| maximum breathing capacity | The volume of air breathed when an individual breathes as deeply and as quickly as possible for a given time (e.g., 15 sec.). Synonym: maximum breathing capacity. (05 Mar 2000) |
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| maximal | The greatest possible, allowable or appreciable, the reverse of minimal. (18 Nov 1997) |
| maximal dose | <pharmacology> The largest amount of a drug or physical procedure that an adult can take with safety. (05 Mar 2000) |
| maximal expiratory flow rate | <chest medicine, physiology> Measurement of rate of airflow during the first liter expired after the first 200 ml have been exhausted during a forced vital capacity determination. Common abbreviations are MEFR, FEF 202-1200, and fef 0.2-1.2. Acronym: MEFR (21 Jun 2000) |
| maximal expiratory flow-volume curve | <chest medicine> Curves depicting maximal expiratory flow in liters/second at each point of lung inflation (expressed in liters or percentage of forced vital capacity) during a forced vital capacity determination. Common abbreviation is mefv. (12 Dec 1998) |
| maximal Histalog test | A test for measurement of maximal production of gastric acidity or anacidity; it is similar to the histamine test, but uses Histalog (betazole hydrochloride), an analogue of histamine. Synonym: maximal Histalog test. (05 Mar 2000) |
| maximal midexpiratory flow rate | Measurement of rate of airflow over the middle half of a forced vital capacity determination (from the 25 percent level to the 75 percent level). Common abbreviations are mmfr and fef 25%-75%. (12 Dec 1998) |
| maximal stimulus | A stimulus strong enough to evoke a maximal response. (05 Mar 2000) |
| maximal voluntary ventilation | Measure of the maximum amount of air that can be breathed in and blown out over a sustained interval such as 15 or 20 seconds. Common abbreviations are mvv and mbc. (12 Dec 1998) |
| point of maximal impulse | The point on the chest wall at which the maximal cardiac impulse is seen and/or felt. (05 Mar 2000) |
| apneustic breathing | Pauses in the respiratory cycle at full inspiration, caused by damage of the respiratory control centres in the more caudal pons. (05 Mar 2000) |
| ataxic breathing | Completely irregular breathing pattern, with continually variable rate and depth of breathing; results from lesions in the respiratory centres in the brainstem, extending from the dorsomedial medulla caudally to the obex. Synonym: ataxic breathing, Biot's breathing, respiratory ataxia. (05 Mar 2000) |
| Biot's breathing | Completely irregular breathing pattern, with continually variable rate and depth of breathing; results from lesions in the respiratory centres in the brainstem, extending from the dorsomedial medulla caudally to the obex. Synonym: ataxic breathing, Biot's breathing, respiratory ataxia. (05 Mar 2000) |
| Biot's breathing sign | <clinical sign> Irregular periods of apnea alternating with four or five deep breaths; seen with increased intracranial pressure. (05 Mar 2000) |
| breathing | 1. Respiration; the act of inhaling and exhaling air. "Subject to a difficulty of breathing." (Melmoth) 2. Air in gentle motion. 3. Any gentle influence or operation; inspiration; as, the breathings of the Spirit. 4. Aspiration; secret prayer. "Earnest desires and breathings after that blessed state." 5. Exercising; promotion of respiration. "Here is a lady that wants breathing too; And I have heard, you knights of Tyre Are excellent in making ladies trip." (Shak) 6. Utterance; communication or publicity by words. "I am sorry to give breathing to my purpose." (Shak) 7. Breathing place; vent. 8. Stop; pause; delay. "You shake the head at so long a breathing." (Shak) 9. Also, in a wider sense, the sound caused by the friction of the outgoing breath in the throat, mouth, etc, when the glottis is wide open; aspiration; the sound expressed by the letter h. 10. A mark to indicate aspiration or its absence. See Rough breathing, Smooth breathing, below. Breathing place. A pause. "That caesura, or breathing place, in the midst of the verse." . A vent. Breathing time, pause; relaxation. Breathing while, time sufficient for drawing breath; a short time. Rough breathing (spiritus asper) . See Asper, Smooth breathing (spiritus lenis), a mark (') indicating the absence of the sound of h, as in 'ienai (ienai). Source: Websters Dictionary (01 Mar 1998) |