Existence of advanced glycation / lipoxidation end-products in parenteral nutrition solutions and effects of infusion conditions on their levels

Abstract Infusion solutions must be stable from the production stage until the infusion stage. Some infusion fluids contain degradation products, known as advanced glycation end products (AGEs); however, it is unknown whether AGEs exist in parenteral nutrition solutions. We aimed to investigate this question and test the effect of infusion conditions on AGE formation in parenteral nutrition solution. Nine parenteral nutrition solutions were supplied by the pharmacy with which we collaborated. To simulate the infusion conditions, the solutions were held in a patient room with standard lighting and temperature for 24 hours. Samples were taken at the beginning (group A) and the end (24th hour, group B) of the infusion period. The degradation products were 3-deoxyglucosone, pentosidine, N-carboxymethyl lysine, and 4-hydroxynonenal, which we investigated by high-performance liquid chromatography-mass spectrometry (LC-MS) and Q-TOF LC/MS methods. Two of four degradation products, 4-hydroxynonenal and N-carboxymethyl lysine, were detected in all samples, and Group B had higher levels of both compounds compared to Group A, who showed that the quantities of these compounds increased in room conditions over time. The increase was significant for 4-hydroxynonenal (p=0.03), but not for N-carboxymethyl lysine (p=0.23). Moreover, we detected in the parenteral nutrition solutions a compound that could have been 4-hydroxy-2-butynal or furanone

Association between early parenteral nutrition and the development of bronchopulmonary dysplasia in preterm infants / 中国当代儿科杂志

OBJECTIVES@#To study the relationship between early parenteral nutrient intake and the development of bronchopulmonary dysplasia (BPD) in preterm infants with gestational age less than 32 weeks who could not receive enteral nutrition within one week after birth.@*METHODS@#A retrospective study was conducted on preterm infants born between October 2017 and August 2022 with gestational age less than 32 weeks who were admitted to the Neonatal Intensive Care Unit in Children's Hospital of Soochow University within 24 hours after birth and relied solely on parenteral nutrition within the first week of life. The study population included 79 infants with BPD and 73 infants without BPD. Clinical data during hospitalization were compared between the two groups.@*RESULTS@#The proportions of infants with weight loss of more than 10% after birth, extrauterine growth retardation, and parenteral nutrition-associated cholestasis in the BPD group were higher than in the non-BPD group (P<0.05). The time to regain birth weight, time to achieve full enteral feeding, and corrected gestational age at discharge were longer in the BPD group than in the non-BPD group. The Z-scores of physical growth at corrected gestational age of 36 weeks were lower in the BPD group than in the non-BPD group (P<0.05). The BPD group had a higher fluid intake and a lower calories intake in the first week than the non-BPD group (P<0.05). The starting dose and total amount of amino acids, glucose, and lipids in the first week were lower in the BPD group than in the non-BPD group (P<0.05). The BPD group had a higher glucose-to-lipid ratio on the third day and higher energy-to-nitrogen and glucose-to-lipid ratios on the seventh day after birth than the non-BPD group (P<0.05).@*CONCLUSIONS@#Preterm infants with BPD had lower intake of amino acids and lipids and a lower proportion of calories provided by amino acids and lipids in the first week of life, which suggests an association between early parenteral nutrition intake and the development of BPD.

Complicações metabólicas relacionadas à terapia de nutrição parenteral em pacientes hospitalizados / Metabolic complications related to parenteral nutrition therapy in hospitalized patients

Investigar as complicações metabólicas relacionadas à administração da terapia nutricional parenteral (TNP) e sua relação com o desfecho clínico de pacientes hospitalizados. Métodos: Estudo longitudinal retrospectivo realizado com pacientes internados em hospital público referência no atendimento de urgências e emergências da cidade de Goiânia no período de setembro de 2020 a fevereiro de 2021. A coleta de dados foi realizada por meio de consulta aos prontuários eletrônicos. As informações foram coletadas após o primeiro dia de uso da NP até o desfecho clínico -alta, óbito ou descontinuidade da NP. Resultados: A amostra foi constituída por 28 pacientes em uso de nutrição parenteral no hospital durante a etapa de coleta dedados. Desses pacientes a maioria era do sexo masculino, com média de idade de 46,78 anos. As indicações mais frequentes para o uso da terapia nutricional parenteral foram: repouso,abdome agudo e pós-operatório. As complicações mais prevalentes foram a hipocalemia, hipomagnesemia, uremia e a hiponatremia e o desfecho clínico mais frequente foi o óbito. Encontrou-se relação entre desfecho clínico e presença de hipernatremia (p=0,010), ocorrendo a alta hospitalar exclusivamente naqueles pacientes que não apresentaram hipernatremia. E ainda houve relação marginal (p=0,053) entre desfecho clínico e local da internação, sendo que foi mais frequente o óbito naqueles admitidos na unidade de terapia intensiva. Conclusão: Não houve associação entre a TNP e as complicações metabólicas. Todavia, observou-se relação entre hipernatremia e mortalidade, sendo esta mais prevalente em pacientes internados nas unidades de terapia intensiva (UTIs). Nessa amostra, a complicação metabólica mais observada foi a hipocalemia

