Coat the distal portion of the catheter (the 0.78-1.97 in (2-5 cm) portion at the tip) with a generous amount of lubricant. This is the end you will insert into the urethral opening. If using a balloon catheter, be sure to lubricate the balloon portion at the tip as well. Hold the catheter in your dominant hand and use your non-dominant hand to spread the patient's labia so that  you are able to see the urethral opening. Gently insert the tip of the catheter into the urethra. Hold the penis in your non-dominant hand and gently pull upward, perpendicular to the patient's body. Insert the tip of the catheter into the patient's urethra with your dominant hand. The length of the catheter should be gently fed through the urethra and into the bladder until urine is observed. After urine begins to flow, continue to push the catheter into the bladder another 2 inches (5.08 cm) to make sure the catheter is against the neck of the bladder. Use a water-filled syringe to inflate the balloon via sterile tubing connected to the catheter. The inflated balloon serves as an anchor so as not to displace the catheter when moving. Once inflated, pull gently on the catheter to ensure the balloon is seated snugly against the neck of the bladder. The amount of sterile water you use to inflate the balloon depends on the size of the balloon on the catheter. Usually, about 10 cc of water is required, but check the size of your balloon to be sure. Use sterile medical tubing to allow urine to drain into a drainage bag. Secure the catheter to the patient's thigh or abdomen with tape.  Make sure you place the drainage bag lower than the patient's bladder. Catheters work via gravity - urine cannot drain "uphill." In a medical environment, catheters can be left in for as long as 12 weeks before being changed, though they are often removed much earlier. Some catheters, such as a straight or intermittent catheter, for instance, are removed immediately after urine stops flowing.
ضع مادة ملينة على قمة القسطرة. لو كانت المريضة أنثى، أمسك جزء الصماغ الإحليلي الموجود فوق مهبل الأنثى و أدخل القسطرة إلى الشفرين. لو كان المريض ذكرًا، أمسك بالقضيب ثم أدخل القسطرة في قناة مجرى البول عن طريق الفتحة البولية. استمر بالدفع حتى تستقر القسطرة في المثانة. في حالة استخدام قسطرة ببالون، املأ البالون بماء معقم. اربط القسطرة بكيس استقبال البول.