scholarly journals Reduction of COPD Hyperinflation by Endobronchial Valves Improves Intercostal Muscle Morphology on Ultrasound

2020 ◽  
Vol Volume 15 ◽  
pp. 3251-3259
Author(s):  
Peter Wallbridge ◽  
Mark Hew ◽  
Selina M Parry ◽  
Louis Irving ◽  
Daniel Steinfort
Keyword(s):  
Intercostal Muscle ◽  
Muscle Morphology

Alterations in Intercostal Muscle Morphology and Biochemistry in Patients with Obstructive Lung Disease1,2

1980 ◽  
Vol 122 (5) ◽  
pp. 679-686 ◽  
Author(s):  
John A. Campbell ◽  
Richard L. Hughes ◽  
Vinod Sahgal ◽  
J. Frederiksen ◽  
T. W. Shields
Keyword(s):  
Intercostal Muscle ◽  
Muscle Morphology

scholarly journals Noninvasive Assessment of Neuromechanical Coupling and Mechanical Efficiency of Parasternal Intercostal Muscle during Inspiratory Threshold Loading

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1781
Author(s):  
Manuel Lozano-García ◽  
Luis Estrada-Petrocelli ◽  
Abel Torres ◽  
Gerrard F. Rafferty ◽  
John Moxham ◽  
...  
Keyword(s):  
Mechanical Efficiency ◽  
Intercostal Muscle ◽  
Wireless Devices ◽  
Clinical Value ◽  
Intercostal Muscles ◽  
Noninvasive Measurements ◽  
Standard Assessment ◽  
Mouth Pressure ◽  
Invasive Techniques ◽  
Increasing Load

This study aims to investigate noninvasive indices of neuromechanical coupling (NMC) and mechanical efficiency (MEff) of parasternal intercostal muscles. Gold standard assessment of diaphragm NMC requires using invasive techniques, limiting the utility of this procedure. Noninvasive NMC indices of parasternal intercostal muscles can be calculated using surface mechanomyography (sMMGpara) and electromyography (sEMGpara). However, the use of sMMGpara as an inspiratory muscle mechanical output measure, and the relationships between sMMGpara, sEMGpara, and simultaneous invasive and noninvasive pressure measurements have not previously been evaluated. sEMGpara, sMMGpara, and both invasive and noninvasive measurements of pressures were recorded in twelve healthy subjects during an inspiratory loading protocol. The ratios of sMMGpara to sEMGpara, which provided muscle-specific noninvasive NMC indices of parasternal intercostal muscles, showed nonsignificant changes with increasing load, since the relationships between sMMGpara and sEMGpara were linear (R2 = 0.85 (0.75–0.9)). The ratios of mouth pressure (Pmo) to sEMGpara and sMMGpara were also proposed as noninvasive indices of parasternal intercostal muscle NMC and MEff, respectively. These indices, similar to the analogous indices calculated using invasive transdiaphragmatic and esophageal pressures, showed nonsignificant changes during threshold loading, since the relationships between Pmo and both sEMGpara (R2 = 0.84 (0.77–0.93)) and sMMGpara (R2 = 0.89 (0.85–0.91)) were linear. The proposed noninvasive NMC and MEff indices of parasternal intercostal muscles may be of potential clinical value, particularly for the regular assessment of patients with disordered respiratory mechanics using noninvasive wearable and wireless devices.

Intercostal muscle reflexes and sleep breathing patterns in the human infant

1980 ◽  
Vol 48 (1) ◽  
pp. 139-146 ◽  
Author(s):  
B. T. Thach ◽  
I. F. Abroms ◽  
I. D. Frantz ◽  
A. Sotrel ◽  
E. N. Bruce ◽  
...  
Keyword(s):  
Rem Sleep ◽  
Cervical Spinal Cord ◽  
Human Infant ◽  
Neural Pathways ◽  
Normal Infant ◽  
Intercostal Muscle ◽  
Breathing Patterns ◽  
Quiet Sleep ◽  
Term Infants ◽  
Airway Occlusion

