valve

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  • noun

Words related to valve

a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it

device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone

the entire one-piece shell of a snail and certain other molluscs

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one of the paired hinged shells of certain molluscs and of brachiopods

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References in periodicals archive ?
MCU in the follow up had persistent dilated urethra in 66% cases, unilateral reflux in 36% cases, bilateral reflux in 22% cases, residual posterior urethral valve in 26% cases and urinary bladder diverticulum in only 4% cases.
Obstructive nephropathy in children: long-term progression after relief of posterior urethral valve.
In our study, a history of operation because of posterior urethral valve was present in 10 patients.
Once the diagnosis of posterior urethral valves has been established with a voiding cystourethrogram and all acute medical issues stabilized, definitive treatment of the obstructing valves can then be performed.
7, 8] It is difficult to know the true incidence of posterior urethral valves.
In this paper, we aimed to emphasize that in addition to the cervicothoracic spinal defects, the cases of male MURCS may be associated with other miscellaneous genitourinary anomalies, such as renal cross ectopy, vesicoureteral reflux, posterior urethral valve and bladder dysfunctions related to prolonged infravesical obstruction, duplicated urethra, undescended testis and/or vanishing testis.
CONCLUSION: To conclude posterior urethral valve is a threatening congenital anomaly that needs appropriate surgical treatment and long term follow up.
Predisposing factors such as hypotonia as seen in Down syndrome, connective tissue disorders as in Ehlers-Danlos syndrome, or structural malformations such as posterior urethral valves should alert urologists to take special precautions with these patients because they may be at a higher risk of iatrogenic injury.
Moderate and severe cases with diameters greater than 15 mm (grades 3 and 4) are often associated with ureteropelvic junction obstruction, posterior urethral valves, and vesicoureteral reflux (VUR); mild cases (grades 1 and 2) mostly resolve spontaneously (7).
The most commonly diagnosed CAKUT include a multicystic dysplastic kidney (MCDK), vesico-ureteric reflux (VUR) and obstructive uropathy due to posterior urethral valves (PUV) or pelvoureteric junction obstruction (PUJO).
Figure 4 illustrates the case of a 5-year-old with undiagnosed posterior urethral valves and significant upper urinary tract distress, ultimately resulting in renal failure.
Posterior urethral valves (PUV) disorder is the most common cause of this condition in male fetuses (2).
Posterior urethral valves, pressure pop-offs and bladder function.
In a retrospective analysis, of the 52 children treated for posterior urethral valves (PUV), 34 had renal scarring (3).
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