JPH10137184A - Light guide cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light guide cable which is easy to handle with less confusion even when simultaneously using a plurality of hard mirrors, a light radiation means such as lighting probe. SOLUTION: This light guide cable 3 for transmitting light has one incident end side cable 7 linked to a light source unit 6 and a plurality of emission end side cables 8a, 8b and 8c detachably linked to a plurality of light radiation means such as a hard mirror 1 and a probe 2 for lighting. A link part 10 between the incident end side cable 7 and the plurality of emission end side cables 8a, 8b and 8c is provided near a link part with the light radiation means 1 and 2 in the light guide cable 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide cable for guiding illumination light to light radiating means such as an endoscope and an illumination probe.

[0002]

2. Description of the Related Art In recent years, endoscopic surgery using a rigid endoscope or the like has become widespread. In particular, various procedures have been performed in the abdominal cavity of a patient. Here, a rigid endoscope (laparoscope) used when performing laparoscopic surgery on a body tissue of a patient generally has a light guide cable for optical transmission with a built-in optical fiber bundle detachably connected thereto. Thus, the illumination light from the light source device is obtained.

[0003] In this type of laparoscopic surgery, the interior of the body is illuminated and observed with a single rigid scope. In this case, a single type optical fiber having one incident end and one exit end of the illumination light is used as a light guide cable for detachably connecting to the rigid endoscope and supplying the illumination light. .

[0004] On the other hand, in a new surgical procedure, a procedure is performed while simultaneously observing different parts with a plurality of endoscopes,
Attempts have been made to illuminate the treatment site from various directions to make it easier to observe. In this case, means for distributing and emitting the illumination light from one light source to a plurality of light sources is used.

[0005] As means for distributing the illumination light from one light source to a plurality of light sources as described above, for example, Japanese Utility Model Application Laid-Open No.
No. 108482, JP-A-5-288936, and the like. Here, a plurality of optical fiber cables are provided in JP-A-5-288936.
The emission ends of the plurality of optical fiber cables are detachably connected to the rigid mirror. Further, the incident ends of the plurality of optical fiber cables are bundled by one focusing base, and are arranged to face the light source.

In Japanese Utility Model Laid-Open Publication No. 51-108482, one end side (incident end side) of an optical fiber bundle provided in an optical fiber cable is bundled by one focusing base and arranged to face the light source side. ing. Further, a plurality of branch optical fiber bundles are provided on the other end side (output end side) of the optical fiber bundle. Each branch optical fiber bundle is configured to be detachably connected to light emitting means such as a rigid mirror.

[0007]

SUMMARY OF THE INVENTION Using a light guide cable having a single type of optical fiber having the above-mentioned conventional structure, a plurality of endoscopes are used to simultaneously perform treatment while observing different parts, When illuminating light from various directions, the same number of light sources as endoscopes used and a plurality of light guide cables are required. Therefore, the number of devices and cables installed in the operating room is increased, so that the operating room and the operative field are very crowded and hindered.

Further, even when a plurality of optical fiber cables are used as disclosed in Japanese Patent Application Laid-Open No. 5-288936, the same number of light guide cables as endoscopes used in the operating room are required in the operating room. Since the number of cables to be installed increases, the operating room and the surgical field are very crowded and hindered.

In the case of Japanese Utility Model Laid-Open Publication No. 51-108482, the number of cables installed in the operating room is still large, so that the operating room and the operating field are very crowded and obstructive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to reduce congestion in an operating room even when a plurality of rigid endoscopes and light emitting means such as illumination probes are used at the same time.
It is to provide a light guide cable that is easy to use.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a plurality of light emitting devices such as an endoscope and an illumination probe are detachably connected to a single incident end side cable connected to a light source device. In a light guide cable for optical transmission having an emission end side cable, a connection portion between the incident end side cable and the plurality of emission end side cables is provided near a connection portion with the light emitting means. Light guide cable. According to the above configuration, one incident end side cable connected to the light source device is extended to a position near the light emitting means, and a plurality of emission end side cables are arranged only at the position near the light emitting means. The length of the plurality of output-end-side cables installed in the operating room is shortened to prevent the plurality of output-end-side cables from becoming an obstacle in the operating room.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 (A)
Is a connection state of a light guide cable 3 for light transmission according to the present embodiment, which guides illumination light to a plurality of light emitting means such as a rigid endoscope (endoscope) 1 such as a laparoscope and an illumination probe 2. It shows.

