JP2001340349A - Surgical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surgical instrument that can perform a series of operations ranging from coagulation to incision, can incise well tissue and is easy to operate. SOLUTION: In a surgical instrument having a pair of gripping portions 7 and 8 gripping biological tissue at the tip of the insertion portion, and opening and closing the gripping portions 7 and 8 in accordance with the opening and closing of a proximal operating portion, a ceramic heater 22 in which a heater 23 as a heat generating portion is provided in at least one of the gripping portions 7 and 8 and the tissue contacting face of the ceramic heater 22 is formed into a circular arc in cross section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical instrument for incising a coagulated part after a living tissue is coagulated by heating.

[0002]

2. Description of the Related Art Generally, a surgical instrument is known as a medical treatment tool which heats and coagulates a living tissue such as a blood vessel, and then incises the coagulated portion. For example, USP
No. 5,792,137 shows a heating means as a means for heating a living tissue, which utilizes the fact that the semiconductor generates heat due to electric resistance when the semiconductor is energized.

Japanese Patent Application Laid-Open No. 11-137563 discloses a bipolar forceps having a pair of jaws, and the pair of jaws is provided with scissors for incising tissue and a grip for gripping tissue.

Japanese Patent Laid-Open Publication No. Hei 8-505801 discloses a blade having an ultrasonic vibrator, which vibrates in the front-rear direction by the ultrasonic vibrator at the tip, and the vibration of the blade moves substantially vertically. It comprises a clamp, and is configured to hold the tissue by the blade and the clamp, coagulate, and then incise.

In US Pat. No. 5,716,366, a pair of jaws for grasping tissue are provided with a heating element at the tip, and a cutting element is provided on one of the jaws so as to be able to advance and retreat. It is like that.

[0006]

By the way, USP 5,
When a semiconductor is used as the heater means as in 792 and 137, it is necessary to cover the outside of the semiconductor with an insulator so as to prevent current from leaking to a living tissue when the semiconductor is energized and to insulate the semiconductor.

However, a synthetic resin or a ceramic material is usually used as the insulator. However, these materials have a low thermal conductivity and are not suitable for use as a heater.

Accordingly, Teflon (registered trademark) is used as a metal material.
In some cases, the insulation coating may be used, but in this case, if the coating is damaged due to scratches during use and the insulation is destroyed, it immediately becomes unusable, and there is a problem in durability and reliability.

In Japanese Patent Application Laid-Open No. H11-137563, scissors for cutting tissue and a grip for gripping tissue are separately provided. Therefore, after the jaws are closed and the tissue is gripped and coagulated, the jaws are removed. Once opened, the scissors portion is applied to the solidified portion, and a cumbersome operation of closing again is required.

[0010] Japanese Patent Publication No. Hei 8-505801 discloses that the tissue is coagulated by ultrasonic vibration, and is structurally complicated and heavy, which imposes a burden on the operator.

US Pat. No. 5,716,366 has a complicated structure and a complicated operation since a member for coagulating tissue and a member for incision are separate.

The present invention has been made in view of the above-mentioned circumstances, and has as its object the simple structure allows incision from coagulation to incision by a series of operations, and excellent tissue incision and operability. To provide surgical instruments.

[0013]

According to the present invention, in order to achieve the above-mentioned object, a first aspect of the present invention has a pair of gripping portions for gripping a living tissue at a distal end portion, and the opening and closing operation of a hand operating portion is performed. In the surgical instrument for opening and closing the grip, at least one of the grips has a heat generating portion, and a tissue contact surface of the heat generating portion is formed in an arc-shaped cross section.

According to a second aspect of the present invention, there is provided a surgical instrument having a pair of grasping portions at its distal end for grasping a living tissue, and opening and closing the grasping portions in accordance with opening and closing operations of a hand operating portion. It has a heat generating part, and the tissue contact surface of the heat generating part is smaller in area than the tissue contacting surface of the opposing gripping part.

