JP2616943B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a so-called front side view, front perspective, which has a mechanism capable of inserting an insertion portion into a body cavity and observing the inner wall of the body cavity and performing auxiliary diagnosis and treatment. Type endoscope.

[Related Art] An ultrasonic endoscope provided with an ultrasonic probe for ultrasonic diagnosis at the distal end of an insertion section is known. Further, an endoscope provided with an observation window, an illumination window, a suction port for sucking out a body fluid, and the like near the distal end of such an endoscope is also known. The suction port and a suction line connected to the suction port are used for performing auxiliary diagnosis and treatment by inserting various endoscope treatment tools from an operation unit or the like.

[Problems to be solved by the invention]

However, conventional endoscopes are disclosed, for example, in
As disclosed in Japanese Patent Publication No. 129, there is a problem that the treatment tool for an endoscope cannot be protruded from the suction port to the outside because the suction pipe is bent substantially at a right angle toward the suction port. It has been proposed that the inside of the suction port be provided with a gently inclined conduit so that the treatment tool for an endoscope can easily protrude. For this purpose, it is necessary to take extra length of the rigid portion at the distal end. In addition, there is a problem that the suffering of the subject who undergoes the endoscopy is increased. There is also a means of providing an elevating mechanism for projecting the distal end of the treatment tool out of the suction port. However, this increases the outer diameter of the hard distal end portion and causes pain to the subject. Even when the distal end of the treatment tool is configured to be able to protrude outside the suction port, the treatment tool protrudes out of the range of the illumination light from the illumination window and the observation range from the observation window, and the treatment protrudes into these ranges. It is difficult to position the tool tip.

It is an object of the present invention to provide an endoscope capable of radiating a beam of a processing probe for an auxiliary diagnosis such as a Doppler probe or a microwave probe in an observation visual field direction without enlarging a shape of a hard tip portion. It was done.

[Means and actions for solving the problems]

The present invention is proposed to solve the above-described problem, and has an endoscope in which an observation window, an illumination window, and a suction port that is continuous with a suction pipe through which an auxiliary probe can be inserted are provided on a side surface of a hard end portion of the insertion portion. In the mirror, the abutting surface against which the auxiliary probe inserted into the suction channel abuts inside the suction port is a reflecting surface that reflects sound waves, electromagnetic waves, and the like that are input and output from the tip of the auxiliary probe to an observation field of view. The reflection surface is fixedly provided on the hard distal end portion. Thus, sound waves, electromagnetic waves, and the like can be reliably emitted in the observation visual field direction using the auxiliary probe for treatment and diagnosis using the suction pipe.

〔Example〕

1 and 2 show a first embodiment of the present invention.
FIG. 1 is an overall view of an endoscope. Hard tip and curved part 2
And the soft part 3 are sequentially connected to form the insertion part 4 and extend to the ultrasonic operation part 5. The ultrasonic operation unit 5 is provided with an operation unit 6 for operating the bending unit 2, air supply, water supply, and suction operation. Further, the ultrasonic operation unit 5 has an insertion port for a probe that supplies a beam such as an ultrasonic Doppler probe or a pulse wave probe.
A universal cord 7 having an endoscope connector 8 at the tip and an electric cable cord 9 having an electrical connector 10 at the tip are provided. The endoscope connector 8 connects to a video processor, and the electrical connector 10 connects to an ultrasonic observation device.

2A, 2B, and 2C show the internal structure of the distal end hard portion 1. FIG. The ultrasonic probe 15 is provided in a tip cap 17 filled with an ultrasonic transmission medium 16, and has a drive shaft via a rotor 12.
Connected to 25. Reference numeral 13 denotes a bearing that rotatably holds the rotor 12. Lighting window 1 behind tip cap 17
8, light guide fiber 19 and observation window 2 that follow this
0, optical system 14 connected thereto, solid-state imaging device 21, signal cable 22, air / water nozzle 23, and ultrasonic probe 15
A hollow flexible drive shaft 25 having a signal cable 24 for transmitting transmission / reception signals inserted therein is provided. Further, a suction port 27 and a suction pipe line 26 connected to the suction port 27 extend to the insertion port 11 of the probe. An auxiliary probe such as an ultrasonic Doppler probe 29 is inserted into the suction conduit 26. The observation window 20 such as an objective lens has a visual field range 30 of approximately 90 ° to the side of the insertion portion distal end 1. A reflecting surface 28 is provided on the abutting surface of the auxiliary probe inside the suction port 27 where the distal end of the auxiliary probe abuts. The light is emitted. The reflecting surface 28 is fixedly provided as shown (the same applies to the following embodiments).