The light guide cable 3 has a structure shown in FIG.
As shown in (B), a light guide fiber 5 composed of an optical fiber bundle is built in an outer tube 4 composed of a flexible resin tube.

The light guide cable 3 has one incident end side cable 7 connected to the light source device 6 and a plurality of, for example, three outgoing end side cables 8 in the present embodiment.
a, 8b, and 8c. Here, an incident end side connector 9 for detachably connecting to the light source device 6 is provided at the incident end on one end side of the incident end side cable 7.

Further, a branching portion (connecting portion) 10 is provided at the other end of the incident end side cable 7. The bases of the three emission end side cables 8a, 8b, 8c are connected to the branch portion 10. Then, the light guide fiber 5 disposed in the incident end side cable 7 of the light guide cable 3 is connected to the three outgoing end side cables 8 from the branch portion 10.
a, 8b, and 8c.

Also, the three emission end side cables 8a, 8
Outgoing end side first connectors 11 for detachably connecting to the rigid endoscope 1 are provided at the distal ends of two outgoing end side cables 8a and 8b of b and 8c, respectively. Further, a second connector 12 on the emission end side for detachably connecting to the illumination probe 2 is provided at the distal end of the remaining one emission end side cable 8c.

In the present embodiment, the branch portion 10 which is a connecting portion between the input end side cable 7 and the three output end side cables 8a, 8b, 8c is provided with three output end side cables 8a, 8c.
It is arranged near the first connector 11 and the second connector 12 which are connecting portions of b, 8c and a plurality of light emitting means such as the rigid endoscope 1 and the illumination probe 2.

The second connector 12 may be of the same type as the first connector 11, and the number of branches is not limited to three. It is also effective to provide the first connector 11 and the second connector 12 with apertures for varying the amount of light. Further, the branch portions 10 of the light guide cable 3 may be provided at two or more locations.

Therefore, the above configuration has the following effects. That is, in the light guide cable 3 of the present embodiment, the incident end connector 9 at the incident end of the incident end cable 7 is detachably connected to the light source device 6 and the two exit end cables 8a and 8b. The first connector 11 is used in a state where it is detachably connected to the rigid endoscope 1, and the second connector 12 of the remaining one emission end side cable 8 c is connected to the illumination probe 2. Therefore, since one light source device 6 and one light guide cable 3 can be connected to a plurality of rigid endoscopes 1 and a plurality of light emitting means such as an illumination probe 2, space saving in an operating room and an operation field can be achieved. .

Further, a branch portion 1 which is a connecting portion between the input end side cable 7 and the three output end side cables 8a, 8b, 8c.
Reference numeral 0 denotes a first connector 11 and a second connector 12 which are connecting portions between the three emission end side cables 8a, 8b, 8c and a plurality of light emitting means such as the rigid mirror 1 and the illumination probe 2.
, The light can be guided to the vicinity of the plurality of light radiating means by the single incident end side cable 7, and the lengths of the output end side cables 8a, 8b, 8c can be shortened. For this reason, even if a plurality of rigid endoscopes 1 and light emitting means such as the illumination probe 2 are used at the same time, the number of cables installed in the operating room can be reduced as compared with the related art, and congestion in the operating room is reduced. The light guide cable 3 installed in the operating room does not hinder the operator.

Further, the light guide cable 3 of the present embodiment is easy to handle such as setting and cleaning, and the total length of the light guide cable 3 can be short, so that the manufacturing cost can be reduced.

The branch portion 1 of the light guide cable 3
0 is made rotatable so that the branch portion 10 can be connected to the rigid endoscope 1.
Also, it can be set closer to the light emitting means side such as the illumination probe 2. Therefore, the length of the light guide cable 3 can be used effectively. Further, the stability of the light guide cable 3 is improved, and the light guide cable 3 has the effect of saving space, saving space and improving variability.

When the first connector 11 and the second connector 12 are provided with apertures for varying the amount of light, the brightness of each of a plurality of light emitting means such as the rigid mirror 1 and the illumination probe 2 is reduced. Adjustable to get the optimal brightness.

FIG. 2 shows a rigid endoscope 1 according to the first embodiment.
3 shows a trocar 21 used when inserting a light radiating means such as an illumination probe 2 into a patient's body and a use state of a retaining member 22 of the trocar 21.
In FIG. 2, reference numeral H indicates a body wall such as a patient's abdominal wall.

