JPH10277043A - Retractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retractor capable of surely securing illumination light to an operation field and improving the operability of an operation. SOLUTION: This retractor 20 is provided with a holding part 21 to be held with a hand by a user and a muscle hook head 22 composed by incorporating a spatula-like muscle hook member 33 in a projection state and freely attachably and detachably attached to the holding part 21 and is formed by incorporating a light guide 34 for leading the emitted light of a light source 24 by the power of a power source 23 incorporated in the holding part 21 or the muscle hook head 22 to an emitting end 39 arranged near the projected tip 33b from the muscle hook head 22 of the muscle hook member 33 and emitting it in the muscle hook head 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractor and, more particularly, to a retractor used in a surgical operation on the oral cavity, nasal cavity, maxilla, orbit, and maxillofacial surface.

[0002]

2. Description of the Related Art In surgical operations on the oral cavity, nasal cavity, maxilla, orbit, and maxillofacial region, the surgical field is often deep and narrow, and it is desired to secure the workability by illuminating the surgical field with a lighting device. There was a request. FIG. 3 shows an example of a retractor proposed in view of the above demand. In FIG.
The retractor 1 includes an elongated retractor main body 3 having a grip portion 2 gripped by a user at one end, and an L-shaped blade 4 detachably attached to the retractor main body 3 by a locking means (not shown). Have. The retractor main body 3 includes an illuminating portion 5 that bends in an L shape from a tip protruding from the grip portion 2 and irradiates illumination light in a projecting direction of the tip 4 a of the blade 4 attached to the retractor main body 3. ing. The lighting unit 5 includes the retractor 1
The illumination light emitted from the separate light source 6 is guided from the connection optical cable 10 to the emission end 8 via the optical cable 7 built in the retractor main body 3 to form the blade tip 4a.
The light is emitted in the direction of projection. Therefore, in the retractor 1, the illuminating light of the illuminating unit 5 is applied to the operating field where the blade tip 4a is inserted and pushed open, so that the operability of the operation is ensured. Note that the connection optical cable 10 is optically connected to the optical cable 7 by connecting to the connection port 9 provided on the grip portion 2.

[0003]

By the way, in the case of the retractor 1 described above, (1) if the size is changed by replacing the blade 4, the emission end 8 of the illumination section 5 and the blade tip 4a
When the large blade 4 is attached, the emission end 8 may be far from the blade tip 4a and the illumination light may be insufficient. (2) The connection cable 10 is operated And (3) it takes much time to sterilize the connection port 9 and the connection optical cable 10.

The present invention has been made in view of the above-mentioned problems, and provides a retractor that achieves the following objects. (A) Since a hook head incorporating a hook member and a light guide is employed, the distance between the tip of the hook member protruding from the hook head and the emission end of the light guide is appropriately set in advance. can do. (B) According to (a), the hook member of the target size and the illumination can be easily obtained simply by attaching / detaching the hook head to / from the gripping portion and replacing it. (C) The configuration in which the power supply is incorporated in the gripping portion enables the light source of the light guide to be incorporated in either the gripping portion or the crook head, eliminating the need for the conventional optical cable for connection, thereby improving the workability of the operation. Is improved. (D) Since an optical cable for connection or the like is not required, the whole can be easily sterilized.

[0005]

According to the present invention, there is provided a grip portion which is gripped by a user's hand, and a hook portion which is provided with a spatula-shaped hook member in a protruding state and which is detachably attached to the grip portion. A light guide that guides and emits light emitted from a light source by the power of a power supply incorporated in the grip portion or the hook head to an emission end disposed near a protruding tip of the hook member from the hook head. The incorporation into the hook head is a means for solving the above problem. In the present invention, the illuminating light emitted from the emission end of the light guide is applied to the operative field, thereby ensuring workability in the operative field. As the light guide, various optical waveguides other than optical fibers and optical cables can be used. In particular, it is preferable in terms of cost to employ a small-diameter optical fiber or optical cable, and furthermore, the size in the vicinity of the emission end can be reduced, and the operability of the operation can be further improved. As a light source,
Although various configurations such as a halogen bulb and a semiconductor laser can be employed, it is more preferable to employ a so-called cold light source which does not particularly affect heat generation. As a result, inconveniences such as heat generation of the optical fiber and the like can be avoided. In addition, the arrangement position of the light source may be any of the grip portion and the hook head, and when the light source is on the grip portion side, a light guide is installed between the grip portion and the hook head, and the light guide is on the hook head side. In some cases, conductive means for guiding the electric power of the power source on the gripping portion side to the hook head side is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a retractor according to the present invention will be described below with reference to FIGS. 1 (a), 1 (b) and 2. FIG. 1A and 1B, the retractor 20 includes a grip portion 21 having a slender columnar appearance that is gripped by a user's hand, and one end 21 a in the longitudinal direction of the grip portion 21 (hereinafter, “one end of the grip portion”). ) And the hook head 22 which is attached to and detached from the bracket 27.

