[Refeeding syndrome : Pathophysiology, risk factors, prevention, and treatment]. / Refeeding-Syndrom : Pathophysiologie, Risikofaktoren, Prophylaxe und Therapie.

Refeeding syndrome is a life-threatening complication that may occur after initiation of nutritional therapy in malnourished patients, as well as after periods of fasting and hunger. Refeeding syndrome can be effectively prevented and treated if its risk factors and pathophysiology are known. The initial measurement of thiamine level and serum electrolytes, including phosphate and magnesium, their supplementation if necessary, and a slow increase in nutritional intake along with close monitoring of serum electrolytes play an important role. Since refeeding syndrome is not well known and the symptoms can be extremely heterogeneous, this complication is poorly recognized, especially against the background of severe disease and multimorbidity. This overview aims to summarize the current knowledge and increase awareness about refeeding syndrome.

Prevalence of Risk Factors for the Refeeding Syndrome in Older Hospitalized Patients.

OBJECTIVES: The incidence of refeeding syndrome (RFS) in older patients is not well-known. The aim of the study was to determine the prevalence of known risk factors for RFS in older individuals during hospitalization at geriatric hospital departments. DESIGN AND SETTING: 342 consecutive older participants (222 females) who admitted at acute geriatric hospital wards were included in a cross-sectional study. We applied the National Institute for Health and Clinical Excellence (NICE) criteria for determining patients at risk of RFS. In addition, Mini Nutritional Assessment Short Form (MNA®-SF) was used to identify patients at risk of malnutrition. Weight and height were assessed. The degree of weight loss was obtained by interview. Serum phosphate, magnesium, potassium, sodium, calcium, creatinine and urea were analyzed according to standard procedures. RESULTS: Of 342 older participants included in the study (mean age 83.1 ± 6.8, BMI range of 14.7-43.6 kg/m2), 239 (69.9%) were considered to be at risk of RFS, in which 43.5% and 11.7% were at risk of malnutrition and malnourished, respectively, according to MNA-SF. Patients in the risk group had significantly higher weight loss, lower phosphate and magnesium levels. In a multivariate logistic regression analysis, low levels of phosphate and magnesium followed by weight loss were the major risk factors for fulfilling the NICE criteria. CONCLUSION: The incidence of risk factors for RFS was relatively high in older individuals acutely admitted in geriatric hospital units, suggesting that, RFS maybe more frequent among older persons than we are aware of. Patients with low serum levels of phosphate and magnesium and higher weight loss are at increased risk of RFS. The clinical characteristics of the older participants at risk of RFS indicate that these patients had a relatively poor nutritional status which can help us better understand the potential scale of RFS on admission or during the hospital stay.

Do doctors know how much nutrition patients need--a survey from Germany?

For the diagnosis, prevention and therapy of malnutrition, it is important to estimate the energy and fluid requirements of an individual patient. To our knowledge, it is unknown how accurately medical doctors can estimate the energy and fluid requirements of patients in a clinical routine situation. Hence, we conducted the following survey. A written face-to-face survey about the energy and fluid requirements of and tube feeding and fluid recommendations for a typical patient was performed with 179 medical doctors. An estimation error of >15% was defined as relevant. The results revealed substantial variations in estimating the energy and fluid needs of the patient. A total of 25% of the participants underestimated the energy requirements, and 47% of the participants underestimated the fluid requirements. In addition, 68% of the participants recommended a daily dose of tube feeding that was <85% of the reference value. A substantial proportion of medical doctors show a lack of knowledge concerning energy and fluid requirements, which demonstrates a need for better medical education with regard to nutrition.

Dementia among older in-hospital patients with obstructive airway disease: frequency and consequences.

BACKGROUND: Dementia may influence as a co-morbid condition the management of chronic obstructive airway disease. However, the frequency and the consequences of dementia in older people with chronic obstructive airway disease are largely unknown. PATIENTS AND METHODS: The frequency and the severity of dementia in geriatric in-hospital patients and its impact on feasibility of lung function testing and drug treatment provided were determined. RESULTS: Out of a total of 1,424 patients with obstructive airway disease, 433 (30%) suffered from mild and 307 (22%) suffered from moderate to severe dementia. The frequency of any treatment for obstructive airway disease on admission decreased from 58% in subjects without dementia to 51% of those with mild and to 36% of those with moderate to severe dementia (p<0.01). The feasibility of performing lung function testing also decreased with increasing prevalence of dementia from 86% to 66% and 43%, respectively (p<0.001). CONCLUSION: Dementia is a frequent finding in older in-hospital patients with obstructive airway disease. The majority of subjects with dementia were not able to perform lung function testing. Furthermore, the risk of undertreatment for chronic obstructive airway disease increased. Future guidelines for management of obstructive airway disease must also take into account the special needs and skills of older subjects with dementia.

Prevalence of percutaneous endoscopic gastrostomy in nursing home residents--a nationwide survey in Germany.

BACKGROUND: Despite extensive discussion about percutaneous endoscopic gastrostomy (PEG) in nursing home residents, no prevalence data exist in most countries. OBJECTIVE: This study aimed to determine the prevalence of PEG in German nursing homes, as well as nursing home characteristics that may influence this prevalence. Additionally, we documented the timing of PEG insertion, whether pre- or post-admission to the nursing home, and the proportion of residents receiving oral nutrition in addition to tube feeds. METHODS: A 26-item questionnaire was sent to 6,995 German nursing homes. Responses were anonymous. RESULTS: Of the 6,995 questionnaires sent out, 807 (11.5%) were completed and returned. Of the 66,507 total residents in the responding nursing homes, there were 4,390 residents with PEG (6.6%). The median PEG prevalence was 5.6% (5th-95th percentile 1.0-16.3%). Of all PEGs inserted, 55.3% were inserted before and 44.7% were inserted after nursing home admission. Oral beverage intake in addition to tube feeding was reported in 48.8% of residents with a PEG, and 43.5% of patients also received solid food. There were no significant differences in PEG prevalence between the federal states of Germany. The location (rural vs. urban) of the nursing home, its proprietor and food delivery method had no significant influence on PEG prevalence. With regard only to PEG tubes inserted after nursing home admission, all the factors stated above showed no significant influence on PEG prevalence. Weak positive correlations between PEG prevalence and the size of the nursing home as well as the number of total and certified nursing staff per resident could be detected, reflecting the heavy burden of care associated with residents requiring artificial nutrition. CONCLUSIONS: Compared to other countries, Germany can be assumed to have an average PEG prevalence in nursing home residents. No specific nursing home characteristics could be identified that affect PEG prevalence.