JPH0428571Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a grasping forceps, and particularly to a grasping forceps suitable for inserting into a living body such as an animal or a human body to extract a parasite or a foreign object. It is.

[Conventional technology]

In animals and humans, there are diseases caused by parasites or foreign substances. For example, filariasis (canine filariasis), which is caused by filariasis that parasitizes the heart and vascular system of dogs, causes severe circulatory disorders.
It is said to be responsible for 30% of dog problems. This disease is caused by white filarial worms, approximately 0.8 mm in diameter and 15 to 30 cm long, that parasitize the pulmonary artery or the right ventricle of the heart.

To date, the treatment for filariasis has been to remove the parasites through open-heart surgery, but this requires special techniques, is high risk, and has extremely problematic aspects such as postoperative aftercare. There are many.
In addition, in internal medicine, a method of killing and removing insects using arsenic material has been practiced, but this method has many disadvantages, such as dead insects being washed away and remaining in the pulmonary artery, causing serious side effects. In addition, for special types of disease, forceps are inserted through the external jugular vein to remove the parasite, but since these forceps are made of a hard material, only parasites located in a straight line can be removed. There are many disadvantages such as being able to extract only a few particles, which limits its use, and also being easy to damage living organisms.

In view of these circumstances, the applicant of the present application proposed a bending section that is composed of a plurality of mutually connected joint rings and is bent by the operation of a bending operation wire, as disclosed in Japanese Utility Model Application Publication No. 62-33815. A support tube provided on a nodal ring at the tip and having a sliding piece arranged inside; fixed teeth protruding from the tip of the support tube and forming one side of the forceps portion;
The other side of the forceps part is rotatably supported by the support tube and rotatably connected to the tip of the sliding piece, and opens in the direction of curvature of the curved part by operating an opening/closing operation wire provided on the sliding piece. We proposed a grasping forceps consisting of movable teeth and. With these grasping forceps, it is possible to effectively and efficiently remove parasitic parasites or foreign objects from a site that is extremely difficult to remove, such as the inside of a dog's heart, without having to perform thoracotomy or laparotomy.

[Problem that the invention seeks to solve]

However, when removing heartworms from a sick dog that is infested with a large number of heartworms, it is possible to remove them by using the grasping forceps described in the previous application, but when the number of heartworms decreases, the capture rate decreases and the number of heartworms decreases. % removal may take a long time, and there may be cases where complete removal has to be abandoned due to the dog's physical exhaustion or anesthesia.

The present invention was developed in view of these circumstances, and the purpose is to propose grasping forceps that can completely remove insect bodies in a short period of time.

[Means for solving problems]

The present invention consists of a curved part that bends via a bending operation wire when the hand control unit is operated, a fixed tooth placed at the tip of the curved part, and a fixed tooth that is connected to the fixed tooth via an opening/closing operation wire when the hand control unit is operated. A grasping forceps comprising: a forceps section having movable teeth that can be opened and closed; and a brush unit having bristles placed between the fixed teeth and the movable teeth is removably disposed. It is characterized by being

[Effect]

The grasping forceps according to the present invention are designed to easily remove heartworms remaining in the right atrium and pulmonary artery by entangling them in the bristles of a brush unit attached to the tip of the forceps.

During extraction, by rotating the tip of the forceps not only back and forth but also around the axis, it is possible to more effectively capture the insect bodies floating in the blood.

The grasping forceps according to the present invention has a brush-like capture section at the tip of the forceps, and the brush unit can be easily attached and detached with tweezers etc. before and after use.

[Example of idea]

Preferred embodiments of the grasping forceps according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the external structure of the grasping forceps according to the present invention. The grasping forceps according to the present invention is composed of a hand operation section 10 and an insertion section 12. The hand operation unit 10 is a guide tube 1
4. It consists of a bending operation knob 16 slidably fitted onto the guide tube 14, a forceps opening/closing operation knob 18, and a grip ring 20 formed at the rear end of the guide tube 14. In addition, the insertion section 12 is connected from the tip to the forceps section 2.
2, a curved portion 24, and a flexible portion 26. The flexible portion 26 has a two-stage structure including a portion 26A having a guide function for insertion and a highly flexible portion 26B for fitting along the heart during insertion. The parts 26A and 26B of the flexible part 26 can be formed by changing the structure of the closely wound coil, that is, the part 2
This is achieved by making the tightly wound state of portion 6B looser than that of portion 26A.

Next, the detailed structure of the grasping forceps according to the present invention will be explained with reference to FIG. First, the curved portion 24 is composed of a plurality of nodal rings 28, 28, . The two adjacent notches form a V-shaped notch, so that the node ring 28 can curve only in one direction, that is, in the upper direction in FIG. 2nd node ring 28
On the upper side in the figure, a hole 32 is formed by extending the notch and being pressed inward, and a bending operation wire 34 is inserted through the hole 32. The leading end of the node ring 28 is connected to a support tube 36, and the operating wire 34 is also connected to the rear end of the support tube 36. The rear end of the bending operation wire 34 is fixed to the bending operation knob 16, so that by pulling the bending operation knob 16, that is, moving it to the right in FIG. becomes curved upward as shown by the two-dot chain line in FIG. A tightly wound coil 38 is provided on the outer periphery of the bending operation wire 34.