According to the above configuration, the contact surface of one of the gripping portions with the living tissue is formed by, for example, a cylindrical ceramic heater, so that it comes into substantially line contact with the living tissue, and is excellent in incision. The incision can be performed with a small gripping force of the pair of gripping portions. Therefore, the incision can be performed by a series of operations from coagulation to incision, and a thermocoagulation incision forceps excellent in tissue incision can be provided.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show a first embodiment, and FIG.
2 is an overall configuration diagram of the surgical instrument, FIG. 2 is a side view of the surgical instrument, FIG. 3 is a perspective view of the grip portion, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, and FIG. FIG. 6 is a graph.

As shown in FIG. 1, a thermocoagulating incision forceps 1 as a surgical instrument is connected to a power supply 3 via a cable 2, and a foot switch 4 is connected to the power supply 3.

As shown in FIGS. 2 to 4, the thermocoagulating incision forceps 1 is provided at a hand operation section 5, an insertion section 6 provided at the hand operation section 5, and a distal end of the insertion section 6. And a pair of first and second gripping portions 7 and 8.

The hand operation unit 5 includes an operation unit main body 12, a fixed handle 9 provided integrally with the operation unit main body 12, and a movable unit rotatably provided on the operation unit main body 12 with a pivot 10 as a fulcrum. And a handle 11. The insertion portion 6 is provided on the operation portion main body 12 so as to be rotatable about an axis by a rotation operation portion 13.

The insertion portion 6 is formed by a small-diameter pipe,
A drive shaft 14 that can move back and forth in the axial direction is provided inside the insertion portion 6.
Is interpolated. The proximal end of the drive shaft 14 is connected to the movable handle 11, and the first and second grips 7, 8 are provided at the distal end. The first and second grips 7 and 8 can be opened and closed with the pivot pin 15 as a fulcrum. When the movable handle 11 is rotated in the direction a, the drive shaft 14 is retracted and closed, and when the drive shaft 14 is rotated in the direction b. , The drive shaft 14 moves forward and opens.

The operation section main body 12 is provided with a connector connection section 16a, and the connector 16 of the cable 2 is detachably connected to the connector connection section 16a. Electrical contact 1 of connector connection part 16a
6b is electrically connected to a heater 23 of a ceramic heater 22, which will be described later, provided on the second grip 8 along the drive shaft 14.

Next, the first and second gripping portions 7 and 8 will be described. The first gripping portion 7 is wide, has a concave portion 17 opening toward the lower surface, and has a downward U-shaped cross section. Is formed. A serrated anti-slip portion 18 is provided on the lower surface on both sides with the concave portion 17 interposed therebetween.
Is embedded with a heat insulating material 19 made of a flexible member such as Teflon.

The second holding portion 8 has an arc-shaped groove 21 formed on the upper surface of the heater holding portion 20 having a rectangular cross section narrower than the concave portion 17, and the arc-shaped groove 21 has a cylindrical ceramic as a heat generating portion. The heater 22 is fixed. A heater 23 as a heating resistor is buried inside the ceramic heater 22. Furthermore, the outer surfaces of the first and second grips 7, 8 are Teflon coated to prevent scorching to the tissue.

FIG. 5 shows an electric circuit of the power supply device 3. A power supply circuit 24 connected to a commercial power supply is connected to the cable 2 via an output circuit 25. The output circuit 25 is connected to a control circuit 26 connected to the foot switch 4 and the control circuit 2
Reference numeral 6 is connected to setting means 27 for setting the temperature, time, and the like.

FIG. 6 shows the temperatures at the time of incision, coagulation and coagulation incision.
The horizontal axis indicates time t (seconds), and the vertical axis indicates temperature T.
(° C.). The setting means 27, as shown by the curve
At the time of incision,₁Raise the temperature rapidly until
At the time of solidification, as shown by the curve,₂
Setting to raise the temperature to and maintain for several seconds and coagulation incision
Time is gradually T₂After raising the temperature to
As shown, the temperature is T ₁So that it rises sharply
Can be set.

