Use of a Transcutaneous PO2 Electrode for Measuring PO2, Velocity of Flow and Temperature in Extracorporal Fluid Circulation

2015 ◽  
pp. 210-214
Author(s):  
F. Fallenstein ◽  
A. Huch ◽  
R. Huch
Keyword(s):  
Fluid Circulation ◽  
Transcutaneous Po2

scholarly journals The orthopedic characterization of cfap298tm304 mutants validate zebrafish to faithfully model human AIS

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marie-Hardy Laura ◽  
Cantaut-Belarif Yasmine ◽  
Pietton Raphaël ◽  
Slimani Lotfi ◽  
Pascal-Moussellard Hugues
Keyword(s):  
Cerebrospinal Fluid ◽  
Three Dimensional ◽  
Fluid Circulation ◽  
Micro Computed Tomography ◽  
Csf Flow ◽  
Cerebrospinal Fluid Circulation ◽  
Clinical Criteria ◽  
Brain And Spinal Cord ◽  
The Brain

AbstractCerebrospinal fluid (CSF) circulation relies on the beating of motile cilia projecting in the lumen of the brain and spinal cord cavities Mutations in genes involved in cilia motility disturb cerebrospinal fluid circulation and result in scoliosis-like deformities of the spine in juvenile zebrafish. However, these defects in spine alignment have not been validated with clinical criteria used to diagnose adolescent idiopathic scoliosis (AIS). The aim of this study was to describe, using orthopaedic criteria the spinal deformities of a zebrafish mutant model of AIS targeting a gene involved in cilia polarity and motility, cfap298tm304. The zebrafish mutant line cfap298tm304, exhibiting alteration of CSF flow due to defective cilia motility, was raised to the juvenile stage. The analysis of mutant animals was based on micro-computed tomography (micro-CT), which was conducted in a QUANTUM FX CALIPER, with a 59 µm-30 mm protocol. 63% of the cfap298tm304 zebrafish analyzed presented a three-dimensional deformity of the spine, that was evolutive during the juvenile phase, more frequent in females, with a right convexity, a rotational component and involving at least one dislocation. We confirm here that cfap298tm304 scoliotic individuals display a typical AIS phenotype, with orthopedic criteria mirroring patient’s diagnosis.

scholarly journals Structural control on fluid circulation in a graben system: Constraints from the Saint Pierre Bois quarry (Vosges, France)

2021 ◽  
Vol 146 ◽  
pp. 104323
Author(s):  
Chrystel Dezayes ◽  
Catherine Lerouge ◽  
Christophe Innocent ◽  
Philippe Lach
Keyword(s):  
Structural Control ◽  
Fluid Circulation

Dynamics of fluid circulation in coupled free and heterogeneous porous domains

2007 ◽  
Vol 62 (13) ◽  
pp. 3549-3573 ◽  
Author(s):  
Diganta Bhusan Das ◽  
Mark Lewis
Keyword(s):  
Fluid Circulation

HALOTHANE DOES NOT CAUSE A CLINICALLY SIGNIFICANT DRIFT IN A TRANSCUTANEOUS PO2 SENSOR

1985 ◽  
Vol 63 (Supplement) ◽  
pp. A165
Author(s):  
K. K. Tremper ◽  
S. J. Barker ◽  
R. H. Wender ◽  
D. H. Blatt ◽  
P. H. Rubel ◽  
...  
Keyword(s):  
Clinically Significant ◽  
Transcutaneous Po2

Limitations of Transcutaneous Po2 and Pco2 Monitoring in Infants with Bronchopulmonary Dysplasia

PEDIATRICS ◽  
1984 ◽  
Vol 74 (2) ◽  
pp. 217-220
Author(s):  
Ellen S. Rome ◽  
Eileen K. Stork ◽  
Waldemar A. Carlo ◽  
Richard J. Martin
Keyword(s):  
Bronchopulmonary Dysplasia ◽  
Premature Infants ◽  
Neonatal Period ◽  
Postnatal Life ◽  
Pco2 Monitoring ◽  
Arterial Po2 ◽  
Transcutaneous Po2

Despite the well-documented correlation between transcutaneous and arterial Po2 and Pco2 in sick neonates, the effect of maturation on this relationship has not been well characterized. Eight premature infants with bronchopulmonary dysplasia (BPD) and indwelling arterial lines beyond the immediate neonatal period were studied. Transcutaneous Po2 always underestimated Pao2 beyond 10 weeks of postnatal life, such that transcutaneous Po2 - Pao2 was -16 ± 5 torr (P < .001). Corrected transcutaneous Pco2 simultaneously overestimated PaCo2 by 9 ± 3 torr (P < .001), although this occurred over a wider range of postnatal ages. Transcutaneous Po2 monitoring may be a useful tool for estimating Pao2 in this population, provided an appropriate correction is made beyond 10 weeks of age. It is suggested that caution be exercised when using transcutaneous Pco2 measurements to estimate absolute arterial values in older infants with bronchopulmonary dysplasia.

