Diarrhoea is the passage of more than three loose or liquid stools in 24 hours. It is important to understand that diarrhoea is a symptom, not a disease itself. It is the body's natural defence mechanism to flush out harmful germs, toxins, or irritants from the gastrointestinal tract.

• Their immune systems are still developing.
• They have not yet built immunity to many common germs.
• They explore their environment by putting things in their mouths (hand-to-mouth stage).
• Their gut microbiome is still maturing.

Most episodes of acute diarrhoea last a few days to one week. Diarrhoea is often accompanied by:

• Fever: The body's systemic response to fighting infection.
• Nausea and vomiting: Due to stomach irritation (gastroenteritis).
• Abdominal cramps: Gut muscles contracting violently (hypermotility) to push out contents.
• Dehydration: The most dangerous complication, caused by the loss of too much water and vital electrolytes (sodium, potassium).

To truly understand diarrhoea, you must know the two main mechanisms:

1. Secretory Diarrhoea: Toxins (like from Cholera or E. coli) force the gut cells to actively pump chloride and water into the gut lumen. The gut is "weeping" fluid.
2. Osmotic Diarrhoea: Viruses (like Rotavirus) destroy the tips of the gut villi. The child cannot absorb nutrients (like lactose). These unabsorbed nutrients stay in the gut and act like a sponge, pulling water out of the body and into the stool.

These are the most common causes of diarrhoea in children.

• Rotavirus: The leading cause of severe diarrhoea in infants and young children worldwide. It is highly contagious and spreads through the faecal-oral route (contaminated hands, surfaces, food, or water). It causes watery diarrhoea, vomiting, and fever, and can lead to severe dehydration. (Prevention note: The Rotarix vaccine given at 6 and 10 weeks has drastically reduced these numbers in Uganda).
• Norovirus: Often called the "winter vomiting bug." It spreads rapidly in crowded places like schools and hospitals. Causes sudden onset of vomiting and diarrhoea.
• Adenovirus: Another common viral cause, particularly in children under 2 years.

Bacteria cause diarrhoea by invading the gut lining (causing inflammation and bleeding) or by producing toxins that force the gut to secrete water.

These are systemic infections where the germ is not in the gut, but the body responds with diarrhoea as part of the illness.

Exclusive breastfeeding is recommended for the first 6 months of life. Early weaning (starting solids before 6 months) causes diarrhoea because:

• The infant's gut is immature – digestive enzymes are not fully developed to handle complex foods.
• The gut lining is permeable – allowing undigested proteins to pass through, causing irritation and allergies.
• Poor hygiene during food preparation leads to contamination.
• Bottle feeding is particularly risky because bottles are notoriously difficult to clean properly, and bacteria multiply rapidly in leftover milk trapped in the teat.

Peak age: 6 to 18 months – when most mothers start weaning and children begin crawling and exploring.

• A. Malnutrition: Kwashiorkor (protein deficiency) and Marasmus (severe calorie deficiency) both cause severe atrophy (shrinking) of the gut lining. This leads to malabsorption diarrhoea – a vicious cycle where diarrhoea worsens malnutrition, and malnutrition worsens diarrhoea.
• B. Indigestible Foods: Foods like sorghum, maize, and fibrous vegetables are difficult for young children to digest. Herbs and traditional remedies given to infants can severely irritate the delicate gut lining.

• Caused by toxins produced by bacteria in contaminated food (not the live bacteria invading the gut).
• Rapid onset: Usually within 2-6 hours of eating.
• Symptoms: Sudden vomiting, diarrhoea, sometimes fever. Usually resolves within 24 hours as the body naturally clears the toxin.
• Common sources: Reheated rice (Bacillus cereus), undercooked meat, contaminated salads.

In many Ugandan communities, certain deeply rooted beliefs exist about diarrhoea causes. As nurses, we must respectfully educate while understanding these beliefs:

Nursing Role: Never dismiss cultural beliefs rudely. Explain the scientific cause while acknowledging the community's concerns to build trust.

1. Locate the skin on the child's abdomen (side of the belly, halfway between umbilicus and flank).
2. Pinch the skin and subcutaneous fat between your thumb and forefinger for 1-2 seconds.
3. Release and observe how quickly it returns to normal.
4. Immediate return (<2 seconds): Normal hydration.
5. Slow return (2+ seconds): Some dehydration.
6. Very slow return (>5 seconds): Severe dehydration.

Goal: Prevent dehydration and treat at home.

