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helium

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Description

Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, inert, monatomic gas. Helium is the second most abundant element in the observable universe, after hydrogen. Helium is found in natural gas deposits, which are the main source of commercial helium production. Helium is used in a variety of applications, including:
* Inert gas shielding for arc welding and in growing single crystals of silicon for semiconductors.
* As a lifting gas in airships and balloons.
* As a coolant for superconducting magnets in MRI scanners and particle accelerators.
* As a tracer gas in leak detection.
* As a breathing gas for deep-sea diving and high-altitude flying.
* In cryogenics, to cool materials to extremely low temperatures.
* In spectroscopy, to study the spectra of atoms and molecules.
* In the medical field, as a diagnostic tool and in the treatment of certain diseases.
Helium is studied because it is a very unique element with a number of important properties. It is the only element that remains a liquid at absolute zero. It is also one of the least reactive elements and does not form compounds with other elements under normal conditions. Helium is a valuable resource that is used in a wide range of applications. It is also an important scientific tool that is used to study the fundamental properties of matter.'

Helium: A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. [Medical Subject Headings (MeSH), National Library of Medicine, extracted Dec-2023]

Cross-References

ID SourceID
PubMed CID23987
CHEMBL ID1796997
CHEBI ID30220
CHEBI ID30217
CHEBI ID33681
CHEBI ID33315
MeSH IDM0010005

Synonyms (59)

Synonym
helium-4
CHEBI:30220 ,
helium
atomic helium
helium(0)
CHEBI:30217 ,
e 939
CHEBI:33681 ,
e-939
helium atom
he
[he]
e939
helio
p-helium
hsdb 553
un1963
einecs 231-168-5
o-helium
un1046
helium, compressed [un1046] [nonflammable gas]
7440-59-7
D04420
helium (usp)
helium, >=99.995%
71086-78-7
einecs 275-187-7
CHEMBL1796997
ins no.939
ins-939
helium, compressed
unii-206gf3gb41
helium [usp]
helium, refrigerated liquid (cryogenic liquid)
206gf3gb41 ,
helium, compressed [un1046] [nonflammable gas]
helium, refrigerated liquid (cryogenic liquid) [un1963] [nonflammable gas]
helium [green book]
helium [fcc]
helium [mi]
helium [hsdb]
helium [vandf]
helium [who-dd]
helium [ep monograph]
helium [usp monograph]
helium [mart.]
Q560
DTXSID7036402 ,
DB09155
helium, messer(r) cangas, 99.999%
helium, >=99.999%
chebi:33315
helium (ep monograph)
helium (usp monograph)
helium, usp
dtxcid5016402
(he)
helium (mart.)
helium 4

Research Excerpts

Overview

Helium is a colorless, odorless, monoatomic inert gas. It is used as a lifting gas for air balloons and small airships due to its high level of safety. Helium has a low density, allowing for lower driving pressures and increased carbon dioxide (CO2) diffusion.

