CN212118359U - Drainage catheter for single-pig tail transplanted kidney stent - Google Patents

Abstract

The utility model relates to a kidney support drainage catheter is transplanted to single pigtail, including a straight line pipe part, pigtail tube part and screw interface, the screw interface can combine with urine drainage bag. The internal diameter of the pigtail tube part is 5.0mm-6.0mm, the thickness of the tube wall is 0.2mm-0.3mm, and liquid outlet holes are arranged on the tube wall at intervals. The length of the linear conduit part is 40cm-45cm, and scale marks are arranged on the linear conduit part; the first part is connected with the pigtail part, liquid outlet holes are formed in the pipe wall of the first part at intervals, and the pipe wall of the second part is closed and has no liquid outlet holes; the thickness and the inner diameter of the tube wall are equal to those of the pigtail tube part. The pigtail tube portion is made of a flexible material and comprises two spiral curls, the two spiral curls are in a spiral curling shape in a natural state, and the spiral curls become a straight shape when a linear guide wire is placed in the guide tube. The utility model provides a single-pig tail transplantation kidney support drainage catheter which is firm in fixation, convenient for external monitoring and convenient for removal.

Description

Drainage catheter for single-pig tail transplanted kidney stent

Technical Field

The utility model relates to a medical auxiliary instrument, in particular to a kidney stent drainage catheter for single-pig tail transplantation.

Background

Kidney transplantation is the most effective means for treating chronic renal insufficiency uremia. The main steps of the surgical operation include that the renal artery and vein are respectively anastomosed with the iliac vessel of the receiver, and the renal ureter is anastomosed with the bladder of the receiver. Wherein the transplanted hydronephrosis caused by urine leakage and ureteral stenosis due to the anastomosis surgical technique of the ureter and the recipient or the ischemic injury of the ureter is a serious complication after the kidney transplantation. Practice proves that the indwelling stent tube in the kidney transplantation can provide effective support for the kidney after transplantation and effectively drain and transplant kidney urine, thereby reducing the complications.

The clinical classification is divided into an inner stent tube and an outer stent tube. The internal support is a commonly used double pigtail tube, two ends of the internal support are respectively arranged in the transplanted renal pelvis and bladder, the internal support is fixed on the renal pelvis and bladder by means of pigtail tubes at two ends, and the internal support tube needs to be pulled out by using a cystoscope after one month of operation. Since urine is still extracted from the urethra of the patient, the clinical evaluation of the transplanted kidney function after the operation cannot be influenced because the uremia patient still has urine before the transplantation cannot accurately distinguish whether the urine volume is from the transplanted kidney. The external support is a straight tube without a pigtail, one end of the external support is placed in the renal pelvis during operation, and the other end of the external support is placed outside the body and fixed in a suture binding mode. The external stent has the advantages that the external stent can be pulled out after operation, and the invasive examination operation of the cystoscope is reduced. Another advantage is that the external stent tube is directly connected to the transplanted renal pelvis, so that the change of the urine volume of the transplanted kidney can be directly observed, and the function of the transplanted kidney can be conveniently and timely evaluated. The main defect of the outer stent tube is that the outer stent tube is bound and fixed by a suture, and the outer stent tube falls off accidentally due to the turning over, moving or loosening of the suture of a patient; and needs daily fixing and other maintenance and nursing, which consumes a great deal of medical care time. In addition, the external stent tube has no scale marks, and the external stent tube can not be accurately positioned due to the experience of a surgeon in the process of implanting the external stent tube into the transplanted renal pelvis, so that the operation effect is affected due to the fact that the stent drainage tube can not be accurately implanted into the transplanted renal pelvis. The external stent tube is commonly used in clinic without side holes, and the stent tube is blocked due to hematuria after kidney transplantation, so that the transplanted hydronephrosis is caused, and the recovery of the transplanted renal function is influenced.

Therefore, there is a particular need for a new renal stent graft drainage catheter for kidney use that solves the problems of the prior art.

Disclosure of Invention

The utility model aims at solving the defects of the prior drainage tube and providing a renal transplantation stent drainage catheter which has simple structure, good fixing effect, convenient external monitoring and renal transplantation and convenient removal.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a kidney stent drainage catheter for single-pigtail transplantation comprises a linear catheter part 1, wherein length scale marks 2 are arranged on the outer wall of the linear catheter part 1, one end of the linear catheter part 1 is connected with a pigtail tube part 3, the other end of the linear catheter part 1 is provided with a screw connector 4, and the pigtail tube part 3 and the linear catheter part 1 are communicated; the inner diameter of the pigtail tube part 3 is 5.0mm-6.0mm, the thickness of the tube wall is 0.2mm-0.3mm, and liquid outlet holes 5 are arranged on the tube wall at intervals; the length of the linear guide pipe part 1 is 40cm-45cm, the linear guide pipe part is divided into two parts, a first part 6 of the linear guide pipe part 1 is connected with the pigtail pipe part 3, the bending starting point of the pigtail pipe part 3 is taken as a calibration starting point, the first part 6 of the linear guide pipe part 1 is taken as the calibration starting point to a scale 10cm, liquid outlet holes 5 are formed in the pipe wall at intervals, and a second part 7 of the linear guide pipe part 1 is closed without liquid outlet holes from the scale 10cm to the tail end; the pipe wall thickness of the linear pipe part 1 is uniform and is the same as that of the pigtail pipe part 3; the inner diameter of which is the same as the inner diameter of the pigtail tube section 3.

