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Cystometry is a diagnostic test used to evaluate bladder pressure and function, often used to diagnose bladder stones, prostate abnormalities, and spinal cord injuries. The bladder is filled with a neutral liquid or gas, and the data recorded during the exam is plotted on a graph known as a cystometrogram (CMG) for analysis. The procedure involves inserting a thin catheter equipped with a cystometer into the bladder through the urethra. Cystoscopy is a related procedure used to diagnose conditions such as bladder stones, irritable bladder, and prostate abnormalities. The entire cystometric test process usually takes less than an hour from start to finish.
Cystometry, also known as a cystometric study, is a diagnostic test used to evaluate bladder pressure and function. Used as an investigative tool, cystometry is administered to diagnose a variety of conditions including bladder stones, prostate abnormalities, and spinal cord injuries. As with any medical procedure, there are risks associated with cystometry and these should be discussed with a qualified healthcare professional before testing.
During cystometry, the bladder is filled with a neutral liquid or gaseous substance to test the bladder pressure and force of contraction during the voiding process. Once the measurements within the bladder are documented, the ability of the bladder to excrete substance is recorded to help determine the source of the patient’s urinary problems. The data recorded during the exam is plotted on a graph known as a cystometrogram (CMG) for analysis. The volume of substance given to fill the bladder is contrasted with the pressure built up within the bladder as it fills. Additional data recorded during the urination process includes the duration of voiding, the amount of urine, and any delay or straining that may have occurred.
The cystometric procedure itself involves inserting a thin catheter equipped with a cystometer into the bladder through the urethra. The catheter introduces a saline solution or carbon dioxide gas into the bladder while the cystometer measures the pressure inside the bladder as it fills. The time to which the patient had initial awareness of a full bladder and the time it took to feel the need to urinate is documented. The patient may experience some discomfort with the introduction of the catheter and a strong urge to urinate as the bladder fills.
Cystoscopy is a related procedure used to diagnose conditions such as bladder stones, irritable bladder, and prostate abnormalities. As a diagnostic test, cystoscopy employs the use of a catheter equipped with a small camera that is inserted into the bladder through the urethra to evaluate the state of the bladder wall. Filling the bladder with saline causes it to distend allowing for a clear image. If abnormal tissue is discovered during the exam, a biopsy may be performed.
The entire cystometric test process usually takes less than an hour from start to finish. Although complications associated with cystometry are rare, people who have this procedure can develop a urinary tract infection. Those who undergo a biopsy while a cystoscopy procedure is being administered are at a lower risk of experiencing excessive bleeding at the biopsy site. Rare cases of bladder wall rupture during the cystoscopy testing process have been documented.
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