Percutaneous kidney puncture guide wire

Abstract

The percutaneous renal puncture guide wire comprises a nickel-titanium alloy wire, a polishing area is arranged at the tail of the nickel-titanium alloy wire, the diameter of the polishing area is smaller than that of other areas of the nickel-titanium alloy wire, a spring winding wire is connected to the polishing area in a sleeved mode, and a bent part is arranged at the tail of the polishing area. Teflon coatings are coated on the 2-5mm surface of the front end of the nickel-titanium alloy wire and the 2-5mm surface of the front end of the spring winding wire. The defects in the prior art can be overcome, and the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to a medical device, in particular to a percutaneous renal puncture guide wire. Background Art

[0002] According to medical guidelines, in the human urinary system, if the stones in the renal pelvis are larger than 3 centimeters, percutaneous renal puncture minimally invasive laser lithotripsy is required. The stone position is located under B-ultrasound, which reflects the surgical puncture point on the skin. A small incision is made at the puncture point with a scalpel, and the 18G puncture needle is used to puncture the stone position. The puncture needle core is pulled out, and at the same time, fluid is seen flowing out of the needle hole, proving that the puncture is in place. The soft end of the zebra guide wire or the elbow end of the spring guide wire is then inserted into the renal pelvis. The puncture needle is then withdrawn, leaving the guide wire in the designated position. The dilation tube is then used to gradually expand along the guide wire to the dilation sheath reservation, and the last dilation tube and guide wire that match the sheath are then withdrawn. The minimally invasive instrument placement channel for percutaneous renal laser lithotripsy is formed; laser optical fiber and other instruments are introduced through the dilation sheath channel for lithotripsy, and the laser is withdrawn after lithotripsy is completed. Optical fiber and other instruments are used, a fistula drainage tube is left in place, the dilation sheath is torn open and removed, the fistula drainage tube is fixed, the drainage bag is connected, and the operation is completed. At present, the most commonly used guide wires in clinical practice are spring guide wires or zebra guide wires. When spring guide wires are made, the front soft head is made of titanium-nickel alloy wire, the rear end is made of stainless steel wire, and the middle connection is welded. It is very easy to break during surgery, and many medical accidents have been recorded in clinical practice. The zebra guide wire is too soft as a whole, and it is very easy to lose the puncture and dilation channel during surgery, causing the surgical channel to deviate from the stone position during puncture, increasing the risk of surgical failure, and cannot effectively and accurately ensure that the puncture and dilation channel is not lost, and cannot effectively ensure the smooth and safe completion of the operation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a percutaneous renal puncture guide wire, which can solve the deficiencies of the prior art and improve the safety of the operation.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0005] A percutaneous renal puncture guide wire comprises a nickel-titanium alloy wire, a grinding area is arranged at the tail of the nickel-titanium alloy wire, the diameter of the grinding area is smaller than the diameter of other areas of the nickel-titanium alloy wire, a spring wire is sleeved on the grinding area, a bending portion is arranged at the tail of the grinding area, and a Teflon coating is coated on the front end of the nickel-titanium alloy wire and the 2mm to 5mm surface of the front end of the spring wire.

[0006] Preferably, the length of the grinding area is 5 cm to 10 cm, and the diameter of the grinding area is not less than 0.15 mm.

[0007] Preferably, the length of the bending portion is 1.5 cm to 2 cm, and the width of the bending portion is 0.5 cm to 0.75 cm.

