Lec 1: Pediatric Surgery - Neonatal Intestinal Obstruction (NIO)

NIO Overview & Pyloric Stenosis
  • High vs Low Obstruction: High obstruction presents with Early vomiting and Late distension. Low obstruction presents with Later onset of vomiting and Early distension.
  • Complications of NIO: Aspiration, Bowel gangrene/perforation, Sepsis, Enterocolitis.
  • Hypertrophic Pyloric Stenosis (HPS):
    • Presentation: Non-bilious vomiting.
    • Environmental risks: Bottle feeding, exposure to erythromycin/azithromycin (macrolides are gastrin motilin receptor agonists causing contraction - 30-fold increased risk). Breast milk contains vasoactive intestinal peptide favoring relaxation.
    • Metabolic Derangement: Hypochloremic, Hypokalemic, Hyponatremic, Metabolic Alkalosis.
    • Treatment: Resuscitation first, followed by Pyloromyotomy.
Duodenal Atresia & Malrotation
  • Duodenal Atresia:
    • Intrinsic etiology is most common (failure of recanalization of fetal duodenum).
    • Highly associated with VACTRAL anomalies: Vertebral, Anorectal, Cardiac, Tracheoesophageal, Renal, Atresia (Duodenal), Limb.
    • Diagnosis: Prenatal ultrasound. Classic presentation is bilious emesis. X-Ray shows "Double Bubble" / beak appearance with complete obstruction.
  • Midgut Malrotation & Volvulus:
    • Midgut maturation stages: (1) Herniation, (2) Rotation, (3) Retraction, (4) Fixation.
    • Presentation: Sudden onset of bilious vomiting in a previously healthy term neonate is the cardinal sign (presume malrotation with volvulus until proven otherwise).
    • Upper gastrointestinal contrast study is the gold standard showing ‘coil spring’ or ‘corkscrew’ configuration.
    • Treatment: Aggressive resuscitation and immediate surgical exploration (viable vs gangrenous bowel assessment).
  • Jejunoileal Atresia: Occurs secondary to vascular disruption during fetal life. X-ray shows few (3-5) gas-filled loops of small bowel, remainder gasless.
💡 Key Hints for MCQs
  • Pyloric Stenosis vomiting is ALWAYS Non-bilious, while Malrotation/Volvulus vomiting is Bilious.
  • Pyloric stenosis metabolic profile: Hypochloremic, Hypokalemic Metabolic Alkalosis.
  • X-ray "Double Bubble" sign = Duodenal Atresia.
  • X-ray "Corkscrew" or "Coil Spring" sign = Midgut Volvulus.
  • Macrolides (erythromycin) increase the risk of pyloric stenosis by 30-fold.

Lec 2: Pediatric Surgery - Hirschsprung & Malformations

Hirschsprung Disease (Congenital Megacolon)
  • Pathology: Developmental disorder characterized by the absence of ganglion cells in the myenteric and submucosal plexuses of the distal intestine.
  • Incidence: Approximately 1 in 5000 live-born infants.
  • Diagnosis: Water-soluble contrast enema shows a transition zone between normal and aganglionic bowel.
  • Treatment: Pull-through Procedure (removing aganglionic bowel and bringing normally innervated bowel to the anus).
Anorectal Malformations & Abdominal Wall Defects
  • Males Classification: Rectoperineal fistula, Rectourethral fistula (MOST COMMON 80%), Rectobladder neck fistula, Imperforate anus without fistula, Rectal atresia/stenosis.
  • Females Classification: Rectoperineal fistula, Rectovestibular fistula (80%), Cloaca, Imperforate anus without fistula, Rectal atresia, Rectovaginal fistula.
  • Newborn Management (Anorectal): N.P.O, Nasogastric tube, fluid resuscitation, antibiotics, search for VACTRAL. X-ray delayed until after 24 hours (swallowed air takes 16 hours to reach distal large bowel).
  • Gastroschisis Repair: Up to 70% can be managed with primary closure. If unable, proceed with silo placement (staged closure). Omphalocele may use scarification treatment.
Umbilical Hernia
  • Fascial defect is present at birth.
  • Incidence Associations: Premature and low birth weight, trisomy conditions, and congenital hypothyroidism.
  • Treatment: Very safe to observe; will close spontaneously. Wait until ages 5 to 7 years to allow natural closure to occur.
💡 Key Hints for MCQs
  • The most common Anorectal Malformation in males is Rectourethral fistula, and in females is Rectovestibular fistula.
  • X-ray for imperforate anus MUST be delayed for 24 hours to allow swallowed air to reach the rectum.
  • Umbilical hernias should not be operated on immediately; they usually close by age 5-7 years.
  • Hirschsprung disease hallmark on enema is the Transition Zone.