The trocar 21 is provided with an inner needle and an outer tube 23 (not shown). Here, the mantle tube 23
Is formed of a tube of a flexible resin such as PTFE. When the trocar 21 is used, the trocar 21 is inserted into the body wall H of the patient with the inner needle inserted into the outer tube 23. Further, after the trocar 21 is inserted into the body wall H of the patient, the inner needle is pulled out from the outer tube 23, and another insertion object, for example, the insertion portion of the rigid mirror 1 is inserted into the outer tube instead of the inner needle. It is adapted to be inserted into the tube 23.

At the base end of the outer tube 23, a tubular hand-side connecting member 24 is provided. A port 25 for supplying insufflation gas into the body cavity is protrudingly provided on the outer peripheral surface of the proximal connecting member 24. An external insufflation gas tube 26 for supplying insufflation gas is connected to the port 25.

Further, a ring-shaped sealing member 27 made of an elastic member such as silicon rubber is fitted on the inner peripheral surface of the hand-side connecting member 24. Then, the inner peripheral surface of the sealing member 27 lightly presses the outer peripheral surface of the insertion portion of the hard mirror 1 with its elastic force on the outer peripheral surface of the insertion portion of the rigid mirror 1 inserted into the outer tube 23, so that the lumen is airtight. To be sealed. Therefore, the insufflation gas supplied from the port 25 passes through a gap 28 formed between the inner peripheral surface of the proximal connecting member 24 and the outer peripheral surface of the outer tube 23 and the outer peripheral surface of the insertion portion of the rigid endoscope 1, and the distal end of the outer tube 23. It is led to the side.

Further, the retaining member 22 of the trocar 21
A semi-hard resin member such as polyethylene, that is, a tubular member 2 made of a soft material having a certain degree of hardness.
9 are provided. On the outer peripheral surface of the tubular member 29, a spiral ridge 30 for screwing and fixing to the body wall H is provided in a protruding manner. When a bent treatment tool is inserted into the mantle tube 23 of the trocar 21, the retaining member 22
Of the tubular member 29 is also moderate.

Further, at the base end of the tubular member 29, there is provided a large-diameter portion 31 having a larger diameter than other portions, and a flange-like flange portion 32 connected to the edge of the large-diameter portion 31. Have been. Here, a ring receiving portion 33 having a smooth surface is formed on the outer peripheral surface of the large diameter portion 31. A rigid fixing ring 34 made of, for example, metal is fitted on the ring receiving portion 33. The inner diameter of the fixing ring 34 is, as shown in FIG.
3 is set to be slightly smaller than the outer diameter dimension.

Next, the operation of the retaining member 22 of the trocar 21 having the above configuration will be described. In a normal state before the fixing ring 34 is fitted into the ring receiving portion 33 as shown in FIG.
Is held in a state where a slight gap is formed between the outer peripheral surface of the tubular member and the inner peripheral surface of the tubular member 29 of the retaining member 22.

Then, the fixing ring 34 is
3, the large-diameter portion of the tubular member 29 of the retaining member 22 has a difference between the inner diameter of the ring receiving portion 33 and the outer diameter of the fixing ring 34 due to the pressing force from the fixing ring 34. 31 is elastically deformed so as to contract inward. Therefore, the lumen inside the ring receiving portion 33 is narrowed, and the inner peripheral surface of the large diameter portion 31 of the tubular member 29 is pressed against the outer peripheral surface of the outer tube 23 as shown in FIG. Is fixed by friction.

At this time, the dimensional difference between the inner diameter of the mantle tube 23 and the outer diameter of the insertion portion of the rigid endoscope 1 is the difference between the inner diameter of the ring receiving portion 33 and the outer diameter of the fixed ring 34. Is larger than the dimensional difference, the inner peripheral surface of the mantle tube 23 does not press the insertion portion of the rigid endoscope 1. Therefore, the mantle tube 2
The gap 28 as an insufflation gas supply passage formed between the inner peripheral surface of the rigid mirror 3 and the outer peripheral surface of the insertion portion of the rigid endoscope 1 is maintained without change.

Therefore, the above configuration has the following effects. That is, a large-diameter smooth surface-shaped ring receiving portion 33 is provided at the base end of the tubular member 29 in the retaining member 22.
Is provided, and a fixing ring 34 having a smaller diameter than the ring receiving portion 33 is externally fitted to the ring receiving portion 33.
Since the retaining member 22 of the trocar 21 is fixed to the outer tube 23 of the trocar 21, the inner peripheral surface of the outer tube 23 does not press the insertion portion of the rigid endoscope 1 and the inner peripheral surface of the outer tube 23 A gap 28 as an insufflation gas supply path between the gasket and the outer peripheral surface of the insertion section of the rigid endoscope 1 can be reliably secured.

