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10-30-2009, 07:04 PM
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Join Date: Nov 2007
Location: Kitchener Ontario CYKF
Posts: 60
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Oximeter
I just purchase 2 units. $99.00 each. Here is the link http://www.aerox.com/parts.html
Just recieved them and they both read the same so at least calibrated to each other. I purchased my O2 systems from Aerox and they seemed to have it together but I am real new at this.
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07-24-2010, 06:54 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Another inexpensive oximeter source
My wife is a nurse.
She saw one of her workmates using a pocket oximeter and asked about it.
Similar to the posting that started this thread, the unit is under 40 bucks. My wife did a comparison test against the high dollar units supplied by the hospital. A-OK.
The unit is an MD300-CP from Southeastern Medical Supply.
http://www.semedicalsupply.com/
I ordered one so that she could use it for work and also to start getting a baseline for the both of us before we start flying the RV on OX.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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07-24-2010, 08:59 AM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,436
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I've had one for a while now. It's essential. My Aerox O2 system has individual meters and valves and I use the oxymeter to control the flow, keeping my blood O2 level above 90%.
It's interesting to compare the onset of hypoxia to the values the oxymeter shows. Just from that alone, I think the calibration is right on.
One thing worth mentioning is that if you leave the batteries in the unit between flights, they'll rapidly run down. It pulses a beam every second or two to check to see if there's a finger in the unit and that kills the battery in a few days.
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07-24-2010, 01:04 PM
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Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
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Quote:
Originally Posted by David Paule
I've had one for a while now. It's essential. My Aerox O2 system has individual meters and valves and I use the oxymeter to control the flow, keeping my blood O2 level above 90%.
It's interesting to compare the onset of hypoxia to the values the oxymeter shows. Just from that alone, I think the calibration is right on.
One thing worth mentioning is that if you leave the batteries in the unit between flights, they'll rapidly run down. It pulses a beam every second or two to check to see if there's a finger in the unit and that kills the battery in a few days.
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Good tip David.
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07-25-2011, 02:38 PM
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Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
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is there a doctor in the house?
...maybe the experts have already commented, but I have 2 questions....
1. is it 'safe' to say that if your o2 saturation drops below 90%, you should be on supplemental oxygen, regardless of altitude? ( this would encompass those of us with reduced lung function due to allergy, smoking, etc.)
2. since the discount units advertise the same accuracy as the $300 ones ( +- 2%) is there any benefit to paying more than $33 ????
__________________
Perry Y.
RV-9a - SOLD!....
Lake Country, BC
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09-28-2011, 08:03 AM
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Join Date: Sep 2006
Location: STL/3K6
Posts: 399
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Quote:
Originally Posted by flyboy1963
...maybe the experts have already commented, but I have 2 questions....
1. is it 'safe' to say that if your o2 saturation drops below 90%, you should be on supplemental oxygen, regardless of altitude? ( this would encompass those of us with reduced lung function due to allergy, smoking, etc.)
2. since the discount units advertise the same accuracy as the $300 ones ( +- 2%) is there any benefit to paying more than $33 ????
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1: keep Oxygen saturation or SaO2 at 92 or above. Much below 90% and the oxygen carrying of hemoglobin falls off precipitously and physiologic function follows. SaO2 of 80% is far far worse than 90%. Basically 90% should be adequate but 92% gives you some margin for error and you'll feel better too after the flight.
http://www.rnceus.com/oxydiscrv.gif shows how PaO2 falls dramatically when SaO2 approaches 90%. PaO2 is what matters, it's how much oxygen is really in the blood to drive diffusion into the cells. SaO2 is just more easily measured without drawing arterial blood.
Bottom line, find a cheap source of oxygen so you'll use it liberally. I just ordered a tank and plan to use it anytime I'm above 8000 feet which is where I can start seeing significant desaturation.
2: I have no idea, my $35 oxymeter seems to work okay but is a little erratic. Don't know if my SaO2 changes that much or if it's sensitive to vibration, or just too cheap. I'm going to borrow an expensive oxymeter from the hospital and do a side by side comparison. Because SaO2 CAN change dramatically when around 88-92, I wouldn't be too surprised if the readings I'm getting at 10-12k feet are varying as much as I see.
I will say that when I feel mildly hypoxic, the oxymeter is agreeing, so no false negative readings which is good.
__________________
RV-8, Both wings with top skins on
-4 bought flying
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09-28-2011, 08:08 AM
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Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,391
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Grant,
Will be interested to see the side-by-side comparison. Please do post the results here.
greg
__________________
Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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09-28-2011, 08:27 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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The source linked in the first post seems to be selling basic oximeters for even less money now.....selection of meters here:
http://www.medical-monitors.com/tripleoximeters.html
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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09-28-2011, 08:49 AM
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Join Date: Jul 2006
Location: Vul, VA
Posts: 316
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...exercise and O2 saturation...?
Quote:
Originally Posted by Rosie
I'm just home from Yellowstone and used Oxygen going there at 11.5K MSL. I typically am 90-92% saturated to 10.5K MSL and use O2 to keep me above 90% when flying 11.5K or higher. I always use O2 flying at night coming home from any trip regardless of altitude.
I do ride a mountain bike in the desert hills behind Rosamond everyday (7-9 miles) during the week and 20 miles on either Sat or Sun to keep my 50-year-old heart healthy  Rosie
PS: Here's a link to some affordable Pulse Oximeters.
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I (years ago) had the world record for 10k, and was a member of the US Olympic Track and Field team... I currently ride my bike 100-200 mi. a week too, Paul.. imagine my suprise when a doctor told me that this had little bearing on my ability to saturate my blood with O2...! I don't understand it, but I'm no doctor.....
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09-28-2011, 10:18 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Quote:
Originally Posted by flyboy1963
...maybe the experts have already commented, but I have 2 questions....
1. is it 'safe' to say that if your o2 saturation drops below 90%, you should be on supplemental oxygen, regardless of altitude? ( this would encompass those of us with reduced lung function due to allergy, smoking, etc.)
2. since the discount units advertise the same accuracy as the $300 ones ( +- 2%) is there any benefit to paying more than $33 ????
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Yes, I paid way more than $33 (cheap ones were not available then) but my unit has an auto shut-off feature. The battery lasts for years.
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