To investigate the metabolic complication related to administration of the Parenteral Nutrition Therapy (PNT) and their relation to the clinical outcome of hospitalized patients. Methods: retrospective longitudinal study carried with interned patients at a public hospital of standart in the urgency and emergency care from the Goiânia city during the period from september2020 to february 2021. The data capture was realized through consultation to the electronic record. The information was collected after the first day use of NP to clinical outcome -discharge, death or discontinuation of NP. Results: The sample was composed by 28 patients in use of parenteral nutrition at hospital during the data capture. The majority of these patients were male, with mean age of 46-78 anos. The indications more frequent to the use of parenteral nutrition therapy were: rest, acute abdomen and pos-operative. The complications more prevalent were hypokalemia, hypomagnesemia, uremia and hyponatremia. And the clinical outcome more frequent was death. A relationship between clinical outcome and hypernatremia presence (p=0,010) was found, occurring the hospitalar discharge exclusively in those patients which did not submit to hypernatremia. And there was still a marginal relationship (p=0,053) between clinical outcome and hospitalization, which was more frequent the death in those admitted in intensive care units. Conclusion: There was no association between the PNT and the metabolic complications. However, there was an observed relationship between hypernatremia and mortality, while more prevalent in patients staying in the intensive care unit (ICU). In this sample, the metabolic complication most observed was hypokalemia

Evaluation of the effect of antibiotics used during parenteral nutrition treatment on Candidemia

SUMMARY OBJECTIVE: Parenteral nutrition is an important risk factor for candidemia. In this risk analysis study, the effect of previous antibiotic administration apart from the length of hospital stay, duration of Parenteral nutrition treatment, and Candida score parameters on developing candidemia was evaluated in the non-neutropenic patients receiving Parenteral nutrition treatment. METHODS: In this double center, retrospective, and cross-sectional study, the data of patients who received Parenteral nutrition treatment were collected. Patients with or without candidemia after the initiation of Parenteral nutrition treatment were compared in terms of demographic features, Candida score, length of hospital stay, duration of Parenteral nutrition treatment, and previous use of antibiotics. Then, predictor factors affecting the probability of candidemia during Candida growth time were determined by the Cox regression analysis. RESULTS: A total of 148 patients (59.5% males) were included and 16 (10.81%) of these had candidemia after initiation of parenteral nutrition treatment. The median (min-max) duration of parenteral nutrition treatment was 11 (4-72) days and the Candida growth time was 13 (7-29) days. Statistically significant differences were found between patients with or without candidemia groups in terms of length of hospital stay (p<0.001), duration of parenteral nutrition treatment (p<0.001), and Candida score (p<0.001). To determine the effect of these variables and antibiotics on candidemia, length of hospital stay [Hazard Ratio 1.030; p=0.021] and piperacillin-tazobactam (Hazard Ratio 5.626; p=0.030) were found significant and independent risk factors on the development of candidemia. CONCLUSION: There are some well-known risk factors including length of hospital stay, duration of Parenteral nutrition treatment, and Candida score; the potential impact of piperacillin-tazobactam administration should also be considered since they may be effective on the development of candidemia.

Mechanism of gut-microbiota-liver axis in the pathogenesis of intestinal failure-associated liver disease / 中华胃肠外科杂志

Intestinal failure (IF) is defined as the critical reduction of functional intestines below the minimum needed to absorb nutrients and fluids, so that intravenous supplementation with parenteral nutrition (PN) is required to maintain health and/or growth. Although the benefits are evident, patients receiving PN can suffer from serious cholestasis due to lack of enteral feeding and small intestinal bacterial overgrowth (SIBO). One such complication that may arise is intestinal failure-associated liver disease (IFALD). Evidences from recent studies suggest that alterations in the intestinal microbiota, as well as intraluminal bile acid driven signaling, may play a critical role in both hepatic and intestinal injury. Since Marshall first proposed the concept of the gut-liver axis in 1998, the role of gut-liver axis disorders in the development of IFALD has received considerable attention. The conversation between gut and liver is the key to maintain liver metabolism and intestinal homeostasis, which influences each other and is reciprocal causation. However, as a "forgotten organ" , intestinal microbiota on the pathogenesis of IFALD has not been well reflected. As such, we propose, for the first time, the concept of gut-microbiota-liver axis to emphasize the importance of intestinal microbiota in the interaction of gut-liver axis. Analysis and research on gut-microbiota-liver axis will be of great significance for understanding the pathogenesis of IFALD and improving the prevention and treatment measures.