L3: Pediatric Surgery (Gastrointestinal & Biliary)

Meconium Ileus
  • Definition: Extremely viscid, protein-rich, inspissated meconium causing intraluminal obstruction specifically in the distal ileum.
  • Normal Meconium Composition: Composed of Water (>75%), Intestinal epithelial cells, Amniotic fluid, Mucus, Lanugo, and Bile.
  • Causes of Meconium Ileus:
    • Cystic fibrosis
    • Pancreatic aplasia
    • Colonic aganglionosis
  • Clinical Presentation: Failure to pass meconium and progressive Abdominal distension.
Meckel Diverticulum
  • Pathology: A remnant of the embryologic vitelline (omphalomesenteric) duct that connects fetal gut with yolk sac. Normally involutes between 5th and 7th weeks of gestation.
  • The 'Rule of 2s':
    • Occurs in 2% of the population.
    • Male to female ratio is 2:1.
    • Usually discovered by 2 years of age.
    • Located 2 feet (60 cm) from the ileocecal valve.
    • Commonly 2 cm in diameter and 2 inches (5 cm) long.
    • Can contain two types of heterotopic mucosa: Gastric (most common), followed by pancreatic.
  • Clinical Presentation:
    • Episodic painless rectal bleeding (1st most common presentation).
    • Intestinal obstruction (2nd).
    • Diverticular inflammation (3rd).
  • Diagnosis & Treatment: Preferred test is Technetium-99 radionuclide study ('Meckel scan'). Treatment for symptomatic cases is resection (open or laparoscopic). Management of asymptomatic incidental cases remains controversial.
Biliary Atresia
  • Definition: Obstructive condition of the bile ducts causing neonatal jaundice.
  • Cardinal Signs (Classic Triad):
    • Direct Jaundice (more than 20% Total Serum Bilirubin).
    • Clay-colored stools (associated with dark, tea-like urine).
    • Hepatomegaly.
  • Diagnosis & Treatment: Diagnosed via Ultrasound. Treated surgically with the Modified Kasai procedure (Roux-en Y portoenterostomy).
  • Prognosis depends on: Age at diagnosis, Associated anomalies, and Surgery timing.
Choledochal Cyst
  • Definition: Congenital dilatation of the biliary tract (found along any portion).
  • Presentation: In infants, it presents commonly as an abdominal mass and/or jaundice. In older children, abdominal pain is the most common finding.
Tracheoesophageal Fistula (TEF)
  • Associated heavily with VACTARL malformations.
  • Clinical Scenario & Exam: Full-term cyanotic neonate with severe respiratory distress. Distinctly scaphoid (sunken) abdomen. Absent breath sounds on left, heart displaced to the right. Gurgling bowel sounds in the left chest cavity.
  • Diagnostic X-Ray Findings: Air-filled loops of bowel occupying the left hemithorax, with severe mediastinal shift.
  • Treatment: Immediate resuscitation and stabilization followed by Surgery.
💡 Key Hints for MCQs
  • Meconium Ileus is highly predictive of Cystic Fibrosis.
  • Rule of 2s is the most important concept for Meckel Diverticulum (2%, 2 feet, 2 years, 2 types of mucosa).
  • Painless rectal bleeding in a child = suspect Meckel Diverticulum (Gastric mucosa bleeds).
  • Biliary atresia presents with Direct (Conjugated) Jaundice and pale/clay stools.
  • Choledochal cyst in infants = Mass + Jaundice; in older children = Pain.

