A patient with acute kidney injury presents with hyperkalemia, pitting edema, and respiratory crackles. Which of the following nursing interventions should be prioritized to address the hyperkalemia and prevent its complications?

C) Administer calcium gluconate to protect cardiac cells

A) Administer intravenous diuretics to reduce fluid overload

B) Provide supplemental oxygen to improve respiratory function

C) Administer calcium gluconate to protect cardiac cells

D) Initiate dialysis to remove excess potassium

A patient with acute kidney injury presents with hyperkalemia, metabolic acidosis, and pulmonary congestion. Which nursing intervention is the highest priority in this scenario?

A) Administering calcium gluconate to stabilize cardiac membranes

B) Initiating fluid restriction to prevent further overload

C) Administering intravenous diuretics to reduce fluid volume

D) Monitoring neurological status for signs of worsening uremia

A patient receiving intravenous diuretics for fluid overload presents with decreased pitting edema and improved lung sounds. Despite these improvements, the patient has persistent neurological symptoms and metabolic acidosis. Which nursing intervention should be prioritized to address the patient's current condition?

B) Prepare the patient for continuous renal replacement therapy (CRRT)

A) Administer a potassium supplement to address hypokalemia

B) Prepare the patient for continuous renal replacement therapy (CRRT)

C) Increase oxygen supplementation to improve oxygen saturation

D) Encourage the patient to increase oral fluid intake to correct acidosis

A patient undergoing treatment for fluid overload has shown improvement in edema and oxygen saturation but continues to have elevated potassium levels and signs of uremia. The healthcare team is considering continuous renal replacement therapy (CRRT). What is the primary nursing consideration when preparing the patient for CRRT?

B) Monitor the patient's hemodynamic status closely to avoid hypotension.

A) Ensure the patient has adequate nutritional intake to prevent catabolism.

B) Monitor the patient's hemodynamic status closely to avoid hypotension.

C) Educate the patient about potential dietary changes to manage potassium levels.

D) Verify the patient's understanding of the procedure to reduce anxiety.

A patient with mild hydronephrosis and acute kidney injury is being considered for continuous renal replacement therapy (CRRT) due to persistent uremic encephalopathy. Which of the following nursing interventions is most important to implement prior to initiating CRRT?

C) Assess the patient's fluid status and hemodynamic stability.

A) Administer a diuretic to increase urine output.

B) Review the patient's current medication list for nephrotoxic drugs.

C) Assess the patient's fluid status and hemodynamic stability.

D) Obtain a blood sample for electrolyte and renal function analysis.

A patient with acute kidney injury and mild hydronephrosis is being considered for continuous renal replacement therapy (CRRT) due to persistent uremic encephalopathy and electrolyte imbalances. Which nursing intervention is most critical to prioritize before initiating CRRT?

A) Assessing the patient's blood pressure for hemodynamic stability

B) Administering a diuretic to promote urine output

C) Preparing the patient for a renal biopsy to evaluate kidney function

D) Educating the patient and family about dietary restrictions related to kidney function

A patient undergoing continuous renal replacement therapy (CRRT) for acute kidney injury due to obstructive uropathy presents with mild peripheral edema and bibasilar crackles. Which nursing action is most appropriate to address these signs while maintaining hemodynamic stability?

B) Collaborate with the healthcare provider to adjust the CRRT settings for gradual fluid removal.

A) Increase the ultrafiltration rate to enhance fluid removal.

B) Collaborate with the healthcare provider to adjust the CRRT settings for gradual fluid removal.

C) Administer diuretics to promote diuresis and reduce fluid overload.

D) Encourage the patient to increase oral fluid intake to dilute serum electrolytes.

A patient undergoing continuous renal replacement therapy (CRRT) for acute kidney injury presents with persistent lethargy and confusion despite improvements in serum potassium levels. A CT scan reveals an obstructive stone in the left ureter. Which nursing intervention is most appropriate to address the potential cause of these symptoms?

C) Collaborate with the healthcare team to prioritize urology intervention for stone removal.

A) Increase the ultrafiltration rate on the CRRT machine to enhance fluid removal.

B) Administer prescribed diuretics to further reduce fluid overload.

C) Collaborate with the healthcare team to prioritize urology intervention for stone removal.

D) Reduce the CRRT flow rate to allow for slower toxin clearance.

A patient undergoing Continuous Renal Replacement Therapy (CRRT) for acute kidney injury develops hypotension and tachycardia 36 hours into the therapy. What is the most appropriate initial nursing intervention to address the patient's current hemodynamic instability?

B) Administer a bolus of intravenous normal saline as ordered.

A) Increase the ultrafiltration rate to remove excess fluid.

B) Administer a bolus of intravenous normal saline as ordered.

C) Prepare to administer vasopressors immediately.

