A client has been given instructions about collecting a urine specimen to test creatinine clearance. The client indicates correct understanding of the specimen collection procedure by making which statement?

Question

A client has been given instructions about collecting a urine specimen to test creatinine clearance.  The client indicates correct understanding of the specimen collection procedure by making which statement?

Quizplus · Accepted Answer

Creatinine clearance is a measure of glomerular function and is a sensitive indicator of renal disease progression. A 24-hour urine collection is needed for the test. When the test begins, the first urine specimen is discarded and the time is noted. All other voided urine for the next 24 hours is collected in a container and kept cool. At the end of the 24 hours, the client should void one last time and add the specimen to the container. Blood is drawn to measure serum creatinine level in addition to urine creatinine. (Option A) An in-and-out catheter (straight catheter) is used for any test requiring a urine specimen when the client is unable to urinate or unable to follow the specimen collection procedure. A catheter is also used for a cystourethrogram or a residual urine test. (Option B) Clean catch or midstream urine samples are collected for urinalysis or urine culture and sensitivity testing. For a creatinine clearance test, all urine for the 24-hour period must be collected or the test must be started again. (Option D) The first AM void is preferable for a urinalysis or urine culture and sensitivity as an overnight specimen is more concentrated. Educational objective: Creatinine clearance is a measure of the glomerular filtration rate. The test requires a 24-hour urine specimen and a blood specimen. When the test begins, the first urine specimen is discarded and the time is noted.

A Client Has Been Given Instructions About Collecting a Urine