L4: ATLS & Foreign Body Ingestions

Advanced Trauma Life Support (ATLS) - Primary Survey
  • Ensure Safety: Safety of self, safety of patient. Movement only when absolutely necessary to protect unstable cervical spine.
  • Airway: Clear and maintain, protect cervical spine.
  • Breathing: Ventilate, oxygenate, fix chest wall defects. All pediatric major trauma needs high-concentration oxygen.
  • Circulation:
    • Check pulse. If absent within 10 seconds, start chest compressions (patient must be supine on firm flat surface).
    • 1st goal: Control bleeding. 2nd goal: Restore volume (Volume resuscitation required if hypovolemic shock signs are present).
    • Signs of Shock: Confusion, dizziness, pale/clammy skin, dark tarry stools. Systolic hypotension is a LATE sign, not developing until 30–35% of circulating blood volume is lost.
  • Disability: Glasgow Coma Scale (GCS) and pupils, call the neurosurgeon.
  • Exposure: Avoid hypothermia, maintain temperature, spine stabilization.
  • Tubes: Foley catheter unless contraindicated (Meatal blood, scrotal hematoma, high-riding prostate). Gastric tube unless contraindicated (Cerebrospinal Fluid (CSF) oto-rhinorrhea, basilar skull fracture, midface instability).
ATLS - Secondary Survey
  • History taking (SAMPLE):
    • S: Signs and Symptoms.
    • A: Allergies.
    • M: Medications.
    • P: Pertinent past history.
    • L: Last oral intake.
    • E: Events leading to injury.
  • Imaging & Studies: Plain radiographs (Chest, pelvis, lateral cervical spine). Special studies (Focused Assessment with Sonography in Trauma (FAST), Computed Tomography (CT)).
Foreign Body (FB) Ingestions
  • Vast majority in children are accidental.
  • 80%–90% of FBs in the gastrointestinal tract are passed spontaneously without complications.
  • Common Sites of Impaction:
    • Esophagus (narrowest portion of alimentary tract).
    • Pylorus.
    • C-shape of duodenum.
    • Ileocecal valve.
  • Risks: Large bodies (>6 cm length) are unlikely to pass duodenum/ileocecal valve. Sharp/pointed objects (safety pins, nails) cause perforation in 15%–35% of patients.
  • Diagnosis: Radiopaque objects seen on AP/lateral x-ray. Radiolucent objects require gastrografin Upper Gastrointestinal Tract (UGIT) contrast study or esophagoscopy.
  • Indications for FB Removal:
    • Any esophageal foreign body.
    • Gastrointestinal FBs with complications (obstruction, perforation, fistulation).
    • Magnets (multiple magnets may attach causing necrosis).
    • Bezoars.
💡 Key Hints for MCQs
  • Systolic Hypotension is a LATE sign of shock, meaning the patient has already lost >30% of blood.
  • Always secure the Cervical Spine while managing the Airway.
  • Do NOT insert a urinary catheter if there is blood at the meatus or a high-riding prostate (suspect urethral injury).
  • Do NOT insert a nasogastric tube if there are signs of a basilar skull fracture (CSF rhinorrhea).
  • Esophageal FBs and Magnets must ALWAYS be removed endoscopically.

L5: Pediatric Tumors

Common Abdominal Tumors in Children
  • Neuroblastoma: The most common abdominal tumor in infants and children.
  • Renal Tumors: Wilms Tumor (WT) (Also referred to as nephroblastoma or renal embryoma) is the most frequent tumor of the kidney in infants/children. Often noted incidentally during a bath.
  • Differential Diagnosis for Malignant Abdominal Mass: Neuroblastoma, Wilms Tumor, Hepatoblastoma, Rhabdomyosarcoma, Lymphoma.
💡 Key Hints for MCQs
  • Neuroblastoma is the most common solid extra-cranial tumor, and it is usually PAINFUL and crosses the midline.
  • Wilms Tumor is usually PAINLESS and does NOT cross the midline.
  • Hepatoblastoma is the most common primary liver tumor in the first 2 years of life.

