Support of pediatric patients

BACKGROUND OF THE INVENTION

The present invention relates generally to the treatment and nutritional support of patients. More specifically, the present invention relates to providing nutrition to pediatric patients.

The measurement of diet adequacy in patients, especially pediatric patients, is difficult. Increases in a child's weight and length only grossly reflect nutritional progress. The daily requirements for adequate nutrition are especially significant for the growing child compared with the adult. The relative need for protein, vitamins and minerals remains constant and is greater than that of adults. Moreover, requirements for various vitamins depend on the intake of calories, protein, fat, carbohydrate and specific amino acids.

While the nutritional needs of the pediatric patient differ from adult patients, in health care settings, adult nutritional formulas are the primary form of elemental nutrition currently being used for children. Naturally, adult formulas do no take into effect the known nutritional needs of the pediatric patient. These adult enteral nutritional products must be diluted to decrease concentrations of, for example, protein, sodium, chloride and the renal solute load levels recommended for children. This dilution reduces the concentrations of other needed nutrients that are often already in concentrations too low for children (i.e. calcium and phosphorous). Thus, providing a nutritional formula designed specifically for children would be advantageous.

A whole protein enteral formula sold under the trademark PEDIASURE.RTM. is currently available from Ross Laboratories for nutritional therapy of pediatric patients. PEDIASURE.RTM. contains 12% protein, 44% carbohydrates, and 44% fat. The whole protein formula has a protein composition of 82% casein and 18% whey.

Although PEDIASURE.RTM. is formulated for children, it is designed to provide nutrition for a limited population, namely 1 to 6 years old. As a result thereof, while PEDIASURE.RTM. may meet the National Academy of Sciences-National Research Council (NAS-NRC) Recommended Daily Allowances (RDAs) for children 1 to 6 years old in 1000 calories, it requires 1300 calories to meet the RDA of children ages 7 to 10 years.

Therefore, a need exists for a nutritional formula designed to meet the nutritional needs of a larger base of pediatric patients as well as pediatric patients recovering from trauma, post-surgical as well as from moderate traumatic injuries and burns.

SUMMARY OF THE INVENTION

The present invention provides a nutritional composition designed for pediatric patients. Additionally, the present invention provides a method for providing nutrition to a pediatric patient. The present invention also provides a method for providing nutrition to a pediatric patient requiring nutritional support as a result of trauma, burns, post-surgery, cerebral and the like.

In an embodiment, the present invention provides an enteral composition designed for pediatric patients. The enteral composition includes: a protein source comprising approximately 10% to 14% of the total calories; a carbohydrate source; and a lipid source comprising a mixture of medium and long chain triglycerides, wherein at least 25% of the lipid source are medium chain triglycerides.

In an embodiment, the protein source comprises casein, and whey, and in a most preferred embodiment comprises about 50% casein and 50% whey to improve the rate of gastric emptying and reduce the incidence of gastric reflux as compared to diets containing only casein or predominantly casein. The protein should also provide a rich source of cysteine and preferably contains about 0.15% of calories as cysteine (about 350 mg/1000 calories).

In an embodiment, the carbohydrate source is either maltodextrin, e.g., corn starch and sucrose. The carbohydrate source comprises approximately 40% to 60% of the total calories of the composition.

In an embodiment, the lipid source comprises approximately 30% to 40% of the total calories of the composition.

In an embodiment, long chain triglycerides of the lipid source are selected from the group consisting of soy oil, canola oil, residual milk fat, and soy lecithin.

In an embodiment, the composition further comprises an omega-3 to omega-6 fatty acid ratio of approximately 4:1 to 6:1.

Still further, in an embodiment, the composition includes at least 100% of the NAS-NRC RDA for children of all vitamins and minerals in 100 kcals.

The present invention also provides a method for providing nutrition to a pediatric patient. The method comprises the step of administering to the patient a therapeutically effective amount of a composition comprising: a protein source comprising approximately 10% to 14% of the total calories; a carbohydrate source; and a lipid source comprising a mixture of medium and long chain triglycerides. The lipid source includes an omega-3 to omega-6 fatty acid ratio of approximately 4:1 to 6:1 and medium chain triglycerides comprise at least 25% of the lipid source.

Still further, the present invention provides a method for providing nutrition to a pediatric patient with moderate needs for tissue repair recovering from trauma, burns or surgery or suffering from cerebral palsy. The method comprises the step of administering to the patient a therapeutically effective amount of an enteral composition comprising: a cysteine-rich protein source; a carbohydrate source; and a lipid source. The protein source comprises approximately 10% to 14% of the total calories of the composition. The lipid source comprises a mixture of medium and long chain triglycerides. The medium chain triglycerides make up at least 25% of the lipid source.

