JPH01160523A - Endoscope - Google Patents

Abstract

PURPOSE:To enhance the durability of an endoscope by preventing the breakage of a refractivity gradient type lens by the vibration thereof, by providing a vibration absorbing member between the refractivity gradient type lens and a lens pipe. CONSTITUTION:A sheath main body 8 is inserted in the body cavity under the observation through an endoscope 1 to be guided to a region to be treated. A vibration transmitting member 28 is allowed to protrude from the sheath main body 8 by revolving the control ring 23 provided to an adaptor 3 to be brought into contact with the region to be treated and excited by an ultrasonic wave to be vibrated. The region to be treated ground or emulsified by vibration is sucked by a suction pump through the hollow part provided in the vibration transmitting member 28 to be discharged out of the body cavity. In this case, the lens pipe 17 constituting the insert part parallelly provided in the vicinity of the vibration transmitting member 28 is vibrated by the vibration of the vibration transmitting member 28 but, since a vibration absorbing member 36 is provided between a refractivity gradient type lens 34 and an inner pipe 31, no vibration is transmitted to the refractivity gradient type lens 34 and the refractivity gradient type lens 34 is not broken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope that can prevent a gradient index lens from breaking due to vibrations caused by ultrasonic waves.

[Problems to be solved by conventional techniques and inventions] In recent years,
Endoscopes are widely used to observe organs within a body cavity by inserting an IQ-length insertion section into a body cavity, and to perform various therapeutic procedures using a treatment instrument inserted into a treatment instrument channel as necessary. There is.

The endoscope includes a flexible endoscope whose insertion part is flexible and can observe a target region in a body cavity through a curved path from the oral cavity, etc., and a flexible endoscope whose insertion part is inserted in a substantially straight line. There is also a rigid endoscope.

In order to make the diameter of the observation optical system as small as possible among the rigid endoscopes, a needle-shaped refractive index gradient lens (trade name "Selfoc lens") is installed in the observation optical system behind the objective lens system.
There are some that use This gradient refractive index lens has a diameter of approximately 1111 m, and the refractive index is highest at the center and decreases continuously in the diameter direction, and transmits images while forming images at regular intervals. It is something.

On the other hand, ultrasonic aspiration devices have come to be used to remove intracerebral hematomas caused by cerebrovascular disorders such as cerebral hemorrhage and subarachnoid hemorrhage. This ultrasonic suction device brings the tip of the vibration transmission member into contact with blood under observation with a rigid endoscope.
The vibration transmission member is vibrated by ultrasonic waves to crush the hematoma and suction it through a hollow portion provided within the vibration transmission member.

However, in the rigid V1 endoscope using the gradient refractive index lens, when the objective lens system and the gradient index lens are joined in the exterior pipe, it is difficult to absorb the radial deviation of the optical axis. Because there is a small gap between the refractive index gradient lens and the exterior pipe, when used with an ultrasonic suction device, the refractive index gradient lens is excited by the ultrasonic waves and vibrates, causing breakage. There is a problem.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope that can prevent a gradient index lens from breaking due to vibration and improve durability. be.

[Means and effects for solving the problems] Inner features of the present invention
A vibration absorbing member capable of absorbing vibrations caused by an ultrasonic suction device is provided between the refractive index gradient lens and the exterior pipe.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

Figures 1 to 5 relate to an embodiment of the present invention; Figure 1 is a sectional view of the tip of the lens tube, Figure 2 is an overall explanatory diagram when an ultrasonic suction device is attached to an endoscope; 3 is an explanatory diagram of the entire endoscope provided with the positioning member, FIG. 4 is an explanatory diagram of the vibration state of the vibrating member, and FIG. 5 is a sectional view taken along the line A-Δ' in FIG. 3.

In FIG. 2, an endoscope 1 is detachably connected to a sheath 2 at its front end and an adapter 3 at its rear end, and an ultrasonic suction device at the rear end of the adapter 3. 14 are detachably connected.

A connecting portion 7 provided at the rear of the sheath 2 is detachably connected to a connecting portion 6 provided at the front end of the endoscope 1. An elongated tube-shaped sheath body 8 is connected to the front of the connecting portion 7 . The connecting portion 7 is provided with a water supply spout 9 capable of supplying irrigation fluid or the like into the sheath body 8, and can be opened by a cock 11.

The endoscope 1 includes a rigid and elongated insertion section 12 that is inserted into the sheath body 8, a large-diameter operation section 13 connected to the rear of the insertion section 12, and a large-diameter operation section 13 connected to the rear of the insertion section 12. The eyepiece 14 includes an eyepiece section 14 branched diagonally rearward from the side, and a treatment instrument attachment section 16 provided at the rear end of the operating section 13.

The insertion section 12 is composed of a lens tube 17 and a light guide tube (not shown), and the lens tube 17 is inserted through the operating section 13 to the vicinity of the part where the eyepiece section 14 extends. ing. Further, the distal end of the lens tube 17 is positioned between the distal end of the sheath body 8 and the passageway.

The operation section 13 is provided with a light guide base 18 that can supply illumination light to a light guide (not shown) inserted into the light guide tube (not shown).

The adapter 3 includes an adapter body 19 and a slide member 2.
1, and one adapter main body can be connected to the treatment instrument attachment part 16 by screwing a detachable ring 22 provided at the front part of the adapter 3.

The tip of a slide member 21 is inserted into the rear of the adapter body 19, and the slide member 21 can be slid in the axial direction by an adjustment ring 23 provided at the rear of the adapter body 19.

A case 24 for housing the ultrasonic suction device 4 is provided at the rear of the slide member 21 by screwing the front part of the case 24 together.

