PTAN stands for Provider Transaction Access Number (medicare reimbursements). Suggest new definition. This definition appears frequently and is found in the following Acronym Finder categories: 1  Military and Government. 2  Science, medicine, engineering, etc.
Adrenaline also makes the blood vessels dilate in order to improve blood flow and oxygen delivery in case the body has to suddenly flee a dangerous situation. The veins in the face, as well as in the stomach lining and throughout the rest of the body, then have more blood than normal flowing through them, and they appear red. More about blushing: A surgery known as endothoracic sympathectomy can potentially eliminate blushing by snipping the small nerves located in the spine that trigger the response.
the vomiting of blood. The appearance of the vomit depends on the amount and character of the gastric contents at the time blood is vomited and on the length of time the blood has been in the stomach. Gastric acids change bright red blood to a brownish color and the vomit is often described as âcoffee-groundâ in color. Bright red blood in the vomit indicates a fresh hemorrhage and little contact of the blood with gastric juices. The most common causes of hematemesis are peptic ulcer, gastritis, esophageal varices or lesions, and cancer of the stomach.