9.3 Hepatic Failure, Malnutrition & GI Surgery
Key Takeaways
- Pediatric acute liver failure presents with coagulopathy, encephalopathy, hypoglycemia, and hyperammonemia; rising INR is a prognostic marker, and transplant evaluation begins early while supporting airway, glucose, and cerebral perfusion.
- Hepatic encephalopathy management emphasizes treating precipitants, lactulose (and often rifaximin or antibiotics when indicated), avoiding unnecessary sedation, and monitoring for cerebral edema in advanced grades.
- Liver transplant nursing centers on vascular and biliary anastomotic integrity, immunosuppression, infection surveillance, and recognition of rejection, hepatic artery thrombosis, and primary graft nonfunction.
- Critical illness malnutrition and malabsorption (short bowel, cholestasis, pancreatic insufficiency) require early nutrition risk assessment, preference for enteral feeding when the gut works, and careful prevention of refeeding syndrome.
- Post–GI surgery PICU care for children focuses on fluid third-spacing, anastomotic leak surveillance, ileus versus obstruction, stoma viability, analgesia that preserves respiratory mechanics, and staged advancement of feeds.
Pediatric Hepatic Failure and Hepatic Coma
Acute liver failure (ALF) in children is acute hepatocellular injury with synthetic failure—classically coagulopathy (elevated INR) and hepatic encephalopathy—without known chronic liver disease (definitions vary slightly by age and society guidelines, but the exam focus is the clinical pattern). Causes differ by age: neonates and infants may have metabolic disease, gestational alloimmune liver disease, hemophagocytic syndromes, or viral infection; older children add acetaminophen and other drug toxicity, autoimmune hepatitis, indeterminate ALF, and Wilson disease in school-age and adolescent patients.
Synthetic failure produces hypoglycemia (impaired glycogenolysis/gluconeogenesis), hypoalbuminemia, and coagulopathy. Detoxification failure produces hyperammonemia and encephalopathy. Circulatory changes include hyperdynamic physiology and risk of cerebral edema as encephalopathy advances—especially dangerous in pediatric ALF. Hepatorenal physiology, infection susceptibility, and multiorgan failure accompany progressive disease.
Encephalopathy Grading and Supportive Care
Hepatic encephalopathy is graded from subtle behavioral change and sleep reversal to deep hepatic coma. West Haven–style grades remain useful: mild confusion and asterixis early; somnolence and disorientation mid-grades; coma at the extreme. In infants, grading relies more on interaction, tone, and arousal than classic asterixis language.
PICU priorities are airway protection for declining mental status, continuous glucose monitoring with dextrose infusion to prevent neuroglycopenia, cautious fluid management balancing perfusion against cerebral edema risk, correction of electrolytes (especially sodium, phosphate, magnesium), and infection surveillance. Lactulose is titrated to produce soft stools and reduce intestinal ammonia absorption; additional ammonia-lowering or gut-decontaminating strategies may be used per protocol. Avoid benzodiazepines and other sedatives that deepen encephalopathy unless required for airway management or procedural safety. A rising INR tracks prognosis; prophylactic plasma transfusion to “normalize” INR is not routine and may confound transplant listing labs—product use is reserved for active bleeding or invasive procedures.
Early transplant center referral is mandatory for progressive coagulopathy, advancing encephalopathy, or etiologies unlikely to recover. Bridging therapies (continuous renal replacement for hyperammonemia/fluid overload in selected patients, plasma exchange in some centers) support the child to recovery or graft availability.
| Problem | Bedside signal | Priority action |
|---|---|---|
| Hypoglycemia | Jitteriness, seizures, low glucose | Continuous dextrose, frequent checks |
| Encephalopathy | Irritability → coma | Airway, lactulose, avoid sedatives |
| Coagulopathy | Rising INR, bruising | Prognostic tracking; products for bleed/procedure |
| Cerebral edema | Hypertension, bradycardia, posturing | Neuroprotective care, urgent escalation |
| Infection | Fever, rising lactate | Cultures, early antibiotics |
Liver Transplant Nursing in the PICU
Pediatric liver transplantation (whole organ or technical-variant grafts, including living-donor left lateral segment for small recipients) is definitive therapy for irreversible ALF and end-stage chronic disease (biliary atresia after failed Kasai being the leading pediatric indication historically).
