Operating table used for total hip replacement surgery and method of use thereof

Abstract

To provide a surgical table and a method of use thereof for an anterior-medial approach method used in total hip arthroplasty (THA) for replacing a hip joint with an artificial joint, which can preserve the joint capsule on the lateral or posterior side of the hip joint and thereby reduce the risk of hip dislocation after total hip arthroplasty.SOLUTION: A surgical table and a method of use thereof are provided in which: a patient is placed in a supine position on the upper surface of the surgical table; the lower limb is raised upward at 80 to 100 degrees, and abducted laterally at 80 to 100 degrees; knee is flexed at 80 to 100 degrees and fixed in this state; and, by cutting the pectineus muscle and fixing the lower limb in a laterally abducted state at 80 to 100 degrees, the operator is enabled to approach the hip joint of the patient, whose lower limb is widely spread, from the anterior-medial side.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an operating table used for total hip arthroplasty surgery and a method of using the same. More specifically, the present invention relates to an operating table used for total hip arthroplasty surgery by an anterior medial approach method that approaches the hip joint from the anterior medial side of the body to the hip joint of a patient and a method of using the same.

Background Art

[0002] In recent years, it is said that more than 70,000 patients with hip joint pain each year are damaged by diseases such as trauma, osteoarthritis, and femoral head necrosis, and the function of the hip joint with reduced function and increased pain is restored and the pain is relieved. It is said that they undergo total hip arthroplasty (THA).

[0003] Here, the human hip joint is a joint in which a spherical femoral head formed at the tip of the femoral neck, which is bent upward and inward from the proximal part of the femoral shaft, is rotatably inserted into a cup-shaped acetabulum that opens slightly downward and slightly forward on the outer side of the pelvis, and the whole is surrounded by an articular capsule (see FIG. 10).

[0004] Total hip arthroplasty (THA) is a surgery that aims to restore the function of the hip joint and relieve pain by excising the damaged hip joint by surgical / orthopedic techniques, replacing the spherical femoral head of the femur with a spherical metal or ceramic, and replacing the cup-shaped acetabulum of the pelvis with a cup covered with a polymer resin such as polyethylene to form an artificial joint (implant) without nerves and inserting it into the hip joint.

[0005] By the way, total hip arthroplasty surgery can be roughly classified into an anterior approach method that reaches from the front side of the body when the head direction of the patient's hip joint is upward (the same applies hereinafter unless otherwise specified with respect to the body direction) and a lateral approach method that reaches from the side of the body. Among these, the lateral approach method has been widely performed for more than 30 years and is a method with effects and achievements.

[0006] However, the lateral approach involves cutting the joint capsule, ligaments, and gluteal muscles on the lateral or posterior side of the hip joint. As a result, the joint capsule and ligaments remain severed and do not heal after surgery, making the hip joint prone to dislocation to the posterior or lateral side of the body if the patient assumes an unnatural posture after the operation.

[0007] On the other hand, the lumbar region on the front of the body contains a region called the femoral triangle, which is formed by the inguinal ligament, sartorius muscle, and adductor longus muscle. Many organs, such as the femoral vein, femoral artery, lymphatic vessels (femoral ring), femoral nerve, iliopsoas muscle, and lateral femoral cutaneous nerve, are concentrated in this region, making an anterior approach to the hip joint from the front of the patient's body difficult (see, for example, Patent Document 1).

[0008] However, in recent years, rapid advances in X-ray imaging have led to the development of minimally invasive anterior hip replacement surgery (AMIS), which performs total hip replacement surgery through a narrow pathway passing through the spaces between numerous organs on the anterior side of the body under X-ray supervision (see, for example, Patent Document 2). Minimally invasive anterior surgery is said to have advantages such as less postoperative pain and scarring, and a lower incidence of dislocation, because it does not involve cutting muscles and involves small incisions.

[0009] However, AMIS-based total hip replacement surgery has several unresolved issues, including the need for expensive X-ray and analysis equipment, the difficulty of performing a major operation in a narrow surgical field in an area where many organs are concentrated, the fact that it is not applicable to all patients, the inconsistency of surgical outcomes, and the lack of established prognosis. As a result, it has not been able to fully meet the current high demand for total hip replacement surgery. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Special Publication No. 2015-504766 [Patent Document 2] Japanese Patent Publication No. 2020-99696 [Overview of the project] [Problems that the invention aims to solve]

[0011] In this context, the present invention aims to provide an operating table and method for using the same for total hip arthroplasty (THA) using a leg-spreading anterior approach, which involves approaching the patient's hip joint from the anterior medial side of the body. By significantly externally rotating the patient's lower limbs to move the nerves and blood vessels on the anterior side of the patient's hip joint upward, the patient's hip joint is approached from the anterior medial side of the body. This method preserves the joint capsule, ligaments, and gluteal muscles of the hip joint on the posterior or lateral side of the body, which were cut in the conventional lateral approach, thereby reducing the sequelae of the conventional lateral approach, which makes the hip joint prone to posterior or superior dislocation after surgery.

[0012] More specifically, the present invention aims to provide an operating table that allows for the wide-legged stance of the patient, the cutting of the pectineus muscle, and the subsequent external rotation and fixation of the lower limbs, thereby enabling access to the hip joint from the anterior medial side of the patient's body. This is achieved by approaching the hip joint from the posterior or lateral side of the body without cutting the joint capsule, ligaments, and gluteal muscles, which were conventionally cut. [Means for solving the problem]

[0013] The operating table 1 used in the anterior medial approach of total hip replacement surgery according to the present invention has a rectangular operating table body 100 on its upper surface, and this upper surface is the working surface that the patient comes into contact with. The operating table body 100 is divided into two parts: a body support section 110 and a lower limb support section 120. One of the lower limb support sections 120 is a rectangular flat platform in top view, positioned in a corner of the operating table body 100 close to the lower limb and knee 42 on the side where the patient 2 is to be operated on, and includes a lower limb support leg 126 that is fixed and held in place by a fixing device 105 on the upper surface and is removable. The other body support section 110 is the remaining part of the operating table body 100 excluding the lower limb support section 120, and is a flat platform with a bracket-shaped form when viewed from above. The patient's 2 lower limb and knee 43 on the side not being operated on are fixed to the top surface by a fixing device 106, and it supports most of the patient's body and weight. Multiple body support section legs 116 of the same length as the lower limb support section legs 126 are provided. The body support portion 110 has a bracket-shaped top view, and the body support portion edge 112, which is in the same direction as the long side 101 of the operating table body, and the lower limb support portion edge 121, which is in the same direction as the long side 101 of the operating table body, are in contact with each other and joined by a hinge 113, thereby connecting the body support portion 110 and the lower limb support portion 120 and integrating them with the operating table body 100. The lower limb support fixing device 122 is provided on the leg portion 116 of the body support below the hinge 113. The patient 2 is positioned supine on the central part of the operating table body 100, with the lower limb and knee 43 on the side not to be operated on aligned with the inner edge of the bracket-shaped operating table body 110 in the same direction as the long side 101 of the operating table body, and fixed to the body support part 110 using the fixing device 106. The lower limb 44 on the side to be operated on is raised (flexed) 80 to 100 degrees above the body (with the head facing upwards), rotated 80 to 100 degrees outwards (externally rotated), and the knee is flexed 80 to 100 degrees and fixed to the lower limb support part 120 using the fixing device 105. The pectineus muscle 107 and the skin of the pubic bone of patient 2 are temporarily treated and cut, and then the leg portion 126 of the lower limb support is removed. The hinge 113 is then rotated downward, and the lower limb and knee 42 of patient 2 being operated on and the other end 123 of the lower limb support are rotated and fixed to the lower limb support fixing device 122 located below the hinge 113. This further externally rotates and fixes the lower limb 44 being operated on. The system is characterized by allowing the surgeon to access the hip joint 5, which is the surgical field 50 for total hip replacement surgery on patient 2, who is lying supine with their legs spread wide, from the anterior medial side of the body 32.

