What Is a Double J Stent?

Double J tube (pig tail catheter), introduction and technical indicators This project uses absorbable thermoplastic elastomers to make ureteral stent tubes, replacing non-absorbable stent tubes commonly used in clinical practice, avoiding secondary surgical extraction, and reducing patient pain. This project Innovation in the field of urology.

Double J tube

1. The material is polyurethane, which has strong aging resistance, good histocompatibility, non-toxicity, extremely smooth surface, and small crust tendency.

2. Good flexibility, elasticity, large inner diameter, large tube diameter, tube wall thickness, large drainage volume, suitable tube diameter, will not move up and down, X-ray can be developed.

3. Tiemann tip for easy access to the ureter. Using polyurethane material, soft, high elasticity, many side holes, large flow, not easy to deform, stent is smooth, easy to pass through the ureter, good biocompatibility, no damage to the tissue, no stimulation, no blockage, X-ray radiation is fully developed Easy to check.

4,. Model: double tail, single tail, the outer diameter of the catheter is 4F, 5F, 6F, 7F, 8F.

5. Composition: urinary catheter stent, booster tube, guide wire, etc.

6. Length: 15, 22, 24, 26, 28, 30

7, product types: there are medium-sized, hippocampal tube, double-end opening, single-end opening, kidney transplantation tube and other varieties.

Product features of this project:

1. Soft and highly elastic: the tensile strength of the material is> 15MPa, and the elongation at break is> 300%.

2. Biosafety: Non-toxic and biosafety.

The ureteral stent tube (double pigtail catheter, or DJ tube) is widely used in urological surgery, suitable for kidney stones,

(1) The anti-reflux effect of the ureteral orifice disappeared after the catheter was placed, and conventional indwelling catheterization was applied for 5 to 7 days after the operation.

(2) Double J tube drainage, urine crystals are easily adsorbed on the surface of the urinary tube to form urinary salt deposits, which block the lumen and cause poor drainage of urine; postoperative drinking water and acidify the urine.

(3) Comprehensive prevention measures such as high-quality double-J pipes with smooth walls are selected.

(4) Generally, it cannot be left for more than three months, otherwise the catheter may be deteriorated, easily broken, and difficult to remove or generate stones.

Since Finney first used the double J stent tube in clinic in 1978, the double J tube has been widely used in kidney, ureter and bladder surgery in urology.

In previous renal pelvis or ureteral surgery, in order to prevent anastomotic stenosis, a renal pelvis, nephrostomy, or a stent such as a urinary catheter was used as an internal stent. There are many disadvantages of external drainage, which not only restricts the patient's activities, but also easily causes catheters to fall off and easily cause infection. The management of the external catheter is very inconvenient, and the postoperative management is cumbersome. The length of hospital stay is about 25 days on average. The use of the double J tube avoids a series of problems caused by external drainage.

Advantages of double J tube drainage:

(1) The use of double J tube drainage during the operation of the renal pelvis and ureter simplifies the postoperative management of the patient. Because the catheter can be moved early, the patient can reduce the chance of infection, the nursing workload is significantly reduced, and the patient recovers quickly. The length of hospital stay was significantly reduced.

(2) Due to the advancement of the double J tube in the acquisition of materials, the tube is soft and non-corrosive, the surface is smooth, the inner diameter is large, the tube wall is thin, and the bendability is good. The upper and lower portions are curved in the renal pelvis and bladder, which is not easy to fix. Moving up and down, the patient feels comfortable with the tube, and the catheter has a good dilatation effect, which can be indwelled for a long time, which is beneficial to reduce hydronephrosis and prevent the ureter from being narrowed again.

(3) The double J tube is easy to put in and take out. If the ureteral stenosis is not serious, the tube can be expanded and drained under cystoscope.

(4) Double J-tube as an adjuvant treatment of kidney and ureteral stone extracorporeal lithotripsy, which can prevent the occurrence of incarcerated stone streets and block larger residual stones from falling into the ureter; it can relax the ureter moderately, and the urine can pass the wall effect along the wall. The stent is drained to the bladder to keep the urinary tract unobstructed; when the stent is removed, the stone powder and small particles accumulated on the wall of the tube can be taken out together to promote the drainage of stones.

Clinical data show:

(1) Double J tube drainage is an ideal method for treating hydronephrosis caused by upper urinary tract obstruction. It has the advantages of simple method, short hospital stay, and low postoperative infection rate.

(2) Double J tube drainage, the incidence of postoperative urinary tract complications was significantly reduced.

(3) For patients with ureteral calculi, due to the long-term stimulation of calculi, the ureteral mucosa often has inflammatory hyperplasia and even polyps formation. After the incision and removal of stones, complications such as continuous leakage and stenosis are prone to occur. After placing the double J tube, Due to the dual effects of internal drainage and internal stent, urine leakage can be prevented or shortened, and stenosis can be prevented.

(4) The double J tube has a better supporting effect, and the closed drainage is smooth, which can avoid the disadvantages of prone to infection caused by nephrostomy or ureteral stent, and it can be placed conventionally.