ExcerptReferenceRelevance
"Helium is a colorless, odorless, and tasteless inert gas. "( Helium inhalation injuries managed at emergency departments.
Forrester, MB, 2021
)
3.51
"Helium is a chemically inert gas present in atmospheric air that is used in various branches of industry and in medicine. "( Helium suicide - A suffocation or a barotrauma?
Berent, J; Smędra, A; Wochna, K; Łabętowicz, P, 2020
)
3.44
"Helium is a colorless, odorless, monoatomic inert gas."( Neuroprotective effect of helium after neonatal hypoxic ischemia: a narrative review.
Chen, G; Deng, RM; Li, HY; Li, X; Shen, HT; Wang, Z; Wu, DG,
)
1.15
"Helium is a colorless, tasteless, and odorless gas that is used as a lifting gas for air balloons and small airships due to its high level of safety. "( A case of suicide by helium gas.
Endo, H; Ishimaru, N; Kikuchi, H; Kishi, Y; Kurokawa, A; Matsuda, K; Yamamura, E, 2016
)
2.2
"Helium is a noble gas with a low density, allowing for lower driving pressures and increased carbon dioxide (CO2) diffusion. "( Heliox allows for lower minute volume ventilation in an animal model of ventilator-induced lung injury.
Aslami, H; Beurskens, CJ; de Beer, FM; Horn, J; Juffermans, NP; Preckel, B; Vroom, MB, 2013
)
1.83
"Helium is a noble gas whose low density decreases airway resistance. "( [Utility of heliox during treatment of upper airway obstruction secondary to bilateral vocal cord paralysis after thyroidectomy].
Alvarez Escudero, J; Ares Rodríguez, X; Blanco Casais, N; Cortiñas Díaz, J; Masid Gómez, A; San Luis Calo, E, 2009
)
1.8
"Helium is a valuable ergogenic aid when added to HOx for most long-term oxygen therapy-dependent patients with advanced COPD."( Exercise tolerance with helium-hyperoxia versus hyperoxia in hypoxaemic patients with COPD.
Chiappa, G; Machado, MC; Meda, E; Neder, JA; Nery, LE; Nunes, M; Queiroga, F, 2013
)
1.42
"Helium is a nonanesthetic, nontoxic gas without hemodynamic side effects, which induces early and late preconditioning of human endothelium in vivo. "( Helium induces preconditioning in human endothelium in vivo.
Brevoord, D; Hollmann, MW; Nieuwland, R; Oei, GT; Preckel, B; Schlack, WS; Smit, KF; Stroes, ES; Weber, NC, 2013
)
3.28
"Helium is a more efficient cryogen than nitrogen, and for macromolecular data collection at high-flux beamlines will deliver lower temperatures. "( Experiments testing the abatement of radiation damage in D-xylose isomerase crystals with cryogenic helium.
Bunick, GJ; DeWitt, K; Hanson, BL; Harp, JM; Howard, A; Kirschbaum, K; Pinkerton, AA; Schall, CA, 2002
)
1.97
"Helium is a more efficient cryogen than nitrogen and will deliver lower temperatures."( New techniques in macromolecular cryocrystallography: macromolecular crystal annealing and cryogenic helium.
Bunick, GJ; Hanson, BL; Schall, CA, 2003
)
1.26
"Helium is an inert gas that has a very low specific weight and density."( [Medicinal gases: oxygen and heliox].
Martinón Sánchez, JM; Martinón Torres, F; Rodríguez Núñez, A, 2003
)
1.04
"Helium is an inert gas with a very low density (0.18 g/L), which allows it to pass through narrowed passages with less turbulence than nitrogen or oxygen. "( Respiratory controversies in the critical care setting. Should heliox be used for mechanically ventilated patients?
Cheifetz, IM; Hurford, WE, 2007
)
1.78
"Helium is an alternative gas for laparoscopy."( Peritoneal and systemic pH during pneumoperitoneum with CO2 and helium in a pig model.
Bergström, M; Falk, P; Holmdahl, L; Park, PO, 2008
)
1.31
"Helium is an inert gas that among other things is used medically to alleviate the symptoms of airway obstruction, as part of a diving mix in deep-sea diving or as balloon gas. "( Suicidal asphyxiation with helium: report of three cases.
Grassberger, M; Krauskopf, A, 2007
)
2.08
"Helium is an inert gas with unique physical properties that allow it to be used for various respiratory emergencies. "( Helium-oxygen therapy in the emergency department.
Hinchliffe, S; McGee, DL; Wald, DA,
)
3.02
"Helium is an inert gas that, if used for insufflation during laparoscopy, may be followed by less postoperative pain than carbon dioxide (CO2) insufflation, due to a more limited effect on intraabdominal pH and metabolism. "( Helium vs carbon dioxide gas insufflation with or without saline lavage during laparoscopy.
Ackroyd, R; deBeaux, AC; Jamieson, GG; Lafullarde, T; Leong, JY; O'Boyle, CJ; Watson, DI; Williams, JA, 2002
)
3.2

Effects

Helium has a low density, and therefore has an increased flow rate which results in less airway resistance, decreased work of breathing, minimized airway collapse, and less hyperinflation. Helium gas embolism has a greater deleterious effect than CO2 gas Embolism on survival.

Helium insufflation has been used extensively in animal models but only to a limited extent in humans. The helium has no hemodynamic or neurocognitive side effects and can be used as an ideal pre-adaptor for future clinical applications. Helium has a low density and the potential of reducing the work of breathing.