[0007] A power source (dry cell) 23,
A light source (halogen bulb) 24 that emits light by the power of the power supply 23 is built in. In FIG. 1, two lithium dry batteries having an output voltage of 6 volts are connected in series as the power supply 23, but other configurations such as an alkaline button battery and a battery using an electrolytic solution can be adopted. Dry cell 23
When the openable and closable screw lid 25 screwed to the other end 21b in the longitudinal direction of the grip portion 21 is opened, it can be freely taken out and inserted into the grip portion 21. The light source 24
It is installed near one end 21a of the gripping portion. In FIG. 1, this light source 24 is a 6 volt halogen bulb,
Various configurations such as a semiconductor laser can be adopted. The turning on and off of the light source 24 can be easily switched by a hand switch 26 installed outside the grip 21.

The bracket 27 is provided with a pair of flanges 28, 28 protruding from the one end 21a of the holding portion so as to be spaced apart from each other.
And an engagement shaft 2 erected between these flanges 28, 28.
9 and a pair of locking balls 32, 32 disposed on the inner surfaces 28a, 28a side of both flanges 28, 28 to face each other. The locking balls 32, 32 are each urged by a spring 32a.

The hook head 22 includes a head body 31, a hook member 33, and a light guide. The head main body 31 is in the form of a metal block, and opposing side surfaces 31a, 31a are formed on inner surfaces 28a of both flanges 28, 28,
It is inserted between the flanges 28, 28 along 28a.
On both sides 31a, 31a, the locking ball 3
Locking concave portions 35, 35 with which the second and the second are engaged are formed. Further, the head main body 31 has an engagement groove 36 which is engaged with the engagement shaft 29 so as to be freely detachable. This engagement groove 36
Is elongated and formed with an axis perpendicular to the side surfaces 31a, 31a. When the engagement groove 36 is engaged with the engagement shaft 29, the hook head 22 becomes rotatable about the engagement shaft 29. A positioning projection 36a is provided in the engagement groove 36 to protrude therefrom. When the engagement groove 36 is engaged with the engagement shaft 29, the engagement shaft 2
9 and the positioning protrusion 36
The engagement of “a” positions the head main body 31 with respect to the bracket 27.

The hook member 33 is made of a material having sufficient rigidity such as metal and has an elongated spatula shape, and is cantilevered by fixing the container end 33a to the head main body 31. As shown in FIG. 2, the hook member 33 has a tapered shape in which the width dimension t becomes narrower toward the tip 33b, and furthermore, as shown in FIG. It has a curved hook surface 33c. As shown in FIG. 2, the hook member 33 inserted into the surgical field F is
Since the operative field F is spread using the 3c, there is no fear of damaging the vicinity of the operative field F due to the curved hook surface 33c.

In FIG. 1A, a light guide 34 is an optical fiber. The light guide 34 penetrates the head main body 31 from a light receiving attachment 37 projecting from the lower end of the head main body 31 (the lower side in FIG. 1A). It is wired near the member tip 33b. The light guide 34 projecting upward from the head main body 31 passes through the insertion tube 38 fixed in the concave portion 33d of the hook member 33 facing the hook surface 33c and reaches near the tip 33b of the hook member 33. I'm sorry. At the tip of the light guide 34 in the vicinity of the tip 33b of the hook member, an emission end 39 for radially emitting the transmission light in the light guide 34 is provided.
It has. The light emitting end 39 can be easily obtained by processing the tip of the light guide 34, which is an optical fiber, into a target shape, or by incorporating an optical component different from the light guide 34. Further, since the insertion tube 38 can be made as thin as substantially the same as the outer shape of the light guide 34 which is an optical fiber, the insertion tube 38 is almost entirely accommodated in the recess 33d, and extends outside the recess 33d. The projecting dimension of the insertion tube 38 can be extremely small. Thus, the light guide 34 and the insertion tube 38 do not hinder the user (operator) from viewing the operation portion F. The emission end 39 is disposed at a position slightly retracted from the insertion tube tip 38a toward the back. As shown in FIG. 2, the light emitted from the emission end 39 is emitted to a certain area within the range of the opening of the insertion tube tip 38a. The insertion tube tip 38a preferably has a reflective inner surface. In this case, since the light emitted from the emission end 39 is emitted after being reflected within the insertion tube tip 38a, the light can be emitted stably to the intended emission area.

