GI bleed related to esophageal varices, secondary to liver failure, include hypovolemic shock, massive transfusion protocol - Nursing Case Study

Pathophysiology

• Primary mechanism: Portal hypertension arises from liver failure, causing increased pressure in the portal venous system, leading to the development of esophageal varices due to collateral circulation.

• Secondary mechanism: Varices are prone to rupture due to their thin walls and high pressure, resulting in a significant upper gastrointestinal bleed. This acute blood loss leads to decreased intravascular volume.

• Key complication: Hypovolemic shock occurs as a result of rapid blood loss, reducing cardiac output and impairing tissue perfusion, necessitating urgent intervention. A massive transfusion protocol is initiated to restore hemodynamic stability, involving the rapid infusion of blood products to replace lost volume, maintain coagulation, and optimize oxygen delivery.

Patient Profile

Demographics:

56-year-old male, construction worker

History:

• Key past medical history: Chronic alcohol use disorder, cirrhosis, portal hypertension, esophageal varices

• Current medications: Propranolol, Lactulose, Spironolactone, Furosemide

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Severe upper gastrointestinal bleeding

• Key symptoms: Hematemesis, melena, dizziness, confusion, abdominal distension

• Vital signs: Blood pressure 78/50 mmHg, heart rate 128 bpm, respiratory rate 24 breaths per minute, temperature 36.5°C, oxygen saturation 88% on room air

Section 1

As the emergency department team initiates the massive transfusion protocol, the initial assessment reveals critical findings. The patient is pale, diaphoretic, and exhibits signs of severe distress. Auscultation of the lungs reveals diminished breath sounds bilaterally with some crackles at the bases, suggesting potential fluid overload or aspiration. The abdomen is markedly distended with significant ascites, and there is diffuse tenderness upon palpation. Neurologically, the patient is lethargic and increasingly confused, scoring a 10 on the Glasgow Coma Scale, indicative of altered mental status likely due to hepatic encephalopathy exacerbated by acute hypovolemic shock.

Laboratory results return, showing a hemoglobin of 5.8 g/dL, indicating severe anemia. Coagulation studies reveal an elevated INR of 2.5 and a prolonged aPTT, suggesting coagulopathy likely secondary to liver dysfunction. The patient’s liver function tests are severely deranged, with a total bilirubin of 6.8 mg/dL, AST of 350 U/L, and ALT of 290 U/L. Electrolyte imbalances are present, with hyponatremia (Na+ 128 mmol/L) and hypokalemia (K+ 2.9 mmol/L), necessitating careful correction. Arterial blood gas analysis shows a pH of 7.30, with a pCO2 of 32 mmHg and HCO3- of 16 mmol/L, indicating metabolic acidosis with partial respiratory compensation.

Despite the transfusion of packed red blood cells, fresh frozen plasma, and platelets, the patient’s blood pressure remains critically low at 82/54 mmHg, and heart rate remains tachycardic at 135 bpm. A decision is made to initiate vasopressor support with norepinephrine to improve perfusion. As the team continues to stabilize the patient, they must consider the risk of further complications such as rebleeding, worsening hepatic encephalopathy, and potential acute kidney injury due to hypoperfusion. The multidisciplinary team, including gastroenterology and critical care specialists, is consulted to devise a comprehensive management plan, prioritizing endoscopic intervention for variceal control and ongoing support for multi-system complications.

Section 2

As the emergency department team continues to manage the patient's complex condition, a change in patient status prompts immediate reevaluation. Despite the initial transfusion efforts and vasopressor support, the patient's blood pressure remains labile, fluctuating between 85/50 mmHg and 78/48 mmHg, with persistent tachycardia at 140 bpm. The patient's respiratory status deteriorates, with increasing respiratory rate now at 32 breaths per minute and oxygen saturation dropping to 88% on a non-rebreather mask. Repeat auscultation of the lungs reveals worsening crackles throughout both lung fields, suggesting acute pulmonary edema, possibly due to aggressive fluid resuscitation amidst ongoing transfusions and the baseline fluid overload secondary to liver failure.

The patient's neurological status further declines, with the Glasgow Coma Scale score dropping to 8, indicating significant encephalopathy. This deterioration raises concerns about progressive cerebral edema or worsening ammonia levels due to hepatic dysfunction. To address these issues, the team considers intubation to protect the airway and manage the patient's respiratory compromise. Additionally, a stat head CT is ordered to rule out intracranial complications, while ammonia levels are re-evaluated to assess the extent of hepatic encephalopathy.

In light of the patient's critical status, the multidisciplinary team revisits the management plan, emphasizing the need for urgent endoscopic intervention to control the variceal bleed. The team also explores the potential use of additional pharmacologic measures, such as octreotide, to reduce portal hypertension and further bleeding risk. With the patient teetering on the brink of multiorgan failure, the team must balance aggressive interventions while vigilantly monitoring for new complications such as acute kidney injury, given the patient's tenuous hemodynamics and electrolyte imbalances. As the situation unfolds, the team prepares for the next critical steps in the patient's care journey, with a focus on stabilizing vital functions and preventing further deterioration.

