Medical fixation device

Abstract

To provide a medical fixation device capable of simply performing positioning and fixation and capable of reliably keeping the fixation.SOLUTION: A medical fixation device 1 comprises: a fiber bundle 2 which is obtained by winding a fiber into a loop shape a plurality of times; a plurality of fitting members 3 which are fitted mutually and connected and disposed in series with the fiber bundle 2 inserted therethrough; and a fixation part 4 which pulls the fiber bundle 2 from at least one end of the fiber bundle 2 and fixes the fitting members 3 in a mutually fitted state.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a medical fixing device for fixing a patient's position during surgery, for example, or for fixing a surgical instrument. [Background technology]

[0002] When performing surgical procedures in the medical field, the surgical procedure may involve fixing the patient's position, or using medical forceps to lift and fix organs or tissues in place to keep the surgical field large.

[0003] In this case, fixation can be done manually, but if the surgical procedure continues for several hours, there is a risk that the fixation position may shift or the fixation may be released accidentally, leading to a serious medical accident. Therefore, fixation is performed using a device that uses a link mechanism to fix the patient, as in Patent Document 1, or a device that uses a flexible arm to fix forceps (brain spatula), as in Patent Document 2. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-261941 A [Patent Document 2] JP 2016-159110 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the link mechanism requires positioning for each joint, which is time-consuming and laborious. In addition, in a mechanism for fixing forceps using a flexible arm, the wire and the flexible arm are made of separate members, so the wire and the flexible arm are connected by, for example, tying the wire or tying one end of the wire into a loop and hooking it. Therefore, while there is no problem with light items such as forceps (brain spatula), when fixing items of a certain weight, the knot of the wire may loosen and the fixing position may change. As mentioned above, shifting of the fixing position during surgery may lead to serious medical accidents, and must be avoided without fail.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its main object is to provide a medical fixation device that can be easily positioned and securely fixed regardless of the weight of the object to be fixed. [Means for solving the problem]

[0007] The medical fixation device of the present invention is characterized in that it comprises a fiber bundle formed by winding fibers in a loop shape, a plurality of fitting members which fit together and are arranged in series with the fiber bundle inserted therethrough, and a fixing portion which pulls the fiber bundle from at least one end of the fiber bundle and fixes it in a state in which the fitting members are fitted together.

[0008] With the above-mentioned configuration, the fiber bundle is looped, so that one end of the loop can be hooked to another member such as a fixing part. At this time, when weight is applied to the fiber bundle, the fibers that are wound multiple times and that constitute the fiber bundle maintain the loop state without changing the loop length due to frictional force. In addition, since there is no knot, the fiber bundle does not loosen. As a result, regardless of weight, the fixing can be maintained without shifting the fitting member from the desired position. In addition, since the fitting member is held by the frictional force of each fiber that constitutes the fiber bundle, it is possible to prevent the fitting member from shifting in position relative to the fiber bundle. In addition, since the fitting member can be fixed at the desired position simply by pulling the fiber bundle with the fixing part, the user can easily use the medical fixing device of the present invention.

[0009] In one specific embodiment of the medical fixing device of the present invention, the fitting members are fitted together to form a bellows shape.

[0010] A specific embodiment of the medical fixing device of the present invention includes a fitting member having a first fitting surface that fits with another fitting member arranged close to one end side, and a second fitting surface that fits with another fitting member arranged close to the other end side, a first gear is provided on the first fitting surface, and a second gear is provided on the second fitting surface, and the fixing portion fixes the first gear on the first fitting surface of the fitting member and the second gear on the second fitting surface of the other fitting member in a fitted state.

[0011] In one specific embodiment of the medical fixation device of the present invention, the fitting member is movable only in the rotational direction of the first gear and the second gear in a state where the fitting member is fitted with another fitting member. Effect of the Invention

[0012] According to the present invention, it is possible to provide a medical fixation device that can easily position and fix an object to be fixed and can reliably maintain fixation regardless of the weight of the object to be fixed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a schematic view showing a state in which the medical fixing device of the first embodiment is used. [Diagram 2] FIG. 1 is a perspective view of a medical fixing device according to a first embodiment. [Diagram 3] FIG. 1 is a schematic view of a medical fixing device according to a first embodiment. [Figure 4] FIG. 2 is a perspective view showing a fitting member according to the first embodiment. [Diagram 5] Cross-sectional view taken along line AA in Figure 5. [Figure 6] FIG. 1 is a schematic view showing a fiber bundle according to a first embodiment. [Figure 7] FIG. 6 is a schematic view of a medical fixing device according to a second embodiment. [Figure 8] Cross-sectional view of line BB in Figure 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The medical fixation device of the present invention is used to fix the patient's position and to fix forceps during surgery. The medical fixation device of the present invention will be described in detail below with reference to the drawings, taking brain surgery as an example. In this description, common parts are given common reference symbols throughout the drawings unless otherwise specified. In addition, in the drawings, the elements of each embodiment are not necessarily shown to scale. In addition, some symbols may be omitted to make each drawing easier to see.

