Urinary Elimination Flashcards
Kidneys
Remove waste from the blood to form urine
Functional unit of the kidneys
Nephron
what kind of muscle are ureters made of?
Smooth muscle, they are smooth muscle tubules
Function of the ureters
Transport urine from the kidneys to the bladder
What is the bladders purpose?
Storage compartment. It is a reservoir for urine until the urge to urinate develops
Urethra
Urine travels from the bladder and exits through the urethral meatus
When should inflants void after birth?
Within 24 hours
Kidneys Functions
- Filter waste from the blood 2. Produce substances that from red blood cells (ethropoeitin) 3. Fluid and electrolyte balance 4. Blood pressure control (RAAAASTA)
What does hypertension lead to?
Decreased urine
What worries is about extra potassium?
Worried about the heart
Brain structures that influence bladder emptying
Cerebral Cortex, Thalmus, Hypothalmus, Brain Stem
What does normal voiding involve?
Contraction of the bladder muscles and relaxation of the urethral spinchter
Maturation
The act of peeing
What can happen after surgery?
Stress—ADH release—urinary retention
Factors influencing urination
Amount of urine in bladder, increasing urine volume stimulates the micturation center in the spinal cord, normally voiding is a voluntary process
How much urine does a normal adult hold?
600 mL is full. 250-400 is normal
Process of peeing
Pressure stresses the detrusor muscles forces bladder open. Sends sensation to spinal cord, reflex back, detrusor contracts
Factors affecting urination: Preneral
(not purfusing well) decreased blood flow to and thru the kidneys
Factors affecting urination: Renal
Diseases in kidney. Disease conditions of the renal tissue
Factors affecting urination: Postrenal
Obstruction. Obstruction in the lower urinary tract
Hydropneprosis
Distention and dilation of kidney pelvis. Obstruction can cause this
Disease/Conditions that influence urination
Diabetes, Multiple Scelerosis, BPH, Cognitive disorders (Alzheimers), End-Stage renal disease
Other Factors that influence urination
Sociocultural factors, psychlogical factors, fluid balance, surgical procedures, medications, diagnostic examination
Are upper or lower UTIs more serious?
Upper. Ureters and kidneys
Where do lower UTIS take place?
Urethra and bladder