Basket-type gripping forceps and basket-type gripping forceps system

Abstract

To provide a basket-type grasping forceps and a basket-type grasping forceps system that can smoothly release foreign objects such as gallstones from a basket wire into a body cavity without damaging the body cavity. [Solution] The basket-type grasping forceps system 2 comprises a grasping forceps 1, an endoscope M, a monitor M1, and a grasping forceps device 50. The grasping forceps 1 comprises a first grasping forceps 5 and a second grasping forceps 6. The first grasping forceps 5 has a first basket wire 11a, a first operating wire 20a, and a first knob 31. The second grasping forceps 6 has a second basket wire 11b, a second operating wire 20b, and a second knob 32. By moving the first knob 31 toward the rear end along the axial direction of the tube 52, the tip portion 12 rotates laterally, allowing foreign matter inside the basket wire 11 to be discharged outside the basket wire 11.

Description

Technical Field

[0006] , , , ,

[0001] The present invention relates to a basket-type grasping forceps and a basket-type grasping forceps system, which are medical instruments inserted into a body conduit such as a bile duct to remove foreign substances therein.

Background Art

[0002] Conventionally, a basket-type grasping forceps system for inserting into a body conduit such as a bile duct and collecting foreign substances such as stones has been known.

[0003] For example, Patent Document 1 discloses a basket-type grasping forceps that can evenly make the interval between elastic wires even and reliably grasp stones or the like even in a narrow body cavity by using both valley folds and mountain folds at the bending point of the basket wire.

[0004] Further, Patent Document 2 discloses a basket-type grasping forceps provided with a first binding portion that binds a plurality of basket wires and connects them to an operation wire, and a second binding portion that is not connected to the first binding portion, and can easily release foreign substances held in the basket.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] With conventional basket-type grasping forceps, when collecting (removing) foreign objects such as gallstones, basket impaction can occur when collecting multiple gallstones or large gallstones, preventing the basket-type grasping forceps from being removed from the bile duct. Attempting to forcibly remove the basket-type grasping forceps from this impaction can lead to perforation, severe bleeding, mucosal damage, and edema.

[0007] While the basket-type grasping forceps disclosed in Patent Document 1 cannot release gallstones, Patent Document 2 allows for the release of collected gallstones from within the basket. However, the second binding portion becomes free within the bile duct, making it difficult to control, increasing the time required for release and burdening the patient, and there is a problem (issue) that the second binding portion can damage the bile duct wall.

[0008] In view of the above circumstances, the present invention aims to provide a basket-type grasping forceps and a basket-type grasping forceps system that can prevent basket impaction and smoothly release foreign objects such as gallstones from the basket wire into the body cavity without damaging the body cavity.

[0009] Furthermore, this problem (issue) does not preclude the existence of other problems. Also, each aspect of the present invention described later does not need to solve all of these problems (issues). Moreover, it is possible to extract other problems (issues) from the description in the specification, drawings, or claims. [Means for solving the problem]

[0010] As a result of diligent research and development regarding the above-mentioned problems, the inventors of this invention have discovered the following groundbreaking basket-type gripping forceps and basket-type gripping forceps system.

[0011] A first aspect of the present invention for solving the above problems is a basket-wire type grasping forceps used in endoscopic surgery when collecting foreign objects, which is inserted into a tube of a grasping forceps device and has a plurality of basket wires at the tip end and a knob at the rear end, comprising a first grasping forceps and a second grasping forceps, wherein the first grasping forceps has at least one first basket wire, a first operating wire and a first knob, and the second grasping forceps has a plurality of second basket wires, a second operating wire and a second knob, the first and second basket wires are all bound together at a tip portion located at the tip end, and only the second basket wire is bound together at a coupling portion located at the rear end of the second basket wire, the first and second grasping forceps can each be operated independently, and by fixing the second knob and moving the first knob toward the rear end of the tube along the axial direction of the tube, the tip portion rotates laterally with respect to the axial direction of the tube.

