System for determining and displaying restrictions when operating medical station

Abstract

The invention relates to a system for determining and displaying restrictions during operation of an operating table, wherein the system comprises: a patient support device, in particular a surgical patient support device, for fastening to an operating table column of the operating table; a display unit for displaying information on restrictions when operating the operating table; an input unit for inputting information about the weight of the patient and / or an interface for receiving electronic patient weight information from outside the system; and an evaluation unit which is designed to determine a limit during operation of the operating table on the basis of at least the weight of the patient and to display the limit on the display unit before the patient is placed on the patient support device.

Description

Technical Field

[0001] The invention relates to a medical and surgical table in which a table top and / or sections of a table top are movable and in particular to a system which can determine and display the limits to be observed during operation of a medical table. Background Art

[0002] Operating tables are used to support patients, for example during surgical operations. Currently, due to the flexibility when setting up the operating table, the number of accessories and the different possibilities for patient positioning provided by the operating table, caregivers and doctors must pay attention to several important aspects in order to be able to use the operating table correctly. Some of these aspects are listed below:

[0003] - The accessories used should be adapted to the patient's weight.

[0004] - The configuration of accessories should also be coordinated with the patient's weight.

[0005] The patient support device on which the patient lies should only be moved within permitted limits.

[0006] - If there are movement restrictions, care should be taken not to exceed the permitted limits at any time.

[0007] When adjusting the operating table, make sure that it does not collide with external objects, such as a C-arm.

[0008] - Furthermore, when adjusting the operating table, care should be taken to ensure that the patient is properly secured and does not fall or slide off the operating table.

[0009] Important information on the points listed above is given in the operating table's instructions for use. When the operator ignores the instructions for use or does not pay adequate attention to collisions and the patient, the following dangerous events may occur:

[0010] - Tipping of the operating table: fall of the patient, which may result in permanent injury and even death.

[0011] - Overloading of components of accessories and the operating table: This can result in components being permanently bent or broken and can lead to permanent damage or even death of the patient.

[0012] - Overloading of the motorized articulation: results in restricted mobility, since the operating table cannot be moved.

[0013] - Collisions of the operating table with external objects: During movement, the operating table may collide with and damage expensive equipment, such as a C-arm.

[0014] - Falling of the patient: When the patient is not adequately immobilized, the patient may start to slide during table movements, which in the worst case may result in the patient falling to the ground.

[0015] The patient support device of an operating table can have replaceable, releasably connectable sections, such as, in particular, accessories. Usually, some or all of the replaceable sections are movable. By using different replaceable sections, a single operating table can be reconfigured in different ways for different patients and medical methods. In addition, individual sections or the entire patient support device can be adjusted in different ways. For example, individual sections or the entire patient support device can be tilted or tilted or moved in the longitudinal or vertical direction. However, this means that the size, shape, dimensions, weight and strength of the individual operating tables are different at different times. In order to prevent the operating table from tipping over or overloading of individual components or the entire operating table, the patient support device and its sections should only be adjusted within certain limits.

[0016] Currently, the operator has to check which type of movement is permissible in combination with the accessories depending on the workload, ie the weight of the patient and the weight of the accessories used.

[0017] In practice, the operator must obtain the accessories installed at the operating table and their technical data, such as weight, maximum load, and permitted combination with the operating table and / or other accessories, and manually calculate or estimate the current workload. Only then can the position limits of the operating table be determined.

[0018] Since there is no support by the operating table, the method is very error-prone due to the large number of different operating table configurations. Due to the complexity of the physical boundary conditions, it is difficult for the operator to correctly determine the actual limit values ​​specified in the manuals of the operating table and accessories.

[0019] The solution to the problem is to include all possible configurations of the operating table and their corresponding limits in a database. Since it is difficult to maintain such a database over the long service life of the operating table and the storage also consumes a lot of memory space on the embedded system, the implementation of such a database is very expensive not only for the equipment but also for the project resources. In order to make the database easy to maintain, the value ranges must also be discretized manually, which is also prone to errors. Discretization also leads to a less than ideal solution, limiting the reachable positions of the operating table more strongly than is necessary for the safety of the system and the patient. Summary of the invention

[0020] The object of the present invention is to provide a system which gives the operator feedback as to which limitations of the operating table exist even before the patient is placed on the patient support device.

