JP3897998B2 - Graft grasper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a graft grasper. More specifically, the invention of this application relates to a graft grasper that is useful in cardiac bypass surgery or the like and can be grasped while a graft is easily and gently protected by suction.
[0002]
[Prior art and its problems]
Traditionally, grafts (vascular fragment tissues) cut from other parts of the body, specifically lower limbs, when performing cardiac bypass surgery to anastomosed bypass blood vessels to ensure blood flow to the myocardium that lacks blood flow The large saphenous vein, the internal thoracic artery on the back of the sternum, or the omental artery of the stomach are used as bypass grafts.
[0003]
In cardiac bypass surgery, the graft as described above is anastomosed to the coronary artery of the heart, but all the grafts are as thin as about 2 mm in diameter, and the vascular wall is fragile, so handling is necessary.
[0004]
In particular, during anastomosis, the thread is put on the stump of the graft while grasping the graft, but the graft vessel wall damage that accompanies the grasping increases in thickness during recovery. It leads to stenosis and interferes with its role as a bypass vessel. Therefore, in order to prevent such vascular wall damage, an operation and technique that can gently protect the graft when grasping the graft is required.
[0005]
However, the tweezers conventionally used for grasping a graft has a structure in which an object is sandwiched and grasped by two metal plates, and when performing cardiac bypass surgery, as shown in FIG. Since the stump of the blood vessel wall of the graft (2) is gripped using two tweezers (1), there is a high risk of local damage to the graft (2) due to the gripping operation.
[0006]
Further, since it is required to grip the graft (2) with a minimum force that can be gripped so that local damage to the graft (2) does not occur, skill is required in the basic simple operation of gripping.
[0007]
In order to avoid the above-mentioned local damage, as the tweezers for gripping the graft, the grip portion at the tip (portion for gripping the graft) is specially processed into a ring shape, and the pressure on the graft vessel wall when gripped Some of them have been devised so as not to hit one point.
[0008]
However, even with such tweezers, it is necessary to be skilled in grasping itself with two tweezers while confirming a thin graft having a diameter of about 2 mm with a magnifying glass.
[0009]
When performing a cardiac bypass surgery, the first assistant standing in a position facing the surgeon is responsible for this gripping operation, but concentrates all the nerves on the gripping operation that is sensitive and gentle, and the operator performs the anastomosis operation. It is extremely difficult to secure the anastomosis of the graft stump so that it is easy.
[0010]
For this reason, blood suction operations other than the grasping operation of the graft and the attachment of the clip to the thread hung on the graft stump are shared by the second assistant.
[0011]
However, if a large number of people enter a narrow operative field, the operative field will become more congested and the operation will become complicated.
[0012]
In view of the above background, there is a demand for development of an instrument that can be grasped while being simple and without any skill, and gently protecting the graft.
[0013]
Accordingly, the invention of this application has been made in view of the circumstances as described above, and solves the problems of the prior art, and provides a device that sufficiently protects the graft sufficiently and easily holds it. It is said.
[0014]
[Means for Solving the Problems]
The invention of this application, as to solve the above problems, the first of all has a suction gripping unit comprising a circular hollow tube, a handle portion connected thereto, by suction at the suction引把lifting unit There is provided a graft grasping device characterized by grasping a graft.
[0015]
Secondly, in the first invention, there is provided a graft grasper characterized in that suction ports are provided at a plurality of locations on the inner wall of the suction grasping portion.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the conventional problems, the graft grasping device of the invention of this application has a structure in which the graft as a target is not sandwiched with tweezers but is grasped by sucking the graft from the outside of the graft by the suction grasping portion. .
[0019]
As a specific structure, the graft gripper of the invention of this application can be formed by deforming, for example, one unbroken hollow tube and forming a circular suction gripping portion at the tip thereof. Of course, in this case, a plurality of hollow tubes can be connected as well as a single hollow tube without a break. Then, thus the suction gripping portion formed, it Ru provided the handle portion comprising a hollow tube communicating. In the above example, the entire graft grasper has a hook shape. In order to make it easier to hold the handle, a grip portion may be provided outside the handle.
[0020]