[0015] First Embodiment When performing brain surgery or cervical spine surgery, the patient is placed face down (prone position) and the head is fixed during the surgery. As shown in Fig. 1, the medical fixation device 1 of the first embodiment is provided, which connects a head fixing part 100 that fixes the side of the head and an attachment part 300 that is attached to a bed 200 on which the patient's torso is placed, and fixes the head fixing part 100 to the bed 200 at a desired position.

[0016] As shown in Figs. 2 to 6, the medical fixing device 1 of the first embodiment includes a fiber bundle 2 formed by winding fibers in a loop shape, a plurality of fitting members 3 which fit together and are arranged in series with the fiber bundle 2 inserted therethrough, and a fixing part 4 which pulls the fiber bundle 2 from at least one end of the fiber bundle 2 and fixes the fiber bundle 2 in a state where the fitting members 3 are fitted together.

[0017] The fiber bundle 2 is made of, for example, chemical fibers, such as polyester fibers or polyether fibers. In this embodiment, the fiber bundle 2 is made of yarn using modified polyphenylene ether fibers. As shown in FIG. 6, the fiber bundle 2 is a loop-shaped bundle formed by winding fibers (yarns) multiple times at predetermined intervals.

[0018] As shown in Figures 2 to 5, the fitting member 3 has a gap 5 through which the fiber bundle 2 is inserted from one end to the other end, and has a first fitting surface 6 at one end for fitting with another fitting member 3, and a second fitting surface 7 at the other end for fitting with another fitting member 3.

[0019] 4 and 5, in this embodiment, the fitting member 3 (3a, 3b, 3c) is composed of a first base 8 having a cylindrical shape and a second base 9 having a substantially semicircular ring shape, which is integrally joined to a part of the outer circumferential surface of the first base 8. The radius of the outer circumferential surface of the first base 8 and the radius of the inner circumferential surface of the second base 9 are configured to be substantially the same.

[0020] 4 and 5, the first base body 8 has a first gear 10 composed of a plurality of first teeth standing at a constant pitch intervals provided on its outer circumferential surface facing the portion to which the second base body 9 is joined. The outer circumferential surface on which the first gear 10 is provided becomes the first fitting surface 6.

[0021] 4, the second base body 9 is provided with a second gear 11 having second teeth arranged at a constant pitch interval on its semicircular inner circumferential surface to engage with the first teeth. The inner circumferential surface on which the second gear 11 is provided becomes the second mating surface 7.

[0022] The first substrate 8 and the second substrate 9 are provided with a gap 5 that passes through from the first fitting surface 6 of the first substrate 8 to the second fitting surface 7 of the second substrate 9 and through which the fiber bundle 2 is inserted.

[0023] 4 and 5, the fitting members 3a are arranged in series such that the second fitting surface 7 of another fitting member 3b is disposed on the first fitting surface 6, and the first fitting surface 6 of another fitting member 3c is disposed on the second fitting surface 7. In this state of being arranged in series, the gaps 5 provided from the first fitting surface 6 toward the second fitting surface 7 are arranged in a continuous manner.

[0024] In this state, the fiber bundle 2 is inserted so that one end of the loop of the fiber bundle 2 protrudes from an opening constituting the gap 5 provided in the first fitting surface 6 of the fitting member 3 arranged at the tip of the multiple fitting members 3, and the other end of the loop of the fiber bundle 2 protrudes from an opening constituting the gap 5 provided in the second fitting surface 7 of the fitting member 3 arranged at the end of the multiple fitting members 3. As a result, the multiple fitting members 3 are arranged in series connected by the fiber bundle 2 inserted into the gap 5, as shown in Figures 2 and 3.