[0021] According to a first aspect of the disclosure, a system is proposed, which is designed to determine and display limitations when operating an operating table. The system can have a patient support device, a display unit and an evaluation unit. In addition, the system can have an input unit and / or an interface for receiving electronic data.

[0022] The patient support device can be used as a part of an operating table and can be used to support a patient. The patient support device is arranged to be fastened to an operating table column of an operating table. In some designs, the patient support device can be a surgical patient support device, on which the patient is supported during a surgical operation. In addition, the patient support device can be used to fasten accessories. The patient support device can be modularly constructed and have a main support surface section, which can be extended by coupling various auxiliary support surface sections. The main support surface section and the auxiliary support surface section can have a mechanical connection element, by means of which the main support surface section and the auxiliary support surface section can be releasably connected. The auxiliary support surface section can be, for example, a leg, a foot, or a head section. In addition, the auxiliary support surface section can also be, for example, an extended section or an intermediate section embedded between the main support surface section and the head section. The main support surface section and the auxiliary support surface section can be installed at a slide rail or a side rail. The accessories can be releasably fastened to the slide rail or the side rail.

[0023] In some embodiments, the patient support device can be fixedly connected to the column of the operating table. The operating table can be movable. The support or base of the operating table can have wheels or rollers, by means of which the operating table can be moved on the ground. Alternatively, the support or base can be fixedly anchored to the ground.

[0024] In some embodiments, the patient support device can be designed so that it can be releasably connected to a movable surgical patient transporter and a column of an operating table. Before the surgical operation, the patient support device can be mounted on the patient transporter. The patient can be brought to the operating table by means of the patient transporter. There, the patient support device can be fastened to the operating table column and decoupled from the patient transporter. While the patient support device is mounted on the patient transporter, a large part of the preparation for the surgical operation can be carried out. The patient support device can, for example, be assembled from individual sections and components and can prepare the patient for the surgical operation. Only when the preparation is completed can the patient support device be fastened to the operating table column.

[0025] Information about the restrictions that should be followed when operating the operating table can be displayed by the display unit, for example in text form and / or graphical form. This allows the operator of the operating table to easily detect the restrictions. The display unit can display the information before the patient is placed on the patient support device.

[0026] The display unit can be integrated into a component of the system in the form of a display, such as a remote operating device of an operating table. The remote operating device can also display other information about the patient support device or the table device with the patient support device. The remote operating device can also receive inputs and instructions from the operator for controlling the patient support device or the table device with the patient support device. The display unit can also be a multi-purpose monitor or multi-purpose screen for an operating room. In addition, the display unit can be a monitor or screen, which is mounted at a ceiling suspension arm or at a wall of an operating room or other medical space. The same monitor or screen can also be used to display other information important to the integrated operating room (e.g., video, vital signs of the patient and / or information about lights, tables and other medical equipment). It is also conceivable that the display unit is integrated into the patient support device.

[0027] The operator can enter information about the weight of the patient supported or to be supported on the patient support device into the input unit. The input unit can be integrated, for example, into a remote control device, which optionally also displays the limits, into the patient support device or into a column that carries the patient support device. Additionally or alternatively, the system can have an interface for receiving electronic patient weight information from outside the system. The patient weight information can be stored, for example, in a database and transmitted from there to the system via the interface.

[0028] It can be provided that the weight information entered into the input unit or received electronically via the interface contains the actual weight of the patient, for example previously measured, or an estimated weight. Furthermore, a weight range or a minimum or maximum weight value can alternatively be entered into the input unit or received electronically via the interface. This can enable reliable operation of the operating table even when the actual weight of the patient is not sufficiently reliably known.

[0029] The evaluation unit can be designed to determine the limits when operating the operating table. The evaluation unit can determine the limits based at least on the weight of the patient. Weight information input into the input unit or weight information received electronically via the interface can be used as the patient weight. The limits can be displayed on the display unit. The evaluation unit can determine the limits before the patient is placed on the patient support device. Furthermore, the limits can also be displayed on the display unit before the patient is placed on the patient support device.

[0030] The information generated by the evaluation unit and displayed on the display unit informs the operator of the patient support device about the limitations of the patient support device during the planned operation. This saves the operator the time-consuming learning of the operating instructions for the patient support device.

