diverticulitis - Nursing Case Study

Pathophysiology

• Primary mechanism: Diverticulitis occurs when diverticula, small pouches that can form in the colon wall due to increased intraluminal pressure, become inflamed or infected, often due to the retention of fecal matter or bacteria.

• Secondary mechanism: Inflammation leads to localized tissue edema and compromised blood flow, which can further promote infection and the formation of micro-perforations or abscesses in the colon.

• Key complication: If untreated, inflammation may progress to bowel obstruction, abscess formation, or even perforation, potentially leading to peritonitis, a serious abdominal infection requiring prompt medical intervention.

Patient Profile

Demographics:

45-year-old female, office manager

History:

• Key past medical history: Hypertension, previous episodes of mild diverticulitis

• Current medications: Lisinopril 10 mg daily, Metformin 500 mg twice daily, occasional ibuprofen

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Severe abdominal pain

• Key symptoms: Lower left quadrant pain, fever, nausea, bloating, constipation, signs of developing peritonitis

• Vital signs: Temperature 101.3°F, heart rate 110 bpm, blood pressure 138/92 mmHg, respiratory rate 22 breaths per minute

Section 1

As the clinical team progresses with the initial assessment, it becomes evident that the patient's condition is intensifying. On physical examination, the patient's abdomen is significantly distended and tender, particularly in the lower left quadrant. Rebound tenderness is noted, raising concerns for peritoneal irritation. Her bowel sounds are hypoactive, suggesting a possible ileus or obstruction. The patient's white blood cell count is markedly elevated at 16,000/mm³, indicating a systemic inflammatory response. C-reactive protein levels are also elevated, further supporting the diagnosis of an acute inflammatory process. An urgent abdominal CT scan reveals thickening of the sigmoid colon wall, consistent with severe diverticulitis, and a small pericolic abscess measuring approximately 2.5 cm, which signifies a localized complication. There is no evidence of free air under the diaphragm, suggesting no overt perforation yet, but the presence of fluid pockets raises suspicions of early peritonitis.

The clinical team decides to initiate broad-spectrum intravenous antibiotics to combat infection and prevent further complications. The patient is placed on bowel rest with nothing by mouth (NPO) to reduce bowel activity and minimize further irritation of the colon. Intravenous fluids are administered to maintain hydration and electrolyte balance. Despite these interventions, the patient remains febrile, and her abdominal pain does not significantly improve, indicating that the abscess may not be adequately controlled by antibiotics alone. The decision is made to consult interventional radiology for potential percutaneous drainage of the abscess, a procedure that could alleviate the infection more directly and prevent further deterioration.

Throughout these developments, the clinical team must continuously evaluate the patient's response to treatment and remain vigilant for signs of worsening peritonitis or perforation. Monitoring vital signs, including temperature, heart rate, and blood pressure, is critical in detecting early signs of sepsis. The patient's status necessitates careful reassessment to determine the effectiveness of the current management plan and to decide on any necessary escalations in care, such as surgical intervention, if the condition does not stabilize. This stage of the case emphasizes the importance of timely and accurate clinical reasoning in managing moderate complications of diverticulitis.

Section 2

As the clinical team closely monitors the patient, a change in her status becomes apparent. Approximately 24 hours after the initiation of broad-spectrum intravenous antibiotics and bowel rest, the patient's vital signs reveal some concerning trends. Her temperature remains elevated at 39°C (102.2°F), and her heart rate has increased to 120 beats per minute, suggesting persistent or worsening systemic inflammation. Blood pressure readings have become more variable, with episodes of hypotension at 90/60 mmHg, raising suspicions of early sepsis. Despite adequate fluid resuscitation, her urine output has decreased to less than 30 mL/hour, indicating potential renal hypoperfusion or early acute kidney injury due to sepsis.

In light of these developments, the clinical team re-evaluates the efficacy of the current management plan. Laboratory results show a further increase in white blood cell count to 18,500/mm³, and repeat C-reactive protein levels remain elevated, confirming ongoing inflammation. The patient reports increased abdominal pain and a sense of fullness, with tenderness now extending diffusely across the abdomen. These findings suggest that the pericolic abscess may have progressed, potentially complicating into a more extensive infection or developing into a larger abscess that is not adequately controlled by antibiotics alone.

The decision is made to proceed with the planned interventional radiology consult for percutaneous drainage of the abscess. The team recognizes that timely drainage could prevent further complications, such as perforation or generalized peritonitis. Additionally, a surgical consult is obtained to evaluate for potential surgical intervention, should the patient's condition not improve following the drainage procedure. The clinical team remains vigilant, continuously reassessing the patient's response to interventions and monitoring for any signs of deterioration, underscoring the critical role of dynamic clinical reasoning in managing the evolving complexities of diverticulitis.