[0025] At this time, when the meshing position of the first gear 10 and the second gear 11 is changed, the fitting member 3 moves along the circumferential direction of the first base body 8 and the second base body 9 relative to the other fitting member 3 while being fitted with the other fitting member 3. Therefore, for example, as shown in Fig. 1, the head fixing part 100 can be adjusted to a desired position relative to the bed 200 by bending a plurality of fitting members 3 arranged in series.

[0026] The fixing portion 4 includes a fastening member (not shown) that prevents one end of the loop of the fiber bundle 2 protruding from an opening that forms the gap 5 provided in the first fitting surface 6 of the fitting member 3 arranged at the tip of the multiple fitting members 3 from entering the gap 5 when the fiber bundle 2 is inserted into the gap 5 of the multiple fitting members 3 and the multiple fitting members 3 are connected by the fiber bundle 2, and a hooking portion 12 that hooks the other end of the loop of the fiber bundle 2 protruding from an opening that forms the gap 5 provided in the second fitting surface 7 of the fitting member 3 arranged at the end of the multiple fitting members 3.

[0027] The fastening member is arranged, for example, externally on the outer circumferential surface of the first base 8, and can be configured with a member larger than the opening of the gap 5. By hooking and locking one end of the loop of the fiber bundle 2 on the member, the one end of the loop of the fiber bundle 2 is prevented from entering the gap 5. Note that the fastening member is not limited to the above-mentioned configuration. Also, it may be provided on the head fixing part 100 connected to the medical fixing device 1 of this embodiment.

[0028] In this embodiment, the hook portion 12 is composed of a disk-shaped base 13 and a stretching member 14 extending upright from the base 13, and is arranged in a state in which one end of the loop of the fiber bundle 2 is hooked onto the stretching member 14 and the other end of the fiber bundle 2 is engaged with the stretching member 14.

[0029] Here, the base 13 and the stretching member 14 are provided with, for example, a cam mechanism or a screw mechanism, and when the base 13 is rotated in the forward circumferential direction, the distance between the fitting member 3 arranged at the end and the base 13 increases, and the fiber bundle is stretched. When the base 13 is rotated in the reverse circumferential direction, the distance between the fitting member 3 arranged at the end and the base 13 decreases, and the fiber bundle relaxes.

[0030] Therefore, when the base 13 is rotated in the forward circumferential direction, the fiber bundle 2 is pulled and the position of the fitting member 3 inserted into the fiber bundle 2 is fixed. When the base 13 is rotated in the reverse circumferential direction, the fiber bundle is relaxed and the position of the fitting member 3 can be moved.

[0031] In the medical fixing device 1 of the first embodiment configured as described above, since the fiber bundle 2 is looped, another member such as the fixing part 4 can be hooked on one end of the loop. At this time, when weight is applied to the fiber bundle 2, the fibers that are wound multiple times and that constitute the fiber bundle 2 maintain the loop state without changing the loop length due to frictional force. In addition, since there is no knot, the fiber bundle 2 does not loosen. As a result, regardless of the weight, the fixing can be maintained without shifting the fitting member 3 from the desired position. In addition, since the fitting member 3 is held by the frictional force of each fiber that constitutes the fiber bundle 2, it is possible to prevent the fitting member 3 from slipping relative to the fiber bundle 2 and other positional deviations. In addition, since the fitting member 3 can be fixed at a desired position simply by pulling the fiber bundle 2 with the fixing part 4 (simply rotating the disk-shaped base 13 in this embodiment), the user can use the medical fixing device 1 easily.

[0032] In addition, the medical fixation device 1 of this embodiment is configured to be variable only in the circumferential direction of the first base body 8 and the second base body 9, that is, in the rotational direction of the first gear 10 and the second gear 11, by the first gear 10 and the second gear 11 provided on the fitting member 3. Therefore, by restricting the moving direction of the fitting member 3, it is possible to provide a medical fixation device 1 with excellent safety by further preventing the fitting member 3 from slipping.

[0033] At least one of the fitting member 3 and the fixing part 4 is preferably made of an X-ray transparent material, such as carbon fiber, etc. With this configuration, it is possible to prevent the medical fixing instrument 1 of this embodiment from being reflected in an image when performing surgery while imaging the surgical field with MRI or CT.

[0034] <Second embodiment> Next, a medical fixing tool 20 of a second embodiment will be described with reference to the drawings. The medical fixing tool 20 of the second embodiment is the same as the medical fixing tool 20 of the first embodiment, except that the fitting member 21 is different from that of the first embodiment. Therefore, the description overlapping with the first embodiment may be omitted.