[0031] In some embodiments, the evaluation unit can determine the limits, in particular limit values ​​or position limits, for the movement of the operating table or its parts by simulating the movement of the operating table with the patient supported thereon. For each joint about which a movement can be performed, the movement can be simulated and it can be checked in which area of ​​the joint no movement is allowed because the movement in said area would, for example, cause an increased risk of tipping or overloading of at least one part of the operating table due to the weight of the patient. In the same way, it can also be checked, for example, how far the patient support device can be moved longitudinally or laterally without the risk of tipping or overloading exceeding a preset threshold value. In a similar manner, all possible movements of the operating table and / or the patient support device and / or the operating table column can be checked by calculation. Areas with an increased risk of tipping and / or overloading can be excluded by determining suitable limits for operating the operating table.

[0032] If, instead of discrete weight values, a weight range is entered into the input unit or such a weight range is received via an interface, the evaluation unit can determine the limits for operating the operating table based on the weight range. For example, the evaluation unit can take into account the highest value of the weight range or the average value of the specified weight range to determine the limits. It is also conceivable to determine a plurality of different limits for the weight range, each of which relates to a specific patient weight and is displayed on the display unit in combination with the corresponding patient weight.

[0033] The simulation of the movement of the operating table and the limits derived therefrom during the subsequent operation of the operating table has the advantage that no manual determination of the limits is required for the operator. The automatic calculation of the permitted areas is less error-prone. Compared to a database containing all possible configurations of the operating table and its corresponding limits, the proposed solution has the advantage that the calculated limits are closer to the actual limits of the articulation. In addition, maintenance can be performed more simply and less time-consumingly and less error-pronely. New accessories do not necessarily have to cause a software update in the proposed solution as they do in the database solution.

[0034] In some embodiments, in addition to the patient's weight, one or more additional parameters may be used in order to determine limitations when operating the operating table from these parameters. This is explained further below.

[0035] The evaluation unit can be, for example, a hardware processor or other computer system or be integrated into a hardware processor or a computer system. The hardware processor or computer system can also perform other tasks in addition to the tasks of the evaluation unit. The evaluation unit can be arranged in an operating table and in particular in a patient support device. However, the evaluation unit can also be located outside the operating table, in particular outside the operating room. Because the simulation steps performed by the evaluation unit are computationally intensive, the evaluation unit can be located in a back end or a connection module. The evaluation unit can exchange data with an input unit and / or a display unit, for example, via one or more interfaces. Data transmission can be carried out, in particular, at least partially, via radio and / or wired.

[0036] In some embodiments, the evaluation unit can control individual components of the patient support device during operation of the operating table so that restrictions are followed, for example, the patient support device can be controlled so that the patient support device is tilted, tilted or moved longitudinally or vertically only within previously specified position limits. Alternatively, it can be proposed that the restrictions generated by the evaluation unit are only used to inform the operator of the restricted possibilities before the patient is placed on the patient support device. Alternatively, restrictions or limit values ​​can be used so that when the table movement reaches a calculated limit value or approaches a calculated limit value, a warning, an alarm and / or an automatic movement pause or stop is generated. The operator can also have the following feasible solution, continuing the movement beyond the calculated limit value. As long as the patient is placed on the patient support device, the load and the load center of gravity can be determined via measurement, for example with the help of a load sensor. The measurement results can be used to determine the restrictions to which the operating table is subject during subsequent operation.

[0037] In some embodiments, the evaluation unit determines the restrictions when operating the operating table not only based on the weight information, but also based on the identification and / or configuration of the patient support device. The identification of the support surface area can involve different sub-areas of the patient support device that can be releasably or fixedly connected to each other. For example, the patient support device can include the head, legs, arms and middle area and other suitable sub-areas. Through the identification, it can be known which sub-areas the patient support device includes. The configuration can, for example, indicate in what configuration or order or orientation the individual sub-areas are arranged. Each of the sub-areas can, for example, have one or more support surface sub-segments connected to each other.

[0038] The operating table can be extended with the aid of accessories in order to ensure optimal support of the patient and to enable reliable operation. The accessories can be releasably fastened to the operating table for different purposes. The accessories can be used, for example, to support specific body parts, such as the head, legs or arms. However, the accessories can also have other functions, for example, the accessories can be instrument tables, positioning supports for limbs or infusion holders fastened to the side rails of the patient support device. The main support surface section and the secondary support surface section can also belong to the accessories.

[0039] In some embodiments, a detection unit can be provided for detecting accessories mounted on an operating table and in particular a patient support device. In order to detect the accessories, a signal can be transmitted from the accessories to the detection unit. The signal can contain information about the respective accessory, which allows the detection unit to identify the respective accessory. The signal used for detecting the accessories can be, for example, an electrical or optical signal or a radio signal.

