CN209574811U - A kind of stone extraction basket used for medical procedures - Google Patents

Abstract

The utility model provides a kind of stone extraction basket used for medical procedures, including handle portion and mesh basket ontology, the mesh basket ontology includes more than two mesh basket sections, it is the first mesh basket section positioned at distal end, first mesh basket section proximal end is the second mesh basket section, area of the mesh area in the first mesh basket section less than the mesh in the second mesh basket section.The second mesh basket section proximal end is additionally provided with third mesh basket section, and the mesh area in third mesh basket section is less than the mesh area in the second mesh basket section.The stone extraction basket proximal end bore of the utility model is big, and remote stomidium is small, can very easily take out calculus, and prevents calculus from flowing out during withdrawing from stone extraction basket from distal end.

Description

A kind of stone extraction basket used for medical procedures

Technical field

The utility model relates to medical equipment technical field, especially a kind of stone extraction basket used for medical procedures.

Background technique

Endoscopic retrograde cholangiopancreatography (Endoscopic retrograde cholangiopancreatography, ERCP) it is that duodenofiberscope is inserted to descendant duodenum, duodenofiberscope (lower abbreviation nipple) is found, by biopsy Insertion plastic catheter is to nipple opening portion in pipeline, and x ray photograph is not only used to after injecting contrast agent with showing pancreatic duct structure Diagnosis of duodenal, bile duct and pancreatic disease, and gallbladder is taken out as minimally invasive means for treating gallbladder ductus pancreaticus Malignant and benign lesions Pipe or pancreatic stones.

Nineteen sixty-eight reports Endoscopic retrograde cholangiopancreatography art, the phases such as Kawai, Classen in 1974 for the first time in the world After reporting Endoscopic Sphincterotomy of Duodenal Papilla Attached art under ERCP (Endoscopic shincterotomy, EST), starts and controlled The property the treated ERCP new era.In the past 10 years, being constantly progressive with endoscopic instruments and intubation technique, ERCP success rate improves year by year, It is increasingly becoming the important means of Diagnosis of Pancreatic and disease of biliary tract.

Stone extraction basket is that stone helper is commonly taken in ERCP accessory, and stone extraction basket, which is divided into, has seal wire guidance mesh basket, without seal wire It guides mesh basket and takes broken integrated stone extraction basket.Broken integrated mesh basket is wherein taken commonly to take rubble net using Micro-Tech as representative Basket and using Boston Scientifi as fast exchange (RX) rubble mesh basket of representative.Due to taking broken integrated mesh basket and fast exchange Mesh basket is more common, and mesh basket is more expensive, so some units and operation doctor may reduce use because of cost issues.But simple throwing It abandons cost issues not consider, most of operation doctor, which still compares, to be ready using broken integrated mesh basket is taken (with seal wire), especially Slightly bigger calculus of bile duct.Can be divided into " hexagon ", " brilliant " and " spiral shape " according to mesh basket shape, i.e., diamond shape, Dormia and spiral shape, wherein Dormia mesh basket is more commonly used.The above mesh basket, respectively there is advantage and disadvantage, need according to the actual situation and Personal use habit carries out flexible choice.

It, can be with since brilliant mesh basket-Dormia mesh basket is the toughness mesh basket structure with " front end expand tail end reduce " Make mesh basket extract calculus to be more easier.If can not take out after entangling because calculus is excessive, unclamping mesh basket can also smoothly press-off, In order to avoid awkward fortuitous event occurs.Regular " hexagon-diamond shape " mesh basket then relatively fewer use, or be only in lithotriptor Mesh basket in apply.Since the gap of " diamond shape " mesh basket is larger, lesser calculus is easy to miss from mesh basket.And spiral shape Mesh basket then had the characteristics of " easily upper set without easily overcoming difficulties ", need to fully understand calculus using spiral shape mesh basket estimate after using behaviour Calculus could be avoided to block as far as possible when making.

