JP2022012166A - Suture needle and suture with suture needle - Google Patents

Abstract

To provide a surgical needle excellent in impalement property, and a suture with the surgical needle.SOLUTION: A surgical needle according to the present invention has a linear part and a curved part. The length of the linear part is one-quarter to three-quarters of a length from a tip to a base end. An intersection angle is in the range of 90° to 180°.SELECTED DRAWING: Figure 2

Description

Application for application of Article 30, Paragraph 2 of the Patent Law [Facts of disclosure] 1. Date of issue: January 7, 2nd year of Reiwa 2. Publications: Abstracts of the 25th Japanese Society of Plastic Surgery Surgery Techniques, p. 71, Hamamatsu University School of Medicine Plastic Surgery 3. Published by: Kazunobu Hashikawa, Tadashi Nomura, Hiroto Terashi (Plastic Surgery, Kobe University) [Public facts] 1. Date: February 8, 2nd year of Reiwa 2. Meeting name, venue: 25th Japan Society for Plastic Surgery and Surgery Act City Hamamatsu (111-1 Itayamachi, Naka-ku, Hamamatsu-cho, Shizuoka Prefecture) 3. Published by: Kazunobu Hashikawa, Tadashi Nomura, Hiroto Terashi (Plastic Surgery, Kobe University)

The present invention relates to a suture needle having excellent punctureability and a suture with a suture needle.

The suture needle used for suturing blood vessels, organs, etc. has a curved shape determined by the curvature of a circle. When suturing blood vessels, organs, etc., the suture needle held by the needle holder is inserted into the living body (blood vessels, organs, etc.), the suture needle is advanced according to the curved shape of the suture needle, and the suture needle is exposed to the outside of the living body. Later, the suture needle is grasped with a needle holder and pulled out.

At this time, in order to advance the suture needle following the curved shape of the suture needle, the angle of advance of the suture needle is continuously maintained and adjusted according to the curvature of the circle from the insertion of the suture needle to the withdrawal. There is a need to.

In a normal surgical procedure, a doctor (operator) holds a needle holder in his right hand and forceps in his left hand, grasps and operates (rotates) the suture needle with the needle holder, and holds the suture needle with forceps. The operation of re-grasping the suture needle with the needle holder and operating (rotating) again is repeated.

In such a suturing operation, the suturing needle is required to reduce the resistance when passing through a living body and improve the piercing property. In addition, it is required to reduce the burden on doctors (operators). Patent Document 1 discloses a structure of a tip (needle tip portion) of a suture needle for improving punctureability.

Japanese Unexamined Patent Publication No. 2004-305397

However, in the suture needle, not only the structure of the needle tip but also the shape of the entire suture needle affects the suturing operation, so that the shape of the entire suture needle is also an important issue in improving the punctureability. Was there.

In detail, in order to achieve a suture movement with excellent piercing ability, the doctor needs to keep turning the needle holder so that the trajectory is an arc, and the needle is continuously circular from the time when the suture needle is inserted until it is pulled out. It was necessary to operate the suture needle according to the curvature.

For that purpose, the doctor had to change the needle holder frequently and rotate the wrist, which was a heavy burden and required a high-level procedure.

Further, when the suture needle cannot be advanced following the curved shape of the suture needle, an excessive force is applied to the needle and the needle is damaged or the living body is damaged, which has been a problem.

In order to solve the above-mentioned problems, the suture needle according to the present invention has a straight portion and a curved portion, and the length of the straight portion is 1/4 of the length from the tip to the proximal end. It is characterized in that it is 3/4 or less and the intersection angle is 90 ° or more and 180 ° or less.

Further, the suture needle according to the present invention is characterized by having at least a curved portion, and the shape of the curved portion includes a clothoid curve.

Further, the suture needle according to the present invention is characterized in that the clothoid curve increases its curvature from the proximal end to the distal end at a constant rate.

Further, the suture needle according to the present invention is characterized in that the clothoid curve reduces the curvature from the proximal end to the distal end at a constant rate.

Further, in the suture needle according to the present invention, the clothoid curve has a clothoid curve in which the curvature increases at a constant rate from the proximal end to the tip, and a clothoid in which the curvature decreases at a constant rate from the proximal end to the tip. It is characterized by including a curve.

Further, the suture with a suture according to the present invention is characterized in that the suture is attached to the suture.

According to the present invention, it is possible to provide a suture needle having excellent piercing property and a suture with a suture needle.