ExcerptReferenceRelevance
"Helium has a low density and the potential of reducing the work of breathing and improving alveolar ventilation when replacing nitrogen in air. "( A double-blind, randomised, controlled Phase II trial of Heliox28 gas mixture in lung cancer patients with dyspnoea on exertion.
Ahmedzai, SH; Laude, E; Robertson, A; Troy, G; Vora, V, 2004
)
1.77
"Helium gas embolism has a greater deleterious effect than CO2 gas embolism on survival, MAP, PETCO2, and PaO2. "( Venous gas embolism--a comparison of carbon dioxide and helium in pigs.
Draper, PN; Phang, PT; Rudston-Brown, B; Walley, KR; Warriner, B, 1997
)
1.99
"Helium has a low density, and therefore has an increased flow rate which results in less airway resistance, decreased work of breathing, minimized airway collapse, and less hyperinflation."( Heliox: a new treatment for life-threatening asthma.
Browne-Heitschmidt, MG; Cassidy, JB,
)
0.85
"Helium has a lower electron scattering cross section than air."( Hypobaric helium atmospheres for light and electron microscopy of mammalian cells.
Kraus, SE; Lyon, NC; Parsons, DF, 1976
)
1.38
"Helium has also been used for committing suicide."( Helium suicide - A suffocation or a barotrauma?
Berent, J; Smędra, A; Wochna, K; Łabętowicz, P, 2020
)
2.72
"The helium has no hemodynamic or neurocognitive side effects and can be used as an ideal pre-adaptor for future clinical applications."( Neuroprotective effect of helium after neonatal hypoxic ischemia: a narrative review.
Chen, G; Deng, RM; Li, HY; Li, X; Shen, HT; Wang, Z; Wu, DG,
)
0.91
"Helium-oxygen has been used for decades as a respiratory therapy conjointly with aerosols. "( Using helium-oxygen to improve regional deposition of inhaled particles: mechanical principles.
Caillibotte, G; Conway, J; Fleming, J; Greenblatt, E; Katz, I; Majoral, C; Martin, A; Montesantos, S; Pichelin, M; Venegas, J, 2014
)
2.33
"Helium, a noble gas, has been used safely in humans. "( Reduction of cardiac cell death after helium postconditioning in rats: transcriptional analysis of cell death and survival pathways.
Alles, LK; Flick, M; Heger, M; Hollmann, MW; Oei, GT; Preckel, B; van der Wal, AC; van Golen, RF; van Gulik, TM; Weber, NC, 2015
)
2.13
"Helium has been shown to provide neuroprotection in mechanical model of acute ischemic stroke by inducing hypothermia, a condition shown by itself to reduce the thrombolytic and proteolytic properties of tissue plasminogen activator. "( Modulation by the Noble Gas Helium of Tissue Plasminogen Activator: Effects in a Rat Model of Thromboembolic Stroke.
Abraini, JH; Blatteau, JE; David, HN; Haelewyn, B; Meckler, C; Risso, JJ; Vallée, N, 2016
)
2.17
"Helium has a low density and the potential of reducing the work of breathing and improving alveolar ventilation when replacing nitrogen in air. "( A double-blind, randomised, controlled Phase II trial of Heliox28 gas mixture in lung cancer patients with dyspnoea on exertion.
Ahmedzai, SH; Laude, E; Robertson, A; Troy, G; Vora, V, 2004
)
1.77
"Helium has different physiochemical properties from previously studied gases, and is a common diluent gas in underwater diving where decompression schedules are based on theoretical models of inert gas kinetics."( Perfusion-diffusion compartmental models describe cerebral helium kinetics at high and low cerebral blood flows in sheep.
Doolette, DJ; Grant, C; Upton, RN, 2005
)
1.29
"Helium has different physiochemical properties from previously studied gases and is a common diluent gas in underwater diving where decompression schedules are based on theoretical models of inert gas kinetics."( Countercurrent compartmental models describe hind limb skeletal muscle helium kinetics at resting and low blood flows in sheep.
Doolette, DJ; Grant, C; Upton, RN, 2005
)
1.28
"Helium has been proposed as a very promising alternative to CO2."( Helium insufflation in laparoscopic surgery.
Bongard, FS; Naude, GP, 1995
)
2.46
"Helium-oxygen has been used to facilitate bronchoscopy through small diameter endotracheal tubes and to increase the effectiveness of high-frequency jet ventilation."( Helium-oxygen therapy in the emergency department.
Hinchliffe, S; McGee, DL; Wald, DA,
)
2.3
"Helium gas embolism has a greater deleterious effect than CO2 gas embolism on survival, MAP, PETCO2, and PaO2. "( Venous gas embolism--a comparison of carbon dioxide and helium in pigs.
Draper, PN; Phang, PT; Rudston-Brown, B; Walley, KR; Warriner, B, 1997
)
1.99
"Helium has a low density, and therefore has an increased flow rate which results in less airway resistance, decreased work of breathing, minimized airway collapse, and less hyperinflation."( Heliox: a new treatment for life-threatening asthma.
Browne-Heitschmidt, MG; Cassidy, JB,
)
0.85
"Helium has its place in treatment of airway obstructions, but more clinical trials are needed to define the indication for symptomatic heliox treatment."( [Symptomatic helium treatment of upper and lower airway obstruction].
Hansen, JJ; Jepsen, SB; Lund, J, 2000
)
1.4
"Helium insufflation has been used extensively in animal models but only to a limited extent in humans."( Helium and other alternative insufflation gases for laparoscopy.
Gupta, A; Neuhaus, SJ; Watson, DI, 2001
)
2.47
"Helium has a lower electron scattering cross section than air."( Hypobaric helium atmospheres for light and electron microscopy of mammalian cells.
Kraus, SE; Lyon, NC; Parsons, DF, 1976
)
1.38
"A helium discharge has been evaluated as an element-selective, gas chromatographic detector for volatile organohalogen compounds. "( Helium discharge detector for quantitation of volatile organohalogen compounds.
Argentine, SM; Rice, GW; Ryan, DA, 1990
)
2.44