[0014] Furthermore, the lower limb support units 120 can be configured in pairs, facing each other, to allow surgery to be performed on both the left and right hip joints of patient 2 simultaneously or separately.

[0015] Furthermore, it is preferable that the operating table 1 comprises an operating table body 200 having a body support section 210 that is inclined such that the side of the patient 2 being operated on, 44, is higher than the side not being operated on, 45, at an angle of 10 to 30 degrees.

[0016] Furthermore, the operating table body 200 is erected on an inclined body support section 210 and is equipped with an anti-slip device 240 to prevent the patient's body from moving away from the body support section 210.

[0017] Here, the body support section 210 is further provided with an anti-slip device fixing device 241 that allows setting the installation position of the anti-slip device 240 in the direction of the short side 202 of the operating table body, and the anti-slip device 240 is positioned by the anti-slip device fixing device 241 when the body support section 210 is tilted.

[0018] Furthermore, the body support edge 212 of the body support section 210, which is perpendicular to the short side 202 of the operating table body on the inside of the bracket shape, and the lower limb support edge 221 of the lower limb support section 220, which is perpendicular to the short side 202 of the operating table body, are brought into contact and joined by the hinge 213, thereby joining the body support section 210 and the lower limb support section 220 and integrating them with the operating table body 200. The lower limb support fixing device 222 is provided on the leg portion 216 of the body support below the hinge 213. Patient 2 is extended and laid supine on the central part of the operating table body 200 with the lower limb and knee 43 on the non-operated side of Patient 2 along the inner edge in the same direction as the long side 201 of the operating table body in the shape of a keyhole bracket of the body holding part 210, and fixed to the body holding part 210 using the fixing device 206. The lower limb on the operated side 44 of Patient 2 is lifted (flexed) 80 to 100 degrees upward of the body when the head direction is upward of the body, rotated (externally rotated) 80 to 100 degrees in the outer direction, and the knee is flexed 80 to 100 degrees and fixed to the lower limb holding part 220 using the fixing device 205. The skin of the pectineus muscle 107 and the epidermal part of the pubis of Patient 2 is temporarily treated and cut. Then, after the lower limb holding part leg 226 is removed, the hinge 213 is rotated downward, and the lower limb and knee 42 on the operated side of Patient 2 and the other end 223 of the lower limb holding part are rotated and fixed to the lower limb holding part fixing device 222 provided below the hinge 213. Thereby, the lower limb on the operated side 44 is further externally rotated and fixed, so that the lower limb on the operated side 44 is further externally rotated and fixed. It is characterized in that the operator can approach from the inner front 32 of the hip joint 5 of the surgical field 50 of the total hip arthroplasty of Patient 2 lying supine with the lower limbs widely abducted.

[0019] On the other hand, the lower limb holding parts 220 can be installed opposite to each other so that the hip joints of both the left and right sides of Patient 2 can be surgically treated simultaneously or separately.

[0020] In addition, the operating table 1 can further install a weight holding part 350 which is arranged on the lower surface of the body holding part 310 of the operating table body 300 and holds the weight of Patient 2.

[0021] Here, it is preferable that an anti-slip device 340 is provided on the upper surface of the weight holding part 350, which is connected by a hinge 314 from the body holding part 310 and erected, to prevent the body of Patient 2 from moving from the inclined body holding part 310.

[0022] Furthermore, the weight-holding section 350 further includes an anti-slip device fixing device 341 that sets the installation position of the anti-slip device 340 in the direction of the short side 302 of the operating table body, and it is preferable that the anti-slip device fixing device 341 positions the installation position of the anti-slip device 340 in the direction of the short side (302) of the operating table body when the body-holding section 310 is tilted.

[0023] Furthermore, the edge portion 312 of the body support portion 310, which is in the same direction as the long side 301 of the operating table body on the inside of the bracket-shaped body support portion 310, and the edge portion 321 of the lower limb support portion 320, which is in the same direction as the long side 301 of the operating table body, are brought into contact and joined by the hinge 313, thereby connecting the body support portion 310 and the lower limb support portion 320 and integrating the operating table body 100. The lower limb support fixing device 322 is provided on the leg portion 326 of the body support below the hinge 313. In the central part of the operating table body 300, the patient 2 is positioned supine with their body extended so that the lower limb and knee 43 on the side not to be operated on are aligned with the inner edge of the bracket-shaped operating table body 301 in the same direction as the long side 301 of the body support unit 310, and fixed to the body support unit 310 using the fixing device 306. The lower limb 44 on the side to be operated on is raised (flexed) 80 to 100 degrees above the body (with the head facing upwards), rotated 80 to 100 degrees outwards (externally rotated), and the knee is flexed 80 to 100 degrees and fixed to the lower limb support unit 320 using the fixing device 305. The pectineus muscle 107 and the skin of the pubic bone of patient 2 are temporarily treated and cut, and then the leg portion 326 of the lower limb support is removed. After this, the hinge 313 is rotated downward, and the lower limb and knee 42 on the side to be operated on and the other end 323 of the lower limb support are rotated and fixed to the lower limb support fixing device 322 located below the hinge 313. The lower limb 44 on the side to be operated on is further externally rotated and fixed, thereby enabling the surgeon to approach the hip joint 5, which is the surgical field 50 for total hip replacement surgery of patient 2, who is lying supine with his legs spread wide, from the anterior medial side of the body.

[0024] Furthermore, the lower limb support units 320 can be set up with two units facing each other, so that both left and right hip joints of patient 2 can be operated on simultaneously or separately.

[0025] On the other hand, the body support unit 110 may further include a pelvic fixation device 111 that holds and fixes the patient's pelvis, located near the inner corner of the bracket-shaped body support unit 110.

[0026] Furthermore, the operating table used in the anterior medial approach to total hip replacement surgery described in claim 13 is characterized in that, after fixing the patient's hip joint 5 to the pelvic fixation device 111, the hinge 113 between the edge of the body support part 112 and the edge of the lower limb support part 121 is rotated to fix the other end of the lower limb support part 123 and the lower limb and knee 42 of the patient's side to be operated on to the lower limb support part fixing device 122.

