3.2 Nutrition Across the Lifespan & Maternal-Infant Wellness
Key Takeaways
Maternal preconception folic acid supplementation (400 mcg daily for low-risk, 4-5 mg daily for women with prior neural tube defects or anticonvulsant therapy) and exclusive breastfeeding for the first 6 months form critical foundations of maternal-infant wellness.
Kwashiorkor results from severe protein deficiency with edema, hepatomegaly, and 'flaky paint' dermatosis, whereas Marasmus manifests as severe calorie starvation with total wasting ('skin and bones') without edema.
Inpatient stabilization of severe acute malnutrition (SAM) mandates ReSoMal for gentle rehydration, withholding iron during acute stabilization, and starting cautious feeding with F-75 formula to prevent fatal refeeding syndrome.
Nutritional management of chronic conditions requires sodium restriction (<2,000 mg/day) and desalting traditional Caribbean salted meats for hypertension, the Plate Method and complex starches for diabetes, and protein/potassium titration in renal disease.
Nutrition Across the Lifespan & Maternal-Infant Wellness
Nutritional adequacy across every life stage is essential for growth, metabolic balance, and disease prevention. Caribbean community nurses manage diverse priorities, from antenatal micronutrient support and infant feeding to malnutrition rehabilitation and chronic disease medical nutrition therapy.
Maternal Nutrition, Breastfeeding & Complementary Weaning
Maternal Requirements in Preconception & Pregnancy
- Energy & Protein: Pregnancy requires an extra 300–350 kcal/day in trimester two and 450 kcal/day in trimester three, with protein increasing by 25 g/day (~71 g/day total) for fetal-placental growth.
- Folic Acid: Critical for neural tube closure by day 28 post-conception. Standard low-risk guidance requires 400 mcg (0.4 mg) daily from one month preconception through trimester one. High-risk women (prior neural tube defect pregnancy, pre-gestational diabetes, or anticonvulsant therapy) require 4 to 5 mg (4,000–5,000 mcg) daily from 3 months preconception through 12 weeks gestation.
- Iron & Calcium: Plasma expansion causes physiological dilutional anemia. Antenatal clinics provide 30–60 mg elemental iron with 400 mcg folic acid daily. Anemia in pregnancy (Hb <11.0 g/dL in trimesters 1/3, <10.5 g/dL in trimester 2) requires therapeutic iron (120–200 mg elemental daily) taken with Vitamin C, avoiding dairy, tea, and coffee within 2 hours. WHO recommends calcium supplements (1.5–2.0 g elemental calcium daily) for pregnant women whose diet is low in calcium, to reduce the risk of pre-eclampsia.
Exclusive Breastfeeding (EBF) & Weaning
The WHO, UNICEF, and Jamaican Ministry of Health mandate exclusive breastfeeding for the first 6 months (180 days), withholding water, formula, glucose feeds, and bush teas.
- Colostrum: Secreted during days 1–4 postpartum. Rich in secretory Immunoglobulin A (sIgA), lactoferrin, and leukocytes, colostrum establishes mucosal immunity and accelerates meconium passage, clearing bilirubin to reduce neonatal jaundice.
- Maternal Benefits: Oxytocin release accelerates uterine involution and reduces postpartum hemorrhage; supports child spacing via the Lactational Amenorrhea Method (LAM) when exclusive breastfeeding, amenorrhea, and infant age <6 months coincide; decreases lifetime risks of breast/ovarian cancer and diabetes.
- Contraindications and special cases: Maternal HIV (follow the national PMTCT feeding policy and avoid mixed feeding; see Section 3.5), active untreated sputum-positive tuberculosis (infant receives expressed milk), cytotoxic chemotherapy, substance abuse, and infant galactosemia.
- Complementary Feeding: Begins at 6 months as digestive capacity and motor skills (loss of extrusion reflex, upright sitting) mature. Introduce single, iron-rich Caribbean staples—callaloo, pumpkin, sweet potato, peas, avocado, egg yolk, fish—at 3- to 5-day intervals to detect allergies. Avoid cow's milk before 12 months (excess renal solute load, occult GI bleeding) and honey before 12 months (Clostridium botulinum infant botulism risk).
Protein-Energy Malnutrition (PEM): Kwashiorkor vs. Marasmus
Protein-energy malnutrition represents severe pediatric nutrient deprivation:
| Clinical Feature | Kwashiorkor | Nutritional Marasmus |
|---|---|---|
| Primary Etiology | Severe protein deficiency with adequate carbohydrate | Severe deficiency of both calories and protein (starvation) |
| Edema | Marked bilateral pitting edema from hypoalbuminemia (<2.0 g/dL) | Completely absent |
| Appearance | Plump, swollen body masking muscle wasting; "moon face" | Severe emaciation ("skin and bones"); visible ribs; "old man" facies |
| Subcutaneous Fat | Relatively preserved or mild loss | Completely depleted; loose skin folds ("baggy pants" sign) |
| Liver Status | Hepatomegaly (fatty infiltration from apolipoprotein failure) | Normal liver size |
| Skin & Hair | "Flaky paint" dermatosis; dyspigmented hair ("flag sign") | Dry, thin, wrinkled skin; normal hair pigmentation |
| Behavior / Appetite | Apathetic, miserable, severe anorexia | Alert, anxious, ravenously hungry |
WHO 10-Step Inpatient Management of Severe Acute Malnutrition (SAM)
- Hypoglycemia: 10% dextrose orally/IV, then immediate feeds.
- Hypothermia: Warm clothing, wrap head, room >25°C.