FIG. 4 shows a retaining member 22 'of a conventional trocar 21'. In this configuration, a screw hole-shaped threaded portion 35 and a tapered surface 36 for pressing are provided at the base end of the tubular member 29 ′ in the retaining member 22 ′.

Further, the retaining member 22 'and the mantle tube 23
And a male screw-shaped fastening member 37 is interposed therebetween. The fastening member 37 is provided with a male screw portion 38 that is screwed into the screw portion 35 of the tubular member 29 ′ and a tapered surface 39 that engages with the tapered surface 36.

Then, the space between the threaded portion 35 of the tubular member 29 'and the external thread 38 of the fastening member 37 is tightened, and the tapered surface 36 of the retaining member 22' is pressed against the tapered surface 39 of the fastening member 37. Thereby, the fastening member 37 is pressed against the outer peripheral surface of the outer tube 23 ', and the retaining member 22' of the trocar 21 'is moved to the outer tube 23' of the trocar 21 '.
To be fixed.

For this reason, the conventional retaining member 22 shown in FIG.
In ′ ′, when the retaining member 22 ′ of the trocar 21 ′ is fixed to the outer tube 23 ′ of the trocar 21 ′ by pressing the tightening member 37 against the outer peripheral surface of the outer tube 23 ′, the outer tube 23 is tightened by the tightening member 37. Is pressed inward, and the inner peripheral surface of the pressing portion 23a of the outer tube 23 'presses the insertion portion of the rigid mirror 1', and the inner peripheral surface of the outer tube 23 'and the outer periphery of the insertion portion of the rigid mirror 1'. Gap 28 'as an insufflation gas supply passage between the surface
May be blocked. On the other hand, in the retaining member 22 of the trocar 21 having the configuration shown in FIGS. 2 and 3A and 3B, the pressing force from the fixing ring 34 presses the outer tube 23 by the large diameter portion 31 and tightens. Since the margin is constant, the inner peripheral surface of the outer tube 23 does not press the insertion portion of the rigid endoscope 1 as described above, and the outer tube 2
The gap 28 as an insufflation gas supply path between the inner peripheral surface of the rigid mirror 3 and the outer peripheral surface of the insertion portion of the rigid endoscope 1 can be reliably ensured. Therefore, the air-supplying ability of insufflation gas is ensured while securing the retaining function to the trocar 21, which is the same as that of a conventional rigid linear endoscope or an endoscopic operation using a treatment tool. There is an effect that the surgery of the form can be performed without any trouble even when using a bent endoscope or a treatment tool.

FIG. 5 shows FIGS. 2 and 3 (A),
The first of the retaining members 22 of the trocar 21 shown in FIG.
This shows a modification of the first embodiment. In this modified example, FIG.
3A and 3B, a plurality of fine circumferential teeth 41 are provided on the inner peripheral surface of the tubular member 29 of the retaining member 22 corresponding to the ring receiving portion 33 in the axial direction of the tubular member 29. A hole-shaped meshing portion 42 having a substantially sawtooth cross-section is formed in parallel.

Further, on the outer peripheral surface of the outer tube 23 of this modified example, a meshing portion 43 meshing with the hole-shaped meshing portion 42 of the retaining member 22 is formed. A plurality of circumferential teeth 44 having a shape corresponding to the circumferential teeth 41 of the hole-shaped meshing portion 42 are arranged in the meshing portion 43 in the axial direction of the mantle tube 23.

Therefore, when the fixing ring 34 is fitted into the ring receiving portion 33 when the retaining member 22 of the present modification is used, the pressing force from the fixing ring 34 causes the large diameter of the tubular member 29 of the retaining member 22. The portion 31 is elastically deformed so as to shrink inward, and a part of the hole-shaped engaging portion 42 of the retaining member 22 and a part of the engaging portion 43 on the outer peripheral surface of the outer tube 23 are engaged. Therefore, the movement in the axial direction is mutually restricted by the meshing portion of the hole-shaped meshing portion 42 of the retaining member 22 and the meshing portion 43 of the outer peripheral surface of the mantle tube 23. The space between the trocar 21 and the mantle tube 23 is firmly fixed.

