||It has been suggested that Pulmonary wedge pressure be merged into this article. (Discuss) Proposed since November 2013.|
|Artery: Pulmonary artery|
|Latin||truncus pulmonalis, arteria pulmonalis|
In the human heart, the pulmonary trunk (pulmonary artery or main pulmonary artery) begins at the base of the right ventricle. It is short and wide—approximately 5 centimetres (2.0 in) in length and 3 centimetres (1.2 in) in diameter. It then branches into two pulmonary arteries (left and right), which deliver deoxygenated blood to the corresponding lung.
|This section requires expansion. (November 2013)|
Originates from the truncus arteriosus (as does the aorta).
The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. The blood here passes through capillaries adjacent to alveoli and becomes oxygenated as part of the process of respiration.
Pulmonary artery pressure
|Central venous pressure||3–8|
|Right ventricular pressure||systolic||15–30|
|Pulmonary artery pressure||systolic||15–30|
|Left ventricular pressure||systolic||100–140|
The pulmonary artery pressure (PA pressure) is a measure of the blood pressure found in the pulmonary artery. This is measured by inserting a catheter into the pulmonary artery. :190–191 The mean pressure is typically 9 - 18 mmHg, and the wedge pressure measured in the left atrium may be 6-12mmHg. The wedge pressure may be elevated in left heart failure,:190–191 mitral valve stenosis, and other conditions, such as sickle cell disease.
The pulmonary artery is relevant in a number of clinical states. Pulmonary hypertension is used to describe an increase in the pressure of the pulmonary artery, and may be defined as a mean pulmonary artery pressure of greater than 25mmHg.:720 This may occur as a result of heart problems such as heart failure, lung or airway disease such as COPD or scleroderma, or thromboembolic disease such as pulmonary embolism or emboli seen in sickle cell anaemia.:720–721
Pulmonary embolism refers to an embolus that lodges in the pulmonary circulation. This may arise from a deep venous thrombosis, especially after a period of immobility. A pulmonary embolus is a common cause of death in patients with cancer and stroke.:720–721 A large pulmonary embolus affecting the pulmonary trunk is called a saddle embolus.
- Chronic obstructive lung disease
- Pulmonary hypertension
- Thromboembolic disease
- Pulmonary artery sling
- Pulmonary circulation
- Rasmussen's aneurysm
- 53805116 at GPnotebook
- pulmonary+trunk at eMedicine Dictionary
- Anatomy photo:20:01-0106 at the SUNY Downstate Medical Center - "Heart: The Pericardial sac and Great vessels"
- Anatomy photo:20:07-0105 at the SUNY Downstate Medical Center - "Heart: Openings of Great Vessels into the Pericardial Sac"
- Anatomy figure: 19:05-06 at Human Anatomy Online, SUNY Downstate Medical Center - "Mediastinal surface of the right lung."
- Anatomy figure: 19:06-02 at Human Anatomy Online, SUNY Downstate Medical Center - "Mediastinal surface of the left lung."
- Histology image: 13802loa - Histology Learning System at Boston University
- Table 30-1 in: Trudie A Goers; Washington University School of Medicine Department of Surgery; Klingensmith, Mary E; Li Ern Chen; Sean C Glasgow (2008). The Washington manual of surgery. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. ISBN 0-7817-7447-0.
- Davidson's principles and practice of medicine. (21st ed. ed.). Edinburgh: Churchill Livingstone/Elsevier. 2010. ISBN 978-0-7020-3084-0.
- Edwards Lifesciences LLC > Normal Hemodynamic Parameters – Adult 2009
- Pashankar FD, Carbonella J, Bazzy-Asaad A, Friedman A (April 2008). "Prevalence and risk factors of elevated pulmonary artery pressures in children with sickle cell disease". Pediatrics 121 (4): 777–82. doi:10.1542/peds.2007-0730. PMID 18381543.