Goal: Rehydrate with ORS over 4 hours in a health facility.

You cannot just give plain water to a severely dehydrated child; it won't be absorbed fast enough. ORS contains exact ratios of Sodium and Glucose. In the gut wall, there is a special pump called the SGLT-1 (Sodium-Glucose Linked Transporter). This pump ONLY works if it grabs one molecule of sodium and one molecule of glucose at the exact same time. When it pulls them into the blood, water follows rapidly by osmosis! This is why adding sugar to salt water saves lives.

• If the child wants more ORS than the calculated volume, give more.
• For infants under 6 months who are not breastfeeding, also give 100–200 ml of clean water to prevent hypernatremia.
• Give frequent small sips from a cup or spoon (do not use bottles).
• If the child vomits, wait 10 minutes, then continue more slowly.
• Continue breastfeeding whenever the child wants.

• Reassess the child using LOOK and FEEL.
• Reclassify dehydration status.
• Choose Plan A (if resolved), Plan B (if still some dehydration), or Plan C (if worsened) accordingly.

• If child is 6 months or older, give freshly prepared foods.
• Cereal or starchy food mixed with pulses, vegetables, meat/fish.
• Add 1–2 teaspoons of vegetable oil to each serving (for dense calories).
• Fresh fruit juice or mashed banana (to replenish lost potassium).
• Offer food at least 6 times a day.
• After diarrhoea stops, give an extra meal a day for 2 weeks to catch up on lost nutrition.

⚠️ THIS IS A MEDICAL EMERGENCY

• Start IV fluids IMMEDIATELY.
• If no IV access can be secured, pass a nasogastric tube (NGT) and give ORS at 20ml/kg/hr, or consider intraosseous (IO) access.
• Transfer to hospital URGENTLY if at a lower-level clinic.
• Encourage mother to continue giving ORS by mouth during transport if the child can drink.

• Reassess every 1–2 hours. Check radial pulse, consciousness, and breathing.
• If hydration status is not improving, increase the IV drip rate.
• Give ORS by mouth (5 ml/kg/hour) as soon as child can drink safely without choking – usually after 3–4 hours for infants, or 1–2 hours for older children.
• Reassess completely after 6 hours (infants) or 3 hours (children). Reclassify and choose appropriate plan (A, B, or C).

• Monitor vital signs every 15 minutes until a strong pulse is present.
• Investigations: Stool microscopy and culture, blood slide for malaria.
• Administer antibiotics only if bacterial infection (like bloody dysentery or cholera) is suspected or confirmed.
• Maintain nutrition: Start feeding as soon as child is stable and can eat safely.
• Infection control: Disinfect surfaces, isolate if highly infectious (e.g., Cholera/Rotavirus).

Case: A 2-year-old child weighing 12 kg is brought to the clinic. The mother states the child has had 6 watery stools today. On assessment, the child is irritable, has sunken eyes, and drinks ORS eagerly from a cup. The skin pinch goes back slowly (in 2 seconds).

1. What is the WHO classification of dehydration?
2. What Treatment Plan will you use?
3. How much ORS will you administer in the first 4 hours?

Answers:

1. Some Dehydration (Child has 3 signs: irritable, sunken eyes, drinks eagerly).
2. Plan B.
3. Looking at the table for a 12 kg, 2-year-old child: Give 800–1200 ml of ORS over 4 hours.

• Cleft Lip: A physical split or separation of the two sides of the upper lip. It appears as a gap or opening that may extend from the lip up to the base of the nose, and may involve the upper jaw bone and gum.
• Cleft Palate: A split in the roof of the mouth (the palate), which separates the mouth from the nose. It can involve the soft palate (back), hard palate (front), or both.
• Both conditions can occur on one side (unilateral) or both sides (bilateral).

During early pregnancy (weeks 4–7), the tissues that form the lip and palate fail to fuse together properly. There is not enough tissue, or the tissue does not join correctly. Specifically, the maxillary prominences fail to fuse with the medial nasal prominences. If this happens early (week 5-6), you get a cleft lip. If it happens slightly later (week 7-9) when the palatal shelves are supposed to zip together, you get a cleft palate.