[0027] The method of using the operating table for the anterior medial approach to total hip replacement surgery as described in any one of claims 1 to 14 involves having the patient lie supine with their non-operational lower limb and knee extended along the inner edge of the operating table body in the same direction as the long side of the bracket-shaped body support section, fixing the operating table body to the center using a fixing device, and lifting (flexing) the patient's operating limb and knee 80 to 100 degrees above the body (with the head facing upwards) and rotating (externally rotating) 80 to 100 degrees outwards. After flexing the knee to 80-100 degrees and fixing it to the lower limb support using a fixing device, the patient's pubic muscle and the skin in the relevant area are temporarily treated and cut. Then, the leg portion of the lower limb support is removed, the hinge between the edge of the body support and the edge of the lower limb support is rotated downward, and the patient's lower limb and knee on the side to be operated on and the other end of the lower limb support are rotated and fixed to the lower limb support fixing device located below the hinge, and the lower limb on the side to be operated on is further externally rotated to 80-100 degrees and fixed. A method for using an operating table in the anterior-medial approach method for total hip replacement surgery described in any one of items 1 to 14, characterized in that the surgeon approaches the hip joint, which is the surgical field for total hip replacement surgery in a patient who is lying supine with their lower limbs spread wide, from the anterior-medial side of the body. [Effects of the Invention]

[0028] The operating table 1 used in total hip replacement surgery using the anterior medial approach according to the present invention has the patient 2 lying supine on the operating table 1, the femur 20 of the hip joint 5 of the patient 2 being operated on 44 is abducted 80 to 100 degrees at the hip joint 5 and externally rotated 80 to 100 degrees, the knee joint is flexed 80 to 100 degrees, the pectineus muscle 107 of the patient (2) is then temporarily cut in sequence, and the lower limb and knee (42) of the patient (2) being operated on is rotated to a lower limb support fixing device (122) provided below, and then further externally rotated 80 to 100 degrees and fixed. As a result, the operating table 1 used in total hip replacement surgery according to the present invention allows the surgeon to easily approach the hip joint 5 of the patient 2 in a supine position from the front and below (towards the feet) using the operating table according to the present invention, and to perform total hip replacement surgery by making an incision on the front medial side of the patient 2's hip joint 5, thereby preserving the joint capsule 30 on the posterior and lateral sides of the patient 2's hip joint 5.

[0029] Although the anterior-medial approach also involves cutting the joint capsule 30 and ligaments 31 from the cutting site 32, the risk of hip joint 5 dislocating anteriorly or medially is far smaller than the risk of dislocation laterally or posteriorly. As a result, the total hip replacement surgery according to the present invention has the excellent feature of significantly reducing the risk of complications that can occur with the conventional lateral approach method, such as posterior dislocation of the hip joint 5 after surgery.

[0030] Furthermore, in the total hip replacement surgery of the present invention, the patient 2 is positioned supine with their body extended in the center of the operating table body 100 and their legs spread wide. This moves the nerves and blood vessels on the front of the patient 2's body upward, making the surgery easier and reducing the burden on the patient 2. Furthermore, the total hip replacement surgery of the present invention has the advantage of being easy to perform because there are no large organs other than the pectineal muscle near the surgical site, and the subcutaneous fat layer is thinner compared to other areas.

[0031] Furthermore, the operating table 1 used in total hip replacement surgery according to the present invention has the advantage that the surgeon can observe the inside of the acetabulum 17 and the femoral head 23 of the patient's hip joint 5 more clearly by using an operating table 200 that is set up so that the side of the patient 2 being operated on 44 is higher than the side of the patient 2 not being operated on 45 at an angle of 10 to 30 degrees.

[0032] Furthermore, the operating table 1 according to the present invention may be provided with an anti-slip device 240 to prevent the patient's body 2 from moving from the inclined operating table body 200, and an anti-slip device fixing device 241 that can set the installation position of the anti-slip device in the direction of the short side 202 of the operating table body and fix it in a predetermined position. It is preferable to do so.

[0033] Furthermore, the operating table body 100 used for the anterior medial approach in total hip replacement surgery is characterized by having a weight-holding section 350 positioned on the underside of the body-holding section 110 to hold the weight of the patient 2. In this embodiment, an anti-slip device 340 and an anti-slip fixing device 341 are provided on the weight-holding section 350 to hold the weight of the human body, thereby further stabilizing the operating table body.

[0034] Furthermore, the operating table 1 according to the present invention may be provided with an anti-slip device 340 to prevent the patient's body 2 from moving from the inclined operating table body 300, and an anti-slip device fixing device 341 that can set the installation position of the anti-slip device in the direction of the short side 302 of the operating table body and fix it in a predetermined position. [Brief explanation of the drawing]

[0035] [Figure 1] This is a schematic diagram illustrating the total hip replacement surgery performed using the anterior medial approach method of the present invention. [Figure 2] Figure 2(A) is a front view of a surgical table according to the first embodiment of the present invention, and Figure 2(B) is a plan view thereof. [Figure 3] Figure 2 is an overhead view showing the patient lying supine on the operating table, with the lower limb and knee on the side to be operated on secured to the lower limb support. [Figure 4]Figure 3 is an overhead view showing the patient's lower limb, knee, and lower limb support on the side to be operated on, rotated and fixed below the operating table by cutting the pubic muscle. [Figure 5] This is a view of the patient and operating table in the state described in Figure 4, seen from the patient's head. [Figure 6] Figure 6(A) shows an overhead view of the operating table according to a second embodiment of the present invention, in which the body support section and the lower limb support section are tilted so that the side of the patient being operated on is higher than the side not being operated on, where Figure 6(A) is an overhead view of the operating table before the patient is placed on it, and Figure 6(B) is an overhead view of the operating table described in Figure 6(A) with the patient placed on it and fixed, and the lower limb support section rotated below the operating table body and fixed to the lower limb support section fixing device. [Figure 7] This is a view of the patient and operating table in the state described in Figure 6(B), seen from the patient's head. [Figure 8] Figure 8(A) shows a top view of the operating table body according to a third embodiment of the present invention, in which the side of the patient being operated on is raised higher than the side not being operated on, and further has a weight-holding part, wherein Figure 8(A) is a top view of the operating table body before it is tilted, and Figure 8(B) is a top view of the operating table described in Figure 8(A) with a patient placed and fixed, the body-holding part tilted, and the lower limb-holding part rotated downwards from the operating table body. [Figure 9] This is a view of the patient in the condition described in Figure 8(B), seen from the patient's head. [Figure 10] This is an endoscope view of the right half of the key part of the hip joint, seen from the front. [Modes for carrying out the invention]

[0036] The operating table used in the anterior medial approach to total hip replacement surgery according to the present invention and its usage method will be described in detail below with reference to the attached drawings. This description is for illustrative purposes only and does not limit the technical scope of the present invention. The present invention can be implemented in various ways without departing from the technical scope of the invention.

