JP2011245011A - Hood for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hood for an endoscope capable of preventing storage of a liquid near a lens of the endoscope.SOLUTION: The hood has a hood body 3 including a cylindrical attaching portion 31 which is detachably attached to an outer circumferential surface 21 on a tip end of a nasal endoscope 2, and a protrusion 32 which is provided extending from the tip end of the attaching portion 31 and maintains a constant distance between a tip end 22 of the nasal endoscope 2 and an affected part. A water sending tube 4 for jetting a cleaning liquid and a drainage tube 5 for sucking a liquid such as the contaminated cleaning liquid or blood flowing from the affected part are provided on an inner circumferential surface 33 of the protrusion 32. A drainage port 52 of the drainage tubes 5 is disposed nearer to a base end than the water sending port 42 of the water sending tube 4.

Description

  The present invention relates to an endoscope hood attached to the tip of an endoscope used in, for example, endoscopic submucosal dissection (ESD).

  Conventionally, when performing a procedure under an endoscope such as endoscopic submucosal dissection (ESD), an endoscope hood is attached to the distal end of the endoscope. Thereby, the distance between the distal end of the endoscope and the affected part is kept constant, and a good visual field of the affected part can be secured.

  Further, this endoscope hood is known to have a water supply port for ejecting a cleaning liquid for cleaning the affected part from the tip and a drain port for sucking a dirty cleaning liquid or a liquid such as blood flowing out from the affected part ( For example, see Patent Document 1). According to this, dirt such as mucous membrane and bleeding of the affected part can be washed with the cleaning liquid ejected from the water supply port, so that the visual field of the affected part can be maintained in a good state.

JP-A-55-84141

  However, since the drainage port of the endoscope hood of Patent Document 1 is disposed at the distal end position of the hood, when the distal end of the endoscope is directed upward, the cleaning solution or affected part ejected from the water supply port is used. There is a risk that liquid such as blood flowing out may accumulate in the hood. There is a problem that accumulation of liquid in the hood leads to deterioration of the visual field by the endoscope.

  An object of the present invention is to provide an endoscope hood capable of reliably draining the liquid accumulated in the hood and easily maintaining the visual field of the endoscope in a good state. And

  In order to solve the above-described problems, an endoscope hood according to the present invention includes a cylindrical mounting portion that is detachably mounted on an outer peripheral surface of a distal end portion of an endoscope, and extends from the distal end of the mounting portion. In an endoscope hood comprising a protrusion that maintains a constant distance between the distal end of the endoscope and the affected part, the protruding part includes a water supply tube that supplies a cleaning liquid for cleaning the affected part from the distal end, and the protrusion And a drainage tube for discharging the liquid accumulated inside the portion from the distal end, and the distal end position of the drainage tube is arranged closer to the proximal end side than the distal end position of the water supply tube.

  According to the present invention, since the distal end (drainage port) of the drainage tube is disposed on the proximal end side with respect to the distal end (waterfeeding port) of the water supply tube, even when the distal end of the endoscope faces upward, The liquid accumulated in the hood is easily discharged from the drain port of the drain tube.

  In the present invention, when the attachment portion is attached to the distal end portion of the endoscope, the distal end position of the drainage tube is based on the distal end position of the endoscope or the distal end position of the endoscope. It is preferable to arrange on the end side.

  According to this, since the distal end (drain outlet) of the drainage tube is disposed on the proximal end side with respect to the distal end position (lens position) of the endoscope or the lens position of the endoscope, the distal end of the endoscope is Even when facing upward, the liquid can be discharged without leaving the liquid accumulated on the lens of the endoscope from the tip (drainage port) of the drainage tube. For this reason, it is easy to maintain liquid in the vicinity of the lens of the endoscope, and to maintain the field of view of the endoscope in a good state.

  Moreover, in this invention, it is preferable that the said drain tube is provided in the inner peripheral surface of the said protrusion part so that attachment or detachment is possible.

  According to this, since the drain outlet of the drain tube can be disposed at an arbitrary position, the distance between the distal end of the endoscope and the affected part can be arbitrarily adjusted. That is, even if the protrusion amount of the hood is arbitrarily adjusted, the drain outlet of the drain tube is disposed at a position where drainage efficiency is high (for example, the lens position of the endoscope or the base end side of the lens position of the endoscope). be able to.

