JP2000060883A - Posture fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a posture fixing device capable of surely and easily deciding the normal posture of a jig for operation such as a mortar cup holder by enabling accurate fixation suited to the physique of a patient and the confirmation/display of a pelvis angle. SOLUTION: This posture fixing device 1 for fixing a patient in a lateral position on an operation base is provided with a base plate 3 loaded on the operation base a back surface waist abutting plate 6 attached to the base plate and abutted through a cushion material to the back surface waist part of the patient and a pair of upper and lower abdominal surface waist abutting plates 7 and 8 similarly abutted through the cushion material to the both left and right abdominal surface waist parts of the patient. A marker 10 for X-ray transmission photographing is respectively fixed to the center position of the upper side abdominal surface waist abutting plate and the lower side abdominal surface waist abutting plate and a supporting plate 11 for supporting the both abdominal surface waist abutting plates is turnably provided so as to be swung in the range of an acute angle respectively in the left and right directions to an upright reference position within a plane including the supporting plate. Also, an angle indicator 12 is attached to the upper end part of the supporting plate 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body position fixator for fixing a patient in a lateral decubitus position (lateral position) on an operating table when a hip joint operation is performed.

[0002]

2. Description of the Related Art In the case of hip joint disease, it is common practice to surgically fix the artificial hip joint to the acetabular recess (acetabular) of the acetabulum in the pelvis of the patient. The acetabular cup holder 39, which is a surgical jig shown in FIG. 9, is exclusively used for embedding / fixing in a predetermined place. At that time, the patient is often operated in a lateral position on the operating table, and therefore, the abdominal side and the back side are paired up with a pair of upper and lower abdominal lumbar support plates and a back support plate in a body-positioning device to achieve a bookend-like operation. It will be sandwiched and fixed.

In the case of fixation by such a posture fixer,
The contact surface that sandwiches the patient is an important factor for fixation. It depends on the size of the pelvis depending on the patient.
Since the patient tilts depending on the installation state, among the upper abdominal waist rest plate, the lower abdominal waist rest plate and the rear waist abdomen rest plate, the contact position of the upper abdominal waist rest plate and the lower abdominal waist rest plate is especially This is because it has a great influence on the fixability to the patient and the installation angle when cementing the acetabular cup to the acetabulum.

[0004]

This will be described with reference to FIGS. 9 (a) to 9 (c) which are explanatory views of the mode of artificial hip joint replacement surgery. When the acetabular cup 38 is inserted and fixed with cement, the installation angle line of the acetabular cup 38 uses the straight line 42 connecting the two points of the superior anterior iliac spine 43 of the pelvis as a reference line. That is, the installation angle formed by the flat surface of the acetabular cup 38 with respect to the reference line 42 is 45 ° in the case of a normal body, and if the installation angle is erroneously fixed, the acetabular cup 38 is artificial. It is said that this has an unfavorable effect on the movable region of the hip joint and increases the risk of dislocation.

In the steady state in which the pelvis is not tilted and is in the lying position with the side facing straight, as shown in FIG. 9A, the main axis 40 of the acetabular cup holder 39 is vertical and the handle portion 41 is horizontal. By holding the acetabular cup, the installation angle of the acetabular cup 38 can be inserted and fixed at a normal 45 °. On the other hand, in the unsteady state where the pelvis is tilted,
As shown in (b), it is necessary to incline and hold the acetabular cup holder 39 according to the inclination angle of the reference line 42, but it is not easy to maintain this posture.

