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Doppler ultrasonography measurement of hepatic hemodynamics during Valsalva maneuver: healthy volunteer study
Ultrasonography ; : 32-38, 2015.
Artigo em Inglês | WPRIM | ID: wpr-731117
ABSTRACT

PURPOSE:

The aim of our study was to assess the hemodynamic change of liver during the Valsalva maneuver using Doppler ultrasonography.

METHODS:

Thirty healthy men volunteers were enrolled (mean age, 25.5+/-3.64 years). The diameter, minimal and maximal velocities, and volume flow of intrahepatic inferior vena cava (IVC), middle hepatic vein (MHV), and right main portal vein (RMPV) was measured during both rest and Valsalva maneuver. These changes were compared using paired t-test.

RESULTS:

The mean diameters (cm) of the intrahepatic IVC at rest and Valsalva maneuver were 1.94+/-0.40 versus 0.56+/-0.66 (P<0.001). The mean diameter (cm), minimal velocity (cm/sec), maximal velocity (cm/sec), and volume flow (mL/min) of MHV at rest and Valsalva maneuver were 0.60+/-0.15 versus 0.38+/-0.20 (P<0.001), -7.98+/-5.47 versus 25.74+/-13.13 (P<0.001), 21.34+/-6.89 versus 35.12+/-19.95 (P=0.002), and 106.94+/-97.65 versus 153.90+/-151.80 (P=0.014), respectively. Those of RMPV at rest and Valsalva maneuver were 0.78+/-0.21 versus 0.76+/-0.20 (P=0.485), 20.21+/-8.22 versus 18.73+/-7.43 (P=0.351), 26.79+/-8.85 versus 24.93+/-9.91 (P=0.275), and 391.52+/-265.63 versus 378.43+/-239.36 (P=0.315), respectively.

CONCLUSION:

The blood flow velocity and volume flow of MHV increased significantly during Valsalva maneuver. These findings suggest that hepatic vein might play an important role to maintain venous return to the heart during the maneuver.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Veia Porta / Veia Cava Inferior / Voluntários / Velocidade do Fluxo Sanguíneo / Manobra de Valsalva / Ultrassonografia Doppler / Voluntários Saudáveis / Coração / Hemodinâmica / Veias Hepáticas Limite: Humanos / Masculino Idioma: Inglês Revista: Ultrasonography Ano de publicação: 2015 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Veia Porta / Veia Cava Inferior / Voluntários / Velocidade do Fluxo Sanguíneo / Manobra de Valsalva / Ultrassonografia Doppler / Voluntários Saudáveis / Coração / Hemodinâmica / Veias Hepáticas Limite: Humanos / Masculino Idioma: Inglês Revista: Ultrasonography Ano de publicação: 2015 Tipo de documento: Artigo