[0037] Figure 1 is a schematic process diagram showing the total hip replacement surgery using the anterior medial approach method of the present invention. Here, Figure 1(A) shows patient 2 lying supine with their body extended in the center of the operating table body (100). In this invention, patient 2, as shown in Figure 1(A), has the lower limb and knee 42 on the side to be operated on lifted 80 to 100 degrees above the body, rotated 80 to 100 degrees to externally rotate it, and the knee bent 80 to 100 degrees and fixed in place to reach the state shown in Figure 1(B). Note that Figure 1(B) is the same state as Figure 3.

[0038] Next, the pubic muscle 107 and the skin of the pubic bone of patient 2 in the state shown in Figure 1(B) are temporarily cut, and the leg portion 126 of the lower limb support is removed. Then, the hinge 113 is rotated to move the lower limb and knee 42 on the side of patient 2 to be operated on, and the other end 123 of the lower limb support to the lower limb support fixing device 122 located below the lower limb support 120 (X) and fix them in place, resulting in the state shown in Figures 1(C) to 4. Here, the surgeon can easily perform total hip replacement surgery on patient 2, who is lying supine with their legs spread wide, by approaching the hip joint 5, which is the surgical field 50, from an anterior-medial incision position 32. Based on the above, the anterior medial approach method according to the present invention will be described in detail below.

[0039] [First Embodiment] Figure 2(A) is a front view of the operating table 1 according to the first embodiment of the present invention, and Figure 2(B) is a plan view thereof. As shown in Figure 2(A, B), the operating table 1 used in the anterior medial approach method of total hip replacement surgery according to the first embodiment of the present invention preferably has an operating table body 100 which is a rectangular table with a horizontal top surface. The operating table body 100 is divided into two parts: a body support section 110 whose top surface is a support surface in contact with the patient and which holds most of the patient's body and weight, and a lower limb support section 120 which holds the lower limb 44 on the side of the patient to be operated on, and also has a side 44 on which the patient 2 is operated on and a side 45 that is not operated on.

[0040] Here, the lower limb support section 120 is a rectangular platform with a horizontal top surface and a long side in the same direction as the long side 101 of the operating table body. It has lower limb support legs 126 that support the lower limb and knee on the side of the operating table body 100 that will be operated on, and is positioned in a corner close to the lower limb on the side of the operating table body 100 that will be operated on. Furthermore, it is preferable that the lower limb support legs 126 be formed so that they can be removed from the lower limb support section 120 as needed by methods such as screwing, inserting, moving, or folding.

[0041] On the other hand, the body support section 110 is the remaining part of the operating table body 100 excluding the lower limb support section 120, and is a horizontal platform with a bracket-shaped form when viewed from above, and has body support section legs 116 of the same length as the lower limb support section legs 126, on which the majority of the patient's body and weight are placed, and can be brought into contact with and fitted with the lower limb support section 120 to form the operating table body 100. Reference numeral 122 denotes a lower limb support fixing device that is fixed to or movable below the lower limb support unit 120, either to the leg portion 116 of the body support unit or to the floor surface.

[0042] Figure 3 is an overhead view showing patient 2 lying supine on the operating table body 100 of Figure 2, with the lower limb and knee 42 on the side to be operated on fixed to the lower limb support unit 120. Figure 4 is an overhead view showing patient 2 as described in Figure 3, with the lower limb and knee 42 on the side to be operated on and the lower limb support unit 120 rotated downwards and fixed to the operating table body 100.

[0043] As shown in Figure 3, in the operating table 1 used for total hip replacement surgery according to the present invention, it is preferable to position the patient supine such that the patient is positioned along the long side 101 of the operating table body 100 on the central side of the body support section 110, and the patient's non-operating lower limb and knee 43 are aligned with the edge 112 of the body support section 110 in the direction of the bracket-shaped long side 101 of the operating table body.

[0044] Furthermore, it is preferable to fix or keep the patient's abdomen 3 and upper body 4 immobilized, and to fix the lower limb and knee 43 on the side not to be operated on to the body support unit 110 with a fixing device 106. Next, it is preferable to raise and flex the lower limb and knee 42 on the side to be operated on at the hip joint 5 to 80 to 100 degrees above the body, flex the knee joint 5 to 80 to 100 degrees to kneel, and then fix it to the lower limb support unit 120 with the fixing device 105 in a position approximately horizontally spread (externally rotated), thereby achieving the state shown in Figure 3. Here, the angle at which the lower limb is lifted (flexed) and the angle at which the knee joint is flexed are preferably within the range of 80 to 100 degrees. An angle less than 80 degrees or more than 100 degrees is undesirable because it exceeds the range of motion of the body or makes it difficult to securely fix the limb in place.

[0045] In Figures 3 and 4, reference numeral 116 denotes the leg portion of the body support unit, and reference numeral 113 denotes a hinge 113 that connects the end edge 112 of the body support unit and the end edge 121 of the lower limb support unit by bringing them into contact. A hinge is a joint between two members that is not movable up, down, left, or right but can rotate freely, and many types of hinges are known. A typical example of a hinge is a hinge, but the hinge of the present invention is not limited to this. Furthermore, X represents the rotational direction of the lower limb support part 120. In addition, the area enclosed by the dotted circle in Figures 3 and 4 is the surgical field 50 for total hip replacement surgery and the pelvic fixation device 111, including the acetabulum 17, femoral head 23, and pectineus muscle 107.

[0046] In the operating table 1 used for total hip replacement surgery according to the present invention, it is preferable to temporarily treat and cut the pectineus muscle 107 of patient 2 shown in Figure 3, remove the leg portion 126 of the lower limb support, and then rotate the hinge 113 between the edge portion 112 of the body support and the edge portion 121 of the lower limb support in the X direction, so that the lower limb and knee 42 on the side to be operated on and the other end 123 of the lower limb support can be rotated (externally rotated) to the lower limb support fixing device 122 below the operating table body 100 and fixed, as shown in Figure 4.

[0047] In other words, the present invention is characterized in that the femur 20 of patient 2 is flexed at approximately a right angle at the hip joint 5, more specifically, the femur 20 is flexed at the hip joint 5 by 80 to 100 degrees, externally rotated by 80 to 100 degrees, and the knee joint 5 is flexed by 80 to 100 degrees to the state shown in Figure 3, and then the femur 20 is further externally rotated at the hip joint 5 by 80 to 100 degrees to the state shown in Figure 4.

[0048] Here, Figure 5 shows the patient and operating table in the state described in Figure 4, viewed from the patient's head. As shown in Figure 5, in patient 2, the thigh 46 and the top of the foot face backward and upward towards the body, and the big toe 47 is on the outside of the body. This allows the practitioner to access the hip joint 5 of patient 2, whose legs are widely spread, at the anterior medial cutting position 32 (see Figure 10) of the body, as shown in Figure 4. Here, the number X is preferably within the range of 80 to 100 degrees. The area enclosed by the dotted circle in Figures 3 and 4 is the surgical field 50 for total hip replacement surgery, including the hip joint 5, acetabulum 17, femoral head 23, pectineus muscle 107, and pelvic fixation device 111.

