Search Results - "Conkin, Johnny"

Equivalent Air Altitude and the Alveolar Gas Equation by Conkin, Johnny

“…It is expedient to use normobaric hypoxia (NH) as a surrogate for hypobaric hypoxia (HH) for training and research. The approach matches inspired oxygen…”
Get more information

Modeling a 15-min extravehicular activity prebreathe protocol using NASA׳s exploration atmosphere (56.5kPa/34% O2) by Abercromby, Andrew F.J., Conkin, Johnny, Gernhardt, Michael L.

“…NASA׳s plans for future human exploration missions utilize a new atmosphere of 56.5kPa (8.2psia), 34% O2, 66% N2 to enable rapid extravehicular activity (EVA)…”
Get full text

A Systematic Review and Meta-Analysis of Decompression Sickness in Altitude Physiological Training by Conkin, Johnny, Sanders, Robert W, Koslovsky, Matthew D, Wear, Mary L, Kozminski, Andrew G, Abercromby, Andrew F J

“…A review of decompression sickness (DCS) cases associated with the NASA altitude physiological training (APT) program at the Johnson Space Center (JSC)…”
Get more information

Modeling a 15-min extravehicular activity prebreathe protocol using NASA's exploration atmosphere (56.5kPa/34% O2) by Abercromby, Andrew FJ, Conkin, Johnny, Gernhardt, Michael L

“…NASA's plans for future human exploration missions utilize a new atmosphere of 56.5kPa (8.2psia), 34% O2, 66% N2 to enable rapid extravehicular activity (EVA)…”
Get full text

Venous Gas Emboli and Ambulation at 4.3 psia by Conkin, Johnny, Pollock, Neal W, Natoli, Michael J, Martina, Stefanie D, Wessel, 3rd, James H, Gernhardt, Michael L

“…Ambulation during extravehicular activity on Mars may increase the risk of decompression sickness through enhanced bubble formation in the lower body. walking…”
Get more information

Hypobaric Decompression Sickness Treatment Model by Conkin, Johnny, Abercromby, Andrew F J, Dervay, Joseph P, Feiveson, Alan H, Gernhardt, Michael L, Norcross, Jason R, Ploutz-Snyder, Robert, Wessel, 3rd, James H

“…The Hypobaric Decompression Sickness (DCS) Treatment Model links a decrease in computed bubble volume from increased pressure (ΔP), increased oxygen (O2)…”
Get more information

Hemoglobin Oxygen Saturation with Mild Hypoxia and Microgravity by Conkin, Johnny, Wessel, 3rd, James H, Norcross, Jason R, Bekdash, Omar S, Abercromby, Andrew F J, Koslovsky, Matthew D, Gernhardt, Michael L

“…Microgravity (μG) exposure and even early recovery from μG in combination with mild hypoxia may increase the alveolar-arterial oxygen (O2) partial pressure…”
Get more information

Comments on Point:Counterpoint: Hypobaric hypoxia induces/does not induce different responses from normobaric hypoxia by Girard, Olivier, Koehle, Michael S, MacInnis, Martin J, Guenette, Jordan A, Verges, Samuel, Rupp, Thomas, Jubeau, Marc, Perrey, Stephane, Millet, Guillaume Y, Chapman, Robert F, Levine, Benjamin D, Conkin, Johnny, Wessel, 3rd, James H, Nespoulet, Hugo, Wuyam, Bernard, Tamisier, Renaud, Levy, Patrick, Casey, Darren P, Taylor, Bryan J, Snyder, Eric M, Johnson, Bruce D, Laymon, Abigail S, Stickford, Jonathon L, Weavil, Joshua C, Loeppky, Jack A, Pun, Matiram, Schommer, Kai, Bartsch, Peter, Vagula, Mary C, Nelatury, Charles F

Get full text

PH2O and simulated hypobaric hypoxia by Conkin, Johnny

“…Some manufacturers of reduced oxygen (O2) breathing devices claim a comparable hypobaric hypoxia (HH) training experience by providing F1O2 < 0.209 at or near…”
Get more information

Accuracy of physiological altitude simulation by Conkin, Johnny

Get more information

Decompression sickness after air break in prebreathe described with a survival model by Conkin, Johnny

“…A perception exists in aerospace that a brief interruption in a 100% oxygen prebreathe (PB) by breathing air has a substantial decompression sickness (DCS)…”
Get more information

Risk assessment of physiological effects of atmospheric composition and pressure in Constellation vehicles by Scheuring, Richard, Conkin, Johnny, Jones, Jeffrey A., Gernhardt, Michael L.

“…Introduction: To limit the risk of fire and reduce denitrogenation time to prevent decompression sickness to support frequent extravehicular activities on the…”
Get full text

Probabilistic modeling of hypobaric decompression sickness by Conkin, Johnny

“…I did probabilistic modeling on data from decompressions in altitude chambers as a means to develop safe strategies for decompression of aviators and…”
Get full text

Critique of the equivalent air altitude model by Conkin, Johnny, Wessel, 3rd, James H

“…The adverse effects of hypoxic hypoxia include acute mountain sickness (AMS), high altitude pulmonary edema, and high altitude cerebral edema. It has long been…”
Get more information

Probabilistic modeling of hypobaric decompression sickness by Conkin, Johnny

“…I did probabilistic modeling on data from decompressions in altitude chambers as a means to develop safe strategies for decompression of aviators and…”
Get full text

Role of metabolic gases in bubble formation during hypobaric exposures by Foster, Philip P, Conkin, Johnny, Powell, Michael R, Waligora, James M, Chhikara, Raj S

“…1  Universities Space Research Association, Division of Space Life Sciences, 2  Environmental Physiology Laboratory, Life Sciences Research Laboratories,…”
Get full text

Probability of hypobaric decompression sickness including extreme exposures by Conkin, Johnny, Gernhardt, Michael L, Abercromby, Andrew F, Feiveson, Alan H

“…The fitting of probabilistic decompression sickness (DCS) models is more effective when data encompass a wide range of DCS incidence. We obtained such data…”
Get more information

Protective mechanisms in hypobaric decompression by Foster, Philip P, Pollock, Neal W, Conkin, Johnny, Dervay, Joseph P, Caillot, Nicolas, Chhikara, Raj S, Vann, Richard D, Butler, Bruce D, Gernhardt, Michael L

“…To reduce bubble formation and growth during hypobaric exposures, a denitrogenation or nitrogen "washout" procedure is performed. This procedure consists of…”
Get more information

Air break during preoxygenation and risk of altitude decompression sickness by Pilmanis, Andrew A, Webb, James T, Balldin, Ulf I, Conkin, Johnny, Fischer, Joseph R

“…To reduce the risk of decompression sickness (DCS), current USAF U-2 operations require a 1-h preoxygenation (PreOx). An interruption of oxygen breathing with…”
Get more information

A latent class model to assess error rates in diagnosis of altitude decompression sickness by Conkin, Johnny, Sung, Hsi-Guang, Feiveson, Alan H

“…Prospective testing of denitrogenation protocols to reduce the risk of decompression sickness (DCS) in astronauts requires pre-defined accept and reject…”
Get more information