Infectious complications associated with parenteral nutrition in intensive care unit and non-intensive care unit patients

ABSTRACT Introduction: Malnutrition is associated with an increased risk of complications in hospitalized patients, and parenteral nutrition (PN) is used when oral or enteral feeding is not possible. This study aimed at analyzing associations between PN characteristics and infectious complications in hospitalized patients. Material and methods: This was a retrospective cohort study conducted in a tertiarycare university hospital. Data from consecutive adult patients submitted to PN (January 2016 to December 2017; ICU and ward) were reviewed by means of an electronic database. Patient's clinical characteristics, PN prescription and catheter insertion procedure data were extracted and analyzed. The main outcome was the development of central line-associated bloodstream infection (CLABSI). The secondary outcomes were other infectious complications and mortality, as well as factors associated with CLABSI. Results: We analyzed 165 patients and 247 catheters used for parenteral nutrition infusion. The CLABSI rate was 6.47 per 1000 catheter-days. In the univariable analysis, CLABSI was associated with longer hospitalization time, longer PN time, longer catheter time, catheter insertion performed by a surgeon or a surgical resident, and procedures performed outside the ICU. In an extended time-dependent Cox regression, no variable was associated with a higher risk of CLABSI, and additional PN days did not increase the rate of CLABSI. The overall mortality rate was 24.8%. Only the patients' comorbidity index was associated with death in the multivariable analysis. Discussion: In our study, patients who needed PN had an overall CLABSI rate of 6.47 per 1000 catheter-days. These outcomes were not associated with PN and catheter characteristics studied after adjustment for catheter time. The overall mortality rate was 24.8% and it was not associated with PN in multivariable analyses, only with Charlson comorbidity index.

Hidratación de mantenimiento en niños agudamente enfermos / Maintenance hydration in acutely ill children

Introducción: un aspecto crítico del cuidado de pacientes agudamente enfermos es la administración de líquidos intravenosos. Existe poco consenso sobre la tasa más apropiada de administración y la composición de los líquidos intravenosos. La práctica con respecto a los fluidos de mantenimiento varía ampliamente. Objetivo: describir la composición y las tasas de administración más apropiadas de los líquidos intravenosos. Método: se realizó una revisión en Medline/Pubmed, Elseiver y Scielo de los artículos publicados en el período comprendido entre 1953-2016. No hubo restricción de idioma. Los términos de búsqueda fueron: fluidos intravenosos, hiponatremia y niños. Desarrollo: los fluidos hipotónicos siguen siendo recomendados en pacientes agudamente enfermos, a pesar de la fuerte asociación entre su uso y el desarrollo de hiponatremia. La abrumadora evidencia prospectiva hasta la fecha, indica que las soluciones de mantenimiento isotónicas son más seguras que los fluidos hipotónicos en la protección de la hiponatremia moderada y severa. Consideraciones finales: es hora de que dejemos de usar fluidos hipotónicos en estados de enfermedad asociados con exceso de arginina vasopresina, y no existe razón para que esta práctica continúe. Esta información debe ser difundida por la Academia, pues los profesionales involucrados en el cuidado de niños enfermos necesitan ser informados y entrenados adecuadamente(AU)

Introduction: a critical aspect in the care of acutely ill patients is the administration of intravenous fluids. There is little consensus on the most appropriate administration rate and composition of intravenous fluids. The practice with respect to maintenance fluids widely varies. Objective: to describe the composition and the most appropriate administration rates of intravenous fluids. Method: a review of articles published in the period from 1953 to 2016 was made in Medline/Pubmed, Elseiver and Scielo. There was no language restriction. The search terms were: intravenous fluids, hyponatremia and children. Development: hypotonic fluids are still recommended in acutely ill patients, despite the strong association between their use and the development of hyponatremia. The overwhelming prospective evidence to date indicates that isotonic maintenance solutions are safer than hypotonic fluids in the protection of moderate and severe hyponatremia. Conclusions: it is time for us to stop using hypotonic fluids in disease states associated with an excess of arginine vasopressin, and there is no reason for this practice to continue. This information must be disseminated by the Academy, as the professionals involved in the care of sick children need to be informed and trained properly(AU)

Hipofosfemia en recién nacidos prematuros: un trastorno bimodal / Hypophosphatemia in preterm infants: a bimodal disorder

Las estrategias nutricionales para prematuros extremos con alto aporte de proteínas, han mostrado alteraciones metabólicas con hipofosfemia precoz, especialmente en el grupo de pacientes con restricción de crecimiento intrauterino (Rein). También se presenta hipofosfemia tardía, característica de la enfermedad metabólica ósea. En este artículo se revisan y actualizan conceptos en relación a la fisiopatología del metabolismo del fósforo en recién nacidos prematuros y uso de parenterales precoces en el contexto de enfermedad metabólica ósea. Los artículos fueron identificados en base de datos electrónicas como Pubmed y Rima. Fueron incluidos artículos en inglés y español. Fueron filtrados por título y resumen. La literatura actual propone diversas estrategias de nutrición precoz que permitan asegurar una adecuada cantidad de nutrientes para continuar con el crecimiento y desarrollo extrauterino. En pacientes con nutrición parenteral pero con diferentes aportes de fósforo, o relación calcio: fósforo inadecuada, a mayor contenido de aminoácidos, se presenta hipofosfemia, hipercalcemia, hipomagnesemia, hipokalemia e hiperglicemia, especialmente en casos de Rein. Estas alteraciones se asocian a prolongación de ventilación mecánica, mayor riesgo de displasia broncopulmonar y aumento de sepsis tardía. La hipofosfemia tardía, descrita ya hace muchos años, se presenta con normocalcemia y aumento de fosfatasas alcalinas, en la enfermedad metabólica ósea del prematuro, con alteración de la mineralización en distintos grados, secundaria a un inadecuado aporte de este mineral para los altos requerimientos de estos pacientes. Esta presentación de hipofosfemia precoz y tardía en el prematuro alerta sobre el control oportuno de fosfemia para ajustar el aporte nutricional. En el prematuro con nutrición parenteral precoz, el control en conjunto con la calcemia en la primera semana de vida, especialmente en Rein, permite tratar la hipofosfemia y prevenir sus complicaciones. En hipofosfemia tardía, el seguimiento semanal o quincenal desde las 4 semanas a los prematuros con riesgo, permite lograr un aporte óptimo de minerales.