FIG. 1 is an external view of a suture needle according to the first embodiment of the present invention. FIG. 2 is a side view of the suture needle according to the first embodiment of the present invention. FIG. 3 is a side view of the central axis of the suture needle according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining a suturing operation with a suturing needle according to the first embodiment of the present invention. FIG. 5 is a diagram for explaining a suturing operation using a conventional suturing needle. FIG. 6 is an external view of a suture needle according to a modified example of the first embodiment of the present invention. FIG. 7 is a side view of the suture needle according to the second embodiment of the present invention. FIG. 8 is a side view of the central axis of the suture needle according to the second embodiment of the present invention. FIG. 9 is a diagram for explaining a suturing operation with a suturing needle according to a second embodiment of the present invention. FIG. 10 is a side view of the suture needle according to the third embodiment of the present invention. FIG. 11 is a side view of the central axis of the suture needle according to the third embodiment of the present invention. FIG. 12 is a diagram for explaining a suturing operation with a suturing needle according to a third embodiment of the present invention. FIG. 13 is a side view of the suture needle according to the fourth embodiment of the present invention. FIG. 14 is a side view of the central axis of the suture needle according to the fourth embodiment of the present invention. FIG. 15 is a diagram for explaining a suturing operation with a suturing needle according to a fourth embodiment of the present invention. FIG. 16 is a side view of the central axis of the suture needle according to the modified example of the fourth embodiment of the present invention. FIG. 17 is a side view of the suture needle according to the fifth embodiment of the present invention. FIG. 18 is an external view of a suture with a suture needle according to a sixth embodiment of the present invention.

<First Embodiment>
The suture needle 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

<Structure of suture needle>
1 and 2 are a perspective view and a side view of the suture needle 10 according to the present embodiment, respectively. In the side view, the longitudinal direction of the suture needle 10 is the X direction, and the direction in which the tip of the suture needle 10 is warped is the upward direction (Z positive direction).

In the suture needle 10 according to the present embodiment, the main body 11 is curved, the tip (needle tip) 12 is sharp, and a suture thread (not shown) is attached to the base end 13.

The cross-sectional shape of the main body 11 is not limited, and a circular shape, a polygonal shape such as a triangle, or the like can be applied. Further, the cross-sectional shape may be a shape that changes in the longitudinal direction of the suture needle 10.

The suture needle 10 is made of stainless steel. The material may be, for example, a polymer, an alloy or a material having appropriate rigidity.

The main body 11 has a tapered shape whose diameter decreases toward the tip 12, and has a tapered shape within a range of about 1 mm from the tip.

The base end 13 is a portion to which a suture (not shown) is attached, and is provided with an ammunition hole (spring hole). The tip of the elongated hole is cracked at the tip of the ammunition hole, and the suture is attached to the suture needle 10 by pressing the side surface of the suture into the crack and passing it through the hole. The base end 13 may be provided with a Nami hole (ordinary hole) as well as a bullet hole (spring hole). Alternatively, a blind hole having a predetermined depth is formed on the end surface of the proximal end 13, and a suture is inserted into the blind hole to crimp the peripheral portion of the proximal end 13, so that the suture is attached to the suture needle 10. You may.

FIG. 3 shows an overview view of the central axis when the main body 11 is viewed from the side surface. In the main body 11, a portion having a predetermined length from the base end 13 (P1-P2 in the figure) and a portion having a predetermined length from the tip 12 (P3-P4 in the figure) have a linear shape (hereinafter, “straight line portion””. The curved portion (P2-P3 in the figure, hereinafter referred to as “curved portion”) has a curved shape having a constant circular curvature.

The total length L0 of the suture needle 10 is about 5 mm, the length L1 of the straight line portion is about 2.5 mm, and the length L2 is about 1 mm. Here, the length L1 of the straight line portion is not limited to this, and it is desirable that the length L1 is 1/4 or more and 3/4 or less with respect to the length from the tip end to the base end.

Further, the intersection angle IA of the curved portion is 90 °. Here, the intersection angle IA of the curved portion is not limited to this, and it is desirable that it is 90 ° or more and 180 ° or less.

<Action and effect of suture needle>
The suturing operation using the suturing needle 10 according to the present embodiment will be described with reference to FIG. For comparison, FIG. 5 shows a case where a suture needle (hereinafter referred to as “conventional needle”) 101 having a curved shape determined by the curvature of a conventional circle is used.