L6: War Surgery & Trauma Management

Triage Principles
  • Definition: From French 'Trier' (to sort/choose). Categorization of patients for priorities of treatment. Place the right patient in the right place, in right time, by right persons.
  • Core Dictum: "Do the best for the most, not everything for everyone".
  • START Triage (Simple Triage and Rapid Treatment): Uses a 60-second assessment focusing on Ability to walk, Respiratory effort, Pulses/perfusion, and Neurological status.
  • Triage Categories (Color Coding):
    • Red (Immediate): Life-threatening but treatable. Requires rapid medical attention. (Critical but likely to survive if treated early).
    • Yellow (Delayed): Potentially serious injuries, but stable enough to wait a short while for treatment.
    • Green (Minor/Hold): Walking wounded. Minor injuries that can wait longer.
    • Black (Expectant/Deceased): Dead, no spontaneous respiration, or unsalvageable injuries unlikely to survive.
Weapons & Missile Injuries
  • Penetrating Injuries: Bullets (High velocity = bomb; Low velocity = handgun), Fragments (shells).
  • High Velocity Missile (> 250 m/sec) leads to:
    • Shattered bone.
    • Disrupted viscera.
    • Muscle devitalization and contusion.
    • Entrance and exit of bullet are NOT related to the degree of internal damage.
    • Tissue stretching (cavitation) causing fractured blood vessels.
Damage Control Surgery (DCS)
  • Trauma Triad of Death: Coagulopathy (Bleeding), Hypothermia, and Acidosis.
  • Stages of DCS:
    • Stage 0 (ER): Damage control resuscitation.
    • Stage I (OR): Rapid/primary surgery to control bleeding and contamination. Do no more than needed.
    • Stage II (ICU): Resuscitation. Physiological restoration (rewarming, correct acidosis/coagulopathy, optimize oxygen).
    • Stage III (OR): Definitive/complementary surgery. Second look and definitive repair attempted 24-48 hours post-injury.
  • Selective Criteria for DCS (Most Important Physiological):
    • Hypothermia: Temperature < 35°C.
    • Acidosis: pH < 7.2 or base deficit > 6.
    • Coagulopathy: International Normalized Ratio (INR) > 1.5 or uncontrolled bleeding.
War Wound Surgical Management
  • War wounds are dirty and contaminated from the moment of injury. The best antibiotic is a good surgery.
  • The "Do" List: Generous long skin/fascia incisions, expose deep fascia, identify neurovascular bundles, excise devitalized muscle (check color, contractility, consistency), trim/suture arteries, leave wound OPEN at end of surgery (delay primary closure), use fluffed gauze dressing, administer Triple antibiotics, immobilize limb (Plaster of Paris - POP).
  • The "Don't" List: Do NOT attempt to repair ruptured tendons or nerves, do NOT practice keyhole surgery, do NOT remove bone fragments fixed to periosteum, do NOT insert synthetic prostheses, do NOT close the skin.
  • Abdomen: Midline incision (adults), Transverse incision (pediatrics). Large bowel injury management depends on site, but colostomy is mandatory.
  • Chest: Chest tube is mandatory in any penetrating chest trauma to prevent sucking wound, tension pneumothorax, and mediastinal shift.
  • Indications for Thoracotomy: Ongoing loss from chest tube, massive initial loss, cardiac tamponade, mediastinal injury, persistent air leak.
  • Renal: Better treated conservatively. Bladder/Urethra: Suprapubic drainage to divert urine. Liver: Peri-hepatic compression or finger fracture technique. Spleen: Splenectomy or splenorrhaphy.
💡 Key Hints for MCQs
  • The golden rule in war wounds is to LEAVE THE WOUND OPEN (Delay Primary Closure). Never close the skin.
  • In high-velocity wounds, internal damage is massive due to Cavitation, regardless of the entry/exit size.
  • Trauma Triad of Death = Hypothermia + Acidosis + Coagulopathy.
  • A chest tube is MANDATORY in penetrating chest trauma to prevent tension pneumothorax.

