DE102006016043A1 - Safety system for detection of possible danger of patient, has processing unit verifying personal data for possible danger of persons based on operational data of technical device, and outputting warning signals during detection of danger - Google Patents

Abstract

The system has a technical device (1) e.g. beam emitting device, with radio frequency identification (RFID) transponders (10B-10D) having personal data, and a RFID reader (5). A processing unit (4) connected with the reader measures the data, where the unit is designed such that the data are verified for a possible danger of persons (6B-6D) e.g. patients, based on operational data of the device. The unit outputs warning signals (W, S) during detection of possible danger. The device is implemented in such a manner that radiation exposure is reduced during existence of the signals. An independent claim is also included for a method for detection of a possible danger of a person by a technical device.

Description

The The invention relates to a security system and to a method to determine a possible endangering a person through a technical device.

To the technical equipment, possibly of those a danger for persons emanates belong many medical diagnostic or therapy devices. So put medical imaging diagnostic equipment electromagnetic fields, X-rays or ultrasound to generate image information to get information about diseased or organs and / or body parts injured by an accident to get a person. This information supports one attending physician at a diagnosis. Set medical therapy equipment electromagnetic fields, for example for the treatment of muscle injuries one. In particular, in persons who used metallic implants such as pacemakers or prosthetics, can be used in medical Diagnostic or therapy devices noxious or, in extreme cases, life-threatening complications.

Also in the non-medical area there are technical devices, from which is a potential hazard for persons emanates. To endanger heavily accelerated elevators or roller coasters at the carnival people with an intolerance across from strong accelerations.

in the medical field is at particular risk from medical diagnostic or therapy devices out, which produce an alternating electromagnetic field. So is during the Examination with a magnetic resonance tomograph one examined Person exposed to an alternating electromagnetic field. Is this Person implanted with a pacemaker may lie a health hazard through the electromagnetic field. The alternating field induces an electric field. A pacemaker has pacemaker electrodes, which are arranged in the heart muscle of the person. Because the pacemaker electrodes with a thickness of only a few mm have a certain length, is the electric Share of the alternating field in particular at the electrode tips high what to a local temperature increase of several Kelvin in the myocardium and subsequently possibly too Injuries to the heart muscle. The alternating field may also call a malfunction on the pulse generator of the pacemaker.

comparable Effects are with other electrical implants, such as dosing pumps or cochlear implants, if they are an electromagnetic Field are exposed.

static Magnetic fields pose a particular hazard for persons with larger ferro- or paramagnetic implants or prostheses. One on such Implant-engaging magnetic force, for example, the position of this implant in the body to change the person. A possible Consequence is an influence or a failure of the function of the implant. This may be a replacement of the implant necessary.

Also Persons located in the catchment area of such medical diagnostic or therapy equipment stop, are a potential hazard from electromagnetic Exposed to radiation.

For the protection Therefore, it is important for people with such implants to learn about the use of a medical diagnostic or therapeutic device, whether a person carrier of implants and what implants it may be is.

often introduces Do not ask a person for targeted information. Many people lack the medical knowledge about the design of theirs body located implants.

A Person who is the victim of a serious accident is often direct to investigate with a medical diagnostic device following this accident, to statements about to get her injuries. If the person as a result of the accident is unconscious or has been heavily medicated, for example With a painkiller, no questioning is possibly in her body implants are feasible.

Also demented individuals suffering from, for example, Alzheimer's disease can suffer no statements about possibly in her body meet the implants.

moreover exists especially in larger clinics Danger that people are confused, especially if one examining doctor and the medical diagnostic device spatially far are separated from each other when the investigation of a person is not by the attending physician, but by another doctor or a medical assistant takes place, or if an instruction a person by an external doctor to a clinic for an examination with the medical diagnostic device.

It There is therefore a not insignificant risk that in the described cases an examination method is performed on a person that harm the person can.

Out DE 10 2004 017 183 A1 and DE 10 2004 017 185 A1 For example, a medical device is known in which access to an area of a field of high field strength is detectable. This detection is achieved for example via light barriers. The aim here is to protect persons who approach a medical facility, in particular without authorization, from possible health risks. The medical system will be turned off in any case in case of unauthorized access.

Out US 2005 / 0247319A1 it is known implants by using the Identify RFID technology. The goal here is the captive Provide information about an implant on a with the implant associated RFID transponder and a reading of this information when needed. RFID stands for radio Frequency Identification, a special method for radio detection. In this case, generally data of an RFID transponder, the at a Object is arranged and contains object-related data, from an RFID reader read. The data transmission between RFID transponder and RFID reader takes place by means of electromagnetic Waves take place. The distance, over If an RFID transponder can be read out, it depends on the type of construction.