A horn 26 formed in a conical shape that tapers toward the front is provided at the front of the ultrasonic suction device 4 .A vibration transmitting member 2 is connected to the front of the horn 26 by a connecting portion 27 .
8 is provided. This vibration transmission member 28 is tube-shaped and precisely formed, and is connected to the adapter 3 and the inner support 11.
1, and is inserted into the sheath main body 8 in parallel with the insertion section 1, and this distal end is in a space between the distal end of the sheath main body 8 and the channel.

Note that a suction tube (not shown) communicating with a hollow portion provided in the vibration transmission member 28 is connected to the rear end of the ultrasonic suction device 4, so that suction can be performed by a suction pump (not shown). Furthermore, a signal line (not shown) connected to an ultrasonic oscillator (not shown) extends to the rear end of the ultrasonic suction device 4, and by oscillating this ultrasonic oscillator, the ultrasonic suction device 4 is vibrated. This vibration can be transmitted to the vibration transmission member 28 via the horn 26.

In FIG. 1, the lens tube 17 is a rigid and elongated outer tube 29.
An inner tube 31 is fitted inside, and an objective lens system 32 is positioned at the distal end of the inner tube 31 by a spacer 33. An inner tube 3 is provided on the rear end surface of this objective lens system 32.
The front end surface of the elongated cylindrical gradient index lens 34 having an outer diameter slightly smaller than the inner diameter of the lens 1 is brought into contact with the optical axis of the objective lens system 32 and the optical axis of the gradient index lens 34. It is set up like this. This gradient index lens 3
4, that is, between the inner tube 31 and the inner tube 31, there is a vibration absorbing member 36 having elasticity such as a rubber tube or a silicone filler and capable of sufficiently attenuating vibrations caused by ultrasonic waves. It is provided.

Now, the operation of the endoscope 1 configured as described above will be explained.

The connecting portion 6 of the endoscope 1 is connected to the connecting portion 7 of the sheath 2 by inserting the insertion portion 12 into the sheath body 8. The vibration transmission member 28 of the ultrasonic suction device 4 is inserted into the adapter 3 to connect the adapter 3 and the ultrasonic suction device 4. Then, the distal end of the vibration transmission member 28 is inserted into the endoscope 1, and the operating section 13 and the adapter 3 are connected by the detachable ring 22.

By doing this, the distal end of the insertion portion 12 and the vibration transmission member 28 is located between the distal end of the sheath body 8 and the passageway.

After assembling as described above, the sheath body 8 is inserted into the body cavity while being observed using the endoscope 111, and the sheath body 8 is guided to the treatment site. Rotate the adjustment ring 23 provided on the adapter 3 to cause the vibration transmission member 28 to protrude from the sheath body 8,
Place it in contact with the treatment area.

The vibration transmission member 28 is applied with ultrasonic waves and vibrates. The treatment site crushed or emulsified by the vibration is suctioned by a suction pump (not shown) through a hollow part provided in the vibration transmission member 28 and discharged out of the body cavity.

In this case, the lens tube 17 constituting the insertion portion 12 provided parallel to the vibration transmitting member 28 is connected to the vibration transmitting member 28.
However, since the vibration absorbing member 36 is provided between the refractive index gradient lens 34 and the inner tube 31, the vibration is not transmitted to the refractive index gradient lens 34, and the refraction There is no chance that the gradient lens 34 will break.

Note that a hardening adhesive such as acrylic or epoxy resin is filled between the inner tube 31 and the refractive index gradient lens 34, so that the diffraction index gradient lens 34 causes transverse vibration and the inner tube 31 You may try not to come into contact with it.

Further, as shown in FIGS. 3 to 5, the vibration transmitting member 28 may be fixed to the insertion portion 12 by a positioning member 37 at a node so as not to be affected by vibrations caused by the ultrasonic suction device 4. .

The vibration transmission member 28 vibrates as a standing wave as shown in FIG. Vibration transmission part PA2 that vibrates due to standing waves
The amplitude of each point of 8 varies depending on the location, and at a certain point, the amplitude is maximum, and at a certain lff1, the amplitude becomes O, and the former is called an antinode and the latter is called a plate.

At this node, a positioning member 37 is provided in the sheath body 8 as shown in FIG. Inserted refractive index gradient lens 34
can be prevented from coming into contact with the insertion portion 12, the sheath body 8, etc. and breaking.

[Effects of the Invention] As explained above, according to the present invention, by providing a vibration absorbing member between the gradient index lens and the lens tube, it is possible to prevent the gradient index lens from breaking due to vibration. , and the durability of the endoscope can be improved.

[Brief explanation of the drawing]

Figures 1 to 5 relate to an embodiment of the present invention; Figure 1 is a sectional view of the tip of the lens tube, Figure 2 is an overall explanatory diagram when an ultrasonic suction device is attached to an endoscope; 3 is an explanatory diagram of the entire endoscope provided with the positioning member, FIG. 4 is an explanatory diagram of the vibration state of the vibrating member, and FIG. 5 is a sectional view taken along the line A-A' in FIG. 3. 1... Endoscope 4... Ultrasonic suction device 12... Insertion section 17... Lens tube 29... Outer tube 31... Inner tube 34... Refractive index gradient lens 36.・・Vibration absorbing member

Claims (1)

[Scope of Claims] An ultrasonic suction device that is vibrated by ultrasonic waves and crushes a treated area by the vibrations, and a lens tube that is configured with a refractive index gradient lens and that allows observation of the treated area. An endoscope, characterized in that a vibration absorbing member is provided in the lens tube to absorb vibrations caused by an ultrasonic suction device of the gradient index lens.