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Title: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Feb 24, 2023 "The International Standard Atmosphere defines what consitutes a "normal" atmosphere. The sea level pressure is defined as 1.01325 bar (29.92 inches of mercury); the sea level temperature is defined as 15° C (59° F); and the temperature decreases at a lapse rate of 6.5° C / km (3.57° F / 1,000 feet). "
Based on this standard, for climbing a mountain, is there any study to show on how much atmospheric pressure drop would starting to effect us? How high should climber play attention on climbing a mountain? Does anyone have any suggestions? Thanks in advance https://ewscripps.brightspotcdn.com/dims4/default/5fc0548/2147483647/strip/true/crop/1920x1080+0+0/resize/2560x1440!/quality/90/?url=http%3A%2F%2Fewscripps-brightspot.s3.amazonaws.com%2Fd8%2F6d%2F6e4bee3e49448ff3c6e40042ff95%2Foxygen-levels.jpg (https://ewscripps.brightspotcdn.com/dims4/default/5fc0548/2147483647/strip/true/crop/1920x1080+0+0/resize/2560x1440!/quality/90/?url=http%3A%2F%2Fewscripps-brightspot.s3.amazonaws.com%2Fd8%2F6d%2F6e4bee3e49448ff3c6e40042ff95%2Foxygen-levels.jpg) Based on sea level, 100% of oxygen, how much % of oxygen drop would alert us? Does anyone have any suggestions? Thanks in advance Pressure drops 50 mb, would this level have any effect on us? "Beyond 2,100 m the oxygen saturation of hemoglobin to form oxyhemoglobin begins to drastically decrease." https://www.technology.org/2019/03/30/is-it-true-that-air-is-21-oxygen-for-most-of-us-not-really/ Would following different level of oxygen level effect Blood oxygen level? oxygen constitutes 21 %. oxygen constitutes 20 %. oxygen constitutes 19 %. oxygen constitutes 18 %. Does anyone have any suggestions? Thanks in advance https://www.youtube.com/watch?v=uUSLvpHi9ZI Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Feb 27, 2023 Hi oemBiology (https://biology-forums.com/index.php?action=profile;u=94679)
The effects of limited oxygen can start to be felt by climbers at altitudes above 2400 meters above sea level. Above 3000 meters, climbers may experience acute mountain sickness, which can include symptoms such as severe headache, vomiting, and difficulty breathing. At even higher altitudes, such as those encountered on Mount Everest, climbers may experience more serious conditions such as high altitude pulmonary edema and high altitude cerebral edema, which can be life-threatening if not treated promptly. Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Feb 28, 2023 Based on sea level, 100% of oxygen (1026mb), Pressure drops 50 mb, oxygen level would drop 5%.
Would the oxygen saturation of hemoglobin to form oxyhemoglobin begins to drastically decrease? Do you have any suggestions? Thank you very much for any suggestions (^v^) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Feb 28, 2023 Are you looking for something like this?
Source: https://www.researchgate.net/publication/323843811_Predictors_of_Failure_in_Infant_Mandibular_Distraction_Osteogenesis Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Mar 1, 2023 For PaO2,
young adults around 90-100 mmHg older adults around 75-85 mmHg https://www.youtube.com/watch?v=GIuoPYhqddE For older adults' PaO2 at 80 mmHg, SaO2 is 95.84, when Pressure drops 50 mb, oxygen level would drop 5%, Would SaO2 drop 5% from 95.84 to 91 as well? Does calculation work this way? Do you have any suggestions? Thank you very much for any suggestions (^v^) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Mar 1, 2023 You're asking is the drop proportional. From the curve provided in my previous post, the relationship is not linear. So my guess is no.
Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Mar 2, 2023 For PaO2 at 100 mmHg, SaO2 is 97.49%
when Pressure drops 50 mb, oxygen level would drop 5%, PaO2 would also drop 5% from 100 to 95 mmHg, so SaO2 level should be 97.25%, correct? Do you have any suggestions? Thank you very much for any suggestions (^v^) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Mar 2, 2023 For PaO2 at 100 mmHg, SaO2 is 97.49% when Pressure drops 50 mb, oxygen level would drop 5%, PaO2 would also drop 5% from 100 to 95 mmHg, so SaO2 level should be 97.25%, correct? Yes, correct Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Mar 3, 2023 When Pressure drops 50 mb, oxygen level would drop 5%,
It seems not making any sence for SaO2 dropping from 97.49% to 97.25% Because PaO2 for older adults around 75-85 mmHg as starting points instead of 100 mmHg Do you have any suggestions on how to correct this math? Thank you very much for any suggestions (^v^) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Mar 3, 2023 Not sure why isn't not making sense? Here's a better graph showing the relationship between PaO2 and SaO2 versus altitude.
(https://biology-forums.com/gallery/46/6_03_03_23_6_53_09.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=46293) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: oemBiology on Mar 4, 2023 Younger adults' PaO2 around 90-100 mmHg.
Older adults' PaO2 around 75-85 mmHg. When Pressure drops 50 mb, oxygen level would drop 5%, Older adults would suffer more than younger adults, because of lower PaO2 75-85 mmHg. Young adults' SaO2 level would drop from 97.49% to 97.25% but how to determine older adults' SaO2 level? as oxygen level drop 5% older adults SaO2 level should be lower than 97.25%, because of lower PaO2 level. (75-85 mmHg.) Do you have any suggestions? Thank you very much for any suggestions (^v^) Title: Re: How much atmospheric pressure drop would starting to effect us? Post by: bio_man on Mar 10, 2023 Hi oemBiology (https://biology-forums.com/index.php?action=profile;u=94679)
This could be possibly what you're looking for (?) |