[0049] Furthermore, temporarily treating the pectineus muscle 107 of patient 2 may include cutting and moving the pectineus muscle 107 and the skin of the epidermal portion of the pubis at the hip joint 5, thereby allowing the lower limb and knee 42 on the side being operated on to rotate downward. In addition, the pectineus muscle 107 and the skin of the epidermal portion of the pubis of patient 2, which have been temporarily treated and cut, can be restored by suturing after the procedure. Furthermore, the operating table 1 can also be equipped with two lower limb support units 120, one for each hip joint 5 of the patient 2 (the side to be operated on 44 and the side not to be operated on 45), so that surgery can be performed on each hip joint 5 separately, and on both the left and right hip joints 5 simultaneously.

[0050] Furthermore, it is preferable to provide a pelvic fixing device 111 for fixing the patient's pelvis 10 at the inner corner portion of the bracket-shaped body support portion 110. Here, the pelvic fixing device 111 is capable of fixing the pelvis 5 in a predetermined position at a predetermined angle, is positioned to firmly fix the patient's pelvis 10, and at least a portion of its installation position is included within a range that does not deviate from the inner corner portion of the bracket-shaped body support portion 110, and the inclination of its installation angle is within 30 degrees with respect to the upper surface of the operating table body, and is not particularly limited as long as it is in line with the purpose of the present invention. Also, reference numeral 50 denotes the surgical field for total hip replacement surgery of the present invention, and reference numeral 123 denotes the other end of the lower limb support portion.

[0051] [Second Embodiment] Figure 10 is a frontal view of the right half of the hip joint 5 of the human body, with the top of the figure representing the front. As shown in Figure 10, the hip joint 5 is a rotatable joint in which the spherical femoral head 23, which is curved upward, medially, and slightly posteriorly from the bone shaft 21 of the femur 20, is embedded approximately two-thirds in the cup-shaped acetabulum 17, which is located slightly anteriorly and downward on the lateral side of the pelvis 10, and is enclosed by the joint capsule 30 and ligaments 31. In this invention, in total hip replacement surgery using the anterior medial approach, the surgical field, particularly the inside of the acetabulum 17 and the femoral neck 22, can be better observed if the surgical side 44 of patient 2 is elevated above the non-surgical side 45. For this reason, the present invention further provides surgical table bodies 200 and 300 in which the surgical side 44 of patient 2 is elevated above the non-surgical side 45.

[0052] Figure 6 shows a diagram of an operating table according to a second embodiment of the present invention, in which the body support section and the lower limb support section are tilted so that the side of the patient being operated on is higher than the side not being operated on. Figure 6(A) is an overhead view of the operating table before the patient is placed on it, and Figure 6(B) is an overhead view of the operating table described in Figure 6(A) with the patient placed on it and fixed in place, and the lower limb support section rotated below the main body of the operating table and fixed to the lower limb support section fixing device.

[0053] As shown in Figure 6(A), the operating table 1 according to the second embodiment of the present invention has an operating table body 200 which is a rectangular table with an inclined top surface, and the top surface is a support surface that comes into contact with the patient 2, and is divided into two parts: a body support part 210 that holds most of the body and weight of the patient 2 on the side 45 that is not operated on, and a lower limb support part 220 that holds the lower limb and knee 42 on the side 44 that is being operated on. Furthermore, the operating table body 200 is installed at an inclination such that the side 44 of the body support part 210 is higher than the side 45 that is not being operated on at an inclination angle of 10 to 30 degrees. In addition, after the patient is placed on the operating table body 200 which is installed horizontally, the operating table body 200 can also be inclined so that the side 44 of the body support part 210 that is being operated on is higher than the side 45 that is not being operated on at an inclination angle of 10 to 30 degrees.

[0054] Here, the lower limb support section 220 is preferably an inclined rectangular platform having a long side perpendicular to the short side 202 of the operating table body (in the same direction as the long side of the operating table body, not shown), positioned in a corner of the operating table body 200 close to the lower body of the patient 2 on the side to be operated on, and holding the lower limb and knee on the side to be operated on, and having a lower limb support section leg 226 that can be removed as needed by methods such as screwing, inserting, moving, or folding. On the other hand, the body support section 210 is the remaining part of the operating table body 200 after removing the lower limb support section 220, and is an inclined platform with a bracket-shaped form when viewed from above. It supports the majority of the patient's body and weight on its upper surface using a fixing device 206, and may have multiple body support section legs 216. The body support section 210 and the lower limb support section 220 are arranged in the same plane as the upper surface of the operating table body 200 and can be fitted together to integrate the operating table body 200.

[0055] Furthermore, the body support portion 210 may have an anti-slip device 240 erected at approximately a 90-degree angle to the inclined body support portion 210 and connected by a hinge 214 to prevent the patient's body from moving. Furthermore, the body support section 210 may have a non-slip device fixing device 241 for fixing the non-slip device 240. Here, the non-slip device fixing device 241 can be freely positioned by operating a movable device provided on its side or back, or by screwing it into a screw, or by engaging it with a ratchet, so that when the body support section 210 is tilted, the non-operational side 45 of the body support section 210 can be positioned.

[0056] Here, the operating table body 200 is characterized in that the body support edge 212 of the body support part 210, which is perpendicular to the short side 202 of the operating table inside the bracket shape of the body support part 210 (in the same direction as the long side, not shown), and the lower limb support edge 221 of the lower limb support part 220, which is perpendicular to the short side 202 of the operating table body, are in contact with each other and joined by a hinge 213, thereby connecting the body support part 210 and the lower limb support part 220, and integrating the operating table body (100). Furthermore, it is preferable that a lower limb support fixing device (222) for fixing the lower limb support unit 220 is provided on the leg portion (216) of the body support unit below the operating table body 200 or on the floor surface.

[0057] Figure 6(B) is an overhead view showing the state in which a patient is placed and secured on the operating table 200 described in Figure 6(A), and the lower limb support unit 220 is rotated below the operating table body and secured to the lower limb support unit fixing device 220. In other words, as shown in Figure 6(B), it is preferable that the patient 2 lies supine on the central part of the operating table body 200, with the patient's non-operating lower limb and knee 43 resting against the bracket-shaped edge 212 of the body support section 210, perpendicular to the short side 202 of the operating table body 200 (in the same direction as the long side of the operating table body, which is not shown).

[0058] Furthermore, it is preferable to raise the lower limb and knee 42 on the side to be operated on 80 to 100 degrees above the body, flex the knee joint 80 to 100 degrees to place it in a kneeling position, and then spread the legs almost horizontally (externally rotated) and fix it to the lower limb support unit 220 with the fixing device 205. Here, the angle at which the lower limb is lifted, the angle at which the leg is externally rotated at the hip joint, and the angle at which the knee joint is flexed are preferably within the range of 80 to 100 degrees.

[0059] Next, the pubic muscle 107 and the skin of the pubic bone of patient 2 are temporarily treated and cut, and the leg portion 226 of the lower limb support is removed. Then, the hinge 213 is rotated downward, and the lower limb and knee 42 on the side to be operated on and the other end 223 of the lower limb support are rotated and fixed to the lower limb support fixing device 222 located below the hinge 213, thereby fixing the position shown in Figure 6(B).

