| pneumatic space | Any one of the paranasal sinuses. (05 Mar 2000) |
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| pneumatic | 1. Relating to air or gas, or to a structure filled with air. 2. Relating to respiration. Origin: G. Pneumatikos (05 Mar 2000) |
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| pneumatic antishock garment | An inflatable suit used to apply pressure to the peripheral circulation, thus reducing blood flow and fluid exudation into tissues, to maintain central blood flow in the presence of shock. Synonym: military antishock trousers. (05 Mar 2000) |
| pneumatic bone | A bone that is hollow or contains many air cells, such as the mastoid process of the temporal bone. Synonym: os pneumaticum, hollow bone. (05 Mar 2000) |
| pneumatic larynx | A device that uses air to produce sound to help a laryngectomee talk. (12 Dec 1998) |
| pneumatic retinopexy | A retinal detachment repair in which the retina is held in place by an expandable gas. Synonym: pneumatic retinopexy. (05 Mar 2000) |
| pneumatic tire injury | Separation of the skin and subcutaneous tissue from the underlying fascia, classically occurring when an extremity is crushed and rolled over by the tire of a vehicle but may be incurred through other mechanisms that produce shear forces; may occur particularly in cases of obesity. (05 Mar 2000) |
| pneumatic tonometer | A recording applanation tonometer operated by compressed gas. (05 Mar 2000) |
| alveolar dead space | The difference between physiologic dead space and anatomical dead space; it represents that part of the physiologic dead space resulting from ventilation of relatively underperfused or nonperfused alveoli; it differs specifically in being placed so as to fill and empty in parallel with functional alveoli, rather than being interposed in the conducting tubes between functional alveoli and the external environment. (05 Mar 2000) |
| anatomical dead space | The volume of the conducting airways from the external environment (at the nose and mouth) down to the level at which inspired gas exchanges oxygen and carbon dioxide with pulmonary capillary blood; formerly presumed to extend down to the beginning of alveolar epithelium in the respiratory bronchioles, but more recent evidence indicates that effective gas exchange extends some distance up the thicker-walled conducting airways because of rapid longitudinal mixing. Compare: alveolar dead space, physiologic dead space. Synonym: anatomical airway. (05 Mar 2000) |
| antecubital space | The fossa in front of the elbow, bounded laterally and medially by the humeral origins of the extensors and flexors of the forearm, respectively, and superiorly by an imaginary line connecting the humeral condyles. Synonym: fossa cubitalis, antecubital space, chelidon, triangle of elbow. (05 Mar 2000) |
| anterior clear space | On lateral chest radiographs, the region dorsal to the sternum and ventral to the ascending aorta. Synonym: anterior clear space. (05 Mar 2000) |
| apical space | The space between the alveolar wall and the apex of the root of a tooth where an alveolar abscess usually has its origin. (05 Mar 2000) |
| axillary space | <anatomy> The underarm area. (16 Dec 1997) |
| Berger's space | The space between the patellar fossa of the vitreous and the lens. (05 Mar 2000) |
| Bogros' space | A triangular space between the peritoneum and the transversalis fascia, at the lower angle of which is the inguinal ligament; it contains the lower portion of the external iliac artery. Synonym: Bogros' space, spatium retroinguinale. (05 Mar 2000) |