burns - Nursing Case Study

Pathophysiology

• Primary mechanism: Tissue destruction occurs due to direct heat exposure, leading to cell membrane disruption, protein denaturation, and coagulation necrosis. This results in the release of inflammatory mediators, increasing vascular permeability and causing edema.

• Secondary mechanism: The systemic inflammatory response triggered by severe burns can lead to hypovolemia as fluid shifts from the intravascular to interstitial spaces. This can cause decreased cardiac output and potential shock if not promptly managed.

• Key complication: Burn injury can lead to impaired thermoregulation and increased risk of infection due to skin barrier loss, necessitating vigilant monitoring and aseptic care to prevent sepsis.

Patient Profile

Demographics:

45-year-old male, construction worker

History:

• Key past medical history: Hypertension, Type 2 Diabetes

• Current medications: Metformin, Lisinopril

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Severe pain and blisters on arms and legs

• Key symptoms: Redness, swelling, blistering on 25% of body surface area, difficulty in movement, signs of infection (pus formation)

• Vital signs: Temperature 38.5°C (101.3°F), Heart rate 110 bpm, Blood pressure 145/90 mmHg, Respiratory rate 22 breaths per minute

Section 1

New Complications:

As the clinical team continues to manage the patient’s burn injuries, new complications begin to emerge. Despite initial interventions aimed at stabilizing his condition, the patient exhibits signs of worsening systemic involvement. The patient develops increasing difficulty breathing, with an oxygen saturation level dropping to 88% on room air, necessitating supplemental oxygen therapy. Auscultation of the lungs reveals diminished breath sounds and the presence of crackles, indicating possible pulmonary edema or acute respiratory distress syndrome (ARDS) secondary to the systemic inflammatory response from the burns.

Laboratory results reveal a marked leukocytosis with a white blood cell count of 18,000/mm³, suggesting a heightened inflammatory or infectious process. Additionally, the patient’s renal function tests show elevated creatinine levels at 2.2 mg/dL, indicating acute kidney injury, likely due to hypovolemia and the nephrotoxic effects of myoglobin release from muscle breakdown. Blood cultures are pending, but there is a high suspicion of bacteremia as the patient continues to exhibit fever and tachycardia despite antipyretic treatment. The care team must now address these complications promptly, optimizing fluid resuscitation, considering broad-spectrum antibiotics, and closely monitoring the patient's respiratory and renal status to prevent further deterioration.

Given these new developments, the clinical team needs to adjust the management plan to prioritize aggressive fluid management, potential initiation of renal replacement therapy, and escalation of respiratory support if necessary. This scenario demands careful monitoring and reassessment to prevent the progression to multi-organ dysfunction syndrome (MODS). The patient’s evolving condition underscores the complexity of burn management and the necessity for a multidisciplinary approach to address the interconnected challenges that arise in severe burn cases.

Section 2

The patient, Mr. J., who sustained severe burn injuries, continues to be closely monitored due to the recent complications in his clinical status. The new diagnostic results highlight further developments that require immediate attention. A repeat chest X-ray indicates bilateral diffuse infiltrates, solidifying the suspicion of acute respiratory distress syndrome (ARDS). His arterial blood gas analysis reveals a PaO2 of 55 mmHg on 100% oxygen via non-rebreather mask, suggesting severe hypoxemia. A decision is made to transition Mr. J. to mechanical ventilation to better manage his respiratory distress and maintain adequate oxygenation.

Further laboratory workup reveals an increase in serum lactate to 4.0 mmol/L, indicating possible tissue hypoperfusion and ongoing metabolic stress. The elevated creatinine level of 2.7 mg/dL suggests worsening acute kidney injury, prompting the nephrology team to consider initiating renal replacement therapy to manage his fluid balance and prevent further renal compromise. The pending blood cultures eventually return positive for Pseudomonas aeruginosa, confirming the presence of a bloodstream infection. Consequently, broad-spectrum antibiotics are tailored to include anti-pseudomonal coverage, with the infectious disease team closely involved in adjusting the antimicrobial regimen.

These new findings necessitate a reassessment of Mr. J.'s fluid management strategy. The critical care team emphasizes the importance of balancing aggressive fluid resuscitation to support circulation while avoiding fluid overload that could exacerbate pulmonary edema. The interdisciplinary team collaborates to address these complex issues, coordinating care to stabilize Mr. J.'s condition and prevent the progression to multi-organ dysfunction syndrome (MODS). This comprehensive approach underscores the necessity for vigilant monitoring and timely intervention in the management of severe burn injuries.

Section 3

As the multidisciplinary team continues to address Mr. J.'s complex clinical picture, they closely monitor his response to the interventions initiated. With the transition to mechanical ventilation, initial settings are adjusted to ensure adequate oxygenation and ventilation. Mr. J. is placed on a protective lung strategy with low tidal volumes and a high positive end-expiratory pressure (PEEP) of 12 cm H2O to improve oxygenation while minimizing ventilator-induced lung injury. Over the next 24 hours, his oxygenation status begins to show slight improvement, with a PaO2 rising to 68 mmHg on an FiO2 of 0.6, indicating a positive response to mechanical support.