Next, an operation of coagulating and incising a coagulated incision site of a living tissue by the thermocoagulated incision forceps 1 configured as described above will be described.

When the surgeon grips the hand operation unit 5 and turns the movable handle 11 in the direction of arrow b with respect to the fixed handle 9, the drive shaft 14 moves forward and the first and second grips 7, 8 are moved. Opens. In this state, when the thermocoagulating incision forceps 1 is advanced to rotate the movable handle 11 in the direction of arrow a with the coagulating incision portion of the living tissue interposed between the first and second gripping portions 7 and 8. , The drive shaft 14 is retracted and the first and second grip portions 7,
8 closes.

Then, the coagulated incision site of the living tissue is gripped in a state where the coagulated incision is pressed with a relatively small and appropriate pressing force suitable for coagulation treatment. When the foot switch 4 is turned on by operating the foot switch 4 in this state, power is supplied to the thermocoagulative forceps 1 from the power supply device 3 via the cord 2. Therefore, the setting means 27 is provided to the heater 23 of the ceramic heater 22 provided in the second gripper 8.
The current set in accordance with the above is supplied, and the heater 23 generates heat.

As shown in the curve in FIG. 6 by the heat generation of the heater 23, to maintain a few seconds to raise the temperature gradually to T _2, the coagulation incision of the living tissue is coagulated.
At this time, since the tissue contact surface of the first grip 7 is the heat insulating material 19, the heat of the ceramic heater 22 is reduced by the first grip 7.
Never escape to the side.

[0031] Subsequently, the heater 23 is energized current set by the setting means 17, as shown in the curve of FIG. 6, with rises rapidly the temperature to T _1, further direction of arrow a movable handle 11 Then, the drive shaft 14 is retracted, and the first and second grips 7 and 8 are further closed, so that the coagulation / incision site of the living tissue can be incised.

At this time, since the contact surface of the second gripper 8 with the living tissue is formed by the cylindrical ceramic heater 22, it comes into substantially line contact with the living tissue, and is excellent in incision. The incision can be made with a small gripping force of the first and second gripping parts 7 and 8. Therefore, the incision can be performed by a series of operations from coagulation to incision, and a thermocoagulation incision forceps excellent in tissue incision can be provided.

FIGS. 7A to 7D show the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. 3A, a cylindrical ceramic heater 31 is provided in the concave portion 17 of the first holding portion 7, and a heater 32 as a heating resistor is buried inside the ceramic heater 31, and the first and second holding portions are provided. The heat energy is applied to both of 7 and 8.

3 (b), a rectangular ceramic heater 33 is provided in the concave portion 17 of the first holding portion 7, and a heater 34 as a heating resistor is buried inside the ceramic heater 33. The thermal energy is applied to both of the grip portions 7 and 8.

3C, a narrow rectangular heater holding portion 35 is provided in the first holding portion 7, and a cylindrical ceramic heater 37 is provided in an arc groove 36 of the heater holding portion 35. A heater 38 as a heating resistor is buried inside, and heat energy is applied to both the first and second grips 7 and 8.

FIG. 4D shows the heater holding section 2 of the second holding section 8.
A ceramic heater 39 having a narrow rectangular shape is provided at 0, and a heater 40 as a heating resistor is buried inside the ceramic heater 39 to improve incision. The tip of the ceramic heater 39 of the second gripper 8 shown in (d) is chamfered as shown in (e) or (f).
As shown in FIG.

According to the present embodiment, similarly to the first embodiment, the living tissue is substantially in line contact with the living tissue, the incision is excellent, and the light grasping force of the first and second grasping portions 7 and 8 is small. Can be incised. Therefore, the incision can be performed by a series of operations from coagulation to incision, and a thermocoagulation incision forceps excellent in tissue incision can be provided.

