JPS62204769A - Collision preventing apparatus of medical apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Public Expenses for Industrial Use] This invention mainly relates to a safety device for personal injury of medical devices, but it can also be applied to other industrial equipment.

[Conventional technology]

In the field of medical devices, technological development has recently progressed, and treatment and diagnostic devices have become larger and more automated, but on the other hand, the risk of collisions with patients or other objects due to equipment malfunction has emerged. . In particular, among medical treatment devices, an electron applicator used for high-energy electron beam therapy is attached to the main body of the treatment device, and the other end is used for irradiation on the patient's body surface or during intraoperative irradiation. Conventional sensors, such as the one shown in Figure 6, have become meaningless because they are inserted into the open human body for treatment.Figure 8 shows an electron sensor equipped with a conventional sensor. This is the applicator. Not only the electron applicator but also the detectors for preventing collisions with patients and objects are generally configured like this.
is a sensor. A limit switch is placed between the spring (6) and 111, and as shown in Figure 7, the spring (7), limit switch (8), cam (9)
are placed around it. Such a device has the disadvantage that it functions for displacements in the directions of arrows IJLI and fbl, as shown in FIG. 6, but does not respond to rotations such as in the (0) direction or the 111+ direction. Irradiation field limiting mechanism (4)
If the device malfunctions and rotates in the direction (a), the collision prevention device will not function and the patient will be injured. Furthermore, when used by inserting it into the human body, there are drawbacks such as the collision prevention device functions due to the insertion, an interlock is activated, and the device cannot be used as a treatment device.

There is also a method of using a contact sensor that works by contact instead of the sensor (6) and spring ()), limit switch (81, and cam (910) shown in Figures 6 and 7. For the same reason, it cannot be used for devices that come into contact with the body surface or for devices that are inserted into the body.

[Problem that the invention seeks to solve]

As mentioned above, are there direct sensors for devices that are used in contact with the surface of the human body or inserted into the body? If it is installed, it will actually interfere with the function of the medical device itself, and in the conventional method, the collision prevention function works only against displacement in a certain direction (in the direction of C1 or +dl) , it had the disadvantage of not working.

This invention was made in order to solve the above-mentioned problems, and is capable of detecting danger in response to displacement fluctuations in all directions in a treatment device, and detecting any applicator that comes into contact with the patient's body surface. The object of the present invention is to obtain a collision prevention device that can effectively and effectively act on the vehicle.

[Means for solving problems]

The collision prevention device according to the present invention is capable of setting contacts in any direction and position, and is also capable of irradiating auxiliary devices that are used in contact with, inserted into, or close to any patient's body surface. A field-limiting mechanism is installed in the main body of a treatment device, and a flexible pipe or the like is interposed so that the direction and position can be changed freely, and a welder (pressure sensor, etc.) is installed at the tip of the flexible pipe.

[Effect]

The collision prevention device according to the present invention is designed to prevent collisions with objects f11! I
It consists of an n-sensing contact and a flexible support device such as a flexible pipe whose position can be changed freely. This allows the contact to be placed close to the surface and position of the patient's thoughts, etc., regardless of the shape of the accessory or the site of use, and to prevent any movement from occurring with the patient or object. The position can be set to prevent collisions.

〔Example〕

An embodiment of the present invention will be described below.

Figure 11 is an example.

In the figure (11 is the applicator used close to the patient or target object. +21 q patient or object,
+311fi treatment table, 141 is irradiation field limiting mechanism, (6)
is the main body of the treatment device. (101fl, 7 according to the present invention
It is a flexible support, and a contact part (1 piece) is arranged at the tip, and the flexible support (IOl) allows the contact to be freely placed near the body surface of the patient (2).

As shown in Fig. 1, the irradiation field limiting mechanism (two collision prevention devices on the 41 side + 1011 Regardless of whether it is inserted or used, it can be independently approached to the target object.

