Cystometry involves measuring pressures in which areas along with patient sensation?

Cystometry involves measuring pressures in which areas along with patient sensation?

• A. Bladder and urethra
• B. Bladder and rectum
• C. Kidneys and bladder
• D. Bladder and abdomen

Answer: (B)

Cystometry tests how the bladder stores urine by filling it and tracking pressures while you note the patient’s sensations of filling, urgency, and desire to void. To interpret those pressures accurately, two pressure measurements are taken: one inside the bladder and another representing the pressure coming from the abdomen. A rectal catheter provides that abdominal reference pressure, so the data collected are the bladder pressure and the rectal (abdominal) pressure. This setup allows calculation of detrusor pressure (bladder pressure minus abdominal pressure), which reflects the bladder muscle’s true activity during filling and storage. That’s why the areas involved are the bladder and the rectum. The kidneys aren’t involved in this test, and while abdominal pressure supports interpretation, the rectum is the typical reference point used in practice. The patient’s sensation data are recorded simultaneously to correlate pressure changes with feelings of fullness and urge.

Cystometry tests how the bladder stores urine by filling it and tracking pressures while you note the patient’s sensations of filling, urgency, and desire to void. To interpret those pressures accurately, two pressure measurements are taken: one inside the bladder and another representing the pressure coming from the abdomen. A rectal catheter provides that abdominal reference pressure, so the data collected are the bladder pressure and the rectal (abdominal) pressure. This setup allows calculation of detrusor pressure (bladder pressure minus abdominal pressure), which reflects the bladder muscle’s true activity during filling and storage. That’s why the areas involved are the bladder and the rectum. The kidneys aren’t involved in this test, and while abdominal pressure supports interpretation, the rectum is the typical reference point used in practice. The patient’s sensation data are recorded simultaneously to correlate pressure changes with feelings of fullness and urge.