CN209347170U - Hepatobiliary tract puncture kit - Google Patents

Abstract

The utility model provides a hepatobiliary puncture kit, comprising: a puncture needle assembly and a catheter sheath; the catheter sheath includes a double-pass connecting part, a sheath tube and a side tube; The connecting part communicates with each other; the catheter sheath is provided with a catheter cavity for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the catheter sheath through the catheter cavity. In the present invention, a double-pass is arranged on the catheter sheath, and the sheath tube and the side tube are communicated through the double-pass connecting part, so that when the puncture operation is performed, the guide wire can be kept without removing it, and the side tube can be used for the operation. The injection of the contrast agent realizes the lateral tube angiography, which avoids the failure of the puncture caused by the prolapse of the bile duct caused by the removal of the guide wire during the operation of the puncture operation, which brings great convenience to the doctor's puncture angiography.

Description

A hepatobiliary puncture kit

technical field

The utility model belongs to the technical field of medical devices, in particular to a hepatobiliary puncture kit.

Background technique

Puncture is a term used for medical surgery. It is a diagnosis and treatment technique in which a puncture needle is inserted into a body cavity to extract secretions for testing, gas or contrast agent is injected into the body cavity for contrast examination, or drugs are injected into the body cavity. The purpose of puncture is to draw blood for testing, blood transfusion, fluid infusion and catheter placement for angiography.

The common causes of obstructive jaundice are cholangiocarcinoma, cholelithiasis, etc. These patients often have a longer onset time, but the yellowing time of the body and eyes is shorter, and the liver function is often damaged. Percutaneous transhepatic cholangial drainage (PTCD) is life-saving for such patients. One-step puncture technique is often used in PTCD commonly used in clinical practice. This method has the advantages of no exchange and short puncture time. However, the puncturing device also has certain disadvantages.

In the existing puncture device of the one-step puncture method, when the puncture successfully enters the outer sheath along the guide wire, if you want to further angiography, you need to take out the guide wire in the outer sheath. The biliary tract leads to the failure of puncture, which brings great inconvenience to the doctor's puncture angiography, and brings the safety hidden danger of the operation failure to the patient to a certain extent.

Utility model content

In order to solve the above problems, the utility model provides a hepatobiliary puncture kit, comprising:

Needle assemblies and introducer sheaths;

The catheter sheath includes a double-pass connecting part, a sheath tube and a side tube;

The sheath tube and the side tube are communicated through the double-pass connecting portion;

The catheter sheath is provided with a catheter lumen for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the catheter sheath through the catheter lumen.

Preferably, the catheter sheath further comprises an anti-reverse valve provided on the double-way connecting portion;

The anti-reverse valve is arranged at one end of the double-way connecting portion corresponding to the sheath tube.

Preferably, the hepatobiliary puncture kit further comprises a dilator;

The dilator includes an expansion tube, an expansion base connected with the expansion tube, and a clip provided on the expansion base;

The outer diameter of the dilator is smaller than the inner diameter of the sheath;

The dilator is detachably connected to the catheter sheath through the catheter lumen;

The dilator is provided with a dilation cavity for the puncture needle assembly to penetrate;

When the dilator is inserted into the catheter sheath, the latching member is latched with the anti-reverse valve.

Preferably, the introducer sheath is a 5Fr introducer sheath.

Preferably, the puncture needle assembly further comprises an external puncture needle and a removable needle core;

The external puncture needle is provided with a puncture cavity for the removable needle core to penetrate, and the removable needle core is detachably connected to the external puncture needle through the puncture cavity;

The removable needle core can move in the puncture cavity along the length direction of the outer puncture needle.

Preferably, the hepatobiliary puncture kit further comprises a guide wire;

The outer diameter of the guide wire is smaller than the inner diameter of the puncture cavity of the external puncture needle, so that after the removable needle core is drawn out, the guide wire replaces the removable needle core and penetrates into the puncture cavity .

Preferably, the outer diameter of the guide wire is 0.05-0.1 cm;

The length of the guide wire is 50 cm.

Preferably, the external puncture needle comprises a needle seat, a connecting tube and a needle tube which are connected in sequence;

A needle is provided at one end of the needle tube facing away from the connecting tube.

Preferably, the external puncture needle further comprises a movable valve arranged on the needle tube and movable along the length direction of the needle tube;

The movable valve is used to mark the puncture length of the needle tube.

Preferably, a scale is provided on the outside of the needle tube for measuring the puncture distance of the needle tube.