Of the Invention is based on the object to avoid a danger to a person which is in the catchment area of a technical device.

These Task is carried out according to the invention the feature combination of claim 1 solved.

the technical device is associated with a processing unit that communicates with an RFID reader stands. The RFID reader reads information from RFID transponders assigned to persons and contain personal information, and transfers that information to the processing unit. This evaluates the information and returns at a detected possible endangering a person who is in the service area of the technical device Warning signal off. In the simplest case, this is one visual and / or audible warning message, which is a person on a possible endangering should point.

From Of particular importance is that a person-dependent evaluation of the read Data dependent from the current operating data and a warning signal only in Case of need, that is, only in case of danger to a person. On the other hand, it is recognized that for a person no danger through the technical device is present, no warning signal is output. The output redundant, superfluous and possibly more irritating Information is therefore omitted. The use of RFID technology guaranteed a simple, reliable and at the same time very flexible data exchange at low cost Path.

These it is the technical device to a radiation-emitting device, which, for example, emits electromagnetic radiation or ultrasound, so is the security system according to an appropriate training such executed that in the presence of a warning signal, a radiation exposure at least is reduced. In this way, the radiation load can be to a value that is safe even for vulnerable people is.

Appropriately transmitted the processing unit the warning signal together with the personal Data to the technical device. The device In this case, it is preferably designed such that it is self-dependent in dependence the personal data changes its operating status.

In an appropriate training the issued warning signal is a control signal with which the Operating state of the technical device can be influenced. In order to is an adaptation of the operating state of the technical device to a endangering for one certain person reachable. For example, a power off of the technical device, combined with an operator lockout, feasible. That way is a danger and a possible health hazard a person in the catchment area of the technical device avoided.

In In one variant, the RFID transponder is reversible to a person assigned, for example in the form of a bracelet or a trailer. On one Such RFID transponders are information on implants and / or personal data storable. This can be done, for example, by persons in medical Treatment are parameters for a medical diagnostic device with which an investigation is to be carried out. That way are Medical examinations can be planned exactly in advance. By the The person assigned RFID transponder are confused with excluded from other persons.

Especially In the case of demented persons, there is a risk that these persons will be affected a bracelet, in which an RFID transponder is integrated, again remove. In such persons, it is therefore appropriate to the Implant RFID transponder, for example subcutaneously under the skin. This ensures the protection of such patients.

Advantageously, the RFID transponder on an adhesive layer, by means of which the RFID transponder with a body part of a person, in particular with glued to a finger or toenail. The RFID transponder is thus permanently connected to the patient. A surgical procedure is not required.

Prefers dissolves the RFID transponder automatically after some time from. Therefore this variant is especially useful at Can be used by a person over several times over a certain period of time with a technical Device is being examined, possibly a danger emanates.

In an appropriate training the RFID transponder is an implant or a prosthesis of a Person associated with captive or with the implant or the prosthesis inextricably linked. This may be, for example, a pacemaker, act a neurotransmitter or a metering pump. The RFID transponder In this case, in addition to personal data, information about the Implant, such as design, series or material combination on. The processing unit is arranged in such a manner based on the read To evaluate data, whether for a person is in principle a health hazard or if necessary only certain operating conditions of the technical device for this Person allowed are. For example, the valuation is based on a comparison with data stored in a database associated with the processing unit are deposited.

Prefers the processing unit is a visual display, in particular a Monitor, which displays alerts for people at risk. If it is a technical device operated by persons such as a medical diagnostic or therapy device, are preferred in addition information about personal data read and in the case of the presence of a vulnerable Person possible Effects on the operating state displayed.

The Task is still according to the invention solved by a method according to claim 10. Further advantageous embodiments are entitled to the subclaims directed to a method remove. These are the ones with regard to the security system to transfer mentioned advantages and preferred embodiments mutatis mutandis.

In According to a preferred development, the method is designed in such a way that that the control signal depends from the personal data a turning off the technical equipment causes, which is preferably combined with a Bedienungsperrung. In this way, on the one hand, a vulnerable person is safely protected. To the other is ensured by the operator lock that the technical device is not can be put back into operation. Another operation is only possible again when the endangered Person has left the catchment area of the technical device.

In Another embodiment is based on the personal data on the Control signal specified an operating state of the technical device and / or only certain operating states are permitted. These dates relate to various operating parameters, such as the radiation intensity at a radiation-emitting device. In order to it is ensured that the technical device is only in one operating condition operated by one who stays in his catchment area Person does no harm. For example, in the case of a heavily accelerated elevator the acceleration of the elevator and thus its speed so pretend that for a person traveling with the elevator potentially endangered person excluded any danger is.