An advantage of the present invention is that it provides a nutritional composition that is ready-to-use, nutritionally complete, and contains proteins, lipids, carbohydrates and vitamins and minerals in proportions appropriate for children ages 1-10 years.

Moreover, an advantage of the present invention is that it provides a nutritional diet for tube and oral use designed for optimal tolerance and absorption in children ages 1-10 years.

Another advantage of the present invention is that it provides a composition including a protein source in a percentage that is adequate to support growth and moderate needs for tissue repair without imposing an undue nitrogen burden on renal function.

Furthermore, an advantage of the present invention is that it provides a composition utilizing hydrolyzed whey protein, medium chain triglycerides and maltodextrin to enhance absorption and reduce intolerance.

Yet another advantage of the present invention is that it includes beta-carotene, thereby allowing for the maintenance of plasma beta-carotene concentration in the pediatric patient.

Still another advantage of the present invention is that it possesses appropriate amounts of electrolytes including sodium, potassium and chloride without imposing an undesirable renal solute burden on kidney function.

Additional features and advantages of the present invention are described in, and will be apparent from, the detailed description of the presently preferred embodiments.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

Nutritional support of hospitalized children requires prevention, recognition, and treatment of the nutritional depletion that may occur with illness. The goals of nutritional support include stabilizing metabolic state, maintaining body mass, and/or facilitating growth and promoting tissue repair in the presence of disease and/or trauma.

While nutritional deficiency diseases are unusual in our culture today, other disease states exist that alter intake, absorption or metabolism. As set forth above, certain health conditions can impair the nutrient absorption and/or reduce gastrointestinal tolerance for diets which are based on whole proteins, long-chain fatty acids and/or complex carbohydrates.

The inventors believe that the enteral diet of the present invention when administered to pediatric patients actively undergoing tissue repair and healing will provide adequate nutritional support to such patients. Specifically, the inventors believe that the use of the composition of the present invention containing specific protein, carbohydrate and fat sources as well as a source of vitamins and minerals provides an effective nutritional support for pediatric patients.

The protein source of the present invention provides approximately 10% to 14% of the total calories of the composition. In an embodiment, the protein source comprises approximately 12% of the total calories of the composition. This protein concentration chosen is adequate to support growth and moderate needs for tissue repair without imposing an undue nitrogen burden on renal function for children ages 1-10 years.

The protein source comprises a mixture of casein and whey proteins. The whey protein may be present in whole or in hydrolyzed forms. In an embodiment, the protein source comprises about 50% casein and about 50% whey protein. In an embodiment, the hydrolyzed protein source is hydrolyzed whey. The protein source of the present composition reduces the incidence of gastric reflux because gastric emptying is faster than with diets containing casein or predominantly casein. Also, whey protein serves as a rich source of the amino acid cysteine. Cysteine is a limiting amino acid for the formation of glutathione, and glutathione needs may be higher in children with infectious or inflammatory conditions. In an embodiment, the composition of the present invention contains approximately 0.15% of calories as cysteine (approximately 350 mg per 1000 calories).

Carbohydrates provide approximately 40% to 60% of the caloric content of the composition. In an embodiment, the carbohydrate source is approximately 51% of the caloric content of the composition. A number of carbohydrates can be used including maltodextrin, hydrolyzed corn starch and/or sucrose.

The lipid source includes a mixture of medium chain triglycerides (MCT) and long chain triglycerides (LCT). The lipid source of the present invention is approximately 30% to about 40% of the caloric content of the composition. In an embodiment, the lipid source of is approximately 37% of the caloric content of the composition. The lipid profile is designed to meet essential fatty acid needs (omega-3 and omega-6), and in an embodiment comprises about 12.6% of essential fatty acids based on total calories.

The lipid source includes at least 20-30% of medium chain triglycerides. In an embodiment, MCTs make up at least 25% of the lipid source.

Suitable sources of long chain triglycerides are canola oil, soy oil, residual milk fat, and soy lecithin.

The lipid profile containing such long chain triglycerides is designed to have a polyunsaturated fatty acid omega-6 (n-6) to omega-3 (n-3) ratio of approximately 4:1 to 6:1. In an embodiment, the n-6 to n-3 fatty acid ratio is approximately 5:1. Both the omega-6 and omega-3 fatty acids are provided in sufficient quantity to meet tissue growth maintenance needs. To this end, in an embodiment, the source of omega-6 fatty acids is present in a range of approximately 4-12% of the total calories. The omega-3 fatty acid source is preferably present in the range of approximately 0.8-3.0% of the total calories. In addition to the absorption/tolerance benefits of a moderate LCT content, the composition of the present invention is less likely to be immunosuppressive due to the low percentage of omega-6 fatty acids.