The forceps section 22 is composed of fixed teeth 40 and movable teeth 42. The fixed tooth 40 is formed to protrude from the tip of the support tube 36, and is formed in a substantially L-shape as shown in the figure, with a rounded protrusion 44 formed at the tip. The movable tooth 42 is rotatably supported by the support tube 36 around a pin 46, and is formed such that its tip is located inside the protrusion 44 of the fixed tooth 40. Serrated teeth 40A and 42A are formed on the joint surfaces of both the fixed teeth 40 and the movable teeth 42 to provide a non-slip function when gripping a filarial insect, etc., and to prevent the filarial insect from being cut. It is constructed so that there is a gap. Furthermore, a sliding body 48 is disposed within the support tube 36 .
It is arranged so as to be able to freely slide in the axial direction. The rear end of the movable tooth 42 is rotatably connected to the tip of the sliding body 48 via a pin 49. pin 4
6 is arranged to be shifted in the opening direction with respect to the pin 49 as shown in FIG.
It can be opened and closed by rotating around 6.
O-rings 50 as sealing members are arranged on both sides of the sliding body 48 to prevent blood or the like from entering the grasping forceps insertion portion during operation of the grasping forceps.

In FIG. 3, the locking mechanism of the operating knobs 16, 18 is shown. That is, a lock lever 56 is provided on the front surface of the knob 16 so as to be rotatable about a pin 58, and a flat surface 59 is formed on the surface of the guide tube 14 that corresponds to the lock lever 56. Therefore, the lock lever 56 is rotated counterclockwise about the pin 58 in FIG. will be done. A similar lock lever 56 is also provided on the forceps opening/closing operation knob 18.

The forceps opening/closing operation knob 18 is provided with a spring 18A as shown in FIG.
is biased in the closing direction.

On the other hand, there is a fourth tooth between the fixed tooth 40 and the movable tooth 42.
A brush unit 60 shown in the figure is detachably arranged. As shown in FIG. 4, the brush unit 60 requires a substantially U-shaped main body 62, and pins 64 and 66 are formed at both ends of the main body 62 to prevent the brush from coming off. Furthermore, the main body 6 of this brush unit 60
On each side of the main body 62, four hairs 68, 68, 68, 6 made of single fibers are arranged on each side in the direction transverse to the main body 62.
8 are planted at equal intervals.

On the other hand, as shown in FIGS. 5a and 5b, a vertical groove 70 is formed in the center of the fixed tooth 40, and the depth of the vertical groove 70 is such that approximately half of the central portion 63 of the main body 62 can fit therein. ing. Furthermore, through-holes 72 and 74 are formed on both sides of the vertical groove 70 in communication with the vertical groove 70 and facing toward the back side, one of the through-holes 72 receives the pin 64 of the main body 62, and the other through-hole 74 receives the pin 64 of the main body 62. A pin 66 is inserted therein.

Similarly, a vertical groove 76 is formed approximately in the center of the movable tooth 42 as shown in FIGS. 6a and 6b.
6 is the central part 6 of the main body 62 of the brush unit 60.
It is formed at a depth that allows approximately the lower half of No. 3 to enter. When the brush unit 60 is housed in the vertical groove 70 of the fixed tooth 40 and the vertical groove 76 of the movable tooth 42 and closed, the bristles 68 of the brush unit 60 are disposed between the fixed tooth 40 and the movable tooth 42 as shown in FIG. tooth 40
It is placed between A and 42A and protrudes from both sides.

As shown in FIG.
The tip of an opening/closing operation wire 52 is fixed to the rear end of the opening/closing operation wire 52 . The rear end of this opening/closing operation wire 52 is fixed to the forceps opening/closing operation knob 18, and therefore, by moving the forceps opening/closing operation knob 18 back and forth on the guide tube 14, the movable teeth 42 are rotated around the pin 46. It can be opened and closed by moving. A curved operation wire 34 is attached to the outer periphery of this opening/closing operation wire 52.
Similarly, it is covered with a tightly wound coil 54.

The outermost portions of the curved portion 24 and the flexible portion 26 are covered with rubber 55 to provide a sealing function.

The operation of the grasping forceps according to the present invention constructed as described above is as follows. First, by grasping the ring 20 of the hand operation unit 10 and moving the bending operation knob 16 and the forceps opening/closing operation knob 18 with the thumb and index finger or the thumb and middle finger, the bending operation and the grasping operation of the filariasis can be performed. . That is, in order to remove the filarial worm 110 parasitic in the right ventricle 106 of the dog's heart shown in FIG.
The insertion part 12 of the forceps is inserted into the jugular vein 100 and the vena cava 10.
2. Insert into the right ventricle 106 (or pulmonary artery 08) via the right atrium 104, and then bend the operating knob 16
By pulling, tension is applied to the operating wire 34 to curve the bending part 24, and at the same time, the forceps opening/closing operating knob 18 is pushed to push out the operating wire 52 and move the sliding body 48 to the left in FIG. , open the movable tooth 42. In this state, the filariasis 110 is positioned between the fixed tooth 40 and the movable tooth 42, and then the movable tooth 42 is closed by pulling the operation knob 18, and the tooth 40A of the fixed tooth 40 and the movable tooth The filariasis 110 is sandwiched between the teeth 42A of 42,
In this state, the filarial worm 110 can be removed by pulling out the forceps from the body.

