 0.50). Valvular damage was more common in group 2 (p = 0.002). Whereas 33 patients (91.7%) had left ventricular hypertrophy (LVH) in group 2, 21 patients of the group 1 (55.3%) had LVH (p < 0.001). Although LVMI showed a significant positive correlation with cardiothoracic index, predialysis and postdialysis BP, IDWG, UF, daytime and nighttime BP measurements of 24 h ABPM, a significant negative correlation was seen with Kt/V urea and serum albumin levels. In conclusion, increased IDWG and UF and elevated BP are independent predictors of LVH for HD patients. Increased volume status leads to IDWG and elevated BP and eventually causes severe LVMI increases.


Assuntos
Pressão Sanguínea , Volume Sanguíneo , Hipertrofia Ventricular Esquerda/etiologia , Falência Renal Crônica/fisiopatologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Falência Renal Crônica/complicações , Falência Renal Crônica/terapia , Masculino , Pessoa de Meia-Idade , Diálise Renal , Adulto Jovem
14.
Bioprocess Biosyst Eng ; 31(3): 193-205, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18175155

RESUMO

A continuous parallel shaken bioreactor system, combining the advantages of shaken bioreactors with the advantages of continuous fermentation, was specifically manufactured from quartz glass and provides a geometric accuracy of <1 mm. Two different model systems (facultative anaerobic bacterium C. glutamicum, and Crabtree-negative yeast P. stipitis), whose growth behaviour and metabolite formation are affected by dilution rate and oxygen availability, were studied. The transition from non-oxygen to limited conditions as function of the dilution rate could precisely be predicted applying the approach described by Maier et al. (Biochem Eng J 17:155-167, 2004). In addition, the Crabtree-positive yeast S. cerevisiae was simultaneously studied in the continuous parallel shaken bioreactor system and in a conventional 1-L bioreactor, for comparison. Essentially the same results were obtained in both types of bioreactors. However, many more reading points were obtained with the parallel shaken bioreactor system in the same time at much lower consumption of culture media.


Assuntos
Reatores Biológicos , Biotecnologia/métodos , Microbiologia Industrial/métodos , Corynebacterium/metabolismo , Desenho de Equipamento , Fermentação , Glucose/química , Oxigênio/química , Pichia/metabolismo , Saccharomyces cerevisiae/metabolismo , Software , Temperatura
15.
Biotechnol Prog ; 20(6): 1718-24, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15575704

RESUMO

A novel continuous bioreactor system was developed as a shaken culture vessel for the investigation of the growth kinetics and product formation of microorganisms in milliscale. The novel bioreactor system mainly consists of a specially designed 250-mL shake flask with two inlets, one for gas supply and one for medium supply, and one combined outlet on the side of flask for exhaust gas and culture liquid. As a result of the circulating motion of the fermentation broth in the shake flask, the maximum liquid height reaches the edge of the outlet and the fermentation broth is accelerated into the outlet by centrifugal force. Additionally, the excess fermentation broth leaving the culture vessel is continuously driven by the exhaust gas. Because of the small scale and the simple handling it is possible to operate many of these shaken bioreactor vessels simultaneously. By using parallel vessels operated at different dilution rates on the same shaker, the data for a complete biomass over dilution rate (X-D) diagram of a biological culture can be evaluated in an efficient manner, thus saving money, materials, and time. Continuous fermentations of the yeast Saccharomyces cerevisiae H1022 (ATCC 32167) in the shaken bioreactor system and in a conventional stirred tank fermentor showed very similar results.


Assuntos
Reatores Biológicos/microbiologia , Técnicas de Cultura de Células/instrumentação , Etanol/metabolismo , Glucose/metabolismo , Estimulação Física/instrumentação , Reologia/instrumentação , Saccharomyces cerevisiae/fisiologia , Proliferação de Células , Desenho de Equipamento , Análise de Falha de Equipamento , Estudos de Viabilidade , Estimulação Física/métodos , Projetos Piloto , Reologia/métodos
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