• A. Feeding Problems: The palate normally seals the nasal cavity from the mouth during swallowing. With a cleft palate, milk and food can enter the nose. Babies cannot create suction on a regular nipple because air leaks through the cleft. This leads to poor intake, frustration, and inadequate nutrition.
• B. Hearing Loss: The Eustachian tube (connects middle ear to throat) does not function properly because the palatal muscles that normally pull it open are detached. Fluid builds up behind the eardrum (otitis media with effusion). This causes conductive hearing loss and recurrent ear infections. If untreated, can lead to permanent hearing damage.
• C. Dental Abnormalities: Small, missing, extra, or crooked teeth. Defects in the alveolar ridge (bone supporting teeth). Teeth may be displaced, rotated, or fail to erupt properly.
• D. Speech Difficulties: Air escapes through the nose instead of the mouth. Sounds like "p," "b," "t," "d," "k," "g" are difficult to produce (because they require building up pressure in the mouth). Speech may sound hypernasal (too much air through nose).
• E. Psychological Effects: Parents (especially mothers) may feel guilt, shame, or sadness. Older children may experience bullying or low self-esteem. Family support and counselling are essential.

Surgeons traditionally wait until the infant meets the "Rule of 10s" to ensure they can survive general anaesthesia safely:

• At least 10 weeks old
• At least 10 pounds in weight (approx 4.5 kg)
• At least 10 g/dL of Haemoglobin

Definition: Tongue tie is a congenital condition where the frenulum (the thin piece of skin connecting the underside of the tongue to the floor of the mouth) is unusually short, thick, or tight. This restricts tongue movement.

• Procedure: A quick, simple procedure where the frenulum is snipped with sterile scissors.
• Timing: Can be done in newborns (minimal pain, few nerve endings and blood vessels in the frenulum) or later if diagnosed late.
• Anaesthesia: Usually none needed in very young infants; local or general anaesthetic required for older children.
• Aftercare: Breastfeed immediately! This comforts the baby, acts as a natural analgesic, checks feeding improvement, and the sucking motion acts as gentle tongue exercises to prevent re-attachment.
• Frenuloplasty: More extensive surgical release if the frenulum is very thick or posterior – requires stitches.

• Oesophageal Atresia (OA): A congenital defect where the oesophagus (food pipe) does not form properly. The upper part ends in a blind pouch and does not connect to the stomach.
• Tracheo-Oesophageal Fistula (TOF): An abnormal connection (fistula) between the oesophagus and the trachea (windpipe). This means food and saliva can enter the lungs, or stomach acid can splash into the lungs.

During a normal pregnancy, the fetus swallows amniotic fluid, absorbs it in the gut, and urinates it back out. If the fetus has Oesophageal Atresia, it cannot swallow the fluid. Therefore, the fluid builds up excessively in the womb. A mother presenting with Polyhydramnios (too much amniotic fluid) on ultrasound is a massive red flag that the baby might have OA!

• Excessive drooling: Saliva cannot pass to the stomach; it pools in the mouth and overflows.
• Coughing, choking, cyanosis (The 3 Cs) with the first feed: Milk enters the blind pouch and instantly overflows/spills into the trachea and lungs.
• Inability to pass nasogastric tube (NGT): Key Diagnostic Test! Attempt to pass a 10F catheter through the nose into the stomach. In OA, it will hit a wall and coil in the upper oesophageal pouch at 10–12 cm.
• Respiratory distress: Aspiration of saliva/milk into lungs.
• Scaphoid (sunken) abdomen OR Bloated abdomen: Scaphoid if Type A (no air reaches stomach). Bloated if Type C (every time the baby breathes, air goes through the fistula into the stomach).

• Pre-Operative Care:
  • Suction upper pouch continuously: (Replogle tube) Prevents saliva aspiration into lungs.
  • Nurse in semi-upright position (30–45°): Crucial for Type C! Keeps stomach acid from refluxing up the lower fistula into the lungs.
  • NPO / IV fluids / Antibiotics / Warmth: Standard emergency neonatal prep.
  • Gastrostomy: A surgical opening directly into the stomach may be placed early for feeding and to decompress the stomach air.
• Surgical Management: Primary repair (thoracotomy to join the two ends and tie off the fistula) if the gap is short. Staged repair if the gap is too wide.
• Complications: Aspiration pneumonia, Oesophageal stricture (scarring at surgical site causes narrowing/dysphagia), Tracheomalacia (weak tracheal cartilage causes a "honking" seal-like cough), recurrent fistula, severe Gastro-oesophageal reflux (GOR).

Definition: Pyloric stenosis is the narrowing of the pylorus (the muscular valve at the outlet of the stomach that opens into the duodenum). This is caused by hypertrophy (thickening) and hyperplasia of the pyloric circular muscle, which completely clamps down and prevents the stomach from emptying properly.

