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Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
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8  The Digestive System Organ Scanning

233

 

 

1.15\ Longitudinal Scanning of the Liver Through the Middle Hepatic Vein on Subxiphoid

Fig. 8.15  Longitudinal scanning of the liver through the middle hepatic vein on subxiphoid

RL

CHD

RHD

RPV

MHV

Gb

PH

IVC

234

M. Zhang

 

 

1.15.1\ Scanning Method

The patient should be on fast for 8–12 h and take a supine position. Probe is sagittally obliquely put to the subxiphoid toward slightly right posteriorsuperior with an oblique angle about 15–20°.

1.15.2\ Section Structure

The longitudinal view of the middle hepatic vein including its segment of draining into the inferior vena cava. The liver parenchyma near the second porta hepatis and dome near the diaphragm.

1.15.3\ Measuring Method and Normal

Measuring inner diameter of the middle hepatic vein at point that is 1–2 cm from the inferior vena

cava. Its diameter should be less than 1.0 cm generally.

1.15.4\ Clinical Application Value

(1) The hepatic vein and gallbladder can be shown simultaneously in this section which is a landmark of the middle line of the liver which can be used as a dividing line of the right lobe and right lobe. (2) To diagnose hepatic vein lesions. (3) To determine the location of the hepatic space-occupying lesion and the relationship between the lesion and the hepatic vein.

8  The Digestive System Organ Scanning

1.16\ Longitudinal Scanning

of the Right Liver through

the Porta Hepatis

Fig. 8.16  Longitudinal section of the right liver through the porta hepatis

RL

RHV

235

RHD

RPV

IVC

236

M. Zhang

 

 

1.16.1\ Scanning Method

The patient should be on fast for 8–12 h. Subcostal scanning should be performed with the patient in a left lateral decubitus or supine position. Taking a deep inspiration so that the liver moves down as an acoustic window, making the liver imaging more clear.

1.16.2\ Section Structure

Major areas: longitudinal section of the right liver and right portal vein. Oblique scan of the inferior vena cava, common hepatic artery, and right hepatic biliary duct. Sagittal section of the pancreatic head.

1.16.3\ Measuring Method and Normal

Measuring inner diameter of the right portal vein, its normal value should be less than 1.0 cm. Pulsed Doppler gets the right portal vein flow spectrum and blood flow velocity at this section, and its normal value range is 15–20 cm/s.

1.16.4\ Clinical Application Value

This is a standard scan of the porta hepatis. The right portal vein and liver parenchymal near the porta hepatis are observed. It is also used to determine whether the portal vein, common hepatic artery, and right hepatic biliary duct have dilation and to determine whether there is abnormal echogenicity in them.