As shown in FIG. 5, when the conventional needle 101 is used, first, the conventional needle 101 gripped by the needle holder is inserted into the living body, and the needle holder is rotated greatly (FIG. 5A).

After insertion, the needle holder is turned to advance the needle so that the locus becomes an arc following the curvature of the circle, and even after the conventional needle 101 is exposed to the outside of the living body, the locus becomes an arc following the curvature of the circle. Continue to rotate the needle holder so as to advance and pull out the conventional needle 101 (FIG. 5B-D).

At this time, hold the needle holder in one hand and the forceps in the other hand, grasp and operate (rotate) the suture needle with the needle holder, hold the suture needle with the forceps, and hold the suture needle with the needle holder. The operation of re-grasping and operating (rotating) again is repeated.

In this way, it is necessary to keep turning the needle holder so that the locus becomes an arc, and it is necessary to continuously operate the conventional needle 101 following the curvature of the circle from the time when the conventional needle 101 is inserted until it is pulled out. In other words, it is necessary to advance the conventional needle 101 while adjusting the angle to be constant so as to follow the curvature of the circle.

For that purpose, the doctor needs to frequently change the needle holder and rotate the wrist, which is a heavy burden and requires a high-level procedure.

Further, when the suture needle has only a curved shape (when the linear shape is not included), it is difficult to transmit the force to the tip of the suture needle when suturing, especially when inserting or pulling out the suture needle. As a result, the frequency of attempting to insert or remove the suture needle increases, and it becomes difficult to immediately determine the position of inserting or removing the suture needle. In addition, when the suture needle has only a curved shape (when it does not include a linear shape), it is difficult for the doctor to intuitively grasp the position of inserting or pulling out the suture needle.

On the other hand, when the suture needle 10 according to the present embodiment is used, as shown in FIG. 4, after the suture needle 10 is inserted into the living body, the needle is advanced according to the curvature of the circle (FIGS. 4A-C). .. When pulling out, it may be pulled out linearly (FIG. 4D-E).

Therefore, it is not necessary to continuously operate the suture needle 10 following the curvature of the circle from the time when the suture needle 10 is inserted to the time when the suture needle 10 is pulled out. After inserting the suture needle 10 and then advancing the suture needle 10 into the living body according to the curvature of the circle, the suture needle 10 can be pulled out only by linearly operating the suture needle 10.

Further, when advancing the suture needle according to the curvature of the circle (FIGS. 4A-C), the operation (rotation) of holding the suture needle with a forceps, re-grasping the suture needle with a needle holder, and operating (rotating) again is performed. Although it is necessary, when the suture needle is pulled out linearly (Fig. 4D-E), it is only necessary to hold the suture needle with a forceps and pull it out, and it is not necessary to pick it up and operate (rotate) it by holding it in the needle holder.

In this way, the doctor does not need to change the needle holder frequently, the burden is reduced, and highly accurate suturing can be performed without requiring a high-level procedure.

Further, since the suture needle 10 has a linear shape, the force can be easily transmitted to the tip of the suture needle when the suture needle is inserted or pulled out. As a result, the suture needle can be quickly inserted and removed, so that the position of insertion and extraction can be easily determined. Further, if the suture needle 10 including the linear shape is used, the doctor can intuitively grasp the position of inserting or pulling out the suture needle.

Further, although the suture needle according to the present embodiment has a straight portion on the proximal end side, as shown in FIG. 6, a straight portion may be provided on the distal end side (suture needle 14).

In this case, after the suture needle 14 is inserted and operated linearly, the suture needle 14 is advanced into the living body according to the curvature of the circle and the suture needle 14 is pulled out. As a result, it is not necessary to continuously operate the suture needle 14 following the curvature of the circle from the time when the suture needle 14 is inserted to the time when the suture needle 14 is pulled out.

Further, when the suture needle 14 is operated linearly, it is only necessary to hold the suture needle 14 with forceps and operate it, and it is not necessary to hold the suture needle 14 back to the needle holder and operate (rotate) it. In this way, the doctor does not need to change the needle holder frequently, the burden is reduced, and highly accurate suturing can be performed without requiring a high-level procedure.

Further, since the suture needle 14 includes a linear shape, the doctor can easily determine the position of inserting or pulling out the suture needle, and can intuitively grasp the position, as in the case of the suture needle 10.