The utility model provides a hepatobiliary puncture kit, comprising: a puncture needle assembly, a dilator and a catheter sheath; the catheter sheath includes a double-pass connection part, a sheath tube and a side tube; the sheath tube and the side tube pass through the The two-way connecting part communicates with each other; the catheter sheath is provided with a catheter cavity for the dilator to penetrate, and the dilator is detachably connected to the catheter sheath through the catheter cavity; the dilator is provided with There is a dilation cavity for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the dilator through the dilation cavity. By arranging a double-pass on the catheter sheath, and connecting the sheath tube and the side tube through the double-pass connecting portion, the contrast agent can be injected through the side tube without removing the guide wire during the puncture operation. The injection is used to realize lateral tube angiography, which avoids the failure of puncture caused by prolapse of the bile duct caused by the removal of the guide wire during the puncture operation, and brings great convenience to the doctor's puncture angiography.

Description of drawings

FIG. 1 is a schematic diagram of the combined structure of the cored puncture assembly in the application; wherein, a partial enlarged view of the component 114 is included;

Fig. 2 is the structural representation of the guide wire of the hepatobiliary puncture kit in the application;

Fig. 3 is the partial enlarged structural schematic diagram of the external puncture needle of the hepatobiliary puncture kit in the application;

4 is a schematic view of the thread connection between the needle core base and the needle seat in the application;

5 is a schematic diagram of the overall connection structure of the hepatobiliary puncture kit in the application;

Fig. 6 is the partial enlarged structural schematic diagram of the double-pass connection part in the application;

Fig. 7 is the structural representation of the catheter sheath in the application;

8 is a schematic structural diagram of a dilator in the application;

FIG. 9 is a schematic structural diagram of the combination of the catheter sheath and the dilator in the application.

Reference number:

name Numbering name Numbering Hepatobiliary puncture kit 1 straight section 1131 Puncture needle assembly 11 arc part 1132 external puncture needle 111 catheter sheath 12 Needle seat 1111 Two-way connection 121 Second threaded connection 11111 sheath 122 Connecting pipe 1112 side tube 123 Needle 1113 catheter lumen 124 needle 1114 Anti-reverse valve 125 Active valve 1115 LED lights 126 Laser Locator 1116 dilator 13 Removable contact pin 112 dilation tube 131 Pin base 1121 expansion base 132 first threaded connection 11211 Clip 133 core tube 1122 dilation cavity 134 guide wire 113

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions of the present utility model will be described in further detail below in conjunction with specific embodiments, but do not constitute any limitation to the present utility model. The limited revisions made by anyone within the scope of the claims of the present utility model are still within the scope of the claims of the present invention.

In order to solve the above problems, the present utility model provides a hepatobiliary puncture kit 1, comprising:

puncture needle assembly and catheter sheath 12;

The catheter sheath 12 includes a double-pass connecting portion 121, a sheath tube 122 and a side tube 123;

The sheath tube 122 and the side tube 123 are communicated through the double-pass connecting portion 121;

The catheter sheath 12 is provided with a catheter lumen 124 for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the catheter sheath 12 through the catheter lumen 124 .

As mentioned above, the material of the catheter sheath 12 may include, but is not limited to, polytetrafluoroethylene, and the outer coating is silicone oil, dimethylacrylamide-glycidyl acrylate copolymer. The catheter sheath 12 is a single-use product that can be sterilized by ethylene oxide.

As mentioned above, the puncture needle assembly is a device for puncturing, and may include a puncture needle and a guide wire 113 for puncturing and positioning the hepatic bile duct according to the fixed area.

In the process of puncturing, after puncturing through the puncture needle assembly, place the guide wire 113 for positioning, withdraw the puncture needle, and then insert the catheter sheath 12 into the guide wire 113, that is, the guide wire 113 is placed in the The interior of the catheter sheath 12 is then angiography, and the contrast agent can be injected through the side tube 123, so that the angiography can be directly performed through the side tube 123 of the catheter sheath 12 on the basis of precise positioning without removing the guide wire 113.

In the present invention, the sheath tube 122 and the side tube 123 are connected through the double-pass connecting portion 121 by providing a double-pass on the catheter sheath 12, so that the guide wire 113 can be retained without taking out the premise of the puncture operation. , injecting the contrast agent through the side tube 123 to realize the side tube 123 angiography, which avoids the failure of the puncture caused by the prolapse of the bile duct caused by the removal of the guide wire 113 during the puncture operation. convenient.

Preferably, the catheter sheath 12 further includes an anti-reverse valve 125 disposed on the double-way connecting portion 121;

The anti-reverse valve 125 is disposed at one end of the double-way connecting portion 121 corresponding to the sheath tube 122 .