Accordingly, the retaining member 22 of the present modification is
However, the trocar 2 shown in FIGS. 2 and 3 (A) and (B)
Similarly to the first retaining member 22, the inner peripheral surface of the outer tube 23 does not press the insertion portion of the rigid endoscope 1, and the gap between the inner peripheral surface of the outer tube 23 and the outer peripheral surface of the insertion portion of the rigid endoscope 1 is not increased. The gap 28 as an insufflation gas supply path can be surely secured. Therefore, the air-supplying ability of insufflation gas is ensured while securing the retaining function to the trocar 21, which is the same as that of a conventional rigid linear endoscope or an endoscopic operation using a treatment tool. There is an effect that the surgery of the form can be performed without any trouble even when using a bent endoscope or a treatment tool.

FIGS. 6A and 6B show a second modification of the retaining member 22 of the trocar 21 shown in FIGS. 2 and 3A and 3B. In this modification, the configuration of the conventional retaining member 22 'of FIG. 4 is changed as follows.

That is, in this modification, as shown in FIGS. 6A and 6B, the outer tube 23 'is formed on the inner peripheral surface of the outer tube 23'.
A plurality of protrusions 51 are provided to protrude inward from a distal end to a proximal end in the inside. The fastening member 37 is also formed of a semi-hard resin material such as polyethylene, similar to the retaining member 22 '.

When the retaining member 22 'of this modification is used, first, the retaining member 22' is positioned at an arbitrary position of the outer tube 23 '. Then, the fastening member 37 is screwed and tightened. Then, the tapered surface 36 of the retaining member 22 ′ and the tapered surface 39 of the fastening member 37 are pressed against each other,
As shown in FIG. 6 (B), the distal end side of the tightening member 37 comes into contact with the outer peripheral surface of the outer tube 23 'so that the inner diameter becomes smaller just inward in the radial direction.

At this time, since the outer tube 23 'is made of a flexible resin, the outer tube 23' bends in the direction of the central axis similarly to the fastening member 37. At this time, the projection 51 on the inner peripheral surface of the outer tube 23 'comes into contact with the insertion portion of the rigid endoscope 1'. Therefore, the mantle tube 2
A gap 28 ′ as an insufflation gas supply passage between the inner peripheral surface of 3 ′ and the outer peripheral surface of the insertion portion of the rigid endoscope 1 ′ is not closed,
An insufflation path for insufflation gas is secured.

Further, when the outer tube 23 'is formed of an adhesive material such as polyurethane, the contact area with the insertion portion of the endoscope 1' is reduced by providing the projection 51. Accordingly, there is also an advantage that resistance when inserting the insertion portion of the endoscope 1 ′ is reduced.

Accordingly, the trocar 21 'having a flexible mantle tube 23', in which the retaining member 22 'of the present modified example secures the trocar 21' with the retaining function and ensures the air supply capability of insufflation gas. Can be provided. Therefore, a conventional rigid linear endoscope or the same type of operation as an endoscopic operation using a treatment tool can be performed without any trouble even when using a bent endoscope or a treatment tool. There is.

FIG. 7 shows FIGS. 2 and 3 (A),
3B of the retaining member 22 of the trocar 21 shown in FIG.
This shows a modification of the first embodiment. This modified example is different from the second modified example (see FIGS. 6A and 6B) in that a plurality of projections 51 on the inner peripheral surface of the outer tube 23 ′ of the trocar 21 ′ are replaced with the inner tube 23 ′. A plurality of ribs 61 extending continuously in the axial direction of the outer tube 23 'are provided on the peripheral surface. These ribs 61 are continuously provided at least at locations where the retaining members 22 'can be located, similarly to the protrusions 51 of the trocar 21' of the second modification (see FIGS. 6A and 6B). Have been.

Therefore, even with the above configuration, the same effect as that of the second modification can be obtained, and in this modification, particularly, when the outer tube 23 'is manufactured by resin molding, the rib 61
Is continuous in the axial direction of the mantle tube 23 ', so that there is an effect that the mold filling the lumen of the mantle tube 23' can be easily pulled out.

FIG. 8A is a view similar to FIG. 2 and FIG.
FIG. 11 shows a first modification of the trocar 21 shown in FIGS. In this modification, a helical ridge 71 for screwing and fixing to the body wall H is provided on the outer peripheral surface of the outer tube 23 of the trocar 21 so as to project therefrom. FIG. 8A
Reference numeral 72 denotes an inner needle that is inserted into the outer tube 23.

Therefore, in the above-mentioned construction, the operation of screwing and fixing the protruding portion 71 of the outer tube 23 of the trocar 21 to the body wall H is merely performed.
Can be fixed to the body wall H.
2 becomes unnecessary. Therefore, the configuration of the trocar 21 can be simplified, and the cost can be reduced.