Further, the suture needle 14 according to the present embodiment is effective for suturing in a deep surgical field such as an end-side anastomosis of the internal jugular vein. When it is necessary to insert the suture needle linearly in a deep surgical field such as an end-side anastomosis of the internal jugular vein, the suture needle 14 has a straight portion from the tip and can be easily inserted into the deep surgical field. .. As a result, since suturing can be easily performed in a deep surgical field, the suturing time can be shortened as compared with the case of using a conventional needle, and the burden on the doctor can be reduced.

In this embodiment, a circular shape is used as the curved shape, but other curved shapes such as a quadratic function curve may be used.

<Second embodiment>
The suture needle 20 according to the second embodiment of the present invention will be described with reference to FIGS. 7 to 9.

<Structure of suture needle>
FIG. 7 is a side view of the suture needle 20 according to the present embodiment. The suture needle 20 according to the present embodiment has substantially the same configuration as that of the first embodiment, and includes a main body 21, a tip end 22, and a base end 23, but the curved shape of the main body 21 is different.

FIG. 8 shows an overview view of the central axis when the main body 21 is viewed from the side surface. The portion having a predetermined length from the base end 23 (P1-P2 in the figure) is a straight portion, and the curved portion (P2-P3 in the figure) has a constant curvature from the base end 23 side to the tip 22 side. It has a curved shape with an increasing clothoid curve. Here, although the straight portion is provided only on the proximal end side, the linear portion may be provided on the distal end side as well.

The total length L0 of the suture needle 20 is 4.5 mm, and the length L1 of the straight portion is about 1 mm (about 22% with respect to the total length L0). The length L1 of the straight line portion is not limited to this, and it is desirable that the length L1 is ½ or less of the length of the total length L0.

The needle diameter of the suture needle 20 is 100 μm. The needle diameter is in the range of about 1 mm from the tip 22 and becomes smaller toward the tip 22, and the tip 22 is sharp.

<Action and effect of suture needle>
First, the clothoid curve will be described. The clothoid curve is a trajectory drawn when the curvature is changed at a constant rate. When the radius of curvature and the curve length from the starting point are R and L, respectively, the product of both is constant as shown in the following equation.

RL = A2

A is a constant having a dimension of length called a clothoid parameter.

For example, in the case of traveling of an automobile, the clothoid curve is a traveling locus generated when an automobile traveling at a constant speed travels while rotating a steering wheel at a constant angular velocity.

When a car running at a constant speed turns a curve with a constant curvature (consisting of a part of a circle), it becomes a steep steering wheel, a large centrifugal force is generated, and stable running becomes difficult. On the other hand, when turning a curve in which a clothoid curve is used, the steering wheel can be rotated at a constant angular velocity while traveling, so that centrifugal force can be suppressed and stable traveling becomes possible.

In the suture needle 20 according to the present embodiment, the radius of curvature R is 1.6, the curve length L is 5, and the clothoid parameter A is 2.83. The intersection angle IA is 114 °.

The suturing operation using the suturing needle 20 according to the present embodiment will be described with reference to FIG.

First, the suture needle 20 gripped by the needle holder is inserted into the living body (FIG. 9A).

After insertion, the rotation of the needle holder is gradually reduced to advance the needle according to the clothoid curve (FIG. 9B-C). After the suture needle 20 is exposed to the outside of the living body, the needle is linearly advanced and pulled out (FIG. 9D-E).

In this way, after the suture needle 20 is inserted into the living body, the rotation of the needle holder is gradually reduced according to the clothoid curve to advance the needle, but when the needle is pulled out, it may be pulled out linearly.

Therefore, unlike the conventional suture needle, it is not necessary to continuously operate the suture needle 20 following the curvature of the circle from the time when the suture needle 20 is inserted to the time when the suture needle 20 is pulled out. After inserting the suture needle 20 and then gradually reducing the rotation of the needle holder according to the crossoid curve to advance the suture needle 20 into the living body, the suture needle 20 can be pulled out only by operating linearly.

When suturing with a conventional needle, if the conventional needle has a constant curvature of a circle and a semicircular curved shape (1/2 · R), one rotation operation is 180 °. The rotation rate is 0.5 for the rotation motion (360 °) required for one suture.

On the other hand, when the suture needle 20 of the present embodiment is used, the rotation rate is 0.316 because one rotation operation is 114 °. The lower the value of the rotation rate, the smaller the return (movement) of the doctor's wrist in the suturing motion and the smaller the burden. Therefore, the suturing needle 20 of the present embodiment stabilizes the suturing motion and bears the burden on the doctor. It turns out that it reduces.