Actions

Helium did not cause hypercarbia, acidemia, or pulmonary hypertension despite insufflation under identical conditions. Helium has a lower electron scattering cross section than air.

ExcerptReferenceRelevance
"Helium caused a pH increase up to 7.6."( Impact of laparoscopic gases on peritoneal microenvironment and essential parameters of cell function.
Jacobi, CA; Naundorf, D; Oh, A; Volk, T; Wildbrett, P, 2003
)
1.04
"Helium did not cause hypercarbia, acidemia, or pulmonary hypertension despite insufflation under identical conditions."( Comparative cardiopulmonary effects of carbon dioxide versus helium pneumoperitoneum.
Bongard, FS; Leighton, TA; Liu, SY, 1993
)
1.25
"Helium has a lower electron scattering cross section than air."( Hypobaric helium atmospheres for light and electron microscopy of mammalian cells.
Kraus, SE; Lyon, NC; Parsons, DF, 1976
)
1.38

Treatment

Helium treatment resulted in significantly less apoptosis (TUNEL positive cells/100 pixel 73.5 [60.3-78.6] vs.78.2 [70.4-92.9] P = 0.023). Helium plasma pre-treatment without glycine showed no impact on initial TBS (p>0.348) Helium-neon laser treatment was well-tolerated and reduced the severity of conditioning-induced oral mucositis in BMT patients.

ExcerptReferenceRelevance
"Helium treatment resulted in significantly less apoptosis (TUNEL positive cells/100 pixel 73.5 [60.3-78.6] vs.78.2 [70.4-92.9] P = 0.023). "( Effects of combined helium pre/post-conditioning on the brain and heart in a rat resuscitation model.
Aehling, C; Galmbacher, R; Hollmann, MW; Knapp, J; Popp, E; Preckel, B; Stefan, K; Weber, NC; Zuurbier, CJ, 2018
)
2.25
"Helium plasma pre-treatment without glycine showed no impact on initial TBS (p>0.348). "( Glycine: A potential coupling agent to bond to helium plasma treated PEEK?
Eichberger, M; Schmidlin, PR; Stawarczyk, B, 2016
)
2.13
"Helium-neon laser treatment was well-tolerated and reduced the severity of conditioning-induced oral mucositis in BMT patients."( Helium-neon laser effects on conditioning-induced oral mucositis in bone marrow transplantation patients.
Barasch, A; Clive, J; D'Ambrosio, JA; Franquin, JC; Nuki, K; Peterson, DE; Schubert, MM; Tanzer, JM; Tutschka, P, 1995
)
3.18
"Helium-Neon laser treatment was well tolerated, feasible in all cases, and reduced high dose chemoradiotherapy-induced oral mucositis. "( Low energy Helium-Neon laser in the prevention of oral mucositis in patients undergoing bone marrow transplant: results of a double blind randomized trial.
Cowen, D; Faucher, C; Franquin, JC; Peterson, D; Resbeut, M; Schubert, M; Tardieu, C, 1997
)
2.13
"Helium-neon laser treatment, therefore, may be an effective adjunct to conventional physical therapy of these patients."( Effects of helium-neon laser irradiation on skin resistance and pain in patients with trigger points in the neck or back.
Barry, AJ; Perkins, AI; Snyder-Mackler, L; Soucek, MD, 1989
)
1.39
"Treatment with helium reduced apoptosis in our resuscitation model. "( Effects of combined helium pre/post-conditioning on the brain and heart in a rat resuscitation model.
Aehling, C; Galmbacher, R; Hollmann, MW; Knapp, J; Popp, E; Preckel, B; Stefan, K; Weber, NC; Zuurbier, CJ, 2018
)
1.16
"Treatment with helium ions has been suggested due to their physical and biological advantages."( A novel method for assessment of fragmentation and beam-material interactions in helium ion radiotherapy with a miniaturized setup.
Arico, G; Burigo, LN; Gallas, RR; Gehrke, T; Granja, C; Jakůbek, J; Martišíková, M; Tureček, D, 2017
)
1.02
"Each treatment (helium-oxygen and oxygen-supplemented room air) was given in random order for 15 min after extubation."( Helium-oxygen mixture in the treatment of postextubation stridor in pediatric trauma patients.
Benson, MS; Bishop, MS; Kemper, KJ; Ritz, RH, 1991
)
2.07

Toxicity

No adverse events related to the use of helium occurred during the three hours of administration. Helium was safe for abdominal insufflation and may be the insufflating agent of choice in patients with significant cardiopulmonary disease.