Generally, the upper abdominal lumbar support plate 7 and the lower abdominal lumbar support plate 8 in the body position fixer are adjusted in position so that their centers are correctly aligned with the superior anterior iliac spine 43 (FIG. 9).
(See (c)), the patient is fixed. However, in the conventional body position fixator, the distance between the abdominal waist support plates 7 and 8 and the back waist support plate 6 and the distance between the abdominal waist support plates 7 and 8 are fixed. Although it is possible to adjust the interval between the positions, the inclination of the reference line 42 with respect to the vertical direction is difficult to measure accurately, and it is often determined based on the experience of the operator. It was difficult to hold and fix the acetabular cup 38. Also,
Since the patient is covered with a sterile cloth during the operation to expose only the affected area, it is even more difficult for the operator to determine the above-mentioned cup setting angle. In addition, the position of the cup may change when the patient's leg is moved or pressed during the operation, and fixing the abdomen and dorsal side with a large plate may interfere with the operation even if the fixation is secure. The problem was that there were many obstacles in deciding.

The present invention has been made to solve the above problems, and therefore the object of the present invention is to
Providing a body position fixator that enables accurate and appropriate pelvic angle confirmation according to the patient's body shape and confirmation and display of the pelvic angle so that normal positioning of surgical jigs such as acetabular cup holders can be reliably and easily performed. To do.

[0008]

The present invention has the following constitution in order to achieve the above object. That is, the invention of claim 1 according to the present invention includes a substrate 3 mounted on the operating table 2, a back waist support plate 6 attached to the substrate 3 and brought into contact with the back waist of the patient via the cushion material 9, and also the patient. In the posture fixator 1 for fixing the patient in the lateral decubitus position on the operating table 2, the upper abdominal lumbar support plate is provided with a pair of upper and lower abdominal lumbar support plates 7 and 8 which are brought into contact with the left and right abdominal lumbar regions of the patient via the cushion material 9. 7 and a marker 10 for X-ray radiography are fixed to central positions of the lower abdominal waist support plate 8 and a support plate 11 for supporting both abdominal waist support plates 7 and 8 is in a plane including the support plate 11. In the upright reference position, the angle indicator 12 is attached to the upper end of the support plate 11, while the angle indicator 12 is attached to the upper end of the support plate 11. , Fine adjustment for the swing angle of the support plate 11 In order to operate the main body 13 of the indicator 12 in the left-right direction with respect to the upright reference position within a range of acute angles, as a pointing rod that determines the posture of the acetabular cup holder for artificial hip joint surgery. A vertical axis 15 and a horizontal axis 16 are additionally provided.

Further, in the invention of claim 2 according to the present invention, with respect to the invention of claim 1, the support plate 11 has a lower end portion pivotally supported by a support shaft 18 supporting the lower abdominal lumbar support plate 8. The upper abdominal lumbar support plate 7 is rotatably erected on the substrate 3 so as to be swingable in the range of an acute angle of about 30 ° with respect to the upright reference position, and the upper abdominal waist support plate 7 is supported on the upper end portion of the support plate 11. Axis 17
The angle indicator 12 is attached via the rotatably movable central axis so that the angle indicator 12 can oscillate within a range of an acute angle of about 20 ° with respect to the fixed portion 14 locked to the support plate 11 and the upright reference position. A main body portion 13 is attached to the fixing portion 14 via 19, and the main body portion 13 is attached to the support plate 11 so as to swing in a plane including the support plate 11. .

Further, the invention of claim 3 according to the present invention relates to the invention of claim 2, wherein when the main body 13 of the angle indicator 12 attached to the support plate 11 is in the upright reference position, The shaft 15 extends vertically upward and is projected, and the horizontal shaft 16
However, it is characterized by being provided so as to extend horizontally orthogonal to both the central axis 19 and the vertical axis 15 of the fixed portion 14.

The invention of claim 4 according to the present invention relates to the invention of claim 2 or 3, wherein the lower abdominal lumbar support plate 8 is provided.
However, in order to adjust the distance to the substrate 3, it is provided so as to be movable a little longer in the vertical direction.

The invention of claim 5 according to the present invention relates to the invention of claim 2, 3 or 4, wherein the upper abdominal waist support plate 7 adjusts the distance from the lower abdominal waist support plate 8. Is provided so that it can be moved a little longer in the longitudinal direction of the support plate 11.