[0040] The detection unit can have a suitable receiving unit for receiving signals from the accessory. In addition, the detection unit can have or be integrated into a hardware processor or another computer system, which can realize the identification of the accessory. The detection unit can be arranged in the operating table and in particular in the patient support device or outside the operating table.

[0041] The detection unit can inform the evaluation unit which accessories are mounted on the operating table and in particular on the patient support device. In some embodiments, the evaluation unit can use this information in addition to the weight information and optionally further information to determine limitations when operating the operating table by simulating the movement of the operating table.

[0042] In some embodiments, the input unit and / or the interface for receiving the patient weight information can be designed so that the planned position that the patient is to assume on the patient support device and / or the planned center of gravity of the patient on the patient support device can be input into the input unit and / or received from the interface. For example, the input unit can include a touch screen that graphically displays the operating table or the patient support device. The operator can move a graphical slider to the position at which the center of gravity of the patient is to be located later. It is also conceivable that the input unit displays the different positions that the patient can assume on the patient support device on the touch screen and the operator selects the relevant position.

[0043] In some embodiments, the evaluation unit can take into account a planned position that the patient is to assume on the patient support device and / or a planned center of gravity of the patient on the patient support device when ascertaining the limitations during operation of the operating table.

[0044] In some embodiments, the limitation may be related to the movability of the patient support device and in particular the displacement and removal of a section of the patient support device and / or the displacement and removal of the operating table column. In principle, the patient support device or a section of the patient support device can be tilted and / or tilted and / or moved longitudinally and / or laterally and / or, in particular, adjusted in height by means of the operating table column. The tilt (English: trend) of the patient support device is also called Trendelenburg tilt, in which the patient is supported so that the patient's head is at the bottom and the patient's pelvis is at a very high level. In the reverse Trendelenburg tilt, the patient's head is supported high and the pelvis is at a very low level. Tilt (English: tilt) means that the patient support device is tilted toward the side. Tilt or tilt the patient support device around one or more hinges. The limitation may be related to the scale of the tilt and / or tilt and / or longitudinal and / or lateral mobility. Depending on which support surface sub-sections are connected to the support surface main section, other limitations on the displacement and removal of the support surface sub-sections can be obtained. The limitation of the movability of the patient positioning device can relate to the movement of the entire patient positioning device and / or to the individual movement of the support surface subsection or at least a section of the patient positioning device and / or to the movement of the operating table column.

[0045] In some embodiments, the limitations in the operation of the operating table can be indicated at least by an area within which a movement of the operating table, in particular a patient support device and / or at least a section of the patient support device and / or an operating table column is permitted. Such an area can be displayed on the display unit, for example graphically. Furthermore, position limits can also be displayed on the display unit.

[0046] In some designs, limitations in operating the operating table may include one or more of the following limitations:

[0047] - restrictions in the selection of the axis so that a movement of the patient support device and / or at least a section of the patient support device is possible; for example, a movement of the patient support device or a support surface subsection about a specific axis is not permitted;

[0048] - limitation of the area within which the patient support device and / or at least one section of the patient support device can be moved about an axis;

[0049] - a limitation of the speed with which the patient support device and / or at least one section of the patient support device can be moved about the axis;

[0050] - Restriction when the patient support device is tilted;

[0051] - Restriction when the patient support device is tilted;

[0052] - restrictions on longitudinal movement of the patient support device;

[0053] - restrictions on lateral movement of the patient support device;

[0054] - limitations on the height adjustment of the patient support device, which can be performed in particular by the operating table column;

[0055] - restrictions on the rollers when removing the operating table; and / or

[0056] -Limitations when it comes to motorized transport of operating tables.

[0057] In some embodiments, the evaluation unit determines a limitation in the operation of the operating table in such a way that tipping over of the operating table and / or overloading of the operating table and / or at least one component of the operating table is prevented. For example, the area in which the patient support device or at least one section of the patient support device and / or the operating table column can be adjusted can be limited, or the movement of the operating table and / or the patient support device and / or the operating table column can be blocked in order to prevent tipping over or overloading.

