Development of hyponatremia in non-critical patients receiving total parenteral nutrition: A prospective, multicenter study.

BACKGROUND & AIMS: Hyponatremia is frequent in hospitalized patients, especially in those receiving total parenteral nutrition (TPN). Furthermore, the presence of hyponatremia is associated with increased morbimortality in both groups. The goal of this study is to describe the prevalence of hyponatremia developing during TPN in non-critical patients, and identify risk factors for its appearance. METHODS: This prospective multicenter study involved 19 Spanish hospitals. Noncritically-ill patients prescribed TPN over a 9-month period were studied. Variables analyzed demographic characteristics, prior comorbidities, drug therapy, PN composition, additional iv fluids, and serum sodium levels. RESULTS: A total of 543 patients were recruited, 60.2% males. Age: 67 (IR 57-76). Of 466/543 who were eunatremic when starting TPN, 18% developed hyponatremia (serum sodium < 135 mmol/L) during TPN. Independent risk factors identified by logistic regression analysis: female (OR 1.74 [95% CI = 1.04-2.92], p = 0.036); severe malnutrition (OR 2.15 [95% CI = 1.16-4.35], p = 0.033); opiates (OR 1.97 [95% CI = 1.10-3.73], p = 0.036); and nausea/vomiting (OR 1.75 [95% CI = 1.04-2.94], p = 0.036). CONCLUSIONS: Previously eunatremic patients frequently develop hyponatremia while receiving TPN. In this group, severe malnutrition is an independent risk factor for hyponatremia, as well as previously described risk factors: opiates, nausea/vomiting, and female gender.

PREDyCES study: The cost of hospital malnutrition in Spain.

OBJECTIVES: The aim of this study was to analyze the economic effects of hospital malnutrition and the cost of longer hospital stays according to the Prevalence of Hospital Malnutrition and Associated Costs in Spain (PREDyCES) study data. METHODS: This was a nested case-control study in a prospective cohort of patients (n = 114) who were at nutritional risk at admission and controls (n = 354) who were not at risk at admission. The total cost of hospital stay was the cost of the bed plus the cost of drugs administered during the stay. Hospital costs were extrapolated to Spanish National Health System admissions for 2009. RESULTS: The mean hospital length of stay for patients at risk (cases) was significantly longer (11.5 ± 7.5 versus 8.5 ± 5.8 d; P < 0.001) than for the controls. The cost of patients at risk at admission was significantly higher than that of those not at risk (€8590 ± €6127 versus €7085 ± €5625; P = 0.015). The most significant difference in the cost of the hospital stay was observed between controls at nutritional risk at discharge and controls who remained not at risk throughout the hospital stay (€13 013 ± €9086 versus €6665 ± €5091; P < 0.001). Extrapolation of the study findings to Spanish National Health System hospital admissions showed that the potential cost of hospital malnutrition in Spain was at least €1.143 billion per year. CONCLUSION: Hospital malnutrition in Spain is associated with substantial costs, suggesting the need to establish procedures for screening, diagnosing, and treating malnutrition.

[Pendred's syndrome: a cause of goiter associated with deafness]. / Síndrome de Pendred: una causa de bocio relacionada con sordera.

Pendred's syndrome is an autosomal recessive disorder leading to congenital sensorineural hearing loss and a variable degree of goiter due to reduced iodine organification. The cause of this disease is dysfunction of an anion transporter protein located on the apical membrane of thyrocytes, called pendrin, which is also found in the kidney and cochlea. Molecular analysis of the gene is useful to identify other affected family members and provide proper genetic advice and early diagnosis in descendants. We present the cases of two siblings with sensorineural deafness who were diagnosed with Pendred's syndrome as adults because one of them consulted for goiter.