Urinary Elimination Study Notes

Urine is formed by nephrons through two main structures: the renal corpuscle and the renal tubule.
The three processes of urine formation are filtration, reabsorption, and secretion.
Ureters transport urine to the bladder, which expands to store urine and contracts to empty it.
The urethra transports urine from the bladder for elimination.
Normal urine is sterile, free from pathogens, and contains fluids, salts, and waste products.

Anuria: Complete failure to produce or excrete urine.
Oliguria: Reduced volume of urine.
Polyuria: Excessive urine volume.
Nocturia: Excessive urination during the night.
Dysuria: Painful urination.
Hematuria: Abnormal presence of red blood cells in the urine; color intensity does not correlate with blood loss volume.
Urinary Incontinence Types: * Stress: Loss of control during physical activity. * Urge: Rapid bladder contraction and strong urge to void. * Mixed: Combination of stress and urge incontinence. * Functional: Lack of control without physical abnormalities. * Overflow: Constant dribbling due to incomplete emptying. * Temporary: Caused by infection, medication, or severe constipation.
Urinary Retention: Inability to empty the bladder caused by obstruction or neurologic disorders; results in weak flow and pain.

Key factors include developmental stage, psychosocial factors, fluid/food intake, medication, muscle tone, and pathologic conditions like UTIs.
Mental status changes can signify elevated nitrogenous wastes in the blood due to kidney dysfunction.
General fatigue and burning during micturition are classic symptoms of kidney or urinary issues.
Abdominal assessment techniques include inspection, auscultation, percussion, and palpation.
BladderScan BVI $9400$ is used to evaluate urine volume (e.g., $150\,mL$ ).
Normal urine output is approximately $30\,mL/hr$ .
Urine inspection focuses on color, clarity (affected by bacteria, sperm, or crystals), and odor.

Blood Tests: Blood urea nitrogen (BUN) and creatinine.
Urinalysis: * Specific gravity: Measures water and solute balance. * $pH$ : Reflects acidity or alkalinity. * Protein, Glucose, and Ketones: Screen for fever, diabetes, or fat breakdown. * Microscopic Analysis: Checks for casts, crystals, or blood cells. * UTI Screening: Nitrates and leukocyte esterase.
$24$ -hour urine collection: Measures creatinine clearance, protein, and hormones.
Culture and Sensitivity: Used to diagnose UTI and determine effective treatments.
Diagnostic Imaging: * Ultrasound: Assesses kidney size and location. * KUB X-ray: Investigates stones or bowel obstructions. * Intravenous Pyelography (IVP): Uses timed X-rays to identify tumors or damage. * Computed Tomography (CT): Diagnoses blockages or stones using contrast media. * Cystoscopy: Direct visualization of the bladder and urethra to determine causes of hematuria or dysuria.

Impaired Urination: Supported by evidence of microorganisms, urgency, and burning.
Urinary Retention: Supported by distention, post-anesthesia state, or scan residuals.
Impaired Self-Toileting: Supported by neuromuscular impairment or paralysis.
Short-term goals: Resolution of UTI symptoms within $5$ days; spontaneous voiding within $12$ hours post-surgery.
Long-term goals: No UTIs for $12$ months; independent toileting within $9$ months of a cerebrovascular accident.

Promote normal patterns through client habits, bedside commodes, and proper fluid intake.
Kegel exercises and biofeedback help improve pelvic muscle tone.
UTI Prevention: Cotton-lined underwear, at least $8$ glasses of $8$ -ounce water daily, showers instead of baths, and prompt voiding.
Urinary Catheterization: * Types: Straight, Foley, Coudé, and Triple lumen. * Indications: Acute retention, complex surgery imagery, critical illness monitoring, wound healing, and end-of-life care. * External devices: Female collection bags (wall suction) and condom catheters (replace daily).
Specimen Collection: Clean-catch (midstream) for cultures; straight catheterization for sterile samples.

Question: The nurse suspects a UTI based on frequent urination, burning, and fatigue. Which assessment findings support this? * a. Reports of burning with urination. * b. Frequent urination. * c. Elevated nitrogenous wastes in the blood. * d. Presence of leukocyte esterase in urine. * e. Lack of urine control in the absence of abnormalities.
Question: A client experiencing a failure to produce or excrete urine has what documented? * a. Anuria. * b. Polyuria. * c. Dysuria. * d. Oliguria.
Question: Identify two findings most indicative of a UTI from these results: Specific gravity $1.015$ , $pH$ $7.5$ , Nitrates: Positive, Leukocyte Esterase: Positive, RBC $0-2/hpf$ , WBC $0-3/hpf$ . * a. Specific gravity $1.015$ * b. $pH$ $7.5$ * c. Positive Nitrates * d. Positive Leukocyte Esterase * e. Negative Protein * f. Negative Ketones