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#21
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Tim Traynor wrote:
John and Eric are right about pre-breathing preventing decompression sickness (precipitation of N2 in fluids and joints due to decreased solubility at altitude) but it does not prevent hypoxia, Even worse: Pure oxygen is poisonous at atmospheric pressure and should not be breathed over an extended time. You'll find more about this in advanced scuba diving books. Stefan |
#22
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COLIN LAMB wrote:
Since I do not live on top of a cliff, I need to launch my sailplane. One of the methods I use is self-launch, in which case I have an engine in front of me. Nothing beats one of those small, cheap CO indicators which you can stick on the panel, then. Stefan |
#23
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First off, let me say I think the Pulse oximiter can be a useful tool to
anyone who is flying at altitudes and using supplemental oxygen....I also looked into these low cost Pulse Oximiters. What I am finding with more checking is that some have popped up on the market that have been reported as poor quality knock-offs, typically, made in China and may not be totally accurate with their readings...Nonin, the company that produces the Finger Pulse Oximiters that I do offer I have also been told has a lawsuit out on one of these companies that is producing an exact knock-off in China and even has the Nonin name on it.... just to note of caution.. tim www.wingsandwheels.com "Ray Lovinggood" wrote in message ... I've not flown in wave, yet, but I would guess the cockpit could get rather cold. The spec sheet for this oximeter shows the operating range from 39 degrees F to 109 degrees F. Can cockpit temps drop lower than 39 F at oxygen altitudes? Ray Lovinggood Carrboro, North Carolina USA |
#24
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tango4 wrote:
"Eric Greenwell" wrote in message ... Bill Daniels wrote: Pulse oxymeters need warm fingers with a good blood flow to get a reading. Clip on units like this require that you remove a glove to use it - not a good idea in a wave. I'd pass. I use a Nonin earlobe clip on a flylead connected to a panel mounted unit. The sensor can be worn under a hat or balaclava so the sensor and my ears stay warm. Less interference with controls and can 'fit and forget' for the whole flight. This sounds very interesting - what model is it? Does the clip ever become uncomfortable during a 5 or 6 hour flight? I've had couple warnings about this possibily from health workers that use them on patients. -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA |
#25
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Tim Mara wrote:
First off, let me say I think the Pulse oximiter can be a useful tool to anyone who is flying at altitudes and using supplemental oxygen....I also looked into these low cost Pulse Oximiters. What I am finding with more checking is that some have popped up on the market that have been reported as poor quality knock-offs, typically, made in China and may not be totally accurate with their readings...Nonin, the company that produces the Finger Pulse Oximiters that I do offer I have also been told has a lawsuit out on one of these companies that is producing an exact knock-off in China and even has the Nonin name on it.... just to note of caution.. The one I mentioned is approved by the FDA and requires a prescription to purchase. Counterfeits are a concern for any brand, as Tim points out, so I would suggest buying your oximeter (Nonin or whatever brand) from a well-known dealer, and not on eBay! As far as the prescription is concerned, most of us can easily get one from a physician friend, I think, or they might even be willing to purchase it for you, as they can sometimes get a discount. The Nonin units like Tim sells are not approved for medical use, which is why it doesn't require a prescription. -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA |
#26
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"Eric Greenwell" wrote in message ... This sounds very interesting - what model is it? Does the clip ever become uncomfortable during a 5 or 6 hour flight? I've had couple warnings about this possibily from health workers that use them on patients. -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA I'm using a Nonin OEM system which talks to an 8 bit microprocessor. The micro mixes the PulseOX and Pulserate data with the data from my LX1600/Colibri combination into a new NMEA stream so that it is available to my PDA. The PDA can then display O2 levels and raise an alarm if it gets low. I can also log the data to a file. I'm hoping to talk the Mobile SeeYou team into supporting the data stream too. The clip does get a little uncomfortable occasionally but it's simple to move it a little or even change ears! A 2 line 8 character display also displays data. and LEDs indicate brakes unlocked and wheel down. This winter I'm adding flap position sense and display and an electronic Flap drag meter to the instrument. Ian |
#27
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Ian:
Neat! Do you have a picture of the OEM oximeter module installation and how the probe cable is routed. I've been looking at the Nonin Bluetooth device and a Bluetooth enabled PDA as a way of doing the same thing without the cable. An added benefit would be that the module could be inside the clothing, which solves the temperature issue. Add a cheap digital pressure sensor and you could monitor your O2 supply as well as the saturation. Ray Warshaw 1LK I'm using a Nonin OEM system which talks to an 8 bit microprocessor. The micro mixes the PulseOX and Pulserate data with the data from my LX1600/Colibri combination into a new NMEA stream so that it is available to my PDA. The PDA can then display O2 levels and raise an alarm if it gets low. I can also log the data to a file. |
#28
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Raphael Warshaw wrote:
I'm using a Nonin OEM system which talks to an 8 bit microprocessor. The micro mixes the PulseOX and Pulserate data with the data from my LX1600/Colibri combination into a new NMEA stream so that it is available to my PDA. The PDA can then display O2 levels and raise an alarm if it gets low. I can also log the data to a file. Ian: Neat! Do you have a picture of the OEM oximeter module installation and how the probe cable is routed. I've been looking at the Nonin Bluetooth device and a Bluetooth enabled PDA as a way of doing the same thing without the cable. An added benefit would be that the module could be inside the clothing, which solves the temperature issue. Add a cheap digital pressure sensor and you could monitor your O2 supply as well as the saturation. SPO Medical lists a Bluetooth oximeter to connect with a PDA on their web site, but I'm unable to find a vendor or much information for it. -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA |
#29
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John and Eric are right about pre-breathing preventing decompression
sickness (precipitation of N2 in fluids and joints due to decreased solubility at altitude) but it does not prevent hypoxia, Even worse: Pure oxygen is poisonous at atmospheric pressure and should not be breathed over an extended time. You'll find more about this in advanced scuba diving books. Stefan Yes, when I was in school there was a lab in my department that showed a hyperoxic environment (100% O2 for 24 hrs) can induce severe airway epithelial damage and used such a model to study how the epithelium responds to injury. Tim |
#30
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"Eric Greenwell" wrote in message ... Tim Mara wrote: The Nonin units like Tim sells are not approved for medical use, which is why it doesn't require a prescription. But it is apparently the same unit that they DO sell for medical use, the only difference being the label and the intended use. I have seen the aviation and medical versions of the Nonin instrument side-by-side and they look and operate exactly the same. We purchased our Nonin Flitestat (AKA Onyx) primarily for non-aviation use, and find it to be an amazing device. I have only tried it in the cockpit once, but was disappointed in the difficulty/impossibility of reading the LED display in bright sunlight. Are you old enough to remember LED wris****ches? Same deal. The same unit with an LCD display would be much better for soaring use. Vaughn |
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