[0035] As shown in Figs. 7 and 8, the medical fixing instrument 20 of the second embodiment has a bellows shape formed by a plurality of fitting members 21 that are connected in series in a fitted state.

[0036] The fitting member 21 includes a third base 23 having a spherical shape, and a fourth base 24 having a circular ring shape and integrally provided on a part of the outer periphery of the third base 23. A cylindrical gap 25 is provided penetrating the third base 23, and the gap 25 communicates with a space 26 inside the circular ring shape of the fourth base 24. The diameter of the inner peripheral surface of the circular ring shape of the fourth base 24 is equal to the diameter of the outer periphery of the third base 23.

[0037] The opening surface of the third base 23, in which the gap 25 is provided, engages with the inner peripheral surface of the fourth base 24 of another fitting member 21, and the inner peripheral surface of the fourth base 24 engages with the opening surface of the third base 23 of another fitting member 21, in which the gap 25 is provided.

[0038] When the fitting members 21 configured as described above are arranged in series, as shown in FIG. 8, the voids 25 provided in the third base 23 and the inner spaces 26 of the fourth base 24 communicating with the voids 25 are alternately arranged in series, forming a single cylindrical through hole.

[0039] By inserting the fiber bundles 2 into the through holes, a plurality of fitting members 21 are arranged in series as shown in Figs.

[0040] In the medical fixing device 20 of the second embodiment, the opening surface of the third base 23 where the gap 25 is provided can move freely 360 degrees relative to the inner peripheral surface of the fourth base 24, thereby improving the degree of freedom of the medical fixing device 20. Note that the fitting member 21 of the second embodiment is also preferably made of an X-ray transparent material, such as carbon fiber.

[0041] The medical fixing device of the present invention is not limited to the above-mentioned configuration.

[0042] For example, the fibers used for the fiber bundle are not limited to those mentioned above, and for example, a combination of natural fibers and chemical fibers may be used.

[0043] The method of inserting the fiber bundle is not limited to the above-mentioned configuration. For example, the fitting member may be configured to have two gaps, with one side of the fiber bundle loop being inserted through one gap and the other side of the fiber bundle loop being inserted through the other gap. Alternatively, the fitting member may be configured to be inserted through only one side of the fiber bundle loop. Note that when two gaps are provided in the fitting member, the retaining member of the fixing portion may not be required.

[0044] The fitting member is not limited to the above-mentioned configuration. The fitting member may be composed of a first base body having an annular shape and a second base body having an approximately semicircular annular shape, integrally joined to a part of the annular outer peripheral surface of the first base body. In this case, the radius of the outer peripheral surface of the first base body and the radius of the inner peripheral surface of the second base body are configured to be approximately the same. By configuring the first base body to be annular, the weight of the fitting member can be reduced. In addition, the shape of the first base body and the second base body may be polygonal as well as circular.

[0045] The configuration of the fixing portion is not limited to the above-mentioned configuration, and may be any configuration capable of tensioning the fiber bundle.

[0046] The present invention can be modified in various ways without departing from the spirit of the invention. [Explanation of symbols]

[0047] 1, 20 Medical Fixation Devices 2. Fiber bundle 3, 21... Fitting member 4... Fixed part 5, 25... air gap 6···First mating surface 7...Second mating surface 8... First base 9...Second base body 10... 1st Gear 11... 2nd Gear 12 Hook section 13... Foundation 14... Extension member

Claims

1. A fiber bundle formed by winding a fiber into a loop shape; A plurality of fitting members that are fitted to each other and are connected and arranged in series with the fiber bundles inserted therethrough; and a fixing portion that pulls the fiber bundle from at least one end of the fiber bundle and fixes the fiber bundle in a state in which the fitting members are fitted together.

2. 2. The medical fixing device according to claim 1, wherein the fitting members are bellows-shaped when fitted together.

3. the fitting member includes a first fitting surface that fits with another fitting member arranged adjacent to one end side, and a second fitting surface that fits with another fitting member arranged adjacent to the other end side, A first gear is provided on the first fitting surface, A second gear is provided on the second fitting surface, 2. The medical fixation device according to claim 1, wherein the fixing portion fixes the first gear on the first fitting surface of the fitting member and the second gear on the second fitting surface of the other fitting member in a fitted state.

4. 4. The medical fixation instrument according to claim 3, wherein the engaging member is movable only in a rotational direction of the first gear and the second gear in a state where the engaging member is engaged with another engaging member.

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