ExcerptReferenceRelevance
" The possible role of the indifferent gas in the toxic effect of oxygen on the animal body is discussed."( [Oxygen toxicity in a mixture with helium].
Donina, ZhA; Troshikhin, GV,
)
0.41
" Helium was safe for abdominal insufflation and may be the insufflating agent of choice in patients with significant cardiopulmonary disease."( The safety of helium for abdominal insufflation.
Dougherty, TB; Feig, BW; Fleming, RY, 1997
)
1.57
" We hypothesized that heliox would provide a safe environment for sustained growth and development."( Growth and development in a heliox incubator environment: a long-term safety study.
Akins, RE; Miller, TL; Shaffer, TH; Singhaus, CJ; Touch, SM; Utidjian, LH, 2007
)
0.34
" RESULTS demonstrated that long-term heliox exposure is safe in this rabbit model."( Growth and development in a heliox incubator environment: a long-term safety study.
Akins, RE; Miller, TL; Shaffer, TH; Singhaus, CJ; Touch, SM; Utidjian, LH, 2007
)
0.34
" No serious adverse events occurred."( Hyperpolarized 3He MR imaging: physiologic monitoring observations and safety considerations in 100 consecutive subjects.
Bartel, ST; Bashir, A; Conradi, MS; Cooper, JD; Gierada, DS; Lefrak, SS; Lutey, BA; Pilgram, TK; Quirk, JD; Tanoli, T; Woods, JC; Yablonskiy, DA, 2008
)
0.35
"Argon cryosurgery offers an effective and safe option for management of advanced hepatic carcinoma, and its combination with other therapeutic approaches may achieve better clinical effects."( [Intraoperative argon cryosurgery in surgical resection of advanced hepatic carcinoma: safety and efficacy].
Fan, YF; Fang, CH; Huang, ZH; Xiang, N; Yang, J, 2008
)
0.35
" As no studies exist on the use of helium in patients after cardiac arrest we investigated whether this is safe and feasible."( Helium ventilation for treatment of post-cardiac arrest syndrome: A safety and feasibility study.
Beurskens, CJ; Binnekade, JM; Brevoord, D; Horn, J; Juffermans, NP; Lagrand, WK; Preckel, B; van den Bergh, WM, 2016
)
2.15
" No adverse events related to the use of helium occurred during the three hours of administration."( Helium ventilation for treatment of post-cardiac arrest syndrome: A safety and feasibility study.
Beurskens, CJ; Binnekade, JM; Brevoord, D; Horn, J; Juffermans, NP; Lagrand, WK; Preckel, B; van den Bergh, WM, 2016
)
2.14
"There were no serious adverse events, but three minor adverse events (2."( Safety of repeated hyperpolarized helium 3 magnetic resonance imaging in pediatric asthma patients.
Cadman, RV; Denlinger, LC; Evans, MD; Fain, SB; Jackson, DJ; Jarjour, NN; Lemanske, RF; Schiebler, ML; Sorkness, RL; Tsuchiya, N, 2020
)
0.84
" A total of 29 intrathoracic adverse events occurred in 24 of the 61 patients."( Efficacy and Safety of Percutaneous Argon-Helium Cryoablation for Hepatocellular Carcinoma Abutting the Diaphragm.
Chen, J; Chen, Q; Du, D; Li, Y; Liang, B; Lyu, J; Mu, F; Wang, Q; Wu, Y; Yang, Y; Zhang, Y, 2020
)
0.82
"Percutaneous argon-helium CA is safe for the treatment of HCC abutting the diaphragm, with acceptable LTP and OS."( Efficacy and Safety of Percutaneous Argon-Helium Cryoablation for Hepatocellular Carcinoma Abutting the Diaphragm.
Chen, J; Chen, Q; Du, D; Li, Y; Liang, B; Lyu, J; Mu, F; Wang, Q; Wu, Y; Yang, Y; Zhang, Y, 2020
)
1.15
" This transition is connected with exponential growth of concentrations of the process participants and with functioning of the key enzyme carbonic anhydrase in development of toxic effects."( Chemical kinetics of the development of coronaviral infection in the human body: Critical conditions, toxicity mechanisms, "thermoheliox", and "thermovaccination".
Bykov, VI; Chuchalin, AG; Panin, AA; Tsybenova, SB; Varfolomeev, SD, 2020
)
0.56
" There were no serious adverse events reported related to the study device or procedure."( Safety and Efficacy of Renuvion Helium Plasma to Improve the Appearance of Loose Skin in the Neck and Submental Region.
Bharti, G; Cohen, S; DiBernardo, B; Gentile, R; Hunstad, J; Kortesis, B; Martinez, A; Ruff, PG; Shridharani, SM, 2023
)
1.19