[0012] In this first embodiment, if the number and size of foreign objects (e.g., gallstones) collected in the basket wire make it difficult to remove them from the body cavity, the basket wire can be tilted by operating the first knob, increasing the pitch between the first and second basket wires, and allowing the foreign objects to be released from the basket wire. This allows the foreign objects, such as gallstones, in the basket wire to be smoothly released into the body cavity without damaging the body cavity. Furthermore, the pitch can be adjusted not only by operating the first knob but also by operating the second knob, making it easier to release the foreign objects from the basket wire according to their size and other factors.

[0013] A second aspect of the present invention is a basket-wire type gripping forceps according to the first aspect, characterized in that the number of first basket wires is less than the number of second basket wires.

[0014] In this second embodiment, the reduced number of first basket wires allows them to be easily pulled towards the rear end.

[0015] A third aspect of the present invention is a basket wire type gripping forceps according to the first or second aspect, characterized in that a first operating wire is connected to a first basket wire by a first connecting portion, a second operating wire is connected to a second basket wire by a second connecting portion, and the first connecting portion and the second connecting portion are spaced apart in the tube along the axial direction of the tube.

[0016] In this third embodiment, the connecting portion is made by adhesive, soldering, welding, etc., and has a certain width and size. By offsetting the positions of the first and second connecting portions, the insertion of the first and second gripping forceps into the tube can be facilitated without damaging the inner wall of the narrow tube.

[0017] A fourth aspect of the present invention is a basket-type gripping forceps according to the third aspect, characterized in that when the first knob moves toward the rear end of the tube, the distance between the first connecting portion and the second connecting portion increases further.

[0018] In this fourth embodiment, it is possible to prevent the second connecting portion and the first connecting portion from overlapping within the tube.

[0019] A fifth aspect of the present invention is a basket-type gripping forceps according to the first aspect, characterized in that the first knob and the second knob are formed separately, and both simultaneous and independent operation can be selected.

[0020] In this fifth embodiment, the first knob and the second knob are formed separately, allowing for simultaneous operation of general operations such as foreign object collection, and independent operation when it is necessary to remove foreign objects from the basket wire. Fine adjustment of each knob during collection is also possible, improving the ease of removing foreign objects and the collection rate.

[0021] A sixth aspect of the present invention is a basket-type gripping forceps according to the fifth aspect, characterized in that the first knob and the second knob have distinctly identifiable shapes.

[0022] In such a sixth aspect, since it is possible to understand at hand which is the first knob and which is the second knob, it is possible to surely operate without mistake.

[0023] A seventh aspect of the present invention resides in the basket-type grasping forceps according to the sixth aspect, characterized in that the form is a shape.

[0024] In such a seventh aspect, if it is a shape, the combination width of the first knob and the second knob is widened, and simultaneous operation and independent operation can be surely performed.

[0025] An eighth aspect of the present invention resides in the basket-type grasping forceps according to the seventh aspect, characterized in that the first knob and the second knob each have a fitting portion.

[0026] In such an eighth aspect, since the first knob and the second knob are often operated simultaneously, they can be operated at hand without being separated, and there is no need to look at the knobs one by one, and it is possible to operate while reassuringly looking at the monitor.

[0027] A ninth aspect of the present invention resides in the basket-type grasping forceps according to the seventh or eighth aspect, characterized in that the first knob has an L-shaped form composed of a base and a standing wall, the second knob has a rectangular form so as to fit into a space composed of the base and the standing wall, and the second knob is restrained from moving to the rear end side by the standing wall.

[0028] In such a ninth aspect, when removing the collected foreign matter from the basket wire, an operation of pulling the first knob to the rear end side is performed. However, even if the second knob is accidentally operated to the rear end side, it cannot move to the rear end side alone because of the structure, so it is possible to surely and reassuringly operate without mistake. In particular, it is performed while looking at the monitor during surgery, but there is little need to look at the operation of the knobs. By preventing misoperation, it is possible to improve the efficiency of the surgery.

[0029] A tenth aspect of the present invention is a basket-type grasping forceps system, characterized by comprising a basket-type grasping forceps described in the first or second aspect, an endoscope, a monitor for displaying images captured from the endoscope, and a grasping forceps device having an operating unit and a tube fixed to the operating unit.

