The most fascinating thing is that, aside from invasive blood pressure readings (using a catheter inserted in your artery), Korotkoff's method is the basis for modern day oscillometric and auscultatory blood pressure monitoring using digital blood pressure monitors. Auscultatory method involves a microphone within the cuff which listens to the turbulence (Korotkoff) sounds, whereas oscillliometric blood pressure monitors detect the pressure changes caused by the turbulence sounds to measure the point at which they appear and end!
+Accutension You've got some very suspect facts and figures on your website. The vast majority of BPM's are clinically validated and most have a tolerance level of between +/-3mmHg and +/-5mmHg. What is the tolerance on your device? Where is the validation study? Is it CE marked?
The accuracy +/-3mmHg is not blood pressure; it is the tolerance of the pressure sensor. This is misleading. The validation protocol is misleading and actually very loose because the standard deviation (Sigma) can be as large as 7~8mmHg. If we use 3Sigma as a criteria, the error is above 20mmHg. This is consistent with research data. Accutension is totally equivalent to auscultatory method used by doctors and the only criterion is the sounds. The only difference is real time auscultation or record first and auscultate later. It is not a fully automatic device, so no so-called validation study is needed. Does traditional sphygmomanometer need a validation?
I've been measuring blood pressures for more than fourteen years, but I never understood the mechanism behind the sounds I hear until now. Smart people FTW!!
There's no "specific number." It depends on your baseline blood pressure. An "expected" blood pressure for an adult would be 120/80. but you'd pump the cuff up to around 150, then auscultate for the systolic, then diastolic
Interesting I never realized that during this procedure the blood flow to my hand is temporarily blocked. I wonder how long my hand will be able to move or feel without blood? Im certainly not going to try something as dangerous as this just to find out :)
Amazing, now I can understand a litter more. I am an Engineer and it is amazing how the fluid mechanics work in our bodies.
I had absolutely no idea. Amazing. Genius.
Once again, Khan Academy makes it easy to learn! Great teacher :) thank you!!
Great job King Khan for hiring a good teacher.
The most fascinating thing is that, aside from invasive blood pressure readings (using a catheter inserted in your artery), Korotkoff's method is the basis for modern day oscillometric and auscultatory blood pressure monitoring using digital blood pressure monitors.
Auscultatory method involves a microphone within the cuff which listens to the turbulence (Korotkoff) sounds, whereas oscillliometric blood pressure monitors detect the pressure changes caused by the turbulence sounds to measure the point at which they appear and end!
xcallyx These two methods are not equivalent. Here is a comparison @ accutension.com
+Accutension You've got some very suspect facts and figures on your website. The vast majority of BPM's are clinically validated and most have a tolerance level of between +/-3mmHg and +/-5mmHg.
What is the tolerance on your device? Where is the validation study? Is it CE marked?
The accuracy +/-3mmHg is not blood pressure; it is the tolerance of the pressure sensor. This is misleading. The validation protocol is misleading and actually very loose because the standard deviation (Sigma) can be as large as 7~8mmHg. If we use 3Sigma as a criteria, the error is above 20mmHg. This is consistent with research data. Accutension is totally equivalent to auscultatory method used by doctors and the only criterion is the sounds. The only difference is real time auscultation or record first and auscultate later. It is not a fully automatic device, so no so-called validation study is needed. Does traditional sphygmomanometer need a validation?
Have known how to measure pressure for years and this is when I’m just learning the actual principle behind it 🥲
I've been measuring blood pressures for more than fourteen years, but I never understood the mechanism behind the sounds I hear until now.
Smart people FTW!!
Beauty
Amazing explanation! Thank you!
Awesome video. Thankyou
Awesome Video; Well Put Together
There's no "specific number." It depends on your baseline blood pressure. An "expected" blood pressure for an adult would be 120/80. but you'd pump the cuff up to around 150, then auscultate for the systolic, then diastolic
Not many guys exists with this knowledge.
I hope you could expand the topic to how to differentiate these two sound waves through the stethoscope.
Great explanation
thanks
so well explained it..thanks.
Excellent, thank you.
thanks so much!
Interesting I never realized that during this procedure the blood flow to my hand is temporarily blocked. I wonder how long my hand will be able to move or feel without blood? Im certainly not going to try something as dangerous as this just to find out :)
So when you get your blood pressure measured, what number does the pump have to be on?
thanks superb!
BORIS.... IS INVICIBLEEEE
I made a Korean Translation on this Video Hurray!
i came here for Korotkoff's phases...1-5
Darya Palenyy Have you ever thought record Korotkoff sounds on your phone? Here is how it works @ accutension.com
5 years later😂
Same...
first