Compound-Compound Interactions

The objective of this study was to evaluate the effectiveness on argon-helium cryoablation combined with transcatheter arterial chemoembolization (TACE) in treating advanced hepatocellular carcinoma (HCC) and its influence factor.

ExcerptReferenceRelevance
"Hematoporphyrin monomethyl ether (HMME) combined with He-Ne laser irradiation is a novel and promising photodynamic therapy (PDT)-induced apoptosis that can be applied in vitro on canine breast cancer cells."( Hematoporphyrin monomethyl ether combined with He-Ne laser irradiation-induced apoptosis in canine breast cancer cells through the mitochondrial pathway.
Bao, J; Li, H; Liu, Y; Tang, D; Tian, W; Tong, J, 2016
)
0.43
" Previous studies have demonstrated that transcatheter arterial chemoembolization (TACE) combined with argon-helium cryosurgery system (AHCS) can effectively treat liver cancer."( Effect of Transcatheter Arterial Chemoembolization Combined with Argon-Helium Cryosurgery System on the Changes of NK Cells and T Cell Subsets in Peripheral Blood of Hepatocellular Carcinoma Patients.
Bin, H; Huang, M; Wang, X, 2015
)
0.86
"The objective of this study was to evaluate the effectiveness on argon-helium cryoablation combined with transcatheter arterial chemoembolization (TACE) in treating advanced hepatocellular carcinoma (HCC) and its influence factor."( Analysis of therapeutic effectiveness and prognostic factor on argon-helium cryoablation combined with transcatheter arterial chemoembolization for the treatment of advanced hepatocellular carcinoma.
Chen, H; Feng, H; Guo, H; Huang, C; Huang, Y; Tang, Y; Zhuang, W, 2016
)
0.9
"For the treatment of advanced HCC, argon-helium cryoablation combined with TACE is obviously effective and safe."( Analysis of therapeutic effectiveness and prognostic factor on argon-helium cryoablation combined with transcatheter arterial chemoembolization for the treatment of advanced hepatocellular carcinoma.
Chen, H; Feng, H; Guo, H; Huang, C; Huang, Y; Tang, Y; Zhuang, W, 2016
)
0.93
"To investigate the clinical safety and efficacy of argon-helium knife cryoablation combined with nivolumab in the treatment of advanced non-small cell lung cancer (NSCLC), 64 patients with advanced NSCLC were retrospectively reviewed."( The clinical efficacy of argon-helium knife cryoablation combined with nivolumab in the treatment of advanced non-small cell lung cancer.
Feng, J; Guiyu, D; Xiongwen, W, 2021
)
1.15

Bioavailability

Using larger particles and a higher helium pressure, produced an increase in the plasma IDM concentration and the area under the plasma concentration-time curve. The particle kinetic energy, which depended on the particle velocity and particle mass, was increased with increasing helium pressure and particle size.