[0030] In this tenth embodiment, if it is difficult to remove foreign objects (e.g., gallstones) collected in the basket wire from the body cavity due to their number or size, the tilt of the basket wire can be determined by operating the first knob while viewing the image on a monitor from the endoscope. By increasing the pitch between the first and second basket wires, the foreign objects can be released from the basket wire. This allows for the smooth release of foreign objects such as gallstones from the basket wire into the body cavity without damaging the body cavity. Furthermore, by operating not only the first knob but also the second knob, the pitch can be adjusted while viewing the monitor, making it easier to release foreign objects from the basket wire according to their size and other factors. [Brief explanation of the drawing]

[0031] [Figure 1] This is an explanatory diagram illustrating the outline of the basket-type gripping forceps system according to the present invention. [Figure 2] This is an explanatory diagram showing Figure 1 in more detail. [Figure 3] Figure 2 is a side view of the basket section when it is opened, including a cross-sectional view of the tube tip. [Figure 4] Figure 3 is a front view of the basket section as seen from the top of the chip. [Figure 5] Figure 2 is a schematic diagram showing the connection state of a pair of basket wires, where (a) is a parallel connection and (b) is a spiral connection. [Figure 6] This is a side view showing the relationship between the first basket wire and the second basket wire of the basket section in Figure 3. [Figure 7] Figure 3 is a schematic diagram showing how to release the collected gallstones from the basket into the outside. [Figure 8]Figure 2 shows an example of the knob, with (a) being a side view and (b) being an exploded perspective view. [Figure 9] Following Figure 8, (a) is a side view of Example 2, (b) is a cross-sectional view AA of (a), and (c) is a side view of Example 3. [Figure 10] Figure 1 is an explanatory diagram of the surgery to retrieve gallstones from the bile duct, with (a) showing the stone retrieval process and (b) showing the stone being removed from the basket. [Modes for carrying out the invention]

[0032] The following describes in detail specific embodiments of the basket-type gripping forceps according to the present invention with reference to the drawings. However, the present invention is not limited to the following embodiments.

[0033] (Embodiment 1) Grasping forceps are endoscopic instruments used for retrieving tissues removed from the stomach, lungs, pancreatic and bile ducts, and for removing foreign objects (such as gallstones). While various forceps shapes exist to suit the object being grasped and the symptoms, this embodiment focuses on basket-type grasping forceps, in which the tip of the forceps is shaped like a basket.

[0034] In order to make the configuration of the present invention easier to understand, the side of the basket-type grasping forceps that is positioned on the target site inside the body will be referred to as the tip side, and the side opposite the tip side and located outside the body will be referred to as the posterior end side. The same will be used to describe the partial configuration.

[0035] As shown in Figure 2, the basket-type gripping forceps (hereinafter referred to as gripping forceps) 1 according to this embodiment comprises a basket portion 10 at the tip, a long, slender operating wire 20 connected to and fixed to the basket portion 10, and a knob 30 at the rear end connected to and fixed to the operating wire 20.

[0036] Furthermore, as shown in Figure 1, the basket-type grasping forceps system 2 according to this embodiment comprises grasping forceps 1, an endoscope M, a monitor M1, and a grasping forceps device 50. The grasping forceps device 50, which can be operated by a physician's hand under the endoscope M, is used to collect, for example, stones (gallstones) lodged in the bile ducts in the basket section 10 that is sent into the body, and then break up or expel them.

[0037] The grasping forceps device 50 comprises an operating section 51 and a tubular, elongated tube (sheath) 52 fixed to the tip of the operating section 51. The grasping forceps 1 are inserted through the tube 52. The tube 52 also serves as a passage for the endoscope M and guidewire, as well as a passage for contrast agent. In Figure 1, the grasping forceps 1 are shown by a dotted line.