Section 3

As the interventional radiology team prepares for the percutaneous drainage of the abscess, the patient's condition continues to evolve. Despite the existing intervention strategies, a new complication emerges. The patient begins to exhibit signs of respiratory distress, characterized by an increased respiratory rate of 28 breaths per minute and decreased oxygen saturation levels hovering around 88% on room air. Auscultation of the lungs reveals diminished breath sounds at the bases, suggesting possible atelectasis or early pleural effusion, potentially secondary to the inflammatory process or fluid overload from aggressive resuscitation.

In response to these developments, the clinical team orders a chest X-ray and arterial blood gas analysis. The chest X-ray confirms the presence of small bilateral pleural effusions and some basal atelectasis. The arterial blood gases reveal a pH of 7.32, PaCO2 of 48 mmHg, and HCO3 of 22 mEq/L, indicating a mixed respiratory and metabolic acidosis. These findings prompt the team to initiate supplemental oxygen therapy to improve the patient's oxygenation and consider diuretic therapy to manage the fluid balance and respiratory status.

Concurrently, the patient's abdominal pain and distention continue to escalate, prompting a repeat CT scan of the abdomen. The imaging confirms an increase in the size of the pericolic abscess, now measuring 6 cm in diameter, and reveals the development of a new adjacent fluid collection, raising concerns for a potential fistula formation. This progression underscores the urgency of the drainage procedure and supports the need for continued close monitoring for any further signs of deterioration, including potential bowel perforation. The clinical team remains focused on integrating these findings into a comprehensive care plan, emphasizing the critical importance of timely interventions and adaptive clinical reasoning in navigating the complexities of this case.

Section 4

As the interventional radiology team proceeds with the percutaneous drainage of the abscess, the patient continues to exhibit signs of clinical instability despite interventions. The supplemental oxygen therapy has improved the patient's oxygen saturation to 92%, yet the respiratory rate remains elevated at 26 breaths per minute. The diuretic therapy has had a modest effect, with mild reduction in peripheral edema, but auscultation still reveals diminished breath sounds, particularly at the lung bases. The nursing team remains vigilant, conducting frequent assessments to detect any signs of further respiratory compromise or new complications.

In the hours following the drainage procedure, the patient begins to display new symptoms of systemic infection. The clinical team notes a rising temperature, now at 101.8°F, accompanied by tachycardia with a heart rate of 110 beats per minute. Laboratory results reveal a significant leukocytosis, with a white blood cell count of 18,000/mm^3, and elevated inflammatory markers, suggesting a potential septic process. Blood cultures are drawn, and broad-spectrum antibiotics are initiated to address the suspected infection. The team recognizes the importance of closely monitoring for signs of septic shock and ensures that fluid management is carefully balanced to support hemodynamic stability without exacerbating respiratory distress.

As the patient's abdominal condition remains a focal point of concern, the repeat CT scan findings necessitate a reconsideration of the surgical approach. The enlargement of the pericolic abscess and the emergence of a new fluid collection suggest a complex infectious process, possibly involving a fistula. Surgical consultation is sought to evaluate the need for exploratory surgery versus continued interventional radiological management. The multidisciplinary team collaborates to integrate these evolving clinical findings into a dynamic care plan, emphasizing the need for adaptable strategies to manage the patient's complex and interrelated health issues effectively.

Section 5

As the hours pass, the patient begins to exhibit a concerning change in status. Despite the initiation of broad-spectrum antibiotics, the patient's vital signs indicate a progression towards hemodynamic instability. The blood pressure has decreased to 90/60 mmHg, and the heart rate has climbed to 120 beats per minute, suggesting the onset of septic shock. The patient appears increasingly lethargic, with a Glasgow Coma Scale score dropping to 13. Oxygen saturation has decreased slightly to 90%, despite continued supplemental oxygen therapy, indicating a potential compromise in respiratory function. The nursing team notes that the patient's skin is cool and clammy, and capillary refill time is prolonged, further emphasizing the need for urgent intervention.

In response to these developments, the clinical team decides to adjust the treatment approach. Fluid resuscitation is prioritized to address the hypotension, with careful monitoring to avoid fluid overload due to the patient's respiratory vulnerability. Vasopressor support is considered to maintain adequate perfusion in light of the patient's declining blood pressure. The surgical team is consulted urgently, given the potential for an evolving abdominal catastrophe that might require immediate surgical intervention. The possibility of a fistula or further abscess formation is high on the differential, as these could be driving the systemic inflammatory response.

The team also focuses on reassessing the patient's antibiotic regimen, ensuring coverage is optimized based on preliminary culture data. The need for source control becomes increasingly apparent, and the decision is made to prepare the patient for possible exploratory surgery. The multidisciplinary team works swiftly to coordinate care, understanding that timely surgical intervention may be critical in reversing the patient's downward trajectory. As the case progresses, the emphasis remains on dynamic clinical reasoning, balancing aggressive treatment of the infection with careful management of the patient's respiratory and hemodynamic status.