scholarly journals Respiration parameter determination with non-obstructive methods

2020 ◽  
Vol 18 ◽  
pp. 89-95
Author(s):  
Sven Fisahn ◽  
Christian Siebauer ◽  
Jan Ringkamp ◽  
Kirsten J. Dehning ◽  
Stefan Zimmermann ◽  
...  
Keyword(s):  
Tidal Volume ◽  
High Frequency ◽  
Positive Airway Pressure ◽  
Artificial Ventilation ◽  
Parameter Determination ◽  
Dynamic Changes ◽  
Endotracheal Tubes ◽  
Respiratory Parameters ◽  
Lung Phantom ◽  
Difference Time

Abstract. Measuring respiratory parameters like the breathing frequency or the tidal volume is essential in intensive care to ensure an optimal and lung protecting ventilation. A common practice in artificial ventilation of sensitive patients like infants or neonates is the use of uncuffed endotracheal tubes in combination with continuous positive airway pressure (CPAP). This comes with the disadvantage of an unknown leakage making it difficult to detect spontaneous breathing or to measure the tidal volume reliable. A novel non-obstructive method to determine respiratory parameters as well as dynamic changes of thoracic parameters has recently been presented and uses a pair of coupled UHF (ultra high frequency) antennae. In this paper, a respective setup is investigated numerically using finite difference time domain method and experimentally using an artificial lung phantom. Both approaches show that the investigated method seems capable of allowing a contactless triggering to synchronize natural and artificial breathing. The results are compared to derive a better understanding of influencing factors and opportunities for an optimisation.

scholarly journals A novel non-invasive, non-conductive method for measuring respiration

2020 ◽  
Vol 9 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Jan Ringkamp ◽  
Philipp Radler ◽  
Philipp Lebhardt ◽  
Jens Langejürgen
Keyword(s):  
High Frequency ◽  
Effective Permittivity ◽  
Artificial Lung ◽  
High Reproducibility ◽  
Promising Candidate ◽  
Dynamic Changes ◽  
Non Invasive ◽  
Respiratory Parameters ◽  
Strong Linear Correlation ◽  
Novel Method

Abstract. We present a novel method for measuring dynamic changes in respiration parameters due to breathing based on the coupling of two ultra-high-frequency (UHF) antennae. For evaluation, we built a dynamic 3-D printed phantom encasing two compartments separated by an elastic diaphragm. By filling this artificial lung with air the effective permittivity in the compartment changes, resulting in a significant variation of the S21 parameter's magnitude and phase. We show that there is a strong linear correlation between the volume of air in the artificial lung and the magnitude (in dB) of the S21 parameter (R2=0.997) as well as the parameter's phase (R2=0.975). Our sensor system shows a high reproducibility (standard deviation of predicted volume =0.67 mL) and a timing similar to a conventional flow sensor (delay =5.33 ms). The presented method is a promising candidate to overcome some of the most important technical burdens of measuring respiratory parameters and might be used as a trigger for patient–ventilator synchronization in infants and neonates.

scholarly journals B-PO04-089 HIGH FREQUENCY LOW TIDAL VOLUME VENTILATION IN ATRIAL FIBRILLATION ABLATION SAFELY REDUCES RADIOFREQUENCY AND PROCEDURAL TIMES

Heart Rhythm ◽  
2021 ◽  
Vol 18 (8) ◽  
pp. S315
Author(s):  
Jose Osorio ◽  
Allyson L. Varley ◽  
Anil Rajendra ◽  
Paul C. Zei ◽  
Joshua R. Silverstein ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Tidal Volume ◽  
High Frequency ◽  
Atrial Fibrillation Ablation ◽  
Low Tidal Volume ◽  
Low Tidal Volume Ventilation ◽  
Volume Ventilation

scholarly journals Measurement of Tidal Volume during High- Frequency Jet Ventilation1

1986 ◽  
Vol 20 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Stuart A Weisberger ◽  
Waldemar A Carlo ◽  
Janie M Fouke ◽  
Robert L Chatburn ◽  
Thomas Tillander ◽  
...  
Keyword(s):  
Tidal Volume ◽  
High Frequency

scholarly journals NASAL HIGH FREQUENCY OSCILLATION AND NASAL CONTINUOUS POSITIVE AIRWAY PRESSURE FOR RESPIRATORY INSUFFIENCY IN NEWBORN INFANTS 1946

1996 ◽  
Vol 39 ◽  
pp. 327-327
Author(s):  
Eric G Brouwer ◽  
Mark A van der Hoeven ◽  
Danillo W Gavilanes ◽  
Pieter L Degraeuwe ◽  
Wiel J Maertzdort ◽  
...  
Keyword(s):  
Continuous Positive Airway Pressure ◽  
High Frequency ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Newborn Infants ◽  
High Frequency Oscillation ◽  
Frequency Oscillation