Preferably, the hepatobiliary puncture kit 1 further includes a dilator 13;

The dilator 13 includes an expansion tube 131 , an expansion base 132 connected to the expansion tube 131 , and a clip 133 provided on the expansion base 132 ;

The outer diameter of the dilator 13 is smaller than the inner diameter of the sheath tube 122;

The dilator 13 is detachably connected to the catheter sheath 12 through the catheter lumen 124;

The dilator 13 is provided with a dilation cavity 134 for the puncture needle assembly to penetrate;

When the dilator 13 is inserted into the catheter sheath 12 , the latching member 133 is latched with the anti-reverse valve 125 .

As mentioned above, the outer diameter of the dilator 13 and the outer diameter of the puncture needle assembly are both smaller than the inner diameter of the catheter sheath 12, so both the dilator 13 and the puncture needle assembly can penetrate into the catheter cavity 124 of the catheter sheath 12; the puncture needle assembly can penetrate into the expansion cavity 134 of the dilator 13 .

As mentioned above, the dilator 13 plays the role of supporting and increasing the strength, and the skin of patients with jaundice tends to be hard. Therefore, in the present invention, a dilator 13 with an outer diameter smaller than the inner diameter of the sheath tube 122 is provided, which can be used for the dilator 13 It is combined with the sheath tube 122, and the puncture needle assembly is inserted into the expansion cavity 134 of the combined dilator 13, that is, a puncture needle assembly, dilator 13, and catheter are formed from the inside to the outside. The combination of the sheath 12, as a whole, is introduced into the target bile duct along the guide wire 113.

As mentioned above, the material of the dilator 13 may include, but is not limited to, polypropylene, and the coating is silicone oil, dimethylacrylamide-glycidyl acrylate copolymer. The catheter sheath 12 is a single-use product, sterilized by ethylene oxide.

Preferably, the catheter sheath 12 is a 5Fr catheter sheath 12 .

Preferably, the puncture needle assembly 11 further includes:

External puncture needle 111 and removable needle core 112;

The external puncture needle 111 is provided with a puncture cavity for the removable needle core 112 to penetrate, and the removable needle core 112 is detachably connected to the external puncture needle 111 through the puncture cavity;

The removable needle core 112 can move along the length direction of the outer puncture needle 111 in the puncture cavity.

As mentioned above, the external puncture needle 111 is a hollow lumen, which contains a puncture cavity for the introduction of the removable needle core 112. After the removable needle core 112 is inserted into the puncture cavity, it is completely filled and occupies the hollow space of the external puncture needle 111. The puncture cavity in the structure.

As mentioned above, when performing puncture, first of all, it is necessary to combine the external puncture needle 111 with the removable needle core 112, that is, to insert the removable needle core 112 into the external puncture needle 111, that is, through the removable needle core 111 112 Block the puncture cavity of the external puncture needle 111, and then use the hepatobiliary puncture kit 1 to puncture the target operation area. After reaching the target position, the removable needle core 112 can be pulled out, and the external puncture needle 111 can be retained, and then Other devices are inserted into the external puncture needle 111 for drainage or angiography.

As mentioned above, the material of the puncture needle may include but not limited to stainless steel and polycarbonate, all of which are disposable products.

As mentioned above, the ethylene oxide sterilization process can be carried out before use.

In addition, the length of the external puncture needle 111 may be 20 cm. At present, the length of the existing one-step puncture needle is only 15cm. When the acute obstruction of obese patients needs to penetrate the first-level branch of the bile duct or even the main trunk, the length may be insufficient; The method of puncture needle has more advantages, improves the success rate of the operation, and provides convenience for the operation.

In the present invention, a removable needle core 112 is arranged in the puncture cavity of the external puncture needle 111. During the puncture operation, after the combined hepatobiliary puncture kit 1 is inserted into the operation area such as the biliary tract, the removable needle can be inserted The core 112 is disassembled and pulled out, and then other devices such as the guide wire 113 are inserted for positioning and injection of contrast medium, so as to realize that during the puncture process, after puncturing the skin, the puncture cavity of the external puncture needle 111 is set in the puncture cavity. The detachable needle core 112 in the cavity is filled and occupied, that is, the external puncture needle 111 does not have the hollow tubular structure in the prior art during the puncture process, so during the puncture, neither strip cutting of the liver tissue occurs. In this case, the external puncture needle 111 will not be blocked due to the cut tissue entering the puncture cavity, avoiding the dynamic-portal vein caused by the cutting damage to the liver caused by the puncture target when there are arteries and portal veins in the puncture channel. Leakage, arterial-biliary leakage, portal vein-biliary leakage, and avoid the blockage of the puncture needle to ensure the smooth progress of the operation. In a word, the hepatobiliary puncture kit 1 provided by the present invention, on the one hand, avoids the cutting damage to the liver caused by puncture, and on the other hand, avoids the blockage inside the puncture needle, which brings convenience to the puncture work of the doctor and puts an end to the patient The safety hazard caused by the injury caused by puncture.

