| arch of cricoid cartilage | The narrow part of the cartilage that encircles the air passage anterior to the lamina. Synonym: arcus cartilaginis cricoideae. (05 Mar 2000) |
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| arytenoidal articular surface of cricoid | One of two oval facets on the superiorelateral margin of the cricoid lamina for articulation with the arytenoid cartilages. Synonym: facies articularis arytenoidea cricoideae. (05 Mar 2000) |
| cricoid | Ring-shaped;denoting the cricoid cartilage. Origin: L. Cricoideus, fr. G. Krikos, a ring, + eidos, form (05 Mar 2000) |
| cricoid cartilage | <anatomy> The lower most of the laryngeal cartilages, may be palpated just below the thyroid prominence Adjacent the cricoid cartilage and the first tracheal ring is the cricothyroid membrane, a site used for rapid emergency airway access (cricothyroidotomy). (13 Nov 1997) |
| thyroidal articular surface of cricoid | One of two small circular facets on the lateral surface of the cricoid cartilage near the inferior margin of the junction of the arch and lamina for articulation with the inferior horns of the thyroid cartilage. Synonym: facies articularis thyroidea cricoideae. (05 Mar 2000) |
| lamina of cricoid cartilage | A quadrate plate forming the posterior part of the cricoid cartilage. It resembles the shield of a signet ring, the arch of the cricoid representing the remainder of the ring. Synonym: lamina cartilaginis cricoideae. (05 Mar 2000) |
| abdominal pressure | Pressure surrounding the bladder; estimated from rectal, gastric, or intraperitoneal pressure. (05 Mar 2000) |
| absolute pressure | Pressure measured with respect to zero pressure. Compare: gauge pressure. (05 Mar 2000) |
| acoustic pressure | In ultrasound, the instantaneous value of the total pressure minus the ambient pressure; unit is pascal (Pa). (05 Mar 2000) |
| air pressure | The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment. (12 Dec 1998) |
| atmospheric pressure | The pressure at any point in an atmosphere due solely to the weight of the atmospheric gases above the point concerned. (12 Dec 1998) |
| back pressure | Pressure exerted upstream in the circulation as a result of obstruction to forward flow, as when congestion in the pulmonary circulation results from stenosis of the mitral valve or failure of the left ventricle. (05 Mar 2000) |
| back-pressure renal atrophy | <radiology> Caliectasis without obstruction, due to repeated episodes of obstruction, gradual loss of renal pyramids (12 Dec 1998) |
| barometric pressure | The absolute pressure of the ambient atmosphere, varying with weather, altitude, etc.; expressed in millibars (meteorology) or mm Hg or torr (respiratory physiology); at sea level, one atmosphere (atm, 760 mm Hg or torr) is equivalent to: 14.69595 lb/sq in, 1013.25 millibars, 1013.25 × 106 dynes/cm2, and, in SI units, 101,325 pascals (Pa). Synonym: atmospheric pressure. (05 Mar 2000) |
| bile duct pressure | <radiology> Normal: 15-20 cm H2O (12 Dec 1998) |