Balancing Unbalanced Breathing: The Clinical Use of Capnographic Biofeedback

Biofeedback ◽  
2013 ◽  
Vol 41 (4) ◽  
pp. 183-187
Author(s):  
Andrea Meckley
Keyword(s):  
Carbon Dioxide ◽  
Biofeedback Training ◽  
Physiological Effects ◽  
Clinical Use ◽  
Breathing Patterns ◽  
Panic Disorders ◽  
Panic Symptoms ◽  
Carbon Dioxide Levels ◽  
Dysfunctional Breathing ◽  
The Impact

Dysfunctional breathing, primarily in the form of overbreathing or hyperventilation, has been reported to play a major role for some individuals with anxiety and panic disorders. This is due to the decrease in carbon dioxide, a state called hypocapnia, which results from hyperventilation. The author reviews the physiological effects of hypocapnia and describes how carbon dioxide levels are measured with capnography. In addition, she introduces the use of capnography as a form of biofeedback and outlines ways to incorporate capnography into a clinical setting. Capnographic biofeedback enables individuals to become aware of the impact dysfunctional breathing has on their symptoms and assists them in learning more balanced, healthy breathing patterns. Use of this type of biofeedback training has been found to decrease panic symptoms and may be useful in improving physiological functioning in other medical and psychiatric disorders as well.

scholarly journals Modelling key market impacts and land allocation for biofuel production and forestry

2006 ◽  
Vol 2006 ◽  
pp. 1-12
Author(s):  
A. Korobeinikov ◽  
P. Read ◽  
A. Parshotam ◽  
J. Lermit
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Large Scale ◽  
Low Cost ◽  
Wood Products ◽  
Biofuel Production ◽  
Fuel Wood ◽  
Carbon Dioxide Levels ◽  
The Cost ◽  
The Impact

It has been suggested that the large scale use of biofuel, that is, fuel derived from biological materials, especially in combination with reforestation of large areas, can lead to a low-cost reduction of atmospheric carbon dioxide levels. In this paper, a model of three markets: fuel, wood products, and land are considered with the aim of evaluating the impact of large scale biofuel production and forestry on these markets, and to estimate the cost of a policy aimed at the reduction of carbon dioxide in the atmosphere. It is shown that the costs are lower than had been previously expected.

scholarly journals Examining the impact of carbon dioxide levels and modulation of resulting hydrogen peroxide in Chlorella vulgaris

2021 ◽  
Vol 60 ◽  
pp. 102492
Author(s):  
Chien-Ting Li ◽  
Kevin Trigani ◽  
Cristal Zuñiga ◽  
Richard Eng ◽  
Elizabeth Chen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Chlorella Vulgaris ◽  
Carbon Dioxide Levels ◽  
The Impact

Panic Symptoms after Inhalation of Carbondioxide

1984 ◽  
Vol 144 (5) ◽  
pp. 503-507 ◽  
Author(s):  
Marcel A. van den Hout ◽  
Eric Griez
Keyword(s):  
Carbon Dioxide ◽  
Beta Blocker ◽  
Cent Oxygen ◽  
Exposure Treatment ◽  
Panic Disorders ◽  
Cent Carbon Dioxide ◽  
Panic Symptoms ◽  
Lactate Infusion

SummaryThe effects of inhaling a mixture of 35 per cent carbon dioxide and 65 per cent oxygen on the occurrence of panic symptoms defined by the DSM III, was investigated. Compared to a placebo (air), carbon dioxide produced more panic symptoms. If carbon dioxide inhalation was preceded by intake of a beta-blocker (60 mg propranolol), less symptoms occurred than if preceded by a placebo. The results are compared with earlier reports on the effects of lactate infusion. It is argued that panic disorders can be conceptualized as a fear of internal (panic) sensations and that inhalation of a mixture of carbon dioxide and oxygen may constitute an effective exposure treatment.

scholarly journals Physiological Effects of Physical Postharvest Treatments on Insects

2003 ◽  
Vol 13 (2) ◽  
pp. 272-275 ◽  
Author(s):  
Lisa G. Neven
Keyword(s):  
Carbon Dioxide ◽  
Temperature Extremes ◽  
Physiological Effects ◽  
X Rays ◽  
Low Oxygen ◽  
Agricultural Chemicals ◽  
Modified Atmospheres ◽  
Insect Mortality ◽  
Physical Treatments ◽  
The Impact

As concerns about the safety of our food supply increase along with concerns about the impact of agricultural chemicals on our environment, the development of nonchemical quarantine treatments to meet export requirements become increasingly necessary. The types of physical treatments used have been largely determined by commodity tolerances and processing practices. The most common physical treatments use temperature extremes such as heat [>40 °C (104.0 °F)] and cold [<10 °C (50.0 °F)]. Other physical treatments commonly include the use of controlled or modified atmospheres (low oxygen, elevated carbon dioxide). Current technology has led to investigations in the application of energy to control infesting insects. These treatments include ionizing radiation, microwaves, ultraviolet radiation, infrared radiation, radio frequency, electron beam, X-rays, and electricity. Although the effects of these physical treatments can impact commodity quality, the goal of the treatments is to kill infesting (real or in certain instances, potential) insects to meet quarantine requirements. The effects of physical treatments on insect mortality and fecundity are discussed.

scholarly journals Oxygen therapy and inpatient mortality in COPD exacerbation

2020 ◽  
pp. emermed-2019-209257
Author(s):  
Carlos Echevarria ◽  
John Steer ◽  
James Wason ◽  
Stephen Bourke
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Saturation ◽  
Supplemental Oxygen ◽  
Early Warning Score ◽  
Copd Exacerbation ◽  
Inpatient Mortality ◽  
Oxygen Saturation Level ◽  
Risk Of Death ◽  
Carbon Dioxide Levels ◽  
The Impact