New nutritional approaches to treat extreme premature babies have demonstrated relevant eviden ce of metabolic disturbances with early hypophosphatemia, especially in patients with intrauterine growth restriction (IUGR). They have shown late hypophosphatemia, as well, which is characteristic in the metabolic bone disease. A sytematic search of literature describing metabolic disturbances of phosphorus in preterm newborns is presented, related to the use of early parenteral nutrition and also in the context of metabolic bone disease. The articles were gathered from electronic data bases, such as PubMed and Rima. We include articles in english and spanish which were selected by titles and abstracts. Several strategies for early nutrition have been proposed in order to ensure an adequate amount of nutrients to accomplish the development and growth of preterm babies. Patients with parenteral nutrition support with different doses of phosphate, or inadequate calcium phosphate relation, or an increased amino acid content, may present hypophosphatemia, hypercalcemia, hy pomagnesemia, hypokalemia and hyperglycemia, all of these are additionally noteworthy in the pre sence of intrauterine growth restriction. Furthermore, said alterations are associated with prolonged mechanical ventilation, as well as bronchopulmonary dysplasia and increase in late onset sepsis. The late hypophosphatemia, described several years ago, arises as normocalcemia and as an increment of alkaline phosphatases in the metabolic bone disease in preterm babies, and also with an inadequate mineralization in different grades, secondary to an inadequate supply due to high nutritional requi rements in these patients. When early or late hypophosphatemia appears in preterm babies, it shall require timely control of phosphemia and will need to adjust the nutritional intake in order to correct it. In case of preterm babies with early parenteral nutrition it will also need a control of calcemia in the first week of birth, especially if those belonging to the IUGR group. Adjustment must be made along with metabolic follow up, as well. In late hypophosphatemia, a weekly or every two weeks fo llow up will be a must for all preterm babies in risk and they should be given supplements to get an optimum mineral supply.

Glutamina: su papel en el paciente crítico / Glutamine: the role in critically ill patients

La glutamina es un aminoácido condicionalmente esencial considerado actualmente como un importante fármaco-nutriente. Niveles plasmáticos bajos de glutamina han demostrado comportarse como un factor independiente de mortalidad en el paciente crítico, y su adición al soporte nutricional ha probado disminuir las complicaciones infecciosas, la mortalidad y la estancia hospitalaria. En los últimos años han aparecido nuevos estudios que indicanla necesidad de individualizar la vía de acceso y la dosis y el período de suplementación para determinados grupos de pacientes candidatos a la suplementación con glutamina, y por otra parte, a tenor de los resultados, es aconsejable evitarla en situaciones deshock hipovolémico inestable, fallo multiorgánico o insu¬ciência renal no sometida a técnicas de depuración.

Glutamine is a conditionally essential aminoacid which is nowadays considered an important pharmaco nutrient. Low serum levels of glutamine have proven to be an independent predictor of mortality in the critically ill patient. Supplementation with glutamine as a part of a nutritional therapy has demonstrated to reduce infectious complications, length of stay in hospital and mortality. Recent new published data show the need to individualize the route, dose, length of supplementation for determined groups of candidate patients to glutamine administration. On the other hand, according to results, glutamine is not recommended in case of unstable hypovolemic shock, multiorgan faillure, or renal failure not subjected to depuration techniques.

Interação fármaco-nutriente em unidade de terapia intensiva: revisão da literatura e recomendações atuais / Drug-nutrient interactions in the intensive care unit: literature review and current recommendations

OBJETIVO: Descrever as interações entre fármacos e nutriente e sua frequência nas unidades de terapia intensiva bem como avaliar o grau de consciência a esse respeito por parte da equipe de profissionais. MÉTODOS: Foram revisados, na base de dados eletrônica PubMed, especificamente no MeSH, os unitermos: "drug interactions" e "nutrition therapy". Os estudos foram sistematicamente revisados para a descrição de tipos de interações entre fármacos e nutrientes, suas frequências e consequências. RESULTADOS: Foram encontrados 67 artigos. Dentre estes, 20 artigos estavam adequados à metodologia adotada e atingiram os objetivos do estudo. Destes, 14 artigos descreviam interações entre fármacos e nutrição enteral, 3 descreviam interações entre fármacos e nutrição parenteral, e 3 descreviam a importância e os cuidados para evitar tais interações. CONCLUSÃO: A literatura referente a interações entre fármacos e nutrientes é escassa e sugere a fragilidade das equipes assistenciais em reconhecer o potencial para interações. Possivelmente a construção de um protocolo para avaliação de interação fármaco-nutriente aumente a segurança e eficácia dos processos terapêuticos.