L7: Anaesthesia 1 (Assessment & Preparation)

Pre-operative Assessment & History
  • Patients assessed delicately to identify undiagnosed issues, poorly controlled conditions, or abnormal baseline investigations.
  • Hypertension (HT) Classification & Action:
    • Mild (SBP 140–159, DBP 90–99 mmHg): No evidence that delaying surgery affects outcome.
    • Moderate (SBP 160–179, DBP 100–109 mmHg): Consider review of treatment, requires close monitoring for swings.
    • Severe (SBP > 180, DBP > 109 mmHg): Elective surgery should be postponed due to significant risk of myocardial ischemia, arrhythmias, and intracerebral hemorrhage.
  • Respiratory System: Obese patients or those undergoing thoracic/upper abdominal surgery are prone to post-op chest infections. Acute upper respiratory infection = postpone elective surgery.
  • Habits & Status:
    • Smoking: Decreases oxygen carriage (Carbon Monoxide affinity). Quitting 24 hours decreases CarboxyHb; quitting 2 weeks reduces airway irritability; quitting 8 weeks improves airway function.
    • Alcoholism: Induces liver enzymes, creates tolerance for anesthetic drugs.
    • Pregnancy: Last Menstrual Period (LMP) date must be obtained. Anaesthesia increases spontaneous abortion risk early on, and aspiration risk late in pregnancy.
Guedel’s Classification of Anaesthesia Stages
  • Stage I (Analgesia/Disorientation): From induction to loss of consciousness.
  • Stage II (Excitement/Delirium): Loss of consciousness to onset of assisted breathing. Eyelash reflex disappears, but coughing/vomiting/struggling may occur.
  • Stage III (Surgical Anesthesia): From assisted respiration to respiratory muscle paralysis.
  • Stage IV (Brain Death): Cessation of breathing till death (Anesthetic overdose causing medullary paralysis). Pupils widely dilated.
Premedication & Fasting Guidelines
  • Classification of Surgery: Elective, Scheduled (within 3 weeks), Urgent (within 24 h), Emergency (within 1 h).
  • Premedication (The 6As):
    • Anxiolysis: Benzodiazepines (Diazepam).
    • Amnesia: Benzodiazepines/Opioids.
    • Anti-emetic: Metoclopramide, Ondansetron, Dexamethasone.
    • Antacids: Modify pH/gastric volume (H2 blockers like Ranitidine, Proton Pump Inhibitors like Omeprazole).
    • Anti-autonomic: Anticholinergic to reduce salivation (Glycopyrrolate) or vagolytic to reduce bradycardia in children (Atropine). Antisympathetic (Beta-blockers).
    • Analgesia.
  • Pre-operative Starvation Guidelines: Prolonged starvation increases risk of Post-Operative Nausea and Vomiting (PONV).
    • Water/clear fluids/chewing gum: 2 hours.
    • Breast milk: 4 hours.
    • Solid food: 6 hours.
    • Heavy (fatty) meals: 8 hours.
💡 Key Hints for MCQs
  • Severe Hypertension (SBP > 180 or DBP > 109) is an absolute reason to POSTPONE elective surgery.
  • Fasting times rule: 2 hrs clear fluids, 4 hrs breast milk, 6 hrs solids, 8 hrs heavy meals.
  • Quitting smoking takes 8 weeks to improve airway function, but only 24 hours to reduce carbon monoxide levels.

