JP3122718B2 - Sheath slide crushed stone basket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath slide type crushed stone basket which is inserted into a narrow part such as a living body duct to crush and collect calculus.

[0002]

2. Description of the Related Art For example, a medical catheter device is inserted into a narrow portion such as a biological duct, and performs procedures such as injection of a contrast agent, collection of foreign matter, collection of cells, and excision of a lesion. . Medical procedures using this type of catheter device have the advantage of being less invasive than surgical procedures involving skin incisions.

[0003] However, although the catheter device is generally very flexible and long, the portion to be treated is often deep in the human body, so that the catheter device is inserted into a target site in the human body. To do so requires special methods and skills. In addition, there are many cases in which insertion is difficult such that insertion is not possible even if the surgeon has considerable skill.

Conventionally, a method of inserting a catheter into a body cavity includes a method of inserting a catheter through a channel of an endoscope, a method of inserting a guide wire into a body cavity in advance, and inserting the guide wire under guidance of the guide wire. There is.

[0005] In the former case, the endoscope itself can be inserted by utilizing the angle function of the endoscope while monitoring the image of the endoscope. Therefore, it is possible to reliably reach the target portion. In addition, when the distal end of the insertion portion of the endoscope is inserted to the target site, it is easy to insert the catheter through the channel of the endoscope, so that the catheter can be securely inserted into the target site. There is.

However, of course, this method can only be used for a large lumen into which the insertion portion of the endoscope can be inserted. Therefore, there is a problem that it can be used only in a very limited part of the lumen of the human body.

In the latter case, since the catheter is inserted under the guidance of a guide wire, there is an advantage that the catheter can be applied to a narrow lumen into which an endoscope cannot be inserted, such as a coronary artery. However, unlike the case of using an endoscope, the angle function cannot be utilized, and the endoscope image cannot be monitored. Therefore, this method requires a very high level of skill and has a problem that the success rate of insertion into a target site is extremely low.

Further, there is known a sheath slide type crushed stone basket in which a crushed stone basket is inserted into a target site in a body cavity by using the above-mentioned catheter as a guide to crush and collect calculus. The crushed stone basket includes a coil sheath, a tube sheath, a basket wire inserted in the tube sheath, and having a basket forceps at a distal end thereof, and an operation unit having an operation knob for sliding the tube sheath. . The tube sheath is advanced and retracted by operating the operation knob of the operation unit, and can be easily inserted into a narrow lumen.

[0009]

However, in the above-described sheath slide type crushed stone basket, since the tube sheath and the coil sheath are relatively slidable in the axial direction, the position of the tube sheath relative to the coil sheath is not stable, and the crushed stone is not crushed. When crushing stones with a basket, there is a problem that the tube sheath does not fit inside the coil sheath and the stones do not break.

[0010] The present invention has been made in view of the above circumstances, and an object can be adjusted in length relationship Chi Yubushisu and co <br/> Irushisu performed accurately and easily, An object of the present invention is to provide a sheath slide type crushed stone basket excellent in operability.

[0011]

According to the present invention, in order to achieve the above object, a coil sheath, a tube sheath, a basket wire having a basket forceps at a distal end thereof, and a tube sheath and a coil sheath are relatively slid. In the sheath slide type crushed stone basket comprising an operation portion having an operation knob, a slide groove for sliding the operation knob is provided in the operation portion, and a plurality of locking grooves for locking the operation knob in the slide groove. Is provided.

According to the above construction, by sliding the operation knob along the slide groove, the tube sheath advances and retreats, and the operation knob is selectively locked in the plurality of locking grooves, so that the desired position can be obtained. The tube sheath can be locked.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of a sheath-slide type crushed stone basket, FIG. 1 shows a tip portion of a basket forceps, and FIG. 2 shows an operation unit of the sheath-slide type crushed stone basket. The sheath slide type crushed stone basket includes a coil sheath 14, a tube sheath, a basket wire having a basket forceps 12 at a distal end thereof, and an operation unit 10 having an operation knob 19 for sliding the tube sheath.

As shown in FIG. 2, the operating portion 10 of the sheath slide type crushed stone basket has a slide portion 15, and a slide groove 16 is provided in the axial direction of the slide portion 15. One distal locking groove 17 is provided at the distal end (projection side of the tube sheath) of the slide groove 16, and a plurality of proximal locking grooves 18 are provided at the proximal end (retraction side of the tube sheath). ing.

The slide groove 16 is provided with an operation knob 19 connected to the tube sheath, and the operation knob 19 is selectively locked in the base locking groove 18 so that the length relationship between the tube sheath and the coil sheath 14 can be improved. Can be adjusted, the tip surfaces of both sheaths can be matched, and adjustment can be performed easily.

FIG. 3 shows a second embodiment. For the same purpose as the first embodiment, a plurality of base locking grooves 18 are provided on both side edges on the base side of the slide groove 16. Things. With this configuration, the length relationship between the tube sheath and the coil sheath 14 can be adjusted more accurately and easily.

According to the above configuration, the following configuration is obtained. (Supplementary Note 1) In a sheath slide type crushed stone basket composed of a coil sheath, a tube sheath, a basket wire having a basket forceps at a distal end thereof, and an operation portion having an operation knob for sliding the tube sheath, A sliding slide crushed stone basket, wherein a slide groove for sliding the operation knob is provided, and a plurality of locking grooves for locking the operation knob are provided in the slide groove.

(Supplementary Note 2) The sheath slide type crushed stone basket according to Supplementary Note 1, wherein the locking groove is provided only on one side of the slide groove. (Supplementary note 3) The sheath slide type crushed stone basket according to supplementary note 1, wherein the locking groove is provided on both sides of the slide groove. (Supplementary Note 4) The sheath slide type crushed stone basket according to Supplementary Note 1, wherein the locking grooves are provided alternately on both sides of the slide groove.

[0019]

As described above, according to the present invention, the operation portion of the sheath slide crushed stone basket is provided with a slide groove for sliding the operation knob connected to the tube sheath, and the operation knob is provided on the slide groove. By providing a plurality of locking grooves for locking, the length relationship between the tube sheath and the coil sheath can be accurately and easily adjusted, and the operability can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a tip basket forceps according to a first embodiment of the present invention.

FIG. 2 is a side view of the operation unit of the crushed stone slide basket of the embodiment.

FIG. 3 is a side view showing an operation section of a sheath slide type crushed stone basket according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Operation part 12 ... Basket forceps 14 ... Coil sheath 16 ... Slide groove 18 ... Base end locking groove 19 ... Operation knob

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-261349 (JP, A) JP-A-61-113439 (JP, A) JP-A-1-77703 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) A61B 17/00-17/42 A61B 1/00

Claims (1)

(57) [Claims] 1. A sheath slide type lithotripter comprising a coil sheath, a tube sheath, a basket wire having a basket forceps at a distal end thereof, and an operation portion having an operation knob for relatively sliding the tube sheath and the coil sheath. In a basket, a sheath slide type crushed stone basket, wherein the operation portion is provided with a slide groove for sliding the operation knob, and the slide groove is provided with a plurality of locking grooves for locking the operation knob.