Preferably, the hepatobiliary puncture kit 1 further includes a guide wire 113;

The outer diameter of the guide wire 113 is smaller than the inner diameter of the puncture cavity of the external puncture needle 111 , so that after the removable needle core 112 is drawn out, the guide wire 113 replaces the removable needle core 112 and pierces through it. into the puncture cavity.

Preferably, the outer diameter of the guide wire 113 is 0.05-0.1 cm;

The length of the guide wire 113 is 50 cm.

The outer diameter of the guide wire 113 is 0.05-0.1 cm, preferably, the outer diameter may be 0.0889 cm, that is, 0.035 inches.

Preferably, the guide wire 113 includes a straight portion 1131 and an arc portion 1132 connected with the straight portion 1131 .

As mentioned above, the material of the guide wire 113 may include, but is not limited to, urethane resin and nickel-titanium alloy.

As mentioned above, the guide wire 113 is a one-time-use product, and can be sterilized by ethylene oxide before use.

As mentioned above, the outer diameter of the guide wire 113 is 0.035 inches, which can be smoothly inserted into the puncture cavity of the external puncture needle 111 for positioning after the removable needle core 112 is withdrawn.

Preferably, the external puncture needle 111 includes a needle seat 1111, a connecting tube 1112 and a needle tube 1113 connected in sequence;

A needle 1114 is provided at one end of the needle tube 1113 away from the connecting tube 1112 .

As mentioned above, the external puncture needle 111 includes a needle seat 1111, a connecting tube 1112, a needle tube 1113 and a needle 1114, and the needle 1114 can be a needle 1114 with an oblique section of a traditional injection needle 1114, or an oval needle 1114, That is to say, it is tapered from the rear end to the front section, the head is the thinnest end, and the periphery of the rear part can be a smooth oval shape, so that the external puncture needle 111 can further reduce the impact on the tissue after piercing the skin. Cuts or other forms of injury that improve the success of surgery.

Preferably, the external puncture needle 111 further includes a movable valve 1115 arranged on the needle tube 1113 and movable along the length direction of the needle tube 1113;

The movable valve 1115 is used to mark the puncture length of the needle tube 1113 .

As described above, the movable valve 1115 is used to measure the depth distance of the needle 1114 after the external puncture needle 111 has penetrated the skin. In addition, the movable valve 1115 is a movable movable valve 1115, and the position of the movable valve 1115 can be set according to the specific needs of the doctor or the actual skin condition of the patient.

As mentioned above, the puncture length is when the target site is punctured on the patient, for example, after the needle 1114 is inserted into the bile duct, the movable valve 1115 is slid to the end of the needle tube 1113 that contacts the skin, that is, the position outside the body and When the needle tube 1113 is in contact with the skin, after the needle tube 1113 is pulled out, the length of the needle tube 1113 entering the body can be measured through the length of the movable valve 1115 to the needle tip 1114 of the needle tube 1113 that penetrates the skin.

Preferably, the connecting tube 1112 is provided with a laser locator 1116 for emitting a laser in the direction of the needle 1114 for positioning.

As mentioned above, the laser locator 1116 is an aiming device that emits laser light toward the skin end of the patient for marking and positioning. In the process of puncturing, after marking the patient's skin with a marker pen, the puncture needle is punctured to the target area. Since the puncture process is manual puncture, the correctness of the puncture direction cannot be guaranteed. During the puncture process, the laser locator 1116 can be turned on, and the laser beam emitted from the connecting tube 1112 can be aimed at the target area of the patient's skin, so that the direction of the laser can be used as the guide during the puncture process to ensure the correctness of the puncture direction. The doctor's puncture work provides convenience.

In addition, the laser locator 1116 may further include a power supply device, the power supply device may be a lithium battery or a button battery, and the connection method may be provided in the needle seat 1111 or electrically connected through an external wire.

Preferably, a scale is provided on the outer side of the needle tube 1113 for measuring the punctured distance of the needle tube 1113 .

As mentioned above, the outer side of the needle tube 1113 is provided with a readable, and the measurement accuracy can be 0.1 mm, which is used to measure the depth distance of the needle 1114 after the external puncture needle 111 pierces the skin.