Here, the flexible part 26 of the insertion part 12 is composed of a part 26A serving as a guide tube and a highly flexible part 26B, so that it can be freely curved according to the insertion route into the dog's body. . Therefore, it is possible to reliably insert the forceps deep into the dog's heart, and this insertion is done through the blood vessels, but since the tip 44 of the forceps 22 is configured in a semicircular shape, the insertion is easy. This process is carried out smoothly and does not damage the dog's blood vessels. In addition, the curved portion 24 curves in only one direction during the bending operation, and the movable teeth 42 expand in the direction of the curve, so that the inner wall of the heart etc. will not be damaged when the movable teeth 42 open and close. Since it is opened on one side, the parasites are not pushed outward when opening and closing.
10 extractions can be performed efficiently.

If the number of heartworms 110 removed by the fixed teeth 40 and the movable teeth 42 decreases in this way, the efficiency of the method of removing them by sandwiching them between the fixed teeth 40 and the movable teeth 42 becomes poor. Then, one end of the forceps section 22 is pulled out from the jugular vein 100, and the brush unit 60 described above is disposed between the fixed teeth 40 and the movable teeth 42. That is, the knob 18 resists the biasing force of the spring 18A.
is moved to the left side in FIG. 2 to open the movable tooth 42, and the central portion 63 of the main body 62 of the brush unit is accommodated in the longitudinal groove 70 of the fixed tooth 40 and the longitudinal groove 76 of the movable tooth 42, and the protrusion 64 is moved to the left side in FIG. , 66 are inserted into the holes 72, 74 of the fixed tooth 42, the movable tooth 42 is closed by the biasing force of the spring 18A. Thereafter, the knob 18 is locked with the lock lever 56. In this state, the brush unit 60 is fitted and held in the vertical grooves 70 of the fixed teeth 40 and the vertical grooves 76 of the movable teeth 42, so that it will not be accidentally attached or detached. In this state, the forceps section 22 is again inserted into the jugular vein 100 as shown in the figure, and inserted into the right ventricle 106 through the vena cava 102 and the right atrium 104, and is inserted into the right ventricle 106 to remove heartworms 110 that are parasitic, for example, in the pulmonary artery 108. Rotate or pull out the brush part to remove floating dog heartworms 110.
can be wrapped around the hair body 68 and easily extracted outside the living body.

In the above embodiment, the forceps are inserted into the heart of a dog and explained as being used to remove the filarial worm 110 parasitic in the right ventricle of the dog. The forceps according to the present invention can also be used to remove parasites and the like from the lesion.

[Effect of idea]

As explained above, according to the grasping forceps according to the present invention, since the brush unit can be detachably installed between the fixed teeth and the movable teeth, there are many insect bodies such as heartworms. When the number of insects is reduced, the insects are caught between the fixed teeth and the movable teeth and removed, and when the number of insects is reduced, the brush unit is installed between the fixed teeth and the movable teeth and the brush is rotated. This allows insects to adhere to the brush and completely remove them. As described above, the grasping forceps according to the present invention can be used in two ways, so that insect bodies can be removed efficiently.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the external structure of the grasping forceps according to the present invention, FIG. 2 is a sectional view showing the internal structure of the grasping forceps according to the present invention, and FIG. 3 is an illustration of the operation knob of the grasping forceps according to the present invention. 4 is a perspective view of the brush unit, 5a is a front view of the fixed teeth, 5b is a bottom view of the fixed teeth, 6a is a front view of the movable teeth, FIG. 6b is a plan view of the movable tooth, FIG. 7 is a perspective view showing the brush unit attached to the forceps portion, and FIG. 8 is a perspective view showing the gripping forceps according to the present invention in use. 10... Hand operation section, 12... Insertion section, 22...
... Forceps part, 24... Curved part, 32... Curving operation wire, 40... Fixed teeth, 42... Movable teeth, 60...
... Brush unit, 68... Hair body, 70, 76...
...Vertical groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A curved part that bends via a bending operation wire when operated by a hand control unit, a fixed tooth disposed at the tip of the curved part, and an opening/closing operation wire by operating the hand control unit. A grasping forceps comprising: a forceps portion having a movable tooth that opens and closes relative to the fixed tooth through the grasping forceps, wherein bristles are planted between the fixed tooth and the movable tooth. A grasping forceps characterized in that a brush unit is arranged in a detachable manner. (2) The opposing joint surfaces of fixed teeth and movable teeth have
2. The grasping forceps according to claim 1, wherein grooves are formed in each groove, and the brush unit body is removably housed in each groove, and the bristles protrude laterally of the forceps portion.