| 释义 |
mediastinumenUK
me·di·as·ti·num M0189900 (mē′dē-ə-stī′nəm)n. pl. me·di·as·ti·na (-nə) The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.
[New Latin mediastīnum, from neuter of Medieval Latin mediastīnus, medial, middle, from Latin, servant employed on general tasks (Medieval Latin anatomical sense probably influenced by Latin intestīnum, intestine), from medius, middle; see medhyo- in Indo-European roots.]
me′di·as·ti′nal (-nəl) adj.mediastinum (ˌmiːdɪəˈstaɪnəm) n, pl -na (-nə) 1. (Anatomy) a membrane between two parts of an organ or cavity such as the pleural tissue between the two lungs2. (Anatomy) the part of the thoracic cavity that lies between the lungs, containing the heart, trachea, etc[C16: from medical Latin, neuter of Medieval Latin mediastīnus median, from Latin: low grade of servant, from medius mean] ˌmediasˈtinal adjme•di•as•ti•num (ˌmi di æˈstaɪ nəm)
n., pl. -na (-nə) 1. a median septum or partition between two parts of an organ or paired cavities of the body. 2. the area in the chest that lies between the lungs, is bounded by the sternum, the spinal column, and the diaphragm, and contains the heart, esophagus, trachea, and other thoracic structures. [1535–45; < New Latin < Medieval Latin mediastīnus middle class, derivative of Latin medius mid1] me`di•as•ti′nal, adj. Thesaurus| Noun | 1. |  mediastinum - the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymusbodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the bodychest cavity, thoracic cavity - the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart |
TranslationsMediastinumenUK
mediastinum[‚mē·dē·ə′stī·nəm] (anatomy) A partition separating adjacent parts. The space in the middle of the chest between the two pleurae. Mediastinum in man, an anatomic area in the thoracic cavity, bounded anteriorly by the sternum, posteriorly by the thoracic region of the spine, laterally by the pleurae and lung surfaces, and inferiorly by the diaphragm; an arbitrary horizontal line drawn across the upper edge of the sternum is considered to be the upper boundary. A distinction is made between anterior and posterior mediastinal regions, which are divided by the roots of the lungs. The anterior mediastinum contains the heart and heart sac (the pericardium), the ascending aorta and its arch (including the arteries issuing from them), the pulmonary trunk, the venae cavae, the pulmonary veins, and the phrenic nerves. The posterior mediastinum contains the thoracic portion of the descending aorta and its branches, the esophagus, the azygos and hemiazygos veins, the thoracic lymphatic duct, and the vagus and splanchnic nerves. Closed injuries of mediastinal organs occur in cases of contusions, compression of the chest, and sternal fractures. Upon injury to the lungs or bronchi and the accumulation of air, pneumomediastinum and the compression of mediastinal organs may occur. Open mediastinal injuries are associated with injuries of the lungs and often of the organs of the abdominal cavity. Mediastinal injuries are treated surgically. The most common diseases of the mediastinum include mediastinitis, substernal extension of an enlarged thyroid gland, cysts and tumors of mediastinal organs, and lesions of mediastinal lymph nodes, for example, in cases of lymphogranulomatosis. REFERENCESPetrovskii, B. V. Khirurgiia sredosteniia. Moscow, 1960.
Elizarovskii, S. I., and G. I. Kondrat’ev. Khirurgicheskaia anatomiia sredosteniia (atlas). Moscow, 1961.
