scholarly journals STUDIES ON THE RELATIONSHIP BETWEEN OXYGEN CONSUMPTION AND NITROGEN METABOLISM. III. IN POLYCYTHEMIA VERA

1934 ◽  
Vol 13 (1) ◽  
pp. 15-28
Author(s):  
Adelaide Barer ◽  
W. D. Paul ◽  
C. W. Baldridge
Keyword(s):  
Oxygen Consumption ◽  
Polycythemia Vera ◽  
Nitrogen Metabolism ◽  
The Relationship

Energy expenditure by elite midget male ice hockey players in small-sided games

2017 ◽  
Vol 12 (4) ◽  
pp. 504-513 ◽  
Author(s):  
Charles-Mathieu Lachaume ◽  
François Trudeau ◽  
Jean Lemoyne
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Ice Hockey ◽  
Training Method ◽  
Hockey Players ◽  
Treadmill Testing ◽  
Effective Training ◽  
Relationship Of ◽  
The Relationship

The purpose of this study was to investigate the energy expenditure and heart rate responses elicited in elite male midget ice hockey players during small-sided games. Nine players (aged 15.89 ± 0.33 years) participated in the study. Maximal progressive treadmill testing in the laboratory measured the relationship of oxygen consumption ([Formula: see text]) to heart rate before on-ice assessments of heart rate during six different small-sided games: 1v1, 2v2, 2v2 with support player, 3v3 with support player, 3v3 with transitions, and 4v4 with two support players. Heart rate was recorded continuously in each game. 3v3 T small-sided game was the most intense for all four intensity markers. All six small-sided games reached 89% HRmax or more with heart rate peaks in active effort repetition. These findings demonstrate that such small-sided games are considered as high intensity games and are an effective training method for ice hockey players.

scholarly journals Demam pada Penggunaan Analgesia Persalinan Epidural

2020 ◽  
Vol 1 (1) ◽  
pp. 72-9
Author(s):  
Alfan Mahdi Nugroho ◽  
Yusmein Uyun ◽  
Annemarie Chrysantia Melati
Keyword(s):  
Heart Rate ◽  
Cardiac Output ◽  
Oxygen Consumption ◽  
Epidural Analgesia ◽  
Neonatal Seizure ◽  
Increased Temperature ◽  
Fetal Infection ◽  
Labour Epidural Analgesia ◽  
Clinical Consequences ◽  
The Relationship

Analgesia epidural telah diperkenalkan secara rutin sebagai salah satu modalitas analgesia pada proses persalinan sejak lama. Hubungan antara analgesia epidural persalinan dengan demam intrapartum pada maternal sudah disebutkan pada beberapa literatur. Demam didefinisikan sebagai peningkatan suhu tubuh lebih dari 38 oC yang didapat dari dua kali pemeriksaan. Beberapa teori yang disebutkan antara lain perubahan termoregulasi, infeksi pada ibu-janin dan inflamasi non-infeksi yang dimediasi oleh sitokin proinflamasi. Namun demikian berbagai mekanisme analgesia epidural dapat menyebabkan demam masih terus diteliti. Identifikasi demam pada ibu saat persalinan merupakan hal yang penting untuk dilakukan karena memiliki konsekuensi klinis pada ibu dan neonatus. Pada ibu ditemukan suhu yang meningkat dikaitkan dengan peningkatan denyut jantung ibu, curah jantung, konsumsi oksigen, dan produksi katekolamin. Sedangkan pada janin demam intrapartum dapat menyebabkan sepsis, perubahan skor APGAR, peningkatan kebutuhan bantuan napas dan kejadian kejang. Efek demam pada ibu dan janin masih terus dipelajari, sehingga suatu saat didapatkan cara pencegahan yang paling baik yang pada akhirnya menghindarkan keraguan untuk melakukan analgesia persalinan.   Fever during labour epidural analgesia Abstract Epidural analgesia has been routinely introduced as one of the analgesia modalities during labour. Literature has mentioned the relationship between epidural analgesia and intrapartum fever among mothers. Fever is defined as increased temperature above 38 oC in more than two measurements. Several theories have been proposed, inculing thermoregulation changes, mother-fetal infection, and non-infectious inflammation mediated by proinflammatory cytokines. However, these mechanisms have been continued to evolve. Fever identification in pregnant women is essential to recognize clinical consequences to both mothers and neonates. Increased temperature in mothers is associated with increased heart rate, cardiac output, oxygen consumption, and catecholamines production. Meanwhile, in neonates intrapartum fever is related to sepsis, APGAR score changes, the need of respiratory support and incidence of neonatal seizure. Therefore, these consequences are extensively studied in order to determine the appropriate prevention.