[0058] In some embodiments, the evaluation unit simulates a plurality of positions that the operating table can assume during a predetermined movement. The evaluation unit checks whether a restriction in the respective position is necessary, in particular whether there is a risk of tipping over of the operating table and / or a risk of overloading the operating table and / or at least one component of the operating table. The smaller the spacing between adjacent positions checked by the evaluation unit, the more finely the restriction can be selected. However, a smaller spacing between adjacent positions also results in an increased computational effort for the simulation.

[0059] In some embodiments, the evaluation unit can determine a residual tipping moment about a preset tipping point for a plurality of positions that the operating table can assume during a preset movement. In addition, the evaluation unit can compare a specific residual tipping moment with a preset residual tipping moment threshold for each of the positions. If the residual tipping moment in one of the positions is below the preset residual tipping moment threshold, the evaluation unit can determine a tipping risk for the position and can also determine that access to the position is not permitted during subsequent operation of the operating table.

[0060] In some embodiments, the display unit can display information about at least one limitation in the operation of the operating table when the evaluation unit has determined a risk of tipping for one or more positions of the operating table.

[0061] In some embodiments, the evaluation unit can determine the residual tipping moment based on the total load and / or the center of gravity of the total load. The residual tipping moment can also be related to a specific tipping point or multiple tipping points.

[0062] The total load is the load resulting from the entire operating table, the patient supported on the operating table, accessories fastened to the operating table and other external forces.

[0063] The tipping point is a point or, if applicable, an axis about which the operating table can be tipped. For example, the tipping point can be located at the lower side edge of the foot that faces the ground. Furthermore, the tipping point can be characterized by pulleys, by means of which the operating table can be moved on the ground.

[0064] In some designs, the pouring points may be defined as all points along the circumference of the foot or leg that face the ground below (and in some cases touch the ground). For example, all points along the circumference of a rectangular foot may be pouring points. In other designs, such as when the leg has a less regular shape, the pouring points may be defined as all points along the edges of a notional or imaginary polygon defined by the far corners of the leg. In the case of an H-shaped base, the pouring points are, for example, the four corners of the H and the edges of the notional rectangle formed by the four corners of the H. In the case of a circular base, every point on the circumference is a pouring point.

[0065] Generally speaking, it can be said that when the center of gravity of the total load is above the surface bounded by the tipping point, the operating table remains stable. However, when the center of gravity of the total load is not directly above the surface, the operating table tips over.

[0066] The residual tipping torque at the tipping point can be determined by multiplying the distance between the tipping point and the center of gravity of the total load by the total load, where the total load is specified as a force. The residual tipping torque is called "residual tipping torque" in English professional literature. When the specific value for the residual tipping torque is positive, this means that the operating table is stable about the tipping point. When the residual tipping torque is negative, the operating table tips over. The larger the value of the residual tipping torque, the more stable the operating table. In some designs, a residual tipping torque threshold value with a value of 225 Nm, for example, is preset. This means that the residual tipping torque should not be less than 225 Nm. If it is below the residual tipping torque threshold value, the evaluation unit can determine that the position of the operating table should be blocked.

[0067] In some embodiments, the evaluation unit can determine a corresponding residual tipping moment at each position or at a plurality of positions that the operating table can occupy during a preset movement, for a plurality of tipping points, in particular for all possible tipping points. The evaluation unit can compare the plurality of residual tipping moments with a residual tipping moment threshold value in each case. If only one of the tipping moments is below the residual tipping moment threshold value in a specific position of the operating table, the evaluation unit can design a restriction so that the position in question is in a non-permitted region.

[0068] In some embodiments, at least one virtual or imaginary line can be preset. The at least one virtual line can, for example, pass through at least one tipping point and can also, for example, enclose a preset angle, a so-called stability angle, with a preset normal vector. The evaluation unit can determine the position of the load center of gravity of the operating table, for example the center of gravity of the total load, with respect to the at least one preset virtual line for a plurality of positions that the operating table can assume during a preset movement. If the load center of gravity of the operating table passes through the at least one virtual line in a position, the evaluation unit can determine a tipping risk for the position and exclude the position for subsequent operation of the operating table.

[0069] In particular, the evaluation unit can indicate a tipping risk when the center of gravity of the total load passes through at least one virtual line in the direction of the reduction of the residual tipping moment. The virtual line can also be shifted in parallel and correspondingly not extend through the tipping point. In this case, the center of gravity of the total load must also be shifted accordingly in order to be able to indicate a tipping risk.

