CN106618674A - Straight liver cancer portal vein cancer thrombus fetching tongs - Google Patents

Abstract

The invention relates to a straight liver cancer portal vein tumor thrombus retrieval forceps. The middle sections of two forceps arms are riveted and connected to each other by a rivet shaft. The pliers head has a flat arc-shaped concave surface structure with a flat front and a wide rear gradually. The inner wall of the pliers head is a wavy arc-shaped conical surface structure. When one forceps arm drives the two forceps heads to close, the front-flat and rear-width gradually changing flat arc-shaped concave structures at the head ends of the two forceps heads fit together to form a sealed cavity for removing thrombus. The clamp head of the present invention with a gradually changing flat arc-shaped concave surface can effectively clamp portal vein tumor thrombi. When the clamp head part extends into the blood vessel, the opening of the clamp head can be maximized, so that the single clamping amount is large, and the clamp head is closed. Finally, the tapered surface of the side wall of the forceps head is tightly engaged, the tumor thrombus is not easy to fall off after the forceps head is closed, and the wound surface will not be polluted, which ensures the radicalness of portal vein tumor thrombus removal, is convenient to operate, shortens the operation time, and improves the efficiency.

Description

Thrombectomy forceps for portal vein tumor thrombus in straight liver cancer

technical field

The invention relates to a clamp for taking out tumor thrombus or thrombus in portal vein in liver surgery, in particular, a clamp for removing tumor thrombus in portal vein in surgery for portal vein tumor thrombus of liver cancer.

Background technique

When the liver tumor develops to the middle and late stage, tumor emboli often invade the main blood vessels of the liver, such as the portal vein and hepatic vein. Whether the tumor emboli in the blood vessels can be removed will directly affect the patient's tumor recurrence and survival time. At present, there is no special thrombectomy forceps for vascular cancer thrombus clinically, and the thrombectomy instruments used are mostly replaced by existing instruments such as biliary tract lithotripsy forceps or tweezers. This type of forceps has many disadvantages in the operation process: the head of the forceps is mostly arc-shaped, and when it is inserted into the blood vessel to remove the thrombus after opening, the opening size of the arc head is small, resulting in a tumor thrombus. The grasping amount is small, and it may also push the tumor thrombus into the blood vessel, making it difficult to remove the thrombus. Moreover, the texture of the portal vein tumor thrombus is relatively soft, and most of the tumor thrombi are more or less adhered to the wall of the portal vein (see Figure 1), there are even small blood vessels connected, so when removing the thrombus, only use the current clinically available forceps of different shapes to hold the tumor thrombus. Too much clamping force will crush the tumor thrombus and cause tumor spread; too much force It is too small to effectively remove the tumor thrombus, and during the process of removing the tumor thrombus, due to a series of problems such as the operation force, the tumor thrombus may drip slightly, which can easily cause the final tumor metastasis and affect the surgical effect.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a straight liver cancer portal vein tumor thrombus retrieval forceps with outstanding practical functions, reasonable structural design, and convenient and effective clamping of portal vein tumor thrombi. .

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a straight liver cancer portal vein tumor thrombus retrieval forceps, comprising forceps head, forceps arm, rivet shaft, limit sawtooth, handle, the middle section of the two forceps arms is rivet shaft Mutual riveted connection, the pliers head is set at the front end of the pliers arm, and the pliers head and the pliers arm are connected in a straight line. The pliers head has a flat arc concave structure with a flat front and a gradually changing width at the back, and the inner wall of the pliers head is a wavy arc-shaped cone. Surface structure, when clamping the tumor thrombus, the wavy arc-shaped conical surface structure on the inner wall of the two forceps heads is tightly meshed, and when the two forceps arms drive the two forceps heads to close, the front flat and rear width of the two forceps heads are flat arcs with gradual changes The two-shaped concave structure fits together to form a sealed cavity for thrombectomy.

The material of the thrombectomy forceps is medical stainless steel or medical plastic meeting biocompatibility requirements.

After the two pincers are engaged, the height of the head end is between 2-6mm, the length is 10-30mm, the height c of the tail end is between 6-12mm, and the width is between 6-12mm.

