Aspirate
Phlebotomy, venipuncture
Antigen is the medical term meaning foreign substance.
A pathogen is a foreign body, bacteria, or virus.
Embolism
"Antibody" is the medical term meaning immunity protein. When your body is presented with a foreign protein, the immune system makes antibodies against that protein.
A foreign substance is a substance that doesn't belong somewhere. A piece of glass or splinter is a foreign substance that people get in their body.
Venotomy, venesection, phlebotomy or venipuncture is piercing of a vein to withdraw blood. Venous cut-down is incision of a vein in an emergency to insert a tube to give fluids or other medications.
Health professionals usually refer to dirt in the eye as an ocular foreign body.
I think you are trying to describe a Lumbar Puncture, which is performed in the lower (lumbar) region of the spine.
Answer is Pulmonary Embolism.
Cardiac Catheterization
A trachea plug, often referred to in medical contexts, is a blockage in the trachea, the windpipe that carries air to and from the lungs. This blockage can be caused by various factors, including mucus buildup, foreign objects, or swelling from infections. It can lead to breathing difficulties and requires prompt medical attention to restore airway patency. Treatment may involve suctioning, bronchoscopy, or other interventions to remove the obstruction.