Figure 3 shows the structure of the junction part (11).
A sensor is a pressure sensor or a sensor that emits an electrical signal by deformation. The cable is a cable that transmits electrical signals from the sensor to the control system.

I protects the sensor and when it comes into contact with the patient's body surface,
It is a cover made of a soft, freely deformable material such as resin, arranged so as not to give any strange feeling.

The contact section (1) shown in Fig. 8 is one example, and can be considered as a device that transmits an electric signal just by contacting it.92 such sensors are arranged in the irradiation field limiting mechanism (4). By doing this, it is possible to sense the contact @ for all of the machine's ta+~(fl and other movements.

In other words, if the treatment table (31) is moved upward due to some operational problem or equipment malfunction, or if the main body (6)
As shown in Fig. 4, even if the collimator moves in the direction of the arrow te+ + <f, or the collimator rotates simultaneously in the + (11) direction, detection is possible with these two contact devices. By placing the flexible support part [101] near the thinking body surface and at least one on the lateral body surface of the patient, the armature part (If)' can be attached to the arrow tdl as shown in Fig. 2 rc. The contactor (
11) comes into contact with the body surface and senses abnormalities. Furthermore, in the case of treatment devices, the applicator 111 is often inserted into the body or inserted into an open human body part during surgery, such as during intraoperative irradiation. However, there was an inconvenience that the applicator with a contact sensor attached to it could not be used. Furthermore, the conventional device could not detect the displacement of the rotation tdl. In this device, the above-mentioned problem is solved by providing several clamping parts (other than the applicator).

Figure 4 shows the amplification of the electrical signal taken out from the contact part.
This is an example of a control circuit related to a safety device that stops all the small parts of the treatment device and stops the functions of the treatment device via the relay Ksk.

The signal from the contactor (Ill) passes through the amplifier (14t) and drives the base of the transistor (151), which operates the electromagnetic relay and closes its contacts.

Then, the main power cutoff relay aη operates to stop the medical device.

Although the present device has been mainly described in relation to a radiation therapy device, it is not limited to this and can be widely used in medical inspection devices and industrial devices.

Particularly in recent years, the safety of devices has become important, and as mentioned above, it is important only for medical devices that are used for patients. Safety must be ensured even in the event of machine abnormalities, malfunctions, or erroneous operations. [Effects of the Invention] As described above, by providing a touch sensing device that can freely change multiple setting positions, It can be used regardless of the shape of the applicator or the applicator for use in body cavities, and can operate in any direction of displacement, improving the safety of the treatment device. Furthermore, if this device is placed on the irradiation device side, for example on the irradiation field limiting mechanism side, there is no need to attach a safety device to each applicator as in the past, and the cost of the entire system becomes cheaper. .

[Brief explanation of drawings]

Fig. 1 is an embodiment of the collision prevention device according to the present invention, Fig. 2 is an explanatory diagram of the operation of the contact sensing section used in the invention, Fig. 3 is an explanatory diagram of the configuration of the sensing contact section, and Fig. 4 is an explanatory diagram of the structure of the sensing contact section. FIGS. 5 to 7 are block diagrams of a circuit that cuts off the main power supply based on a signal from a sensing contact portion, and are block diagrams of a conventional collision prevention device. +11 is the applicator, (2) is the patient or object, (31
is a treatment table or support device, (41 is an irradiation field limiting mechanism, (+
1) is the main body of the irradiation unit, (6) is the conventional sensor, +71 is the spring of the conventional sensor, (8H-f limit switch, (9) is the cam, and (lO) is the flexible support in the present invention. ,
(Ill is the touch sensing part in the present invention, α4 is the sensor in the present invention, the decoy is the signal cable, and 041 is the sensor protection cover. Note that the same reference numerals in each figure indicate the same or equivalent parts. shows.

Claims (1)

[Claims] 1. A medical device is equipped with multiple sensors whose direction, angle, length, and shape can be freely set, and when it comes into contact with a patient or other object, some of the functions of the medical device or a collision occurs. Collision prevention device for medical equipment that stops all functions except the prevention function.