How can one calculate Blood pressure from pulse rate of heart by sensing veins by finger tips?

Question

In immergency one may not have BP checking appratus then this pulse counting may help.

Answer 1

Its mathmatically impossible to determine the systlic and diastic pressures based on heart rate alone. You can tell if someone is hypotensive (low b/p) when palpating (feeling) their pulses either in their neck or groin and its weak or thready. You can barely feeling it when its really low. There are so many factors in determining a persons blood pressure based on their pulse. Fever, heart rate, ambient temperature, and diseases processes all play a factor in a persons blood pressure. Age and genetics are other factors as well just to name a few. Hope this answers your question.

Answer 2

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Answer 3

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Answer 4

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Well, it would, if the figures you cite were valid, but I'm afraid they don't add up, so you can't. Here's the Doubtfire equation, from which you can, for a given cardiac output, calculate heart rate (HR) from pulse pressures PP alone, this (pulse pressure) being the difference between systolic and diastolic pressure on any occasion :- .................................. HR2 = PP1/PP2 x HR1, meaning that it is possible to calculate heart rate from pressures alone, providing you already have ONE previous set of readings. However, the readings you quote show that the cardiac output on the second occasion was about 70% higher than it was on the first, - so it can't possibly be a reading taken at "rest". The Doubtfire Equation only holds for constant (or nearly so) cardiac output. Small variations in CO give rise to acceptable margins of error in accuracy, -but not ones so large as 70%. If the cardiac output had changed only say 5%, then the calculation would be approximately right, with an accuracy of +/- 5%, and for clinical purposes this is reasonable. In practice, CO doesn't vary that much if the patient is in true REST state. Of course, if you have the values of CO on both occasions then the calculation is 100% accurate, to within +/- 1 bpm. But then you'd use Lowe's Equation instead:- ...............................HR2 = HR1 x CO2/CO1 x PP1/PP2 This copes with any cardiac output, and doesn't require readings to be taken at rest. It can be employed even on treadmill work, or Bruce Protocol readings ................................... I was amused by Will's posting that "Human Physiology is much more complicated than algebra." It isn't, of course. If only algebra were that simple and 'uncomplicated'!! Human physiology follows the mundane laws of science, exactly as all other activities do, and medicine is no exception. It only seems to be more complicated because the algebra of it hasn't properly been worked out.Maybe it never will.... But all physiological function ultimately morphs ineluctably into pure Math. Disappointing, -I know, but true, nevertheless.

Answer 5

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Answer 6

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RE:
How can one calculate Blood pressure from pulse rate of heart by sensing veins by finger tips?
In immergency one may not have BP checking appratus then this pulse counting may help.

Answer 7

would simply add that I agree that this can't be done, but the reason is not mathematical or biological. It is that these measurements describe different phenomena. Blood pressure measures the maximum and minimum pressure generated by your heart forcing blood down the pipes. Pulse describes how often that happens.
Would be like trying to measure how much water flowed out of a dam by only timing how fast someone went when floating on the surface. That would just be part of the answer.

Answer 8

this is not possible, you can calculate your (map) from a blood pressure.......(mean arterial pressure). You can only get a pulse rate by palpating with your fingers, you cant get a blood pressure. However, you can generally tell how well a patient is perfusing their organs by how strong their pulse is. I hope this helps.

Answer 9

These answers are mostly right, but as an ARMY medic for 6 years and a paramedic for 4, I believe i can some what help answer the question your trying to ask, I think ...
You can not get an exact BP (blood pressure) by palpating(feeling) a pulse, how ever you can roughly estimate the systolic pressure ( this is the top number on a BP, this is the pressure in your arteries when your heart contracts) by where you can feel a pulse i.e.

radial pulse(wrist) >90mm/hg
bracial pulse (bicept) >80mm/hg
carotid pulse (neck) >60mm/hg
pedal pulse ( foot) >100mm/hg
femoral pulse (groin) >70mm/hg

so for example if i feel a pulse on someones wrist i know the top number is 90 or above, if i feel a pulse on the neck and not one on the wrist i know the top number is between 90 and 60. if no pulse on the neck the top number is below 60. There is no was to feel a pulse and know what the bottom number is however that can only be done with a bp.
And yes what I have all written is been proven, the military and ambulance personnel have been using this knowledge for years. hope this helps please excuse the spelling.

Answer 10

yes, u can count the pulse but not the blood pressure. or may be a weak pulse is an indicator of lbp