Artificial nutrition support in intensive care units in Spain. Nutritional and Metabolic Working Group of the Spanish Society of Intensive Care Medicine and Coronary Units (SEMIUC)

The Use of Transpyloric Enteral Nutrition in the Critically Ill Child

To assess the use and complications of transpyloric enteral nutrition (TEN) in the critically ill child we evaluated prospectively all children who received TEN in a pediatric intensive care unit (PICU) of a tertiary university hospital. The type of nutrition used, its duration, medication administered, tolerance, gastrointestinal complications (vomiting, abdominal distension or excessive gastric residue, diarrhea, and pulmonary aspiration), nongastrointestinal complications, and mortality were assessed. A comparative analysis was made between the first 2 years of the study and the remaining period. Over a period of 4.5 years, 152 patients between the ages of 3 days and 17 years received TEN for a duration of 19 ± 32.3 days (range 1–240 days). Forty-one patients received TEN during the first 2 years; 100 patients received TEN in the postoperative period after cardiac surgery (66%). One hundred seventeen patients (77%) received sedation and 65 (43%) received muscle relaxants, presenting no extra complications. Twenty-four patients (15.8%) presented with gastrointestinal complications: abdominal distension and/or excessive gastric residue in 17 and diarrhea in 11. Gastrointestinal intolerance was associated with pulmonary infection ( p < 0.05), altered hepatic function ( p < 0.001), and hypokalemia or hypocalcemia ( p < 0.05). Diarrhea was more frequent in patients with shock ( p < 0.05), altered hepatic function ( p < 0.05), excessive gastric residue ( p < 0.001), and hypokalemia or hypocalcemia ( p < 0.05). In the second study period, the number of patients on TEN and the doses of sedatives, muscle relaxants, and vasoactives were higher ( p < 0.05), with no increase in the incidence of complications. TEN is a useful method of nutrition with few complications in the critically ill child.

A European survey of enteral nutrition practices and procedures in adult intensive care units

AIMS

The aim of this survey was to gain an overview of enteral nutrition practices and procedures of European adult intensive care units and to describe current trends.

BACKGROUND

Currently, little is known about nutritional practices in European intensive care units and whether they match existing guidelines.

DESIGN

Survey.

METHODS

A 51-item questionnaire about nutritional assessment and enteral feeding was distributed to 383 intensive care units in 20 countries.

RESULTS

A total of 380 (99.2%) questionnaires were returned. Most intensive care units (86.5%, n = 320/370) did not use a nutritional risk score and 35.8% (n = 133/371) conducted daily assessments of nutritional status; body weight and serum albumin were the commonest measures. Checking the position of the feeding tube using auscultation of injected air was widespread (72.6%, n = 275/373). Most units used a clinical protocol and under half were supported by a nutritional support team.

CONCLUSION

There are some variations in enteral nutrition practices across European intensive care units. Involvement of nurses in performing nutritional assessments or developing clinical protocols was minimal. The use of outdated procedures for checking feeding tube placement is a concern. There is scope for further development of nutrition guidelines in European units.

RELEVANCE TO CLINICAL PRACTICE

This study is relevant to all nurses working in critical care areas. The findings suggest that when an intensive care unit is supported by a nutritional support team it is more likely that a nutritional score will be used and nutritional assessments will be made daily. Many intensive care practices do not conform to international guidelines for enteral feeding. Nutritional assessment and the use of nutritional risk scores are areas that would benefit from further application in intensive care. This study may provide an impetus for intensive care units to review their nutrition assessment practices and to advance evidence-based guidelines, developed by multi-professional teams, which ensure the safe and effective management of patients receiving enteral nutrition.

Establishment of enteral nutrition: prokinetic agents and small bowel feeding tubes

PURPOSE OF REVIEW

Nutritional support is vital to improving the clinical outcomes in patients in the intensive care unit. Enteral nutrition should be administered early and aggressively, thereby reducing the need for parenteral nutrition. Because nasogastric feeding is often associated with gastrointestinal intolerance, recent research has focused on the use of prokinetic agents or small bowel feeding tubes to enhance the successful establishment and maintenance of enteral nutrition.