  In the present invention, it is preferable that the endoscope is a nasal endoscope, and the water supply tube and the drain tube are provided on an inner peripheral surface of the protruding portion.

  According to this, since the outer peripheral surface of the hood becomes a smooth curved surface by attaching the water supply tube and the drain tube inside the hood, the burden on the patient when the outer peripheral surface of the hood contacts the body cavity wall is reduced. can do.

Explanatory drawing which shows one structural example of the hood for endoscopes of this embodiment. Explanatory drawing which shows the modification of the hood for endoscopes of this embodiment. Explanatory drawing which shows the usage example of the hood for endoscopes of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration of the endoscope hood 1 of the present embodiment will be described with reference to FIG.

  An endoscope hood 1 according to an embodiment of the present invention includes a cylindrical attachment portion 31 that is detachably attached to an outer peripheral surface 21 of a distal end portion of a nasal endoscope 2, and extends from the distal end of the attachment portion 31. And a hood body 3 having a protrusion 32 that maintains a constant distance between the distal end 22 of the nasal endoscope 2 and the affected part. Further, the inner peripheral surface 33 of the projecting portion 32 is provided with a water supply tube 4 for ejecting a cleaning liquid and a drainage tube 5 for sucking a dirty cleaning liquid or a liquid such as blood flowing out from an affected part.

  Since the hood body 3 is attached to the nasal endoscope 2, it is preferable that the thickness of the hood body 3 is as thin as possible. In this embodiment, it is as thin as 0.5 to 0.6 mm, for example. Further, as shown in FIG. 3, in the endoscopic submucosal dissection (ESD), the mucous membrane of the affected area must be raised by the protruding portion 32. Therefore, the material of the hood body 3 is the same as that of the present embodiment. For example, silicone rubber having a hardness of 40 degrees or more is employed.

  The tube length of the water supply tube 4 is, for example, 1,000 to 2,500 mm in this embodiment. As shown in FIG. 1, the distal end portion 41 of the water supply tube 4 is located on the inner peripheral surface 33 rather than the outer peripheral surface 34 of the projecting portion 32 because the transnasal endoscope 2 must be inserted from the nose after the hood is attached. It is preferable that they are adhered. This is because when the distal end portion 41 of the water supply tube 4 is attached to the outer peripheral surface 34 of the protruding portion 32, the water supply tube 4 may come into contact with the nasal cavity wall, which may put a burden on the patient. The tip of the water supply tube 4 (the water supply port 42) is disposed at the same position as the tip 35 of the protruding portion 32. This is because if the tip 42 of the water supply tube 4 protrudes from the tip 35 of the protruding portion 32, the tip 42 of the water supply tube 4 comes into contact with the affected part, which may put a burden on the patient.

  The drainage tube 5 has a tube length of, for example, 1,000 to 2,500 mm in this embodiment. The distal end portion 51 of the drainage tube 5 is bonded to the inner peripheral surface 33 of the protruding portion 32 in the same manner as the water supply tube 4. The tip of the drainage tube 5 (drainage port 52) is disposed at the same position as the tip 22 of the nasal endoscope 2. Thereby, when the tip of the nasal endoscope 2 faces upward, the liquid accumulated on the lens 23 of the nasal endoscope 2 can be discharged from the drain port 52 of the drain tube 5 without leaving. it can. Even if the drainage port 52 of the drainage tube 5 is arranged on the proximal side with respect to the distal end 22 of the nasal endoscope 2, the same effect as described above can be obtained.

  Next, a method for using the endoscope hood 1 of the present embodiment will be described.

  First, as shown in FIG. 1, a mounting portion 31 of the endoscope hood 1 is mounted on the outer peripheral surface 21 of the distal end portion of the nasal endoscope 2, and the nasal endoscope is inserted through a body hole such as a patient's nose. 2 is inserted into the body. When the distal end 22 of the nasal endoscope 2 approaches the affected part, the cleaning liquid is supplied from the water supply port 42 of the water supply tube 4 and the cleaning liquid is ejected toward the affected part.