Further, the invention of claim 6 according to the present invention relates to the invention of claim 2, 3, 4 or 5, wherein the angle indicator 12 displays the horizontal swing angle of the main body portion 13 with respect to the fixed portion 14. The angle correction scale 20 is provided on the side surface portion.

Further, the invention of claim 7 according to the present invention relates to the invention of claim 2, 3, 4, 5 or 6, wherein the fixing portion 14 of the angle indicator 12 is arranged with respect to the upper end portion of the support plate 11. It is characterized in that it is formed in a concavo-convex fitting structure that can be attached and detached only in a coaxial relationship at a fixed position.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. Figure 1
[Fig. 2] is a schematic perspective view of a body position fixator 1 according to an embodiment of the present invention. 2 to 4 show the body position fixator 1 shown in FIG.
FIG. 4 is a front view, a plan view, and a partially omitted right side view.

With reference to FIGS. 1 to 4, a body position fixer 1 according to an embodiment of the present invention is a substrate 3 mounted on an operating table 2 and a cushioning material attached to the substrate 3 on the back waist of a patient. A back waist support plate 6 to be abutted via 9, and a pair of upper and lower abdominal waist support plates 7 and 8 which are also abutted to the left and right abdominal waist of the patient via a cushion material 9, both abdominal waist support plates 7 , A supporting plate 11 for rotatably supporting 8
An angle indicator 12 detachably attached to the support plate 11 is provided as a component member, and is formed into an instrument for fixing the lumbar region of the patient in the lateral recumbent position on the operating table 2.

The substrate 3 is formed of a metal rectangular plate, and a back angle member 4 and an abdominal angle member 5 made of a light metal such as aluminum or a hard synthetic resin are attached to the left and right ends on the longitudinal side by screwing or the like. It is fixed. Both angle members 4 and 5 are composed of a horizontal plate portion and a vertical plate portion that are bent at a right angle, and the horizontal plate portion is fixed on the substrate 3 as described above. A round hole is formed in the vertically rising vertical plate portion of the back angle member 4 at a position slightly above the midpoint of the vertical center line, while the vertically rising vertical plate portion of the abdominal surface angle member 5 includes: A vertically long elongated hole (not shown) is formed along the central portion of the vertical center line, and an arcuate elongated hole 26 is formed along the upper edge portion. This arc long hole 26
Is provided along a partial arc whose center angle on a circle centered on the lower end portion of the vertically long elongated hole forms an acute angle, for example, 60 °.

The back waist support plate 6 is formed of a metal or hard synthetic resin having a small specific gravity such as aluminum into a substantially square plate body, and is fixed to the back angle member 4 by a set screw 21 inserted through the round hole. , And can be brought into contact with the back waist of the patient via the cushion material 9 shown by the thin line.

The upper and lower abdominal lumbar support plates 7 and 8 are made of a metal having a small specific gravity such as aluminum or a hard synthetic resin like the rear lumbar support plate 6, and are substantially square plates smaller than the rear lumbar support plate 6. The support shafts 17 and 18 are integrally projectingly provided on the rear surface side central portion. The lower abdominal lumbar support plate 8 adjusts the distance between the lower abdominal lumbar support plate 8 and the substrate 3 by coaxially screwing the support shaft 18 to the set screw 23 inserted in the elongated hole of the abdominal surface angle member 5. However, it can be fixed at a position adapted to the patient's body shape, and can be brought into contact with, for example, the right lateral abdominal lumbar region of the patient via the cushion material 9 shown by a thin line.

On the other hand, the upper abdominal lumbar support plate 7 is provided with an elongated hole 25, which will be described later, provided near the upper end of the support plate 11 which is erected upright along the lower end of the abdominal angle member 5.
It is fixed by coaxially screwing the support shaft 17 to the set screw 22 inserted through the above, and can be brought into contact with, for example, the left lateral abdominal surface of the patient via the cushion material 9 shown by a thin wire.

