JPS612837A - Hard endoscope sheath - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a rigid endoscope sheath that allows easy switching between water supply and drainage. [Technical Background of the Invention and its Problems 1] In recent years, endoscopes have been widely used in the medical and industrial fields. The above-mentioned endoscopes include flexible endoscopes whose insertion portions are flexible so that they can be inserted through curved paths, and rigid endoscopes whose insertion portions are rigid. The above-mentioned rigid endoscope has a rigid insertion section, so it has good aiming performance, and a relay lens system with high resolution can be used as the image transmission means, so it can be used as a flexible endoscope, which is generally used in flexible endoscopes. This method has the advantage that it is possible to obtain images that are clearer and easier to diagnose than when using an image transmission means formed of a transparent fiber bundle. By the way, the above-mentioned rigid endoscope is inserted into a body cavity by passing through a hollow rigid endoscope sheath. The above-mentioned sheath (for rigid endoscope) is provided with functions for water supply and drainage so as to facilitate observation using a rigid endoscope or therapeutic treatment by inserting a treatment instrument. For example, when used as a resectoscope, a resect handle is attached to the rear end of the sheath, and the rigid endoscope body (optical viewing tube) and resection electrode are inserted into the sheath hollow part. It is installed in this way. Thus, the irrigation fluid can be sent through the inside of the sheath from the water supply port provided on the proximal side of the sheath, and can be discharged through the sheath. FIG. 7 shows a conventional example disclosed in US Pat. No. 37,91379. In the conventional example, the rear end of the insertion vibrator 2 is fixed to the front end of a hollow sheath body 1, and a water supply port 3 and a drainage port 4 are arranged on the outer periphery of the sheath body 1 on a plane perpendicular to the central axis of the sheath body 1. A lever 6 for switching water supply and drainage is provided, which protrudes so as to fit within the water supply port 3 and the water discharge port 4, and which is rotatable within the window 5 which is adjacent to the water supply port 3 and the drain port 4 and extends in the circumferential direction of C1.