Preferably, the needle core includes a needle core base 1121 and a core tube 1122 connected to the needle core base 1121;

The needle base 11211121 is provided with a first threaded connector 11211 connected to the needle seat 1111; the needle seat is provided with a second threaded connector 11111 threaded with the first threaded connector 11211.

As mentioned above, the needle seat 1111 and the needle core base 11211121 can be threadedly connected, which is realized by the first threaded connection piece 11211 of the needle core base 11211121 and the second screw connection piece 11111 of the needle base 1111, and the needle base 1111 and the needle core base 11211121 pass through After threaded connection, a tight combination can be achieved, and the overall puncture can be performed.

Preferably, the external puncture needle 111 is an 18G external puncture needle 111 .

Above, it should be noted that G is the unit of the outer diameter of the external puncture needle. The conversion of the unit is as follows: (36-corresponding G number)/20, which is about the millimeter of the imported puncture needle (this formula is only applicable to from 20G to 30G). For example, the calculation method of 22G is: (36-22)/20=0.7 (mm), which is equivalent to the specification of No. 7 puncture needle in my country. However, the upward G difference from 19G is about 0.2 mm, and the calculation formula is (24-corresponding G number)/5. For example, the calculation method of 18G puncture needle is: (24-18)/5=1.2 (mm), which is equivalent to the specification of my country's 12-gauge puncture needle.

In order to facilitate the understanding of the present utility model, the technical solutions of the present utility model are further described below with reference to the embodiments. The applicant declares that the present utility model illustrates the detailed technological equipment and technological process of the present utility model through the above-mentioned embodiments, but the present utility model is not limited to the above-mentioned detailed technological equipment and technological process, that is, it does not mean that the present utility model must rely on the above-mentioned detailed technological equipment and technological process. Detailed process equipment and process flow can be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention. within.

Example 1:

1-2, this embodiment provides a puncture needle assembly 11, including:

External puncture needle 111 and removable needle core 112;

The outer puncture needle 111 is provided with a cavity along its length direction for the detachable needle core 112 to penetrate;

The removable needle core 112 can move in the cavity along the length direction of the external puncture needle 111 .

Preferably, the puncture needle assembly 11 further includes a guide wire 113;

The outer diameter of the guide wire 113 is smaller than the inner diameter of the cavity of the external puncture needle 111 , so that after the removable needle core 112 is drawn out, the guide wire 113 replaces the removable needle core 112 and passes through it. into the cavity.

Preferably, the outer diameter of the guide wire 113 is 0.035 inches;

The length of the guide wire 113 is 50 cm.

Preferably, the guide wire 113 includes a straight portion 1131 and an arc portion 1132 connected with the straight portion 1131 .

In this embodiment, the removable needle core 112 is provided in the cavity of the external puncture needle 111. During the puncture operation, after the combined puncture needle assembly 11 is inserted into the surgical area such as the biliary tract, the removable needle core 112 can be removed. It is disassembled and pulled out, and then other devices such as the guide wire 113 are inserted for positioning, injection of contrast agent, etc., so that in the process of puncturing, the cavity of the external puncture needle 111 is set in the cavity after puncturing the skin. The detachable needle core 112 is filled and occupied, that is, the external puncture needle 111 does not have the hollow tubular structure in the prior art during the puncture process, so during the puncture, there will be no strip cutting of the liver tissue, and The external puncture needle 111 will not be blocked due to the incised tissue entering the cavity, and when the puncture channel has arteries and portal veins, the active-portal leakage, arterial- Bile duct leakage, portal vein - bile duct leakage, and eliminate the blockage of the puncture needle to ensure the smooth operation of the operation. In a word, the puncture needle assembly 11 provided by the present invention, on the one hand, avoids the cutting damage to the liver caused by the puncture, and on the other hand avoids the blockage inside the puncture needle, which brings convenience to the puncture work of the doctor, and prevents the patient from The safety hazard caused by the injury caused by puncture.

Example 2:

1-2, the present embodiment provides a puncture needle assembly 11, based on the above-mentioned embodiment,

Preferably, the external puncture needle 111 includes a needle seat 1111, a connecting tube 1112 and a needle tube 1113 connected in sequence;

A needle 1114 is provided at one end of the needle tube 1113 away from the connecting tube 1112 .

Preferably, the external puncture needle 111 further includes a movable valve 1115 arranged on the needle tube 1113 and movable along the length direction of the needle tube 1113;

The movable valve 1115 is used to mark the length of the needle tube 1113 .

