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A urinary tract infection (UTI) is an infection that affects a part of the urinary tract. [1] Lower urinary tract infections may involve the bladder ( cystitis ) or urethra ( urethritis ) while upper urinary tract infections affect the kidney ( pyelonephritis ). [ 10 ]
The human urinary system, also known as the urinary tract or renal system, consists of the kidneys, ureters, bladder, and the urethra. The purpose of the urinary system is to eliminate waste from the body, regulate blood volume and blood pressure, control levels of electrolytes and metabolites , and regulate blood pH .
Depending on the location of the obstruction, one or both sides of the urinary tract will be involved. In approximately 50% of cases of congenital hydronephrosis, there is no known cause. [1] In many cases, obstruction along the urinary tract in utero leads to some form of CAKUT mentioned above.
Endourology is the branch of urology that deals with the closed manipulation of the urinary tract. [19] It has lately grown to include all minimally invasive urologic surgical procedures. As opposed to open surgery, endourology is performed using small cameras and instruments inserted into the urinary tract.
About 150 million people develop a urinary tract infection in a given year. [5] They are more common in women than men. [3] Up to 10% of women have a urinary tract infection in a given year, and half of women have at least one infection at some point in their lifetime. [6] [3]
Urinary tract obstruction is a urologic disease consisting of a decrease in the free passage of urine through one or both ureters and/or the urethra. It is a cause of urinary retention . Complete obstruction of the urinary tract requires prompt treatment for renal preservation. [ 1 ]
Unlike the urinary bladder of vertebrates, the urinary bladder of crustaceans both stores and modifies urine. [50] The bladder consists of two sets of lateral and central lobes. The central lobes sit near the digestive organs and the lateral lobes extend along the front and sides of the crustacean's body cavity. [50]
Assessment of the urinary tract for abnormalities such as blockage or narrowing, the presence of kidney stones, or tumours. [2] Use of duplex ultrasound to determine if there is backward flow of urine, for example in vesicoureteric reflux. Determination of how much urine is in the bladder, for example to assess for urinary retention.