L8: Anaesthesia 2 (Airway & Induction)

Airway Management & Intubation
  • Jaw Thrust: Holding facemask with C & E technique (index/thumb form C, three fingers form E to lift mandible). Lift mandible INTO the mask.
  • Facemask: BOC anatomical mask. Air-filled cuff minimizes gas leak. Smallest size providing a good seal should be used. Transparent body allows identifying vomit/bleeding.
  • Oropharyngeal (Guedel’s) Airway: Curved plastic, prevents tongue from falling back. Size estimated by comparing to vertical distance between incisors teeth and angle of mandible. Inserted upside down to hard palate, rotated 180 degrees.
  • Intubation Steps:
    • Pre-oxygenation: 100% O2 via close mask for 2-3 mins (provides reservoir, reduces hypoxia risk).
    • Positioning: Neck flexed, head extended at atlanto-occipital joint (sniffing 'the morning air' position).
    • Laryngoscopy: Blade introduced along right side of tongue, displacing it left.
  • Cricoid Pressure (Sellick’s Maneuver): Physical barrier to regurgitation during induction. Pressure on complete cricoid cartilage compresses the esophagus against the sixth cervical vertebral body.
Intravenous & Inhalational Anaesthesia
  • Ketamine (IV Induction): Causes tachycardia and Hypertension (useful in shocked/hypovolemic patients, precaution in cardiac disease). Bronchodilator, preserves laryngeal reflexes. Increases intracerebral and intraocular pressures. Profound analgesia, causes vivid hallucinations.
  • Propofol (IV Induction): Causes hypotension and apnea. Reduces cerebral blood flow and Intracranial Pressure (ICP). Pain on injection. Non-accumulative, uniquely used to maintain anaesthesia via continuous infusion (Total Intravenous Anaesthesia - TIVA).
  • Ideal Inhalational Anaesthetic: Ample potency, low solubility in blood (fast onset/offset), resistant to degradation, non-toxic, non-epileptogenic, non-irritant, non-inflammable.
💡 Key Hints for MCQs
  • Cricoid pressure compresses the esophagus against the 6th cervical vertebra (C6).
  • Ketamine is the induction drug of choice for shocked/hypovolemic patients because it raises Blood Pressure and Heart Rate.
  • Propofol lowers ICP and Blood Pressure, making it ideal for neurosurgery but risky in hypovolemia.
  • Oropharyngeal airway size is measured from the incisors to the angle of the mandible.

L9: Anaesthesia 3 (Recovery & Regional)

Post-Anaesthesia Care & Complications
  • Discharge Criteria: Fully conscious (able to maintain own airway), adequate breathing, stable cardiovascular system, adequate pain relief, warm.
  • Hypoxia: Most important respiratory complication. Hypoventilation is the commonest cause (insufficient oxygen influx).
  • Hypotension & Hypovolemia: Hypovolaemia is the commonest cause of hypotension post-op. Diagnosis: Poor perfusion, Tachycardia (>100 bpm), Inadequate urine output (< 0.5ml/kg/h). Note: Commonest cause of oliguria is hypovolemia; Anuria is usually due to a blocked catheter.
  • Post-Operative Nausea and Vomiting (PONV): Occurs in up to 80%. Risk factors: Young females, abdominal/middle ear/posterior cranial fossa surgery, opioid use, hypotension from spinal anaesthesia, motion sickness history.
Post-Operative Analgesia
  • Consequences of ineffective pain management: Reduced cough (pneumonia), thromboembolic disease, delayed healing, chronic pain syndrome.
  • Drugs Used:
    • Weak Opioids: Codeine, Tramadol (mild to moderate pain).
    • Strong Opioids: Pethidine (Meperidine), Morphine (moderate to severe pain, requires monitoring).
    • Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): Paracetamol (safest, minimal anti-inflammatory action), Ibuprofen, Diclofenac.
Local & Regional Anaesthesia (Central Neural Blockade)
  • Benefits: Avoids systemic effects, preserves spontaneous ventilation in respiratory disease patients, preserves airway reflexes (reduces aspiration risk), reduces blood loss.
  • Spinal Anaesthesia: Intrathecal injection into Cerebrospinal Fluid (CSF). Needle inserted below L2 and above S1 vertebrae. Fine pencil-point needle used to reduce Post-Dural Puncture Headache (PDPH).
  • Monitoring: Early signs of inadequate cardiac output under block are nausea/faintness. Numbness in fingers indicates extensive spread.
  • Contraindications for Spinal Anaesthesia: Hypovolaemia, low fixed cardiac output (mitral stenosis), local skin sepsis, Coagulopathy, Raised Intracranial Pressure (ICP), uncooperative patient, allergy.
💡 Key Hints for MCQs
  • If a postoperative patient has Anuria (zero urine output), suspect a blocked catheter first. If Oliguria, suspect hypovolemia.
  • Spinal anesthesia is injected strictly between L2 and S1 to avoid spinal cord injury.
  • Hypovolemia and Coagulopathy are absolute contraindications for spinal anesthesia.
  • Hypoventilation is the most common cause of postoperative hypoxia.

