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Abdominal ultrasound is of some benefit, but not diagnostic. Features that suggest posterior urethral valves are bilateral hydronephrosis, a thickened bladder wall with thickened smooth muscle trabeculations, and bladder diverticula. [citation needed] Voiding cystourethrogram (VCUG) is more specific for the diagnosis.
Ultrasound involves a probe that is placed near a structure and uses the transmission of ultrasound waves through a structure to produce images, after computer processing. [1] Ultrasound of the urinary tract is performed by a probe placed on the abdominal wall, called a transducer. [1] This occurs while a person is lying down. [1]
Cystoscopy has similar indications in animals, including visualisation and biopsy of mucosa, retrieval or destruction of urinary bladder stones and diagnosis of ectopic ureters. [9] [10] [11] In turtle and tortoises, cystoscopy has additional value as it permits the visualisation of internal organs due to the thin urinary bladder wall. [12]
Trabeculated bladder on ultrasound indicates high risk of developing urinary tract abnormalities such as hydronephrosis and stones. [10] A voiding cystourethrography study uses contrast dye to obtain images of the bladder both when it is full and after urination which can show changes in bladder shape consistent with neurogenic bladder. [9]
It can detect lesions in the bladder that are large enough to be seen, gauge the thickness of the bladder wall, and look for additional lesions that might be the source of hematuria. Cystitis cystica can show up on a CT urogram as a number of small, rounded filling defects in the bladder wall that range in size from 2 to 5 mm. Lesions can also ...
Disorders of bladder function may be dealt with surgically, by redirecting the flow of urine or by replacement with an artificial urinary bladder. The volume of the bladder may be increased by bladder augmentation. An obstruction of the bladder neck may be severe enough to warrant surgery. Ultrasound can be used to estimate bladder volumes. [31 ...
Common findings, determined by ultrasound of the bladder, include a slow rate of flow, intermittent flow, and a large amount of urine retained in the bladder after urination. A normal test result should be 20–25 ml/s peak flow rate. A post-void residual urine greater than 50 ml is a significant amount of urine and increases the potential for ...
Ultrasound findings may show thickened gall bladder wall, tiny anechoic spaces (Rokitansky–Aschoff sinuses or RAS), and twinkling artifact (or comet-tail reverberation). Comet tail reverberation, which is due to reflections from cholesterol crystals, is a highly specific sign for adenomyomatosis.