[0070] When the operating table is standing on a flat, non-inclined ground, the normal vector can be defined, for example, by the vector of the weight of the operating table. The normal vector is then oriented perpendicular to the ground. The normal vector can also be defined, for example, by the base of the footrest or by the patient support in the normal position. The normal vector is then oriented perpendicular to the base of the footrest or to the patient support in the normal position.

[0071] In some designs, at least one virtual or imaginary line can be preset for each of a plurality of tipping points, in particular for all possible tipping points, the line passing through the corresponding tipping point and enclosing a preset angle, a stability angle, with a preset normal vector. A plurality of virtual lines define a space. As long as the center of gravity of the total load is within the space, there is no risk of the operating table tipping over. The operating table can only tip over when the center of gravity of the total load leaves the space defined or bounded by the virtual lines. If the center of gravity of the total load leaves the space defined by the virtual lines, the evaluation unit can determine the tipping risk for the position and display to the operator that the position should be excluded for subsequent operation of the operating table.

[0072] In some embodiments, the predetermined stability angle that can be enclosed by a virtual or imaginary line of the pouring point and a predetermined normal vector can be related to the nature of the pouring point. For example, the stability angle can be greater when the pouring point is defined by a pulley. In contrast, the stability angle can be smaller when the pouring point does not include a pulley, but is, for example, located at the lower side edge of the leg.

[0073] In one design, when the pouring point is given by a pulley, a stability angle of 10 degrees can be selected. In all other pouring points, especially rigid bases or support structures, a stability angle of 5 degrees can be selected.

[0074] In some designs, the stable angle is at least 2 degrees or at least 5 degrees or in the range of 5 to 15 degrees or in the range of 3 to 20 degrees. In some designs with retractable wheels or rollers, the stable angle is at least 2 degrees when the operating table is standing on the ground, and the stable angle is at least 8 degrees when it is standing on wheels or rollers. Certain safety regulations require that the medical table remain stable at a tilt of 5 degrees when it is standing directly on the ground, and remain stable at a tilt of 10 degrees when the medical table is standing on wheels. The technology helps to meet such safety regulations, but is not limited to the purpose.

[0075] The two above-mentioned embodiments of comparing the residual tipping moment with a residual tipping moment threshold value or checking whether the center of gravity of the total load passes through at least one virtual line can be used independently of one another to produce a limitation during operation of the operating table. In addition, the two methods can also be combined with one another.

[0076] In some embodiments, the evaluation unit can determine, based on the patient weight and / or the patient's center of gravity, whether there is a risk of overloading for the operating table and / or at least one component of the operating table. In particular, the evaluation unit can determine, for a plurality of positions or also for all positions that the operating table can assume during a predefined movement, whether there is a risk of overloading. As described above, the center of gravity of the patient can be input into the input unit, for example, by an operator. If there is a risk of overloading, the display unit can indicate to the operator by displaying restrictions that the movement feasibility of the operating table and / or the patient support device is correspondingly limited and that the operating table should not or cannot assume a position involving a risk of overloading during operation.

[0077] By following the corresponding limits, it is possible to prevent components of the operating table from being damaged, for example bent or even broken, due to excessive loads acting on the operating table, thereby also avoiding dangers to the patient.

[0078] The at least one component of the operating table for which the overload risk is determined can be, for example, a main support surface section or a secondary support surface section of a patient support device or other accessories or other components of the operating table, such as rollers or an operating table column.

[0079] In one embodiment, the evaluation unit can compare the load, in particular the effective load, acting on the operating table and / or the patient support device with at least one preset overload threshold and determine that there is a risk of overloading the operating table and / or at least one component of the operating table when the load exceeds at least one overload threshold.

[0080] At least one overload threshold value can be specific to the operating table and / or at least one component. Thus, an individualized overload threshold value can be used for each component of the operating table. This makes it possible to determine the overload risk for components of different stability.

[0081] The evaluation unit can compare the load acting on the operating table and / or the patient support device with at least one preset overload threshold value for a plurality of positions or also for all positions that the operating table can assume during a preset movement. If there is a risk of overload, the evaluation unit can correspondingly limit the movement feasibility of the operating table and / or the patient support device by suitably selecting the limitation.

