Oxygen cost of breathing for assisted spontaneous breathing modes: Investigation into three states of pulmonary function

1995 ◽  
Vol 21 (3) ◽  
pp. 211-217 ◽  
Author(s):  
W. Weyland ◽  
M. Schuhmann ◽  
J. Rathgeber ◽  
A. Weyland ◽  
U. Fritz ◽  
...  
Keyword(s):  
Pulmonary Function ◽  
Spontaneous Breathing ◽  
Oxygen Cost ◽  
Assisted Spontaneous Breathing

scholarly journals Information conveyed by electrical diaphragmatic activity during unstressed, stressed and assisted spontaneous breathing: a physiological study

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lise Piquilloud ◽  
François Beloncle ◽  
Jean-Christophe M. Richard ◽  
Jordi Mancebo ◽  
Alain Mercat ◽  
...  
Keyword(s):  
Spontaneous Breathing ◽  
Physiological Study ◽  
Assisted Spontaneous Breathing

scholarly journals Comparison of the Oxygen Cost of Breathing Exercises and Spontaneous Breathing in Patients With Stable Chronic Obstructive Pulmonary Disease

2003 ◽  
Vol 83 (5) ◽  
pp. 424-431 ◽  
Author(s):  
Alice YM Jones ◽  
Elizabeth Dean ◽  
Cedric CS Chow
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Oxygen Consumption ◽  
Pulmonary Disease ◽  
Spontaneous Breathing ◽  
Breathing Pattern ◽  
Work Of Breathing ◽  
Chronic Obstructive ◽  
Oxygen Cost ◽  
Obstructive Pulmonary Disease ◽  
Breathing Exercises

Abstract Background and Purpose. The oxygen demand of breathing exercises and the clinical implications have not been studied in detail. In this study, the oxygen cost of 3 common breathing exercises believed to reduce oxygen cost (ie, work of breathing) was compared with that of spontaneous breathing in patients with chronic obstructive pulmonary disease (COPD). Subjects. Thirty subjects with stable, moderately severe COPD participated. Methods. Oxygen consumption (V̇o2) and respiratory rate (RR) during spontaneous breathing at rest (SB) were recorded for 10 minutes. Subjects then performed 3 breathing exercises in random order, with a rest between exercises: diaphragmatic breathing (DB), pursed-lip breathing (PLB), and a combination of DB and PLB (CB). Oxygen consumption and RR were measured. Results. Mean V̇o2 (±SD) was lower during the breathing exercises (165.8±22.3 mL O2/min for DB, 164.8±20.9 mL O2/min for PLB, and 167.7±20.7 mL O2/min for CB) compared with SB (174.5±25.2 mL O2/min). Correspondingly, mean RR (±SD) was higher during SB (17.3±4.23 breaths/min), followed by DB (15.0±4.32 breaths/min), PLB (12.8±3.53 breaths/min), and CB (11.2±2.7 breaths/min). Discussion and Conclusion. Given that patients do not spontaneously adopt the breathing pattern with the least V̇o2 and the lowest RR, the results suggest that determinants of the breathing pattern other than metabolic demand warrant being a primary focus in patients with COPD.

Effects of breathing exercises using home-based positive pressure in the expiratory phase in patients with COPD

2019 ◽  
Vol 95 (1127) ◽  
pp. 476-481 ◽  
Author(s):  
Qibin Lin ◽  
Leying Zhuo ◽  
Zhenjie Wu ◽  
Chengye Li ◽  
Meixi Zhou ◽  
...  
Keyword(s):  
Pulmonary Function ◽  
Spontaneous Breathing ◽  
Standard Treatment ◽  
Randomised Trial ◽  
Intervention Group ◽  
Positive Pressure ◽  
Resistive Load ◽  
Breathing Exercise ◽  
Breathing Exercises ◽  
Home Based