However, the team remains vigilant as Mr. J.'s condition is further complicated by the ongoing renal impairment. A decision is made to initiate continuous renal replacement therapy (CRRT) to manage his fluid status effectively and address the rising creatinine levels, which have now reached 3.1 mg/dL. This intervention aims to alleviate metabolic stress, optimize fluid balance, and prevent further renal damage. The nephrology team collaborates with critical care specialists to fine-tune the CRRT settings, ensuring optimal clearance of solutes while maintaining hemodynamic stability.

Despite these interventions, Mr. J. develops a new complication, manifesting as an acute drop in blood pressure with readings of 85/50 mmHg, and his heart rate increases to 115 bpm. This hypotensive episode raises concern for septic shock, likely exacerbated by the bloodstream infection with Pseudomonas aeruginosa. The critical care team promptly initiates vasopressor support with norepinephrine to stabilize his hemodynamics, while adjustments to the antibiotic regimen are made to ensure adequate coverage. This situation highlights the dynamic nature of Mr. J.'s condition, necessitating ongoing clinical reasoning and adaptation of the treatment plan to address evolving challenges and prevent further deterioration. The interdisciplinary approach remains crucial in navigating these complexities to support Mr. J.'s recovery.

Section 4

As the critical care team continues to manage Mr. J.'s complex condition, they note a change in his status that warrants immediate attention. Over the next 12 hours, Mr. J. exhibits signs of increased respiratory distress despite being on mechanical ventilation. His respiratory rate rises to 28 breaths per minute, and his oxygen saturation drops to 88% on the current ventilator settings. Auscultation reveals diminished breath sounds in the right lower lung field, raising suspicion of a potential pneumothorax or pleural effusion, which could be contributing to his respiratory compromise. A stat chest X-ray is ordered to investigate further.

Meanwhile, Mr. J.'s renal parameters continue to be closely monitored. The CRRT is titrated to optimize fluid removal and solute clearance, yet his urine output remains minimal, and creatinine levels show a modest increase to 3.4 mg/dL. These findings suggest ongoing renal impairment, which may be exacerbated by the hypotensive episodes and the potentially nephrotoxic effects of antimicrobial therapy. The nephrology team considers the possibility of adjusting the CRRT prescription or exploring additional renal protective strategies to prevent further deterioration of kidney function.

The results of the chest X-ray return, revealing a moderate-sized right-sided pleural effusion. This new complication necessitates further intervention to improve Mr. J.'s respiratory status. The team decides to perform a thoracentesis to relieve the pressure on his lungs and enhance ventilation. Additionally, the critical care team reassesses the antibiotic coverage, ensuring it remains appropriate for the treatment of Pseudomonas aeruginosa while considering dosing adjustments to mitigate renal impact. These developments highlight the need for continuous reassessment and adaptation of the treatment plan, underscoring the importance of a collaborative, interdisciplinary approach in managing Mr. J.'s evolving clinical picture.

Section 5

As the critical care team proceeds with the thoracentesis, they successfully remove 500 mL of serous fluid from Mr. J.'s right pleural space. Following the procedure, there is an immediate improvement in his respiratory parameters; his oxygen saturation rises to 94%, and his respiratory rate decreases to 22 breaths per minute. The team is encouraged by this positive response, yet remains vigilant for any signs of reaccumulation of fluid or other potential complications. Repeat auscultation of the lungs demonstrates improved breath sounds on the right side, confirming effective intervention. However, Mr. J. remains on mechanical ventilation, and further monitoring is required to assess his overall respiratory recovery.

Concurrently, attention turns to Mr. J.'s renal function. Despite optimizing the CRRT settings, his urine output is still negligible, and laboratory tests show a continued rise in creatinine, now at 3.8 mg/dL. The nephrology team decides to implement a renal protective strategy that includes adjusting the doses of nephrotoxic medications and considering the use of alternative agents with less renal impact. They also recommend maintaining a strict balance of fluid intake and output to prevent further renal strain. The interdisciplinary team discusses these modifications, emphasizing the need for tailored adjustments to Mr. J.'s complex and dynamic condition.

As the team continues to monitor Mr. J., they note an unexpected temperature spike to 102.5°F, accompanied by an increase in white blood cell count to 18,000/mm³. These findings raise the suspicion of a new or worsening infection, prompting blood cultures and a review of the current antibiotic regimen. The critical care and infectious disease teams collaborate to ensure that antimicrobial coverage remains comprehensive, particularly against resistant organisms like Pseudomonas aeruginosa, while minimizing further renal compromise. This new development highlights the ongoing challenges in managing Mr. J.'s care and underscores the necessity for diligent observation and timely intervention as his condition evolves.