[0038] The operating section 51 is provided with an insertion port 53 for inserting the grasping forceps 1. The surgery is performed while viewing the image captured from the endoscope M on the monitor M1. The guidewire is inserted into the body to the target site where the stone is located, and the tube 52, the basket portion 10 of the grasping forceps 1, and the operating wire 20 are inserted into the body along the guidewire. By gripping the handle 30 with the hand and moving the handle 30 toward the tip, the basket portion 10 is pushed out from the tip of the tube 52, and the foreign body such as the stone is collected by the basket portion 10.

[0039] As shown in Figures 2 and 3, the basket section 10 comprises a plurality of basket wires 11, a tip section 12 located at the front end that bundles all of the basket wires 11 together, and a connecting section 13 located at the rear end of the basket section 10 that bundles the plurality of basket wires 11 together. The basket section 10 is folded when located inside the tube 52 (see Figure 2), and expands into a bag shape when it is protruding from the front end of the tube 52 and is open (see Figure 3).

[0040] Here, the basket wire 11 is made of, for example, a nickel-titanium alloy and formed from a shape memory alloy. When no external force is applied (when it protrudes from inside the tube 52), the multiple basket wires 11 form a spindle shape. As shown in Figure 4, the pitch P between the basket wires 11 widens towards the center, making it easier to collect foreign matter.

[0041] As shown in Figure 3, multiple basket wires 11 are bundled together and connected and fixed to the operating wire 20 by a connecting part 21. The means of this connection and fixing are known methods such as adhesive bonding, silver brazing, soldering, and welding, and the connecting part 21 is made of adhesive, silver brazing, solder, welding, etc.

[0042] In the grasping forceps 1 of this embodiment, as shown in Figures 3 and 4, two basket wires 11 are paired together, and these four pairs are arranged axially from the rear end to the front end. Furthermore, these four pairs branch off from a branching point 14 near the center, and the front end consists of eight basket wires 11, forming the front end of the basket section 10, which is designed to collect smaller foreign objects (e.g., kidney stones) and prevent them from falling out of the basket section 10. On the other hand, the rear end of the basket section is formed by four pairs.

[0043] As shown in Figure 4, the expanded basket section 10 has basket wires 11 spreading evenly in all directions from the tip section 12. This even distribution prevents uneven distribution, and the pitch P, which is the distance between adjacent basket wires 11, is the same.

[0044] Furthermore, as mentioned above, the basket section 10 does not necessarily need to branch at the upper end, and may be composed of four basket wires 11. Also, when two wires are used to form a pair, the small diameter of the basket wires 11 can be reinforced by joining the two basket wires 11 in parallel (see Figure 5(a)) or by combining them in a spiral (see Figure 5(b)). In this embodiment, the two basket wires 11 are joined in parallel.

[0045] The gripping forceps 1 of this embodiment is characterized in that, as shown in Figures 2 and 3, the gripping forceps 1 comprises a first gripping forceps 5 and a second gripping forceps 6. The first gripping forceps 5 has a first basket wire 11a consisting of a pair of basket wires 11, a first connecting portion 21a, a first operating wire 20a, and a first knob 31. The second gripping forceps 6 has a second basket wire 11b consisting of a plurality of basket wires 11, a second connecting portion 21b, a second operating wire 20b, and a second knob 32.

[0046] The first basket wire 11a and the second basket wire 11b are all integrally bound together at the tip portion 12 at the front end. The second basket wire 11b is bound at the joint portion 13 at the rear end of the basket portion 10. However, as shown in Figures 2, 3, and 6, the first basket wire 11a is not bound at the joint portion 13. That is, the joint portion 13 is only used to bind the second basket wire 11b. This allows the first basket wire 11a and the second basket wire 11b to operate independently. Note that if there are three or more first basket wires 11a, a first joint portion is required to bind the first basket wires 11a, and the joint portion 13 will be described as the second joint portion, but the fact that the first basket wire 11a and the second basket wire 11b can operate independently remains unchanged.

