Basic Patient Monitoring For Anesthesia Blood Pressure
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Transcript of Basic Patient Monitoring For Anesthesia Blood Pressure
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Dr. Jeffrey Elliot FieldHBSc, D.D.S. , Diplomat of the National
dental Board of Anesthesia,Fellow of The American Dental Society
of Anesthesia
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NIBP blood pressure determination values will vary by as much as 37 mm Hg from the direct arterial values.
This large discrepancy indicates that treatment should never be made based on a single NIBP determination without comparison to an auscultatory blood pressure determination or several consecutive measurements performed by an NIBP monitor.
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Cuff width = 40% of arm circumference in order to obtain a proper reading.
American Heart Association recommended sizes for blood pressure cuffs based on arm circumference.
Extremity circumference* (cm) Cuff name 5 - 7.5 Newborn 7.5 – 13 Infant 13 – 20 Child 17 – 25 Small adult 24 – 32 Adult 32 – 42 Large Adult 42 – 50 Thigh
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Using a cuff that is too small will lead to falsely high readings.
Using a cuff that is too large will lead to falsely low readings.
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Several circumstances can prevent accurate determination of blood pressure with NIBP devices. Highly irregular or rapid cardiac rhythms. Excessive patient movement such as
shivering, restlessness, or external movement such as that from a helicopter, ambulance transport, or a rapid cycling ventilator can interfere with detection of cardiac oscillations by the NIBP monitor.
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Adverse health effects associated with high blood pressure are stroke, heart attack, kidney failure or heart failure .
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systolic diastolic
Desirable 115 75
Pre-hypertension 120-139 80-89
Hypertension stage one
140-159 90-90
Hypertension stage two
160-or over 100 or over
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The generally acceptable blood pressure fluctuation under sedation or general anesthesia is: + or -20% of the baseline.