FIG. 8 shows a third embodiment, and is a perspective view of a scissors-type thermocoagulating incision forceps 41 of the present embodiment. The body 42 of the thermocoagulating incision forceps 41 has two scissors constituting members 43 and 44.
Is provided. These scissors constituting members 43 and 44 are overlapped so that the middle portions substantially intersect. Further, at the intersection of both scissors component members 43, 44, both scissors component members 43, 44 are provided.
A fulcrum pin 45 for rotatably connecting the rotator 44 is provided.

A pair of jaws 46, 4 as openable / closable grippers for gripping a living tissue are provided at the distal end of the main body 42.
7 is provided. Further, the ratchet 49a, 5
The finger insertion rings 49 and 50 having a substantially elliptical shape and having 0a are formed. And these finger insertion rings 4
A hand operation portion 51 for opening and closing the pair of jaws 46 and 47 is formed by the portions 9 and 50.

The treatment section 48 of the main body 2 is formed with a curved portion 52 that is gently curved in a substantially arc shape. further,
On the inner surface of one jaw 47, a serrated anti-slip portion 47a is provided.
And a cylindrical ceramic heater 46a in which a heater for coagulating the living tissue is embedded on the inner surface of the other jaw 46, that is, on the contact surface side with the living tissue. The ceramic heater 46a is connected to a connector 53 via a scissors constituting member 43, and a cable 54 connected to a power supply device (not shown) is connected to the connector 53.

Next, the operation of the thermocoagulated incision forceps 41 configured as described above will be described. First, in a state where the treatment section 48 at the distal end of the main body 42 is closed, the treatment section 48 is inserted into a living tissue including a treatment target such as a blood vessel (not shown). Thereafter, by opening the pair of jaws 46 and 47, the treatment target portion such as a blood vessel is peeled off from other living tissue and exposed.

Subsequently, the separated blood vessels and the like are each
It is gripped in a state where it is compressed with a relatively small appropriate pressing force suitable for the coagulation treatment between 47. In this state, when a power supply device (not shown) is output, each jaw 47
A current shown in FIG. 6 is applied to the heater of the ceramic heater 46a. The ceramic heater 46a generates heat due to the electric resistance at the time of energization, and the living tissue of the treatment target such as a blood vessel in contact with the surface of the ceramic heater 46a is coagulated. Subsequently, when cutting the coagulated portion, a current shown in FIG. 6 is supplied to the heater of the ceramic heater 46 a of each jaw 46 via the cable 54. In this state, when the jaws 46 and 47 are further closed, a coagulated portion of the living tissue is cut.

According to the present embodiment, similarly to the first embodiment, the living tissue is brought into substantially line contact with the living tissue, the incision is excellent, and the jaws 46 and 47 can be incised with a small gripping force. . Therefore, the incision can be performed by a series of operations from coagulation to incision, and a thermocoagulation incision forceps excellent in tissue incision can be provided.

FIG. 9 shows a fourth embodiment, wherein (a) is a side view of the entire scissors-type coagulation treatment tool, (b) is a plan view of the treatment section, and (c) is a perspective view of a jaw. . The body 62 of the coagulation treatment tool 61 of the present embodiment has two scissor constituent members 63 and 64.
Is provided. These scissors constituting members 63 and 64 are superimposed such that the middle portions substantially intersect. Furthermore, at the intersection of both scissors component 63, 64, both scissors component 63, 64
A fulcrum pin 65 for rotatably connecting the support pins 64 is provided.

A treatment section 68 having a pair of openable and closable jaws 66 and 67 for grasping a living tissue is provided at the distal end of the main body 62. A substantially oval finger insertion ring 69, 70 is formed at the base end of each of the scissors constituting members 63, 64. And these finger insertion rings 69, 7
A hand operating portion 71 for opening and closing the pair of jaws 66 and 67 is formed by the portion 0.