Further, since the clothoid curve is used for the curved portion, the angle of the suture needle 20 with respect to the traveling direction may be changed at a constant angular velocity when switching from the operation of bending in the traveling direction to the linear operation.

In the suturing operation using the suturing needle 10 according to the first embodiment, when shifting from the curved portion to the straight portion, the same as the above-mentioned steep steering wheel when turning a curve having a constant curvature in the running of a vehicle. Due to the situation, a large centrifugal force is generated, which makes stable suturing operation difficult.

Further, as the centrifugal force increases, the frictional resistance between the suture needle 10 and the living tissue increases, so that the suture needle may be damaged or the living body may be damaged.

On the other hand, in the suturing operation using the suture needle 20 according to the present embodiment, the suture needle 20 is used when shifting from the curved portion to the straight portion, as in the case of turning the curve of the clothoid curve in the running of the vehicle described above. Since suturing can be performed while rotating at a constant angular speed, centrifugal force can be suppressed and stable suturing operation becomes possible.

Further, since the centrifugal force can be suppressed, the frictional resistance between the suture needle and the living tissue, that is, the resistance when piercing a tissue such as a human body (penetration resistance) can be reduced, and the piercing property is improved. As a result, it is possible to avoid damage to the suture needle or damage to the living body.

As described above, in the suturing operation using the suturing needle 20 according to the present embodiment, since it is not necessary to suddenly bend the traveling direction, the centrifugal force can be suppressed, the punctureability is improved, and the suturing is easily and stably. can. As a result, the doctor does not have to change the needle holder frequently, which reduces the burden and fatigue, and enables highly accurate suturing without the need for advanced procedures.

Since the suture needle 20 according to the present embodiment has a shape having a straight portion and a curved portion like the suture needle 10 according to the first embodiment, naturally, the suture needle 10 according to the first embodiment. It also has the same effect as.

<Third embodiment>
The suture needle 30 according to the third embodiment of the present invention will be described with reference to FIGS. 10 to 12.

<Structure of suture needle>
FIG. 10 is a side view of the suture needle 30 according to the present embodiment. The suture needle 30 according to the present embodiment has substantially the same configuration as that of the first and second embodiments, and includes a main body 31, a tip end 32, and a base end 33, but the curved shape of the main body 31 is different. ..

FIG. 11 shows an overview view of the central axis when the main body 31 is viewed from the side surface. The main body 31 has a straight portion (P2-P3 in the figure) having a predetermined length from the tip 32, and the curved portion (P1-P2 in the figure) has a constant curvature from the base end 33 side to the tip 32 side. It has a curved shape with a clothoid curve that decreases at a rate. Here, although the straight portion is provided only on the distal end side, a straight portion may be provided on the proximal end side as well.

The total length L0 of the suture needle 30 is 4.5 mm, and the length L1 of the straight portion is about 1 mm (about 22% with respect to the total length L0). The length L1 of the straight line portion is not limited to this, and it is desirable that the length L1 is ½ or less of the length of the total length L0.

In the suture needle 30 according to the present embodiment, the radius of curvature R is 1.6, the curve length L is 5, and the clothoid parameter A is 2.83. The intersection angle IA is 117 °.

The needle diameter of the suture needle 30 is 100 μm. The needle diameter is in the range of about 1 mm from the tip 32, and becomes smaller toward the tip 32, and the tip 32 is sharp.

<Action and effect of suture needle>
The suturing operation using the suturing needle 30 will be described with reference to FIG.

First, the suture needle 30 gripped by the needle holder is linearly inserted into the living body (FIGS. 12A-B). At this time, there is no rotational movement of the needle holder as in the case of using a straight needle.

After insertion, the rotation of the needle holder is gradually increased according to the clothoid curve, and the needle is advanced and pulled out (FIG. 12C-E).

In this way, it is not necessary to rotate the needle holder at the time of insertion, and after that, the rotation of the needle holder is gradually increased and pulled out.

Therefore, unlike the conventional suture needle 30, it is not necessary to continuously operate the suture needle 30 following the curvature of the circle from the time when the suture needle 30 is inserted to the time when the suture needle 30 is pulled out. After the suture needle 30 is inserted linearly, the rotation of the needle holder is gradually increased according to the clothoid curve, and the suture needle 30 can be advanced and pulled out in the living body.

