Burns - Nursing Case Study

Pathophysiology

• Primary mechanism: Burns cause direct damage to the skin and underlying tissues, leading to the disruption of cellular integrity and the release of inflammatory mediators. This initiates a cascade of local and systemic inflammatory responses, increasing capillary permeability and fluid loss.

• Secondary mechanism: The increased capillary permeability results in significant plasma leakage into the interstitial spaces, causing edema and hypovolemia. This fluid shift can lead to burn shock, characterized by decreased cardiac output and impaired tissue perfusion.

• Key complication: The systemic inflammatory response and hypovolemia can progress to multi-organ dysfunction if not promptly managed, emphasizing the importance of fluid resuscitation and close monitoring in nursing care to prevent further complications.

Patient Profile

Demographics:

42-year-old male, professional chef

History:

• Key past medical history: Type 2 Diabetes, Hypertension

• Current medications: Metformin, Lisinopril

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Severe burns on arms and chest

• Key symptoms: Blistering and peeling skin, intense pain, signs of infection (redness, swelling, pus), fever

• Vital signs: Temperature 102.4°F, Heart rate 110 bpm, Blood pressure 145/90 mmHg, Respiratory rate 24 breaths per minute

Section 1

As the clinical team continues to manage the patient's condition, new diagnostic results reveal concerning developments. Laboratory tests show elevated white blood cell count, indicating an ongoing infection, and a C-reactive protein (CRP) level significantly higher than normal, reflecting systemic inflammation. Blood cultures identify the presence of Staphylococcus aureus, confirming a bacterial infection at the burn sites. The patient's blood glucose levels, monitored closely due to his Type 2 Diabetes, are persistently high, despite regular administration of metformin. This hyperglycemic state complicates the infection control, as elevated blood glucose levels can impair immune function and wound healing.

The patient's renal function tests show a slight increase in blood urea nitrogen (BUN) and creatinine, suggesting early signs of acute kidney injury (AKI), likely due to the combined effects of dehydration from fluid loss and the systemic inflammatory response. The healthcare team must now prioritize aggressive fluid resuscitation to manage hypovolemia and prevent progression of AKI. This involves careful titration of intravenous fluids to restore adequate tissue perfusion while monitoring for signs of fluid overload, particularly given the patient's hypertensive background.

In response to these findings, the clinical team decides to initiate broad-spectrum intravenous antibiotics, adjusting as necessary based on the sensitivity profile of the identified bacteria. Additionally, they implement strict glucose control strategies, including insulin therapy, to enhance infection control and support wound healing. Continuous monitoring of vital signs and organ function becomes paramount to detect any further deterioration, and the multidisciplinary team collaborates to adjust the management plan as the patient's condition evolves. This stage of the patient's journey highlights the need for vigilant assessment and timely interventions to address complications and prevent further organ dysfunction.

Section 2

As the clinical team continues to monitor the patient's response to the interventions, a change in the patient's status prompts immediate attention. Despite the initiation of broad-spectrum antibiotics and insulin therapy, the patient develops a sudden and concerning onset of respiratory distress. Vital signs reveal an increased respiratory rate of 28 breaths per minute, oxygen saturation dropping to 89% on room air, and a heart rate elevated to 110 beats per minute. Auscultation reveals diminished breath sounds and crackles in the lower lung fields, suggesting potential fluid overload or pulmonary complications, likely secondary to aggressive fluid resuscitation efforts.

Laboratory results show a further increase in BUN and creatinine levels, with BUN at 28 mg/dL and creatinine at 1.8 mg/dL, indicating worsening renal function and potential progression of acute kidney injury. The patient's blood glucose levels, although improved with insulin therapy, remain unstable, fluctuating between 180 and 250 mg/dL. Additionally, arterial blood gas analysis reveals a pH of 7.31, PaCO2 of 48 mmHg, and HCO3- of 22 mEq/L, indicating a state of respiratory acidosis possibly due to impaired gas exchange or decreased ventilation.

In response to these developments, the team revisits the fluid management strategy, balancing the need for adequate perfusion against the risk of pulmonary edema. The decision is made to cautiously adjust fluid administration and introduce diuretics to manage potential fluid overload. Concurrently, respiratory support is initiated with supplemental oxygen therapy to improve oxygenation and alleviate respiratory distress. The multidisciplinary team continues to closely monitor the patient, emphasizing the need for precise adjustments in treatment to prevent further deterioration and optimize recovery potential. This phase underscores the complexity of managing multiple, interrelated complications and the importance of dynamic clinical reasoning in adapting the care plan to evolving patient needs.