OBJECTIVE: To describe the interactions between drugs and nutrients and their frequency in the intensive care unit and to assess the professional team's awareness regarding this subject. METHODS: The keywords "drug interactions" and "nutrition therapy" were searched in the PubMed (specifically MeSH) electronic database. The studies were systematically reviewed for descriptions of the types of interactions between drugs and nutrients, including their frequency and consequences. RESULTS: Sixty-seven articles were found. Among these, 20 articles were appropriate for the methodology adopted and accomplished the objectives of the study. Of these 20 articles, 14 articles described interactions between drugs and enteral nutrition, three described interactions between drugs and parenteral nutrition, and three described the importance and care required to avoid such interactions. CONCLUSIONS: The literature about drug and nutrient interactions is limited and suggests the inability of health care teams to recognize the potential for these interactions. Possibly, the elaboration of a protocol to evaluate drug-nutrient interactions will increase the safety and efficacy of therapeutics.

Parenteral Nutrition Associated Cholestasis Is Earlier, More Prolonged and Severe in Small for Gestational Age Compared with Appropriate for Gestational Age Very Low Birth Weight Infants

PURPOSE: We hypothesized that parenteral nutrition associated cholestasis (PNAC) would be more severe in small for gestational age (SGA) compared with appropriate for gestational age (AGA) very low birth weight (VLBW) infants. MATERIALS AND METHODS: Sixty-one VLBW infants were diagnosed as PNAC with exposure to parenteral nutrition with elevation of direct bilirubin > or =2 mg/dL for > or =14 days. Twenty-one SGA infants and 40 AGA infants matched for gestation were compared. RESULTS: Compared with AGA infants, PNAC in SGA infants was diagnosed earlier (25+/-7 days vs. 35+/-14 days, p=0.002) and persisted longer (62+/-36 days vs. 46+/-27 days, p=0.048). Severe PNAC, defined as persistent elevation of direct bilirubin > or =4 mg/dL for more than 1 month with elevation of liver enzymes, was more frequent in SGA than in AGA infants (61% vs. 35%, p=0.018). The serum total bilirubin and direct bilirubin levels during the 13 weeks of life were significantly different in SGA compared with AGA infants. SGA infants had more frequent (76% vs. 50%, p=0.046), and persistent elevation of alanine aminotransferase. CONCLUSION: The clinical course of PNAC is more persistent and severe in SGA infants. Careful monitoring and treatment are required for SGA infants.

High Incidence of Rickets in Extremely Low Birth Weight Infants with Severe Parenteral Nutrition-Associated Cholestasis and Bronchopulmonary Dysplasia

Risk factors for rickets of prematurity have not been re-examined since introduction of high mineral formula, particularly in ELBW infants. We analyzed the incidence and the risk factors of rickets in extremely low birth weight (ELBW) infants. As a retrospective case-control study from 2004 to 2008, risk factors were analyzed in 24 patients with rickets versus 31 patients without. The frequency of rickets in ELBW infants was 24/55 (44%). Infants with rickets were diagnosed at 48.2 +/- 16.1 days of age, and improved by 85.3 +/- 25.3 days. By radiologic evaluation, 29% were grade 1 rickets, 58% grade 2 and 13% grade 3. In univariate analysis, infants with rickets had significantly higher incidence of patent ductus arteriosus, parenteral nutrition associated cholestasis (PNAC), severe PNAC and moderate/severe bronchopulmonary dysplasia (BPD). In multiple regression analysis, after adjustment for gestation and birth weight, rickets significantly correlated with severe PNAC and with moderate/severe BPD. Serum peak alkaline phosphatase levels were significantly elevated in rickets (P < 0.001). In ELBW infants, the incidence of rickets of prematurity remains high and the incidence of severe PNAC and moderate/severe BPD was significantly increased 18 and 3 times, respectively.

Late onset sepsis and intestinal bacterial colonization in very low birth weight infants receiving long-term parenteral nutrition / Sepse de ataque tardio e colonização bacteriana intestinal em neonatos de muito baixo peso recebendo nutrição parenteral total

INTRODUCTION: The purpose of this study was to establish the late onset sepsis (LOS) rate of our service, characterize the intestinal microbiota and evaluate a possible association between gut flora and sepsis in surgical infants who were receiving parenteral nutrition (PN). METHODS: Surveillance cultures of the gut were taken at the start of PN and thereafter once a week. Specimens for blood culture were collected based on clinical criteria established by the medical staff. The central venous catheter (CVC) tip was removed under aseptic conditions. Standard laboratory methods were used to identify the microorganisms that grew on cultures of gut, blood and CVC tip. RESULTS: 74 very low birth weight infants were analyzed. All the infants were receiving PN and antibiotics when the gut culture was started. In total, 21 (28.4%) infants experienced 28 episodes of LOS with no identified source. Coagulase negative staphylococci were the most common bacteria identified, both in the intestine (74.2%) and blood (67.8%). All infections occurred in patients who received PN through a central venous catheter. Six infants experienced episodes of microbial translocation. CONCLUSIONS: In this study, LOS was the most frequent episode in neonates receiving parenteral nutrition who had been submitted to surgery; 28.6% of this infection was probably a gut-derived phenomenon and requires novel strategies for prevention.