After calculus of bile duct ERCP rubble, many broken calculus will be generated, and often calculus of bile duct will be multiple from now on for these broken calculus The major reason of hair, it is therefore desirable to be effectively addressed.Boulder can be pulled out and take bile duct out of by common common mesh basket, and Broken calculus is difficult to be taken out with common mesh basket, the patient obviously expanded especially for bile duct.In addition, stone sacculus is taken to take stone to broken calculus Effect is undesirable, and needs that selects diameter big to take stone sacculus, but due to nipple mouth, portion is smaller, and big sacculus will be unable to take out, If taken out by force, it will bring injury to duodenofiberscope mouth, cause infection of biliary tract.

Engraving realizes intensive, at high cost, the intensity difference in distal end, and the dictyosome silk material section of engraving is not round silk material, is easy to make At injury, this technique is common in intravascular stent, but the density of texture that intravascular stent carves out is big, is not likely to produce injury, this The instrument that artistic carving is suitble to this aperture of mesh basket big uses.

Distal end screening pocket or overlay film: the string bag is different with main body mesh basket material, and assembly technology is at high cost, when taking in outer tube, is Reaching lesser volume avoids size of outer tube excessive, is unfavorable for needing by endoscope using " ultra-thin " string bag, and has certain Intensity, this string bag rely on import, and cost is very high.Overlay film is to need the membrane material that comparison is thick up to some strength, needs to increase in this way Size of outer tube is unfavorable for passing through endoscope.Take in outer tube when due to passing through endoscope, it is larger that the membrane material string bag accounts for volume, full of outer Pipe, so that distal outer tube is harder, not easily passs through curved endoscope, i.e. the excessively curved performance of product is poor.

Stainless steel welded: welding procedure is at high cost, since titanium-nickel wire is not easy to weld, uses stainless steel material, does not have Shape memory, swelling size not can guarantee, and rigidity is excessive, and size of outer tube increases.

Utility model content

Purpose of utility model: technical problem to be solved in the utility model is in view of the deficiencies of the prior art, to provide one Kind stone extraction basket used for medical procedures.

In order to solve the above-mentioned technical problem, the utility model provides a kind of stone extraction basket used for medical procedures, including handle Portion and mesh basket ontology, the mesh basket ontology include more than two mesh basket sections, are the first mesh basket section, the first net positioned at distal end Basket section proximal end is the second mesh basket section, area of the mesh area in the first mesh basket section less than the mesh in the second mesh basket section.

In the utility model, the second mesh basket section proximal end is additionally provided with third mesh basket section, the mesh face in third mesh basket section Product is less than the mesh area in the second mesh basket section.

In the utility model, the first mesh basket section is equipped with one group of aperture, and the second mesh basket section is equipped with one group of macropore, small The area in hole is less than the area of macropore.

In the utility model, length in the first mesh basket section axial direction be the upward length of mesh basket body shaft two/ One.

In the utility model, the first mesh basket section is made of titanium-nickel wire.

In the utility model, the diameter of the titanium-nickel wire is 0.05 to 0.1mm.

In the utility model, the handle portion includes the back handle set gradually, locking nut, nut, front hand grip, sheath Pipe and outer tube, back handle control mesh basket ontology stretch out outer tube and recycle into outer tube.

Oval, the area positioned at the first mesh basket section entirety hole of distal end after stone extraction basket release in the utility model Less than the area in the hole of the second mesh basket section of proximal end.

In the utility model, include the following steps:

Step 1: using the distal end of mesh basket ontology as endpoint, one end of small silk being fixed on the endpoint；

Step 2: one end of small silk is from endpoint, and extending to any mesh in the middle part of mesh basket ontology, middle part is a bit, small on one side The middle part of silk is fixed on the point, and the other end of small silk is from the fixed point along the endpoint of other side fold-back mesh basket body distal end；

Step 3: repeat step 2, until mesh basket ontology close to all mesh in distal end side be each divided into one group it is smaller Mesh.

In the utility model, small silk is woven in the half region of NiTi mesh basket.

The small silk of the utility model uses titanium-nickel wire.

The utility model has the advantages that the stone extraction basket proximal end bore of the utility model is big, remote stomidium is small, can very easily take out calculus, And prevent calculus from flowing out during withdrawing from stone extraction basket from distal end.And the cost of the utility model titanium-nickel wire is very low, makes It is woven in a specific way with the titanium-nickel wire of different thicknesses, it is higher than weld strength, and thinner outer tube can be taken in, excessively curved property It is good.