When the suture needle 30 of the present embodiment is used, the rotation rate is 0.325 because one rotation operation is 117 °. The lower the value of the rotation rate, the less the doctor's wrist return (movement) in the suturing motion and the smaller the burden. Therefore, the suture needle 20 of the present embodiment is sutured as compared with the conventional needle (rotation rate: 0.5). It can be seen that the movement is stabilized and the burden on the doctor is reduced.

Further, since the clothoid curve is used for the curved portion, when switching from the linear operation to the operation of bending the traveling direction, the angle of the suture needle 30 with respect to the traveling direction may be changed at a constant angular velocity.

As described above, in the suturing operation using the suturing needle 30 according to the present embodiment, as in the second embodiment, when shifting from the curved portion to the straight portion, the clothoid curve in the running of the vehicle described above Since the suture needle 30 can be sutured while rotating at a constant angular velocity as in the case of turning a curve, centrifugal force can be suppressed and stable suturing operation becomes possible.

Further, since the centrifugal force can be suppressed, the frictional resistance between the suture needle and the living tissue, that is, the resistance when piercing a tissue such as a human body (penetration resistance) can be reduced, and the piercing property is improved. As a result, it is possible to avoid damage to the suture needle or damage to the living body.

As described above, in the suturing operation using the suturing needle 30 according to the present embodiment, since it is not necessary to suddenly bend the traveling direction, the centrifugal force can be suppressed, the punctureability is improved, and the suturing is easily and stably. can. As a result, the doctor does not have to change the needle holder frequently, which reduces the burden and fatigue, and enables highly accurate suturing without the need for advanced procedures.

Further, the suture needle 30 according to the present embodiment is effective for suturing in a deep surgical field such as an end-side anastomosis of the internal jugular vein. When it is necessary to insert the suture needle linearly in a deep surgical field such as an end-side anastomosis of the internal jugular vein, the suture needle 30 has a straight portion from the tip and can be easily inserted into the deep surgical field. .. As a result, since suturing can be easily performed in a deep surgical field, the suturing time can be shortened as compared with the case of using a conventional needle, and the burden on the doctor can be reduced.

Since the suture needle 30 according to the present embodiment has a shape having a straight portion and a curved portion like the suture needle 14 according to the first embodiment, naturally, the suture needle 14 according to the first embodiment. It also has the same effect as.

<Fourth Embodiment>
The suture needle 40 according to the fourth embodiment of the present invention will be described with reference to FIGS. 13 to 15.

<Structure of suture needle>
FIG. 13 is a side view of the suture needle 40 according to the present embodiment. The suture needle 40 according to the present embodiment has substantially the same configuration as that of the first to third embodiments, and includes a main body 41, a tip end 42, and a base end 43, but the curved shape of the main body 41 is different.

FIG. 14 shows an overview view of the central axis when the main body 41 is viewed from the side surface. In the main body 41, a portion having a predetermined length from the base end 43 (P1-P2 in the figure) and a portion having a predetermined length from the tip 42 (P3-P4 in the figure) are straight portions, and a curved portion (P2 in the figure). -P3) is used in combination with a clothoid curve in which the curvature increases at a constant rate toward the tip 42 and a clothoid curve in which the curvature decreases at a constant rate toward the tip 42.

The total length L0 of the suture needle 30 is 4.5 mm, the length L1 of the straight line portion is 1.0 mm, and the length L2 is about 1.0 mm. The lengths L1 and L2 of the straight line portion are not limited to this, and it is desirable that the total length of the straight line portion is ½ or less of the length of the total length L0.

<Action and effect of suture needle>
The suturing operation using the suturing needle 40 will be described with reference to FIG.

First, the suture needle 40 gripped by the needle holder is linearly inserted into the living body (FIG. 15A). At this time, there is no rotational movement of the needle holder as in the case of using a straight needle.

After insertion, the rotation of the needle holder is gradually increased according to the clothoid curve to advance the needle (FIG. 15B-C).

Next, the rotation of the needle holder may be gradually reduced according to the clothoid curve, the needle may be advanced, and the needle may be pulled out linearly (FIG. 15D-E).

In this way, it is not necessary to rotate the needle holder at the time of insertion, and after that, the rotation of the needle holder is gradually increased or decreased, and then the needle holder is pulled out linearly.

