14.13
Considérations particulières lors de la mesure de la tension artérielle
Lors de l’évaluation de la tension artérielle (TA), les professionnels de la santé doivent prendre en compte divers facteurs et résultats inattendus p…
Tenez compte des aspects suivants lors de la mesure de la pression artérielle ou de la tension artérielle.
Lors d’une évaluation initiale, évaluez la tension artérielle dans les deux bras. La valeur systolique peut différer de 10 mmHg. Pour les évaluations ultérieures, utilisez le bras avec la lecture de PA la plus élevée.
Lorsque la pression artérielle est élevée, réévaluez les autres extrémités pour comparer les résultats. Vérifiez également la position du patient, la taille du brassard, l'emplacement du stéthoscope et la précision de l'équipement.
Évaluez les symptômes hypertensifs tels que les rougeurs faciales, les maux de tête, l’épistaxis et la fatigue.
Lorsque la pression artérielle est basse, comparez la valeur avec la ligne de base, limitez les activités qui pourraient abaisser la tension artérielle et placez le patient en position couchée pour augmenter la circulation.
Évaluez les signes d’hypotension comme la tachycardie, les étourdissements et la peau pâle ou cyanosée.
De plus, évaluez les facteurs contribuant à l’hypotension, notamment l’hémorragie, l’hyperthermie et les effets secondaires des médicaments.
Si vous ne parvenez pas à obtenir une tension artérielle, utilisez une autre extrémité ou une autre méthode comme la palpation ou l’échographie Doppler.
Levez le bras avec le brassard au-dessus de la tête pendant trente secondes avant de revérifier la tension artérielle. Ensuite, gonflez le brassard et abaissez doucement le bras tout en le soutenant.
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Q1: Why should blood pressure be measured in both arms during initial assessment?
Measuring blood pressure in both arms during initial assessment allows comparison of systolic values, which may differ by 5-10 mm Hg between arms. For all subsequent assessments, use the arm with the higher reading to ensure consistency and detect potential vascular abnormalities that could affect patient care decisions.
Q2: What should you do if blood pressure readings are abnormally high?
When blood pressure is elevated, reassess in other extremities to compare findings and verify accuracy. Check patient position, cuff size, stethoscope placement, and equipment accuracy. Assess for hypertensive symptoms including facial flush, headache, epistaxis, and fatigue. Document findings and report abnormal results to the care provider.
Q3: How does patient positioning affect blood pressure measurements?
Diastolic pressure is approximately 5 mm Hg higher when measured in a sitting position compared to supine. Systolic pressure is about 8 mm Hg higher in sitting versus supine position. Standardizing patient position ensures accurate, comparable readings and prevents misinterpretation of blood pressure values across assessments.
Q4: What interventions enhance weak or inaudible Korotkoff sounds?
Raise the patient's arm with the cuff overhead for thirty seconds before rechecking blood pressure. Inflate the cuff and gently lower the arm while supporting it. This technique reduces vascular volume and improves blood flow, enhancing Korotkoff sounds for clearer auscultation during assessment blood pressure procedures.
Q5: What is an auscultatory gap and why is it clinically important?
An auscultatory gap is a brief disappearance of Korotkoff sounds between systolic and diastolic pressures during cuff deflation, indicating vascular stiffness. To obtain accurate readings, palpate the radial artery and increase cuff pressure above the disappearance of the pulse before auscultating. Document the auscultatory gap to prevent future measurement errors.
Q6: How should you respond to abnormally low blood pressure readings?
Compare low blood pressure values with the patient's baseline and restrict activities that could lower blood pressure further. Place the patient in a supine position to increase circulation. Assess for hypotension signs including tachycardia, dizziness, and pale or cyanotic skin, and investigate contributing factors like hemorrhage, hyperthermia, or medication side effects.
Q7: When should alternative blood pressure measurement methods be used?
If unable to obtain blood pressure using standard methods, use another extremity or alternative techniques like palpation or assessing blood pressure using a doppler ultrasound. Electronic devices are not advisable for patients with irregular heart rates, tremors, or inability to keep extremities still. Select measurement methods based on individual patient characteristics and clinical presentation.