Detailed description of the invention

The utility model is done with reference to the accompanying drawings and detailed description and is further illustrated, the utility model Above-mentioned or otherwise advantage will become apparent.

Fig. 1 is mesh basket body construction schematic diagram；

Fig. 2 is the overall structure diagram that mesh basket ontology is in release conditions；

Fig. 3 is the overall structure diagram that mesh basket ontology is in recycling state.

Fig. 4 is the braiding schematic diagram of stone extraction basket.

Specific embodiment

It elaborates below in conjunction with attached drawing to the utility model.

Embodiment 1:

Such as Fig. 1, a kind of stone extraction basket used for medical procedures provided in this embodiment, including back handle 1, locking nut 2, nut 3, front hand grip 4, protecting pipe 5, outer tube 6, mesh basket ontology 7, the first mesh basket section 7a, the second mesh basket section 7b, third mesh basket section 7c, macropore 8 and aperture 9；It is the first mesh basket section 7a positioned at distal end, the first mesh basket section proximal end is the second mesh basket section 7b, in the first mesh basket section Area of the mesh area less than the mesh in the second mesh basket section.Second mesh basket section proximal end is additionally provided with third mesh basket section 7c, third net Mesh area in basket section is less than the mesh area in the second mesh basket section.First mesh basket section is equipped with one group of aperture 9, the second mesh basket Section is equipped with one group of macropore 8, and the area of aperture 9 is less than the area of macropore 8.Length in first mesh basket section 7a axial direction is mesh basket The half of the axial upper length of ontology 7.First mesh basket section 7a is made of titanium-nickel wire.The diameter of titanium-nickel wire is 0.05 to 0.1mm, The titanium-nickel wire for increasing by 0.05~0.1mm on existing mesh basket weaves.

A kind of weaving method of stone extraction basket used for medical procedures, includes the following steps:

Step 1: using the distal end of mesh basket ontology 7 as endpoint, one end of small silk being fixed on the endpoint；

Step 2: one end of small silk is from endpoint, and extending to any mesh in 7 middle part of mesh basket ontology, middle part is a bit, small on one side The middle part of silk is fixed on the point, and the other end of small silk is from the fixed point along the endpoint of 7 distal end of other side fold-back mesh basket ontology；

Step 3: repeat step 2, until mesh basket ontology 7 close to all mesh in distal end side be each divided into one group it is smaller Mesh.

Small silk is woven in the half region of NiTi mesh basket.In the present embodiment, small silk uses titanium-nickel wire.

Specifically, a kind of weaving method of stone extraction basket used for medical procedures: by titanium-nickel wire around NiTi mesh basket weaving in Mesh basket distal end, specific weaving method are as follows: such as Fig. 4, first fixing mesh basket main body silk in A point with distal end braided wires, then will Mesh basket main body silk is fixed in setting tooling, then small filament winding is taken up one's knitting relative to mesh basket main body silk direction, makes itself and mesh basket Main body is formed together small grid, and small silk passes through at B, when mesh basket main body is close at the C at mesh basket center, small silk is bent again Continue to extend toward mesh basket A point afterwards, be fixed again after reaching A point, such mesh basket distal end will form one section it is closeer than proximal end grid Mesh basket.In the present embodiment, small silk selects titanium-nickel wire, and the mesh of mesh basket body distal end is divided into four smaller nets by small silk Hole.

Handle portion includes the back handle 1 set gradually, locking nut 2, nut 3, front hand grip 4, protecting pipe 5 and outer tube 6, Back handle 1 controls mesh basket ontology 7 and stretches out outer tube 6 and recycle into outer tube 6.

Specific: the proximal end of mesh basket ontology 7 is macropore, and the part of the about entire mesh basket length 1/2 in distal end is aperture, the mesh basket Production method increases by 0.05~0.1mm of diameter titanium-nickel wire in 1/2 part of the distal end of mesh basket on this basis and compiles compared with mesh basket It knits, the macropore of mesh basket is become into aperture.Select small silk to weave, benefit is to reduce the sectional area after mesh basket is shunk, allow into Enter in outer tube.