The reason why the suction gripping part is preferably circular is that the graft is cylindrical, and that the inner diameter is slightly (about 1 mm) larger than the outer diameter of the graft. A suction port is formed in the inner wall of the suction gripping part by, for example, making a plurality of evenly arranged holes, and suctioning and gripping the outer surface of the graft by applying negative pressure to the graft gripper and sucking from the suction port of the suction gripping part. The graft can be gripped by adsorbing to the inner wall of the portion with a good shape balance.
[0021]
By grasping the graft in this way, damage to the graft can be reduced as compared with the case of grasping with the tweezers, and a grasping operation for gently protecting the graft becomes possible.
[0022]
Of course, the hole as the suction port in the above example is not limited to a circular shape, and various shapes such as an elliptical shape, a square shape, a horizontally long slit shape, and a vertical slit shape are considered. Further, the suction gripping portion may have a branch structure that is not only a circular shape as described above, for example, a substantially circular shape as in the embodiments described later, but also a U-shape or a Y-shape, and L A letter shape etc. may be sufficient and various shapes are considered.
[0023]
In any case, according to the present invention, no skill is required for grasping the graft, and the graft grasping operation which has been conventionally performed with both hands can be performed with one hand. Furthermore, other work can be performed simultaneously.
[0024]
In addition, simply grasping the blood vessel wall of a conventional graft with a single tweezers causes the stump blood vessel wall to be crushed and stuck together, and the anastomosis opening is closed, so an operation to open the anastomosis opening is necessary. However, when the graft grasper of the present invention is used, the graft stump wall can be sucked in each direction from a plurality of suction ports as in the above example. Because it spreads outward, the anastomosis is not blocked by gripping.
[0025]
In addition, since the graft grasper of the present invention can easily suck and grasp the graft, it can also be operated from a second assistant standing at a position far from the operator during the operation of cardiac bypass surgery. The assistant can only concentrate on helping the anastomosis.
[0026]
Furthermore, if the graft grasper itself of the present invention is fixed to the thoracotomy, it is possible to perform the operation by only the operator and the first assistant, so that the operation is prevented from becoming complicated and the medical economy is improved. The top is also useful.
[0027]
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Of course, the present invention is not limited to the following examples, and it goes without saying that various aspects are possible in detail.
[0028]
【Example】
<Example 1>
As shown in FIGS. 1 and 2, the graft gripper of this example is composed of a single hollow tube without a cut, and a graft gripping ring (3) as a suction gripping portion and a rod-like shape continuously therewith. The handle portion (8) and the grip portion (4) are provided outside the handle portion (8). Accordingly, the entire graft grasper (6) has a bowl shape.
[0029]
As shown in FIG. 2, the graft grip ring (3) is a circular hollow tube in which the tip of the hollow tube is circularly deformed. (5) is provided.
[0030]
When a negative pressure is applied to the graft gripper (6), suction is performed from the suction port (5).
[0031]
As shown in FIG. 3, the graft gripper (6) is used after inserting the graft (2) inside the graft grip ring (3) and then behind the grip portion (4), that is, the graft grip. The outer surface of the graft (2) is adsorbed to the inner wall of the graft gripping ring (3) by applying a negative pressure in the opposite direction to the tip provided with the ring (3) and sucking the graft (2). Grip.
[0032]
【The invention's effect】
As described above in detail, according to the invention of this application, when performing an anastomosis operation of a blood vessel in cardiac bypass surgery, the graft is gently protected and easily grasped with one hand, and the graft anastomosis opening is easily opened and the anastomosis operation is simplified. A graft grasper is provided.
[0033]
Further, the graft grasper of the present invention is effective not only for cardiac bypass but also for anastomosis of the tube tissue, and since it is a simple device, it is useful as a device used for tube tissue anastomosis in various clinical sites.
[Brief description of the drawings]
FIG. 1 is a plan view illustrating an entire graft grasper according to an embodiment of the present invention.
2 is a partial cross-sectional perspective view illustrating in detail a graft gripping ring of the graft gripper in the embodiment of FIG. 1; FIG.
FIG. 3 is a perspective view illustrating a state in which a graft is gripped by the graft gripper in the embodiment of FIGS. 1 and 2;
FIG. 4 is a diagram illustrating a state in which a graft is gripped by conventional tweezers.
[Explanation of symbols]
1 Tweezers 2 Graft 3 Graft Grasp Ring 4 Grip Part 5 Suction Port 6 Graft Grab Device 8 Handle

Claims (2)

A suction gripping unit comprising a circular hollow tube, having a handle portion connected thereto, graft grasper and performing gripping of the graft by suction at suction引把lifting unit. The graft grasping device according to claim 1 , wherein suction ports are provided at a plurality of locations on the inner wall of the suction grasping portion.

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