Breathing variability and apnea characteristic of rapid eye movement (REM) sleep was investigated in a newborn infant with complete interruption of intercostal to phrenic neural pathways due to intrapartem transection of the cervical spinal cord. Breath-to-breath variability in inspiratory duration (TI), breath duration (Ttot), tidal volume (VT), and ventilation (VI) was significantly greater in REM than in quiet sleep and was similar to the variability in these parameters seen in normal infants. In addition, brief periods of diaphragmeatic apnea were observed during REM sleep. The phenomenon of shortened TI during airway occlusion previously attributed to intercostal-to-phrenic reflexes was examined in the quadriplegic infant and in seven healthy term infants. The frequency of this response was increased when airway occlusion was delayed until after onset of inspiration. Shortening of TI by occlusion occurred no less frequently in the quadriplegic than in the control infants. The constant paradoxical inward movement of the rib cage during inspiration observed in the quadriplegic infant suggests that supraspinal innervation of intercostal muscle limits such paradoxical movements in the normal infant. The quadriplegic infant's end-expiratory volume was consistently above his passive functional residual capacity, as inferred from respiratory volume and pressure measurements.

Diaphragmatic work of breathing in premature human infants

1987 ◽  
Vol 62 (4) ◽  
pp. 1410-1415 ◽  
Author(s):  
B. G. Guslits ◽  
S. E. Gaston ◽  
M. H. Bryan ◽  
S. J. England ◽  
A. C. Bryan
Keyword(s):  
Lung Disease ◽  
Preterm Infants ◽  
Work Of Breathing ◽  
Mechanical Efficiency ◽  
Strongly Correlated ◽  
Intercostal Muscle ◽  
Human Infants ◽  
Transdiaphragmatic Pressure ◽  
Rib Cage ◽  
Inspiratory Work

Present methods of assessing the work of breathing in human infants do not account for the added load when intercostal muscle activity is lost and rib cage distortion occurs. We have developed a technique for assessing diaphragmatic work in this circumstance utilizing measurements of transdiaphragmatic pressure and abdominal volume displacement. Eleven preterm infants without evidence of lung disease were studied. During periods of minimal rib cage distortion, inspiratory diaphragmatic work averaged 5.9 g X cm X ml-1, increasing to an average of 12.4 g X cm X ml-1 with periods of paradoxical rib cage motion (P less than 0.01). Inspiratory work was strongly correlated with the electrical activity of the diaphragm as measured from its moving time average (P less than 0.05). Assuming a mechanical efficiency of 4% in these infants, the caloric cost of diaphragmatic work may reach 10% of their basal metabolic rate in periods with rib cage distortion. When lung disease is superimposed, the increased metabolic demands of the diaphragm may predispose preterm infants to fatigue and may contribute to a failure to grow.

Intercostal muscle oxygenation during expiratory load breathing at rest

2019 ◽  
Vol 261 ◽  
pp. 24-30
Author(s):  
Quentin Bretonneau ◽  
Aurélien Pichon ◽  
Claire de Bisschop
Keyword(s):  
Muscle Oxygenation ◽  
Intercostal Muscle

Electrode for selective recording of electromyograms from intercostal muscles

1989 ◽  
Vol 67 (5) ◽  
pp. 2125-2128 ◽  
Author(s):  
W. A. Whitelaw ◽  
D. R. Markham
Keyword(s):  
Animal Experiments ◽  
The Other ◽  
Bipolar Electrode ◽  
Metal Foil ◽  
Intercostal Muscle ◽  
Recording Electrode ◽  
Electrical Field ◽  
Single Motor Unit ◽  
Minimal Trauma ◽  
Wire Hook

An electromyogram-recording electrode is described that makes it possible to record separately the electrical signals generated within two closely approximated muscle layers. The device consists of two bipolar wire hook electrodes embedded in opposite faces of a thin laminated plastic wafer. The middle lamina of the wafer is a sheet of metal foil that shields the electrical field on one side of the wafer from the bipolar electrode on the other side. The device was tested by inserting it from the inside of the chest wall between the internal and external intercostal muscle layers. Signals from the two muscle layers were clearly separated. Single motor unit spikes were attenuated by factors ranging from 41 to 2.4. The device can be implanted with minimal trauma to surrounding muscles and is suitable for chronic animal experiments.

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