Pipe stick problems of deep well drilling

2021 ◽  
Vol 66 (05) ◽  
pp. 192-195
Author(s):  
Rövşən Azər oğlu İsmayılov ◽  
Keyword(s):  
Drilling Fluid ◽  
Drill Pipe ◽  
Drill String ◽  
Differential Pressure ◽  
Drilling Mud ◽  
Fluid Circulation ◽  
Well Drilling ◽  
Deep Well ◽  
Pressure Pipe ◽  
Bottomhole Pressure

The aricle is about the pipe stick problems of deep well drilling. Pipe stick problem is one of the drilling problems. There are two types of pipe stick problems exist. One of them is differential pressure pipe sticking. Another one of them is mechanical pipe sticking. There are a lot of reasons for pipe stick problems. Indigators of differential pressure sticking are increase in torque and drug forces, inability to reciprocate drill string and uninterrupted drilling fluid circulation. Key words: pipe stick, mecanical pipe stick,difference of pressure, drill pipe, drilling mud, bottomhole pressure, formation pressure

Study of fluid circulation through the chicxulub crater using Rock-Eval pyrolysis and fluid inclusions

2022 ◽  
pp. 105194
Author(s):  
L. Hernandez-Terrones ◽  
L. Martínez ◽  
J. Szamotulski ◽  
E. González-Partida ◽  
J.V. Morgan ◽  
...  
Keyword(s):  
Fluid Inclusions ◽  
Fluid Circulation ◽  
Chicxulub Crater ◽  
Rock Eval

Effect of Acute Hemorrhage on Transcutaneous, Subcutaneous, Intramuscular, and Arterial Oxygen Tensions

PEDIATRICS ◽  
1980 ◽  
Vol 65 (5) ◽  
pp. 881-883
Author(s):  
Frederick A. Matsen ◽  
Craig R. Wyss ◽  
Racheal V. King ◽  
Charles W. Simmons
Keyword(s):  
Arterial Oxygen ◽  
Peripheral Blood Flow ◽  
Danger Signal ◽  
Close Approximation ◽  
Monitoring Method ◽  
Acute Hemorrhage ◽  
Tissue Po2 ◽  
Oxygen Tensions ◽  
Arterial Po2 ◽  
Transcutaneous Po2

Although transcutaneous Po2 is a close approximation of arterial Po2 in most neonates, infants in shock often show lower transcutaneous than arterial Po2 values. For a better understanding of this discrepancy, we investigated the effect of acute hemorrhage on transcutaneous, tissue, and arterial Po2 in rabbits. With progressive hemorrhage, transcutaneous and tissue Po2 values declined steeply while arterial Po2 values did not. We speculate that the progressive decrement in transcutaneous and tissue Po2 values with hemorrhage is produced by diminished peripheral blood flow. Rather than representing a failure of the transcutaneous Po2 monitoring method, we speculate that transcutaneous hypoxia with shock may be a clinically valuable danger signal.

Geophysical measurements in an abandoned old railway tunnel located in a karst area

2021 ◽  
Author(s):  
Enzo Rizzo ◽  
Luigi Capozzoli ◽  
Gregory De Martino ◽  
Giacomo Fornasari ◽  
Valeria Giampaolo
Keyword(s):  
Karst Aquifer ◽  
Geophysical Methods ◽  
Water Reservoir ◽  
Test Site ◽  
Point Of View ◽  
Karst Area ◽  
Fluid Circulation ◽  
Railway Tunnel ◽  
Interdisciplinary Field ◽  
Karst Systems

<p>Carbonate aquifers in karst systems are very important water reservoir and are recognized as the most difficult to characterize. The purpose of this article is to present a project aimed to understand the circulation of fluids in carbonate reservoirs through innovative hydrogeophysical methodologies both in the laboratory and in the field. The test site is located in the Castel di Lepre karst system, which is disposed in the Mezo-Cenozoic carbonate substratum of the Monti della Maddalena ridge (Southern Appenines). In the karst area are located several caves, but the presence of an artificial tunnel (disused railway tunnel) could give the opportunity to characterize the whole area and the fluid circulation by multisensors geophysical sensors installed inside the karst aquifer. This natural laboratory permits to define an Applied Geophysics strategy developing several main topics from an engineering to hydrogeological point of view. Firstly, the geophysical investigations conducted, without altering the structure and in a fast manner, obtains important information concerning the construction of the tunnel, and the interaction between the infrastructure and surrounding rock, in that area that we define infrastructural critical zone. The study conducted aims to highlight the potential and any limitations of the use of geophysical techniques applied to infrastructures, emphasizing the emerging role of urban geophysics for the importance and topicality of its contents as well as the important innovations that the use of these techniques they can contribute to the hazardous processes. Secondly, the geophysical methods are used as a tool to characterize the fluid circulation by hydrogeophysal sensors installed inside the karst aquifer. The hydrogeophysics arose as an interdisciplinary field that focuses on the improved understanding of hydrological processes through geophysical observation. These approaches aimed at mitigating the detrimental effects of environmental problems.</p>

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