Examkin

Soru

Zorluk: OrtaSurgical and Procedural Interventions

A 61-year-old woman is brought to the emergency department due to a 24-hour history of severe left-sided flank pain, shaking chills, and confusion. Her temperature is 39.4°C (102.9°F), blood pressure is 86/50 mm Hg, pulse is 124/min, and respirations are 24/min. Physical examination reveals dry mucous membranes and marked left costovertebral angle tenderness. Laboratory studies demonstrate a leukocyte count of 21,000/mm³ with 15% bands. Serum creatinine is 1.8 mg/dL (baseline 0.9 mg/dL). A non-contrast computed tomography scan of the abdomen and pelvis reveals a 9-mm radiopaque calculus in the proximal left ureter with moderate proximal hydroureteronephrosis and surrounding perinephric fat stranding.

Arrange the following interventions in the most appropriate chronological sequence for the management of this patient.

  1. 1Initiate aggressive intravenous isotonic fluid resuscitation and obtain blood and urine cultures
  2. 2Administer empiric broad-spectrum intravenous antibiotics
  3. 3Perform emergent percutaneous nephrostomy or retrograde ureteral stenting
  4. 4Perform definitive stone fragmentation and extraction

Cevap

The correct sequence is: 1) Initiate intravenous fluid resuscitation and obtain cultures, 2) Administer broad-spectrum intravenous antibiotics, 3) Perform emergent percutaneous nephrostomy or retrograde ureteral stenting, and 4) Perform definitive stone fragmentation and extraction at a later date.
The management of an infected, obstructing ureteral stone requires a carefully staged approach prioritized by life-saving interventions over definitive anatomic repair. The first step is initial hemodynamic stabilization. Because the patient is in septic shock (hypotension, tachycardia), immediate isotonic intravenous fluids are necessary. Concurrently, blood and urine cultures must be drawn prior to the administration of antibiotics to maximize the chance of identifying the causative organism. Following culture acquisition, broad-spectrum intravenous antibiotics must be administered promptly to aggressively treat the systemic infection. Once the patient is hemodynamically stabilized and antimicrobials are circulating, emergent urologic decompression of the obstructed collecting system is mandatory to achieve source control. This is accomplished via either a percutaneous nephrostomy tube or retrograde double-J ureteral stenting. Attempting definitive stone removal (e.g., ureteroscopy with laser lithotripsy) in the acute setting of purulent urine and high renal pelvic pressures is strongly contraindicated, as the required irrigation fluid will force infected material into the systemic circulation and precipitate overwhelming sepsis. Therefore, definitive stone management is always delayed until the patient has fully recovered from the acute infectious episode.

Adım Adım Çözüm

1
Recognize the presence of an infected obstructing ureteral stone with septic shock.
The patient requires immediate life-saving stabilization before treating the physical obstruction.
Septic shock (hypotension, altered mental status, fever) is the immediate threat to life.
2
Prioritize hemodynamic stabilization and diagnostic culture acquisition.
Isotonic IV fluids are given to treat hypotension, and cultures are drawn.
Fluids restore perfusion, and cultures must be obtained prior to antibiotics to ensure accurate pathogen identification.
3
Initiate empiric antimicrobial therapy.
Broad-spectrum IV antibiotics are administered.
Early antibiotic administration is a cornerstone of sepsis survival and prepares the patient for invasive source control.
4
Achieve source control by decompressing the obstructed kidney.
A percutaneous nephrostomy tube or ureteral stent is placed.
Antibiotics alone cannot clear an infection in an obstructed, pressurized, purulent space. Decompression is a surgical emergency.
5
Defer definitive stone management.
Lithotripsy or ureteroscopy is scheduled for weeks later.
Breaking the stone or flushing the ureter during acute infection increases renal pelvic pressure, causing pyelovenous backflow of bacteria and worsening septic shock.

Anahtar Kavram

Management sequence for infected obstructing ureteral stones (urologic emergency)
Tahmini Süre:1m 30s
Bu soruyu puanla

Konular

Surgical and Procedural Interventions

Bu konudan daha fazla soru