Catheterization

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catheterization

[‚kath·əd·ə·rə′zā·shən]
(medicine)
Insertion or use of a catheter.

Catheterization

 

the introduction of a special device (catheter) into the natural ducts and cavities of the human body in order to irrigate them and evacuate their contents.

All the requirements of asepsis (sterilization of the catheters, treatment of the hands and of the inlets) must be observed in catheterization. In treating ear diseases, physicians use metal catheters with a knoblike end to ventilate the tympanic cavity through the eustachian tube. In cardiology, a special catheter is inserted into the heart to establish a diagnosis and, if required, to determine the nature and scope of surgical intervention. The cardiac catheter is a thin tube 100–125 cm long made of a specially treated silk material that is impermeable to X rays; an attached movable tip ensures the proper passage of the device through the vessel. In cardiac catheterization, blood specimens can be taken from the heart’s cavities, a contrast medium can be introduced into the cavities for subsequent X-ray examination, and blood pressure can be measured in the cavities at the various phases of cardiac activity. In urology, the ureters can be cathe-terized with a special catheterization cystoscope. The procedure is used to determine the patency of the ureters, to collect urine separately from each kidney, and to inject a contrast medium into the renal pelvis for subsequent X-ray examination (pyelography).

Catheterization is performed with a tubelike device made of rubber, silk cloth impregnated with varnish, or metal. Catheters differ in shape and thickness; these values are measured by numbers on a special scale. Urologists ordinarily use catheters of rubber or metal that are 24–36 cm long for the male and 14—16 cm long for the female. Catheters with a small balloon at the end are also used. When inflated with air or filled with fluid, the balloon prevents the device from slipping out. Ureteral catheters are made of a silk material impregnated with varnish; they are 40–45 cm long. The length of a catheter is usually marked off in centimeters so that it can be inserted to a precise distance.

REFERENCES

Mnogotomnoe rukovodstvo po khirurgii, vol. 9. Moscow, 1959. Pages 62–64.
Rukovodstvo po klinicheskoi urologii. Moscow, 1969. Pages 150–51.

V. G. TSOMYK

References in periodicals archive ?
It is always preferred to catheterize more often rather than less often.
7,29) Many pediatric urologists prefer a moderate approach, to leave the patient with a "pop-off" mechanism in the case of inability or unwillingness to catheterize.
The most common reason (in 43 of 105 instances, 41%) was the confirmation by ultrasound for the need to catheterize (Tables 3 and 4).
Likewise, boys with congenital or acquired urethral strictures may be difficult to catheterize.
If your volumes are consistently over 500 mL, then you should either drink less or catheterize more frequently.
As for the difficulty in teaching Lisa how to catheterize herself, Ruthie said, "She was able to do it the same day I taught her.
The question whether to catheterize or not after surgery has been debated for several years and has not yet been resolved.
He was advised by his urologist that he should learn to catheterize himself to prevent urinary tract infections (UTIs).
This means that people who use intermittent catheterization for their bladder program need to reduce the fluid they take in after dinner and may need to get up during the night to catheterize.
So far, she is able to bathe herself (though she has to be helped into and out of the tub), she can catheterize herself, do some dressing, and she has learned minimal cooking skills.
The urologist was again consulted and attempted to catheterize the patient injecting 20 cc anesthetic lidocaine jelly into the meatus.