[It's being pulled. As shown in FIG. 8(a) or FIG. 8(b), the base side of this lever 6 is connected to the sheath body 1
It is fixed to a hollow cock core 7 that is rotatably fitted inside the cock core 7, and this cock core 7 has holes 8a at two places on the outer periphery.
, 8b are provided. Therefore, as shown in FIG. 8(a) or (b), the hole 8a
, 8b can be communicated with the water supply port 3 and the drain port 4, respectively, at each rotational position of the lever 6. The above-mentioned Ifi problem when switching between water supply and drainage is that when operating the lever 6, the protruding water supply port 3 and drain port 4 get in the way, and especially when the water supply port 3 and the drain port 4 are connected to There was a drawback that it became difficult to rotate the lever 6. [Objective of the Invention 1] The present invention has been made in view of the above-mentioned points, and provides a rigid endoscope having a simple structure and an easy-to-operate feeding/drainage switching II structure that allows easy switching of the feeding/draining water. The purpose is to provide a sheath for [Summary of the Invention 1 The present invention provides a valve body that fits inside a sheath body provided with a water supply port and a drain port, and the base of the valve body is fixed to the valve body, and a window provided on the outer peripheral wall of the sheath body. An operating lever is provided that protrudes to the outside through the sheath body, and by moving this lever in the axial direction of the sheath body, the valve body can be slid in a fitted state to selectively open and close the water supply port and the drain port. It is constructed. [Embodiments of the Invention] The present invention will be specifically described below with reference to the drawings. FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure shows the external appearance of the first embodiment with a part cut away, FIG. 2 shows a longitudinal sectional view of FIG. 1, FIG. 3 shows a cross section taken along the line A-A of FIG. to adjust the water supply status (same figure (a)
)), water supply and drainage stopped state (same figure (
b)) shows the positional relationship between the water supply port, the drain port, and the valve body when set to the drainage state ((C) in the same figure). As shown in FIG. 1, the rigid endoscope sheath 11 of the first embodiment includes an elongated and hollow sheath insertion vibe 12 that is inserted into a body cavity, and a rear end of this sheath insertion vibe 12 that is screwed or the like. The sheath body 13 is connected to the front end of the sheath body 13 via means. An insulating chip member 14 having an opening cut out in a diagonal direction is fixed to the front end of the sheath insertion vibe 12. On the other hand, the sheath main body 13 has a cylindrical shape with a hollow part communicating with the hollow part of the sheath insertion vibe 12, and has a water supply port 16 and a drain port 1 at the upper and lower parts of the cylinder, for example.
7 is provided protrudingly. Note that the water supply port 16 is installed at a position slightly shifted in the front direction closer to the sheath insertion pipe 12 than the drain port 17 is. Inside the sheath body 13, as shown in FIG. 2, there is a substantially annular valve body that is hollow on the inside and is slidable in the front-rear direction along the axial direction of the sheath insertion vibe 12 (or the sheath body 13). 18 are fitted and housed. The base side of an operating lever 19 is fixed to the valve body 18 as shown in FIG. and protrudes laterally of the sheath body 13. Therefore, by moving the lever 19 that penetrates this window 20 and projects to the outside of the sheath body 13 back and forth, the valve body 18 inside the sheath body 13 is fitted to the inner wall surface of the sheath body 13, and the lever 19 is moved back and forth. It is designed to be movable. Therefore, in the state where the valve body 18 is set to be moved to the rearmost side (the state shown in FIG. 4(a)), the front end of the valve body 18 is at the position of the rear edge of the base of the water supply tube 16 (or further rearward). orientation (tilt), the water supply port 16 is in a state where it can communicate with the sheath insertion vibe 12 side, and water can be supplied.
7 can be occluded. Further, when the valve body 18 is moved to the most forward position (the state shown in FIG. 4(C)), the valve body 18 closes the water supply port 16 and opens the drain port 17. 17 is brought into communication with the sheath insertion vibrator 12 side, and water can be drained. Furthermore, in state B) of FIG. 4(b), where the setting position of the valve body 18 is set to the center position after ]y+, the water supply port 16
The valve body 18 is configured to close both the drain port 17 and the drain port 17.
The longitudinal length of
This is the setting. The lever 19 is provided so as to protrude in the horizontal direction between the water supply port 16 and the drain port 17 which are protruded from above and below, and the movable direction is the front and back direction (not the circumferential direction), so the lever 19
It has a feature that the water supply port 16 and the drain port 17 can always be operated without getting in the way. still,
Water supply 016° Drain port 17. For example, the levers 19 may be provided so that the protruding directions thereof are 120 degrees with respect to the circumferential direction so that they do not interfere with each other. Of course, other angles may also be used. The sheath 11 of the first embodiment has a retract handle 21 that can be attached to the sheath 11 from behind the thickened rear end of the sheath body 13, as shown by the two-dot chain line in FIG. Further, an optical viewing tube serving as a rigid endoscope can be attached from the rear of the select handle 21. Furthermore, the rear end of the resection electrode can be fixed to this resect handle 21. According to the first embodiment configured in this way, the resect handle 21 is attached to the resect handle 21, the optical viewing tube is attached from behind it, and the rear end of the electrode is fixed to the resect handle 21. When performing prostate resection using a Zectoscope, if it is necessary to send irrigation fluid to secure a field of view for clear observation, it is easy to do so by simply moving the lever 19 backwards (see Figure 4 (a). ) can be set to water supply state. In this case, since the lever 19 is provided to protrude in the horizontal direction between the water supply port 16 and the drain port 17 which project upward and downward, the water supply port 16 and the drain port 17 can be used without getting in the way. (Also, when installing the water supply tube and drainage tube, it can be done without the lever 19 getting in the way.) Also, to stop the water supply, move the lever 19 a little forward, as shown in Figure 4(b). It can be set to stop the water supply and drainage without displaying the problem. When draining water further, the drain state shown in No. 49 (C) can be set by simply moving the lever 19 further forward. FIG. 5 shows a second embodiment of the invention. In the rigid endoscope sheath 31 of this second embodiment,
The water supply port 16 and the drain port 17 do not shift back and forth,
For example, they are provided vertically facing each other. On the other hand, as shown in FIG. 6, the valve body 32 fitted and housed inside the sheath main body 13 has both ends of the annular member, one end (rear end) side facing the lower side, and the other end facing toward the bottom side. (The front end) has a shape with the upper end side cut out. The other parts are the same as those of the first embodiment and are of A construction. In this second embodiment, when the lever 19 is set to the rearmost position, the positional relationship between the valve body 32, the water supply port 16, and the drain port 17 is as shown in FIG. It is possible to create a water supply state where it communicates with the hollow part of the pipe. By moving one lever slightly forward and setting it to an intermediate position, the system can be set to stop water supply and drainage, and by moving the lever further forward, it can be set to a drainage state. The effects of this second embodiment are substantially the same as those of the first embodiment. It should be noted that the valve body 32 in the second embodiment is not limited to the shape shown in the drawings, and may have a hole instead of a notch, for example. Further, an O-ring or the like may be interposed at the fitting portion between the valve body 18.32 and the sheath body 13. Incidentally, it is also possible to provide a mark or the like for the operation position of the lever 19 corresponding to the water supply state, etc., so that the setting state can be easily understood. Further, the base side of the lever 19 is pressed from one side to the other side in the longitudinal direction of the window 20 (in the axial direction of the sheath body 13) using a spring or the like, and the lever 19 is pressed in response to the water supply state, etc. It is also possible to provide a recess on the other side of the window 20 at the position where the window 19 is set to facilitate the setting. Also, by doing this, it is less likely that the device will be moved inadvertently from the set position. Although each of the above embodiments shows an example used as a resectoscope, the present invention is not limited thereto, and is generally used as a guide member when a rigid endoscope is inserted into a body cavity. It can be widely used for sheaths. Note that the present invention is not limited to a case in which the sheath insertion pipe 12 and the sheath body 13 are installed in a straight line, but can be similarly applied to a case in which the sheath body 13 is attached to the rear end of the sheath insertion pipe 12 in an oblique direction. . [Effects of the Invention] As described above, according to the present invention, a valve body that fits into the inner wall surface of the sheath body is provided, and a lever protruding from the valve body is operated to align the valve body with the shaft of the sheath body. Since water supply, drainage, and water supply and drainage can be stopped simply by moving the lever in the same direction, the lever can be operated without interfering with the protruding water supply or drainage port depending on the rotated position of the lever in the conventional example. You can achieve good things. Moreover, it has a simple structure and can be realized at low cost.

