pressure injury - Nursing Case Study

Pathophysiology

• Primary mechanism: Pressure-induced ischemia occurs when prolonged pressure over bony prominences compresses blood vessels, reducing blood flow and oxygen supply to the skin and underlying tissues, leading to tissue necrosis.

• Secondary mechanism: Shear forces exacerbate tissue damage by distorting and tearing capillaries within the compressed tissues, further compromising blood circulation and contributing to cell death.

• Key complication: The resultant tissue necrosis can progress to open ulcers, increasing the risk of infection and complicating wound healing, which may require extended care and potential surgical intervention.

Patient Profile

Demographics:

67 years old, female, retired school teacher

History:

• Key past medical history: Type 2 diabetes, hypertension, osteoarthritis

• Current medications: Metformin, Lisinopril, Acetaminophen

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Worsening pressure injury on the sacrum

• Key symptoms: Increased pain and redness at the site, foul-smelling discharge, mild fever

• Vital signs: Temperature 38.3°C, Heart rate 102 bpm, Blood pressure 145/88 mmHg, Respiratory rate 20 breaths per minute, Oxygen saturation 94% on room air

Section 1

New Diagnostic Results:

Following the initial assessment, the healthcare team ordered a series of diagnostic tests to evaluate the extent of the patient's pressure injury and any underlying complications. A wound culture was obtained from the sacral ulcer, revealing the presence of methicillin-resistant Staphylococcus aureus (MRSA), which explains the foul-smelling discharge and elevated temperature. Blood tests showed an elevated white blood cell count of 14,500 cells/μL, indicating a systemic inflammatory response likely due to the infection. C-reactive protein (CRP) levels were also elevated at 95 mg/L, further supporting the presence of inflammation. An X-ray of the sacral area was performed to assess for potential osteomyelitis; although no bone involvement was evident at this stage, the risk remains high given the location and severity of the infection.

These findings prompted a reassessment of the patient's management plan. The presence of MRSA requires initiation of intravenous vancomycin, as the patient has a known allergy to penicillin, and oral antibiotics would be insufficient for treating the systemic infection. The care team collaborates to enhance the pressure injury management strategy, emphasizing the importance of frequent repositioning, utilization of pressure-relieving devices, and meticulous wound care protocols to prevent further deterioration.

The results underscore the need for vigilant monitoring for potential complications, such as sepsis or the development of osteomyelitis, which could significantly alter the patient’s clinical trajectory. The interdisciplinary team, including wound care specialists, considers the possibility of surgical debridement if conservative measures fail to control the infection. The patient and her family are educated about the importance of glycemic control to aid in wound healing, given her history of type 2 diabetes, and dietary consultations are arranged to optimize nutritional support. These steps aim to stabilize the patient’s condition and prevent further complications, setting the stage for the next phase of her recovery journey.

Section 2

Change in Patient Status

Despite the initiation of intravenous vancomycin and diligent wound care, the patient's condition shows signs of deterioration. Over the past 48 hours, her vital signs reveal a concerning trend: her heart rate has increased to 110 beats per minute, her blood pressure has dropped to 92/58 mmHg, and her temperature remains elevated at 38.7°C (101.7°F). These changes raise the suspicion of a developing systemic infection and possible sepsis. The patient has also become increasingly lethargic, with a decreased level of responsiveness, which prompts an urgent re-evaluation by the healthcare team.

In response to these alarming changes, additional laboratory tests are ordered to assess the severity of the systemic infection. A repeat white blood cell count shows a further increase to 18,000 cells/μL, and a procalcitonin level is elevated at 5.5 ng/mL, both indicators of a heightened inflammatory response. Blood cultures are obtained to identify any bacteremia, which could confirm sepsis. Meanwhile, the patient's urine output has decreased significantly, suggesting the early stages of acute kidney injury, a potential complication of sepsis.

With these developments, the interdisciplinary team must act swiftly to prevent further decline. The patient's fluid resuscitation is intensified to stabilize her blood pressure and improve perfusion. A sepsis protocol is initiated, involving broad-spectrum antibiotics to cover potential organisms, in addition to vancomycin, until culture results are conclusive. The team revisits the option of surgical debridement to control the source of infection. These measures are crucial in altering the patient's trajectory and preventing the progression of life-threatening complications, underscoring the need for continuous monitoring and timely interventions as her recovery unfolds.

Section 3

Response to Interventions

Following the implementation of the sepsis protocol and intensified fluid resuscitation, the healthcare team observed initial signs of stabilization in the patient's condition. Over the next 12 hours, her heart rate began to decrease, settling to 98 beats per minute, and her blood pressure improved modestly to 100/60 mmHg. These improvements suggested a positive response to the fluid therapy and antibiotic regimen. The patient's temperature, however, remained elevated at 38.5°C (101.3°F), indicating that the infection was not yet fully controlled. Her level of consciousness showed slight improvement, as she responded more readily to verbal stimuli, although she remained fatigued.

