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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

1.4\ Transverse Scanning of the Left Hepatic Lobe Through the Left Portal Vein Branches by Subxiphoid

Fig. 8.4  Transverse section of the left hepatic lobe through the left portal vein branches by subxiphoid. Note: 1 umbilical and sagittal, 2 the external inferior branch of left portal vein, and 3 the external superior branch of the left portal vein

LTH

1

IVC

RL

211

2 LL 3

CL

212

M. Zhang

 

 

1, Sagittal segment of the left portal sagittal vein 2, Left external-internal branch of the portal vein 3, Left external-superior branch of the portal vein.

tal segment can be a congenital variant. It will be wide in the case of portal vein hypertension patients. The thickness of the caudate lobe is measured, and its normal upper limit is 3 cm.

1.4.1\ Scanning Method

The patients should be on fast for 8–12 h with a supine position. Probe is put horizontally at the level of subxiphoid to scan toward the posterior-superior.

1.4.2\ Section Structure

Major areas are the left hepatic lobe and left portal vein branches. Ancillary areas are the transverse section of the inferior vena cava, left lobe oblique section, sagittal section of the sagittal segment of the left portal, longitudinal section of the left external-superior branch and left external-internal branch, and left intrahepatic bile duct.

1.4.3\ Measuring Method and Normal

The inner diameter of the sagittal segment of the left portal vein is measured; generally the sagittal diameter should be less than 1.0 cm, but the sagit-

1.4.4\ Clinical Application Value

(1) Positioning of the left lobe lesion location. The sagittal segment of the left portal vein will separate the left interior lobe from the left exterior lobe. Link line of the left hepatic cross-sec- tional and midpoint attachment of left portal vein branches separates the left exterior-superior lobe and the left inferior lobe. (2) Observing the left portal branch whether it appears dilated or narrow, with the presence of emboli, (3) and whether there is dilation of the left intrahepatic bile duct.

(4) The inferior vena cava obstruction, severe cirrhosis, or morphological change of the liver can cause caudate lobe enlargement.

8  The Digestive System Organ Scanning

1.5\ Longitudinal Scanning of the

Left Hepatic Lobe Through the

Caudate Lobe and Medial Lobe

Fig. 8.5  Longitudinal scanning of the left hepatic lobe through the caudate lobe and medial lobe. Note: 1 umbilical and sagittal of left portal vein

LL

1

CL

213

VL

CBD

PV

IVC

214

M. Zhang

 

 

1.5.1\ Scanning Method

The patient should be on fast for 8–12 h with a supine position. Probe is placed in the middle line of the subxiphoid vertically.

1.5.2\ Section Structure

Major structures: longitudinal section of the left hepatic lobe, caudate lobe, and venose ligamentum. Ancillary areas oblique section of the portal vein, inferior vena cava, and common bile duct.

1.5.3\ Measuring Method and Normal

Measuring the anteroposterior diameter of the caudate lobe. It should be less than 3 cm in the normal liver.

1.5.4\ The Clinical Application Value

This is a standard section for measuring the anteroposterior diameter of the caudate lobe. To observe the size, shape, and echogenicity of the hepatic parenchyma of the caudate lobe.

8  The Digestive System Organ Scanning

1.6\ Oblique Scanning of the Left

External Hepatic Lobe

Fig. 8.6  Oblique scanning of the left external hepatic lobe. Note: 1 umbilical and sagittal section of the left portal vein

LL

1

CL

IVC

215

ST

P

SpV

VL

Ao