[0047] The first grasping forceps 5 are operated by the operation of the first knob 31, and the second grasping forceps 6 are operated by the operation of the second knob 32. The operation involves moving them back and forth along the axial direction of the tube 52, rotating them, etc. Basic operations such as moving to the target site, collecting, and lifting from the body are performed simultaneously, but if it is necessary to release the collected gallstone from the basket 10, the first grasping forceps 5 and the second grasping forceps 6 are operated independently. For example, if the gallstone collected in the basket 10 cannot be broken up, or if the basket 10 cannot be removed from the bile duct, the operation is basically performed by operating only the first grasping forceps 5 to remove the gallstone from the basket 10. In this way, the first grasping forceps 5 and the second grasping forceps 6 are configured to be operated independently.

[0048] If too many stones are collected in the basket section 10, or if the stones are large, basket impaction may occur, making it impossible to withdraw the basket section 10 from the bile duct. Forcibly moving the basket section 10 towards the posterior end may lead to perforation, massive bleeding, mucosal damage, and edema.

[0049] Therefore, by moving the first knob 31 towards the rear end along the axial direction of the tube 52 (see arrow A in Figure 7), the first basket wire 11a is pulled towards the rear end of the basket section 10 (see arrow B in Figure 7). The tip section 12 appears to be pulled by the first basket wire 11a, and the second basket wire 11b rotates so as to tilt laterally around the joint 13 (arrow C in Figure 7), resulting in the tip section 12 tilting laterally relative to the axial direction of the tube 52. Although somewhat complex, the first knob 31 may be moved towards the rear end while the second knob 32 is moved towards the front end. This reduces the load on the basket wire 11 when it deforms.

[0050] This widens the pitch P (see double arrows to P in Figure 7), which is the distance between the first basket wire 11a and the second basket wire 11b at the rear end of the basket section 10, causing the gallstones collected inside the basket section 10 to detach from it. By returning the first knob 31 to the tip side, the basket section 10 returns to the state shown in Figure 3, allowing for the collection of gallstones from the bile duct using the basket section 10.

[0051] When removing a gallstone from the basket section 10, since the first knob 31 and the second knob 32 are separate, if adjusting only the first knob 31 is difficult, the tilt angle of the tip section 12 can be adjusted by adjusting the movement of the second knob 32, making it easier to remove the gallstone. Furthermore, during gallstone extraction, it is possible to make gallstone extraction easier by moving the first knob 31 and the second knob 32 separately, thereby improving ease of operation and extraction rate. The first knob 31 and the second knob 32 can be operated simultaneously or independently to suit various situations.

[0052] Here, the first gripping forceps 5 and the second gripping forceps 6 each have a first connecting portion 21a and a second connecting portion 21b, and the first connecting portion 21a and the second connecting portion 21b are basically located inside the tube 52. The connecting portion 21 is fixedly joined to the basket wire 11 and the operating wire 20 by means of adhesive bonding, silver brazing, soldering, welding, etc., and has a predetermined width (width in the direction perpendicular to the axis of the tube). If they are in the same position within the narrow insertion hole of the tube 52, it becomes difficult to insert the gripping forceps 1 into the tube 52, causing problems such as damage to the inner wall of the tube 52. In this embodiment, the first connecting portion 21a and the second connecting portion 21b are spaced apart with respect to the axial direction of the tube 52, making it easier to insert the first gripping forceps 5 and the second gripping forceps 6 into the tube 52.

[0053] Furthermore, when releasing the quarried stone from the basket section 10, the first knob 31 is moved towards the rear end along the axial direction of the tube 52. However, the first connecting section 21a moves to a position further away from the second connecting section 21b, thus preventing the first connecting section 21a and the second connecting section 21b from overlapping within the tube 52.

[0054] Furthermore, in this embodiment, when releasing quarry material from the basket section 10, the second basket wire 11b is moved toward the tip, so the second connecting section 21b is positioned toward the tip of the tube 52 compared to the first connecting section 21a, thereby preventing the first connecting section 21a and the second connecting section 21b from overlapping within the tube 52.

[0055] The first basket wire 11a may consist of a single basket wire or multiple basket wires, but it is desirable that the second basket wire 11b consists of multiple wires. Furthermore, the number of first basket wires 11a should be less than the number of second basket wires 11b. This makes it easier to pull the first basket wires 11a in, and thus makes it easier to rotate the basket.

