| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
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| IRV | inferior radicular vein; inspiratory reserve volume; inverse ratio ventilation |
| ITA | inferior temporal artery; internal thoracic artery; International Tuberculosis Association |
| ITQ | inferior temporal quadrant |
| ITV | inferior temporal vein |
| transverse ligament of pelvis | <anatomy> The thickened anterior border of the urogenital diaphragm, formed by the fusion of its two fascial layers. Synonym: ligamentum transversum perinei, Krause's ligament, ligamentum transversum pelvis, transverse ligament of pelvis, transverse ligament of perineum. (05 Mar 2000) |
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| transverse oval pelvis | A pelvis in which the transverse diameter is more than 1 cm longer but less than 3 cm longer than the anteroposterior diameter. Synonym: transverse oval pelvis. (05 Mar 2000) |
| true pelvis | The cavity of the pelvis below the brim or superior aperture. Synonym: pelvis minor, pelvis vera, small pelvis, true pelvis. (05 Mar 2000) |
| juvenile pelvis | A pelvis justo minor in which the bones are slender. (05 Mar 2000) |
| false pelvis | The expanded portion of the pelvis above the brim. Synonym: pelvis major, false pelvis, large pelvis, pelvis spuria. (05 Mar 2000) |
| fascia diaphragmatis pelvis superior | The fascia on the superior aspect of the levator ani and coccygeus muscles. Synonym: fascia diaphragmatis pelvis superior. (05 Mar 2000) |
| fascia pelvis | It includes parietal and visceral components: fascia pelvis parietalis and fascia pelvis visceralis. Synonym: fascia pelvis. (05 Mar 2000) |
| fascia pelvis parietalis | Including the obturator fascia, covers the muscles that pass from the interior of the pelvis to the thigh. Synonym: fascia pelvis parietalis. (05 Mar 2000) |
| fascia pelvis visceralis | Covers the pelvic organs and surrounds vessels and nerves in the subperitoneal space. Synonym: endopelvic fascia, fascia pelvis visceralis. (05 Mar 2000) |
| kidney pelvis | The expansion from the upper end of the ureter into which the calices of the kidney (kidney calices) open. (12 Dec 1998) |
| ureteric pelvis | <anatomy> The area at the centre of the kidney. Urine collects here and is funneled into the ureter. (12 Dec 1998) |
| kyphoscoliotic pelvis | A pelvis with marked anteroposterior curvature of the spine combined with lateral spinal curvature, usually due to severe rickets. (05 Mar 2000) |
| kyphotic pelvis | Backward curvature of the lumbar spine causing contraction of pelvic measurements. (05 Mar 2000) |
| flat pelvis | A pelvis in which the anteroposterior diameter is uniformly contracted, the sacrum being dislocated forward between the iliac bones. Synonym: pelvis plana. (05 Mar 2000) |
| large pelvis | The expanded portion of the pelvis above the brim. Synonym: pelvis major, false pelvis, large pelvis, pelvis spuria. (05 Mar 2000) |