The treatment section 68 of the main body 62 is formed with a curved portion 72 which is gently curved in a substantially arc shape as shown in FIG. Further, a ceramic heater 7 having a rectangular shape for coagulating the living tissue on the contact surface side with the living tissue behind the jaws 66 and 67 and having a wide contact surface with the living tissue is provided.
3, 74 are provided.

Each of the ceramic heaters 73 and 74 is formed by embedding a heater inside a ceramic which is an insulator. The outer surfaces (contact surfaces with the living tissue) of the ceramic heaters 73 and 74 are coated with Teflon to prevent scorching (sticking) of the living tissue.

Further, grip portions 75 and 76 for gripping a living tissue are provided on the forward sides of the jaws 66 and 67, respectively. As shown in (c), the grip portions 75 and 76 are provided with serrated non-slip portions 75a and 76a.

Also, as shown in FIG.
Insulated lead wires 77 and 78 are provided at 3 and 64, respectively. Here, the tip of the insulated lead wire 77 on one scissor component 63 is connected to the ceramic heater 73, and the tip of the insulated lead wire 78 on the other scissor component 64 is connected to the ceramic heater 74.

One cord connecting portion 79 is provided on the outer peripheral surface of the finger insertion ring 69 on the scissors constituting member 63 side, and one cord connecting portion 80 is similarly provided on the outer peripheral surface of the finger inserting ring 70 on the scissor constituting member 64 side. Are protruded from each other. And
The base end of the insulated lead 77 is connected to the cord connecting portion 79 on the scissors component 63 side, and the insulating lead 78 is connected to the cord connecting portion 80 on the scissors component 64 side.
Further, the other ends of the connection cords 81 and 82 whose one ends are connected to a power supply (not shown) are detachably connected to the cord connection parts 79 and 80. Then, power is supplied to the ceramic heaters 73 and 74 from a power supply device (not shown).

Next, the operation of the coagulation treatment instrument configured as described above will be described. First, the treatment unit 68 at the distal end of the coagulation treatment tool 61 is inserted into a living tissue including a treatment target such as a blood vessel (not shown) in a closed state. Thereafter, by opening the pair of jaws 66, 67, the treatment target portion such as a blood vessel is peeled off from another living tissue and exposed.

Subsequently, the detached blood vessels and the like can be grasped by the grasping portions 75 and 86 in front of the treatment section 68 and pulled out to the near side, and the jaws 66 and 6 of the coagulation treatment instrument 61 can be pulled out.
7 is pressed and held between the ceramic heaters 73 and 74 at a pressure appropriate for coagulation treatment. In this state, when a power supply (not shown) is output, power is supplied to the ceramic heaters 73 and 74 of the jaws 66 and 67 via the connection cords 81 and 82. The heater generates heat due to the electric resistance at the time of energization, and coagulates the living tissue of the treatment target such as a blood vessel in contact with the surface. At that time, the ceramic heater 7
Since the reference numerals 3 and 74 are insulators, the current flowing through the heater does not leak into the living tissue of the treatment target.

Therefore, in the present embodiment, the ceramic heaters 73 and 74 are disposed on the jaws 66 and 67 of the main body 62, respectively. Therefore, the ceramic heaters 73 and 74 of the jaws 66 and 67 are insulative because the ceramic heaters 73 and 74 that come into direct contact with the living tissue of the treatment target such as blood vessels are insulators.
It is not necessary to apply another insulating coating to the
1 has the effect of improving the durability and reliability.

FIGS. 10 and 11 show a fifth embodiment, in which the distal treatment section is the same as the treatment section 68 of the fourth embodiment, and other than the distal treatment section, the internal treatment is the same as in the first embodiment. The configuration is such that it can be inserted endoscopically into the body, and the same components are denoted by the same reference numerals and description thereof is omitted, but the same effects as in the fourth embodiment can be obtained.