By way of example, and not limitation, an example of a fatty acid lipid profile that may be used in the composition of the present invention is as follows:

TABLE 1 ______________________________________ Lipid Component For Pediatric Nutritional Composition (42.0 grams/liter) COMPONENT % of Lipids Grams/Liter ______________________________________ C6:0 0.6 0.3 C8:0 14.0 5.9 C10:0 6.7 2.8 C12:0 0.3 0.1 C14:0 0.4 0.2 C16:0 6.4 2.7 C18:0 2.2 0.9 C20:0 0.5 0.2 TOTAL SAT 31.1 13.1 C16:1 0.4 0.2 C18:1 24.1 10.1 C20:1 0.3 0.1 TOTAL MONO 24.8 10.4 C18:2 n6 27.8 11.7 C18:3 n3 5.7 2.35 TOTAL POLY 33.5 14.05 TOTAL FA'S 89.4 37.55 NON-FA'S 10.6 4.45 TOTAL ALL 100.0 42.0 ______________________________________ P/S Ratio = 1.1; (Saturated includes MCT) N6 = 27.8% of fat (22.7 g/L) 10.5% of total calories N3 = 5.7% of fat (2.35 g/L) 2.1% of total calories N3 to N6 Ratio - 5.0:1

______________________________________ FAT SOURCE % BY WT % TOTAL KCAL ______________________________________ MCT 25% 8.7& CANOLA 24% 9.1% SOY 43% 16.2% MILK* 3% 1.1% SOY LECITHIN 5% 1.9% TOTAL = 100% 37.0 ______________________________________ *Residual milk fat (with the casein and whey protein) contributes to the total lipid content

Still further, the present invention, in an embodiment, includes a specialized vitamin and mineral profile. The composition includes a source of vitamins and minerals providing at least 100% of the NAS-NRC Recommended Daily Allowance for children. The vitamin and mineral requirements are met in 1000 kcal per day because this intake is practical, achievable and easily tolerated by children ages 1-10 years, even though it is somewhat less than healthy children normally eat. Unlike prior compositions, the composition of the present invention meets NAS-NRC RDAs for children ages 1-10 years in 1000 calories. The high vitamin and mineral concentration of the present invention is of practical benefit because typical feeding regimens (e.g. 50 mL/hour for 20 hours/day) will meet all needs. However, none of the vitamin or mineral concentrations are so high that there is any risk of approaching toxic levels, even at 2000-2500 kcal per day.

In an embodiment, the composition of the present invention includes a source of beta-carotene. The inventors view beta-carotene, formerly considered only as a precursor to vitamin A, as an important nutrient with anti-oxidant properties. In an embodiment, the composition includes approximately 0.5-2.0 mg of beta-carotene per 1000 calories. This amount of beta-carotene is sufficient to maintain plasma beta-carotene concentration in the pediatric patient.

The composition of the present invention, in an embodiment, includes certain electrolyte concentrations. The electrolyte concentrations are set to meet needs without providing an undue renal solute burden on kidney function. To this end, sodium is preferably present in a range of approximately 420-500 mg/L. In an embodiment, potassium and chloride are present at ranges of approximately 1260-1380 mg/L and 1040-1120 mg/L, respectively. The renal solute load is, in an embodiment, present in a range of approximately 200-210 Mosm. In a preferred embodiment, the electrolyte concentrations of the present invention are as follows: sodium is present at 460 mg/L; potassium is present at 1320 mg/L; chloride is present at 1080 mg/L; and the renal solute load is at 205 Mosm.

The composition of the present invention is a ready-to-use enteral formulation. The composition can be used as a supplement or for total enteral nutritional support. The composition can be tube-fed to a patient, or fed by having the patient drink same. Preferably, the caloric density of the composition is 1.0 kcal/ml. Various flavorants, fibers and other additives may also be present in the compositions of this invention.

The composition of the present invention can be used for providing nutrition to a pediatric patient ages 1 to 10 years. Likewise, the composition can be used for providing nutrition to a pediatric patient recovering from surgery, burns or trauma. The diet utilizes a significant amount of whey protein, medium chain triglycerides and maltodextrin to enhance absorption and reduce intolerance.