[0060] Figure 7 is a side view of the patient and operating table in the state described in Figure 6(B), viewed from the patient's head. As shown in Figure 7, the lower limb and knee 42 on the side of patient 2 to be operated on are externally rotated by a total of 160 to 230 degrees (including the hip joint tilt angle), and externally rotated by 80 to 100 degrees, so that the leg faces backward from the body, the thigh and instep face upward from the body, and the big toe 47 faces outward from the body. This allows the surgeon to access the hip joint 5 of patient 2, whose lower limb 5 is widely spread, which is the surgical field 50 for total hip replacement surgery, from the anterior medial incision site 32 of the body.

[0061] Here, reference numeral 211 denotes a pelvic fixation device, and 216 denotes the leg portion of the body support unit. Furthermore, the operating table 1 can also be equipped with two lower limb support units 220 on the left and right sides to allow simultaneous surgery on the hip joints of the patient 2, both the side to be operated on (44) and the side not to be operated on (45), as well as on both the left and right hip joints.

[0062] [Third Embodiment] Figure 8 shows a surgical table according to a third embodiment of the present invention, in which the side of the patient being operated on is raised higher than the side not being operated on, and further has a weight-bearing section. Figure 8(A) is an overhead view of the surgical table 1 before the surgical table is tilted, and Figure 8(B) is an overhead view of the surgical table described in (A) with a patient placed and fixed, the body-bearing section tilted, and the lower limb-bearing section rotated downwards from the surgical table.

[0063] As shown in Figure 8(A), the operating table body 300 used in the anterior medial approach method of total hip replacement surgery according to the third embodiment of the present invention is an operating table having two layers, the upper surface being rectangular and the upper surface being a support surface in contact with the patient 2. Here, the operating table body 300 is characterized by having an upper layer that is divided into two parts: an upper layer that is inclined so that the side of the patient 2 to be operated on 44 is higher than the side that is not operated on 45 at an inclination angle of 10 to 30 degrees, and a lower layer that consists of a body support part 310 that holds the body and weight of the patient 2 on the side that is not operated on 45 and a lower limb support part 320 that holds the lower limb and knee 42 on the side to be operated on, and a lower layer that consists of a weight support part 350 provided below the body support part 310 and receiving weight from the body support part 310.

[0064] Here, the upper lower limb support section 320 is an inclined rectangular platform positioned in the corner of the operating table body 300 where the patient's 2 lower limb and knee 42 on the operating side are close together, and has a removable lower limb support leg 326, which can be used to fix the operating side lower limb and knee 44 with a fixing device 305. Preferably, the lower limb support leg 326 is provided in such a way that it can be removed as needed by screwing, inserting, moving, or folding methods.

[0065] On the other hand, the body support section 310 is the remaining part of the operating table body 300 after removing the lower limb support section 320, and is an inclined platform with a bracket-shaped form when viewed from above, having multiple weight-bearing leg sections 317, and the lower limb and knee 43 on the side not being operated on can be fixed with a fixing device 306. Preferably, the body support section 310 and the lower limb support section 320 are arranged on the same inclined plane as the upper surface of the operating table body 300 and are fitted together to integrate the upper layer of the operating table body 300. Furthermore, the operating table body 300 can also be equipped with two lower limb support units 320 on the left and right sides so that surgery can be performed simultaneously on the hip joints of the patient 2 on the side to be operated on 44 and the side not to be operated on 45, as well as on both the left and right hip joints.

[0066] As shown in Figure 8(A), the operating table body 300 is characterized by having a weight-bearing section 350 that is horizontally provided below the body-holding section 310 in the lower layer and receives the body weight from the body-holding section 310. Furthermore, it is preferable to provide a lower limb support fixing device 322 for fixing the lower limb support unit 320 to the leg portion 317 of the body support unit below the operating table body 300 or to the floor surface. Furthermore, it is preferable that the body support section 310 is initially positioned horizontally and then tilted after the patient 2 is placed on it.

[0067] Figure 8(B) is an overhead view showing the operating table body 300 described in Figure 8(A) with patient 2 placed and secured, body support unit 310 tilted, and lower limb support unit 320 rotated downwards from the operating table body 300. As shown in Figure 8(B), a body support 351 is provided between the weight-holding section 350 and the body-holding section 310, which can be attached and detached as needed by methods such as screwing, inserting, moving, or folding, and the surgical side 44 of the body-holding section 310 is tilted at an angle of 10 to 30 degrees higher than the non-surgical side 45. Here, it is preferable that the length of the body support member 351 is set in proportion to the distance between the body support member 351 and the hinge 314, so as to correspond to the angle between the body support member 310 and the weight support member 350.

[0068] Furthermore, as shown in Figure 8(B), the operating table body 300 preferably has an anti-slip device fixing device 341 that secures the anti-slip device 340 in the direction of the short side 302 of the operating table body. The anti-slip device fixing device 341 is preferably positioned at a predetermined location on the body support portion 310 by, for example, being operated by a moving device provided on the body support portion 310 or its side or back surface, or by being screwed into a screw, or engaging with a ratchet.

[0069] Here, it is preferable that the operating table body 300 has a hinge 313 formed by the contact of the lower limb support edge 321 of the body support part 310, which is in the same direction as the long side 301 of the operating table body on the inside of the bracket shape of the body support part 310, and the body support edge 312 of the body support part 310, which is in the same direction as the long side 301 of the operating table body, and a lower limb support fixing device 322 provided on the lower body support leg part (317) of the body support part 310 or on the floor surface to fix the lower limb support part 320. Reference numeral 311 denotes a pelvic fixing device.

[0070] Furthermore, as shown in Figure 8(B), it is preferable to fix the patient 2 in a supine position using the fixing device 305 so that the lower limb and knee 43 on the side of the body support part 310 that is not being operated on are aligned with the bracket-shaped body support part edge 312 in the direction of the long side 301 of the operating table body 300 in the central part of the operating table body 300.

[0071] Furthermore, it is preferable to fix or keep patient 2 still, fix the non-operational lower limb and knee 43 to the body support unit 310 with a fixing device 306, then raise the operating lower limb and knee 42 upward to 80 to 100 degrees to kneel, flex the knee joint 5 to 80 to 100 degrees, and then fix it to the lower limb support unit 320 with a fixing device 305 in a horizontally spread-leg position.

[0072] Next, the pectineus muscle 107 is temporarily treated and cut, the leg portion 351 of the lower limb support is removed, the hinge 313 between the edge portion 312 of the body support and the edge portion 321 of the lower limb support is rotated in the X direction to rotate and fix the lower limb and knee 42 and the other end 323 of the lower limb support to the lower limb support plate fixing position 322 below the operating table body 300, and the lower limb 44 on the side to be operated on is further externally rotated by 80 to 100 degrees, thereby abducting the femur 20 of the patient's hip joint 5 by 80 to 100 degrees and externally rotating it by 160 to 200 degrees, and flexing the knee joint by 80 to 100 degrees.