Immediate postoperative priorities are graft perfusion and vascular anastomotic integrity. Hepatic artery thrombosis (HAT) is a devastating early complication in children—sudden rise in transaminases, coagulopathy, fever, or bile leak/abscess risk should trigger Doppler ultrasound and urgent surgical or interventional rescue. Portal vein thrombosis and hepatic vein outflow obstruction present with graft swelling, ascites, and laboratory deterioration. Primary graft nonfunction produces persistent acidosis, escalating lactate, and synthetic failure—retransplant evaluation proceeds rapidly.
Biliary complications (stricture, leak) may appear early or late. Immunosuppression (commonly calcineurin inhibitor–based regimens with adjuncts) requires meticulous drug-level timing, infection prophylaxis, and monitoring for nephrotoxicity and neurotoxicity. Acute cellular rejection presents with rising cholestatic and hepatocellular enzymes, fever, and graft tenderness; biopsy confirms, and steroids or intensified immunosuppression treat. PICU nursing also manages drains, glucose control, pulmonary toilet after upper abdominal incision, and family education around lifelong graft stewardship.
Malnutrition and Malabsorption
Critically ill children enter a catabolic state; preexisting failure to thrive amplifies risk. Screen nutrition status early (weight-for-length/BMI z-scores, mid-upper arm circumference when usable, prealbumin trends with clinical context). Enteral nutrition is preferred when the gut is usable—even trophic feeds protect mucosal integrity. Parenteral nutrition supports children with obstruction, severe NEC aftermath, high-output fistulae, or intestinal failure, with vigilant line infection and cholestasis surveillance.
Malabsorption follows short bowel syndrome after massive resection (midgut volvulus, NEC), cholestatic liver disease with fat-soluble vitamin deficiency (A, D, E, K), pancreatic insufficiency, and mucosal disease. Nursing implications include steatorrhea recognition, fat-soluble vitamin replacement, monitoring INR when vitamin K absorption fails, and managing high-output stomas with fluid and zinc replacement. When feeds restart after prolonged starvation, prevent refeeding syndrome: start calories cautiously, replete phosphate, potassium, and magnesium, and monitor for arrhythmia and respiratory muscle weakness as insulin drives minerals intracellularly.
Post–GI Surgery PICU Care in Children
Pediatric GI operations relevant to the CCRN Pediatric exam include laparotomy for NEC or volvulus with stoma creation, Ladd procedure for malrotation, intussusception reduction/resection, pull-through for Hirschsprung disease, Kasai portoenterostomy for biliary atresia, fundoplication in selected reflux/aspiration candidates, and repair of abdominal-wall defects—not adult Whipple-focused pathways. Postoperative physiology is dominated by third-space fluid loss into bowel wall and peritoneum: expect tachycardia and oliguria that respond to thoughtful fluid replacement, then mobilize fluid as inflammation resolves, watching for pulmonary edema during diuresis.
Monitor for anastomotic leak (fever, tachycardia, peritoneal signs, bilious drainage, rising lactate), ileus versus mechanical obstruction, wound infection, and stoma viability (pink, moist, patent versus dusky necrotic). Analgesia and regional techniques should preserve respiratory excursion after upper abdominal surgery. Gastric decompression continues until drainage decreases and bowel function returns; advance feeds per surgical guidance—clear liquids to breast milk/formula or elemental diets in short-bowel patients. Antibiotics continue when peritonitis or perforation was present. Escalating abdominal girth, peak pressures, and oliguria after tight closure raise concern for abdominal compartment syndrome.
Integrated Clinical Scenario
A toddler after midgut volvulus resection arrives with a jejunostomy, capillary leak, and hypoglycemia history from preoperative ischemia-reperfusion. Priorities include perfusion-directed fluids, glucose control, stoma assessment, early nutrition planning for short-bowel risk, and leak surveillance. Separately, an adolescent in ALF with grade 3 encephalopathy needs airway readiness, lactulose, glucose infusion, neuroprotective positioning and monitoring, and simultaneous transplant evaluation. Mastering these pediatric-specific arcs—failure, graft, nutrition, and postoperative gut—secures the gastrointestinal domain on the CCRN Pediatric exam.
A 4-year-old with acute liver failure has an INR of 3.2, intermittent hypoglycemia, and progressive somnolence without active bleeding. Which statement best guides therapy?
Twelve hours after pediatric liver transplant, transaminases rise sharply, lactate climbs, and hepatic artery Doppler signal is absent. What complication is most likely?
After extensive small-bowel resection for neonatal midgut volvulus, feeds are restarted following prolonged parenteral nutrition. Which monitoring priority best prevents refeeding complications?