FIG. 8B is a view similar to FIG. 2 and FIG.
FIG. 14 shows a second modification of the trocar 21 shown in FIGS. This modified example is a first modified example (FIG. 8).
In the trocar 21 of (A), the tip of the spiral of the ridge 71 of the outer tube 23 is provided in a state of being continuous with the blade of the inner needle 72. In this case, the same effect as in the first modification can be obtained.

FIG. 9 shows a modification of the illumination probe 2 of the first embodiment (see FIG. 1). In this modification, a sharp needle-like piercing portion 81 is provided at the tip of the illumination probe 2 as shown in FIG.

Therefore, in this modification, the illumination probe 2 can be directly punctured into the body wall H by the piercing portion 81 at the tip of the illumination probe 2. Therefore, when the illumination probe 2 is used, it is not necessary to use the trocar 21 shown in FIGS. 2 and 3A and 3B, and the usability can be improved.

FIGS. 10 and 11 show a light guide needle 91 connected to the light guide cable 3 of the first embodiment (see FIG. 1). The light guide needle 91 is provided with a curved tube 93 made of a transparent material, as shown in FIG. A plurality of light guide fibers 94 having different lengths are provided in the curved tube 93. Further, a sharp needle-like piercing portion 9 is provided at the tip of the curved tube 93.
5 are provided.

Therefore, in the above configuration, when the light guide needle 91 is used, as shown in FIG.
The light guide needle 91 is inserted by the piercing portion 95 at the tip of
Can be directly punctured into the body wall H. Therefore, when the light guide needle 91 is used, FIGS.
It is not necessary to use the trocar 21 shown in FIG.

Further, since a plurality of light guide fibers 94 having different lengths are provided in the curved tube 93, sufficient brightness over a wide range can be obtained by puncturing one light guide needle 91 into the body wall H. Can be obtained. Therefore, since it is not necessary to puncture a plurality of light guide needles into the patient's body wall H, invasion to the patient can be reduced.

Note that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows. (Additional Item 1) In a light guide cable that is detachable from an endoscope and an illumination probe and has one incident end and a plurality of emission ends, the light guide cable includes a light guide cable between the incident end and the plurality of emission ends. A light guide cable, wherein a branch portion is provided near a device side such as an illumination probe.

(Effect of Additional Item 1) Since it is guided by a single cable to the vicinity of the apparatus, it does not hinder the operator. Easy handling (setting, washing, etc.). Since the total length is short, the manufacturing cost is reduced.

(Additional Item 2) The light guide cable according to Additional Item 1, wherein the branch portion is rotatable. (Effect of Additional Item 2) The length can be used effectively. The branch point can be set closer to the device side. The stability of the cable is improved. Space saving because it does not take up space. Improved variability.

(Additional Item 3) The light guide cable according to additional items 1 and 2, wherein the branch point is at two or more locations. (Additional Item 4) The light guide cable according to additional items 1 to 3, wherein at least one of the plurality of emission ends is provided with a connector that can be connected to an endoscope, and the rest is a peripheral device such as an illumination probe. Light guide cable characterized by having a connector connectable to the light guide cable.

(Additional Item 5) A light guide cable detachably connected to an endoscope and an illumination probe, wherein one light input end and a plurality of output ends are provided.

(Prior Art No. 5) A light guide cable detachably connected to an endoscope. In recent years, endoscopic surgery using a rigid endoscope or the like has become widespread. Various procedures have been performed, especially in the abdominal cavity. In the past, a single rigid endoscope was used to illuminate and observe the inside of the body. In the new surgical procedure, treatment was performed while observing different parts simultaneously with multiple endoscopes, or illumination light was applied from various directions. Attempts have been made to make it easier to observe.
Generally, the rigid endoscope has a structure in which illumination light from a light source is obtained by detachably connecting a light guide cable. Means for distributing and emitting illumination light from one light source into a plurality of light sources are disclosed in Japanese Utility Model Application Laid-Open No.
Although it is shown in 8936 and the like, as a light guide cable for detachably connecting to a rigid endoscope and supplying illumination light, only one entrance end and one exit end have been devised.

(Problem to be Solved in Supplementary Item 5) Since the conventional light guide cable has one emission end,
When a plurality of rigid endoscopes or an illumination probe are used at the same time, a plurality of light sources and cables are required, and the operating room and the operative field are extremely crowded, which is a problem.