BackgroundPatients with chronic obstructive pulmonary disease (COPD) commonly have higher intrinsic positive end-expiratory pressure (PEEPi). A breathing exercise programme strategy employing an appropriate PEEP may improve their pulmonary functional capacity, exercise tolerance and health-related quality of life. Breathing with an expiratory resistive load, which is a method of modulating spontaneous breathing against PEEPi, has not been fully studied in patients with COPD. The objective of this study was to investigate the role of changing spontaneous breathing in home-based conditions and regulating spontaneous breathing with breathing exercises in patients with COPD.MethodsThis was a prospective randomised trial including 64 patients with a diagnosis of stage III or IV COPD. Patients were randomised into two groups: standard treatment and standard treatment combined with breathing exercise rehabilitation. The effects of the treatments on the COPD assessment test (CAT) score, 6‐minute walk test (6MWT) results and pulmonary function were compared at 0, 6, 12 and 18 months within and between the two groups.ResultsAll outcomes showed no significant differences between the two groups at the beginning of the study, while the 6MWT and CAT scores exhibited clinically and statistically significant improvements (p<0.001) by the end of the study. At month 18, the change in the predicted percentage of forced expiratory volume in 1 s (FEV1%pred) differed between the two groups (p<0.05). In addition, there were statistically significant differences in the 6MWT results, CAT scores and FEV1%pred values between the baseline and month 18 (p<0.0001) in the intervention group.ConclusionsImprovements in 6MWT results, pulmonary function and CAT scores are associated with a successful response to breathing against PEEPi in patients with COPD.Trial registrationThis trial was registered at research registry.com (identifier research registry 4816).

Oxygen cost of breathing during assisted breathing modes in comparison to spontaneous breathing

1994 ◽  
Vol 8 (3) ◽  
pp. 132
Author(s):  
W. Weyland ◽  
M. Schuhmann ◽  
J. Rathgeber ◽  
B. Schorn ◽  
G. Laier-Groeneveid ◽  
...  
Keyword(s):  
Spontaneous Breathing ◽  
Oxygen Cost

scholarly journals Pulmonary ventilation reserve function is used to predict intraoperative ventilation function and postoperative outcome in patients with spinal orthopedic surgery

2021 ◽  
Vol 19 ◽  
pp. 205873922110321
Author(s):  
Mingshuai Yu ◽  
Ke Zhang ◽  
Lei Qi ◽  
Siyuan Liu
Keyword(s):  
Pulmonary Function ◽  
Partial Pressure ◽  
Orthopedic Surgery ◽  
Spontaneous Breathing ◽  
Pulmonary Ventilation ◽  
Postoperative Outcome ◽  
Carbon Dioxide Partial Pressure ◽  
Arterial Oxygen ◽  
Group A ◽  
Group B

Objective To investigate the effect of pulmonary ventilation reserve function on perioperative pulmonary function and postoperative outcome in patients undergoing spinal orthopedic surgery. Methods Ninety patients undergoing spinal orthopedic surgery in our hospital from June 2019 to December 2020 were divided into two groups according to the percentage of preoperative pulmonary reserve function index MVV in the predicted value. Arterial oxygen partial pressure, carbon dioxide partial pressure, oxygenation index (OI), airway plateau pressure (Pplat), and airway resistance (AR) of patients in each group were observed before the start of surgery (T0), at 1 h (T1) and 2 h (T2) after the start of surgery, and at the end of surgery (T3). After the end of surgery, the probability of patient transfer to ICU, time to resume spontaneous breathing, and time to extubation were recorded, and PaO2 and inflammatory factors interleukin-6, procalcitonin, and C-reactive protein of patients were followed up for 1 week. Results In both groups, PaO2 and OI decreased obviously while Pplat and AR increased significantly at T1, T2, and T3, but in Group A, Pplat and AR were markedly lower than those in Group B while PaO2 and OI were notably higher than those in Group B ( p < 0.05). Both time to resume spontaneous breathing and time to extubation in Group B were longer than those in Group A ( p < 0.05). The probability of entering ICU in Group B is higher than that in Group A. Both PaO2 and OI at day 3 after surgery in Group B were lower than those in Group A. While, there is no difference at T2. Conclusion For patients, both intraoperative pulmonary function and time to postoperative resuscitation can be predicted by measuring the preoperative MVV, and long-term prognosis will not be affected by the pulmonary function impairment.

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