INTRODUÇÃO: O objetivo deste estudo foi estabelecer a taxa de sepse de ataque tardio (LOS) do nosso serviço, caracterizar a microbiota intestinal e avaliar uma possível associação entre a flora intestinal e sepse em recém-nascidos cirúrgicos que estavam recebendo nutrição parenteral (NP). MÉTODOS: Culturas do intestino foram colhidas no início da nutrição parenteral e, posteriormente, uma vez por semana. As amostras para a cultura de sangue foram coletadas com base em critérios clínicos estabelecidos pela equipe médica. A ponta do cateter venoso central (CVC) foi removida sob condições assépticas. Métodos laboratoriais padrão foram usados para identificar os microrganismos que cresceram em culturas de sangue, do intestino, e da ponta do CVC. RESULTADOS: Foram analisados 74 recém-nascidos de muito baixo peso. Todas as crianças estavam recebendo nutrição parenteral e antibióticos quando a cultura do intestino foi iniciada. No total, 21 (28,4%) crianças apresentaram 28 episódios de sepse tardia sem fonte identificada. Os estafilococos coagulase negativo foram os mais comuns das bactérias identificadas, tanto no intestino (74,2%) como no sangue (67,8%). Todas as infecções ocorreram em pacientes que receberam nutrição parenteral através de um cateter venoso central. Seis crianças experimentaram episódios de translocação microbiana. CONCLUSÕES: Neste estudo LOS foi o episódio mais frequente em recém-nascidos recebendo nutrição parenteral e submetidos a cirurgia, 28,6% da infecção provavelmente foi um fenômeno derivado do intestino o que exige novas estratégias para a prevenção.

Otro método para el cálculo de la hidratación / Another method to estimate the hydration

De manera tradicional se enseñan diferentes métodos para corregir las deshidrataciones por la vía parenteral. Para ello se recurre al cálculo a partir de síntomas clínicos que permiten clasificarlas en leves, moderadas y graves. En este trabajo se expone una modificación de la fórmula general de reposición de líquidos, que permite hacer un cálculo adecuado sin necesidad de recordar otras fórmulas y multiplicaciones. En la bibliografía dedicada a este tema, tanto cubana como extranjera, no se encontraron referencias al uso de este método; tampoco en la práctica médica diaria(AU)

In a traditional way different method to correct the dehydrations by parenteral route are taught. For that reason it is appeal to estimation of clinical symptoms allowing to its classification as slight, moderated and severe. In present paper it is showed a modification of the general formula of fluid recovery allowing making an appropriate estimation without to remember other formulae and multiplications. In the Cuban and foreign bibliography devoted to this subject there weren't references as regards the use of this method neither in the daily medical practice(AU)

Parenteral nutrition versus enteral nutrition in severe acute pancreatitis / Nutrição parenteral versus enteral em pacientes com pancreatite aguda grave

PURPOSE: To compare the effect of parenteral versus enteral nutritional support in severe acute pancreatitis, with respect to efficacy, safety, morbidity, mortality and length of hospitalization. METHODS: The study was comprised of 31 patients, divided into a parenteral group (n=16) and an enteral group (n=15), who met severity criteria for abdominal tomography (Balthazar classes C, D, and E). The patients were compared by demographics, disease etiology, antibiotic prophylaxis, use or not of somatostatin, nutritional support, complications and disease progression. RESULTS: There was no statistical difference in the average duration of nutritional support, somatostatin, or antibiotics in the two groups. Imipenem was the drug of choice for prophylaxis of pancreatic infections in both groups. More complications occurred in the parenteral group, although the difference was not statistically significant (p=0.10). Infectious complications, such as catheter sepsis and infections of the pancreatic tissue, were significantly more frequent in the parenteral group (p=0.006). There was no difference in average length of hospitalization in the two groups. There were three deaths in the parenteral group and none in the enteral group. CONCLUSION: Enteral nutritional support is associated with fewer septic complications compared to parenteral nutritional support.

OBJETIVO: Comparar o efeito do suporte nutricional parenteral versus enteral, em pancreatite aguda grave, com relação à eficácia, à segurança, à morbi-mortalidade e ao tempo de internação. MÉTODOS: Foram estudados 31 pacientes distribuídos em grupo parenteral (n=16), no período de 1995 a 1998 e grupo enteral (n=15), no período de 1999 a 2002, que preencheram os critérios de gravidade pela tomografia de abdome (Balthazar C,D,E). Os pacientes foram comparados quanto aos dados demográficos, etiologia, antibioticoprofilaxia, somatostatina, suporte nutricional, complicações e evolução. RESULTADOS: A maioria dos pacientes era Balthazar E, principalmente no grupo enteral, porém sem significado estatístico (p=0,21). Também não houve diferença estatística nos dois grupos em relação ao tempo médio de uso de suporte nutricional, somatostatina e antibiótico. O imipenem foi a droga de escolha para profilaxia da infecção pancreática nos dois grupos. Houve mais complicações gerais no grupo parenteral, sem significado estatístico (p=0,10). As complicações infecciosas do tipo sépsis do cateter e infecção do tecido pancreático foram mais frequentes no grupo parenteral, com significância estatística (p=0,06). Não houve diferença na média de internação nos dois grupos. Houve três óbitos no grupo parenteral e nenhum no enteral. CONCLUSÃO: O suporte nutricional enteral está associado à menor taxa de complicações sépticas do que o parenteral.