Therefore, unlike the conventional suture needle 40, it is not necessary to continuously operate the suture needle 40 following the curvature of the circle from the time when the suture needle 40 is inserted to the time when the suture needle 40 is pulled out. After the suture needle 40 is inserted linearly, the rotation of the needle holder is gradually increased or decreased according to the clothoid curve, and the suture needle 40 can be advanced into the living body and pulled out linearly.

Furthermore, since a clothoid curve is used for the curved portion, if the angle of the suture needle 40 with respect to the traveling direction is increased or decreased at a constant angular velocity when switching from a linear operation to an operation of bending the traveling direction and further to a linear operation. good.

As described above, in the suturing operation using the suture needle 40 according to the present embodiment, the suture needle 40 has a constant angular velocity when shifting from the curved portion to the straight portion, as in the second to third embodiments. Since it is possible to suture while rotating with, centrifugal force can be suppressed and stable suturing operation becomes possible.

Further, since the centrifugal force can be suppressed, the frictional resistance between the suture needle 40 and the living tissue, that is, the resistance when piercing a tissue such as a human body (penetration resistance) can be reduced, and the piercing property is improved. As a result, it is possible to avoid damage to the suture needle 40 or damage to the living body.

As described above, in the suturing operation using the suturing needle 40 according to the present embodiment, since it is not necessary to suddenly bend the traveling direction, the centrifugal force can be suppressed, the punctureability is improved, and the suturing is easily and stably. can. As a result, the doctor does not have to change the needle holder frequently, which reduces the burden and fatigue, and enables highly accurate suturing without the need for advanced procedures.

Since the suture needle 40 according to the present embodiment has a shape having a straight portion and a curved portion like the suture needles 10 and 14 according to the first embodiment, naturally, the suture according to the first embodiment It also has the same effect as the needles 10 and 14.

In the present embodiment, the configuration of the curved portion is a clothoid curve in which the curvature increases at a constant rate toward the tip on the proximal end side, and a clothoid curve in which the curvature decreases at a constant rate toward the tip on the distal end side. Although used in combination, as shown in FIG. 16, a curve (arc) having a constant curvature may be arranged between the two clothoid curves.

<Fifth Embodiment>
The suture needle 50 according to the fifth embodiment of the present invention will be described with reference to FIG.

<Structure of suture needle>
FIG. 17 is a side view of the suture needle 50 according to the present embodiment. The suture needle 40 according to the present embodiment has substantially the same configuration as that of the first to fourth embodiments, and includes a main body 51, a tip 52, and a base end 53, but does not have a straight portion and is a main body. 51 is composed of only a curved portion.

The curved portion of the main body 51 has a curved shape of a clothoid curve, as in the second and third embodiments. The clothoid curve may have a shape in which the curvature increases at a constant rate from the base end 53 side to the tip end 52 side, or a shape in which the curvature decreases at a constant rate from the base end 53 side to the tip end 52 side.

Here, an example in which the main body 51 has a curved shape is shown, but the range of about 1 mm from the tip 52 may be a straight line shape.

Since the suture needle 50 according to the present embodiment has a curved shape of the crossoid curve as in the second and third embodiments, the suture operation using the suture needle 50 is different from the second and third embodiments. Similarly, since the suture needle 30 can be sutured while rotating at a constant angular speed, centrifugal force can be suppressed and stable suturing operation becomes possible.

In this way, the doctor does not need to change the needle holder frequently, the burden and fatigue are reduced, and highly accurate suturing can be performed without the need for advanced procedures.

Further, since the centrifugal force can be suppressed, the frictional resistance between the suture needle and the living tissue, that is, the resistance when piercing a tissue such as a human body (penetration resistance) can be reduced, and the piercing property is improved. As a result, it is possible to avoid damage to the suture needle or damage to the living body.

<Sixth Embodiment>
The suture thread 60 with a suture needle according to the sixth embodiment of the present invention will be described with reference to FIG.

<Structure of suture needle>
FIG. 18 shows a perspective view of the suture thread 60 with a suture needle according to the present embodiment. The suture thread 60 with a suture needle according to the present embodiment includes the suture needle 20 and the suture thread 61 according to the second embodiment.

The suture needle 20 includes a main body 21, a tip 22 and a proximal end 23. The suture thread 61 is inserted into a blind hole provided in the proximal end 23, and is attached to the suture needle 20 by caulking the periphery of the proximal end 23. The suture thread 61 may be attached to the suture needle 20 by heat treatment, an adhesive, or the like.