FIGS. 12 and 13 show Disclosure Example 1 and FIG.
Reference numeral 2 denotes a storage case 90 for storing the coagulation treatment tool 61 described in the fourth embodiment. The storage case 90 is made of a material having a high thermal conductivity, for example, an aluminum material that has been subjected to alumite treatment.
A substantially V-shaped concave groove 91 for accommodating the main body 62 including the treatment section 68 is provided.
Is provided. Further, the storage case 90 is provided with a fixing band 93.

As shown in FIG. 13, the storage case 90 is placed on a sterile cloth 94 covering the patient's body at the time of surgery, and the fixing band 93 is clamped by forceps 95 such as a pair.
, The storage case 90 can be securely fixed.

The coagulation treatment tool 61 used for the operation is a treatment section 6
8 is heated to a high temperature, but by placing the main body 62 including the treatment section 68 of the coagulation treatment tool 61 in the concave groove 91, the heat of the treatment section 68 is conducted to the storage case 90 and Cooled. Therefore, there is an effect that the safety is high and the temperature control at the time of reuse can be accurately performed.

14 to 16 show Disclosure Example 2 and FIG.
Is a side view showing the entire ultrasonic coagulation incision tool, FIG. 15 is a perspective view of the treatment section, and FIG. 16 is a cross-sectional view when the treatment section is closed.

An insertion portion 102 is provided on the main body 101 of the ultrasonic coagulation / incision device 100, and a rotatable jaw 103 is provided at the tip of the insertion portion 102. Joe 1
Numeral 03 is rotated by a hand operation unit 104 provided on the main body 101, and a serrated anti-slip portion 105 is provided on the lower surface.

Further, the probe 106
Are inserted so as to be able to advance and retreat in the axial direction.
The base end of the ultrasonic transducer 107 provided on the main body 101
And the probe 106 is vibrated in the axial direction by the ultrasonic vibrator 107.

A plurality of ridges 108 are provided at the tip of the probe 106 in parallel with the vibration direction. When the jaws 103 are closed and the living tissue is grasped, the ridges 108 of the probe 106 come into contact with the living tissue. However, the recess 109 does not come into contact with the living tissue.

Accordingly, the jaw 103 is closed and the probe 1
When the living tissue is grasped between the position and the position 06 and the probe 106 is ultrasonically vibrated, the living tissue is coagulated by heat generated by the ultrasonic vibration. Subsequently, when the jaw 103 is further closed, the coagulated portion is formed on the convex portion 108 of the probe 106.
The living tissue is incised because it comes into line contact with the living tissue. When the ultrasonic vibration of the ultrasonic transducer 107 is stopped, the probe 1
06 has a large heat dissipation area due to the convex ridges 108 and the concave ridges 109, so that the temperature drops sharply.

According to each of the above embodiments, the following configuration is obtained.

(Supplementary Note 1) In a surgical instrument having a pair of grasping portions at its distal end for grasping a living tissue, and opening and closing the grasping portions in response to opening and closing operations of a hand operating portion, at least one of the grasping portions is heated. A surgical instrument having a generating section, wherein a tissue contact surface of the heat generating section is formed in an arc-shaped cross section.

(Supplementary Note 2) In a surgical instrument having a pair of grasping portions at its distal end for grasping a living tissue, and opening and closing the grasping portions in response to opening and closing operations of a hand operating portion, at least one of the grasping portions is heated. A surgical instrument comprising a generator, wherein the tissue contacting surface of the heat generating unit has a smaller area than the tissue contacting surface of the opposing gripper.

(Supplementary note 3) The surgical instrument according to Supplementary note 1 or 2, wherein the tissue contacting surface of the other gripping portion disposed opposite to the heat generating portion is formed of a heat insulating member.

(Supplementary Note 4) The surgical instrument according to Supplementary note 1 or 2, wherein the grip portion has a curved structure.

(Supplementary note 5) The surgical instrument according to Supplementary note 1 or 2, wherein the grip portion has a double-opening structure.

(Supplementary note 6) The surgical instrument according to Supplementary note 1 or 2, wherein a non-slip portion is provided on the other gripping portion arranged to face the heat generating portion.