Section 3

As the emergency team proceeds with the critical care plan, the patient is intubated to secure the airway, and mechanical ventilation is initiated with careful attention to settings that will minimize further fluid overload while optimizing oxygenation. The head CT scans return, showing no acute intracranial hemorrhage or mass effect, thus alleviating immediate concerns of cerebral edema, but the elevated ammonia level at 160 µmol/L confirms significant hepatic encephalopathy. The nephrology team is consulted due to rising creatinine levels, now at 2.3 mg/dL, indicating acute kidney injury potentially stemming from hypoperfusion and massive transfusion protocol side effects.

Despite these efforts, the patient's hemodynamic status remains unstable, with mean arterial pressures struggling to exceed 60 mmHg despite escalating doses of norepinephrine. A bedside ultrasound reveals a hyperdynamic heart and small, underfilled inferior vena cava suggestive of ongoing hypovolemia, emphasizing the need to fine-tune fluid management. Meanwhile, the gastroenterology team prepares for an emergent endoscopy, aiming to identify and control the source of variceal bleeding. Octreotide infusion is started to reduce portal pressure and mitigate further hemorrhage risk.

The clinical team faces a critical decision on balancing volume resuscitation with the risk of exacerbating pulmonary edema. Continuous renal replacement therapy (CRRT) is considered to manage fluid overload and support renal function while evaluating the potential benefits of additional vasopressor support. The patient's complex and deteriorating condition demands an orchestrated response across specialties, focusing on stabilization and targeted intervention to prevent progression to multiorgan failure. As interventions proceed, each team member contributes to the comprehensive reevaluation of the patient's evolving needs, ensuring that every action is informed by the latest clinical data and guided by advanced critical thinking.

Section 4

As the clinical team continues their rigorous management plan, the patient's condition undergoes a subtle yet concerning change. Despite the initiation of octreotide and the ongoing norepinephrine infusion, the patient's hemodynamics remain precarious. The mean arterial pressure hovers just above critical levels at 62 mmHg, and the heart rate is persistently tachycardic at 120 beats per minute. Arterial blood gas analysis reveals a worsening metabolic acidosis with a pH of 7.28 and a bicarbonate level of 18 mEq/L, indicating a potential deterioration in tissue perfusion and escalating lactic acidosis. The lactate level has climbed to 5.8 mmol/L, further corroborating inadequate tissue oxygenation.

Simultaneously, the emergent endoscopy reveals multiple large esophageal varices with active oozing, necessitating immediate band ligation and sclerotherapy. The gastroenterology team successfully controls the variceal bleeding, but the procedure exacerbates the patient's already tenuous condition. Post-procedure, the patient exhibits signs of increasing respiratory distress, with escalating oxygen requirements and a rising central venous pressure, now at 16 mmHg, suggesting the onset of acute pulmonary congestion. The chest X-ray confirms bilateral pulmonary infiltrates consistent with fluid overload, compelling the team to urgently initiate continuous renal replacement therapy (CRRT) to offload the excess fluid while preserving renal function.

This cascade of events demands a recalibration of the treatment strategy. The nephrology team adjusts the CRRT settings to enhance fluid removal while maintaining hemodynamic stability. Concurrently, the critical care team deliberates the introduction of vasopressin to complement norepinephrine, aiming to achieve better vasopressor efficacy and improve perfusion pressure without exacerbating cardiac stress. As the patient's status evolves, the multidisciplinary team must continuously integrate new clinical findings with dynamic treatment adjustments, leveraging advanced critical reasoning to counteract the looming threat of multiorgan dysfunction. The path forward remains fraught with complexity, necessitating vigilant monitoring and collaborative decision-making to navigate the patient's precarious course.

Section 5

As the clinical team grapples with the precarious situation, a new complication emerges that demands immediate attention. The patient's oxygen saturation begins to decline rapidly, dropping to 85% despite high-flow oxygen therapy. Auscultation of the lungs reveals diminished breath sounds bilaterally, and the patient exhibits increased work of breathing with accessory muscle use. The arterial blood gas analysis indicates a concerning respiratory acidosis, with a pH of 7.24, PaCO2 elevated to 58 mmHg, and an oxygen partial pressure (PaO2) of only 60 mmHg. These findings suggest impending respiratory failure, likely exacerbated by fluid overload and the potential development of acute respiratory distress syndrome (ARDS).

In response to the deteriorating respiratory status, the critical care team prepares for urgent endotracheal intubation and mechanical ventilation to stabilize the patient’s oxygenation and ventilation. The intensivist chooses a lung-protective ventilation strategy, setting a low tidal volume and adjusting positive end-expiratory pressure (PEEP) to optimize alveolar recruitment while minimizing barotrauma. The decision is made to continue CRRT aggressively to manage the patient's fluid status and mitigate further pulmonary compromise. Additionally, vasopressin is introduced alongside norepinephrine to optimize systemic vascular resistance and support hemodynamics without increasing the cardiac workload.

As these interventions are implemented, the team remains acutely aware of the patient's potential for further complications, including ventilator-associated pneumonia or worsening renal function due to the ongoing hemodynamic instability. Continuous monitoring of vital signs, including hourly urine output, central venous pressure, and frequent blood gas analyses, becomes paramount. The team must be prepared for rapid adjustments in therapy, utilizing advanced critical reasoning and collaborative efforts across specialties to preemptively address any signs of multiorgan dysfunction syndrome (MODS). The path forward is challenging, requiring a delicate balance of interventions to stabilize the patient while preventing further deterioration.