Urinary Tract Infections

Core Concepts

Why pregnant people are at higher risk

Progesterone relaxes the ureters and slows peristalsis, the gravid uterus compresses the ureters at the pelvic brim and displaces the bladder, and bladder tone changes leave more residual urine after voiding. Stagnant urine gives bacteria time to multiply. The short female urethra sits close to the anus, so perineal hygiene directly influences risk. These anatomical facts explain why UTIs are so common in pregnancy and why teaching is a first-line nursing intervention.

Cystitis versus pyelonephritis

Cystitis — the bladder — typically causes dysuria (burning with urination), frequency, urgency, and suprapubic pressure, sometimes with visible blood in the urine. Pyelonephritis — the kidney — adds systemic signs: fever, chills, flank or back pain, nausea and vomiting, and tenderness over the kidney (costovertebral angle). In pregnancy, symptoms may be blunted, and a person can progress to pyelonephritis with little warning. Any fever, flank pain, or vomiting with urinary symptoms in a pregnant person is a red flag requiring immediate reporting.

Asymptomatic bacteriuria

Sometimes bacteria grow in the urine (a positive culture) without any symptoms — asymptomatic bacteriuria. In most nonpregnant people it can be left alone, but in pregnancy the dilated, sluggish tract can allow those bacteria to climb to the kidney. This is why routine urine screening is part of prenatal care and why "I feel fine" does not mean the urine does not need checking. Culture interpretation follows the lab's and provider's criteria; the nurse's role is to make sure screening specimens are collected properly.

Collecting a specimen that can be trusted

A contaminated specimen (bacteria from skin or vaginal discharge instead of the bladder) produces misleading results. The nurse teaches the clean-catch midstream technique: wash hands; cleanse the perineum front to back with the provided wipes; begin voiding into the toilet; catch the middle of the stream in the sterile cup; finish voiding; cap and label immediately. Collection should avoid menstruation when possible, and the specimen should reach the lab or be refrigerated promptly — bacteria multiply at room temperature. In the hospital, the nurse follows facility policy for collection and transport.

Prevention teaching

Core teaching: drink plenty of fluids; urinate when the urge is felt rather than "holding it"; empty the bladder before and after intercourse; wipe front to back; wear cotton underwear; avoid perfumed soaps, bubble bath, and feminine hygiene sprays that irritate the urethra. Cranberry products are commonly discussed, but the evidence for preventing or treating UTIs is mixed — the nurse should not present them as treatment and should flag the topic for current-evidence review.

Recognizing trouble and referring

Signs requiring prompt provider notification: fever or chills, flank or back pain, nausea or vomiting, inability to void, or worsening symptoms despite treatment. The nurse documents objectively and reports. Antibiotic choice during pregnancy is the provider's decision, since some agents are avoided in pregnancy — the nurse never suggests a specific drug. Hospitalized and postpartum people with indwelling catheters are at extra risk; the nurse follows facility policy on catheter care and supports early removal of catheters per orders.

Common Confusions