D) Reassess the patient's intake and output to verify fluid balance.

A patient undergoing continuous renal replacement therapy (CRRT) for acute kidney injury exhibits hypotension and tachycardia. Which of the following interventions should the nurse prioritize to address the patient's hemodynamic instability?

B) Administer a fluid bolus to counteract potential hypovolemia.

A) Increase the ultrafiltration rate to remove excess fluid.

B) Administer a fluid bolus to counteract potential hypovolemia.

C) Discontinue CRRT immediately to prevent further fluid imbalance.

D) Initiate vasopressor therapy to stabilize blood pressure.

acute kidney injury - Nursing Case Study

Pathophysiology

• Primary mechanism: Reduced renal blood flow leads to decreased glomerular filtration rate (GFR), often due to hypovolemia, hypotension, or heart failure, causing impaired kidney function and waste accumulation.

• Secondary mechanism: Tubular injury, often from ischemia or nephrotoxins, results in structural damage and dysfunction, leading to obstruction and back-leak of filtrate, further reducing GFR.

• Key complication: Fluid overload and electrolyte imbalances, such as hyperkalemia and metabolic acidosis, can arise, posing risks for cardiac and neurologic complications.

Patient Profile

Demographics:

65-year-old male, retired construction worker

History:

• Key past medical history: Hypertension, Type 2 Diabetes, Chronic Back Pain

• Current medications: Metformin, Lisinopril, Ibuprofen as needed

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Decreased urine output and swelling in legs

• Key symptoms: Fatigue, shortness of breath, confusion, decreased appetite

• Vital signs: Blood pressure 160/98 mmHg, heart rate 105 bpm, respiratory rate 24 breaths per minute, temperature 99.1°F, oxygen saturation 92% on room air

Section 1

As the healthcare team proceeds with the initial assessment, several concerning findings emerge. The patient's physical examination reveals pitting edema in both lower extremities, extending up to the knees. Lung auscultation detects bilateral crackles, indicating possible pulmonary congestion due to fluid overload. The patient's tachycardia and elevated blood pressure suggest compensatory mechanisms at play, possibly stemming from the body's effort to maintain perfusion despite compromised renal function. Neurological assessment shows mild disorientation and difficulty concentrating, which could be attributed to uremic toxins affecting the central nervous system.

Laboratory tests further illuminate the patient's condition. Blood urea nitrogen (BUN) and creatinine levels are markedly elevated, confirming the presence of acute kidney injury. Serum potassium is measured at 6.2 mmol/L, indicating hyperkalemia, which poses an immediate risk for cardiac arrhythmias. Additionally, arterial blood gas analysis reveals a mild metabolic acidosis with a pH of 7.32 and bicarbonate level of 18 mEq/L, corroborating the metabolic derangements observed. Urinalysis indicates the presence of granular casts and mild proteinuria, suggesting tubular injury.

In response to these findings, the medical team initiates interventions aimed at stabilizing the patient and addressing the complications. Intravenous diuretics are administered to manage fluid overload, alongside calcium gluconate to counteract the effects of hyperkalemia on cardiac cells. The patient's response to these interventions will be closely monitored, with continuous cardiac telemetry to detect any arrhythmias and regular reassessment of vital signs and laboratory values. The team's focus remains on preventing further renal damage while managing the current complications, setting the stage for the next phase of the patient's treatment and recovery plan.

Section 2

As the patient undergoes treatment, the healthcare team observes a notable change in the patient's status. The administration of intravenous diuretics has successfully reduced the patient's fluid overload, as evidenced by a decrease in lower extremity pitting edema and improved lung auscultation findings, with significantly diminished crackles bilaterally. The patient reports feeling slightly less short of breath, and oxygen saturation levels have increased from 90% to 94% on room air. However, despite these improvements, the team identifies new challenges that require attention.

A repeat set of laboratory tests reveals that while serum potassium levels have decreased to 5.5 mmol/L following the administration of calcium gluconate and diuretics, they remain above the normal range, necessitating continued vigilance against potential cardiac complications. Furthermore, the patient's neurological status remains a concern. Although there is slight improvement in disorientation, the patient still exhibits difficulty concentrating, suggesting persistent effects of uremic toxins. The metabolic acidosis has shown minimal improvement, with the pH rising to 7.34 and bicarbonate level to 19 mEq/L, indicating that the metabolic derangements are not yet fully corrected.

In light of these findings, the medical team plans to adjust the treatment strategy. They consider introducing renal replacement therapy, such as continuous renal replacement therapy (CRRT), to more effectively manage electrolyte imbalances and remove uremic toxins. This decision requires careful consideration of the patient's hemodynamic stability and ongoing monitoring for any potential complications. The team's goal is to stabilize the patient's condition further and promote renal recovery, setting a course for the next phase of clinical management. This plan emphasizes the importance of continuous evaluation and adaptation of the treatment approach to address the evolving needs of the patient effectively.

