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Diagnostic thoracoscopy is a minimally invasive surgical procedure that allows for direct visualization of the pericardial sac, which is the double-walled structure surrounding the heart. This procedure is typically performed through small incisions made in the chest wall, specifically at the right or left midaxillary line and within the sixth or seventh intercostal space. The thoracoscope, a specialized instrument equipped with a camera and light source, is inserted to provide a clear view of the pericardial sac. During the procedure, the surgeon examines the pericardial sac for any abnormalities, such as fluid accumulation, lesions, or other pathological changes. If necessary, an incision is made in the pericardial sac to aspirate any fluid present, which is then sent for laboratory analysis to determine its composition and potential underlying causes. The procedure also includes a thorough inspection of the cardiac chambers, epicardium, and pericardium for any lesions or implants that may indicate disease. In some cases, photographs may be taken to document findings. It is important to note that if biopsies of the pericardium or epicardium are required, the appropriate code to use is 32604, as this code specifically pertains to procedures involving tissue sampling.
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