[0073] Figure 9 shows patient 2 and operating table 1 in the state described in Figure 8(B), viewed from the head of patient 2. As shown in Figure 9, the lower limb and knee on the side of patient 2 to be operated on are externally rotated a total of 160 to 200 degrees and 80 to 100 degrees, with the toes pointing backward, the thigh 46 and instep pointing upward, and the big toe 47 pointing outward. In the state described in Figures 8(B) and 9, the practitioner can approach the hip joint 5 of patient 2, whose legs are widely spread, from the anterior medial side 32 of patient 2.

[0074] Thus, the surgeon can perform total hip replacement surgery by using the operating table 1 used in the anterior-medial approach method of total hip replacement surgery according to the present invention to approach the hip joint 5 of patient 2 from the anterior-medial 32, and by performing the incision of the joint capsule 30, osteotomy of the femoral neck 22, removal of the femoral head 23 from the acetabulum 17, processing of the inside of the acetabulum 17, placement of the cup, replacement and insertion of the femoral head 23 into the cup, and suturing the pectineus muscle 107 and the epidermal portion of the pubis of patient 2, which have been temporarily treated and removed.

[0075] Although preferred embodiments of the invention have been described above, the present invention is not limited to these embodiments and includes all modifications that do not depart from the technical scope of the invention. [Explanation of symbols]

[0076] Symbol Name Figure Number Description Paragraph 1. Operating table (Figure 2, 0038) 2 Patient Figure 3 0043 3. Abdomen Figure 3 0043 4. Upper body Figure 3 0043 5. Hip joint Figure 10 0050 10 Pelvis Figure 10 0050 17. Acetabular bone (Figure 10 0050) 20 Femur Figure 10 0050 21. Bone structure Figure 10 0050 22 Femoral neck Figure 10 0050 23. Femoral head (Figure 10 0050) 29. Incision site (lateral approach) Figure 10 0050 30 Joint Capsule Figure 10 0050 31 Ligaments Figure 10 0050 32. Incision site (anterior medial approach) Figure 10 0048 42 Lower limb and knee on the side to be operated on Figure 2 0042 43 Lower limb and knee on the side not operated on Figure 2 0043 44 Side to be operated on Figure 2 0039 45 The side not operated on (Figure 2, 0039) 46 Thigh Figure 9 0073 47 Thumb Figure 5 0048 50 Surgical field Figure 3 0045 100 Operating table main body Figure 3 0039 101 Operating table main body, long side, Figure 3 0040 105 Fixation device (lower limb support) Figure 3 0042 106 Fixation device (body support part) Figure 3 0044 107 Pubic muscle Figure 3 0045 110 Body support section Figure 2 0039 111 Pelvic Fixation Device Figure 3 0045 112 Edge of body support part Figure 3 0045 113 Hinge Figure 3 0045 116 Body support leg section Figure 3 0041 120 Lower limb support section Figure 2 0039 121 Lower limb support edge Figure 3 0042 122 Lower Limb Support Fixing Device Figure 3 0041 123 Lower limb support part, other end, Figure 3 0041 126 Lower Limb Support Leg Figure 3 0040 200 Operating table main body Figure 6 0053 202 Operating table main body short side Figure 6 0056 205 Fixation device (lower limb support) Figure 6 0058 206 Fixation device (body support part) Figure 6 0054 210 Body support section Figure 6 0053 211 Pelvic Fixation Device Figure 6 0061 212 Edge of body support part Figure 6 0056 213 Hinge Figure 6 0056 214 Hinge Figure 6 0055 216 Body support leg section Figure 6 0056 220 Lower limb support part Figure 6 0054 221 Lower limb support edge Figure 6 0056 222 Lower Limb Support Fixing Device Figure 6 0056 223 Lower limb support part, other end, Figure 6 0059 226 Lower Limb Support Leg Figure 6 0054 240 Anti-slip device Figure 6 0055 241 Anti-slip device fixing device Figure 6 0055 300 Operating table main body Figure 8 0063 301 Operating table main body, long side, Figure 8 0069 302 Operating table main body, short side, Figure 8 0068 305 Fixation device (lower limb support) Figure 8 0064 306 Fixation device (body support part) Figure 8 0065 310 Body support section Figure 8 0063 311 Pelvic Fixation Device Figure 8 0069 312 Edge of body support part Figure 8 0069 313 Hinge Figure 8 0069 314 Hinge Figure 8 0067 317 Body support leg section Figure 8 0069 320 Lower limb support section Figure 8 0063 321 Lower limb support edge Figure 8 0069 322 Lower Limb Support Fixing Device Figure 8 0069 323 Lower limb support part, other end, Figure 8 0072 326 Lower Limb Support Section (Leg) Figure 8 0064 340 Anti-slip device Figure 8 0068 341 Anti-slip device fixing device Figure 8 0068 350 Weight-holding section Figure 8 0067 351 Body support device Figure 8 0067 X Rotation direction Figure 3 0045

Claims

1. The operating table (1) used in the anterior medial approach of total hip replacement surgery has an operating table body (100) with a rectangular upper surface, and this upper surface is the working surface in contact with the patient (2). The operating table body (100) is divided into two parts: a body support section (110) and a lower limb support section (120). The lower limb support section (120) is a flat platform with a rectangular shape when viewed from above, positioned in a corner of the operating table body (100) close to the lower limb and knee (42) on the side of the patient (2) to be operated on, and includes a removable lower limb support section leg (126) on the upper surface to which the lower limb and knee (42) on the side of the patient (2) to be operated on are fixed and held by a fixing device (105). The body support section (110) is the remaining part of the operating table body (100) excluding the lower limb support section (120), and is a flat platform with a bracket-shaped form when viewed from above, on which the lower limb and knee (43) of the patient (2) that is not operated on are fixed by a fixing device (106), and holds most of the patient's (2) body and weight, and is provided with multiple body support section legs (116) of the same length as the lower limb support section legs (126). The body support portion (110) has an inner bracket-shaped shape when viewed from above, and the body support portion edge (112) is in the same direction as the long side (101) of the operating table body. The lower limb support portion edge (121) of the lower limb support portion (120) is in the same direction as the long side (101) of the operating table body. These two portions are brought into contact and joined by a hinge (113), thereby connecting the body support portion (110) and the lower limb support portion (120), and integrating them with the operating table body (100). The lower limb support fixing device (122) is provided on the leg portion (116) of the body support below the hinge (113), The patient (2) is positioned supine in the central part of the operating table body (100), with the lower limb and knee (43) on the side not to be operated on extended and aligned with the inner edge of the bracket-shaped operating table body (110) in the same direction as the long side (101) of the operating table body, and fixed to the body support part (110) using the fixing device (106). The lower limb (44) on the side to be operated on is raised (flexed) 80 to 100 degrees above the body (with the head facing upwards), rotated 80 to 100 degrees outwards (externally rotated), and the knee is flexed 80 to 100 degrees and fixed to the lower limb support part (120) using the fixing device (105). The pubic muscle (107) and the skin of the pubic bone of the patient (2) are temporarily treated and cut, and then the leg portion (126) of the lower limb support is removed, after which the hinge (113) is rotated downward, and the lower limb and knee (42) (42) of the patient (2) to be operated on and the other end (123) of the lower limb support are rotated and fixed to the lower limb support fixing device (122) located below the hinge (113), thereby further externally rotating and fixing the lower limb (44) on the side to be operated on, An operating table for use in an anterior-medial approach to total hip replacement surgery, characterized in that the surgeon can access the hip joint (5), which is the surgical field (50) of the patient (2) lying supine with their lower limbs widely spread, from the anterior-medial side of the body (32).

