Final answer:
A distended bladder can increase the risk of postpartum hemorrhage due to uterine atony by impeding uterine contractions and increasing bladder pressure. The bladder experiences heightened pressure during pregnancy because of additional urine volume and fetal pressure, which can raise health concerns.
Step-by-step explanation:
A distended bladder can increase the risk of uterine atony, which is a condition where the uterus fails to contract effectively after childbirth. This can lead to an increase in postpartum hemorrhage, as the contracted uterus helps to compress the blood vessels and stop bleeding. The bladder pressure exerted by a full bladder can contribute to uterine atony by impeding the contractions necessary for the uterus to return to its normal size and function after delivery. In pregnant women, the urinary system is under additional stress due to the increased processing of maternal and fetal wastes, leading to higher urine production. The growing fetus can also exert pressure on the bladder, frequently leading to the urge to urinate and potentially increasing bladder pressure.
The pressure within the urinary bladder can be measured, and it's known that bladder pressure rises steadily from zero to about 25 mm Hg as the bladder fills. High bladder pressure, especially above 100 mm Hg, can cause discomfort and is usually a signal to urinate. High bladder pressure can have detrimental effects, such as forcing urine back into the kidneys, potentially causing severe damage.