Respiratory muscle fatigue

1989 ◽  
Vol 15 (S1) ◽  
pp. S17-S20 ◽  
Author(s):  
M. Aubier
Keyword(s):  
Muscle Fatigue ◽  
Respiratory Muscle ◽  
Respiratory Muscle Fatigue

THE IMPACT OF RESPIRATORY MUSCLE FATIGUE ON THE QUALITY AND EFFICIENCY OF RESCUE ACTION

2017 ◽  
Vol 27 (80) ◽  
pp. 65-75 ◽  
Author(s):  
Katarzyna Kucia ◽  
Ewa Dybińska ◽  
Tomasz Białkowski ◽  
Tomasz Pałka
Keyword(s):  
Muscle Fatigue ◽  
Respiratory Muscle ◽  
Body Height ◽  
Heart Association ◽  
Recording Instrument ◽  
Respiratory Muscle Fatigue ◽  
Stomach Inflation ◽  
Water Rescue ◽  
The Impact

INTRODUCTION The lifeguard is the person in charge of safety in water environments. After a rescue, it is possible that he has to execute a CPR. The European Resuscitation Council (ERC) as well as theAmerican Heart Association are currently encouraging a quality CPR performance. The lifeguard may be obliged to carry out a CPR during a long period of time as the response of the Emergency Medical Service takes 5–8 min on average and it can even reach 20 min. The normal respiratory muscle effort at maximal swimming intensity requires a significant fraction of cardiac output and causes leg blood flow to fall. The main objective of this paper was to determine respiratory muscle fatigue (RMF) level in swimming with different intensity on quality and efficiency rescu action in the water. MATERIAL AND METHODS The study involved eleven lifeguards male (9) and female (2); age: (24.25±1.5); body height( 176,27±7,88) and body mass (75.81±11,01)form University School of Physical Education, Cracow. Two tests were conducted: the first test involved the execution of 5 min of CPR (rested), and the second one in performing water rescue and subsequent CPR (exhausted) for 5 minutes. The quality of the CPR at rest and at fatigue condition was compared. The recording instrument was the Ambu Defib Trainer W (Wireless).The time and precision of the simulated water rescue was also registered. Two spirometry tests were performed the first test was set before swimming and the second after (exhausted). Maximal respiratory pressures (PImax, PEmax) were evaluated before and directly after swimming in different intensity.The quality of the respiratory muscle fatigue at rest and at fatigue condition was compared. The recording instrument was portable MicroLoop spirometer. RESULTS After e simulated water rescue significantly increase parameters such as: ventilation minute volume rested (3,06±22,10) exhausted (4,23 ±22,10. P < .001); ventilation rate rested (3.60±34.80) exhausted (4,80 ±34.80. P < .001); and stomach inflation rested (2,0±20,47) exhausted (5.80 ±20.47. P < .001). The greatest variation in the results of the respiratory muscle fatigue both before and after swimming with different intensity was observed only in two parameters: maximal ventilation index (MVV) and peak exhaust flow (PEF). CONCLUSIONS The accumulated fatigue during a simulated water rescue performed by lifeguards reduces the quality of compression depth and pause between compressions. The following respiratory parameters were found to have the strongest effect on the swimming: during maximum exercise intensity and FEV 1 (-0.77) rested and FEV 1 (-0.57) exhausted and FVC (-0.79) rested and FVC (-0.70) exhausted.

Respiratory Muscle Fatigue

1991 ◽  
Vol 12 (04) ◽  
pp. 305-321 ◽  
Author(s):  
A. Grassino ◽  
T. Clanton
Keyword(s):  
Muscle Fatigue ◽  
Respiratory Muscle ◽  
Respiratory Muscle Fatigue

Noninvasive measurement of the tension-time index in children with neuromuscular disease

2003 ◽  
Vol 95 (3) ◽  
pp. 931-937 ◽  
Author(s):  
Laura T. Mulreany ◽  
Daniel J. Weiner ◽  
Joseph M. McDonough ◽  
Howard B. Panitch ◽  
Julian L. Allen
Keyword(s):  
Respiratory Failure ◽  
Muscle Fatigue ◽  
Neuromuscular Disease ◽  
Respiratory Muscle ◽  
Forced Expiratory Volume ◽  
Inspiratory Pressure ◽  
Maximal Inspiratory Pressure ◽  
Respiratory Muscle Fatigue ◽  
Time Index ◽  
Tension Time

Respiratory muscle weakness is common in children with neuromuscular disease (NMD). We hypothesized that weakness puts them at risk for respiratory muscle fatigue, a harbinger of chronic respiratory failure. We therefore measured a noninvasive index of respiratory muscle fatigue, the tension-time index of the respiratory muscles (TTmus), in 11 children with NMD and 13 control subjects. Spirometric flow rates and maximal inspiratory pressure were significantly lower in the NMD group than in controls (43 ± 23 vs. 99 ± 21 cmH2O, P < 0.001). The mean TTmus was significantly higher in the NMD group than in controls (0.205 ± 0.117 vs. 0.054 ± 0.021, P < 0.001). The increase in TTmus was primarily due to an increase in the ratio of average mean inspiratory pressure to maximal inspiratory pressure, indicating decreased respiratory muscle strength reserve. We found a significant correlation between TTmus and the residual volume-to-total lung capacity ratio ( r = 0.504, P = 0.03) and a negative correlation between TTmus and forced expiratory volume in 1 s ( r = -0.704, P < 0.001). In conclusion, children with NMD are prone to respiratory muscle fatigue. TTmus may be useful in assessing tolerance during weaning from mechanical ventilation, identifying impending respiratory failure, and aiding in the decision to institute therapies.

Respiratory muscle fatigue during exercise: implications for performance

1996 ◽  
Vol 28 (9) ◽  
pp. 1129-1137 ◽  
Author(s):  
BRUCE D. JOHNSON ◽  
ELIZABETH A. AARON ◽  
MARK A. BABCOCK ◽  
JEROME A. DEMPSEY
Keyword(s):  
Muscle Fatigue ◽  
Respiratory Muscle ◽  
Respiratory Muscle Fatigue
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