Preferably, the pigtail tube portion 3 is made of a flexible material, and is in a natural state of a spiral coil shape, comprising two spiral coils, wherein the diameter of each spiral coil is 20mm-25 mm; the shape of the pigtail tube part 3 can be changed, when the linear guide wire is put in, the pigtail tube part 3 becomes linear, and after the linear guide wire is pulled out, the pigtail tube part 3 is reset to be in a natural state, namely, a spiral crimp shape.

Preferably, the screw interface 4 can be completely combined with a screw of a urine drainage bag for clinical application.

The invention has the beneficial effects that: firstly, the design of a liquid outlet hole of a drainage catheter section of a stent for implanting and transplanting a nephroureter greatly reduces the possibility of complete obstruction of a stent drainage tube. Secondly, the pigtail which is kept in the renal pelvis is spirally curled to have good fixing function, and the stent is fixed in the transplanted renal pelvis, thereby reducing the falling risk of the stent drainage tube. Third, the change in the urine volume of the draining transplanted kidney is directly monitored in vitro, thereby evaluating the change in the function of the transplanted kidney. Fourthly, the operation can be directly removed from the body after operation, thereby avoiding the invasive operation of the cystoscope. And fifthly, evaluating the length of the drainage stent tube in the body by observing the scale of the drainage tube, and judging whether the drainage stent tube is correctly positioned on the transplanted renal pelvis.

Drawings

Fig. 1 is a schematic structural view of the kidney stent drainage catheter for single-pigtail transplantation of the present invention.

The reference numerals of the drawings have the following meanings:

1: a linear conduit portion; 2: length scale lines; 3: pigtail tubing section; 4: a screw interface; 5: a liquid outlet hole; 6: a first portion of the in-line conduit portion; 7: a second part of the in-line conduit portion.

Detailed Description

Firstly, determining the pipe diameter of the implantation part of the drainage catheter of the transplanted kidney support. 300 donor kidneys are taken as research objects in 2016 to 2018 in 10 months in the center of transplantation, and the inner diameter of the donor kidney ureter is measured and recorded before transplantation after the donor kidney is removed and trimmed. The inner diameter of the ureter was found to be (4.8. + -. 1.4) mm. Therefore, the pipe diameter of the embedded part of the drainage catheter of the transplanted kidney stent is designed to be 5.0mm-6.0 mm.

Secondly, measuring the lengths of the ureter and the bladder to the body surface, and determining the length and the section of the renal stent implantation drainage catheter. Study this transplantation center 2016 performed 300 kidney transplants from 1 month to 10 months in 2018. The clinical finding shows that the length of ureter required to meet successful kidney transplantation is (14.5 + -3.9) cm. Meanwhile, the distance from the bladder to the skin surface was (9.3. + -. 3.6) cm. Therefore, the length of the implanted renal stent drainage catheter is designed to be 40cm-45cm, wherein 10cm of the implanted section is smaller than the implanted length of the implanted renal ureter, and the rest 30 cm-35 cm can meet the sum of the lengths of the bladder inner section, the bladder external surface and the external section.

And thirdly, according to the clinical research result, the specific structure of the kidney stent drainage catheter transplanted on the tail of a single pig is explained. As shown in fig. 1, a kidney stent drainage catheter for single pigtail transplantation comprises a linear catheter part 1, wherein length scale marks 2 are arranged on the outer wall of the linear catheter part 1, one end of the linear catheter part 1 is connected with a pigtail tube part 3, the other end of the linear catheter part 1 is provided with a screw connector 4, and the pigtail tube part 3 is communicated with the linear catheter part 1; the inner diameter of the pigtail tube part 3 is 5.0mm-6.0mm, the thickness of the tube wall is 0.2mm-0.3mm, and liquid outlet holes 5 are arranged on the tube wall at intervals; the length of the linear guide pipe part 1 is 40cm-45cm, the linear guide pipe part is divided into two parts, a first part 6 of the linear guide pipe part 1 is connected with the pigtail pipe part 3, the bending starting point of the pigtail pipe part 3 is taken as a calibration starting point, the first part 6 of the linear guide pipe part 1 is taken as the calibration starting point to a scale 10cm, liquid outlet holes 5 are formed in the pipe wall at intervals, and a second part 7 of the linear guide pipe part 1 is closed without liquid outlet holes from the scale 10cm to the tail end; the pipe wall thickness of the linear pipe part 1 is uniform and is the same as that of the pigtail pipe part 3; the inner diameter of which is the same as the inner diameter of the pigtail tube section 3. The design aims at judging the length of the transplanted renal pelvis after the catheter is inserted into the renal pelvis by marking scales, and is beneficial to quickly and accurately positioning the stent tube on the transplanted renal pelvis; and the length of the kidney-shaped implant is about 10-15cm longer than the length of the transplanted renal pelvis to the body surface, thereby being convenient for the clinical nursing requirement. The liquid outlet hole design greatly reduces the possibility of the bracket drainage tube being completely blocked due to hematuria and other reasons.