[Brief explanation of drawings]

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure is a side view of the first embodiment with a part cut away, FIG. 2 is a longitudinal cross-sectional view of FIG. 1, and FIG.
Figure 4 is a vertical cross-sectional view of the periphery of the sheath body to show the positional relationship between the valve body, the water supply port, and the drain port in the water supply state, water supply and drainage stopped state, and drainage state when the lever is operated; 6 and 6 relate to the second embodiment of the present invention, FIG. 5 is a partially cutaway side view of the second embodiment, and FIG. 6 is a valve body used in the second embodiment. A perspective view showing the shape, FIGS. 7 and 8 are related to the conventional example, FIG. 7 is a side view showing the conventional example, and FIG.
It is a sectional view taken along the line BB in the figure. 11.31... Rigid endoscope sheath 12... Sheath insertion pipe 13... Sheath body 16... Water supply port 17...
Drain port 18.32...Valve body 19...Lever 20...Window 21...Resect handle - Beast 1

Claims (1)

[Scope of Claims] An insertion pipe that can be inserted into a body cavity, and a hollow space provided with a water inlet for sending perfusion fluid into the body cavity through the hollow part of the insertion pipe, and a drainage port for discharging the perfusion fluid. A rigid endoscope comprising: a sheath body; A rigid endoscope sheath characterized by being provided with an operating lever that penetrates a window provided in the outer wall and projects onto the outer wall surface of the sheath body.