New diagnostic results began to inform the clinical team's approach. Blood cultures revealed the presence of methicillin-resistant Staphylococcus aureus (MRSA), aligning with the initial choice of vancomycin but emphasizing the need for continued aggressive management. Additionally, a repeat assessment of kidney function indicated a slight worsening of acute kidney injury, with serum creatinine rising to 2.1 mg/dL from a baseline of 1.1 mg/dL. This development necessitated careful management of fluid balance and consideration of nephrotoxic drug effects.

As the team evaluated the patient's progress, they recognized that while some physiological parameters were stabilizing, the persistent fever and kidney impairment required ongoing vigilance. The potential need for renal support therapies was discussed, and continuous monitoring of urine output and electrolytes was prioritized. The decision to proceed with surgical debridement was reaffirmed, given the confirmed presence of MRSA and persistent infection indicators, aiming to remove necrotic tissue and prevent further systemic complications. The healthcare team prepared for this next critical step, understanding that timely surgical intervention could be pivotal in altering the patient's recovery trajectory.

Section 4

New Complications

Despite initial signs of stabilization, the patient's condition began to show concerning developments over the following 24 hours. Her persistent fever escalated to 39.0°C (102.2°F), prompting the healthcare team to reassess her antibiotic regimen and consider the addition of linezolid to target the MRSA infection more aggressively. Concurrently, her respiratory status worsened, with an increased respiratory rate of 28 breaths per minute and oxygen saturation dipping to 88% on room air, necessitating supplemental oxygen. A chest X-ray revealed bilateral infiltrates, raising the suspicion of possible aspiration pneumonia or worsening pulmonary edema as secondary complications.

Furthermore, the patient's skin integrity continued to deteriorate. Despite meticulous offloading and wound care, the stage III pressure injury developed signs of infection, with increased erythema, warmth, and purulent discharge. Wound cultures confirmed polymicrobial growth, including Pseudomonas aeruginosa, necessitating the addition of an antipseudomonal antibiotic to her treatment regimen. The necrotic tissue burden and the presence of multiple organisms complicated the infection control, emphasizing the urgency of surgical debridement planned for the next day.

These developments required the clinical team to employ a multifaceted approach, balancing the need for adequate antimicrobial coverage with the risk of nephrotoxicity, given the patient's worsening kidney function. Her serum creatinine had increased further to 2.5 mg/dL, underscoring the challenge of managing her fluid status and drug dosages carefully. The team prioritized close monitoring, fluid management, and respiratory support, understanding that timely surgical intervention and tailored antibiotic therapy were crucial to prevent systemic deterioration and support recovery. The patient's care plan evolved to address these complications comprehensively, aiming to stabilize her condition and improve her prognosis.

Section 5

Change in Patient Status

Over the next 48 hours, the patient's condition demonstrated further complexities that required vigilant clinical reasoning and swift intervention. The addition of linezolid and an antipseudomonal antibiotic initially showed promise, as her fever began to subside slightly, stabilizing at 38.5°C (101.3°F). However, her respiratory function remained a significant concern. Despite supplemental oxygen via nasal cannula at 3 L/min, her oxygen saturation lingered around 90%, and she exhibited increasing work of breathing. Auscultation of her lungs revealed diffuse crackles, indicative of fluid overload or ongoing infectious processes. The healthcare team decided to escalate her respiratory support to a high-flow nasal cannula, hoping to improve her oxygenation without resorting to mechanical ventilation.

In the midst of these respiratory challenges, the patient’s renal function continued to decline. Her serum creatinine rose to 3.0 mg/dL, and her urine output decreased to less than 400 mL in 24 hours, raising concerns for acute kidney injury. The delicate balance between providing adequate fluid resuscitation to maintain perfusion and avoiding fluid overload was becoming increasingly difficult to manage. The nephrology team was consulted to optimize her fluid and electrolyte management, suggesting a cautious approach to diuretics given her tenuous hemodynamic status.

These developments necessitated a focused reassessment of the patient's overall status. The clinical team recognized the need for a more aggressive multimodal approach, involving not only pharmacological interventions but also adjustments in supportive care. With the pending surgical debridement, there was a concerted effort to stabilize her cardiovascular and respiratory systems to withstand the surgical stress and facilitate recovery. This included the implementation of a strict fluid balance chart, frequent monitoring of vital signs, and adjustment of the antimicrobial regimen as per culture sensitivity patterns. The priority was to create a stable platform for surgical intervention and prevent further systemic decline, with the ultimate goal of reversing the trajectory of her critical illness.