(Purpose of Supplementary Item 5) A light guide cable with less congestion even when a plurality of rigid endoscopes and illumination probes are used simultaneously. (Means and Actions for Solving the Problem in Supplementary Item 5)
In a light guide cable detachably connected to an endoscope and an illumination probe, one light-emitting end and a plurality of light-emitting ends are provided, and at least one of the light-emitting ends is connectable to the endoscope. Was provided, and the rest were provided with connectors connectable to the illumination probe. With this light guide cable, a plurality of illuminators including an endoscope can be connected to one light source.

(Effect of Supplementary Item 5) Since one light source and one light guide cable can be connected to a plurality of rigid endoscopes and the like, space saving in an operation room and an operation field can be achieved. If a variable light aperture is provided on the connector, the brightness of each can be adjusted, and optimal brightness can be obtained.

(Supplementary Item 6) At least one of the emission ends is provided with a connector connectable to an endoscope, and the rest is provided with a connector connectable to an illumination probe.
The light guide connector according to claim 5, wherein a connector for connecting to the light source is provided at the incident end.

(Additional Item 7) The light guide cable according to the additional items 5 and 6, wherein a bundle of cables is provided between the plurality of output ends and one input end. (Additional Item 8) The relative positions of the base end to which the supply path for insufflation gas is connected, the outer tube made of a flexible tube, the inner needle, and the inserted living tissue and the outer tube are determined. In a trocar comprising a retaining means for fixing by tightening a flexible tube, a fixing ring having an inner diameter slightly smaller than the outer diameter of the proximal end is fitted into a part of the proximal end of the retaining means. A trocar comprising:

(Additional Item 9) The difference between the inner diameter of the flexible tube and the outer diameter of the object inserted into the trocar is larger than the difference between the diameter of the base end portion where the fixing ring is fitted and the inner diameter of the fixing ring. 7. The trocar according to claim 8, wherein

(Additional Item 10) The trocar according to Additional Item 8, wherein rough surfaces are formed on the outer peripheral surface of the flexible tube and the inner peripheral surface of the base end of the retaining means. (Additional Item 11) The trocar according to Additional Item 8, wherein circumferentially engaging teeth are formed on the outer peripheral surface of the flexible tube and the inner peripheral surface of the base end of the retaining means.

(Means and Actions for Solving the Problems of Supplementary Items 8 to 11) A base end to which an insufflation gas supply path is connected, an outer tube made of a flexible tube, an inner needle, In a trocar comprising a retaining means for fixing the relative position between the inserted living tissue and the mantle tube by tightening the flexible tube, a part of the proximal end of the retaining means has an outer diameter at its proximal end. A gap is secured between the inner circumference of the flexible tube and the insertion object even when the retaining means is fixed by fitting a fixing ring having an inner diameter slightly smaller than the inner diameter.

(Effects of Additional Items 8 to 11) Unlike the conventional method of pressing the tapered surface with a screw and tightening the fixing member with the flexible tube, the amount of force for pressing the flexible tube and the tightening allowance are constant. Therefore, a gap is secured between the inner peripheral surface of the flexible tube and the insertion object. Therefore, it was possible to provide a trocar having a flexible mantle tube, in which the insufflation function was ensured and the insufflation ability of insufflation gas was secured while securing the trocar. Therefore, an operation of the same form as that of the conventional endoscopic operation using a rigid linear endoscope / treatment instrument can be performed without any trouble even when the bent endoscope / treatment instrument is used.

(Supplementary Item 12) The relative positions of the base end to which the insufflation gas supply path is connected, the outer tube made of a flexible tube, the inner needle, the inserted living tissue, and the outer tube are shown. A trocar comprising a retaining means for fixing the flexible tube by tightening the flexible tube, wherein the inner peripheral surface of the flexible tube is formed so as not to be continuous over the entire circumferential direction.

(Additional Item 13) An additional item 12 wherein a plurality of projections are provided on the inner peripheral surface of the flexible tube.
The described trocar. (Additional Item 14) The trocar according to Additional Item 12, wherein a rib-shaped projection continuous in the longitudinal direction is provided on an inner peripheral surface of the flexible tube.

(Prior Art in Additional Items 8 to 14)
The present invention relates to a trocar (consisting of an outer tube and an inner needle) used for endoscopic surgery. An ordinary hard trocar is provided with a retaining mechanism as shown in FIG. The retaining mechanism is for fixing the mantle tube to the abdominal wall at a predetermined insertion depth, and a spiral member provided with a spiral for biting the abdominal wall fastens the fixing portion in the radial direction. It is structured to be raised and fixed to the mantle tube. On the other hand, with the development of endoscopic surgery, non-straight, bent, grasping forceps and the like have come to be used for surgery. In this case, since the bent forceps cannot be inserted into the hard mantle tube, a case in which a flexible resin such as PTFE is used for the mantle tube of the trocar has been increasing.

