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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

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5.9\ Short Axis Scanning

of the Stomach Antrum by

the Right Upper Abdomen

Fig. 8.61  Short axis scanning of the stomach antrum by the right upper abdomen

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5.9.1\ Scanning Method

The patient should be on fast for 8–12 h with a supine position. The probe is sagittally placed in subxiphoid and inclined on the left upper abdomen. The patient must drink 800–1000 mL of water to fill the stomach. The scan must be operated along the long axis direction of the stomach obliquely and placed in the upper abdomen.

5.9.2\ Section Structure

Major area: short axis section of stomach antrum. Sagittal view of pancreatic head and oblique view of the right liver and gallbladder.

5.9.3\ Measuring Method and Normal

Measuring gastric wall thickness. Thickness of the normal stomach wall is approximately 3–5 mm, and greater than 6 mm is thought to be abnormal.

5.9.4\ Clinical Application Value

Observing the anterior wall and posterior wall of the stomach antrum.

8  The Digestive System Organ Scanning

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5.10\ Oblique Scanning

of the Pylorus

and the Duodenal Bulb

Fig. 8.62  Oblique scan of pylorus and the duodenal bulb. Note: 1 Pylorus

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5.10.1\ Scanning Method

The patient should be on fast for 8–12 h with a supine position. The probe is placed transversely to the upper abdomen, slightly oblique to the right posterior. The patient needs to drink 800– 1000 mL of water to fill the stomach.

5.10.2\ Section Structure

Major area: pylorus and the duodenal bulb. Ancillary area: gastric antrum and gastric body.

5.10.3\ Measuring Method and Normal

Measuring gastric wall thickness. Normal is approximately 3–5 mm. Greater than 6 cm is thought to be abnormal. Thickness of the normal

duodenal wall should be <0.4 cm; 0.5–0.6 cm is a critical value, and greater than 0.6 cm is thought to be abnormal. Thickness of the pyloric circular muscle in infants and young children should be <0.3 cm. Greater than 0.4 cm as for anomalies. Pyloric length >1.6 cm in infant is abnormal and a thickness >1.4 cm is abnormal. Adult helicobacter wall thickness should be <0. 6 cm.

5.10.4\ Clinical Application Value

To observe the morphology of the gastric antrum, pylorus, and duodenal bulb and to diagnose pathological changes of the pyloric and duodenal bulb, such as hypertrophy, narrowness, pylorus relaxation, etc.

8  The Digestive System Organ Scanning

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5.11\ Transverse Scanning

of the Droop Part

of the Duodenum

Fig. 8.63  Transverse section of the droop part of the duodenum

 

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