scholarly journals Poor standardisation of plethysmographic specific airways resistance measurement despite widespread use

2015 ◽  
Vol 46 (6) ◽  
pp. 1811-1814 ◽  
Author(s):  
Paul D. Robinson ◽  
Janet Stocks ◽  
Francois Marchal ◽  
Kim G. Nielsen ◽  
Bruce R. Thompson ◽  
...  
Keyword(s):  
Resistance Measurement ◽  
Airways Resistance

Airway Resistance during Esophageal Phonation

1982 ◽  
Vol 47 (2) ◽  
pp. 194-199 ◽  
Author(s):  
Bernd Weinberg ◽  
Yoshiyuki Horii ◽  
Eric Blom ◽  
Mark Singer
Keyword(s):  
Speech Production ◽  
Airway Resistance ◽  
Voice Restoration ◽  
Esophageal Speech ◽  
Airways Resistance ◽  
Restoration Method

Prosthesis airway resistance calculations were completed for five Blom-Singer prostheses and esophageal source airway resistance estimated were made of five laryngectomized patients using the Singer-Blom voice restoration method. Airway resistance of the Blom-Singer prostheses ranged from 46 to 121 cmH 2 O/LPS, while source airways resistance in these subjects ranged from about 155 to 270 cmH 2 O/LPS. These results revealed that the opposition of the voicing sources used in esophageal speech production to airflow through them is substantial and larger than that established for the normal, laryngeal source. Findings are interpreted to highlight major advantages the Singer-Blom (1980) method of speech/voice restoration has over esophageal speech/voice produced on a conventional basis and to reveal specific reasons for the failure of may laryngectomized patients to develop consistent voice and functionally serviceable speech.

Characterization of a Resistive Path to a Gate Node Using Tunneling Current Measurements

2010 ◽  
Author(s):  
Clifford Howard ◽  
Sam Subramanian ◽  
Kent Erington ◽  
Randall Mulder ◽  
Yuk Tsang ◽  
...  
Keyword(s):  
High Resistance ◽  
Tunneling Current ◽  
Resistance Measurement ◽  
Gate Leakage ◽  
Advanced Technologies

Abstract Advanced technologies with higher gate leakage due to oxide tunneling current enable detection of high resistance faults to gate nodes using a straight forward resistance measurement.

scholarly journals Methacholine causes reflex bronchoconstriction

1999 ◽  
Vol 86 (1) ◽  
pp. 294-297 ◽  
Author(s):  
Elizabeth M. Wagner ◽  
David B. Jacoby
Keyword(s):  
Smooth Muscle ◽  
Airway Smooth Muscle ◽  
Bronchial Artery ◽  
Muscle Tension ◽  
Reflex Response ◽  
Resistance Change ◽  
Bilateral Vagotomy ◽  
Airways Resistance ◽  
Lower Airways

To determine whether methacholine causes vagally mediated reflex constriction of airway smooth muscle, we administered methacholine to sheep either via the bronchial artery or as an aerosol via tracheostomy into the lower airways. We then measured the contraction of an isolated, in situ segment of trachealis smooth muscle and determined the effect of vagotomy on the trachealis response. Administering methacholine to the subcarinal airways via the bronchial artery (0.5–10.0 μg/ml) caused dose-dependent bronchoconstriction and contraction of the tracheal segment. At the highest methacholine concentration delivered, trachealis smooth muscle tension increased an average of 186% over baseline. Aerosolized methacholine (5–7 breaths of 100 mg/ml) increased trachealis tension by 58% and airways resistance by 183%. As the bronchial circulation in the sheep does not supply the trachea, we postulated that the trachealis contraction was caused by a reflex response to methacholine in the lower airways. Bilateral vagotomy essentially eliminated the trachealis response and the airways resistance change after lower airways challenge (either via the bronchial artery or via aerosol) with methacholine. We conclude that 1) methacholine causes a substantial reflex contraction of airway smooth muscle and 2) the assumption may not be valid that a response to methacholine in humans or experimental animals represents solely the direct effect on smooth muscle.

A Drain–Source Connection Technique: Thermal Resistance Measurement Method for GaN HEMTs Using TSEP at High Voltage

2020 ◽  
Vol 67 (12) ◽  
pp. 5454-5459
Author(s):  
Xuan Li ◽  
Shiwei Feng ◽  
Chang Liu ◽  
Yamin Zhang ◽  
Kun Bai ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
High Voltage ◽  
Measurement Method ◽  
Resistance Measurement ◽  
Gan Hemts

scholarly journals Local Resistance Measurement for Degradation of c-Si Heterojunction with Intrinsic Thin Layer (HIT) Solar Modules

2020 ◽  
Author(s):  
Chun-Sheng Jiang ◽  
Dana.B. Sulas-Kern ◽  
Helio R. Moutinho ◽  
Dirk C. Jordan ◽  
Chuanxiao Xiao ◽  
...  
Keyword(s):  
Thin Layer ◽  
Resistance Measurement ◽  
Local Resistance
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