In a purposeful enlargement of the method can be used in particular for medical diagnostic and therapy equipment Operating conditions, in particular Parameters for the irradiation, pretend. For example, these are the magnetic field strength or the alternating frequency of an electromagnetic field. In order to on the one hand becomes a possible one health hazard a person's account. On the other hand, there are certain Investigations with operating parameters that do not pose a health risk to this person, feasible.

following is an embodiment of Invention explained in more detail with reference to a drawing. The only figure shows a security system to detect a possible hazard to a person technical device.

The technical device 1 in the exemplary embodiment is a magnetic resonance tomograph and has a control and monitoring unit 2 on. This communicates via a communication line 3 with a processing unit 4 that is an RFID reader 5 having.

A person 6A is examined in the magnetic resonance tomograph. In the catchment area of the magnetic resonance tomograph, other persons hold 6B , C, D on. These have different types of RFID transponders 10B , C, D, from the RFID reader 5 can be read and on which personal information is stored.

The person 6B carries a pacemaker 12B to which the RFID transponder 10B is arranged. On this RFID transponder 10B are personal data and information about the design of the pacemaker 12B saved.

The person 6C wears a hip joint prosthesis 12C to which an RFID transponder 10C is arranged. On this RFID transponder 10C In addition to personal data, information about the design and the material combination of the hip joint prosthesis 12C saved.

The person 6D has a bracelet with the RFID transponder 10D on. On this RFID transponder 10D are personal data and information about all implants of the person, but also further information, such as drug intolerance or allergies, stored.

The structure of the magnetic resonance tomograph is shown schematically. The magnetic resonance tomograph has several magnets 13 on, in operation, a homogeneous magnetic field in the z direction of the coordinate system 17 generate and from a power supply 18 be fed. This homogeneous magnetic field causes a magnetization of the examination object, in this case the person 6A , In addition, gradient coil systems 19 provided by a gradient amplifier 21 be controlled and in all three spatial directions of the coordinate system 17 generate a magnetic field gradient. Further, a high frequency transmitting and receiving antenna 22 provided with a high-frequency transmission unit 23 and a radio frequency receiving unit 24 connected is. The radio frequency transmission unit 23 and the radio frequency receiving unit 24 are part of the high frequency system 25 in which the from the high frequency receiving unit 24 via the radio frequency antenna 22 received signals are sampled and demodulated. About an evaluation calculator 26 These signals are converted into image information and displayed on a monitor 27 shown.

The essential components of the safety system are an RFID transponder 10 , an RFID reader 5 and a processing unit 4 that with the device 1 interact. The operation of the security system is as follows:
as soon as one of the persons 6B , C, D with an RFID transponder 10B , C, D approaches the magnetic resonance tomograph, its RFID transponder from the RFID reader 5 read. The read information is sent to the processing unit 4 to hand over.

This processing unit 4 receives over the communication line 3 the information about the current operating state of the magnetic resonance tomograph. In addition, the processing unit includes 4 a memory 28 , in which is deposited, which operating condition for the read personal data is permissible. This setpoint for the operating state is used with the operating parameters for the current operating state in the processing unit 4 compared. The target specification may be that the magnetic resonance tomograph may not be in operation, or that certain limit values, in particular for the magnetic field strengths of the individual magnets, may not be exceeded.

In these cases, the processing unit generates a control signal W, S, via the communication line 3 to the control and monitoring unit 2 is handed over.

The control and monitoring unit 2 sets an optical reporting unit 30 , a warning lamp, and an acoustic reporting unit 31 , a horn, in operation and thus indicates a possible hazard to this person.

In addition, the control and monitoring unit 2 via communication lines 29 with the to the power supply 18 , the gradient amplifier 21 and the high frequency system 25 connected. Depending on the specification for the operating state, the field strengths of the magnets 13 , the gradient coil system 19 and the radio frequency transmission and reception unit 22 as well as the frequency of the high frequency system 25 either adjusted or the individual magnet systems are switched off.

As long as the person at risk 6B , C, D is located in the catchment area of the magnetic resonance tomograph, this is provided with an operator lock, so that an adjustment of the field strengths beyond the predetermined limits beyond or a renewed turning on or off the magnetic systems is not possible.

Will the investigation of the person 6A with operating parameters performed for the person 6B , C, D are harmless, so no control signal is generated. The examination of the person 6A will continue smoothly.

A rating will also apply to each person to be examined 6A performed before the start of an investigation if it has an RFID transponder. As already for people 6B , C, D, which are located in the catchment area of the magnetic resonance tomograph, is evaluated on the basis of the personal data read, whether a hazard to the person 6A and, if so, whether an investigation is only possible with certain operating conditions or not at all. If the examination can only be carried out with certain operating states, it is not possible to select other operating states. If the investigation is in principle a threat to the person, no investigation is possible. Exceeding given limits leads to an operating lock.