Compared with the prior art, the present invention has the following beneficial effects: the practical function is outstanding, and the gradually changing flat arc concave forceps can effectively clamp the portal vein cancer thrombus, and the forceps open when the forceps part is inserted into the blood vessel Maximize the amount of single clamping, and the tumor embolus is not easy to fall off after the forceps head is closed. The invention is easy to process and manufacture, low in cost, more suitable for the needs of clinical treatment of liver surgery, convenient to operate, strong in practicability, and has good market prospect.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the structure of the straight liver cancer portal vein tumor thrombus removal forceps of the present invention;

Fig. 2 is a front view of the clamp head structure of the present invention;

Fig. 3 is a top view of the pincer head structure of the present invention;

Fig. 4 is a sectional view when the tapered surface of the side wall of the pliers head of the present invention is engaged;

Fig. 5 is a schematic diagram of clamping a tumor embolus during an operation with the forceps of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention will be further described

As shown in FIG. 1 , the straight portal vein tumor thrombus retrieval forceps for liver cancer of the present invention include a forceps head 1 , forceps arms 2 , rivet shaft 3 , limiting serrations 4 and a handle 5 . The front section of the pliers arm 2 connected to the pliers head 1 is linear, and the middle sections of the two pliers arms 2 are riveted to each other with a rivet shaft 3; The arc-shaped concave surfaces are joined together to form a sealed embolectomy cavity 6 . The inner side wall of the forceps head 1 has a wavy arc-shaped 7-shaped conical surface 8 structure. When grasping a tumor thrombus, the two pliers 1 inner wall-shaped wavy-arc-shaped 7-shaped conical surfaces closely engage.

As shown in Figures 2 and 3, after the two pliers are engaged, the height a of the head end is between 2-6mm, the length b is between 10-30mm, the height c of the tail end is between 6-12mm, and the width d is between 6-12mm between.

As shown in Fig. 4, when the upper and lower forceps heads are engaged, the two tapered surfaces 8 are tightly fitted, which enhances the sealing performance after the forceps heads are engaged and prevents the tumor thrombus from falling off during the operation.

As shown in Figure 5, during the operation, according to the size of the venous vessel, use a suitable thrombectomy forceps so that the curved surface of the flat-arc forceps head is close to the vessel wall 9 and extends into the blood vessel. Small, there will be no phenomenon of squeezing the tumor thrombus in the blood vessel. At this time, the opening size h of the forceps head is maximized, and the largest amount of thrombus can be smoothly clamped at a time.

Example:

When the present invention is used in surgery, taking the right hepatic tumor portal vein tumor thrombus as an example, after resecting the right liver tumor, open the right portal vein. 12mm, 12mm head height cancer thrombus forceps, the portal vein thrombectomy forceps first open the forceps head 1 to a certain angle through the handle 5 and the rivet shaft 3 to adapt to the size of the blood vessel, then extend the opened forceps head into the blood vessel, and then After the forceps head 1 is closed, the tumor thrombus at the vascular opening is drawn out, and the larger tumor thrombus at the venous vessel opening is removed. After the tumor thrombus at the vascular port is removed, according to the characteristics of the hepatic portal vein branch from thick to thin, the tumor thrombus forceps with 4mm head height, 20mm length, 8mm tail height, and 8mm width are used again. Take out the tumor thrombus in the middle of the venous vessel, and finally use the tumor thrombus forceps with the height of the head end of the forceps to be 2 mm, the length of the forceps head to be 10 mm, the height of the tail end of the forceps head to be 6 mm, and the height of the forceps head to be 6 mm to remove the tumor thrombus at the thinnest part of the portal vein.

Claims (3)

1. a kind of straight type liver cancer and portal vein cancer takes bolt pincers, including binding clip（1）, tong arm（2）, rivet rotating shaft（3）, spacing sawtooth （4）, handle（5）, two tong arms（2）Stage casing with rivet rotating shaft（3）Riveted connection mutually, it is characterised in that：The binding clip（1） It is arranged on tong arm（2）Front end, and binding clip（1）With tong arm（2）Linearly connection, binding clip（1）Put down with front flat rear width gradual change type Arc-shaped concave structure, binding clip（1）Madial wall is wave camber（7）The conical surface（8）Structure, when cancer embolus is gripped, two binding clips（1）It is interior Side wall wave camber（7）Cone structure is tightly engaged, two tong arms（2）Drive two binding clips（1）During closure, two binding clips（1） The flat arc-shaped concave structure pairing of front flat rear width gradual change type of head end, form sealing takes bolt chamber（6）.

2. straight type liver cancer and portal vein cancer according to claim 1 takes bolt pincers, it is characterised in that：The material for taking bolt pincers To meet the medical stainless steel or medical plastic of biocompatibility requirement.

3. straight type liver cancer and portal vein cancer according to claim 1 takes bolt pincers, it is characterised in that：Described two binding clips（1） After engagement head end height (a) between 2-6mm, length (b) in 10-30mm, tail end height c between 6-12mm, width (d) Between 6-12mm.