As mentioned above, the external puncture needle 111 includes a needle seat 1111, a connecting tube 1112, a needle tube 1113 and a needle head 1114. In addition, the length direction of the needle tube 1113 is provided with a movable valve 1115 that can reciprocate along the outside of the needle tube 1113, which can be adjusted manually. To achieve the measurement of the distance (the distance from the needle 1114 to the movable valve 1115 ) after the puncture needle penetrates the skin during the operation. Thereby, the surgeon can grasp the operation situation, the distance and depth of the puncture at any time, thereby providing convenience for the operation.

Example 3:

3-4, this embodiment provides a puncture needle assembly 11, based on the above-mentioned Embodiment 1,

Preferably, the external puncture needle 111 includes a needle seat 1111, a connecting tube 1112 and a needle tube 1113 connected in sequence;

A needle 1114 is provided at one end of the needle tube 1113 away from the connecting tube 1112 .

Preferably, the connecting tube 1112 is provided with a laser locator 1116 for emitting a laser in the direction of the needle 1114 for positioning.

Preferably, a scale is provided on the outer side of the needle tube 1113 for measuring the punctured distance of the needle tube 1113 .

Preferably, the removable needle core 112 includes a needle core base 1121 and a core tube 1122 connected to the needle core base 1121;

The needle base 1121 is provided with a threaded connector for connecting with the needle seat 1111 .

The needle core base 1121 is provided with a first threaded connector 11211 connected with the needle seat 1111 ; the needle seat 1111 is provided with a second threaded connector 11111 threaded with the first threaded connector 11211 .

As mentioned above, the first threaded connector 11211 and the second threaded connector 11111 can be threadedly matched to realize the fixed connection between the needle core base 1121 and the needle seat 1111 .

Preferably, the external puncture needle 111 is an 18G external puncture needle 111 .

As mentioned above, the laser locator 1116 is an aiming device that emits laser light toward the skin end of the patient for marking and positioning. In the process of puncturing, after marking the patient's skin with a marker pen, the puncture needle is punctured to the target area. Since the puncture process is manual puncture, the correctness of the puncture direction cannot be guaranteed. During the puncture process, the laser locator 1116 can be turned on, and the laser beam emitted from the connecting tube 1112 can be aimed at the target area of the patient's skin, so that the direction of the laser can be used as the guide during the puncture process to ensure the correctness of the puncture direction. The doctor's puncture work provides convenience.

In addition, the outer side of the needle tube 1113 is provided with a readable reading, and the measurement accuracy can be 0.1 mm, which is used to measure the depth distance of the needle 1114 after the external puncture needle 111 pierces the skin.

As mentioned above, the needle seat 1111 and the needle core base 1121 can be threadedly connected, which is realized by the threaded connection of the needle core base 1121. After the needle seat 1111 and the needle core base 1121 are connected by threads, a tight combination is realized, and the overall puncture can be performed. . In addition, the connection between the needle seat 1111 and the needle core base 1121 may also be other connection methods, such as snap connection, which is realized by a snap connection fitting.

Example 4:

Referring to FIGS. 5-6 , this embodiment provides a hepatobiliary puncture kit 1, which is based on an implementation of the above embodiments 1-3, and includes: a puncture needle assembly 11 and a catheter sheath 12;

The catheter sheath 12 includes a double-pass connecting portion 121, a sheath tube 122 and a side tube 123;

The sheath tube 122 and the side tube 123 are communicated through the double-pass connecting portion 121;

The catheter sheath 12 is provided with a catheter lumen 124 for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the catheter sheath 12 through the catheter lumen 124 .

As mentioned above, the double-way connecting portion 121 is a component that communicates the side tube 123 and the sheath tube 122, and is used for the injection of the contrast agent directly through the side tube 123 without removing the guide wire 113 during puncture, avoiding the need for A series of problems such as inaccurate positioning caused by the removal of the guide wire 113 .

In addition, the two-way connecting portion 121 can be provided with valves that control the two-way respectively, so as to prevent the overflow of body fluids, blood and other liquids from the side tube 123 during the puncture process, resulting in blockage and other factors that affect the operation or the health of the patient.

In addition, a plurality of side tubes 123 can be provided, and the corresponding double-pass connecting portion 121 can be a multi-pass connecting portion with valves respectively, so that different side tubes 123 can be connected to the sheath tube 122 respectively, so as to realize the injection of contrast agent Or perform other surgical work without affecting the normal surgical process.