[0082] In addition to the possible overload risk for the configuration of individualized support surface segments and support surface sub-segments, the overload risk for specific segments or regions of the patient support device can also be determined. The region can, for example, extend along the outer limit of the support surface sub-segment. In this case, the region includes a specific number of support surface sub-segments. However, it is also conceivable that the region limit does not extend along the outer limit of the support surface sub-segment. In this case, a part of the support surface sub-segment can belong to one region, while the rest of the support surface sub-segment belongs to an adjacent region. In some designs, at least a part of the patient support device can therefore be virtually or imaginarily divided into multiple regions and an overload threshold can be preset for each region. The evaluation unit can check for multiple positions or also for all positions that the operating table can occupy during the preset movement, in which region the center of gravity of the load acting on the operating table and / or the patient support device is located, and when the load exceeds the overload threshold preset for the region, the overload risk can be determined. If there is an overload risk, the evaluation unit can select a restriction so that the limited movement feasibility of the operating table and / or the patient support device is displayed to the operator.

[0083] In addition, an image or curve extending along at least a portion of the patient support device can be preset. A corresponding overload threshold is preset at each position of at least a portion of the patient support device by means of the image or curve. The image or curve can be, for example, a straight line. In particular, the straight line can descend toward the distal end section of the patient support device, so that the overload threshold is smaller toward the end of the patient support device. The evaluation unit can check, for multiple positions or also for all positions that the operating table can occupy during the preset movement, at which position of the patient support device the center of gravity of the defined load is located. However, this does not necessarily mean that the center of gravity of the defined load is located within the patient support device. The center of gravity can also be located outside the patient support device. In this case, the corresponding position of the patient support device can be obtained, for example, by a vertical projection of the center of gravity onto the patient support device. The evaluation unit can compare the defined load, in particular the effective load, with the overload threshold preset for the determined position, and if the defined load exceeds the overload threshold preset for the position, the restriction can be adjusted so that it is displayed to the operator that the operating table is not allowed to occupy the corresponding position during operation.

[0084] In some embodiments, the system can have at least one drive for moving the operating table. The evaluation unit can determine the load acting on the at least one drive for a plurality of positions or also for all positions that the operating table can assume during a preset movement based on the patient weight and / or the patient's center of gravity, and can determine an overload risk when the load exceeds at least one preset overload threshold value specifically for the at least one drive. If there is an overload risk, the evaluation unit can correspondingly limit the movement feasibility of the operating table and / or the patient support device by appropriately selecting the limitation and display this to the operator.

[0085] The drive can be, in particular, an electric drive, which is used, for example, to adjust the patient support device or individual components of the patient support device, in particular to tilt, tilt, move or raise the patient support device. In addition, the operating table can include a plurality of drives. For each of the drives, an individualized overload threshold value can be specified specifically for the respective drive. In this way, an individualized overload risk for the drive can be specified.

[0086] According to a second aspect of the disclosure, a method is provided, which is designed to determine and display limitations when operating an operating table. According to the method, information about the weight of the patient can be input into an input unit and / or electronic patient weight information can be received at an interface from outside the system. Limits when operating an operating table can be determined based on at least the patient weight. Before the patient is placed on a patient support device, in particular a surgical patient support device, the limitations can be displayed on a display unit. The patient support device can be configured to be fastened to an operating table column of an operating table and also fastened to the operating table column.

[0087] In some embodiments, limitations in the operation of the operating table can be determined based on at least the weight of the patient by simulating the movement of the operating table with the patient supported thereon.

[0088] The method according to the second aspect can have all the embodiments that were described in the above disclosure in connection with the system according to the first aspect.

[0089] The present disclosure also includes circuits and / or electronic instructions for controlling an operating table, as well as a remote operating device, a display device, and a user interface, especially electronic devices and software, for use with an operating table and for performing the methods and functions described in the disclosure, which can all implement the contents described in this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] The exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The accompanying drawings show:

[0091] Figure 1 A schematic side view showing an operating table with a patient positioned on a patient support device of the operating table;

[0092] Figure 2 A schematic diagram showing the architecture of a system according to the present disclosure for determining and displaying limitations when operating an operating table;

[0093] Figure 3 A schematic diagram showing an operating table according to the present disclosure for illustrating measured load, effective load, total load and working load;

[0094] Figure 4 A schematic diagram showing a flow chart for determining limitations when operating an operating table according to the present disclosure;

[0095] Figure 5A and Figure 5B A schematic diagram showing an operating table according to the present disclosure in a locked or unlocked position with a dump point;

[0096] Fig. 6A and Figure 6B A schematic diagram of an operating table according to the present disclosure showing the center of gravity of the total load in or out of the upright plane at the dump point;