[0008] A manufacturing method of the percutaneous nephrolithotomy guide wire as described above, comprising the following steps:

[0009] A. Take a nitinol wire, and polish the position 5 cm - 10 cm from the tail of the nitinol wire on a grinding machine to form a polished area. The polishing method is to gradually shrink in a trapezoidal or rhomboid shape, and the diameter of the polished area is not less than 0.15 mm;

[0010] B. Take a length of 1.5 cm - 2 cm at the end of the polished area and bend it into a bent part. The width of the bent part is 0.5 cm - 0.75 cm;

[0011] C. Take a spring wire and sleev it on the front end of the polished area, and weld the two ends of the spring wire to the polished area using solder with a melting point not lower than 500 °C or plasma welding;

[0012] D. Coat the surface of the front end of the nitinol wire and the front end of the spring wire with a 2 mm - 5 mm Teflon coating;

[0013] E. Sterilize the manufactured percutaneous nephrolithotomy guide wire by ethylene oxide sterilization method, and then package and store it in a polyethylene fiber paper bag.

[0014] The beneficial effects brought by adopting the above technical solutions are as follows: By using a spring wire in the present utility model, it can be visualized under B-ultrasound or X-ray, enabling effective and accurate positioning. Clinicians can observe that the bent part of the guide wire has reached the position of the renal pelvic calculus safely and accurately, effectively preventing puncture damage to the inner wall of the renal pelvis when the front end of the guide wire is inserted into the renal pelvis. The entire guide wire is made of all nitinol wire, with strong memory, not prone to folding or bending, and even less likely to break, ensuring high surgical safety. The Teflon coating improves the smoothness and hardness of the nitinol wire, preventing the loss of the dilation channel during the gradual dilation of the dilator, and ensuring that the surgical channel is accurately aligned with the position of the calculus during puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of a specific embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Referring to Figure 1 , the percutaneous nephrolithotomy guide wire described in the present utility model includes a nitinol wire 1. A polished area 2 is provided at the tail of the nitinol wire 1. The diameter of the polished area 2 is smaller than that of other areas of the nitinol wire 1. A spring wire 3 is sleeved on the polished area 2. A bent part 4 is provided at the tail of the polished area 2. The surface of the front end of the nitinol wire 1 and the front end of the spring wire 3 with a length of 2 mm - 5 mm is coated with a Teflon coating.

[0017] A manufacturing method of the percutaneous nephrolithotomy guide wire as described above, comprising the following steps:

[0018] A. Take a nitinol wire 1 and polish it on a grinding machine at a position 5 cm to 10 cm from the tail of the nitinol wire 1 to form a polished area 2. The polishing method is to gradually narrow in a trapezoidal or oblique shape, and the diameter of the polished area 2 is not less than 0.15 mm;

[0019] B. Take a length of 1.5 cm to 2 cm at the end of the polished area 2 and bend it into a bent part 4. The width of the bent part 4 is 0.5 cm to 0.75 cm;

[0020] C. Take a spring winding wire 3 and sleev it on the front end of the polished area 2. Use solder or plasma welding with a melting point not lower than 500 °C to weld both ends of the spring winding wire 3 to the polished area 2;

[0021] D. Coat the surface of the front end of the nitinol wire 1 and the front end of the spring winding wire 3 with a Teflon coating for 2 mm to 5 mm;

[0022] E. Sterilize the manufactured percutaneous nephrolithotomy guide wire by ethylene oxide sterilization method, and then store it in a polyethylene fiber paper bag.

[0023] A special percutaneous nephrolithotomy guide wire manufactured by the above method is used to treat patients, and the treatment cases are as follows:

[0024] Treatment Case 1

[0025] Male patient, 60 years old, with frequent colic in the right waist, suspected of right kidney distension caused by kidney stones. After examination, it was found by X-ray film that there was a 3.25 * 2.5 stone in the right kidney. After clinical treatment after admission, a minimally invasive percutaneous nephrolithotomy laser lithotripsy was performed two days later. The clinical doctor located the stone position under B-ultrasound, determined the surgical puncture point, made a small incision at the puncture point with a scalpel, punctured to the stone position with an 18G puncture needle, pulled out the puncture needle stylet, and at the same time saw fluid flowing out of the needle hole. Then, the bent end J (bent part) of the special percutaneous nephrolithotomy guide wire was inserted into the puncture needle to the renal pelvis through a straightener. As shown by B-ultrasound, the bent end J of the special percutaneous nephrolithotomy guide wire was successfully placed at the right kidney stone in the renal pelvis, and no damage or bleeding to the inner wall of the renal pelvis was found due to the special percutaneous nephrolithotomy guide wire. Then, the puncture needle was withdrawn, and then the dilation tubes of 8F, 10F, 12F, 14F, 16F, 18F, and 20F were used to gradually dilate along the special percutaneous nephrolithotomy guide wire until the dilation sheath was reserved. Then, the last 20F dilation tube matching the sheath and the special percutaneous nephrolithotomy guide wire were withdrawn, and the minimally invasive instrument placement channel for percutaneous nephrolithotripsy was formed; after examination, the channel was accurate. Laser fiber and other instruments were introduced through the 20F dilation sheath channel for lithotripsy. Large stones were removed through a stone retrieval basket. After lithotripsy, the laser fiber and other instruments were withdrawn, a fistula drainage tube was indwelled, the dilation sheath was torn and removed, the fistula drainage tube was fixed, and a drainage bag was connected, and the operation was completed.

[0026] Treatment Case 2

[0027] A 48-year-old female patient had a complete staghorn calculus in the left kidney, measuring 3.15*2.58, complicated with Proteus mirabilis infection. After clinical treatment upon admission, a minimally invasive percutaneous nephrolithotomy laser lithotripsy was performed three days later. The clinician located the position of the calculus under B-ultrasound, determined the surgical puncture point, made a small incision at the puncture point with a scalpel, punctured the 18G puncture needle to the position of the calculus aiming at the calculus, withdrew the stylet of the puncture needle, and at the same time saw fluid flowing out of the needle hole. Then, the J end (bent part) of the special guide wire for percutaneous nephrolithotomy was inserted into the puncture needle through a straightener to the renal pelvis. As shown by B-ultrasound, the J end of the special guide wire for percutaneous nephrolithotomy was successfully placed at the right renal calculus of the renal pelvis, and no damage or bleeding to the inner wall of the renal pelvis was found by the special guide wire for percutaneous nephrolithotomy. Then, the puncture needle was withdrawn, and then the dilators 8F, 10F, 12F, 14F, 16F, 18F were used to gradually dilate along the special guide wire for percutaneous nephrolithotomy until the dilation sheath was reserved. Then, the last 18F dilator matching the sheath and the special guide wire for percutaneous nephrolithotomy were withdrawn, and the minimally invasive instrument placement channel for percutaneous nephrolithotripsy was formed; after examination, the channel was accurate. Laser fibers and other instruments were introduced through the 18F dilation sheath channel for lithotripsy. Larger calculi were removed through a stone retrieval basket. After lithotripsy was completed, the laser fibers and other instruments were withdrawn, a fistula drainage tube was indwelled, the dilation sheath was torn off and removed, the fistula drainage tube was fixed, and a drainage bag was connected, and the operation was completed.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A percutaneous renal puncture guide wire, characterized in that: The invention comprises a nickel-titanium alloy wire (1), wherein a grinding area (2) is arranged at the tail of the nickel-titanium alloy wire (1), the diameter of the grinding area (2) is smaller than the diameter of other areas of the nickel-titanium alloy wire (1), the grinding area (2) is sleeved with a spring winding wire (3), a bending part (4) is arranged at the tail of the grinding area (2), and a 2 mm to 5 mm surface of the front end of the nickel-titanium alloy wire (1) and the front end of the spring winding wire (3) is coated with a Teflon coating.

2. The percutaneous renal puncture guidewire according to claim 1, characterized in that: The length of the grinding area (2) is 5 cm to 10 cm, and the diameter of the grinding area (2) is not less than 0.15 mm.

3. The percutaneous renal puncture guidewire according to claim 2, characterized in that: The length of the bending portion (4) is 1.5 cm to 2 cm, and the width of the bending portion (4) is 0.5 cm to 0.75 cm.

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