[0056] The knob 30 includes a separate first knob 31 and a second knob 32, and the first knob 31 and the second knob 32 will be described in detail with reference to Figures 8 and 9.

[0057] First, the first knob 31 in Example 1 (Figure 8) comprises a rectangular base 31a and a vertical wall 31b rising from one end of the base 31a, and has an L-shape in side view. The second knob 32 has a rectangular shape so as to fit into the space formed by the base 31a and the vertical wall 31b. The first knob 31 is equipped with a first fitting portion 31c, and the second knob 32 is equipped with a second fitting portion 32c. The first fitting portion 31c has a convex shape that protrudes from the vertical wall 31b toward the tip, and the second fitting portion 32c, which fits into the convex shape, has a concave shape. By fitting the first fitting portion 31c and the second fitting portion 32c together, the first knob 31 and the second knob 32 can be integrated, making simultaneous operation easy.

[0058] Furthermore, when releasing the quarried stone from the basket section 10, the first knob 31 is moved towards the rear end along the axial direction of the tube 52, but the movement of the second knob 32 is prevented by the vertical wall 31b to prevent it from being accidentally moved towards the rear end.

[0059] Next, in the second embodiment (Figure 9(a)(b)), the knob 30 consists of a first knob 31 and a second knob 32 that are fitted together. The first fitting portion 31c of the first knob 31 is a groove formed near the center, and this groove has a trapezoidal cross-section. The second fitting portion 32c of the second knob 32 is a projection that protrudes from the bottom surface, and the first fitting portion 31c and the second fitting portion 32c are fitted together and integrated. As a result, the first knob 31 and the second knob 32 can be easily operated simultaneously.

[0060] The first fitting portion 31c has a predetermined length and includes an end portion 31d. The end portion 31d prevents the second knob 32 from moving toward the rear end. Similar to the knob in Embodiment 1, this prevents the second knob 32 from being accidentally moved toward the rear end. Furthermore, because the cross-sectional shapes of the first fitting portion 31c and the second fitting portion 32c are trapezoidal, the first knob 31 and the second knob 32 do not easily separate, allowing for safe simultaneous operation.

[0061] Furthermore, in Example 3 (Figure 9(c)), the knob 30 has different marks 31e and 32e on the surfaces of the first knob 31 and the second knob 32. The different marks help to prevent accidental operation, such as accidentally operating the first knob 31 when moving the second knob 32. The colors of the first knob 31 and the second knob 32 may also be different.

[0062] As explained above, the first knob 31 and the second knob 32 are separate components and can be operated independently. If the first knob 31 and the second knob 32 have different shapes, markings, or colors that allow the operator to distinguish between them, the operator can confidently operate them simultaneously or independently without making a mistake.

[0063] Next, based on Figure 10, the use of the basket-type grasping forceps 1 of this embodiment will be explained using endoscopic bile duct stone removal, in which gallstones are found in the bile duct and the procedure involves crushing or removing the gallstones, as an example.

[0064] There are multiple gallstones 110 in the common bile duct 100. While viewing the monitor M1 image and fluoroscopic image of the endoscope M, the tip of the guidewire is used as appropriate to pre-position the tip of the guidewire to the target site on the gallstone. The tip of the grasping forceps 1 is inserted through the insertion port 53 of the operating unit 51 (see Figure 1), and the tip of the grasping forceps 1 is placed at the target site along the guidewire.

[0065] Next, the knob 30 is moved towards the end along the axial direction of the tube 52, and the basket section 10 is sent out of the end of the tube 52 into the bile duct. As no external force is applied to the basket section 10, the basket wire 11 expands outward, and the basket section 10 becomes bag-shaped, allowing for stone collection (see Figure 10(a)).

[0066] Subsequently, stone collection becomes possible by moving the knob 30 back and forth along the axial direction of the tube 52 and rotating it. However, there are cases where the basket section 10 cannot be removed from the common bile duct 100 due to the collected stones in the basket section 10. In such cases, by moving the first knob 31 towards the rear end of the tube 52, the basket section 10 rotates, the pitch P of the first basket wire 11a and the second basket wire 11b opens, and the stones in the basket section 10 are released into the common bile duct 100 (see Figure 10(b)).

