| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
|---|---|
| PAo | airway opening pressure; ascending aortic pressure; pulmonary artery occlusion pressure |
| Po | opening pressure |
| To | tricuspid opening |
| VO | verbal order; volume overload; voluntary opening |
| thoracic cage | The skeleton of the thorax consisting of the thoracic vertebrae, ribs, costal cartilages, and sternum. Synonym: compages thoracis, skeleton thoracicus. (05 Mar 2000) |
|---|---|
| thoracic cardiac branches of vagus nerve | <anatomy, nerve> Branches of vagus nerve to the cardiac plexus which branch from the vagi at thoracic levels, conducting presynpatic parasympathetic fibres to, and reflex afferent fibres from, the cardiac plexus. Synonym: rami cardiaci thoracici nervi vagi. (05 Mar 2000) |
| thoracic cardiac nerves | Part of the cardiopulmonary splanchnic nerves from the second to fifth segments of the thoracic sympathetic trunk that pass medially and anteriorly to enter the cardiac plexus; they convey postsynaptic sympathetic fibres to, and visceral afferent (pain) fibres from, the heart. Synonym: nervi cardiaci thoracici, upper thoracic splanchnic nerves. (05 Mar 2000) |
| thoracic cavity | The space within the thoracic walls, bounded below by the diaphragm and above by the neck. Synonym: cavitas thoracis, cavum thoracis. (05 Mar 2000) |
| thoracic choke | Obstruction by a foreign body in the thoracic portion of the oesophagus of an animal. (05 Mar 2000) |
| thoracic compliance | That portion of total ventilatory compliance ascribable to compliance of the thoracic cage. (05 Mar 2000) |
| thoracic duct | <anatomy> The major efferent lymph duct into which lymph from most of the peripheral lymph nodes drains. Recirculating lymphocytes that have left the circulation in the lymph node return to the blood through the thoracic duct. (18 Nov 1997) |
| thoracic fistula | A fistula, either blind or complete, opening on the wall of the thorax or abdomen. Synonym: thoracic fistula. (05 Mar 2000) |
| thoracic ganglia | Ganglia, 11 or 12 on either side, at the level of the head of each rib, constituting with the interganglionic rami the thoracic portion of the sympathetic trunk. Synonym: ganglia thoracica. (05 Mar 2000) |
| thoracic girdle | shoulder girdle |
| thoracic glands | <entomology> Insect structures that originate from the ectoderm of the ventrocaudal part of the head and serve as a source of ecdysone. Synonym: peritracheal glands, prothoracic glands, thoracic glands, ventral glands. (05 Mar 2000) |
| thoracic goiter | Enlargement of accessory thyroid tissue in the thorax with or without hyperthyroidism. (05 Mar 2000) |
| thoracic index | Anteroposterior diameter of the thorax times 100 divided by the transverse diameter of the thorax. Synonym: chest index. (05 Mar 2000) |
| thoracic injuries | General or unspecified injuries to the chest area. (12 Dec 1998) |
| thoracic interspinales muscles | Often poorly developed or absent muscles between spinous process of thoracic vertebrae; action, extends thoracic vertebrae; nerve supply, dorsal primary rami of thoracic nerves. Synonym: musculus interspinalis thoracis, thoracic interspinal muscle. (05 Mar 2000) |