CN101703416A - Bile duct puncturing needle - Google Patents

Abstract

The invention discloses a bile duct puncture needle, which comprises an injection part and a guide part. The injection part includes a Luer connector and a diversion tube. The proximal end of the diversion tube is connected with the Luer connector, and a needle tube is arranged at the far end of the diversion tube. ; The guide part includes a guide tube that is emptied outside the guide tube, the proximal end of the guide tube is connected to a hand-held guide component, and the far end of the guide tube can cover the far end of the guide tube; A guide wire is provided, the proximal end of the guide wire passes through the Luer connector, and the distal end of the guide wire can pass through the needle tube; wherein, the guide tube and the flow guide tube are both flexible tubes, and the needle tube is made of metal with a puncture needle point Tube. The technical scheme can realize the direct puncture of the bile duct and put the guide wire into the bile duct, so as to avoid pancreatitis caused by passing through the ampulla of the duodenum.

Description

A kind of bile duct puncture needle

technical field

The invention belongs to a medical device, in particular to a biliary tract puncture needle for duodenal endoscopic surgery, also known as a Gong-type needle.

Background technique

With the improvement of science and technology and the development of humanistic medicine, the concept of microtrauma is increasingly being applied clinically. How to use as little trauma as possible to achieve the doctor's treatment purpose has become a topic that is often involved. As far as the difficult point in the digestive system—pancreaticobiliary system disease is concerned, its minimally invasive technology is becoming more and more mature, and it has been involved in various aspects of diagnosis and treatment.

Biliary tract or pancreatic duct system disease is a common clinical disease in our country, especially with the acceleration of the pace of life, this kind of disease has become more and more prominent. In the past, surgery was often used for treatment, but it has the disadvantages of large trauma, many complications and easy recurrence. , Many patients have received multiple surgical treatments due to recurrence of stones, causing great physical and mental damage. With the development of clinical endoscopic technology, endoscopic retrograde cholangiopancreatography to remove common bile duct stones has been widely used in clinic.

Endoscopic retrograde cholangiopancreatography, abbreviated as ERCP, is a technique for diagnosing and treating related diseases by performing retrograde imaging of the pancreas and cholangiopancreatography through a duodenoscope. It has important diagnostic value for gallstones, tumors, injuries, strictures, and deformities. This project has more intuitive images than B-ultrasound, CT and other imaging examinations. A series of accessory instruments used in this operation usually include: guide wire, incision knife, stone removal balloon, expansion balloon, stone removal mesh basket, contrast catheter, plastic stent and metal stent, etc. Other typical indications include: unexplained obstructive jaundice with suspected extrahepatic biliary obstruction; suspected various biliary diseases such as stones, tumors, sclerosing cholangitis, etc.; suspected congenital biliary abnormalities or Patients with recurrence of symptoms after cholecystectomy; pancreatic diseases: pancreatic tumors, chronic pancreatitis, pancreatic cysts, etc.

Endoscopic retrograde cholangiopancreatography, because its object is in the special position of the human body—the pancreaticobiliary system, is a relatively complicated and difficult operation in China. Due to the special physiological position of the pancreaticobiliary system, the position is narrow and the endoscopic Do not look straight down. As a result, conventional gastrointestinal digestive system devices cannot be directly applied to the pancreaticobiliary system. Routine operation process is all through duodenal papilla intubation angiography, passes through guide wire to do relevant treatment, often will bring pancreatitis complication like this.

As shown in Figure 1, the existing surgical procedure is realized through the following steps:

1) Preoperative preparation;

2) Insert a duodenoscope to find the position of the duodenal nipple;

3) Insert the guide wire through the clamp channel of the duodenoscope, and search for the expected positions such as the duodenal papilla, bile duct or pancreatic duct.

The above-mentioned operation process is relatively common in clinical application at present, but one defect is that it often leads to the occurrence of pancreatitis complications. Its clinical manifestations are usually: postoperative blood amylase rises more than 500 Soxhlet units, and upper and middle abdominal pain persists for more than 24 hours. Abdominal pain with nausea, vomiting, left upper quadrant tenderness, with or without muscle tension. Abdominal B-ultrasound and CT examination showed that the pancreas was obviously enlarged, the surrounding edema was obvious, the gap disappeared, adhesions, and bubbly liquefied necrotic cavities could be seen in the pancreatic parenchyma.