BackgroundIn hospitalised patients with exacerbation of Chronic Obstructive Pulmonary Disease, European and British guidelines endorse oxygen target saturations of 88%–92%, with adjustment to 94%–98% if carbon dioxide levels are normal. We assessed the impact of admission oxygen saturation level and baseline carbon dioxide on inpatient mortality.MethodsPatients were identified from the prospective Dyspnoea, Eosinopenia, Consolidation, Acidaemia and Atrial Fibrillation (DECAF) derivation study (December 2008–June 2010) and the mixed methods DECAF validation study (January 2012 to May 2014). In six UK hospitals, of 2645 patients with COPD exacerbation, 1027 patients were in receipt of supplemental oxygen at admission. All had a clinical history of COPD and obstructive spirometry. These patients were subdivided into the following groups: admission oxygen saturations of 87% or less, 88%–92%, 93%–96% or 97%–100%. Inpatient mortality was calculated for each group and expressed as ORs. The DECAF score and National Early Warning Score 2 (excluding oxygen saturation) were used in binary logistic regression to adjust for baseline risk.ResultsIn patients with COPD receiving supplemental oxygen, oxygen saturations above 92% were associated with higher mortality and an adverse dose–response. Compared with the 88%–92% group, the adjusted risk of death (OR) in the 93%–96% and 97%–100% groups was 1.98 (95% CI 1.09 to 3.60, p=0.025) and 2.97 (95% CI 1.58 to 5.58, p=0.001). In the subgroup with normocapnia, the mortality signal remained significant in both the 93%–96% and 97%–100% groups.ConclusionsInpatient mortality was lowest in those with oxygen saturations of 88%–92%. Even modest elevations in oxygen saturations above this range (93%–96%) were associated with an increased risk of death. A similar mortality trend was seen in both patients with hypercapnia and normocapnia. This shows that the practice of setting different target saturations based on carbon dioxide levels is not justified. Treating all patients with COPD with target saturations of 88%–92% will simplify prescribing and should improve outcome.Trial registration numberUKCRN ID 14214.

Climate-forced changes of bio-productivity of Belorussian terrestrial ecosystems

2019 ◽  
pp. 77-88
Author(s):  
S. A. Lysenko
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Vegetation Index ◽  
Precipitation Amount ◽  
Terrestrial Ecosystems ◽  
Vegetation Period ◽  
Climatic Trend ◽  
Vegetation Growth ◽  
Current Century ◽  
The Impact

The spatial and temporal particularities of Normalized Differential Vegetation Index (NDVI) changes over territory of Belarus in the current century and their relationship with climate change were investigated. The rise of NDVI is observed at approximately 84% of the Belarus area. The statistically significant growth of NDVI has exhibited at nearly 35% of the studied area (t-test at 95% confidence interval), which are mainly forests and undeveloped areas. Croplands vegetation index is largely descending. The main factor of croplands bio-productivity interannual variability is precipitation amount in vegetation period. This factor determines more than 60% of the croplands NDVI dispersion. The long-term changes of NDVI could be explained by combination of two factors: photosynthesis intensifying action of carbon dioxide and vegetation growth suppressing action of air warming with almost unchanged precipitation amount. If the observed climatic trend continues the croplands bio-productivity in many Belarus regions could be decreased at more than 20% in comparison with 2000 year. The impact of climate change on the bio-productivity of undeveloped lands is only slightly noticed on the background of its growth in conditions of rising level of carbon dioxide in the atmosphere.

scholarly journals Carbon dioxide levels in neonates: what are safe parameters?

2021 ◽  
Author(s):  
Sie Kei Wong ◽  
M. Chim ◽  
J. Allen ◽  
A. Butler ◽  
J. Tyrrell ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Systematic Review ◽  
Side Effects ◽  
Preterm Infants ◽  
Periventricular Leukomalacia ◽  
List Type ◽  
Permissive Hypercapnia ◽  
Prisma Statement ◽  
Carbon Dioxide Levels ◽  
Online Software

Abstract There is no consensus on the optimal pCO2 levels in the newborn. We reviewed the effects of hypercapnia and hypocapnia and existing carbon dioxide thresholds in neonates. A systematic review was conducted in accordance with the PRISMA statement and MOOSE guidelines. Two hundred and ninety-nine studies were screened and 37 studies included. Covidence online software was employed to streamline relevant articles. Hypocapnia was associated with predominantly neurological side effects while hypercapnia was linked with neurological, respiratory and gastrointestinal outcomes and Retinpathy of prematurity (ROP). Permissive hypercapnia did not decrease periventricular leukomalacia (PVL), ROP, hydrocephalus or air leaks. As safe pCO2 ranges were not explicitly concluded in the studies chosen, it was indirectly extrapolated with reference to pCO2 levels that were found to increase the risk of neonatal disease. Although PaCO2 ranges were reported from 2.6 to 8.7 kPa (19.5–64.3 mmHg) in both term and preterm infants, there are little data on the safety of these ranges. For permissive hypercapnia, parameters described for bronchopulmonary dysplasia (BPD; PaCO2 6.0–7.3 kPa: 45.0–54.8 mmHg) and congenital diaphragmatic hernia (CDH; PaCO2 ≤ 8.7 kPa: ≤65.3 mmHg) were identified. Contradictory findings on the effectiveness of permissive hypercapnia highlight the need for further data on appropriate CO2 parameters and correlation with outcomes. Impact There is no consensus on the optimal pCO2 levels in the newborn. There is no consensus on the effectiveness of permissive hypercapnia in neonates. A safe range of pCO2 of 5–7 kPa was inferred following systematic review.

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