• Males are affected 4–5 times more than females (especially first-born males).
• The pyloric muscle thickens and elongates, severely narrowing the pyloric canal.
• The stomach must work extremely hard to push food through this tiny hole. This causes the stomach muscle itself to hypertrophy, leading to visible peristaltic waves across the baby's belly.
• Eventually, the stomach fails to push milk through. The stomach fills up, and the milk is violently vomited back up.

• Diagnosis: Clinical exam (olive mass). Ultrasound is the Gold Standard – shows thickened pyloric muscle (>3–4 mm) and elongated pylorus (>14–16 mm). Barium meal X-ray shows the "String sign" (thin stream of barium squeezing through the narrowed pylorus).
• Pre-Op: NPO (Nil Per Os), NGT for gastric decompression. CRITICAL: Correct dehydration over 24-48 hours using Normal Saline with added Potassium. Never operate before correcting this!
• Surgical Management: Pyloromyotomy (Ramstedt's Procedure). A longitudinal incision is made strictly through the outer muscle layers of the pylorus, splitting it open like a hotdog bun, without cutting the inner mucosa. This widens the channel.
• Post-Op: Keep NPO until fully awake. After 6 hours, give 5ml of boiled water/glucose water. Gradually advance to breastmilk/formula. Expected outcome is excellent; baby goes home in a few days.

Definition: Imperforate anus is a congenital condition where the anus (opening for stool) is absent, narrowed, or misplaced. The rectum (last part of the large intestine) does not connect properly to the outside of the body. This is part of a spectrum of ARMs.

• Low lesions: The rectum descends fully through the pelvic floor muscles but ends just under the skin. May present as a tiny stenosis or a blind pouch where the anus should be.
• High lesions: The rectum ends high up in the pelvis, completely missing the sphincter muscles. It often forms an abnormal fistula to the bladder or urethra (in boys), or the vagina (in girls), causing stool to leak out of the genitals.
• Persistent cloaca: Most severe (only in females). The rectum, vagina, and urinary tract all fail to separate and join into a single common exit channel.

• Physical examination at birth: The most crucial step. No anal opening; anal opening in wrong place; or only a small dimple where the anus should be.
• Passage of meconium: Meconium may pass through the urethra or vagina (indicating a high fistula), or not at all.
• "Wink" reflex test: Stroking the perianal skin should cause the hidden sphincter muscles to twitch (anal wink). If absent, it indicates a high lesion missing sphincter muscles.
• Invertogram X-ray: A classic test. A coin is taped to the baby's anal dimple. The baby is held upside down for 1–2 minutes so swallowed air rises to the very end of the rectum. The X-ray shows the distance between the trapped air in the rectum and the coin on the skin (determines high vs. low lesion).
• Renal ultrasound & Echocardiogram: Mandatory to rule out VACTERL anomalies.

• Immediate Mgmt: NPO, IV fluids, NGT decompression (to prevent bowel rupture from obstruction), and IV Antibiotics (critical if stool is leaking into the urinary tract).
• Surgical Mgmt for Low Lesions: Anoplasty – surgical creation of an anus in the correct position; usually done as a single immediate procedure.
• Surgical Mgmt for High Lesions: Requires 3 stages.
  • 1. Colostomy on day 1 to save the baby's life and allow stool to exit the abdomen.
  • 2. Definitive repair (PSARP) at 3–12 months to pull the rectum down through the center of the pelvic muscles.
  • 3. Colostomy closure months later once the new anus has healed.
• Post-Op Care: Dilatation! After anoplasty, parents must dilate the new anus daily with graduated metal dilators (Hegar dilators) to prevent severe scar tissue stricture. Monitor bowel management (constipation and faecal incontinence are lifelong struggles for these children).

• Know the WHO dehydration classification perfectly – this is tested frequently.
• Understand ORS preparation (6 sugar, half salt in 1 Litre) and administration – practical exam favourite.
• Remember Plan A, B, and C – know exactly when to use each based on the "Look and Feel" signs.
• Pyloric stenosis – classic presentation: male, 2–6 weeks, projectile non-bilious vomiting, palpable "olive", metabolic alkalosis.
• Cleft palate feeding – cup/spoon feeding, Haberman bottles, upright position.
• Oesophageal atresia – Polyhydramnios in mother, 3 Cs (cough, choke, cyanosis), NGT coiling, continuous suction, surgical emergency.
• Imperforate anus – Always inspect the perineum at birth, watch for meconium in urine, check for associated VACTERL anomalies.