The pigtail tube part 3 is made of flexible material, is spirally curled naturally and comprises two spiral curls, and the diameter of the spiral curl is 20-25 mm; the shape of the pigtail tube part 3 can be changed, when the linear guide wire is put in, the pigtail tube part 3 becomes linear, and after the linear guide wire is pulled out, the pigtail tube part 3 is reset to be in a natural state, namely, a spiral crimp shape. The design aims at ensuring that the bracket drainage tube is in a linear state when a guide wire is inserted into a pigtail tube and is easy to be inserted into a ureter; after the guide wire is pulled out, the pigtail tube 3 is curled, so that the drainage stent tube is fixed on the transplanted renal pelvis to prevent falling off.

The screw interface 4 can be completely combined with a screw of a urine drainage bag for clinical application. The design is intended to improve clinical care efficiency.

And fourthly, the clinical application process of the kidney transplantation operation is described by taking one kidney transplantation operation as an example. In the kidney transplantation, after the renal blood vessels are matched with the blood vessels of a recipient, the transplanted renal ureter is trimmed according to the position of the kidney and the height of the patient, and the length of the renal ureter is measured by using the linear catheter part 1. The wall of the bladder is separated, and the wall of the bladder at the site of vesicoureteral anastomosis is incised, and a sharp opening is made in the anterior wall of the bladder. Placing a clinically common hydrophilic coating guide wire into the inner cavity of the drainage tube to enable the spiral section of the pigtail tube to be linear, wherein the pigtail tube part 3 is in a linear state; the pigtail tube part 3 of the bracket drainage tube is taken as the front end, the bracket drainage tube is placed into the bladder through a sharp opening on the front wall of the bladder, then the bladder is pulled out by cutting the bladder wall at the anastomotic position of the vesicoureteral tract, then the bracket drainage tube is placed into the transplanted renal pelvis in a retrograde direction, after the bracket drainage tube pigtail tube part 3 is completely placed into the transplanted renal pelvis, the hydrophilic coating guide wire in the bracket drainage tube is pulled out, so that the pigtail tube part 3 is spirally restored to be curled, and the drainage tube is fixed in the transplanted renal pelvis. And (4) visually observing the length scale mark 2 of the drainage stent tube, judging whether the length of the drainage stent tube is matched with the length of the transplanted nephroureter, and adjusting the length according to the condition. The implanted kidney ureter is matched with the bladder of a recipient in sequence, the position of the implanted kidney is placed, the stent drainage tube is pulled out of the body from the incision, the length scale mark 2 scale value of the stent drainage tube outside the incision skin is recorded, and the incision is sutured. The screw connector 4 of the bracket drainage tube is connected with the urine drainage bag. The daily drainage tube nursing can be completed by visually observing the length scale mark 2 scale values of the stent drainage tube after the operation, and the stent drainage tube is directly pulled out in vitro after 4 weeks after the operation.

Claims (3)

1. The drainage catheter for the kidney stent transplanted by the single pigtail is characterized by comprising a linear catheter part (1), wherein length scale marks (2) are arranged on the outer wall of the linear catheter part (1), one end of the linear catheter part (1) is connected with a pigtail tube part (3), the other end of the linear catheter part is provided with a screw connector (4), and the pigtail tube part (3) and the linear catheter part (1) are communicated; the inner diameter of the pigtail tube part (3) is 5.0mm-6.0mm, the thickness of the tube wall is 0.2mm-0.3mm, and liquid outlet holes (5) are arranged on the tube wall at intervals; the length of the linear guide pipe part (1) is 40cm-45cm and is divided into two parts, a first part (6) of the linear guide pipe part (1) is connected with the pigtail pipe part (3), the bending starting point of the pigtail pipe part (3) is taken as a calibration starting point, the first part (6) of the linear guide pipe part (1) is taken from the calibration starting point to a scale of 10cm, liquid outlet holes (5) are formed in the pipe wall at intervals, a second part (7) of the linear guide pipe part (1) is taken from the scale of 10cm to the tail end, and the pipe wall is closed without the liquid outlet holes; the pipe wall thickness of the linear pipe part (1) is uniform and is the same as that of the pigtail pipe part (3); the inner diameter of the tube is the same as that of the pigtail tube part (3).

2. A single pigtail transplant renal stent drainage catheter as in claim 1, wherein the pigtail tube section (3) is made of a flexible material, being in a natural state of a helical coil comprising two helical coils having a diameter of 20mm to 25 mm; the shape of the pigtail tube part (3) can be changed, when the linear guide wire is placed in the pigtail tube part (3) becomes linear, and after the linear guide wire is pulled out, the pigtail tube part (3) is reset to be in a natural state, namely, a spiral winding shape.

3. The single pigtail transplant renal stent drainage catheter of claim 1, wherein the screw port (4) can be completely combined with a screw of a urine drainage bag for clinical application.

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