As shown in FIGS. 1A and 1B, the light receiving attachment 37 is cylindrical, and
When the light source 24 is mounted on the grip portion 21, the light source 24 is inserted into the light guide tube 21 c protruding from the bracket 27 and guides the light emitted from the light source 24 to the light guide 34. The inner surface of the light receiving attachment 37 is a reflection surface, and the light emitted from the light source 24 is efficiently guided to the end of the light guide 34 connected to the light receiving attachment 37 with almost no attenuation.

In this retractor 20, the hook head 22 is mounted on the bracket 27 of the grip portion 21 for use.
At this time, the hook head 22 is attached to the engagement shaft 29 of the bracket 27.
The engaging groove 36 is engaged with the engaging ball 32 and the engaging recess 3 is
5 and the positioning projections 36 are further formed in the locking recesses 29a.
a, the hook head 22 is firmly fixed to the grip portion 21 unless the engaging groove 36 is forcibly pulled out from the engaging shaft 29.

When the hook head 22 attached to the bracket 27 is replaced, the hook head 22 having the hook member 33 of the target size suitable for the size and shape of the surgical field F can be easily selected and used. Can be. Therefore, in the operating room, a plurality of sizes of the hook heads 22 are prepared and placed in advance, but all the hook heads 22 are positioned at an appropriate distance near the tip 33b of the hook member 3b.
9, the exit end 39 of the light guide 34 is always located at an appropriate distance near the tip 33b of the hook member even if the hook head 22 is exchanged, so that appropriate illumination light for irradiating the surgical field F is ensured. , And workability in the operative field F is improved. Also, all the prepared hook heads 22 are
Since the projecting dimension of the insertion tube 38 from the recess 33d is small and small, the visual field of the user who views the surgical field F can always be ensured.

In the retractor 20, the power supply 2
Since it is cordless due to the configuration in which the grip 3 and the light source 24 are incorporated in the grip portion 21, there are few parts that obstruct the operation like the optical cable 10 for connection of the retractor of the conventional configuration, and the operability of the operation is improved. In addition, since the structure is simple, it is possible to further reduce the overall weight and size, and to obtain effects such as securing a user's view and improving operability. Furthermore, since the number of parts to be sterilized is reduced, cleanliness of the operating environment can be easily ensured. Power supply 23
The fact that both the light source 24 and the light source 24 are built into the grip portion 21 makes it unnecessary to provide a separate light source, so that it is easy to ensure the cleanliness of the entire operation room.

Since the use of the light guide 34 is also suitable for VTR photography and photography of the surgical field F, a connection port for these VTRs and a camera can be provided in the hook 22. It is. The retractor of the present invention is not limited to the above embodiment, and it goes without saying that various design changes are possible.

[0017]

As described above, according to the retractor of the present invention, the following excellent effects can be obtained. (B) By attaching and detaching the hook member incorporating the hook member and the light guide to and from the gripping portion, the emission end of the light guide is always positioned near the tip of the hook member projecting from the hook head. As a result, the operation field can be stably illuminated according to the size of the hook member, so that the operability of the operation is improved. (B) By simply attaching and detaching the hook member having both the hook member and the light guide to and from the gripper and replacing it, the hook member of the desired size and the illumination can be easily obtained. (C) The configuration in which the power source of the light source is incorporated in the gripping portion allows the light source of the light guide to be incorporated in either the gripping portion or the hook head, eliminating the need for the conventional optical cable for connection. Workability is improved. (D) According to the above (c), sterilization of the whole becomes easy by omitting the connection optical cable and the like. (E) According to the above (c), downsizing and simplification of the structure can be achieved, and the cost can be reduced. (F) According to (c), the operability is improved by reducing the size and weight, omitting the connection optical cable, and the like. In addition, the operability of the operation is improved by omitting the connection optical cable which has conventionally hindered the operation.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a retractor of the present invention, wherein (a) is an exploded front view and (b) is a side view of (a).

FIG. 2 is a perspective view showing an operation of the retractor of the present invention, showing a state where the retractor is inserted into an operation field.

FIG. 3 is a perspective view showing a conventional retractor.

[Explanation of symbols]

 Reference Signs List 20 retractor 21 gripping portion 22 hook head 23 power supply 24 light source 33 hook member 33b tip of hook member 34 light guide 39 emission end.

Claims (1)

[Claims] 1. A grip part (21) that is gripped by a user with a hand
And a hook head (22) having a spatula-shaped hook member (33) incorporated in a protruding state and detachably attached to the gripping portion. A power source ( The light emission of the light source (24) by the power of (23) is applied to the tip (33) of the hook member protruding from the hook head.
b) A retractor (20) characterized in that a light guide (34) that guides and emits light to an emission end (39) arranged in the vicinity is incorporated into the hook head.