(Supplementary note 7) The surgical instrument according to Supplementary note 1 or 2, wherein a coating for preventing scorching of tissue is applied to outer surfaces of the pair of grip portions.

(Supplementary note 8) The surgical instrument according to Supplementary note 1 or 2, wherein the tissue contacting surface of the other gripping portion disposed opposite to the heat generating portion is a heat generating portion having a rectangular cross section.

(Supplementary note 9) The surgical instrument according to Supplementary note 1 or 2, wherein the edge of the tissue contacting surface of the heat generating portion is C-chamfered or R-chamfered.

(Supplementary note 10) The surgical instrument according to Supplementary note 1 or 2, wherein the tissue contacting surface of the other gripping portion disposed to face the heat generating portion is a heat insulating material having flexibility.

(Supplementary Note 11) In the power supply device for supplying power to the heat generating unit, an output circuit for outputting power to the heat generating unit, setting means for setting the output, temperature and output mode, and the setting means And a control means for controlling the output to the heat generating section based on the power supply.

[0075]

As described above, according to the present invention, at least one of the pair of gripping portions has a heat generating portion,
Since the tissue contact surface of the heat generating part is formed in an arc-shaped cross section, it is structurally simple, and the incision can be made from coagulation by a series of operations, and the tissue incision is excellent and the operability can be improved. There is.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a surgical instrument according to a first embodiment of the present invention.

FIG. 2 is a side view of the surgical instrument of the embodiment.

FIG. 3 is an exemplary perspective view of a holding unit according to the embodiment;

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

FIG. 5 is an electric circuit diagram of the embodiment.

FIG. 6 is a graph of the embodiment.

FIGS. 7A and 7B show a second embodiment of the present invention, wherein FIGS.
(D) is a cross-sectional view of the treatment section, and (e) and (f) are second views of (d).
Sectional drawing which expanded the grip part of FIG.

FIG. 8 is a perspective view of a thermocoagulating incision forceps showing a third embodiment of the present invention.

FIG. 9 shows a fourth embodiment of the present invention, wherein (a) is a side view of the entire scissors-type coagulation treatment tool, (b) is a plan view of the treatment portion, and (c) is a perspective view of a jaw.

FIG. 10 is an overall side view of a thermocoagulated incision forceps showing a fifth embodiment of the present invention.

FIG. 11 is a partially sectional side view of the treatment section of the embodiment.

FIG. 12 is a perspective view of the storage case for storing the coagulation treatment tool according to the first disclosed example.

FIG. 13 is a perspective view of the storage case according to the first embodiment of the disclosure in a used state;

FIG. 14 is a side view showing the entire ultrasonic coagulation and incision tool showing the disclosure example 2;

FIG. 15 is a perspective view of a treatment section according to the second embodiment;

FIG. 16 is a cross-sectional view of the disclosure example 2 when the treatment section is closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Thermocoagulation forceps 5 ... Hand operation part 6 ... Insertion part 7, 8 ... Grip part 22 ... Ceramic heater 23 ... Heater

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hideto Yoshimine 2-43-2 Hatagaya, Shibuya-ku, Tokyo F-term in Olympus Optical Co., Ltd. (reference) 4C060 FF14 GG06 GG24 JJ13 JJ23 KK47

Claims (2)

[Claims] 1. A surgical instrument having a pair of grasping portions at its distal end for grasping a living tissue and opening and closing the grasping portions in response to opening and closing operations of a hand operation portion, wherein at least one of the grasping portions has a heat generating portion. And a tissue contacting surface of the heat generating portion is formed in an arc-shaped cross section. 2. A surgical instrument having a pair of grasping portions at its distal end for grasping a living tissue, and opening and closing the grasping portions in response to opening and closing operations of a hand operation portion, wherein at least one of the grasping portions has a heat generating portion. A surgical instrument having a heat-generating portion having a smaller area than a tissue-contacting surface of an opposing gripper.