A puncture hardening needle that has been used clinically, mainly enters the digestive tract or gastrointestinal tract through the endoscope forceps, injects the gastrointestinal mucosa, and introduces hardening or hemostatic drugs into the selected area through the endoscope to treat the existing digestive system. Bleeding or potential bleeding points are controlled, and it is used as a medical device for the injection of normal saline after endoscopic mucosal examination and polypectomy. Most of the clinical indications are: hemostasis for gastrointestinal bleeding; sclerotherapy of varicose veins; staining of diseased tissues technology; and other purposes of injecting drugs into the inner wall of the human cavity, etc. At present, this device is widely used in clinical practice, and there are millions of cases of sclerosing injections in the country every year.

Contents of the invention

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a bile duct puncture needle, which can directly puncture the bile duct and put the guide wire into the bile duct, so as to avoid pancreatitis caused by passing through the ampulla of the duodenum.

To achieve the above object, the present invention adopts the following technical solutions:

A biliary puncture needle, comprising an injection part and a guide part, the injection part includes a Luer connector and a guide tube, the proximal end of the guide tube is connected to the Luer connector, and a needle tube is arranged at the far end of the guide tube; the guide Part of it includes a guide tube that is sheathed outside the guide tube, the proximal end of the guide tube is connected to a hand-held guide component, and the distal end of the guide tube can cover the distal end of the guide tube; a guide wire is threaded inside the guide tube , the proximal end of the guide wire passes through the Luer connector, and the distal end of the guide wire can pass through the needle tube; wherein, both the guide tube and the flow guide tube are flexible tubes, and the needle tube is a metal tube with a puncture needle point.

As a preference, the front end of the Luer connector is fixedly connected with a metal conduit, the front end of the metal conduit is connected to the diversion tube, the guide part is vacantly sleeved on the metal conduit, the front end of the guide part is fixedly connected with a metal connecting tube, and the metal connecting tube is sleeved and fixed. the proximal end of the guide tube. It is more convenient to adjust by using metal conduit guide parts, and it is convenient to install by using metal connecting pipes.

Preferably, an adjustment component is sheathed on the metal conduit between the Luer connector and the guide component, and the adjustment component is threadedly connected to the guide component. One end of the adjustment component is threadedly connected to the guide component, and the other end can be connected to the Luer connector through a buckle structure. Setting the adjusting part can adjust the protruding length of the needle tube, which is convenient for doctors to operate.

Preferably, a limiting component is provided between the above-mentioned Luer connector and the adjusting component to limit the distance between the two. The limiting part can prevent the outer sheath of the needle tube from piercing the packaging bag during packaging and transportation, resulting in damage to the product packaging.

The above-mentioned needle tube is fixed on the far end of the guide tube through the socket tube. The needle tube is passed through the distal end of the diversion tube, and the outer surface of the distal end of the diversion tube is locked and fixed by a sleeve, which is convenient for processing and reliable connection.

The guide tube is covered with a protective sleeve.

Due to the adoption of the above technical scheme, the present invention can directly puncture the bile duct and put the guide wire into the bile duct for subsequent surgical treatment operations, avoiding pancreatitis caused by passing through the ampulla of the duodenum.

Description of drawings

Figure 1: Schematic diagram of the existing clinical operation of the pancreaticobiliary system;

Fig. 2: Schematic diagram of clinical operation application of pancreaticobiliary system of the present invention;

Fig. 3: structural representation of the present invention;

Figure 4: Partial enlarged view of I in Figure 3;

Figure 5: Partial enlarged view of II in Figure 3;

Detailed ways

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

A bile duct puncture needle as shown in Figures 3 to 5, including an injection part and a guide part, the injection part includes a Luer connector 2 and a guide tube 11, and the proximal end of the guide tube 11 is connected to the Luer connector 2 , the distal end of the guide tube 11 is provided with a needle tube 9; the guide part includes a guide tube 8 that is empty outside the guide tube 11, the proximal end of the guide tube 8 is connected to a hand-held guide member 6, and the far end of the guide tube 8 The end can cover the distal end of the guide wire 11; the guide wire 1 is pierced inside the guide tube 11, the proximal end of the guide wire 1 passes through the Luer connector 2, and the distal end of the guide wire 1 can pass through the needle tube 9; Wherein, the guide tube 8 and the guide tube 11 are flexible pipes, and the needle tube 9 is a metal tube with a puncture needle point.

In this embodiment, the front end of the Luer connector 2 is fixedly connected with a metal catheter 4, and the front end of the metal catheter 4 is connected to the guide tube 11. Connecting tube 10, the proximal end of the fixed guide tube 8 is sleeved on the metal connecting tube 10; the metal conduit 4 between the Luer connector 2 and the guiding component 6 is covered with an adjusting component 5, and the adjusting component 5 and the guiding component 6 are threaded connect. One end of the adjustment member 5 is threadedly connected to the guide member, and the other end can be connected to the Luer connector 2 through a buckle structure. The metal conduit 4 between the Luer connector 2 and the adjusting component 5 is clamped with a limiting component 3 that limits the distance between the two. The needle tube 9 is fixed on the distal end of the guide tube 11 through a socket tube 12 . The proximal end of the guide tube 8 is sheathed with a protective sleeve 7 for protecting the joint between the metal tube and the flexible tube.