RELATIONSHIP BETWEEN THE LEVEL OF EDUCATION AND FUNCTIONAL CAPACITY IN ACTIVE ELDERLY ADULTS

2014 ◽  
pp. 1-5
Author(s):  
M.-M. DUBUC ◽  
S. BARBAT-ARTIGAS ◽  
A.D. KARELIS ◽  
M. AUBERTIN-LEHEUDRE
Keyword(s):  
Oxygen Consumption ◽  
Functional Capacity ◽  
Maximal Oxygen Consumption ◽  
The Elderly ◽  
Knee Extensors ◽  
Elderly Adults ◽  
Timed Up And Go ◽  
Level Of Education ◽  
Sf 36 ◽  
The Relationship

Background:Both the level of education and functional capacity seems to be associated with the levelof physical activity in the elderly. However, the relationship between the level of education and functionalcapacity in active elderly adults is poorly understood. Objective:To examine the association between the level ofeducation and the functional capacity profile of active elderly adults. Design:Cross-sectional. Participants:Onehundred and four elderly men and 198 postmenauposal women (mean age: 62.7 ± 7.6 years old) were recruitedamong registered members of the YMCAs of Montreal who practiced at least one hour of structured physicalactivity per week. Participants were then divided in two groups based on their level of education (the cut-offpoint was the high-school diploma). Measurements:Body composition (DXA), muscle strength (knee extensors,handgrip), estimated maximal oxygen consumption (2-km walk test), perceived health (SF-36) and functionalcapacity (timed up and go, alternate step and one-leg stance tests) were measured. The level of education of theparticipants was assessed by questionnaire. Results:Body composition was similar between groups. We observedthat all functional capacity tests as well as the global functional capacity score were significantly higher in themost educated group compared to the least educated group (p<0.05). In addition, the most educated group hadsignificantly higher levels of knee extensors strength, estimated maximal oxygen consumption and perception ofphysical functioning. Conclusions:A higher level of education was associated with a favourable functionalcapacity profile in our cohort of active elderly adults. However, the mechanism(s) which could mediate thisassociation remain(s) unknown.

On Respiration in the Dragonet Callionymus Lyra L

1968 ◽  
Vol 49 (3) ◽  
pp. 565-582
Author(s):  
G. M. HUGHES ◽  
SHUN-ICHI UMEZAWA
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Time Course ◽  
Water Pressure ◽  
Minute Volume ◽  
Individual Variations ◽  
Wide Range ◽  
The Relationship ◽  
Respiratory Rhythms ◽  
Normal Ventilation

1. The usefulness of a bottom-living fish, the dragonet (Callionymus lyra), in experiments on fish respiration is described. The position and nature of its opercular opening made it possible to determine directly the volume of water pumped over the gills and the PO2 of the mixed expired water. The normal ventilation volume for a 100 g. fish was about 30 c.c./min. 2. The relationship between cardiac and respiratory rhythms was investigated and showed a variety of ratios. The heart usually beats more than once during each respiratory cycle. Individual variations in the coupling between these rhythms was common and close couplings were observed in the absence of anaesthetic and at normal PO2s. 3. Changes in minute volume produced by altering the hydrostatic pressure across the respiratory system did not affect the heart rate. Percentage utilization fell at higher flow rates. Changes in flow per cm. of water pressure gradient was less with negative gradients than when the static pressure on the mouth side exceeded that in the opercular collecting chamber. 4. Oxygen consumption of the fish is directly related to the ambient PO2 over a wide range (30-120 mm. Hg). Sudden lowering of the PO2 in the inspired water leads to compensatory responses in which the minute volume is maintained or increased as a result of a rise in stroke volume and lowered respiratory frequency: there is also a marked bradycardia. During recovery the increased oxygen consumption of the fish resulted from a rise in utilization rather than a change in the respiratory rate or ventilation volume. 5. Analysis of the time course of the changes in heart rate and ventilation volume in experiments in which PO2 was changed supports the view that the receptors mediating bradycardia occur on the gills and respond directly to the change in PO2 rather than to the secondary increase in flow produced by the hypoxia.

Regulation of oxygen consumption in rat liver slices

1964 ◽  
Vol 206 (5) ◽  
pp. 1091-1094 ◽  
Author(s):  
Herbert L. Kayne ◽  
Natsu Taylor ◽  
Norman R. Alpert
Keyword(s):  
Oxygen Consumption ◽  
Rat Liver ◽  
Adenine Nucleotides ◽  
Pyridine Nucleotide ◽  
Liver Slices ◽  
Low Concentrations ◽  
The Relationship ◽  
Fasted Rats

Oxygen consumption, ATP, ADP, and reduced and oxidized pyridine nucleotide were measured in liver slices which were taken from fed, fasted, and refed rats and subjected to varying durations of anoxia. Oxygen consumption was low in slices from fasted rats and was increased after anoxia in all three groups of rats. Liver slices from fasted rats were also characterized by low concentrations of adenine nucleotides and oxidized pyridine nucleotide. These decreased during anoxia in all groups. Reduced pyridine nucleotide was low in fasted rats, intermediate in fed, and high in refed rats. There was an increase in concentration after 5 min of anoxia. The relationship among these variables is discussed in regard to the concept of nucleotide control of oxygen consumption.

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