(Problems to be Solved in Additional Items 8 to 14) However, when a flexible resin is used for the mantle tube,
Since the retaining spiral member directly tightens the mantle tube,
The inner wall of the outer tube comes into close contact with the outer peripheral surface of an endoscope or a treatment tool that passes through the inside. Normally, insufflation gas for providing a space in the abdominal cavity is supplied from a gap formed between the outer peripheral surface of the endoscope insertion portion and the inner peripheral surface of the mantle tube while monitoring the abdominal cavity pressure. If the outer peripheral surface of the endoscope and the inner peripheral surface of the mantle tube are brought into close contact in this manner, the supply path of the insufflation gas will be blocked. (See FIG. 4) (Purposes of Additional Items 8 to 14) The present application has been made in view of the above-mentioned problems. It is an object of the present invention to provide a trocar having a flexible mantle tube capable of ensuring performance.

(Means and Actions for Solving the Problems of Supplementary Items 12 to 14) An outer tube made of a flexible tube and a proximal end to which a supply path for insufflation gas is connected, an inner needle, In a trocar comprising a retaining means for fixing a relative position between a living tissue and a mantle tube by tightening the flexible tube, the inner circumferential surface of the flexible tube being continuous over the entire circumference in the circumferential direction. Even if the flexible tube is pressed against an endoscope or a treatment tool inserted into the outer tube by the retaining means, a gap as a flow path for insufflation gas is ensured. It is characterized by.

(Effects of Supplementary Items 12 to 14) A trocar having a flexible outer tube can be provided, in which the trocar has a retaining function and the insufflation ability of insufflation gas is ensured. Therefore, the same type of surgery as the conventional operation under the endoscope using the rigid linear endoscope / treatment instrument can be performed without any trouble even when the bent endoscope / treatment instrument is used.

[0079]

According to the present invention, one incident end side cable connected to the light source device, and a plurality of emission ports detachably connected to a plurality of light emitting means such as an endoscope and an illumination probe are provided. In the light guide cable for optical transmission having an end cable, the connection portion between the input end cable and the plurality of output end cables is provided near the connection portion with the light emitting means, so that a plurality of rigid mirrors, Even if light emitting means such as an illumination probe are used at the same time, it is possible to provide a light guide cable with little congestion in the operating room and good usability.

[Brief description of the drawings]

FIG. 1A is a schematic configuration diagram illustrating a connection state of a light guide cable according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view of a main part of the light guide cable according to the first embodiment; FIG.

FIG. 2 is a side view showing a use state of a trocar retaining member in a partial cross section.

FIG. 3A is a side view showing a partial cross section of a state before a fixing ring is attached to a trocar retaining member,
(B) is a side view showing a state in which a fixing ring is attached to a retaining member of the trocar in a partial cross section.

FIG. 4 is a side view showing a mounting state of a conventional trocar retaining member in a partial cross section.

FIG. 5 is a longitudinal sectional view of a main part showing a first modification of the trocar retaining member.

6A is a perspective view of a main part showing a second modification of the trocar retaining member, and FIG. 6B is a perspective view of a main part showing an attached state of the second modification of the trocar retaining member. Longitudinal section.

FIG. 7 is a perspective view of a main part showing a third modification of the trocar retaining member.

FIG. 8A is a side view showing a first modification of the trocar, and FIG. 8B is a perspective view of a main part showing a second modification of the trocar.

FIG. 9 is a perspective view of a main part showing a modification of the illumination probe of the first embodiment.

FIG. 10 is an exemplary perspective view of a main part showing a light guide needle connected to the light guide cable according to the first embodiment;

11 is a schematic configuration diagram of a main part showing a use state of the light guide needle of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rigid endoscope (light emitting means) 2 Illumination probe (light emitting means) 6 Light source device 7 Incident end side cable 8a, 8b, 8c Outgoing end side cable 10 Branch part (connection part)

Claims (1)

[Claims] 1. An input end side cable connected to a light source device and a plurality of output end side cables detachably connected to a plurality of light emitting means such as an endoscope and an illumination probe. A light guide cable, wherein a connection portion between the incident end side cable and the plurality of emission end side cables in a light transmission cable for light transmission is provided near a connection portion with the light emitting means.