[0067] (Other embodiments) In Embodiment 1, the first operating wire 20a was described as a single operating wire, but two first basket wires 11a may be used instead. In that case, the first connecting portion 21a does not need to be provided. It is also possible to integrate the connecting portion 13 and the second connecting portion 21b, and the first gripping forceps 5 may not have the first connecting portion 21a, and the second gripping forceps 6 may not have the second connecting portion 21b.

[0068] Furthermore, the present invention is not limited to the embodiments described above, and can be modified, improved, etc., as appropriate. In addition, the material, shape, dimensions, numerical values, form, number, placement, etc. of each component in the embodiments described above are arbitrary and not limited, as long as they can achieve the present invention. [Explanation of Symbols]

[0069] 1. Basket-type gripping terminal 2. Basket-type grasping forceps system 5 First grasping forceps 6 Second grasping forceps 10 Basketball Club 11 Basket wire 11a First basket wire 11b Second basket wire 12 Chip section 13 Joint 14 Branching points 20 Operating wires 20a First operating wire 20b Second operating wire 21 Connecting part 21a 1st connection part 21b 2nd connection part 30 Knobs 31. First knob 31a Base 31b Standing wall 31c 1st fitting part 31d Termination 31e Mark 32. Second knob 32c 2nd fitting part 32e Mark 50 Grasping forceps device 51 Operation section 52 tubes 53 Insertion opening 100 Common bile duct 110 Stones M Endoscope M1 Monitor

Claims

1. A basket-wire type grasping forceps used in endoscopic surgery to collect foreign objects, inserted into the tube of a grasping forceps device, and equipped with multiple basket wires at the tip and a knob at the posterior end, First gripping forceps, A second gripping forceps is provided, The first gripping forceps has at least one first basket wire, a first operating wire, and a first knob. The second gripping forceps has a plurality of second basket wires, a second operating wire, and a second knob. The first basket wire and the second basket wire are all bound together at the tip portion located at the end. At the joint located on the rear end side of the second basket wire, only the second basket wire is bound together. The first gripping forceps and the second gripping forceps can each be operated independently. The tip portion rotates laterally relative to the axial direction of the tube by fixing the second knob in place and moving the first knob toward the rear end of the tube along the axial direction of the tube. Basket-type grasping forceps.

2. The number of the first basket wires is characterized by being less than the number of the second basket wires. The basket wire type gripping forceps according to claim 1.

3. The first operating wire is connected to the first basket wire at the first connecting portion. The second operating wire is connected to the second basket wire at the second connecting portion. The first connecting portion and the second connecting portion are characterized in that they are spaced apart within the tube along the axial direction of the tube. A basket wire type gripping forceps according to claim 1 or 2.

4. The first knob moves toward the rear end of the tube, and the distance between the first connecting portion and the second connecting portion increases further. The basket-type gripping forceps according to claim 3.

5. The first knob and the second knob are formed as separate components, and both simultaneous and independent operation can be selected. The basket-type gripping forceps according to claim 1.

6. The first knob and the second knob are characterized by having distinctly distinguishable shapes. The basket-type gripping forceps according to claim 5.

7. The aforementioned form is characterized by its shape. The basket-type gripping forceps according to claim 6.

8. The first knob and the second knob are each characterized by having a fitting portion. The basket-type gripping forceps according to claim 7.

9. The first knob has an L-shape consisting of a base and a vertical wall, The second knob has a rectangular shape so as to fit into the space formed by the base and the vertical wall. The second knob is characterized in that its movement toward the rear end is prevented by the vertical wall. The basket-type gripping forceps according to claim 7 or 8.

10. A basket-type gripping forceps according to claim 1 or 2, Endoscope and, A monitor that displays the images captured from the endoscope, A gripping forceps device comprising an operating section and a tube fixed to the operating section, Basket-type grasping forceps system.

Images