JP4964700B2 - End of the endoscope - Google Patents

Description

  The present invention relates to a distal end portion of an endoscope.

In so-called confocal endoscopes, etc., an observation window for normal observation for acquiring an observation image focused on a subject far from the surface and an enlarged observation image focused on a subject closely contacting the surface are provided. A close-up observation window for acquisition is provided in the distal end main body of the insertion portion, and the close-up observation observation window is disposed on a protruding surface that protrudes from the other portion of the distal end main body so as to be in close contact with the subject. (For example, Patent Document 1).
JP 2006-68205, paragraph [0022]

  Such an observation window for close observation may cause trouble in observation due to adhesion of mucus in the body to the surface as in the case of the normal observation window. Mucus and the like can be washed away by ejecting water or air from a nozzle formed with an opening toward the surface.

  However, since the nozzle protrudes forward from the surface of the observation window, if the nozzle is arranged in the vicinity of the observation window for close-up observation, the close-up observation window for contact cannot be brought into close contact with the subject. A magnified observation image cannot be obtained.

  For this reason, conventionally, a nozzle for surface cleaning is not provided in the observation window for close-up observation, and even if mucus or the like adheres to the surface of the observation window, it is difficult to acquire an unclear enlarged observation image as it is. Did not get.

  The present invention enables the close-up observation window to be in close contact with the subject, and can cleanly clean the surface of the close-up observation window so that a clear magnified observation image can be obtained. The object is to provide the tip of a mirror.

  In order to achieve the above object, the distal end portion of the endoscope of the present invention includes a normal observation observation window for acquiring an observation image focused on a subject at a position away from the surface, and a subject closely contacting the surface In the distal end portion of the endoscope provided with an observation window for contact observation for obtaining a magnified observation image in focus on the distal end portion main body of the insertion portion, a hollow recessed from the periphery around the entire circumference of the distal end portion main body An observation window for normal observation is arranged outside the depression area, a suction port and an observation window for adhesion observation are arranged on the bottom surface of the depression area, and an observation window for adhesion observation is formed on the side wall of the depression area. A nozzle for spraying a fluid on the surface of this is formed.

  According to the present invention, by arranging the suction port and the observation window for contact observation on the bottom surface of the depression region, the subject can be brought into close contact with the observation window for contact observation by sucking the body mucosa from the suction port, In addition, a nozzle for spraying fluid onto the surface of the observation window for close-up observation is formed in the side wall of the recessed area, so that the dirt on the surface of the observation window for close-up observation can be washed away cleanly and clearly enlarged. An observation image can be acquired, and the nozzle does not get in the way when the subject is brought into close contact with the observation window for close observation.

  A normal observation observation window for acquiring an observation image focused on a subject located away from the surface, and a close-up observation observation window for acquiring a magnified observation image focused on a subject closely contacting the surface; In the distal end portion of the endoscope provided with the distal end main body of the insertion portion, a hollow region that is recessed from the periphery is formed in the distal end portion main body, and the observation window for normal observation is disposed outside the recessed region, The suction port and the observation window for contact observation are arranged on the bottom surface of the recessed area, and a nozzle for spraying fluid onto the surface of the observation window for contact observation is formed in the side wall of the recessed area.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of the distal end portion of the endoscope, and FIG. 2 is a front view. The distal end surface 2a of the distal end portion main body 2 connected to the distal end of the flexible insertion portion 1 An observation window for normal observation 3 for acquiring an observation image and an illumination window 4 for emitting illumination light for illuminating the subject are arranged. Reference numerals 5 and 6 denote an air supply nozzle and a water supply nozzle for blowing air and water on the surface of the observation window 3 for normal observation.

  In the normal observation observation window 3, an observation optical system (not shown) that is focused at a front position, for example, about 2 to 10 cm away from the surface of the normal observation observation window 3 is built in, and is used for normal observation. The observation image acquired through the observation window 3 is picked up by a solid-state image sensor and transmitted to the outside. However, an image guide fiber bundle may be used for image transmission.

  Further, the distal end surface 2a of the distal end main body 2 is, for example, 1 to 5 mm from the surroundings in the entire circumference in a region not including the observation window 3 for normal observation, the illumination window 4, and the air supply and water supply nozzles 5 and 6 described above. A recessed region 7 that is depressed to a certain extent is formed.

  Then, on the bottom surface of the depression region 7, as shown in FIG. 3 illustrating a cross section taken along the line III-III in FIG. 2, observation for contact observation for acquiring a magnified observation image focused on a subject in close contact with the surface. The window 8 and the suction port 9 are arranged side by side facing forward.

  For example, a well-known confocal observation optical system (not shown) is disposed in the close-up observation window 8, and a microscopic enlarged image of a subject that is in close contact with the surface of the close-up observation window 8 is acquired. The suction port 9 also serves as a treatment instrument protrusion that is an outlet of a treatment instrument insertion channel (not shown).

  In addition, an air / water supply nozzle 10 for selectively blowing air and water to the surface of the observation window 8 for close-up observation is formed in the side wall portion of the recessed area 7 so as to open toward the surface of the observation window 8 for close-up observation. Has been. However, nozzles for air supply and water supply may be provided separately, or only one of them may be provided.

  In the distal end portion of the endoscope of the embodiment configured as described above, in the case where mucus in the body adheres to the surface of the observation window 8 for close-up observation and a clear magnified observation image cannot be acquired, air supply is performed. By appropriately ejecting water and air from the water supply nozzle 10 toward the surface of the observation window 8 for close observation, the mucus adhering to the surface of the observation window 8 for close observation is washed away and sucked and discharged from the suction port 9. Can be made.

  Further, when acquiring a magnified observation image of a subject, as shown in FIG. 4, an operation of performing suction from the suction port 9 in a state where the distal end surface 2a of the distal end portion main body 2 is pressed against a body mucous membrane serving as a subject. As a result, the mucous membrane is sucked into the suction port 9 and is brought into close contact with the surface of the contact observation window 8, so that an enlarged observation image focused on the subject is reliably acquired from the contact observation window 8. And its operation is not hindered by the presence of the air / water nozzle 10.

  When the suction is strongly performed, a so-called suction marker in which the contour of the depression region 7 is copied on the mucous membrane surface is attached, and the enlarged observation site is confirmed by normal observation from the observation window 3 for normal observation. Can do.

It is an external appearance perspective view of the front-end | tip part of the endoscope of the Example of this invention. It is a front view of the front-end | tip part of the endoscope of the Example of this invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 of the distal end portion of the endoscope according to the embodiment of the present invention. It is sectional drawing of the state by which the in-vivo mucous membrane was attracted | sucked to the suction opening in the front-end | tip part of the endoscope of the Example of this invention.

Explanation of symbols

2 tip body 2a tip surface 3 observation window for normal observation 7 depression area 8 observation window for contact observation 9 suction port 10 air / water supply nozzle (nozzle)

Claims (1)

A normal observation observation window for acquiring an observation image focused on a subject located away from the surface, and a close-up observation observation window for acquiring a magnified observation image focused on a subject closely contacting the surface; In the distal end portion of the endoscope provided with the distal end body of the insertion portion,
The tip body is formed with a recessed region that is recessed from the entire periphery, the observation window for normal observation is disposed outside the recessed region, and the suction port and the observation window for contact observation are disposed in the recessed region. A distal end portion of an endoscope, which is disposed on the bottom surface and has a nozzle for spraying a fluid on the surface of the observation window for close-contact observation, formed in a side wall portion of the hollow region.

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