2. The operating table for the anterior medial approach to total hip replacement surgery according to claim 1, characterized in that two lower limb support units (120) are installed facing each other so that both left and right hip joints of the patient (2) can be operated on simultaneously or separately.

3. The operating table (1) is characterized in that it comprises an operating table body (200) having a body support section (210) that is inclined such that the side of the patient (2) to be operated on (44) is higher than the side that is not operated on (45) at an angle of 10 to 30 degrees, and is used for the anterior medial approach method of total hip replacement surgery according to claim 1.

4. The operating table body (200) is erected on the inclined body support section (210), and is provided with an anti-slip device (240) to prevent the patient's (2) body from moving away from the body support section (210), characterized in that it is used in an anterior medial approach to total hip replacement surgery according to claim 3.

5. The body support portion (210) is further provided with an anti-slip device fixing device (241) that can set the installation position of the anti-slip device (240) in the direction of the short side (202) of the operating table body, and the anti-slip device (240) is positioned by the anti-slip device fixing device (241) when the body support portion (210) is tilted, characterized in that it is an operating table used for the anterior medial approach method of total hip replacement surgery according to claim 4.

6. The body support portion (210) has an inner bracket-shaped edge (212) perpendicular to the short side (202) of the operating table body, and the lower limb support portion (220) has an edge (221) perpendicular to the short side (202) of the operating table body, and these two portions are brought into contact and joined by a hinge (213), thereby connecting the body support portion (210) and the lower limb support portion (220) and integrating them with the operating table body (200). A lower limb support fixing device (222) is provided on the leg portion (216) of the body support below the hinge (213). The patient (2) is positioned supine on the central part of the operating table body (200), with the lower limb and knee (43) on the side not to be operated on aligned with the inner edge of the bracket-shaped operating table body (210) in the same direction as the long side (201) of the operating table body, and fixed to the body support part (210) using the fixing device (206). The lower limb (44) on the side to be operated on is raised (flexed) 80 to 100 degrees above the body (with the head facing upwards), rotated 80 to 100 degrees outwards (externally rotated), and the knee is flexed 80 to 100 degrees and fixed to the lower limb support part (220) using the fixing device (205). The pubic muscle (107) and the skin of the pubic bone of the patient (2) are temporarily treated and cut, and then the leg portion (226) of the lower limb support is removed, after which the hinge (213) is rotated downward, and the lower limb and knee (42) (42) of the patient (2) to be operated on and the other end (223) of the lower limb support are rotated and fixed to the lower limb support fixing device (222) located below the hinge (213). As a result, the lower limb on the side being operated on (44) is further externally rotated and fixed, An operating table for the anterior-medial approach method of total hip replacement surgery according to claim 5, characterized in that the operator can access the hip joint (5), which is the surgical field (50) of total hip replacement surgery of the patient (2) who is lying supine with his lower limbs spread wide, from the anterior-medial side of the body (32).

7. The operating table for the anterior medial approach to total hip replacement surgery according to claim 6, characterized in that two lower limb support units (220) are installed facing each other so that both left and right hip joints of the patient (2) can be operated on simultaneously or separately.

8. The operating table (1) is further characterized in that a weight-holding section (350) for holding the weight of the patient (2) is provided on the lower surface of the body-holding section (310) of the operating table body (300), and the operating table is used for the anterior medial approach method of total hip replacement surgery according to claim 3.

9. The operating table for the anterior medial approach to total hip replacement surgery according to claim 8, characterized in that an anti-slip device (340) is provided on the upper surface of the weight-holding portion (350), which is connected to the body-holding portion (310) by a hinge (314) and erected to prevent the patient's (2) body from moving away from the inclined body-holding portion (310).

10. The weight-holding portion (350) further includes an anti-slip device fixing device (341) for setting the installation position of the anti-slip device (340) in the direction of the short side (302) of the operating table body, and the anti-slip device fixing device (341) positions the installation position of the anti-slip device (340) in the direction of the short side (302) of the operating table body when the body-holding portion (310) is tilted, characterized in that it is an operating table used in the anterior medial approach method of total hip replacement surgery according to claim 9.

11. The edge portion (312) of the body support portion (310) that is in the same direction as the long side (301) of the operating table body inside the bracket-shaped part of the body support portion (310), and the edge portion (321) of the lower limb support portion (320) that is in the same direction as the long side (301) of the operating table body are brought into contact and joined by the hinge (313), so that the body support portion (310) and the lower limb support portion (320) are joined together and the operating table body (100) is integrated. A lower limb support fixing device (322) is provided on the leg portion (326) of the body support below the hinge (313). In the central part of the operating table body (300), the patient (2) is positioned in a supine position with their non-operating lower limb and knee (43) extended so that they are aligned with the inner edge of the bracket-shaped operating table body (310) in the same direction as the long side (301) of the operating table body, and fixed to the body support part (310) using a fixing device (306). The patient (2) is positioned with their operating side (44) raised (flexed) 80 to 100 degrees above the body (with the head facing upwards), rotated 80 to 100 degrees outwards (externally rotated), and their knee flexed 80 to 100 degrees, and fixed to the lower limb support part (320) using a fixing device (305). The operating table for the anterior-medial approach method of total hip replacement surgery according to 10, characterized in that the pectineus muscle (107) and the skin of the epidermal portion of the pubic bone of the patient (2) are temporarily treated and cut, then the leg portion (326) of the lower limb support is removed, the hinge (313) is rotated downward, and the lower limb and knee (42) on the side to be operated on and the other end (323) of the lower limb support are rotated and fixed to the lower limb support fixing device (322) provided below the hinge (313), and the lower limb on the side to be operated on (44) is further externally rotated and fixed, thereby enabling the surgeon to approach the hip joint (5), which is the surgical field (50) of total hip replacement surgery of the patient (2) who is lying supine with his legs spread wide, from the anterior-medial side of the body.

12. The operating table for the anterior medial approach to total hip replacement surgery according to claim 11, characterized in that two lower limb support units (320) are installed facing each other so that both left and right hip joints of the patient (2) can be operated on simultaneously or separately.

13. The operating table for use in the anterior medial approach to total hip replacement surgery according to claim 1, further comprising a pelvic fixation device (111) for holding and fixing the pelvis of the patient (2) at a position close to the inner corner of the bracket-shaped body support portion (110).

14. An operating table for the anterior medial approach to total hip replacement surgery according to claim 13, characterized in that, after fixing the hip joint (5) of the patient (2) to the pelvic fixation device (111), the hinge (113) between the edge of the body support part (112) and the edge of the lower limb support part (121) is rotated to fix the other end (123) of the lower limb support part and the lower limb and knee (42) of the patient (2) to be operated on to the lower limb support part fixation device (122).

Images