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Blood pressure measurement: arm circumference and cuff size availability

Eugenia Velludo Veiga1, Edna Aparecida Moura Arcuri, Lyne Cloutier

  • 1Escola de Enfermagem de Ribeirão Preto, Universidade de São Paulo, Brazil. evveiga@eerp.usp.br

Revista Latino-Americana De Enfermagem
|October 13, 2009
PubMed

Insights

Accurate blood pressure (BP) measurement requires correct cuff size. Most inpatients have arm circumferences that do not fit standard BP cuffs, leading to inaccurate readings.

Area of Science:

  • Clinical Medicine
  • Biomedical Engineering
  • Cardiovascular Research

Background:

  • Accurate blood pressure (BP) measurement is crucial for patient care.
  • The American Heart Association (AHA) provides guidelines for appropriate BP cuff size selection based on arm circumference (AC).
  • Standard BP cuffs may not accommodate the wide range of patient arm sizes, potentially compromising measurement accuracy.

Purpose of the Study:

  • To determine the arm circumference (AC) of inpatients.
  • To calculate the appropriate BP cuff width (CW) for these ACs based on AHA recommendations (CW/AC ratio of 0.40).
  • To assess the availability of suitable BP cuff sizes in clinical settings.

Main Methods:

  • Measured the AC of 81 inpatients' right arms.
  • Calculated the required CW for each AC using the AHA 0.40 ratio.
  • Compared calculated CWs to the standard 12 cm wide cuff available in clinics.

Main Results:

  • Patient ACs ranged from 17.5 to 40.5 cm, requiring CWs from 6 to 16 cm.
  • The standard 12x23 cm cuff fit only 17.3% of patients (AC 32.5-34.3 cm).
  • The standard 12 cm wide cuff was unsuitable for 82.7% of patients, risking inaccurate BP readings.

Conclusions:

  • A significant discrepancy exists between available standard BP cuff sizes and the measured ACs of inpatients.
  • The limited availability of diverse BP cuff sizes poses a challenge, leading to frequent use of ill-fitting cuffs.
  • Inappropriate cuff sizes can result in overestimation or underestimation of blood pressure, impacting clinical decisions.

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