Invasive Procedures
Biopsies: Tissue samples taken for diagnostic examination.
Endoscopy: Internal visualization using a flexible tube with a camera.
Arterial and Venous Catheterization: Insertion of catheters for monitoring and treatment.
Lumbar Puncture: Collection of cerebrospinal fluid for diagnostic purposes.
Thoracentesis: Removal of fluid from the chest cavity for analysis.

Non-Invasive Investigative
Blood Tests: Analysis of blood samples to assess various health markers.
Imaging Studies: Techniques like X-rays, CT scans, and MRIs to visualize internal structures.
Ultrasound: Use of sound waves to create images of internal organs and tissues.
Electrocardiogram (ECG): Recording of the heart’s electrical activity to detect abnormalities.
Spirometry: Measurement of lung function and capacity.