The support plate 11 is a vertically elongated plate made of a metal having a small specific gravity such as aluminum or a hard synthetic resin, and a round hole into which the set screw 23 is inserted at the lower end of the vertical center line (see FIG. (Not shown), an elongated hole 24 is formed in the middle of the vertical centerline along the vertical centerline, and an elongated hole 24 is formed in the upper center of the vertical centerline along the vertical centerline. The hole 25 is opened.

The lower half of the support plate 11 is aligned with the abdominal surface angle member 5 in a state where the lower abdominal surface lumbar support plate 8 is not attached, and the set screw 23 is attached to the elongated hole of the abdominal surface angle member 5. After being inserted into the round hole of the support plate 11, the set screw 23 and the support shaft 18 of the lower abdominal lumbar support plate 8 are coaxially screwed, while the elongated hole 24 and the arcuate hole 26 are overlapped with each other. The pin 27 is inserted and attached to the abdominal surface angle member 5. Support plate 11 assembled in this way
Is in a state where the lower half portion thereof is faced to the abdominal surface angle member 5 and is pivotally supported by the support shaft 18,
Upright reference position with the support shaft 18 as the center of rotation (see FIG. 1)
On the other hand, it is provided such that it can swing in the left-right direction within an acute angle range of about 30 ° and can be fixed at any position.

Upper abdominal waist support plate 7 and lower abdominal waist support plate 8
A marker 10 for X-ray transmission imaging is fixed to each of and. The marker 10 is made of a metal such as lead that is difficult to transmit X-rays, is formed into a small-diameter disk with a diameter of about several mm, and is embedded and attached at the center of the front surface of each waist support plate 7, 8. Are fixed by each. The function of the marker 10 will be described later.

5 to 7, the angle indicator 12 of the body position fixator 1 is shown in a front view, a right side view and a rear view. With reference to FIGS. 1 and 5 to 7, the angle indicator 1
2 includes a body portion 13 and a fixing portion 14, and is detachably attached to the upper end portion of the support plate 11 via the fixing portion 14 so as to be attached only in a coaxial relationship at a predetermined position.

The fixing portion 14 has a groove-shaped steel shape, for example, an engaging portion 28 formed by matching the lateral width with the support plate 11,
An upright plate portion 29 having a flat plate shape is provided uprightly and integrally on the engaging portion 28, and the engaging portion 28 is screwed into a screw hole screwed at the center of one side surface thereof. Push screw 31
And a wedge piece 30 loosely engaged with the tip portion of the screw 31, while the standing plate portion 29 has a shaft hole penetrating the center portion thereof and a screw hole provided below the shaft hole. And a zero point 35 provided at the lower center as a reference point of the angle correction scale 20.
With.

The main body portion 13 has a shape similar to an edge frame having a concave portion which can be fitted into the standing plate portion 29 in a concave-convex relation, and has a shaft hole of the standing plate portion 29 in the central portion. A shaft hole is formed by penetrating from the plate surface side at a corresponding position, and a circular arc hole having the shaft hole as a radial center at a position corresponding to the screw hole of the standing plate portion 29 at the center of one side surface. 33 is opened, and a graduation portion 36 that forms the angle correction graduation 20 by the zero point 35 is carved on the lower arc side portion.

The main body 13 further includes a vertical axis 15 and a horizontal axis 16 as an indicator rod for determining the posture of the acetabular cup holder for artificial hip joint surgery. Referring to FIG. 5, the vertical axis 15 is in the direction of extension of the vertical center line of the main body 13,
That is, the main body 13 is vertically extended and projected in a state where the main body 13 is set in the upright reference position, and the horizontal axis 16 is orthogonal to both the axial hole provided in the main body 13 and the vertical axis 15. It extends horizontally and projects. The horizontal axis 16 is
As shown in FIG. 1, the acetabulum is attached so that it can be turned about a vertical axis 15 within a small angle range of an acute angle in a plane including its own axis and orthogonal to the vertical axis 15. In the case of artificial hip joint surgery using the cup holder 39, it is preferable because it is convenient to adjust the front opening angle with respect to the acetabular cup 38.

