Abstract:
:A video-laryngoscopic method, implemented with an algorithm for the correction of the deformation inherent in the endoscope optical system, has been used to measure the dorsoventral diameter (Drg) and the cross-sectional area (CSArg) of the rima glottidis in five healthy workhorses during conscious breathing at rest. Simultaneous recording of the respiratory airflow was also obtained in two horses. Drg measured 82.7 +/- 4.5 mm (mean +/- S.D.) independently of the respiratory phase, and did not differ from the measurement in post-mortem anatomical specimens of the same horses. CSArg ranged from 1130 +/- 117 mm2 (mean +/- S.D.) during the inspiratory phase to 640 +/- 242 mm2 during the expiratory phase; being always narrower than tracheal cross-sectional area, which was 1616 +/- 224 mm2, as determined from anatomical specimens. Both inspiratory and expiratory airflow waves displayed a biphasic pattern. Maximal laryngeal opening occurred in phase with the second inspiratory peak, while during expiration CSArg attained a minimum value during the first expiratory peak which was significantly smaller (P < 0.01) than the area subsequently maintained during the rest of the expiratiory phase. These quantitative measurements of equine laryngeal movements substantiate the important role played by the larynx in regulating upper airway respiratory resistance and the expiratory airflow pattern at rest.
journal_name
Exp Physioljournal_title
Experimental physiologyauthors
Lafortuna CL,Albertini M,Ferrucci F,Zucca E,Braghieri M,Clement MG,Saibene Fsubject
Has Abstractpub_date
1999-07-01 00:00:00pages
739-46issue
4eissn
0958-0670issn
1469-445Xjournal_volume
84pub_type
杂志文章abstract:NEW FINDINGS:What is the central question of this study? We examined whether the macrophage-synthesized antioxidant 7,8-dihydroneopterin was elevated in Duchenne muscular dystrophy (DMD) patients. We then examined whether 7,8-dihydroneopterin could protect dystrophic skeletal mouse muscle from eccentric contraction-ind...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP087031
更新日期:2018-07-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Experimental physiology
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doi:10.1113/expphysiol.1990.sp003393
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abstract::The effect of mechanical loading on the negative inotropic effect of acidosis in isolated rat ventricular myocytes was investigated. The mechanical loading of the myocytes was changed by attaching carbon fibres to the ends of the cell. To monitor intracellular Ca2+ and Na+ concentrations, cells were loaded with fluore...
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pub_type: 杂志文章
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更新日期:2017-04-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章,随机对照试验
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更新日期:2007-01-01 00:00:00
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更新日期:2005-05-01 00:00:00
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journal_title:Experimental physiology
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doi:10.1113/EP087307
更新日期:2019-01-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2006-03-01 00:00:00
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journal_title:Experimental physiology
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doi:10.1113/EP086655
更新日期:2018-04-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP085273
更新日期:2015-10-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
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journal_title:Experimental physiology
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更新日期:2017-03-01 00:00:00
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journal_title:Experimental physiology
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更新日期:2020-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1113/expphysiol.2014.083139
更新日期:2015-02-01 00:00:00
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doi:10.1113/EP085420
更新日期:2016-03-01 00:00:00
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journal_title:Experimental physiology
pub_type: 临床试验,杂志文章
doi:
更新日期:2000-01-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8602173
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1997.sp004043
更新日期:1997-05-01 00:00:00