Sphygmography - reading and preparation for the procedure,

Contents:

1. When appointed?

2. Contraindications

3. How to prepare?

sphygmography (SG) - a non-invasive method of graphic research vessel walls vibrations caused by the passage of the pulse wave at him.It is used for the diagnosis of valvular heart disease and other disorders of the cardiovascular system.There are three-dimensional and direct sphygmography.

When volume sphygmography using cuff performed registration of volumetric changes of the subject area of ​​the body (the lower leg or thigh, shoulder, forearm), caused by the passage in his arteries pulse wave.

When direct sphygmography using the special funnel (pelleautier) holds registration oscillations in a limited section of the artery wall, resulting from the passage of the pulse wave on it.

Thus sphygmography volume used when measuring arterial pulse oscillations at different wall levels limbs and helps direct sphygmography register pulsation of arteries in certain points, which are amenable to palpation (femoral, car

otid, radial).

Forms sphygmograms recorded from different arteries, have some differences.This is due to:

  • unequal values ​​of intravascular pressure;
  • various caliber arteries;
  • uneven tension of the vascular wall at different sites of the arterial system.

therefore to distinguish between peripheral and central sphygmogram.The former include sphygmogram the aortic arch, subclavian and carotid arteries.The second group - the femoral and radial artery, as well as volume sphygmogram limbs (upper and lower).

procedure for registration of pulse oscillation is carried out as follows: The patient is in a comfortable position.His skin at the site of the vessel pulsation, for example, the radial artery, is set pezokristallichesky, capacitive or strain gauge.During the study, the mechanical vibrations of the walls of blood vessels and arteries are caught by the sensor are converted into electrical signals and transmitted to the recording device, which builds from the curve (sphygmograms) findings.The electrocardiograph can be used as a recorder of these signals.In assessing this curve, experts pay attention to its amplitude, form, rhythm, the slope of the rise and fall times.The procedure lasts about 10 minutes.

When he appointed?

sphygmography used as an independent method of diagnosis or part of the other methods, for example, and mehanokardiografii polikardiografii.As an independent method sphygmography used for the diagnosis of certain pathologies, particularly valvular heart defects, the analysis of the arterial walls (the shape and amplitude of the SG, pulse wave velocity), non-invasive cardiac stroke volume calculation method Wetzler - Beger.

reflexologist use this technique to find the most effective points of impact on the human body.

Contraindications Absolute contraindications to sphygmography absent.Relative contraindications are severe atherosclerosis and stressful situation.This is because the diagnosis does not give meaningful results.In general, the method is absolutely safe and does not cause complications.

How to prepare?

Special training to perform sphygmography not required.The most effective to diagnose in the morning.The patient should sleep well.On the appointed day, the study recommended to be eaten a light breakfast, not containing products with caffeine (energy drinks, chocolate, tea).

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