The body portion 13 and the fixed portion 1 having the above-mentioned structure
4 means to cover the standing plate portion 29 of the fixed portion 14 with the main body portion 13,
The central shaft 19 made of, for example, a pin is fitted into the shaft hole of the main body portion 13 and the shaft hole of the standing plate portion 29 centered on the shaft hole and is prevented from coming off, and the set screw 34 is inserted through the arc hole 33 into the standing plate portion. 29
It is assembled by screwing it into the screw hole. The angle indicator 12 is formed by assembling the main body 13 and the fixed portion 14 with the central shaft 19 and the set screw 34 in this manner.

The angle indicator 12 is based on the state shown in FIG. 5 in which the longitudinal centerlines of the main body 13 and the fixed portion 14 are aligned, that is, the state where the main body 13 is set to the upright reference position. As a point, the main body portion 13 can be swung in the left-right direction with respect to the fixed portion 14 within an acute angle range of about 20 °, respectively, and by tightening the set screw 34, the main body portion 13 can be swung at an arbitrary swing angle position. Can be fixed. The allowable swing angle in this case is determined according to the relationship between the circular arc hole 33 and the set screw 34, and the fixed portion 1
The swing angle of the main body portion 13 with respect to 4 can be recognized by visually observing the display of the angle correction scale 20 including the zero point 35 and the scale portion 36.

Such an angle indicator 12 is shown in FIGS.
As shown in FIG. 7 to FIG. 7, it is attached to the upper end of the support plate 11. In this attachment, the push screw 31 is loosened, the engaging portion 28 of the main body 13 is fitted into the upper end portion of the support plate 11 from above, and the push screw 31 is tightened with the lateral width aligned with the support plate 11. By wedge-fitting the wedge piece 30 at the tip end into the V groove 32 provided in the side surface of the support plate 11,
The engaging portion 28 is fixed to the upper end portion of the support plate 11, and thus, the vertical center line of the fixing portion 14 of the angle indicator 12 is aligned with the vertical center line of the support plate 11. It will be securely fixed in place.

Various means are conceivable so that the angle indicator 12 can be attached only to the upper end portion of the support plate 11 in a coaxial relationship at a fixed position. For example, the support plate 1
1 is provided with a V groove 32 having a lateral width of an appropriate size, and a small protrusion 37 is provided on a side surface on the opposite side of the V groove 32. In addition to adopting a fitting engagement structure having a shape corresponding to 32, a hole into which the small projection 37 can be fitted is formed at a position corresponding to the small projection 37 on the side surface of the engaging portion 28. As a result, the attachment to the fixed position can be performed reliably and easily by only simple operations of fitting and screwing. In addition,
The members designated by the reference numeral 44 in FIGS. 1, 2 and 6 are angle indicating rods, and are provided as necessary.

Next, regarding the aspect of the operation of the artificial hip joint performed using the body position fixator 1 according to the embodiment of the present invention,
This will be described below with reference to FIGS. 1 to 7 and FIG. 8 which is an explanatory view of the deviation angle correction in the body position fixator.

The lumbar region of the patient in the lateral recumbent position is fixed on the operating table 2 by the posture fixing device 1 according to the present invention. In this case, the angle indicator 12 is removed, the height of the lower abdominal waist support plate 8 is adjusted with respect to the substrate 3, and the upper abdominal waist support plate 7 /
Lower abdominal lumbar support plate 8 Adjusts the spacing and supports plate 1
The tilt angle adjustment of No. 1 is performed, and the upper ventral lumbar support plate 7 and the lower ventral lumbar support plate 8 are aligned so that the respective center points thereof match the upper anterior iliac spines 43 of the pelvis, and then the cushion material. The patient is fixed by interposing 9 respectively. After this fixation is completed, a sterilization sheet (not shown) is hung on the patient and the body position fixator 1, and only the portion of the sheet corresponding to the surgical site is opened.