By way of example, and not limitation, suitable compositions in accordance with this invention and that may be used pursuant to the present invention are as follows:

EXAMPLES 1-2

In accordance with this invention, new and improved pediatric enteral nutritional compositions comprise the following ingredients: protein: casein and whey; carbohydrate: maltodextrin and sucrose; lipid: canola oil, soy oil, coconut oil (MCT), residual milk fat, soy lecithin; water; vitamin A (retinol); beta-carotene; vitamin D, vitamin E; vitamin K; vitamin C; thiamine B.sub.1 ; riboflavin B.sub.2 ; niacin; vitamin B.sub.6 ; folic acid; pantoth acid; vitamin B.sub.12 ; biotin; choline; taurine; L-carnitine; inositol; calcium; phosphorus; magnesium; zinc; iron; copper; manganese; iodine; sodium; potassium; chloride; chromium; molybdenum; and selenium. Example 1 shows the composition which does not contain added dietary fiber. Example 2 shows the composition and contains fiber.

The composition of the present invention has the following nutrient composition (per 1000 calories):

TABLE 2 __________________________________________________________________________ Pediatric Enteral Nutritional Compositions COMPOSITION (Per Liter) UNITS EXAMPLE 1 EXAMPLE 2 __________________________________________________________________________ Cal. Density Kcal/ml 1.0 1.0 Cals./Can Calories 250 250 PROTEIN G/L (% Kcal) 30.0 (12%) 30.0 (12%) Casein 50% 50% Whey 50% 50% CARBOHYDRATE G/L (% Kcal) 127.5 (51%) 127.5 (51%) Maltodextrin 66% 66% Sucrose 34% 34% FIBER G/L 0.5 6.0 LACTOSE CONTENT G/L 1.5 1.5 "Lactose Free".sup.1 Yes Yes FAT G/L (% Kcal) 42.0 (37%) 42.0 (37%) % by weight Soy oil 43% 25% MCT 25% 25% Canola oil 24% 24% Soy Lecithin 5% 5% Residual milk fat 3% 3% G/L & (% of Total Kcal) MCT 10.5 (8.7%) 10.5 (8.7%) Linolenic (N6) 11.7 (10.5%) 11.7 (10.5%) Linoleic (N3) 2.35 (2.1%) 2.35 (2.1%) N6:N3 ratio 5.0:1 5.0:1 OSMOLALITY MOSM 350 350 RENAL SOLUTE LOAD MOSM/L 205 205 MCT:LCT RATIO 25:75 25:75 VOLUME TO MEET OR EXCEED NAS-NRC RDA 1.0 L 1.0 L DENSITY G/ML 1.057 1.060 WATER ML/L 850 (85%) 840 (84%) VISCOSITY CP CAL/gN Ratio 210:1 210:1 NPC/gN Ratio 185:1 185:1 __________________________________________________________________________ .sup.1 "Lactose Free" defined as <0.5 grams per serving.

EXAMPLES 3-4

The new and improved pediatric nutritional compositions may be provided in storage stable, ready to use, liquid form in cans or in retort processes screw-off topped containers. Examples 3-4 show the formulations for 250 mL cans and one liter containers with respect to NAS-NRC recommended dietary allowances for children 7-10 years of age as follows:

TABLE 3 __________________________________________________________________________ Pediatric Nutritional Formulations in 250 mL and 1 L Containers NUTRITION AMOUNT per AMOUNT % NAS- COMPOSITION UNITS NAS-RC* 250 mL can % NAS-NRC per Liter NRC __________________________________________________________________________ Calories KCAL -- 250 ** 1000 ** Protein G 28.0 7.5 27 30.0 107 Carbohydrate G -- 31.9 ** 127.5 ** Fat*** G -- 10.5 ** 42.0 ** Water ML -- 212 ** 850 ** Vitamin A**** I.U. 2330 600 26 2400 103 Beta-Carotene MG ** 0.25 ** 1.0 ** Vitamin D I.U. 400 140 35 560 140 Vitamin E I.U. 7 7 100 28 400 Vitamin K MCG ** 7.5 ** 30 ** Vitamin C MG 45 25 55 100 220 Thiamine B.sub.1 MG 1.0 0.6 60 2.4 240 Riboflavin B.sub.2 MG 1.2 0.5 42 2.0 167 Niacin MG 13 5 38 20 154 Vitamin B.sub.6 MG 1.4 0.6 43 2.4 171 Folic Acid MCG 100 100 100 400 400 Pantoth. Acid MG ** 2.5 ** 10 ** Vitamin B.sub.12 MCG 1.4 1.5 107 6 428 Biotin MCG ** 75 ** 300 ** Choline MG ** 75 ** 300 ** Taurine MG ** 20 ** 80 ** L-Carnitine MG ** 10 ** 40 ** Inositol MG ** 20 ** 80 ** Calcium MG 800 250 31 1000 125 Phosphorus MG 800 200 25 800 100 Magnesium MG 170 50 29 200 118 Zinc MG 10 3.8 38 15 150 Iron MG 10 3.5 35 14 140 Copper MG ** 0.25 ** 1.0 ** Manganese MG ** 0.4 ** 1.5 ** Iodine MCG 120 30 25 120 100 Sodium MG ** 115 ** 460 ** Potassium MG ** 330 ** 1320 ** Chloride MG ** 270 ** 1080 ** Chromium MCG ** 7.5 ** 30 ** Molybdenum MCG ** 7.5 ** 30 ** Selenium MCG 30 7.5 25 30 100 __________________________________________________________________________ *NAS-NRC recommended dietary allowances for children 7-10 years of age ** NASNRC RDA not established

