Congenital posterior urethral valves in an adult

Volumetric and ultrasonic studies of the system (water+polypropylene glycol 400) at temperatures from (283.15 to 313.15) K

“…This is due to chain-like structure of the polymer and its greater free volume. Also, it has been shown that [5][6][7] the increase in u and decrease in j s with w 2 indicated increase in intermolecular forces forming aggregates of solvent molecules around the solute due to which structural arrangement is affected (polymer-solvent interaction). From figure 1, it can be seen that at the temperature T = 283.15 K for the whole range of polymer composition, the polymer solution compressibility is less than that of the pure water and this indicates that at this temperature the strong polymer-solvent interaction exist.…”

“…Many research groups have focused their attention to obtain information on the thermodynamics of aqueous polyethylene glycol (PEG), which is often used in biotechnology. Knowledge of acoustical properties of aqueous polymer solutions provides useful information on hydrophobicity or hydrophilicity of polymer in solutions [1][2][3][4][5][6][7]. Recently, ultrasonic speed measurements were made on the aqueous PEG solutions to obtain useful information on the unique types of interactions in this system [8].…”

Lower abdominal mass in a 16-year old adolescent: an unusual presentation of posterior urethral valves

“…1,[3][4][5][6][7][8] Late presenting PUV patients may display both bladder storage and emptying symptoms, incontinence, sexual dysfunction and recurrent urinary tract infections. 1,[3][4][5] In one of the earliest and largest adult series, Mahony and Laferte studied 26 cases of PUV in men over 21 years of age. The most common presentation was frequency and urgency, followed by obstructive voiding symptoms predominantly in men older than 40 years.…”

“…[1][2][3][4] Older patients usually present with lower urinary tract symptoms, overflow incontinence, recurrent infections, or less commonly, ejaculatory dysfunction, gross hematuria and renal insufficiency. [3][4][5][6][7] We present the rare case of a 16-year-old adolescent who presented late with progressive lower abdominal distension, intermittent urinary incontinence and renal insufficiency.…”

Adult posterior urethral valve: a case report

“…The majority of cases are diagnosed in infancy and early childhood especially during evaluation of male newborn for prenatal hydronephrosis and rarely in adolescence or adulthood. The diagnosis of PUV is usually made early, and PUV cases have rarely been detected in adults [6], [7], [8], [9]. Here we report the case of a 35-year-old man with PUV, who presented with obstructive symptoms.…”