JPH0323205Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a bed for collecting electrocardiographic signals used in various medical image capturing apparatuses that perform heartbeat-synchronized imaging or perform subsequent data editing with reference to heartbeat signals.

(Prior art) When using various medical imaging devices to photograph or display organs that move with the heartbeat, electrodes are attached to the subject to detect electrocardiographic signals, and a heartbeat trigger is generated based on the electrocardiographic signals. Imaging is performed in synchronization with the generated heartbeat (heartbeat-synchronized imaging) or post-data editing is performed with reference to the heartbeat signal. In particular, in a magnetic resonance imaging apparatus, a high-frequency magnetic field is applied to the imaging region, that is, the head and torso of the subject, so the electrocardiographic signals are collected from the legs.

FIG. 4 shows the configuration of the bed for collecting electrocardiographic signals in the above-described apparatus. In the figure, reference numeral 2 denotes the top plate of a bed for collecting electrocardiographic signals on which the subject 1 is placed.
The top plate 2 has a substantially flat shape in the longitudinal direction,
The subject 1 is placed on its back with its body axis aligned in the longitudinal direction and a pillow 9 placed on its head. Reference numeral 3 denotes electrodes attached to the left and right legs, which are outside the imaging area, in order to collect electrocardiographic signals. The electrode 3 is connected to an electrocardiograph 4, and an electrocardiogram signal processed by the electrocardiograph 4 is generated from a trigger generation circuit 5 to operate a medical image capturing apparatus 6.

By the way, when the subject 1 is placed on his back on the top plate 2 and his legs are relaxed, his knee joints are generally bent appropriately. On the other hand, the feet of the subject 1 are most stable when the entire feet are in contact with the top plate.

(Problem to be solved by the invention) Therefore, in the case of the conventional bed for collecting electrocardiographic signals, the top plate 2 is substantially flat in the longitudinal direction, so that the subject 1 can change the posture of the legs. In order to stabilize the body, you need to put pressure on your legs, stretch your knee joints, and straighten your legs. However, when I put pressure on my legs,
Myoelectric signals are generated due to the tension in the leg muscles.
Therefore, there has been a problem in that the myoelectric signals are mixed into the electrocardiogram signals collected from the feet and detected as noise.

The present invention has been developed in view of the above, and its purpose is to stabilize the legs without muscle tension when the subject 1 is placed on his back, and to avoid unnecessary electromyographic signals originating from leg tension. The object of the present invention is to realize a bed for collecting electrocardiographic signals in which the occurrence of electrocardiographic signals is reduced.

(Means for Solving the Problems) A bed for collecting electrocardiographic signals that achieves the above object is configured to include a support portion made of an elastic material that supports the knee joint of the subject higher than the body axis.

(Function) Equipped with a support made of elastic material that supports the knee joints of the subject lying on the bed for collecting electrocardiographic signals higher than the body axis, allowing the legs to be placed stably without applying force. . This prevents excessive tension from being applied to the subject's leg muscles.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A1-A2 in FIG. In these figures, the same symbols as those used in FIG. 4 are used with the same meaning. 7 is a support stand installed on the top plate 2.
The support base 7 is made of an elastic material such as sponge rubber and supports the rear thighs 12 and 13 with the rear knee 11 at the center. The upper surface of this support stand 7 is curved in the longitudinal direction, and the height h1 of the part that supports the knee part 11 is
The knee joint 10 is set at a high position relative to the body axis 15. Note that the height h2 of the portion supporting the heel 13 is lower than h1. Further, the upper surface of the support base 7 is also curved in the lateral direction, and has a curved surface corresponding to the shape of the foot. 9 is a pillow that supports the subject's head, and 8 is a sheet-like mat placed under the subject 1 to support the waist and shoulders. Reference numeral 3 denotes electrodes attached to the soles of both feet of the subject 1.

In the above configuration, since the support base 7 supports the knee joint 10 higher than the body axis 15, the leg of the subject 1 is appropriately bent, and the natural posture when the leg is relaxed is maintained. Moreover, since the feet are in contact with the support base 7 while maintaining their natural posture, the posture is stable even when the foot is relaxed. Therefore, there is no need to apply force to the leg muscles to adjust the posture of the legs, and almost no extra myoelectric signals are generated due to tension in the legs.

FIG. 3 is a block diagram showing a second embodiment of the present invention. In the figure, the same symbols as those used in FIG. 1 are used with the same meaning. In step 70, while the knee joint 10 of the subject 1 is held higher than the body axis and the legs are relaxed, a mold of the leg of the subject 1 is made by pouring liquid room temperature curing rubber such as silicone rubber into a frame. It is a solid support.

Even in such a configuration, the same effects as in the first embodiment can be obtained.

Note that the present invention is not limited to the above embodiments. In the first example, the height h2 of the part that supports the heel was lower than h1;
It may be higher than h1 as long as the feet can maintain a natural posture. Further, the support stand 7 may be provided with a mechanism for adjusting the height h1 and/or h2 according to individual differences in the subject 1. In the second embodiment, the support base 70 was made of rubber that cures at room temperature, such as silicone rubber, but other materials such as two-component urethane rubber or foamed urethane may be poured into the frame to take the impression of the foot. Furthermore, these supports may be pre-attached with electrodes for detecting electrocardiographic signals, on which the feet may be placed.

(Effects of the invention) As explained above, the bed for collecting electrocardiographic signals of the invention is configured to include a support part made of an elastic material that supports the knee joint of the subject higher than the body axis. Therefore, when the subject is placed on his/her back, the legs can be placed stably without applying any force.
Do not leave tension in your leg muscles. Therefore, electrocardiographic signals can be collected with almost no extra myoelectrical signals resulting from tension in the legs.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line A1-A2 in FIG.
Figure 3 is a configuration diagram showing the second embodiment of the present invention;
The figure is a configuration diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Subject, 2... Top plate, 3... Electrode, 4... Electrocardiograph, 5... Trigger generation circuit, 6... Medical imaging device, 7, 70... Support stand, 10... Knee joint, 11... Rear knee 12... Posterior thigh, 13... Heel, 15... Body axis.

Claims (1)

[Scope of utility model registration request] When displaying an image of a desired part of the subject, electrodes were placed on the subject's feet to collect electrocardiographic signals, and a heartbeat trigger was generated based on the electrocardiographic signals to synchronize with the heartbeat. A bed for collecting electrocardiographic signals of various medical imaging devices that performs data editing with reference to the above-mentioned pulsation is equipped with a support made of an elastic material that supports the knee joint of the subject higher than the body axis. A bed for collecting electrocardiographic signals.