RECENT FINDINGS

Prokinetic agents (such as metoclopramide and erythromycin) improve markers of gastric emptying and appear to improve tolerance of enteral nutrition, although their effects on clinical outcomes are not as well established. In comparison with nasogastric feeding, small bowel feeding allows the dysfunctional stomach of the critically ill to be bypassed, thereby reducing the rate of gastrointestinal complications and probably the risk of pneumonia. Small bowel tubes are more difficult to place than nasogastric tubes, although the new Tiger tube appears very promising.

SUMMARY

Nasogastric feeding is preferred for almost all patients in the intensive care unit. Metoclopramide is the preferred prokinetic agent, although whether it or erythromycin should be administered to all patients in the intensive care unit or only those with gastrointestinal intolerance remains unknown. Small bowel feeding is not currently recommended for all patients in the intensive care unit because the benefits do not appear to outweigh the logistic and cost considerations. Nevertheless, when gastrointestinal intolerance develops in a nasogastrically fed patient, a small bowel feeding tube should be inserted at the earliest opportunity.

Nutrition given to critically ill patients during high level/complex care (on Italian ICUs)

BACKGROUND & AIMS

Within a prospective study on costs in 45 Italian intensive units we reviewed nutrition support practice given during critical illness.

METHODS

From June to October 1999, patients with an ICU stay longer than 47 h were studied. Nutrition (i.e. fasting, parenteral, enteral and mixed) and calorie supply by the enteral route were monitored during the first consecutive days (up to seven) of invasive support of organ failure (high-care).

RESULTS

388 patients received high-care for at least 1 day, 200 patients had seven consecutive high-care-days. Some form of nutrition was given in 90.7% of patients, 9.3% were never fed (25.8% of the cardiac patients). Parenteral nutrition was given in 13.9% of patients (78.9% of the abdominal surgery patients), 39.7% received only enteral nutrition, and 36.4% received mixed nutrition. Finally, 77.1% of the patients received nutrient by gut. Nutrition was given in 78.5% of 2115 collected days, 44.1% of the first high-care-days and 93.5% of the 7th days were positive for nutrition. Enteral calorie load on the first day was similar for enteral and mixed nutrition (range 8-14 kcal/kg), it was higher for exclusive enteral nutrition between the 4th and the 7th day (15-19 vs. 11-14 kcal/kg). It differed according to diagnosis group.

CONCLUSIONS

In Italian ICUs, in complex critically ill patients, nutrition is consistently given in critical illness, gut is widely used except in abdominal surgery patients.

Practical aspects of peripheral parenteral nutrition

PURPOSE OF REVIEW

The purpose of this review is to provide an update on the advantages and disadvantages of using peripheral parenteral nutrition, including the techniques, indications and results.

RECENT FINDINGS

The new catheters, together with a better knowledge of intermediate metabolism, permit the use of peripheral parenteral nutrition in many clinical situations during short periods of time.

SUMMARY

Peripheral parenteral nutrition is an alternative to total parenteral nutrition, and is a complement to enteral nutrition and the oral route. Progress in catheter design and materials, infusion techniques and an improved knowledge of the optimal nutriments has made peripheral parenteral nutrition a safe, efficient and useful method to treat patients over certain periods of time.

Randomized comparison of nasojejunal and nasogastric feeding in critically ill patients

OBJECTIVE

Critically ill patients often develop large gastric residual volumes during nasogastric feeding as a result of poor gastroduodenal motility. Nasojejunal feeding may decrease the severity of this complication. The aim of this study was to determine whether nasojejunal feeding improved tolerance of enteral nutrition by reducing gastric residual volumes.

DESIGN

Randomized, prospective, clinical study.

SETTING

Intensive care unit of a university-affiliated hospital.

PATIENTS

Seventy-three intensive care unit patients expected to require nutritional support for at least 3 days.

INTERVENTIONS

Patients were randomized to receive enteral nutrition via a nasojejunal tube (placed endoscopically) (34 patients) or a nasogastric tube (39 patients). A strict protocol was followed, which included regular gastric residual volume measurement (in both groups), the use of predetermined criteria for intolerance, and an attempt at nasojejunal feeding for those nasogastrically fed patients who were intolerant of enteral nutrition.