The material of the suture 61 is nylon, which is a monofilament (single thread), and has a diameter of 0.05 mm. The material of the suture thread 51 is not limited to this, and may be polyester, silk, or a blade (knitting thread). The diameter may be 0.001 mm to 0.8 mm.

The suture thread 60 with a suture needle according to the present embodiment has the same effect as that described in the second embodiment, and it is not necessary to sharply bend the traveling direction in the suturing operation, so that the centrifugal force is suppressed. It can be pierced, and it can be easily and stably sutured. As a result, the doctor does not have to change the needle holder frequently, which reduces the burden and fatigue, and enables highly accurate suturing without the need for advanced procedures.

In the present embodiment, the same effect can be obtained by using the suture needles 30, 40, and 50 according to the third to fifth embodiments as the suture needle. Further, the suture needle 10 according to the first embodiment may be used, and the doctor does not need to frequently change the needle holder, the burden is reduced, and the suture can be performed with high accuracy.

In the suture needle according to the embodiment of the present invention, the suture needle has a round needle having a conical tip and a triangular needle having a triangular pyramid tip (the inside of the curve is sharp) and the tip of the square needle has a triangular cone shape (outside the curve). It may be an inverted triangular needle (which is sharp), a tapered cut needle whose entire needle is columnar and has a triangular cone shape only at the tip, or a blunt needle which is a round needle whose tip is slightly rounded and blunted. .. Further, the tip may be an inverted needle having an inverted triangular cross section or a spatula type in which the tip (apex) of the inverted needle is removed.

In the embodiment of the present invention, the length of the suture needle is 4.5 mm or 5 mm, and the needle diameter is 100 μm, but the present invention is not limited to this. The length of the suture needle can be in the range of 1 mm to 100 mm, and the needle diameter can be in the range of 50 μm to 1.5 mm. In particular, for microsurgery such as brain surgery, 3 mm to 7 mm and a needle diameter of 50 μm to 250 μm are desirable. The length of the suture needle is preferably 9 mm to 24 mm for vascular suture, 10 mm to 70 mm for surgical operation, and 9 mm to 25 mm for plastic surgery.

The crossing angle of the clothoid curve of the suture needle in the embodiment of the present invention is 114 ° to 117 °, but the angle is not limited to this, and 110 ° or more and 134 ° or less is desirable. Further, the intersection angle of the curved portion is preferably 90 ° or more and 180 ° or less.

It is manufactured by the usual manufacturing method of the suture needle in the embodiment of the present invention. For example, after cutting a stainless steel material to a predetermined length, a hole for suture is formed. Next, the tip and the main body (body) are processed including the formation of a curved portion, and sterilization is performed after the polishing treatment.

In the embodiment of the present invention, examples of the structure, dimensions, materials, etc. of each component in the configuration, manufacturing method, and the like of the suture needle and the suture with the suture needle are shown, but the present invention is not limited to this. Any suture needle and suture thread with a suture needle may be functional and effective.

INDUSTRIAL APPLICABILITY The present invention has industrial applicability as a medical device used for surgical operations such as brain surgery and gastrointestinal surgery and plastic surgery.

10, 20, 30, 40, 50 Suture needle 11, 21, 31, 41, 51 Main body 12, 22, 32, 42, 52 Tip 13, 23, 33, 43, 53 Base end 60 Suture with suture needle 61 Suture Thread 101 Conventional needle (conventional suture needle)

Claims (6)

It has a straight part and a curved part,
The length of the straight portion is 1/4 or more and 3/4 or less with respect to the length from the base end to the tip end.
A suture needle with an intersection angle of 90 ° or more and 180 ° or less. Has at least a bend,
A suture needle in which the shape of the curved portion includes a clothoid curve. The suture needle according to claim 2, wherein the clothoid curve increases the curvature from the proximal end to the distal end at a constant rate. The suture needle according to claim 2, wherein the clothoid curve reduces the curvature from the proximal end to the distal end at a constant rate. A claim characterized in that the clothoid curve includes a clothoid curve in which the curvature increases at a constant rate from the proximal end to the tip, and a clothoid curve in which the curvature decreases at a constant rate from the proximal end to the tip. Item 2. The suture needle according to Item 2. A suture with a suture needle in which the suture needle according to any one of claims 1 to 5 is attached to the suture.

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