In addition, the double-pass connecting part 121 can be provided with an LED light 126 facing the patient's skin, which is used for illumination during the operation, which can improve the brightness of the puncture area during the operation to a certain extent, so as to illuminate and indicate positioning. effect. Among them, a plurality of LED lights 126 can be provided, for example, they are respectively provided on the upper and lower ends of the double-pass connecting portion 121 facing the patient's skin, so as to improve the lighting effect. The visual impact of the patient's affected area reduces the disturbance to the doctor during the treatment.

As mentioned above, the material of the catheter sheath 12 may include, but is not limited to, polytetrafluoroethylene, and the outer coating is silicone oil, dimethylacrylamide-glycidyl acrylate copolymer. The catheter sheath 12 is a single-use product that can be sterilized by ethylene oxide.

As mentioned above, the puncture needle assembly is a device for puncturing, and may include a puncture needle and a guide wire 113 for puncturing and positioning the hepatobiliary duct according to the fixed area.

In the process of puncturing, after puncturing through the puncture needle assembly, the guide wire 11313 can be placed for positioning, and the puncture needle is withdrawn. The interior of the catheter sheath 12 is then angiography, and the contrast agent can be injected through the side tube 123, so that the angiography can be directly performed through the side tube 123 of the catheter sheath 12 on the basis of precise positioning without removing the guide wire 113.

In the present invention, the sheath tube 122 and the side tube 123 are connected through the double-pass connecting portion 121 by providing a double-pass on the catheter sheath 12, so that the guide wire 113 can be retained without taking out the premise of the puncture operation. The contrast agent is injected through the side tube 123 to realize the side tube 123 angiography, which avoids the failure of the puncture caused by the prolapse of the bile duct caused by the removal of the guide wire 113 during the puncture operation. convenient.

Example 5:

7-9, this embodiment provides a hepatobiliary puncture kit 1, based on the above-mentioned Embodiment 4,

Preferably, the catheter sheath 12 further includes an anti-reverse valve 125 disposed on the double-way connecting portion 121;

The anti-reverse valve 125 is disposed at one end of the double-way connecting portion 121 corresponding to the sheath tube 122 .

Preferably, the hepatobiliary puncture kit 1 further includes a dilator 13;

The dilator 13 includes an expansion tube 131, an expansion base 132 connected to the expansion tube 131, and a clip 133 provided on the expansion base 132;

The outer diameter of the dilator 13 is smaller than the inner diameter of the sheath 122;

The dilator 13 is detachably connected to the catheter sheath 12 through the catheter lumen 124;

When the dilator 13 is inserted into the catheter sheath 12 , the latching member 133 is latched with the anti-reverse valve 125 .

Preferably, the catheter sheath 12 is a 5Fr catheter sheath 12 .

As mentioned above, it should be noted that Fr is the unit of the catheter, which was originally a unit for measuring the circumference. The number after Fr represents the circumference, such as Fr16, which means the circumference is 16Fr. Because 3F=1mm circumference, F≈1/3 circumference≈0.33mm. Circumferential diameter=π(3.14)×diameter, diameter≈1/3 Circumferential diameter=F×circumferential diameter/1mm. According to this, the diameter of the catheter of Fr16 can be calculated=16×0.33≈5.3mm. In this embodiment, 5Fr means the circumference is 5Fr, and the diameter of the conduit is about 1.65mm.

As mentioned above, the expansion base is provided with a clip 133, which is used for the clip 133 to be clipped with the anti-reverse valve 125. In addition, it can also be fixedly connected to the anti-reverse valve 125 in other ways, for example, a thread can be used. connect.

The above-mentioned clip 133 may include a manual opening knob. After the clip 133 is clipped with the anti-reverse valve 125, the opening knob is pressed to separate the clip 133 from the anti-reverse valve 125. The knob can realize the separation of the clamping part 133 and the anti-reverse valve 125 with one hand, which improves the efficiency of disassembly and assembly and provides convenience for the operation work.

As mentioned above, the outer diameter of the dilator 13 and the outer diameter of the puncture needle assembly are both smaller than the inner diameter of the catheter sheath 12, so both the dilator 13 and the puncture needle assembly can penetrate into the catheter cavity 124 of the catheter sheath 12; the puncture needle assembly can penetrate into the expansion cavity 134 of the dilator 13 .

As mentioned above, the dilator 13 plays the role of supporting and increasing the strength, and the skin of patients with jaundice is often hard. Therefore, in the present invention, a dilator 13 with an outer diameter smaller than the inner diameter of the sheath tube 122 is provided, which can be used for the dilator 13 It is combined with the sheath tube 122, and the puncture needle assembly is inserted into the expansion cavity 134 of the combined dilator 13, that is, a puncture needle assembly, dilator 13, and catheter are formed from the inside to the outside. The combination of the sheath 12, as a whole, is introduced into the target bile duct along the guide wire 113.

