What is difference between Palpatory and auscultatory methods?

What is difference between Palpatory and auscultatory methods?

The first method is named the palpatory method, which records the pressure at which the subject feels the first pulse in the artery. The second method is the auscultatory method, in which the researcher detects the pulse by listening via a stethoscope placed in the antecubital fossa over the brachial artery.

Why is Palpatory method done before auscultatory method?

Identification of systolic blood pressure by palpatory method helps one to avoid a lower systolic reading by auscultatory method if there is an auscultatory gap. It also minimizes the discomfort of over inflating the bladder of the cuff.

What is Palpatory method?

In this method the cuff is inflated to a level above arterial pressure (as indicated by obliteration of the pulse). As the cuff is gradually deflated, the pressure is noted at which sounds produced by the arterial pulse waves (Korotkoff sounds) appear and disappear again as flow through the artery resumes.

What are the two main methods of recording blood pressure?

There are three commonly used methods for measuring blood pressure for clinical purposes: clinic readings, self-monitoring by the patient at home, and 24-hour ambulatory readings. Self-monitoring is generally carried out using electronic devices that work on the oscillometric technique.

Is Palpatory method accurate?

The novelty of this study is that the newer palpatory method for both SBP and DBP was applied and tested in larger study population (sample size 400) and found to be reliable in 67.5% of subjects recording the exactly same reading.

What causes Auscultatory gap?

There is evidence that Auscultatory Gaps are related to carotid atherosclerosis, and to increased arterial stiffness in hypertensive patients. This appears to be independent of age. Another cause is believed to be venous stasis within the limb that is being used for the measurement.

Why is the auscultatory gap important?

The presence of an auscultatory gap during manual BP measurement—the temporary disappearance of the Korotkoff sounds during cuff deflation—leads to a potentially important underestimate of systolic BP if undetected.

What does the auscultatory gap indicate?

An auscultatory gap, also known as the silent gap, is a period of diminished or absent Korotkoff sounds during the manual measurement of blood pressure. It is associated with reduced peripheral blood flow caused by changes in the pulse wave.

Why is there an auscultatory gap?

There is evidence that auscultatory gaps are related to carotid atherosclerosis, and to increased arterial stiffness in hypertensive patients. This appears to be independent of age. Another cause is believed to be venous stasis within the limb that is being used for the measurement.

What is the sound of korotkoff?

Korotkoff sounds are generated when a blood pressure cuff changes the flow of blood through the artery. This sound provides the systolic pressure reading. Phase 2: A swishing/whooshing sound. Swishing sounds as the blood flows through blood vessels as the cuff is deflated. Phase 3: A thump (softer than phase 1).

What are the 5 Korotkoff sounds?

Korotkoff sounds (or K-Sounds) are the “tapping” sounds heard with a stethoscope as the cuff is gradually deflated. Traditionally, these sounds have been classified into five different phases (K-1, K-2, K-3, K-4, K-5) and are shown in the figure below.

How do you find the auscultatory gap?

To avoid missing an auscultatory gap, the radial artery should be palpated while the cuff pressure is rapidly increased to a level of 30 mmHg above the disappearance of the pulse, followed by auscultation for the Korotkoff sounds during slow deflation of cuff pressure at 2-3 mmHg/second [2].

What is the auscultatory method?

The auscultatory method is based on the detection of Korotkoff sounds issued from the acoustic transudcer signal. Its main advantages are (1) similarities with usual clinical measurement of BP; and (2) accurate detection of systolic and diastolic pressures on the appearance and disappearance of sounds.

What is the auscultatory method of blood pressure measurement?

The auscultatory method is based on the detection of Korotkoff sounds issued from the acoustic transudcer signal. Its main advantag … Two methods of indirect blood pressure (BP) measurement are currently used for ambulatory blood pressure measurement (ABPM): the auscultatory and oscillometric methods.

What are the advantages of palpatory method of blood pressure measurement?

Conclusion: The palpatory method would be very useful where frequent blood pressure measurement are being done manually like in wards, in busy OPD, patient on treadmill and also whenever stethoscope is not available. The blood pressure can be measured in noisy environment too.