| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
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| RAR | rapidly adapting receptor; rat insulin receptor; retinoic acid receptor; right arm reclining; right ... |
| RB | radiation burn; rating board; rebreathing; reticulate body; retinoblastoma; right bronchus; right bu... |
| RBA | relative binding affinity; rescue breathing apparatus; right basilar artery; right brachial artery; ... |
| RCA | red cell agglutination; relative chemotactic activity; renal cell carcinoma; right carotid artery; r... |
| right-handed | 1. Using the right hand habitually, or more easily or skillful than the left. 2. Having the same direction or course as the movement of the hands of a watch seen in front; said of the motion of a revolving object looked at from a given direction. 3. <marine biology> Having the whorls rising from left to right; dextral; said of spiral shells. Synonym: dextral, dextromanual. Source: Websters Dictionary (21 Jun 2000) |
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| right heart | The right atrium and right ventricle. (05 Mar 2000) |
| right heart bypass | Introduction of a circuit shunting blood from the venae cavae around the right atrium and ventricle and directly into the pulmonary artery. (05 Mar 2000) |
| right-hearted | Having a right heart or disposition. Right"-heartedness. Source: Websters Dictionary (01 Mar 1998) |
| right hepatic artery | <anatomy, artery> Right branch of proper hepatic artery; terminal branch of proper hepatic artery supplying right lobe of liver; branch: cystic artery. Synonym: ramus dexter arteriae hepaticae propriae, right branch of proper hepatic artery. (05 Mar 2000) |
| right hepatic veins | Veins draining much of the right lobe of the liver (posterior segments [VI & VII] and part of the inferior anterior segment [V]) which merge to form a single or sometimes double trunk, draining into the right side of the suprahepatic portion of the inferior vena cava (between the superior surface of the liver and the diaphragm); when single, it is the largest vein of the liver. Synonym: venae hepaticae dextrae. (05 Mar 2000) |
| right inferior pulmonary vein | <anatomy, vein> The vein returning oxygenated blood from the inferior lobe of the right lung to the left atrium. Synonym: vena pulmonalis inferior dextra. (05 Mar 2000) |
| right interlobar pulmonary artery | <radiology> Upper limit of normal: 15 mm (12 Dec 1998) |
| right lobe | The right subdivision of several glands, e.g., prostate, thyroid, thymus. Synonym: lobus dexter. (05 Mar 2000) |
| right lobe of liver | The largest lobe of the liver, separated from the left lobe above and in front by the falciform ligament and from the caudate and quadrate lobes by the sulcus for the vena cava and the fossa for the gallbladder; it contains two segments, anterior and posterior. Synonym: lobus hepatis dexter. (05 Mar 2000) |
| right lumbar lymph nodes | The chain of lymph nodes associated with the inferior vena cava; it is divided into three groups: nodi lymphatici cavales laterales on the right of the inferior vena cava; nodi lymphatici precavales, in front of the inferior vena cava; nodi lymphatici postcavales, under nodus lymphaticus, behind the inferior vena cava. Synonym: nodi lymphatici lumbales dextri, lumbar lymph nodes. (05 Mar 2000) |
| right lung segments | <radiology> Upper lobe, apical, posterior, anterior, middle lobe, lateral, medial, lower lobe, superior, medial basal, posterior basal, lateral basal, anterior basal (12 Dec 1998) |
| right main bronchus | It arises at the bifurcation of the trachea and enters the hilum of the right lung, giving off the superior lobe bronchus and continuing downward to give off the middle and inferior lobe bronchi. It is shorter, of greater caliber, and more nearly-vertical than the left main bronchus, thus, aspirated objects more frequently lodge on the right side. Synonym: bronchus principalis dexter. (05 Mar 2000) |
| right margin of heart | The border between the sternocostal and diaphragmatic surfaces of the heart; it is fairly well defined in fixed hearts but is rounded and indefinite in the living heart. Synonym: margo dexter cordis, right margin of heart. (05 Mar 2000) |
| right middle lobe syndrome | <radiology> Controversial, associated with asthma, cough, wheezing, recurrent pneumonia, XR findings: total or partial RML atelectasis, with or without bronchial narrowing (12 Dec 1998) |