The Luer connector is a quick connector for connecting the syringe. In this embodiment, a 6% inner conical Luer connector can be used in conjunction with the syringe; needle tubes of various specifications can puncture mucosal tissues, and the overall lumen is a drug channel for introducing Drugs to be injected are mainly made of medical grade ABS and medical grade stainless steel. The Gong-style needle reaches the expected position of the human body through the clamp channel of the endoscope. It has different needle tube materials, and the specifications and length of the needle tube are also selected according to clinical needs. All parts are based on the outer diameter of the guide wire to design the relevant interface size to ensure that the guide wire can pass through smoothly and the substance can be injected.

As shown in Figure 2, the operation steps of the present invention are as follows:

1) Preoperative preparation;

2) Insert the duodenoscope, and look for the position where it enters the descending part of the duodenum.

3) Insert the Gong-style needle of this instrument through the forceps channel of the duodenoscope, find the position of the nipple in the descending segment, and align the guide tube 8 with the wall of the bile duct. Hold the guide part 6, remove the stopper part 3, draw the guide wire 1 back to the far end invisible, connect the Luer connector 2 and the adjustment part 5, and rotate the adjustment part 5 clockwise, then it will carry The injection part where the Luer connector 2 is located moves to the distal end together, and the needle tube 9 where the distal end of the injection part is located will gradually expose the guide tube 8 and penetrate into the bile duct. On the contrary, if the adjustment part 5 is rotated counterclockwise, it will move to the proximal end together with the injection part where the Luer connector 2 is located, and the needle tube 9 where the distal end of the injection part is located will gradually retract into the guide tube 8;

4) Push the guide wire 1 into the bile duct through the needle tube 9 (confirm on the X-ray screen that it has entered the bile duct);

5) Keep the guide wire 1 still, and pull out the endoscope from other parts;

6) After the guide wire enters the bile duct, other ERCP instruments can enter along the guide wire to perform related operations.

Under the endoscope, the guide wire device enters the pancreaticobiliary system, and when it is necessary to inject drugs after diagnosis, the distal end of the injection part (needle) is penetrated from the end of the guide wire, along the guide wire to the expected position, and then the drug is injected. achieve the purpose of treatment.

The above-mentioned embodiments are used to illustrate the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

Claims (7)

1. A biliary puncture needle, comprising an injection part and a guide part, is characterized in that the injection part comprises a Luer connector (2) and a guide tube (11), and the proximal end of the guide tube (11) is connected to the Luer tube. The joint (2) is connected, and the distal end of the guide tube (11) is provided with a needle tube (9); The end is connected with a guide part (6) for hand-holding, and the far end of the guide tube (8) can cover the far end of the guide tube (11); the guide wire (1) is pierced in the guide tube (11), The proximal end of the guide wire (1) passes through the Luer connector (2), and the distal end of the guide wire (1) can pass through the needle tube (9); wherein, the guide tube (8) and the drainage tube (11) are both It is a flexible pipe, and the needle tube (9) is a metal tube with a puncture needle point. 2. A bile duct puncture needle according to claim 1, characterized in that, the front end of the Luer connector (2) is fixedly connected with a metal catheter (4), and the front end of the metal catheter (4) is connected to the guide tube (11) , the guide part (6) is vacantly sleeved on the metal conduit (4), the front end of the guide part (6) is fixedly connected with a metal connecting pipe (10), and the metal connecting pipe (10) is sleeved with the fixed guide pipe (8) near end. 3. A bile duct puncture needle according to claim 2, characterized in that, the metal conduit (4) between the Luer connector (2) and the guide member (6) is covered with an adjustment member (5), The adjustment part (5) is threadedly connected with the guide part (6). 4. A bile duct puncture needle according to claim 3, characterized in that one end of the adjustment member (5) is threadedly connected to the guide member, and the other end can be connected to the Luer connector (2) through a buckle structure. 5 . A bile duct puncture needle according to claim 4 , characterized in that, a limiting component ( 3 ) for limiting the distance between the Luer connector ( 2 ) and the adjusting component ( 5 ) is provided. 6. A biliary puncture needle according to any one of claims 1 to 5, characterized in that the needle tube (9) is fixed at the distal end of the drainage tube (11) through a socket tube (12). 7. A bile duct puncture needle according to any one of claims 1 to 5, characterized in that a protective sleeve (7) is sheathed on the guide tube (8).

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