Urinary Catheters (ASAN002/20) Flashcards
Urinary Catheterisation
Main ‘types’ of urinary catheterisation:\nIntermittent\nIndwelling
Intermittent Urinary Catheterisation:
Where catheter is passed & then removed.
Indwelling Urinary Catheterisation:
Catheter is left in place for a period of time.
Reason for Urinary Catheterisation:
Obtain urine sample\nEmpty the urine bladder\nHydro propulsion\nIntroduce contrast media\nMaintain constant bladder drainage\nMonitor urine output
To obtain a urine sample:
Intermittent urinary catheterisation.\nSterile – for culture & sensitivity.\nWhen patient will not urinate & sample is required ASAP.\nWhen mid–stream sample is required.
To empty the urine bladder:
Intermittent urinary catheterisation.\nBefore abdominal, vaginal & urethral Sx.\nPrior to pneumocystogram.
Hydro propulsion:
When partial obstruction or inability to urinate but catheter can be passed.
To introduce contrast media:
E.g. Air for pneumocystogram
Maintain constant bladder drainage:
Indwelling catheter\nIn recumbent patients to prevent soiling & scalds.\nFLUTD cases – where patency & drainage are maintained until condition is controlled.\nPost bladder Sx to prevent over–distension / tension on the bladder.
To monitor urine output:
Patients in renal failure receiving IV fluids.\nIf dysuria / anuria / oliguria present & monitoring urine production is essential.
Types of Urinary Catheters
Canine Male Catheters\nBitch Catheters\nFeline Catheters
Canine Male Catheters:
Plastic dog catheter\nFoley Silicone Catheter
Plastic Dog Catheter:
Catheters are quite stiff – assists with placement.\nTwo drainage holes (one on either side) – situated behind rounded tip.\nMost commonly used for intermittent urinary catheterisation – can be indwelling too.\nIrritation & trauma can occur – due to rigidness of catheter.\nUse largest gauge appropriate for patient size (unless partial obstruction or stricture is present) – too small may allow urination around catheter & tip may bend on insertion (causing trauma to urethra).\nOften used for bitch catheterisation as rigidity makes placement easier – care must be taken to prevent trauma to urethra.
Foley Silicone Catheter:
Very flexible & smooth.\nIdeal for indwelling use.\nSmall inflatable balloon behind drainage holes at tip of catheter.\nOnce inserted, balloon is inflated with sterile saline & creates an indwelling catheter (doesn’t need to be sutured to skin).\nDog folley cath. designed same as bitch indwelling cath. – just longer in length.\nMade from inert silicone – causes no mucosal irritation.\nWire–guide stylet can be used to assist placement – can be easily placed in male dog without this.\nSilicone catheters can be re–used after correct sterilisation.
Bitch Catheters:
Silicone Indwelling Foley Catheter\nLatex Foley Indwelling Bitch Catheter\nTiemans Catheter