  Next, the protrusion 32 of the endoscope hood 1 is pressed around the affected area. Then, as shown in FIG. 3, treatment and treatment are performed with a high-frequency knife W or the like inserted into the channel 24 of the transnasal endoscope 2. At this time, liquid such as blood or cleaning liquid may be collected on the lens 23 of the nasal endoscope 2, but collected from the drain port 52 of the drain tube 5 disposed on the inner peripheral surface 33 of the protrusion 32. The liquid can be discharged, and the visual field of the nasal endoscope 2 can be kept good.

  Further, since the distal end 52 of the drainage tube 5 is disposed at the same position as the distal end 22 of the nasal endoscope 2, the distal end 22 of the nasal endoscope 2 is positioned upward as shown in FIG. Even in the case where it is directed to the liquid, the liquid accumulated in the vicinity of the lens of the nasal endoscope 2 can easily flow to the distal end 52 of the drainage tube 5, and the liquid in the protruding portion 32 can be efficiently discharged.

  In the endoscope hood 1 of the present embodiment, as shown in FIG. 1, the distal end portion 51 of the drainage tube 5 is bonded to the inner peripheral surface 33 of the protruding portion 32, but as shown in FIG. 2, The distal end portion 51 of the drainage tube 5 may be detachable without being bonded to the inner peripheral surface 33 of the protruding portion 32.

  Specifically, the water supply tube 4 and the drain tube 5 are bonded to the vicinity of the tip, and only the tip is separated into two forks. And the front-end | tip part 41 of the water supply tube 4 is adhere | attached on the internal peripheral surface 33 of the protrusion part 32, and the front-end | tip part 51 of the drainage tube 5 is a free state, as shown to Fig.2 (a).

  As shown in FIG. 2 (b), the drain tube 5 has a tip 51 of the drain tube 5 between the inner peripheral surface 33 of the projecting portion 32 and the outer peripheral surface 21 of the tip of the nasal endoscope 2. Fix by pinching. At this time, the drainage port 52 of the drainage tube 5 is disposed at the same position as the distal end 22 of the nasal endoscope 2.

  According to this, since the drainage port 52 of the drainage tube 5 can be disposed at an arbitrary position, the distance between the distal end 22 of the nasal endoscope 2 and the affected part is arbitrarily adjusted, and the nasal endoscope 2 can be ensured. That is, even if the protrusion amount of the hood is arbitrarily adjusted, the drain port 52 of the drain tube 5 can be arranged at a position where drainage efficiency is high.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the case where the endoscope hood 1 is attached to the nasal endoscope 2 has been described, but the endoscope hood 1 may be attached to the oral endoscope. . Moreover, in the said embodiment, although the water supply tube 4 is attached to the internal peripheral surface 33 of the protrusion part 32, when mounting | wearing with an oral endoscope, the water supply tube 4 is arrange | positioned on the outer peripheral surface 34 of the protrusion part 32. Also good.

DESCRIPTION OF SYMBOLS 1 ... Endoscope hood 1, 2 ... Transnasal endoscope, 3 ... Hood main body, 32 ... Projection part, 4 ... Water supply tube, 42 ... Water supply port, 5 ... Drain tube, 52 ... Drain port.

Claims (4)

A cylindrical mounting portion that is detachably mounted on the outer peripheral surface of the distal end portion of the endoscope, and a protruding portion that extends from the distal end of the mounting portion and maintains a constant distance between the distal end of the endoscope and the affected portion In an endoscope hood comprising:
The protrusion is provided with a water supply tube for supplying a cleaning liquid for cleaning the affected part from the tip, and a drain tube for discharging the liquid accumulated inside the protrusion from the tip,
The endoscope hood is characterized in that a distal end position of the drainage tube is arranged on a proximal end side with respect to a distal end position of the water supply tube.   When the attachment portion is attached to the distal end portion of the endoscope, the distal end position of the drainage tube is disposed on the proximal end side relative to the distal end position of the endoscope or the distal end position of the endoscope. The endoscope hood according to claim 1, wherein the endoscope hood is provided.   The endoscope hood according to claim 1 or 2, wherein the drainage tube is detachably provided on an inner peripheral surface of the projecting portion. The endoscope is a transnasal endoscope,
The hood for an endoscope according to any one of claims 1 to 3, wherein the water supply tube and the drainage tube are provided on an inner peripheral surface of the protruding portion.

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