- Dehydration: Administer ReSoMal (low sodium 45 mmol/L, high potassium/magnesium) at 5 mL/kg every 30 minutes for 2 hours. Standard WHO-ORS is contraindicated (high sodium induces heart failure).
- Electrolytes: Extra potassium and magnesium; no extra sodium.
- Infection: Empiric broad-spectrum antibiotics (ampicillin plus gentamicin).
- Micronutrients: Vitamin A, folic acid, zinc. Withhold iron until rehabilitation, as free iron promotes bacterial proliferation.
- Starter Feeds: Low-protein F-75 formula (75 kcal/100 mL) in small frequent volumes to prevent refeeding syndrome.
- Catch-Up Growth: Transition to F-100 formula (100 kcal/100 mL) or RUTF once appetite returns.
- Sensory Stimulation: Structured developmental play and bonding.
- Discharge Planning: Community nurse follow-up.
Micronutrient Deficiencies & Chronic Disease Nutrition
- Iron Deficiency Anemia (IDA): Conjunctival/palmar pallor, spoon nails (koilonychia), glossitis, fatigue, pica, low MCV (<80 fL), low ferritin (<15 mcg/L). Promote heme iron (liver, fish, poultry) and non-heme iron (callaloo, beans) paired with Vitamin C; eliminate tea/coffee at meals.
- Iodine Deficiency: Causes endemic goiter, hypothyroidism, and fetal cretinism (severe intellectual disability, deaf-mutism, dwarfism). Prevented by universal table salt iodization.
- Vitamin A Deficiency: Nyctalopia (night blindness), conjunctival xerosis, Bitot's spots (foamy triangular plaques), keratomalacia, and elevated measles mortality. Controlled with oral high-dose Vitamin A (100,000 IU at 6–11 months, 200,000 IU every 4–6 months for 12–59 months).
- Hypertension Management: DASH diet with sodium restricted to <2,000 mg/day (<5 g salt / ~1 level teaspoon), or <1,500 mg in severe hypertension. Educate clients to boil and desalt salted fish, avoid canned corned beef, and replace bouillon cubes/seasoned salt with fresh scallion, thyme, pimento, garlic, and peppers.
- Type 2 Diabetes Mellitus: Caribbean Plate Method: half plate non-starchy vegetables (callaloo, cabbage, pak choi), one-quarter lean protein (fish, skinless chicken, legumes), and one-quarter low glycemic index complex starches (boiled green bananas, sweet potatoes, oats). Eliminate sweetened condensed milk, sodas, and syrups.
- Chronic Kidney Disease (CKD): Restrict protein (0.6–0.8 g/kg/day) in pre-dialysis; increase protein (1.2–1.4 g/kg/day) in hemodialysis. Restrict potassium (<2,000 mg/day) in oliguric CKD by avoiding coconut water, ripe bananas, oranges, plantains, and callaloo, and by leaching root vegetables. Restrict phosphorus (800–1,000 mg/day) with mealtime phosphate binders; restrict fluids (urine output + 500 mL) and sodium (<2,000 mg/day).
A 2-year-old child is admitted to the pediatric ward with severe generalized edema of the lower extremities, hands, and face. The child is miserable, apathetic, and displays an enlarged, palpable liver and alternating bands of light and dark discoloration in the hair ('flag sign'). The child's weight-for-age is 75% of the median due to fluid retention. Which diagnosis does the nurse identify?
Congenital Nephrotic Syndrome
Kwashiorkor
Biliary Atresia
Nutritional Marasmus
A 14-month-old infant with severe acute malnutrition and bilateral pedal edema is admitted with clinical signs of moderate dehydration secondary to watery diarrhea. The nurse prepares to administer fluid therapy. Which rehydration solution is indicated according to the World Health Organization (WHO) management guidelines?
ReSoMal by mouth or nasogastric tube at 5 mL/kg every 30 minutes for the first 2 hours.
Intravenous 0.9% Normal Saline bolus at 20 mL/kg infused over 15 minutes, repeated until the pulse improves.
Intravenous 5% Dextrose in Water with 40 mEq/L potassium chloride at maintenance rate.
Standard WHO Oral Rehydration Salts (75 mmol/L sodium) at 20 mL/kg/hour orally until the diarrhoea settles.
A 26-year-old woman presents to the primary care health centre for preconception counseling. She has a history of an earlier pregnancy that resulted in an infant born with an open neural tube defect (myelomeningocele). What is the recommended daily folic acid supplementation dose for this client, and when should it be initiated?
800 mcg daily initiated at 12 weeks of gestation once the pregnancy is confirmed by scan.
400 mcg daily initiated as soon as a home pregnancy test is positive, continued to delivery.
1,000 mcg daily initiated during the second trimester of pregnancy.
4 to 5 mg daily from 1 to 3 months before conception through the first trimester.
A community health nurse is conducting dietary education for a Caribbean client diagnosed with Stage 2 essential hypertension. The client frequently consumes traditional salted fish and canned corned beef. Which instruction is most critical for reducing dietary sodium intake?
Use sea salt or seasoned salt instead of table salt, as organic salt crystals do not elevate systemic blood pressure.
Switch from canned corned beef to canned cured sausages, as poultry-based canned meats contain no added sodium.
Desalt salted fish by boiling in changes of fresh water, and season with fresh herbs instead of bouillon cubes.
Limit total daily fluid intake to 800 mL to prevent vascular volume expansion regardless of sodium consumption.
Sections you finish are checked off in the contents.