The support plate 1 is provided with the angle indicator 12 which is set at the upright reference position with the sterilized sheet hanging thereon.
Attach to the upper end of 1. At the time of this attachment, since it is formed so that it can be attached only in a coaxial relationship at a fixed position, the attachment position will not be misaligned. Then the X of the patient's pelvis
Fluoroscopic imaging is performed from the back side of the waist. Looking at the X-ray photograph after the radiographing, it is supposed that the position of each marker 10 for X-ray radiography on both the abdominal lumbar support plates 7 and 8 and the position of both superior anterior iliac spines 43 should match. As shown in FIG. 8, if it is deviated by a slight angle θ, the angle indicator 12
The main body 13 is tilted in the same direction with reference to the angle correction scale 20 by the angle θ to perform the angle correction.

When the angle correction is completed as described above, the practitioner subsequently uses the acetabular cup holder 39 to embed and fix the acetabular cup 38 in the acetabular cup. At that time, the acetabular cup holder 39 must be held in the correct posture as described above.
Since the angle is corrected by 2, the main body 13
Since the vertical axis 15 is held parallel to the reference line 42, and the horizontal axis 16 is held at a right angle to the reference line 42 and the vertical axis 15, these two axes 15 and 16 are used as indicator rods. The posture of the acetabular cup holder 39 may be visually determined so that the main shaft 40 and the handle portion 41 are in the same direction, and the acetabular cup holder 39 can be held in the correct posture by such a simple operation. . Thus, even in a situation where only the affected part is exposed and visibility is poor, it is possible to easily and surely perform the operation of the artificial joint while accurately determining the cup installation angle.

[0036]

The present invention is carried out in the form as described above, and has the following effects.

According to the present invention, since the inclination angles of the upper abdominal waist support plate and the lower abdominal waist support plate with respect to the upright reference position can be adjusted, the fixation to the pelvis is improved. In addition, since the function of adjusting the height of the abdominal lumbar support plate from the substrate is added, the fixing performance is dramatically improved. Further, by providing a marker for X-ray transmission imaging on the abdominal lumbar support plates, it is possible to confirm the installation angle of the abdominal lumbar support plates by X-ray, and a surgical jig such as an acetabular cup holder. The posture can be determined rationally, and since the angle indicator is provided, the posture can be determined more accurately and easily, so that the operation time can be shortened. Also, the error of the installation angle with respect to the acetabular cup can be eliminated or greatly reduced,
As a result, the range of motion of the artificial hip joint can be optimized and dislocation can be prevented, and highly reliable surgery can be realized.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a body position fixator 1 according to an embodiment of the present invention.

FIG. 2 is a front view of the body position fixator 1 shown in FIG.

3 is a plan view of the body position fixator 1 shown in FIG. 1. FIG.

FIG. 4 is a right side view showing a part of the body position fixator 1 shown in FIG.

5 is an angle indicator 1 in the body position fixator 1 shown in FIG.
2 is a front view of FIG.

6 is a right side view of the angle indicator 12 shown in FIG.

7 is a rear view of the angle indicator 12 shown in FIG.

FIG. 8 is an explanatory diagram of a deviation angle correction in the body position fixator 1 shown in FIG. 1.

FIG. 9 is an explanatory view of a pelvis holding portion fixed by a body position fixator, (a) is a perspective front view in the case where the pelvis is not tilted, (b)
Is a perspective front view in the case where the pelvis is tilted, and (c) is a cross-sectional view.