The method of using the ultrasonic endoscope configured as described above will be described. First, the insertion section 4 is inserted into the dining room or the stomach from the subject's mouth. After the stomach is filled with degassed water, the ultrasonic probe 15 performs ultrasonic scanning to display an ultrasonic tomographic image on a monitor of an ultrasonic observation apparatus. Next, the ultrasonic Doppler probe 29 is inserted into the suction conduit 26 from the probe insertion port 11 of the operation unit 6,
As shown in FIG. 2B, the distal end 29a of the ultrasonic Doppler probe 29 reaches the distal end of the suction pipe 26. Actually, after the tip 29a strikes the reflection surface 28 provided on the contact surface of the auxiliary probe inside the suction port 27, the tip 29a is retracted and
29a is secured in the above position. This state is a diagnostic reference completion state by the ultrasonic diagnostic Doppler probe 29 for auxiliary diagnosis, and when a Doppler beam is emitted, it is reflected on the anti-slope surface 28 and emitted toward the center of the visual field range. If there is blood flow information in the vicinity, the reflected reception signal returns along the same path and enters the ultrasonic Doppler probe tip 29a, which is displayed as a waveform on the monitor sent to the observation device and expressed by voice from the speaker You. Since the distance between the ultrasonic tomographic plane Y and the ultrasonic Doppler beam X is kept substantially constant and the direction in which X is emitted is clear, the target blood flow site is projected on the monitor with the ultrasonic tomographic image. When the tip 1 of the insertion portion is moved by the predetermined interval to display Doppler information on the monitor, the amount of information pertaining to the portion to be inspected increases, and highly accurate endoscope diagnosis can be performed.

In this manner, necessary information can be properly obtained without projecting the treatment tool out of the suction port 27, so that the endoscope with high accuracy can be obtained without increasing or decreasing the outer diameter of the hard distal end portion 1. Mirror diagnosis is possible.

FIG. 3 shows a second embodiment of the invention, in which parts corresponding to those of the first embodiment are denoted by the same reference numerals. This shows the distal end hard portion 32 of the side-view type endoscope for children which does not perform ultrasonic scanning and has an outer diameter as small as possible. Glass other than metal is used for the abutment surface of the auxiliary probe inside the suction port 27.
Heat-resistant reflective member 33 with poor thermal conductivity such as ceramics
Is embedded, and the microwave probe 34 is inserted through the suction conduit 26. The microwave 35 emitted from the distal end 34a of the microwave probe 34 is reflected by the reflecting surface 28, exits the visual field, and enters the same path.

According to this, even if the reflecting surface 25 is heated by the microwave 35,
The burn is prevented without conducting to the distal end hard portion 32. If the buried reflecting member 3 is detachably provided with a screw or the like, maintenance and management such as replacement and cleaning of the reflecting member 33 can be facilitated.

FIG. 4 shows a third embodiment of the present invention, in which a longitudinal tomographic type electron sector type (phased array type) probe having an ultrasonic scan range 36 of approximately 90.degree.
37 and a signal cable bundle 38 connected thereto, and a suction port having a reflective surface 28 on the abutment surface of the auxiliary probe inside.
27 and a suction conduit 26 connected thereto, and a front oblique observation window 40, an optical system 41a and an optical fiber handle 39 connected to the observation window 40 are provided. An ultrasonic Doppler probe 29 is inserted into the suction line 26, and a Doppler beam enters and exits the visual field range 30a.

As a result, the ultrasound image diagnosis and the Doppler blood flow diagnosis can be performed after filling the stomach with degassed water as in the first embodiment. In this case, since the ultrasonic tomographic image and the emission direction of the Doppler beam can be crossed, it is possible to obtain reliable blood flow information of the target site.

The present invention is not limited to the above embodiments,
Various laser probes, heater probes, and the like can be used as treatment tools by adopting a configuration that can suppress heat generation on the reflection surface.

〔The invention's effect〕

As described above, according to the present invention, it is possible to insert a probe for diagnosis and treatment into the suction conduit and perform appropriate auxiliary diagnosis and treatment without penalizing or increasing the outer diameter of the hard distal end, thereby achieving high accuracy. Endoscopic diagnosis can be performed.

[Brief description of the drawings]

Fig. 1 is an overall view of an endoscope according to the present invention, Figs. 2A to 2C are cross-sectional views of the same rigid end portion, (B is A of A).
-A sectional view, C is a BB sectional view of A), FIGS. 3A and 3B are diagrams of a second embodiment of the present invention, and FIGS. 4A and 4B are diagrams of a third embodiment of the present invention. 1 ... Hard tip, 18 ... Illumination window 20 ... Observation window, 26 ... Suction line 27 ... Suction port, 28 ... Reflective surface

Claims (1)

(57) [Claims] 1. An endoscope provided with a suction port connected to a suction pipe through which an observation window, an illumination window, and an auxiliary rope can be inserted, on the side of a hard end portion of a distal end of the insertion section, wherein the endoscope is inserted into the suction pipe. The abutting surface against which the auxiliary probe abuts inside the suction port is a reflecting surface that reflects sound waves, electromagnetic waves, and the like that are input and output from the distal end of the auxiliary probe to an observation field of view, and this reflective surface is fixed to the hard distal end portion. An endoscope comprising: