An ultrasound look at Korotkoff sounds
| Autor: | Jean Triboulet, Michel Dauzat, Sarah Coudray, Amir Benmira, Jeremy Laurent, Iris Schuster, Isabelle Aichoun, Antonia Perez-Martin, Fethi Bereksi-Reguig, Florent Veye, Nicolas Berron |
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| Přispěvatelé: | Centre Hospitalier Universitaire de Nîmes (CHU Nîmes), Caractéristiques féminines des dysfonctions des interfaces cardio-vasculaires (EA 2992), Université Montpellier 1 (UM1)-Université de Montpellier (UM), Robotique mobile pour l'exploration de l'environnement (EXPLORE), Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier (LIRMM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) |
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Brachial Artery Pulse Wave Analysis Acoustics 0206 medical engineering Blood Pressure 02 engineering and technology 030204 cardiovascular system & hematology Assessment and Diagnosis 03 medical and health sciences symbols.namesake Duplex doppler ultrasonography 0302 clinical medicine Internal Medicine Humans Medicine Korotkoff sounds Pulse wave velocity Advanced and Specialized Nursing Ultrasonography Doppler Duplex business.industry Turbulence Ultrasound General Medicine Middle Aged 020601 biomedical engineering Flow (mathematics) symbols Female [SDV.IB]Life Sciences [q-bio]/Bioengineering Cardiology and Cardiovascular Medicine business [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing Doppler effect Blood Flow Velocity |
| Zdroj: | Blood Pressure Monitoring Blood Pressure Monitoring, Lippincott, Williams & Wilkins, 2017, 22 (2), pp.86-94. ⟨10.1097/MBP.0000000000000231⟩ |
| ISSN: | 1359-5237 |
| DOI: | 10.1097/mbp.0000000000000231 |
| Popis: | The aim of this study was to analyze the temporal relationships between pressure, flow, and Korotkoff sounds, providing clues for their comprehensive interpretation.When measuring blood pressure in a group of 23 volunteers, we used duplex Doppler ultrasonography to assess, under the arm-cuff, the brachial artery flow, diameter changes, and local pulse wave velocity (PWV), while recording Korotkoff sounds 10 cm downstream together with cuff pressure and ECG.The systolic (SBP) and diastolic (DBP) blood pressures were 118.8±17.7 and 65.4±10.4 mmHg, respectively (n=23). The brachial artery lumen started opening when cuff pressure decreased below the SBP and opened for an increasing length of time until cuff pressure reached the DBP, and then remained open but pulsatile. A high-energy low-frequency Doppler signal, starting a few milliseconds before flow, appeared and disappeared together with Korotkoff sounds at the SBP and DBP, respectively. Its median duration was 42.7 versus 41.1 ms for Korotkoff sounds (P=0.54; n=17). There was a 2.20±1.54 ms/mmHg decrement in the time delay between the ECG R-wave and the Korotkoff sounds during cuff deflation (n=18). The PWV was 10±4.48 m/s at null cuff pressure and showed a 0.62% decrement per mmHg when cuff pressure increased (n=13).Korotkoff sounds are associated with a high-energy low-frequency Doppler signal of identical duration, typically resulting from wall vibrations, followed by flow turbulence. Local arterial PWV decreases when cuff pressure increases. Exploiting these changes may help improve SBP assessment, which remains a challenge for oscillometric techniques. |
| Databáze: | OpenAIRE |
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