Section 3

As the multidisciplinary team continues to manage the patient's fluid status and respiratory function, the patient's response to the interventions begins to reveal new challenges. Despite the cautious administration of diuretics to address fluid overload, the patient exhibits an unexpected decrease in urine output, now measuring at less than 20 mL/hour. This oliguria suggests a further decline in renal function, potentially exacerbated by the underlying acute kidney injury and the diuretic therapy itself. The team orders a renal ultrasound to evaluate for any obstructive causes and re-evaluates the patient's fluid balance strategy, considering the possibility of prerenal azotemia due to hypovolemia or intrarenal causes from nephrotoxic effects.

In tandem with these renal concerns, the patient's respiratory status continues to warrant close observation. While supplemental oxygen therapy has improved oxygen saturation to 94%, the patient's respiratory rate remains elevated, and auscultation now reveals more pronounced bilateral crackles, indicating persistent pulmonary congestion. A repeat chest X-ray is obtained and shows bilateral infiltrates, raising the suspicion of acute respiratory distress syndrome (ARDS) secondary to systemic inflammatory response and fluid management challenges. Given these findings, the clinical team deliberates on the potential need for more advanced respiratory support, such as non-invasive ventilation or mechanical ventilation, while considering the delicate balance required to prevent further fluid overload.

This evolving scenario highlights the intricate interplay between renal function, fluid management, and respiratory care in the context of burn-related complications. The team must exercise precise clinical reasoning, integrating new diagnostic information and assessment findings to refine their treatment approach. The next steps will involve a coordinated effort to stabilize the patient's renal and respiratory function, while continuously monitoring for additional complications that may arise as the patient's condition evolves.

Section 4

As the team continues to manage the patient's complex condition, attention turns to the new diagnostic results. The renal ultrasound reveals no evidence of obstructive uropathy, supporting the hypothesis of an intrinsic renal cause for the oliguria. Laboratory results further corroborate this, with serum creatinine levels rising to 2.5 mg/dL and blood urea nitrogen (BUN) increasing to 45 mg/dL, indicating worsening renal function. The urine analysis shows a fractional excretion of sodium (FENa) greater than 2%, suggesting acute tubular necrosis rather than a prerenal cause. These findings prompt the team to reconsider the use of nephrotoxic diuretics and to adjust the fluid management strategy to prevent further renal compromise.

Simultaneously, the respiratory team reviews the new chest X-ray findings alongside the patient's clinical presentation. The bilateral infiltrates, coupled with the elevated respiratory rate and persistent crackles, confirm the development of acute respiratory distress syndrome (ARDS). The patient's arterial blood gas (ABG) results show a partial pressure of oxygen (PaO2) of 58 mmHg on a 50% oxygen mask, with a PaO2/FiO2 ratio of 116, reinforcing the severity of the pulmonary impairment. In response, the team initiates non-invasive positive pressure ventilation (NIPPV) to improve oxygenation while minimizing the risk of ventilator-associated lung injury.

These diagnostic insights guide the multidisciplinary team in refining their treatment approach, carefully balancing the need to support renal recovery while optimizing respiratory function. The team remains vigilant for potential complications such as infection or the progression of systemic inflammatory response syndrome (SIRS), which could further destabilize the patient. Continuous monitoring of vital signs, renal function, and respiratory status will be crucial in this next phase of care, as they adapt interventions to the patient's evolving clinical picture.

Section 5

As the multidisciplinary team continues to manage the patient's condition, a new complication arises. Over the next 24 hours, the patient develops a fever of 101.5°F (38.6°C) and an elevated heart rate of 110 beats per minute. The patient's blood pressure remains stable at 118/72 mmHg, but there is a noticeable increase in respiratory effort despite ongoing non-invasive positive pressure ventilation. The team is concerned about the possibility of an infectious process, given the patient's immunocompromised state and extensive burn injuries.

To investigate further, blood cultures are obtained, and a complete blood count (CBC) reveals a white blood cell count of 16,000/µL with a left shift, indicating a possible bacterial infection. The C-reactive protein (CRP) level is elevated at 12 mg/dL, supporting the suspicion of an inflammatory or infectious etiology. Concurrently, urine output has decreased slightly to 20 mL/hour, and serum lactate levels have risen to 3.8 mmol/L, suggesting a systemic response to an acute stressor or infection.

In response to these findings, the team initiates broad-spectrum antibiotic therapy while awaiting culture results, mindful of the need to avoid further renal compromise. They also adjust the fluid management plan to ensure adequate organ perfusion without exacerbating the patient's already compromised respiratory status. The team remains vigilant for signs of sepsis and monitors the patient's clinical parameters closely, prepared to escalate care if necessary. These developments underscore the complexity of managing a critically ill patient with burns, ARDS, and evolving complications, necessitating a coordinated and dynamic approach to care.