MEASUREMENTS AND MAIN RESULTS

Endoscopic placement of nasojejunal tubes was successful in 98% with no complications of insertion. Patients fed via a nasojejunal tube had 1) a reduced total gastric residual volume in both the first 24 (197 vs. 491 mL, p = .02) and 48 hrs (517 vs. 975 mL, p = .02); 2) a reduced incidence of a single gastric residual volume >150 mL (32% vs. 74%, p = .001); and 3) a trend toward a reduced incidence of intolerance of enteral nutrition (13% vs. 31%, p = .09). Only 13% of those nasogastrically fed patients who were initially intolerant of enteral nutrition remained intolerant once fed via a nasojejunal tube, and only 1.4% of all patients met criteria for commencement of parenteral nutrition.

CONCLUSIONS

Enteral nutrition delivered via a nasojejunal tube is associated with a significant reduction in gastric residual volume, a strong trend toward improved tolerance of enteral nutrition, and an extremely low requirement for parenteral nutrition.

Evolution of the nutritional support pattern in pediatric intensive care

OBJECTIVES

To evaluate patterns of usage and monitoring of nutritional support in a Pediatric ICU of a teaching hospital and the role of an education program in nutritional support given throughout the resident physician training.

DESIGN

In a historical cohort study, records from children who received nutritional support during the year 1992 were analyzed. Thereafter a continuing education program in Nutritional Support was conveyed to the residents. In a second phase of the study, the same parameters were reevaluated in children who received nutritional support throughout the year 1995.

SETTING

Pediatric Intensive Care Unit of Department of Pediatrics, Escola Paulista de Medicina.

PATIENTS

All the children who were given nutritional support during a period of five days or more. Based on this criteria 37 children were selected for the first phase of this study, and 35 for the second one.

INTERVENTION

The education program included theoretical lectures about basic themes of nutritional support and journal article reading sessions. It was given to successive groups of residents on a weekly schedule.

MEASUREMENTS

Daily records of fluid, protein, caloric and micronutrient supply, nutritional assessment and metabolic monitoring.

RESULTS

In the first phase of the study, an exclusively parenteral route was utilized for 80.5%, and a digestive route 19.5% of the time period. Nutritional assessment was performed on 3 children; no patient had the nutritional goals set. The nitrogen to nonprotein calories ratio and the vitamin supply were inadequate, whilst the supply of trace elements was adequate except for zinc. Nutritional monitoring was performed on almost all patients but without uniformity. In the second phase, the exclusive parenteral route was used for 69.7% and the digestive route for 30.3% of the time period; no significant increase in the use of the digestive route was detected. The nonprotein calories to nitrogen ratio and micronutrient supply were adequate. The frequency of nutritional assessment increased, but deficiency in nutritional monitoring and infrequent enteral feeding were still detected.

CONCLUSION

There were deficiencies in the implementation of nutritional support, which were partially corrected in the second phase of the study by the training of the residents. Reinforcement of the education program, which should be applied to the whole medical staff, and the organization of a multidisciplinary team in charge of coordinating the provision of nutritional support are suggested.

A 10-year survey of nutritional support in a surgical ICU: 1986-1995

Total parenteral nutrition (TPN) has long been considered the optimal nutrition technique in critically ill patients, but recently the use of enteral nutrition (EN) has increased. This study describes the evolution of the different nutritional support techniques in a surgical intensive care unit (ICU) in a university hospital, through (1) a global survey over 10 y assessing the evolution of the use of EN and TPN, and (2) a prospective study performed over 6 mo. Severity of illness and diagnostic categories were stable (n = 11,539 patients). From 1986 to 1990, the proportion of TPN administered increased from 10-25% of ICU days, decreasing to 10% thereafter. EN was used in about 5% of ICU days in 1986, and had increased to 30% of total ICU treatment days in 1995. The proportion of nutrients actually delivered to the patients was 75% with EN and 88% with TPN. Major changes in nutritional support have been observed since 1986. The frequency of nutritional support provided in general has increased to 40% of ICU treatment days. TPN has been largely overtaken by EN, with the risk of insufficient energy delivery, related to the difficulties of EN in the critically ill. These results reinforce the importance of continuous quality control by daily assessment of nutrient supply.