As mentioned above, the material of the dilator 13 may include, but is not limited to, polypropylene, and the coating is silicone oil, dimethylacrylamide-glycidyl acrylate copolymer. The catheter sheath 12 is a single-use product, sterilized by ethylene oxide.

In order to better illustrate the puncture needle assembly 11 provided by the present utility model, the present utility model also provides a puncture operation method of the puncture needle assembly 11, including:

1. After selecting the puncture site, routinely disinfect and drape anesthesia;

2. Perform percutaneous liver puncture, use the 18G puncture needle assembly 11 to penetrate the target bile duct, withdraw the needle core, and perform angiography while withdrawing the puncture needle. The wire 113 reaches the target position and exits the puncture needle;

3. The 5Fr sheath 122 and the dilator 13 are introduced into the target bile duct as a whole along the guide wire 113; the skin of patients with jaundice is often hard, and the puncture needle, the dilator 13 and the sheath 122 can be introduced as a whole along the guide wire 113 target bile duct.

4. Push out the dilator 13, keep the guide wire 113 and the sheath tube 122, and confirm the position of the sheath tube 122 and the dilation of the intrahepatic bile duct through the side tube 123 angiography under DSA;

5. Catheters or other therapeutic devices with an outer diameter of ≤5Fr can be directly introduced through the sheath tube 122;

For catheters or other therapeutic instruments with an outer diameter greater than 5Fr, the introduction sheath 122 must be taken out, the guide wire 11313 must be retained, and a larger diameter sheath 122 or other therapeutic instruments must be introduced along the guide wire 113;

6. After the operation is completed, the guide wire 113 and the introduction sheath 122 are taken out.

Claims (10)

1. a hepatobiliary puncture kit, is characterized in that, comprises: Needle assemblies and introducer sheaths; The catheter sheath includes a double-pass connecting part, a sheath tube and a side tube; The sheath tube and the side tube are communicated through the double-pass connecting portion; The catheter sheath is provided with a catheter lumen for the puncture needle assembly to penetrate, and the puncture needle assembly is detachably connected to the catheter sheath through the catheter lumen. 2. The hepatobiliary puncture kit according to claim 1, wherein the catheter sheath further comprises an anti-reverse valve arranged at the double-way connecting portion; The anti-reverse valve is arranged at one end of the double-way connecting portion corresponding to the sheath tube. 3. The hepatobiliary puncture kit according to claim 2, wherein the hepatobiliary puncture kit further comprises a dilator; The dilator includes an expansion tube, an expansion base connected with the expansion tube, and a clip on the expansion base; The outer diameter of the dilator is smaller than the inner diameter of the sheath; The dilator is detachably connected to the catheter sheath through the catheter lumen; The dilator is provided with a dilation cavity for the puncture needle assembly to penetrate; When the dilator is inserted into the catheter sheath, the latching member is latched with the anti-reverse valve. 4. The hepatobiliary puncture kit according to claim 1, wherein the catheter sheath is a 5Fr catheter sheath. 5. The hepatobiliary puncture kit according to claim 1, wherein the puncture needle assembly further comprises an external puncture needle and a removable needle core; The external puncture needle is provided with a puncture cavity for the removable needle core to penetrate; The removable needle core can move in the puncture cavity along the length direction of the outer puncture needle. 6. The hepatobiliary puncture kit of claim 5, wherein the hepatobiliary puncture kit further comprises a guide wire; The outer diameter of the guide wire is smaller than the inner diameter of the puncture cavity of the external puncture needle, so that after the removable needle core is drawn out, the guide wire replaces the removable needle core and penetrates into the puncture cavity . 7. The hepatobiliary puncture kit according to claim 6, wherein the outer diameter of the guide wire is 0.05-0.1 cm; The length of the guide wire is 50 cm. 8. The hepatobiliary puncture kit according to claim 5, wherein the external puncture needle comprises a needle seat, a connecting tube and a needle tube which are connected in sequence; A needle is provided at one end of the needle tube facing away from the connecting tube. 9. The hepatobiliary puncture kit according to claim 8, wherein the external puncture needle further comprises a movable valve arranged on the needle tube and movable along the length direction of the needle tube; The movable valve is used to mark the puncture length of the needle tube. 10 . The hepatobiliary puncture kit according to claim 8 , wherein a scale is provided on the outside of the needle tube for measuring the distance of the needle tube puncture. 11 .