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Foley Catheter

Foley Catheter Introduction

A Foley catheter is a thin, sterile tube inserted into the bladder to drain urine. Because it can be left in place in the bladder for a period of time, it is also called an indwelling catheter. It is held in place with a balloon at the end, which is filled with sterile water to prevent the catheter from being removed from the bladder. The urine drains through the catheter tube into a bag and can then be taken from an outlet device to be drained. Laboratory tests can be conducted on the urine to look for infection, blood, muscle breakdown, crystals, electrolytes, and kidney function. The procedure to insert a catheter is called catheterization.

A Foley catheter is used with many disorders, procedures, or problems such as these:

  • Retention of urine leading to urinary hesitancy, straining to urinate, decrease in size and force of the urinary stream, interruption of urinary stream, and sensation of incomplete emptying
  • Obstruction of the urethra by an anatomical condition that makes it difficult for one to urinate: prostate hypertrophy, prostate cancer, or narrowing of the urethra
  • Urine output monitoring in a critically ill or injured person
  • Collection of a sterile urine specimen for diagnostic purposes
  • Nerve-related bladder dysfunction, such as after spinal trauma (A catheter can be inserted regularly to assist with urination.)
  • Imaging study of the lower urinary tract
  • After surgery
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