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Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
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10  Urinary and Male Reproductive System Scanning

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2\ Bladder Scanning

2.1\ Longitudinal Plane of the Bladder

from Suprapubic Symphysis

Fig. 10.9  Longitudinal plane of the bladder from suprapubic symphysis

BL

PST

388

S. He et al.

 

 

2.1.1\ Scanning Method

The patient lies in supine position with his bladder moderately filled. Sagittal and oblique scannings of the bladder are obtained from the suprapubic symphysis at the lower abdomen.

2.1.2\ Section Structure

On the long-axis plane, the exact shape of the bladder varies with the degree of distension. The full bladder has the shape of a rounded triangle in the sagittal plane. The upper part of the bladder is called the apex, and the lower part called fundus of the bladder. The triangular area, locating at the posterior and lower part of the bladder, is formed by the tow openings of the ureters and the urethral orifice. There is little of residual urine (less than 10–20 mL) in the normal bladder after urination.

2.1.3\ Measuring Method and Normal

The wall of the bladder is 0.2–0.4 cm thick. The upperlower and posterior-anterior diameters can be measured. The bladder volume is estimated by measuring maximal anteroposterior, coronal, and craniocaudal diameters and multiplying by (0.52), while the residual urine multiplying by 0.7 if the patient has uropenia.

2.1.4\ The Clinical Application Value

This view is used to diagnose the space-­occupying lesion of the bladder wall seen more common in the triangular area and lesion within the bladder and to measure the bladder volume and residual urine.