By taking biliary tract stone extraction basket as an example, the present embodiment be in order to solve cholangiectasis and rubble after, maximum size is removed, but It is that a small amount of microlith can be left in bile duct, common mesh basket is difficult to entangle calculus, and conventional balloon size is less than normal, and big sacculus is not done again Method causes to expand the problem of position calculus can not be taken out in the gallbladder in-pipe of expansion.

Common metal stone extraction basket on the market is made of mesh basket ontology, outer tube and push Handleset etc. at present, wherein Mesh basket ontology includes again 304 stainless steel mesh baskets and Nitinol mesh basket, and conventional mesh basket shape includes hexangle type, spiral shape, spiral shell Rotation type includes 4 line spirals, 6 line spirals, and 8 line spirals select different mesh baskets according to different demands, but take stone for conventional, These mesh baskets have respective advantage, and spiral shape mesh basket generally uses nitinol alloy wire to make, the comparison that the shape of mesh basket is kept Good, hexangle type generally uses 304 stainless steel wires to make, and the mesh basket interporal lacuna of advantage is big, facilitates and takes out big calculus.But with The mesh basket of upper mesh basket structure will go wrong, mesh basket front and rear gaps are equally big, small when the microlith in biliary tract has been expanded in taking-up Calculus is easily accessible mesh basket, but microlith is also easy to omit out from mesh basket distal end simultaneously, at this time needs a kind of proximal end bore Greatly, calculus is facilitated to enter mesh basket, remote stomidium is small, so that the calculus entered is able to maintain the novel mesh basket in mesh basket, thus by net Basket takes bile duct out of, achievees the purpose that take stone.

In the present embodiment, conventional mesh basket shape includes hexangle type, spiral shape, and screw type includes 4 line spirals, 6 line spirals, and 8 Line spiral, the second mesh basket section that conventional mesh basket can be used for the present embodiment design different rulers according to the size for the explanation of being taken out Very little the second mesh basket section and the first mesh basket section, specific size meet calculus and enter from the second mesh basket section, can not be from the first mesh basket section Outflow.

The utility model provides a kind of stone extraction basket used for medical procedures, implements the method and approach of the technical solution Very much, the above is only the preferred embodiment of the utility model, it is noted that for the ordinary skill people of the art For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as the protection scope of the utility model.The available prior art of each component part being not known in the present embodiment is subject to reality It is existing.

Claims (7)

1. a kind of stone extraction basket used for medical procedures, which is characterized in that including handle portion and mesh basket ontology (7), the mesh basket sheet Body (7) includes more than two mesh basket sections, is the first mesh basket section (7a) positioned at distal end, and the first mesh basket section proximal end is the second mesh basket Section (7b), the area of the area of the mesh in the first mesh basket section (7a) less than the mesh in the second mesh basket section (7b).

2. a kind of stone extraction basket used for medical procedures according to claim 1, which is characterized in that the second mesh basket section proximal end It is additionally provided with third mesh basket section (7c), the mesh area in third mesh basket section is less than the mesh area in the second mesh basket section.

3. a kind of stone extraction basket used for medical procedures according to claim 1, which is characterized in that the first mesh basket Duan Shangshe There is one group of aperture (9), the second mesh basket section is equipped with one group of macropore (8), and the area of aperture (9) is less than the area of macropore (8).

4. a kind of stone extraction basket used for medical procedures according to claim 1, which is characterized in that the first mesh basket section (7a) Length in axial direction is less than the half of length in mesh basket ontology (7) axial direction.

5. a kind of stone extraction basket used for medical procedures according to claim 1, which is characterized in that the first mesh basket section (7a) It is made of titanium-nickel wire.

6. a kind of stone extraction basket used for medical procedures according to claim 5, which is characterized in that the diameter of the titanium-nickel wire is 0.05 to 0.11mm.

7. a kind of stone extraction basket used for medical procedures according to claim 1, which is characterized in that the handle portion includes successively Back handle (1), locking nut (2), nut (3), front hand grip (4), protecting pipe (5) and the outer tube (6) of setting, back handle (1) Control mesh basket ontology (7) is stretched out outer tube (6) and is recycled into outer tube (6).