ExcerptReferenceRelevance
" This low absorption rate could result from diffusion limitation to absorption or countercurrent exchange."( Quantitation of countercurrent exchange during passive absorption from the dog small intestine: evidence for marked species differences in the efficiency of exchange.
Bond, JH; Levitt, DG; Levitt, MD, 1977
)
0.26
" The observed absorption rate of the unbound gases was from two to four times greater than would have been predicted had their entire uptake been accounted for by equilibration with F(co)."( Use of inert gases and carbon monoxide to study the possible influence of countercurrent exchange on passive absorption from the small bowel.
Bond, JH; Levitt, DG; Levitt, MD, 1974
)
0.25
"1 T, 180 degrees RF pulses can be repeated every 10 ms without exceeding specific absorption rate limits, which would not be the case for higher fields."( CPMG measurements and ultrafast imaging in human lungs with hyperpolarized helium-3 at low field (0.1 T).
Bittoun, J; Darrasse, L; Durand, E; Guillot, G; Nacher, PJ; Tastevin, G; Vattolo, D; Vignaud, A, 2002
)
0.54
" Using larger particles and a higher helium pressure, produced an increase in the plasma IDM concentration and the area under the plasma concentration-time curve (AUC) and resultant F (relative bioavailability with respect to intracutaneous injection) of IDM increased by an amount depending on the particle size and helium pressure."( Effects of particle size, helium gas pressure and microparticle dose on the plasma concentration of indomethacin after bombardment of indomethacin-loaded poly-L-lactic acid microspheres using a Helios gun system.
Kobayashi, D; Morimoto, Y; Natsume, H; Sugibayashi, K; Uchida, M, 2002
)
0.89
" Bioavailability and Cmax were also dependent on the helium pressure."( [Transdermal microparticle delivery by a supersonic-Helios gun system].
Jin, Y; Morimoto, Y; Natsume, H; Sugibayashi, K; Uchida, M; Wang, CF, 2001
)
0.56
" Bioavailability and Cmax were also dependent on the helium pressure."( Transdermal microparticle delivery by a supersonic-Helios gun system.
Chao, W; Hideshi, N; Mashaki, U; Yasunori, M; Yi, J, 2004
)
0.57
" Hyperemic reaction, a marker of nitric oxide bioavailability and endothelial function, was determined at 15 and 30 min of reperfusion on the forearm using venous occlusion plethysmography."( Helium breathing provides modest antiinflammatory, but no endothelial protection against ischemia-reperfusion injury in humans in vivo.
Härter, L; Keel, M; Lucchinetti, E; Maurer, C; Wacker, J; Zaugg, K; Zaugg, M, 2009
)
1.8
" The particle kinetic energy, which depended on the particle velocity and particle mass, was increased with increasing helium pressure and particle size, decreasing bombardment dose, resulting in the increased percentage introduction and relative bioavailability (F(0-24 h))."( Relationships between the particle velocity and introduction of drug-loaded microparticles into the skin in a microparticulate bombardment system.
Morimoto, Y; Natsume, H; Seki, T; Uchida, M; Uchida, T, 2011
)
0.58

Dosage Studied

The total gas exchange, body temperature, content of free oxygen in the quadriceps muscle and its changes upon oxygen inhalation of a known dosage (oxygen test) were measured in the Wistar rats during their one-hour exposure to a helium-oxygen atmosphere (21%) at 25 degrees C. Endothelium-dependent and endpoint-independent responses were measured after cumulative dose-response infusion of acetylcholine and sodium nitroprusside.