Pacientes assintomáticos apresentam infecção relacionada ao cateter venoso utilizado para terapia nutricional parenteral / Asymptomatic patients present infection related to the central venous catheter used for total parenteral nutrition

OBJETIVO: Avaliar a freqüência de infecção relacionada ao cateter venoso central em pacientes submetidos a terapia nutricional parenteral. MÉTODOS: Foram analisados os cateteres venosos centrais de pacientes em terapia nutricional parenteral que tiveram a indicação de retirada do cateter venoso central por infecção, alta hospitalar, ou trombose. Os pacientes com infecção foram denominados de Grupo 1 e os demais de Grupo 2. RESULTADOS: Não houve diferença estatisticamente significante quanto ao estado nutricional dos 18 pacientes analisados. Foram analisados 28 cateteres e destes 68 por cento estavam infectados, sendo 72 por cento do Grupo 1 e 28 por cento do Grupo 2 (assintomáticos). No Grupo 1, houve infecção sistêmica em 70 por cento dos casos, já no Grupo 2 a hemocultura foi positiva em 17 por cento dos casos. A colonização por Staphylococcus sp. ocorreu em 48 por cento dos casos, seguida de Candida sp. (21 por cento), Enterococcus faecalis (16 por cento), Pseudomonas aerurginosa (10 por cento) e Proteus sp.(5 por cento). CONCLUSÃO: A contaminação de cateter venoso central utilizado para terapia nutricional parenteral é freqüente. Mesmo pacientes assintomáticos recebendo nutrição parenteral têm uma incidência maior de infecção por Candida sp. Portanto é necessária a criação de barreiras que impeçam a colonização destes cateteres venosos centrais, a fim de diminuir a morbimortalidade de pacientes dependentes deste tipo de terapia.

OBJECTIVE: The aim of this study was to evaluate the frequency of central venous catheter-related infections in hospitalized patients receiving total parenteral nutrition. METHODS: Central venous catheters were analyzed immediately after removal due to infection, hospital discharge or thrombosis. The patients with catheter-related infection were named Group 1 and the other patients were named Group 2. RESULTS: Eighteen patients were studied. There was no statistically significant difference in nutritional status between the two groups. A total of 28 catheters were analyzed. Sixty-eight percent of the catheters were infected: 72 percent of them were from Group 1 and 28 percent from Group 2 (asymptomatic patients). Systemic infection was diagnosed in 70 percent of the patients from Group 1. Positive blood culture was found in 17 percent of the patients from Group 2. The microorganisms found were: Staphylococcus sp. (48 percent), Candida sp. (21 percent), Enterococcus faecalis (16 percent), Pseudomonas aerurginosa (10 percent) and Proteus sp. (5 percent). CONCLUSION: Central venous catheter infection is common in hospitalized asymptomatic patients. Patients receiving total parenteral nutrition are most frequently infected with Candida sp. Therefore, the creation of barriers that block colonization in the central venous catheter is essential to decrease the morbidity and mortality among patients that depend on total parenteral nutrition.

Parenteral nutrition.

Nutritional insufficiency, leading to early growth deficits has long-lasting effects, including short stature and poor neurodevelopmental outcomes. Early enteral feeding is commonly limited by immaturity of gastrointestinal motor function in preterm neonates. To ensure that a stressed premature infant receives an adequate but not excessive amount of glucose, the amount of carbohydrate delivered in the form of dextrose is commonly initiated at the endogenous hepatic glucose production and utilization rate of 4 to 6 mg/kg/min; and 8 to 10 mg/kg/min in ELBW infants. The early provision of protein is critical to attain positive nitrogen balance and accretion as premature babies lose approximately 1% of their protein stores daily. Aminoacid can be used at concentrations of 3-3.5 g/kg/day and lipid at 3.5-4 g/kg/day as long as the fat intake remains less than 60% of nonprotein calories. Sodium, potassium, chloride, calcium, magnesium and phosphorus need to be provided in PN solution as per their daily needs. Hospital-acquired infection (HAI) is a major complication of PN. All efforts should be made to avoid it.

