Stents- Manishmedi

Kidney stones are one of the reasons or conditions when urology stents manufacturers the medical profession consider using a stent, its main purpose; to drain urine from the body. A stent; ureteral stent manufacturers tell us is a hollow, flexible, latex tube used to drain urine from the kidney to the bladder.  The implanting of a stent is necessary in the event there is a blockage in the ureter. In order to ease this blockage the stent is placed to connect the kidney with the bladder subcutaneously.

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The small (24 to 30 cm) long tube when placed inside the ureter subcutaneously will serve the purpose of draining urine and relieving the pressure within. The “double J” stent, so named because of the curl at both ends is curled to hold it in place. The advantage of the curls is to hold both ends in the right place one end in the bladder and the other in the kidney. This process is common place when there is a blockage in the ureter and the stent circumvents the ureter to drain urine from kidney to bladder.  The normal physiological process of draining urine from kidneys to bladder can be restored once the kidney stone is removed. The urethral stent will stay in your system for up to a week and can even stretch for up to 3 months. This of course depends on several factors such as age, physical condition, and any other conditions at the time. Where a urethral stent is not workable a nephrostomy is performed; this involves insertion of a turp into the patient’s kidney subcutaneously and connected outside to a plastic collection bag for the urine. This is a minimally invasive procedure that uses image guided interventional radiology to guide the tube accurately; it is a delicate procedure and needs to be well supervised. It might also involve a CT scan or MRI in order to conduct the procedure accurately. In most cases general anaesthesia can be induced however depending on age and physical condition a general anaesthesia may be used to induce sedation. The patient is laid face down, a guide wire is inserted into the kidney using a ultrasound to guide the wire the catheter is then inserted and kept in that position for the rest of the stone removal procedure. A stent may be placed in the ureter after the kidney stone is removed to allow the ureter time to heal from the trauma of the stone removal. If you are advised to wear the stent over a prolonged period it need not affect your normal activity, albeit fatigue does surface. Generally otherwise healthy patients will wear the stent for only a short while and in such patients a stent with a string is used. Since this is easily removable a causes minimal discomfort, and even can be done outpatient. Once a stent is in place urine flows easy and there is no internal pressure, discomfort or pain.

Although PCN is a basic urological procedure there are barriers in inserting and positioning it right. This is exactly it is a procedure done using fluoroscopy to even insert the guide wire which enables the catheter to follow.  Again although it is a standard urology procedure the placement of the percutaneous nephrostomy tube in some cases it is a very temporary means of relieving the kidney of urine and thus the pain, caused from the blockage.  Percutaneous nephrostomy which is for the clearance of a urethral blockage, it can happen in paediatric care too. This of course is a case of a congenital obstruction, and is easily resolved.