Abstract 13216: Initial Survey of Respiratory Mechanics During Prehospital Bag Ventilation

Circulation ◽  
2021 ◽  
Vol 144 (Suppl_2) ◽  
Author(s):  
Betty Y Yang ◽  
Jennifer E Blackwood ◽  
Jenny Shin ◽  
Sally Guan ◽  
Mengqi Gao ◽  
...  
Keyword(s):  
Tidal Volume ◽  
Respiratory Mechanics ◽  
Predicted Body Weight ◽  
Convenience Sample ◽  
Measuring Device ◽  
Respiratory Parameters ◽  
Initial Survey ◽  
Post Intubation ◽  
End Tidal ◽  
The Relationship

Introduction: Respiratory mechanics, such as tidal volume and inspiratory pressures, affect outcome in hospitalized patients with respiratory failure. The ability to accurately measure respiratory mechanics in the prehospital setting is limited, thus the relationship between prehospital respiratory mechanics and clinical outcome is not well understood. In this feasibility study, we examined respiratory mechanics of bag-valve mask (BVM) ventilation by emergency medical services (EMS) using a novel in-line measuring device during a period when agencies switched from larger to smaller ventilation bags. Methods: This prospective cohort study included a convenience sample of adult patients who received BVM ventilation by EMS, from August 2018 to January 2020, in Bellevue, Washington. The airway monitoring device was applied by paramedics after intubation to passively record in black box mode, until termination of efforts or hospital arrival. Respiratory parameters included tidal volume, airway pressure, flow rates, end-tidal carbon dioxide, and respiratory rate. Prehospital agencies transitioned from large (1500 mL) to small (1000 mL) ventilation bags during the study period. Results: 7371 post-intubation breaths were measured in 54 patients, 32 treated for out-of-hospital cardiac arrest (OHCA) and 22 treated for non-arrest conditions, primarily respiratory etiology. EMS ventilated 19 patients with a small bag and 35 patients with a large bag. Ventilation with a smaller bag was characterized by less variability in tidal volumes and higher proportion of breaths delivered within 4-10 mL/kg of predicted body weight (Figure) (p<0.05). Conclusions: Respiratory mechanics can be measured in EMS patients receiving BVM ventilation following intubation. Ventilation with a smaller bag might reduce variation in tidal volume, but further study is needed. These data provide the first evaluation of respiratory mechanics during manual ventilation provided by EMS.

Frühgeborene: Nasale Hochfrequenz-Oszillationsbeatmung vs. nasaler CPAP

2021 ◽  
Vol 225 (05) ◽  
pp. 389-390
Keyword(s):  
Continuous Positive Airway Pressure ◽  
Respiratory Distress Syndrome ◽  
Respiratory Distress ◽  
High Frequency ◽  
Airway Pressure ◽  
Distress Syndrome ◽  
Positive Airway Pressure ◽  
High Frequency Oscillatory Ventilation ◽  
Oscillatory Ventilation ◽  
High Frequency Oscillatory

Viele Frühgeborene mit einem Atemnotsyndrom (engl. Respiratory Distress Syndrome, RDS) erhalten zunächst eine nicht invasive Atemunterstützung. Ein chinesisches Forscherteam untersuchte nun, welche Methode besser vor einem invasiven mechanischen Beatmungsbedarf schützte: Der nasale CPAP (Continuous Positive Airway Pressure) oder die nasale HFOV (High-Frequency Oscillatory Ventilation).

ARTIFICIAL VENTILATION IN HYALINE MEMBRANE DISEASE: THE USE OF POSITIVE END-EXPIRATORY PRESSURE AND CONTINUOUS POSITIVE AIRWAY PRESSURE

PEDIATRICS ◽  
1973 ◽  
Vol 51 (4) ◽  
pp. 629-640
Author(s):  
Niloufer Cumarasamy ◽  
Rosmarie Nüssli ◽  
Dieter Vischer ◽  
Peter H. Dangel ◽  
Gabriel V. Duc
Keyword(s):  
Mechanical Ventilation ◽  
Survival Rate ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Artificial Ventilation ◽  
Controlled Trial ◽  
Hyaline Membrane Disease ◽  
Positive End Expiratory Pressure ◽  
Hyaline Membrane

During the years 1969, 1970, and 1971, 120 infants with hyaline membrane disease were studied, of whom 71 were treated with artificial ventilation. Among other changes in 1971, positive end-expiratory pressure was applied during mechanical ventilation and continuous positive airway pressure maintained during the weaning period. The survival rate of the ventilated babies increased from 23% in the preceding two years to 70% in 1971. As this study is not a controlled trial, the observed increase in survival cannot be ascribed to the application of increased airway pressure alone. The data presented, though necessarily inconclusive, may be useful for continuing comparisons with other pediatric centers.

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