Gol’bert, Z. V., and G. A. Lavnikova. Opukholi i kistv sredosteniia. Moscow, 1965. ’mediastinumenUK
mediastinum [me″de-ah-sti´num] (L.) 1. a median septum or partition.2. the mass of tissues and organs separating the sternum in front and the vertebral column behind, containing the heart and its large vessels, trachea, esophagus, thymus, lymph nodes, and other structures and tissues. It is divided into anterior, middle, posterior, and superior regions.mediastinum tes´tis a partial septum of the testis formed near its posterior border by a continuation of the tunica albuginea.me·di·as·ti·num (me'dē-as-tī'nŭm), 1. A septum between two parts of an organ or a cavity. 2. The median partition of the thoracic cavity, covered by the mediastinal part of the parietal pleura and containing all the thoracic viscera and structures except the lungs. It is divided arbitrarily into two major divisions: the superior mediastinum [TA] (mediastinum superus [TA]), which lies directly superior to a horizontal plane intersecting the sternal angle and approximately the T4-5 intervertebral disc, and the inferior mediastinum [TA] (mediastinum inferius [TA]) inferior to that plane; the latter is, in turn, subdivided in three parts: a middle mediastinum [TA] (mediastinum medium [TA]), which is coterminus with the pericardial sac containing the heart: a nearly potential anterior mediastinum [TA] (mediastinum anterius [TA]) lying in front: and a posterior mediastinum [TA] (mediastinum posterius [TA]) behind, containing the esophagus, descending aorta, and thoracic duct. Synonym(s): interpleural space, interpulmonary septum, mediastinal space, septum mediastinale [Mod. L. a middle septum, fr. Mediev. L. mediastinus, medial, fr. L. mediastinus, a lower servant, fr. medius, middle] mediastinum (mē′dē-ə-stī′nəm)n. pl. mediasti·na (-nə) The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.
me′di·as·ti′nal (-nəl) adj.mediastinum The region of the thorax bounded by the lungs, which includes the heart and regional vessels, trachea, oesophagus, bronchi, lymph nodes.
Mediastinal regions: Tissues and tumours
• Superior: Lymphoid, thymic, thyroid, parathyroid.
• Anterior: Thymic, germ cell, lymphoid, thyroid, parathyroid.
• Middle: Trachea and main bronchi (bronchogenic cyst), pericardial, lymphoid.
• Posterior: Sympathetic ganglia, paraganglia (neurogenic tumours), lymphoid, oesophageal, vascular.me·di·as·ti·num (me'dē-ă-stī'nŭm) [TA] 1. A septum between two parts of an organ or a cavity. 2. The median partition of the thoracic cavity, covered by the mediastinal part of the parietal pleura and containing all the thoracic viscera and structures except the lungs. It is divided arbitrarily into two major divisions: a superior mediastinum (mediastinum superius [TA]), which lies directly superior to a horizontal plane intersecting the sternal angle and approximately the T4-5 intervertebral disc, and an inferior mediastinum (mediastinum inferius [TA]) inferior to that plane; the latter is, in turn, subdivided in three parts: a middle mediastinum (mediastinum medium [TA]), which is coterminous with the pericardial sac containing the heart, a nearly potential anterior mediastinum (mediastinum anterius [TA]) lying in front, and a posterior mediastinum (mediastinum posterius [TA]) behind, containing the esophagus, descending aorta, and thoracic duct.
Synonym(s): interpleural space, mediastinal space. mediastinum The central compartment of the chest, flanked on either side by the lungs, and containing the heart, the origins of the great blood vessels, the TRACHEA and the main BRONCHI, the OESOPHAGUS and many lymph nodes.mediastinum the space in the chest of mammals containing the HEART, TRACHEA and OESOPHAGUS.MediastinumThe area between the lungs, bounded by the spine, breastbone, and diaphragm.Mentioned in: Lung Biopsy, Pneumothoraxme·di·as·ti·num (me'dē-ă-stī'nŭm) [TA] 1. A septum between two parts of an organ or a cavity. 2. The median partition of the thoracic cavity, covered by the mediastinal part of the parietal pleura and containing all the thoracic viscera and structures except the lungs. mediastinumenUK
Words related to mediastinumnoun the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymusRelated Words- bodily cavity
- cavum
- cavity
- chest cavity
- thoracic cavity
|