ExcerptRelevanceReference
" The form of the dose-response curves was different for the two cell-types, and there was an overall difference in radiosensitivity, the human cells being the more sensitive to all radiations."( Inactivation and mutation of cultured mammalian cells by aluminium characteristic ultrasoft X-rays. II. Dose-responses of Chinese hamster and human diploid cells to aluminium X-rays and radiations of different LET.
Cox, R; Goodhead, DT; Thacker, J, 1977
)
0.26
" The duration of sleep, determined by failure of the animals to right themselves, was then used to construct dose-response curves for the two drugs in the hyperbaric environments."( Ketamine and thiopental sleep responses in guinea pigs in hyperbaric helium-oxygen.
Bailey, RC; McCracken, LE; Nicodemus, HF; Tobey, RE, 1979
)
0.49
" The dose-response relationships were not consistently altered by either vagal blockade or vagotomy."( Canine pulmonary response to aerosol histamine: direct versus vagal effects.
Drazen, JM; Ingram, RH; Loring, SH, 1977
)
0.26
" The resulting dose-response curve at pressure gave an ED50 that was 64 per cent larger than the ED50 at 1 atm."( Pressure antagonism of barbiturate anesthesia.
Eger, EI; Smith, M; Smith, RA; Winter, PM, 1976
)
0.26
" A clear-cut dose-response relationship could not be established for P300 amplitude."( P300 latency indexes nitrogen narcosis.
Fowler, B; Pogue, J; Porlier, G, 1990
)
0.28
" VMA dosing in the urine proves to be a sensitive indicator for the assessment of stress and adaptive reactions during saturation."( A dynamic study of vanilmandelic acid elimination in the urine of divers in a dive at 21 ATA in saturation with a helium-oxygen respiratory mixture.
Badiu, G; Mihăianu, TD; Popescu, O,
)
0.34
" Also under examination are the physical properties of narrow heavy-ion beams for improving methods of dose delivery and dose distribution and for establishing clinical RBE/LET and dose-response relationships for human CNS tissues."( Heavy charged-particle Bragg peak radiosurgery for intracranial vascular disorders.
Fabrikant, JI; Frankel, KA; Lyman, JT, 1985
)
0.27
" By use of the maximum likelihood principle, a number of models were fit to data from dose-response and maximum pressure-reduction experiments with both rats and men."( On the likelihood of decompression sickness.
Flynn, ET; Homer, LD; Weathersby, PK, 1984
)
0.27
" Based on a dose-response curve of preflight samples exposed to gamma rays, the absorbed dose received by crews during the mission was estimated to be about 14."( Cytogenetic effects of space radiation in lymphocytes of MIR-18 crews.
Durante, M; Fedorenko, BS; George, K; Johnson, AS; Tavakoli, A; Yang, TC, 1997
)
0.3
" Dose-response curves for noradrenaline and contractions elicited by 120 mM KCl were compared with time-matched experiments performed at atmospheric pressure."( Hyperbaric-induced enhancement of noradrenaline-evoked contraction in rat thoracic aorta.
Guerrero, F; Jammes, Y; Joanny, P; Lucciano, M, 1997
)
0.3
" We observed that under- and overirradiation dosage can result in the absence of positive therapy effects or even opposite, negative (e."( Treatment of medial and lateral epicondylitis--tennis and golfer's elbow--with low level laser therapy: a multicenter double blind, placebo-controlled clinical study on 324 patients.
Simunovic, Z; Trobonjaca, T; Trobonjaca, Z, 1998
)
0.3
" Bethanecol dosing increased inspiratory respiratory resistance (cm H2O/L/min; p < ."( Physiologic implications of helium as a carrier gas for inhaled nitric oxide in a neonatal model of Bethanecol-induced bronchoconstriction.
Greenspan, JS; Miller, TL; Shaffer, TH; Sherman, TI; Singhaus, CJ, 2006
)
0.63
" Endothelium-dependent and endothelium-independent responses were measured after cumulative dose-response infusion of acetylcholine and sodium nitroprusside, respectively, at baseline and after 15 min of reperfusion using strain-gauge, venous occlusion plethysmography."( Helium induces preconditioning in human endothelium in vivo.
Brevoord, D; Hollmann, MW; Nieuwland, R; Oei, GT; Preckel, B; Schlack, WS; Smit, KF; Stroes, ES; Weber, NC, 2013
)
2.31
"Drug dosing in critically ill patients is challenging due to the altered drug pharmacokinetics-pharmacodynamics associated with systemic therapies."( Fundamentals of aerosol therapy in critical care.
Chan, HK; Cohen, J; Dhanani, J; Fraser, JF; Rello, J; Roberts, JA, 2016
)
0.43
[information is derived through text-mining from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Roles (1)

RoleDescription
food packaging gasA food additive that is a (generally inert) gas which is used to envelop foodstuffs during packing and so protect them from unwanted chemical reactions such as food spoilage or oxidation during subsequent transport and storage. The term includes propellant gases, used to expel foods from a container.
[role information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Drug Classes (3)

ClassDescription
noble gas atom
s-block element atom
monoatomic helium
[compound class information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Bioassays (3)

Assay IDTitleYearJournalArticle
AID603951In-vitro air to blood partition coefficients of the compound, logK(blood) (human/rat)2008European journal of medicinal chemistry, Mar, Volume: 43, Issue:3
Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
AID603950In-vitro air to lung partition coefficients of the compound, logK(lung) (human/rat)2008European journal of medicinal chemistry, Mar, Volume: 43, Issue:3
Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
AID603952In-vitro blood to lung partition coefficients of the compound, logP(lung) (human/rat)2008European journal of medicinal chemistry, Mar, Volume: 43, Issue:3
Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
[information is prepared from bioassay data collected from National Library of Medicine (NLM), extracted Dec-2023]

Research

Studies (4,759)

TimeframeStudies, This Drug (%)All Drugs %
pre-19901835 (38.56)18.7374
1990's681 (14.31)18.2507
2000's1078 (22.65)29.6817
2010's973 (20.45)24.3611
2020's192 (4.03)2.80
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Market Indicators

Research Demand Index: 64.48

According to the monthly volume, diversity, and competition of internet searches for this compound, as well the volume and growth of publications, there is estimated to be very strong demand-to-supply ratio for research on this compound.

MetricThis Compound (vs All)
Research Demand Index64.48 (24.57)
Research Supply Index8.59 (2.92)
Research Growth Index4.49 (4.65)
Search Engine Demand Index218.50 (26.88)
Search Engine Supply Index3.76 (0.95)

This Compound (64.48)

All Compounds (24.57)

Study Types

Publication TypeThis drug (%)All Drugs (%)
Trials199 (3.85%)5.53%
Reviews312 (6.03%)6.00%
Case Studies152 (2.94%)4.05%
Observational6 (0.12%)0.25%
Other4,504 (87.07%)84.16%
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]