[Explanation of symbols]

1 ... Posture fixator 2 ... Operating table 3 ... Substrate 4 ... Back angle member 5 ... Ventral angle member 6 ... Back waist support plate 7 ... Upper ventral waist support plate 8 ... Lower ventral waist support plate 9 ... Cushion material 10 ... Marker 11 ... Support plate 12 ...
Angle indicator 13 ... Main body 14 ... Fixed portion 15 ...
Vertical axis 16 ... Horizontal axis 17 ... Spindle 18 ...
Spindle 19 ... Central axis 20 ... Angle correction scale 21 ...
Set screw 22 ... Set screw 23 ... Set screw 24 ...
Slots 25 ... Slots 26 ... Arc slots 27 ...
Pin 28 ... Engaging portion 29 ... Standing plate portion 30 ...
Wedge piece 31 ... Push screw 32 ... V groove 33 ...
Arc hole 34 ... Set screw 35 ... Zero point 36 ...
Scale 37 ... Small protrusion 38 ... Mortar cup 39 ...
Mortar cup holder 40 ... Spindle 41 ... Handle 42 ...
Reference line 43 ... Superior anterior iliac spine 44 ... Angle indicator rod

Continued front page    (72) Inventor Kenji Doi             1-3-18 Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo               Kobe Steel, Ltd. Kobe Head Office F-term (reference) 4C097 AA04 BB09 MM07 MM09                 4C341 MM04 MN20 MS11

Claims (7)

[Claims] 1. A substrate to be mounted on an operating table, a back lumbar support plate attached to the substrate and abutting against a back waist of a patient via a cushion material, and also abutting both left and right abdominal waist of the patient via a cushion material. In a position-fixing device that includes a pair of upper and lower abdominal lumbar support plates for fixing a patient in a lateral decubitus position on the operating table, an X-ray radiographic imaging is performed at the center position of the upper abdominal waist support plate and the lower abdominal waist support plate. Markers are fixed to each other, and a support plate that supports the abdominal lumbar support plates is rotatably provided in a plane including the support plates so as to be swingable in the range of acute angles in the left-right direction with respect to the upright reference position. On the other hand, an angle indicator is attached to the upper end portion of the support plate, and the angle indicator has the main body of the indicator set at the upright reference position for fine adjustment with respect to the swing angle of the support plate. On the contrary, sharp in the left and right directions A posture fixing device comprising a swinging means for swinging within an angular range, and a vertical axis and a horizontal axis as an indicator rod for determining the posture of an acetabular cup holder for artificial hip joint surgery. 2. The support plate can swing in a range of acute angles of about 30 ° with respect to an upright reference position in the left-right direction with a lower end portion pivotally supported by a support shaft that supports a lower abdominal waist support plate. The upper abdominal waist support plate is rotatably erected on the substrate,
An angle indicator is attached to a portion near the upper end of the support plate via a support shaft, and an angle indicator oscillates in the range of an acute angle of about 20 ° to the left and right with respect to a fixed portion to be locked to the support plate and an upright reference position. A main body part that is rotatably attached to the fixed part via a central shaft, and is attached to the support plate so as to swing the main body part in a plane including the support plate. The position-fixing device according to Item 1. 3. When the main body of the angle indicator attached to the support plate is in the state of the upright reference position, the vertical axis extends vertically upward and is projected, and the horizontal axis is the fixing portion. The body position fixer according to claim 2, wherein the body position fixator is provided so as to extend horizontally and orthogonal to both the central axis and the vertical axis. 4. The postural fixator according to claim 2, wherein the lower abdominal lumbar support plate is movably provided in the vertical direction so as to adjust a distance from the substrate. 5. The method according to claim 2, 3 or 4, wherein the upper abdominal waist support plate is movably provided in the longitudinal direction of the support plate for adjusting the distance from the lower abdominal waist support plate. Posture fixator. 6. The posture fixing device according to claim 2, 3, 4 or 5, wherein the angle indicator is provided with an angle correction graduation on a side surface portion for displaying a lateral swing angle of the main body portion with respect to the fixing portion. 7. The fixing portion of the angle indicator is formed in a concave-convex fitting structure that can be attached and detached only in a coaxial relationship at a fixed position with respect to the upper end portion of the support plate. 3,
The position fixator according to 4, 5, or 6.