⚖️ Ultimate Comparisons for the Exam (10 Tables)

1. Omphalocele vs. Gastroschisis
Feature Omphalocele Gastroschisis
Covering Membrane Present (Amnion outside, peritoneum inside) Absent (Bowel exposed to amniotic fluid)
Location of Defect Through the umbilical ring Usually to the right of the umbilicus
Associated Anomalies Very High (Trisomies, Cardiac) Low (Usually isolated, intestinal atresia)
2. High vs. Low Intestinal Obstruction
Feature High Obstruction Low Obstruction
Vomiting Early and frequent Later onset
Abdominal Distension Late or Minimal Early and Massive
Examples Pyloric Stenosis, Duodenal Atresia Hirschsprung, Ileal Atresia
3. Ketamine vs. Propofol (Induction Agents)
Feature Ketamine Propofol
Hemodynamics Tachycardia & Hypertension Hypotension
Intracranial Pressure (ICP) Increases ICP Decreases ICP
Best Indication Shocked / Hypovolemic patients Total Intravenous Anaesthesia (TIVA), Neurosurgery, Stable patients
4. Wilms Tumor vs. Neuroblastoma
Feature Wilms Tumor (Nephroblastoma) Neuroblastoma
Presentation Usually a Painless mass Often a Painful mass
Midline Crossing Rarely crosses the midline Frequently crosses the midline
Origin Kidney (Intra-renal) Adrenal medulla or sympathetic chain
5. High Velocity vs. Low Velocity Missiles (War Surgery)
Feature High Velocity (>250 m/sec) Low Velocity
Mechanism of Injury Direct cut + Cavitation (Stretching) Direct laceration only
Internal Damage Massive (Shattered bone, devitalized muscle) Limited to the tract of the bullet
Entry vs. Exit Wound Not related to internal damage severity Correlates relatively with internal damage
6. Male vs. Female Anorectal Malformations
Feature Males Females
Most Common Type (80%) Rectourethral fistula Rectovestibular fistula
Unique Fistulas Rectobladder neck, Rectoprostatic Rectovaginal, Cloaca
7. Post-operative Oliguria vs. Anuria
Feature Oliguria Anuria
Definition Urine output < 0.5 ml/kg/h Complete absence of urine output
Most Common Cause Hypovolemia (Decreased perfusion) Blocked Foley catheter
Initial Action Intravenous fluid resuscitation Check and flush/change catheter
8. Pre-operative Hypertension (Mild vs. Severe)
Feature Mild Hypertension Severe Hypertension
Blood Pressure Range Systolic 140–159, Diastolic 90–99 mmHg Systolic > 180, Diastolic > 109 mmHg
Surgical Decision (Elective) No evidence delaying surgery affects outcome Should be postponed
Risks if uncontrolled Minor swings Myocardial ischemia, arrhythmias, intracerebral hemorrhage
9. Triage Categories (Red vs. Black)
Feature Red (Immediate) Black (Expectant / Deceased)
Clinical Status Critical, but likely to survive if treated early Dead, no spontaneous respiration, unsalvageable injuries
Treatment Priority Requires rapid/immediate medical attention No medical care is likely to help
10. Foreign Body Ingestion Management
Feature Spontaneous Passage (Observe) Mandatory Removal
Location Past the pylorus / Intestinal Esophagus
Type & Size Small, blunt objects Magnets, Bezoars, Sharp objects, >6cm
Percentage of Cases 80%–90% of Gastrointestinal foreign bodies Remaining 10-20%