TURP & TURP Syndrome
Considerations
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Coexisting disease common in this population
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Coronary disease, acute kidney injury, elderly
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Considerations of intraoperative complications:
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TURP syndrome ~2%
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Fluid overload/pulmonary edema; electrolyte abnormalities; dysrhythmias hyperglycinemia (blindness), hyperammonemia (encephalopathy), hypothermia
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Concealed hemorrhage
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Bladder perforation ~ 1%
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Septicemia (usually gram negative)
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DIC (rare complication associated with prostate cancer)
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Positioning: lithotomy with nerve injury; hemodynamic & respiratory effects of trendelenberg position
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Choice of anesthetic: GA or spinal
Goals & Conflicts
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Optimization of co-existing diseases
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Prevention or early recognition of TURP syndrome
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Attention to blood loss & appropriate replacement
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Conflict: preference for neuraxial technique to monitor CNS symptoms vs. any contraindications to neuraxial
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Problems in PAR include: post-op delirium, hypotension, respiratory distress (need to consider comorbidities)
TURP Syndrome
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Presentation: due to fluid overload & hyponatremia:
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Classic triad: hypertension, bradycardia, & mental status changes
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Pulmonary: pulmonary edema, ↑ JVP
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Cardiovascular: arrhythmias, hypertension
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CNS: pupillary reflex sluggish or absent with glycine toxicity but intact with cerebral edema
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Prevention:
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Appropriate irrigation agent, minimize resection time, hemostasis, avoid high irrigating pressures (limit bag height to 30-40cm, frequent drainage), avoid hypotonic IV fluids, check electrolytes in patients with renal failure (metabolic abnormalities, hyponatremia)
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Treatment:
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Inform surgeon to terminate procedure ASAP
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Oxygenation & circulatory support
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Consider invasive monitoring if hemodynamically unstable (arterial line, CVP)
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Blood work (electrolytes, creatinine, glucose, CBC, ABG)
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12 lead ECG
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Correction of hyponatremia:
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Near-normal serum osmolality & asymptomatic: no interventions to correct serum sodium are recommended even in the presence of hyponatremia
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Mild symptoms (serum Na > 120 mEq/L): fluid restriction & loop diuretic (furosemide 40-120 mg)
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Symptomatic, life-threatening hypoosmolality & serum Na < 120 mEq/L (rare with modern techniques) can be treated with hypertonic saline (rarely necessary):
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Start @ 100cc bolus & assess for resolution of symptoms or Na > 120 mEq/L
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Can give 2 more boluses
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Start at rate of 50-100 cc/h (do not exceed correction of > 1.5 mEq/L/h because rapid correction of serum sodium is associated with central pontine myelinolysis (osmotic demyelination syndrome) & cerebral edema
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Diuresis with furosemide & fluid restriction:
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Stop 3% saline once symptoms subside or serum Na > 120 mEq/L: treat remaining hyponatremia with diuresis & normal saline or fluid restriction
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Seizure treatment as necessary
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Transfer to ICU for ongoing care in severe cases
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q1h blood work (Na, K)
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Frequent CNS assessment
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