EXAMPLE 5

Another pediatric nutritional composition of the present invention is shown in the following Example 5. Table 4 shows a comparison of the composition of Example 5 with the NAS-NRC RDAs and with a prior pediatric formulation, PEDIASURE.RTM. available from Ross Laboratories, as follows:

TABLE 4 __________________________________________________________________________ Comparison of Compositions of This Invention (Example 5) with PEDIASURE .RTM. and NAS-NRC RDAs (Per 1000 Calories) NAS-NRC RDAs NUTRIENT COMPOSITION UNITS PEDIASURE .RTM. 1-3 Yrs 4-6 Yrs 7-10 Yrs Example 5 __________________________________________________________________________ CAL DENSITY Kcal/mL 1.0 ** ** ** 1.0 PROTEIN G (%) 30.0 (12%) 16 24 28 30.0 (12%) Casein 82% 50% Whey 18% 50% CARBOHYDRATE G (%) 109.7 (44%) ** ** ** 127.5 (51%) FAT G (%) 49.7 (44%) ** ** ** 42.0 (37%) Safflower Oil 50% -- Canola Oil -- 24% Soy Oil 30% 43% MCT 20% 25% Residual Milk Fat -- 3% Soy Lecithin 5% 5% N6:N3 Ratio 9:1 5:1 FIBER G 5.0 ** ** ** 6.0 or 0.0 WATER ML 844 ** ** ** 840 or 850 VITAMIN A (RETINOL) IU 2570 1325 1665 2330 2400 BETA-CAROTENE MG 0 ** ** ** 1.0 VITAMIN D IU 510 400 400 400 560 VITAMIN E IU 23 6 7 7 28 VITAMIN K MCG 38 ** ** ** 30 VITAMIN C MG 100 40 45 45 100 THIAMINE B.sub.1 MG 2.7 0.7 0.9 1.0 2.4 RIBOFLAVIN B.sub.2 MG 2.1 0.8 1.1 1.2 2.0 NIACIN MG 17 9 12 13 20 VITAMIN B.sub.6 MG 2.6 1.0 1.1 1.4 2.4 FOLIC ACID MCG 370 50 75 100 400 PANTOTH. ACID MG 10 ** ** ** 10 VITAMIN B.sub.12 MCG 6 0.7 1.0 1.4 6 BIOTIN MCG 320 ** ** ** 300 CHOLINE MG 300 ** ** ** 300 TAURINE MG 72 ** ** ** 80 L-CARNITINE MG 17 ** ** ** 40 INOSITOL MG 80 ** ** ** 80 CALCIUM MG 970 800 800 800 1000 PHOSPHORUS MG 800 800 800 800 800 Ca:P Weight 1.21:1 1.00:1 1.00:1 1.00:1 1.25:1 MAGNESIUM MG 200 80 120 170 200 ZINC MG 12 10 10 10 15 IRON MG 14 10 10 10 14 COPPER MG 1.0 ** ** ** 1.0 MANGANESE MG 2.5 ** ** ** 1.5 IODINE MCG 97 70 90 120 120 SODIUM MG 380 ** ** ** 460 POTASSIUM MG 1310 ** ** ** 1320 CHLORIDE MG 1010 ** ** ** 1080 Na:K Molar 0.49:1 ** ** ** 0.59:1 (Na + K)/C Molar 1.75 ** ** ** 1.71 chromium mcg 30 ** ** ** 30 MOLYBDENUM MCG 36 ** ** ** 30 SELENIUM MCG 23 20 20 30 30 __________________________________________________________________________

It will be understood that various modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present invention and without diminishing its attendant advantages. It is therefore intended that such changes and modifications be covered by the appended claims.