Section 3

As the healthcare team continues to manage the patient's condition, a new set of diagnostic results provides further insight into the patient's ongoing challenges and guides the next steps in treatment. A follow-up renal ultrasound reveals mild hydronephrosis, suggesting the possibility of obstructive uropathy as a contributing factor to the acute kidney injury. This finding prompts the team to consider additional imaging studies, such as a CT scan, to evaluate for potential causes of obstruction, such as renal stones or external compression from surrounding structures.

Concurrent laboratory tests reveal that serum creatinine levels have plateaued at 3.2 mg/dL, indicating a lack of significant renal function improvement despite initial treatment efforts. Meanwhile, although serum potassium has decreased to 5.2 mmol/L, it remains at the upper limit of normal, necessitating continued monitoring for arrhythmias. The patient's blood pressure has stabilized at 118/76 mmHg, and heart rate remains steady at 82 beats per minute, suggesting hemodynamic stability that may support the initiation of continuous renal replacement therapy (CRRT) as planned.

Despite the partial correction of metabolic acidosis, the patient's mental status remains unchanged, with persistent lethargy and confusion, likely secondary to uremic encephalopathy. Recognizing the need for more aggressive management of uremic toxins, the team discusses the initiation of CRRT to facilitate toxin removal and address electrolyte imbalances more effectively. This approach is expected to aid in improving the patient's neurological status and support overall recovery. The implementation of CRRT will require meticulous monitoring of fluid balance and hemodynamic parameters to avoid potential complications, underscoring the need for ongoing clinical vigilance and adaptation of the treatment plan.

Section 4

The healthcare team proceeds with the initiation of continuous renal replacement therapy (CRRT) to address the persistent metabolic derangements and uremic symptoms. Within the first 24 hours of CRRT, there is a noticeable improvement in the patient's electrolyte balance; serum potassium levels decrease to 4.5 mmol/L, indicating effective removal of excess potassium and reducing the risk of cardiac arrhythmias. However, despite these improvements, the patient continues to exhibit signs of volume overload, manifesting as mild peripheral edema and bibasilar crackles upon auscultation. These findings suggest that ultrafiltration rates may need to be adjusted to optimize fluid removal without compromising hemodynamic stability.

Concurrently, new diagnostic results from the CT scan reveal a 1.5 cm obstructive stone located in the left ureter, confirming a diagnosis of obstructive uropathy contributing to the acute kidney injury. This finding necessitates a multidisciplinary approach, involving urology for potential interventions such as ureteral stenting or lithotripsy to relieve the obstruction and prevent further renal compromise. Additionally, the patient's persistent lethargy and confusion, albeit slightly improved, indicate a continued need for effective uremic toxin clearance through CRRT.

The healthcare team now faces the critical task of balancing the management of the obstructive uropathy with ongoing renal support. A decision is made to collaborate closely with urology to expedite the removal of the obstruction while maintaining CRRT to ensure ongoing toxin clearance and electrolyte management. This integrated approach highlights the importance of addressing both the underlying cause of the acute kidney injury and the symptomatic management of renal failure, requiring careful clinical reasoning and coordinated care to guide the patient's recovery process.

Section 5

As the healthcare team continues to manage the patient's acute kidney injury, a change in patient status prompts further assessment and intervention. Approximately 36 hours into CRRT, the patient's blood pressure begins to trend downward, with measurements showing hypotension at 90/60 mmHg. This hemodynamic instability raises concerns about the potential for excessive fluid removal during CRRT and necessitates immediate evaluation of the ultrafiltration rates. Concurrently, the patient develops tachycardia, with a heart rate increasing to 110 beats per minute, which may indicate compensatory mechanisms in response to fluid shifts or ongoing systemic stress.

Laboratory results reveal a mild decrease in hemoglobin levels to 9.8 g/dL, suggesting the possibility of hemodilution or subtle ongoing blood loss, which could contribute to the hypotensive episodes. Additionally, despite the improvements in serum potassium, the patient's creatinine levels remain elevated at 4.2 mg/dL, reflecting persistent renal impairment. The nursing team diligently monitors the patient's intake and output, carefully adjusting CRRT settings to optimize fluid balance while preventing further hemodynamic compromise.

This evolving situation requires the healthcare team to refine their clinical reasoning by closely monitoring trends in vital signs and laboratory data, ensuring timely interventions. Coordination with urology becomes increasingly urgent to address the obstructive uropathy, as relieving the obstruction may provide significant relief to the renal system and improve overall fluid management. The patient's care plan is adjusted to include the potential use of vasopressors to support blood pressure if necessary, while ongoing communication with the multidisciplinary team remains crucial to navigate these challenges efficiently and guide the patient towards stabilization and recovery.