Ureteral stent tube (double pigtail catheter, or DJ tube) is widely used in urological surgery, suitable for upper urinary tract surgery such as kidney stones, ureteral stones, hydronephrosis, kidney transplantation, benign tumors of kidney and ureter, and lithotripsy In the course of treatment such as lithotripsy and dilation of ureteral stenosis, it can play an important role in draining urine and preventing ureteral stenosis and adhesion blockage after being implanted in the ureter. Most of the D-J tubes used in clinical applications are made of silicone rubber or polyurethane polymer materials. However, since these materials cannot be degraded and absorbed in the human body, the existing D-J tube products have some insurmountable defects in application:
(1) It must be removed by an invasive operation, that is, through a cystoscope. Although this type of cystoscope operation is not a major operation, the patient will be in great pain. What is more serious is that the extubation will cause different degrees of urinary tract tissue. damage, causing infection and edema, often requiring emergency treatment.
(2) Due to various reasons, many patients will forget to extubate or delay extubation. Unabsorbable stents are left in the body for a long time to form urinary calculi. When they cannot be removed through the cavity, they have to be removed by open surgery. patient suffering and financial burden.
(3) Non-absorbable ureteral stents often cause some complications. With the prolongation of stent indwelling time, these materials begin to affect the urothelium and urine components, resulting in the formation of coatings, bacterial biofilms and Caused by infection, the common complications are: waist and abdomen pain, frequent urination, urgency, dysuria, hematuria and infection. This is all because the non-absorbable catheter causes a foreign body reaction in the body for a long time.