If there is a medical indication which makes it necessary to exceed limit values for the operating parameters, the operator lock can be set by entering a password on the evaluation computer 26 canceled and the investigation of the person 6A be performed.

In this way, a protection of all persons located in the catchment area of the magnetic resonance tomograph 6B , C, D guaranteed. Ongoing investigations will only be terminated if there is a potential health risk arising from personal data. In addition, the examination of even endangered persons is possible, as long as the operating parameters of the magnetic resonance tomograph correlating limits of the electromagnetic field strength are not exceeded.

The on the RFID transponders 10B , C, D stored personal data are on the monitor 27 displayed as information. So it is always understandable why an operator lock was triggered or why an investigation of the person 6B , C, D is feasible only with certain limits of the magnetic field strength.

On the on a bracelet 12D arranged RFID transponder 10D In addition to personal data, the operating parameters for an investigation to be carried out are stored. The person 6D is therefore examined with operating parameters of the magnetic resonance tomograph set in advance by a physician. Thus, a specification of examination methods is possible in advance of an investigation. These previously set operating parameters are also displayed on the monitor 27 displayed.

Claims (19)

Safety system to detect a possible hazard to a person ( 6B , C, D) by a technical device ( 1 ) with at least one RFID transponder ( 10B , C, D) with personal data, with at least one RFID reader ( 5 ) and with a processing unit ( 4 ) used to collect personal data with the RFID reader ( 5 ), the processing unit ( 4 ) is designed such that the personal data based on operating data of the device ( 1 ) on a possible danger to the person ( 6B , C, D) and that a warning signal (W, S) is output when a possible hazard has been identified. Safety system according to claim 1, wherein the technical device ( 1 ) is a radiation-emitting device and is designed such that in the presence of a warning signal (W, S), the radiation load is at least reduced. Security system according to claim 1 or 2, wherein the processing unit ( 4 ) with the technical device ( 1 ) is connected to the transmission of the warning signal (W, S) and the warning signal (W, S) contains information about the personal data. Security system according to one of claims 1 to 3, wherein the warning signal is a control signal (S) and the processing unit ( 4 ) is set up such that the operating state of the technical device ( 1 ) by means of this control signal (S). Security system ( 1 ) according to one of the preceding claims, wherein the RFID transponder ( 10D ) one person ( 6D ) is assigned reversibly. Security system ( 1 ) according to one of the preceding claims, wherein the RFID transponder ( 10B , C) a person ( 6B , C) is implanted. Security system ( 1 ) according to one of the preceding claims, wherein the RFID transponder has an adhesive layer, which allows bonding of the RFID transponder with a body part of a person, in particular with a finger or toenail. Security system ( 1 ) according to claim 7, wherein the adhesive layer of the RFID transponder dissolves after contact with organic material after some time. Security system ( 1 ) according to one of the preceding claims, wherein the RFID transponder ( 10B , C) captive on an implant ( 12B , C) the person ( 6B , C) and the RFID transponder ( 10B , C) Information about the implant ( 12B , C). Security system ( 1 ) according to one of the preceding claims, wherein a visual display for the warning signal (W) is provided. Security system ( 1 ) according to one of the preceding claims, wherein the technical device ( 1 ) is a medical diagnostic or therapeutic device, in particular a magnetic resonance tomograph. Procedure for determining a possible risk to a person ( 6B , C, D) by a technical device ( 1 ), wherein on at least one RFID transponder ( 10B , C, D) personal data stored with at least one RFID reader ( 5 ) and sent to a processing unit ( 4 ), the per personal data based on the operational data of the device for a possible hazard to the person ( 6B , C, D) are checked and whereby a warning signal (W, S) is output when a potential hazard is detected. Method according to claim 10, wherein the technical device ( 1 ) is a radiation-emitting device whose radiation load is at least reduced in the presence of a warning signal (W, S). Method according to claim 10 or 11, wherein the warning signal (W) with personal data to the device ( 1 ) and the personal data from the device ( 1 ) be evaluated. Method according to one of claims 10 to 12, wherein the warning signal is a control signal (S) and the operating state of the technical device ( 1 ) is changed by means of this control signal (S). Method according to one of claims 10 to 13, wherein, depending on the personal data, a switch-off and / or an operation lock of the technical device ( 1 ) is made. Method according to one of claims 10 to 14, wherein depending on the personal data only certain operating conditions of the technical device ( 1 ) be allowed. Method according to one of claims 10 to 15, wherein depending on the personal data operating parameters of the technical device ( 1 ) be adjusted. The method of claim 16, wherein depending on the personal data, the radiation parameters of a medical Diagnostic or therapeutic device be adjusted.