Nutrição parenteral em eqüinos / Parenteral nutrition in horses / Nutrición parenteral en equinos

O bem estar do paciente em sepse, traumatizado e no período pós-operatório, tem sido foco de crescente interesse da Medicina Veterinária. O impacto desfavorável do estado nutricional inadequado na função imune e na reparação tecidual tem sido demonstrado. O objetivo primário da nutrição parenteral é fornecer nutrição adequada, quando a alimentação por via oral é impraticável ou inadequada. Desta forma, a nutrição parenteral é utilizada para correção de déficits nutricionais ou para manter o aporte calórico-protéico, em que o mais importante é o equilíbrio do nitrogênio. O suporte parenteral é considerado um meio temporário satisfatório para manter as necessidades energéticas de um eqüino anorético, por poupar a perda de massa magra e permitir a recuperação orgânica. O requisito energético deverá ser calculado para cada paciente. No entanto, existem controvérsias quanto ao nível de suporte calórico exigido por eqüinos doentes e confinados. O término da nutrição parenteral deve ser feito de maneira gradual, para prevenir a súbita queda no fornecimento de energia e hipoglicemia. Complicações associadas com a nutrição parenteral podem ser mecânicas, metabólicas ou infecciosas. Este artigo de revisão descreve os métodos de administração e o momento em que a nutrição parenteral deve ser administrada a um eqüino enfermo, bem como as complicações potenciais associadas a esta técnica.

The nutritional well fare of septic, traumatized, and postoperative patients has been the focus of increasing attention in veterinary medicine. The unfavorable impact of poor nutritional status on immune function and wound healing has been demonstrated. Parenteral support, whether total or partial, should be viewed as a “bridge” to the enteral provision of nutrients. The primary purpose of parenteral nutrition is to provide adequate intravenous nutrition when feeding by gastrointestinal tract is practical, inadequate or ill advised. Therefore, parenteral nutrition is used to correct nutritional deficits or to prevent protein-calorie malnutrition, the most important of which being nitrogen balance. Parenteral nutrition is considered a temporary method to support the anorectic horse by sparing the body from destruction in order to supply energy for recovery. The energy requirements should be calculated for each patient. Nevertheless, controversy exists as to the level of caloric support needed by sick, confined horses. Termination of parenteral nutrition is best done gradually so as to prevent a sudden decrease in caloric provision and hypoglycemia. Complications associated with parenteral nutrition can have a mechanical, metabolic, or infectious origin. This article reviews delivery methods and the time parenteral nutrition should be administered to an unhealthy horse, as well as the complications associated to such techniques.

El bienestar del paciente séptico, traumatizado y en periodo postoperatorio ha sido foco de interés creciente en la medicina veterinaria. El impacto desfavorable del estado nutricional inadecuado en la función inmune y en la reparación tecidual ha sido demostrado. El objetivo primario de la nutrición parenteral es suministrar nutrición adecuada, cuando la alimentación por vía oral es impracticable o inadecuada. De esta forma, la nutrición parenteral es utilizada para corrección de déficit nutricional o para mantener el aporte calórico-proteico, donde el más importante es el equilibrio del nitrógeno. El soporte parenteral es considerado un medio temporáneo satisfactorio para mantener las necesidades energéticas de un equino anoréxico, por ahorrar la pérdida de masa magra y permitir la recuperación orgánica. El requisito energético deberá ser calculado para cada paciente. Sin embargo, existen controversias cuanto al nivel de soporte calórico exigido por equinos enfermos y estabulados. El término de la nutrición parenteral debe ser hecho de manera gradual, para prevenir la súbita caída en el suministro de energía e hipoglucemia. Complicaciones asociadas con la nutrición parenteral pueden ser mecánicas, metabólicas o infecciosas. Esta revisión describe los métodos de administración y el momento en que la nutrición parenteral debe ser administrada a un equino enfermo, así como las complicaciones potenciales asociadas a esta técnica.

Infección por Leuconostoc en pacientes con síndrome de intestino corto, nutrición parenteral y alimentación enteral continua / Leuconostoc infcctions in patients with short gut syndrome, parenteral nutrition and continuous enteral feeding

Leuconostoc is a grampositive cocci, quite ubiquitous in nature. It is used in wine industry, and for aroma and texture of dairy products. Occasionally it has been isolated from humans in cases of bacteremia, catheter associated infections, sepsis, meningitis, pneumonia, UTI, osteomyelitis and hepatic dysfunction. Short bowel syndrome, patients with CVC and patients with gastrostomy undergoing enteral feeding, are described amongst the factors associated with this infection. The isolation of a grampositive cocci, that does not hydrolyze arginine and that is resistant to vancomycin leads to this diagnostic possibility. Antibiotic treatment: penicillin or ampicillin.

Leuconostoc es una cocácea grampositiva parecida a los Streptococcus, que se encuentra ampliamente distribuida en la naturaleza; es usada en la industria de vinos, productos lácteos y quesos para la producción de aromas y texturas. Leuconostoc causa ocasionalmente infecciones en humanos, puede producir bacteriemia, infección asociada a catéter, síndrome séptico, meningitis, neumonía, infección del tracto urinario, osteomielitis y compromiso hepático, entre otros. Se describen como factores de riesgo para una infección por este agente: el síndrome de intestino corto, uso de catéter venoso central y la alimentación enteral por gastrostomía. Orientan a la presencia de este agente el aislamiento de una cocácea grampositiva, catalasa negativa, PYR y LAP negativas, resistente a vancomicina. El tratamiento de elección es penicilina o ampicilina.