TURP Syndrome Symptoms and Clinical Presentation

The clinical presentation of Transurethral resection of the prostate (TURP) syndrome can be diverse and varies in severity depending on the volume and rate of irrigating fluid absorbed. Symptoms can manifest during or immediately after the procedure and primarily involve the central nervous system (CNS) and cardiovascular system. The onset of symptoms can be abrupt, and they may range from mild to life-threatening.

CNS Symptoms

In the early stages of TURP syndrome, CNS symptoms often present as apprehension and confusion. Patients may exhibit anxiety, disorientation, and restlessness, which can be easily overlooked, especially under sedation or general anesthesia. Visual disturbances are also common, with patients reporting symptoms such as blurred vision, dimming, or even complete temporary blindness. These visual disturbances are primarily attributed to the absorption of glycine, an inhibitory neurotransmitter that affects retinal function. Glycine, used as an irrigating fluid during TURP, can accumulate in the body and cause neurotoxic effects, particularly in the retina, leading to these visual changes.

As TURP syndrome progresses, more severe CNS symptoms may emerge. Nausea and vomiting are common, likely resulting from both hyponatremia and elevated glycine metabolites. As the condition worsens, patients may experience altered consciousness, ranging from stupor to generalized seizures and even coma. The severity of these neurological disturbances typically correlates with the degree of hyponatremia and glycine toxicity, often exacerbated by cerebral edema. In severe cases, prolonged CNS disturbances such as seizures and coma can occur, underscoring the importance of early detection and intervention to prevent irreversible damage.

Cardiovascular Symptoms

Cardiovascular symptoms in TURP syndrome often begin with bradycardia, which is commonly accompanied by hypertension due to an increase in central venous pressure. These initial changes in cardiovascular function may occur early in the procedure and can serve as important warning signs of fluid overload. Electrocardiographic changes, such as widened QRS complexes and elevated ST segments, may also become evident as sodium levels decline due to the absorption of hypotonic irrigating fluids. These changes indicate an increasing disturbance in the electrical activity of the heart, which is directly linked to the severity of the hyponatremia.

As TURP syndrome advances, cardiovascular instability can worsen, leading to life-threatening complications. Severe cases may progress to arrhythmias such as ventricular tachycardia or fibrillation, which significantly increase the risk of cardiovascular collapse. This instability is a result of both fluid overload and severe hyponatremia, which disrupts the normal balance of electrolytes in the heart. If untreated, these arrhythmias can escalate, resulting in cardiovascular collapse, which is potentially fatal without immediate intervention. Therefore, continuous monitoring and prompt management of cardiovascular symptoms are crucial in preventing life-threatening complications during TURP procedures.

Hyponatremia

Hyponatremia is one of the most critical components of TURP syndrome and results from the absorption of large volumes of hypotonic irrigating fluid, leading to a dilutional effect on serum sodium levels. The degree of hyponatremia is often a direct indicator of the volume of fluid absorbed. A decrease in serum sodium concentration below 120 mmol/L is considered severe and is often associated with the most serious neurological symptoms, such as seizures and coma.

The rapid onset of hyponatremia leads to water shifting from the extracellular space into cells, including brain cells, causing cellular swelling and cerebral edema. This results in increased intracranial pressure, which manifests as CNS symptoms like confusion, seizures, and coma. The rate at which hyponatremia develops plays a crucial role in determining the severity of symptoms, as rapid decreases in sodium levels are more likely to cause severe symptoms compared to chronic hyponatremia, where the brain has time to adapt.

Fluid Overload

Fluid overload occurs when the body absorbs large volumes of irrigating fluid, leading to an increase in intravascular volume. This overload can cause a variety of complications, including increased central venous pressure, hypertension, and peripheral edema. Fluid overload can also lead to pulmonary edema, which manifests as shortness of breath, hypoxemia, and respiratory distress. In severe cases, fluid overload contributes to cardiovascular collapse and multi-organ dysfunction.

The body’s ability to manage the absorbed fluid depends on several factors, including renal function and the duration of the surgical procedure. In cases of massive and rapid fluid absorption, the kidneys may be overwhelmed, leading to the retention of excess fluid and exacerbation of symptoms.

Cardiovascular Complications

Cardiovascular complications in Transurethral resection of the prostate (TURP) syndrome primarily stem from the combination of hyponatremia, fluid overload, and direct effects of the absorbed solutes. The increased intravascular volume leads to elevated central venous pressure, which can cause hypertension, bradycardia, and electrocardiographic changes. If the sodium concentration drops significantly, the heart may be prone to arrhythmias such as ventricular tachycardia or fibrillation. In severe cases, this can lead to cardiovascular collapse and death if not promptly treated.

The cardiovascular complications of TURP syndrome may be further exacerbated by metabolic disturbances related to the absorbed solutes, particularly glycine and its metabolite ammonia. Elevated ammonia levels can depress cardiac function, while glycine itself has been associated with hypotension and bradycardia.