[0097] Figure 7 A schematic diagram showing a surgical table according to the present disclosure with a virtual 5 or 10 degree line;

[0098] Figure 8 A schematic diagram of an operating table according to the present disclosure showing the load-bearing capacity of individual components;

[0099] Fig. 9 A schematic diagram showing an operating table according to the present disclosure having a configuration consisting of extended sections;

[0100] Fig. 10A and Fig. 10B A schematic diagram showing an operating table according to the present disclosure having sectionally or point-different load limits; and

[0101] Fig.11 Schematic diagram showing an operating table according to the present disclosure in an extreme Trendelenburg position. DETAILED DESCRIPTION

[0102] In the following description, exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings, which are not necessarily to scale but rather merely schematically illustrate the corresponding features.

[0103] It should be noted that the features and components described below can be combined with each other, regardless of whether they are described in conjunction with a single embodiment. The combination of features in the respective embodiments is only used to illustrate the basic structure and working principle of the device claimed.

[0104] In the figures, identical or similar elements are provided with the same reference symbols wherever this is useful.

[0105] Figure 1 A mobile operating table 10 is schematically shown, which can be used to support a patient 12 during a surgical operation and to transport the patient. The mobile operating table 10 comprises, from bottom to top, a support 14 for placing the operating table 10 on the ground, a vertically arranged operating table column 16 surrounding the support 14, and a patient support device 18 fastened to the upper end of the operating table column 16. The patient support device 18 can be fixedly connected to the operating table column 16 or alternatively can be releasably fastened to the operating table column 16.

[0106] The patient support device 18 is modularly designed and is used to support the patient 12. The patient support device 18 comprises a main support surface section 20 connected to the operating table column 16, which can be expanded as desired by coupling various auxiliary support surface sections. Figure 1 In FIG. 1 , a leg section 22 , a shoulder section 24 and a head section 26 are coupled to the bearing surface main section 10 as bearing surface auxiliary sections.

[0107] The patient support device 18 of the operating table 10 can be placed at a suitable height and can be both tilted and inclined, depending on the type of surgical procedure to be performed.

[0108] The operating table column 16 is designed to be height-adjustable and has an internal mechanism for setting the height of the patient support device 18 of the operating table 10. The mechanism is arranged in a housing 28, which protects the components from contamination.

[0109] The foot support 14 has two sections 30, 32 of different lengths. Section 30 is a short section associated with the foot end of the leg section 22, i.e., the end of the patient support device 18 where the foot of the patient 12 to be treated is located. Section 32 is a long section associated with the head section 26 of the patient support device 18.

[0110] Furthermore, the support 14 can have wheels or rollers, by means of which the operating table 10 can be moved on the ground. Alternatively, the support 14 can be fixedly anchored to the ground.

[0111] For better illustration, Figure 1 The Cartesian coordinate system XYZ is recorded in . The X-axis and the Y-axis are horizontal axes, and the Z-axis is the vertical axis. The X-axis extends along the supporting surface subsections 22, 24, 26 arranged side by side.

[0112] Figure 2 The system architecture of a system 100 according to the present disclosure for determining and displaying limitations when operating an operating table 10 is schematically shown. The system 100 is a system according to the first aspect of the present disclosure and can be operated by means of a method according to the second aspect.

[0113] System 100 may include Figure 1 1 and the patient support device 18 shown in the figure and in particular further components of the operating table 10 or the entire operating table 10. In addition, the system 100 has a load sensor device 102, a load determination unit 104, a safety unit 106, a monitoring and calibration unit 108, a data memory 110, further components 112 of the operating table 10, an input unit 114, an interface 115 and a display unit 116. In addition, the safety unit 106 contains an evaluation unit 117. A further component of the further components 112 of the operating table 10 is a detection unit 118.

[0114] The load sensor device 102 includes a plurality of load sensors and is designed to measure at least one variable from which the load acting on the load sensor device 102 can be determined. In the present case, the load sensors are force sensors, which each measure the force acting on the respective sensor. The force values ​​measured by the individual force sensors are output by the load sensor device 102 as signals 120 in digital form. In addition, the load sensor device 102 includes electronic components, which are required for operating the force sensors.

[0115] The load determination unit 104 receives the signal 120 with the measured force value and determines therefrom the expected load and / or the load center of gravity. In particular, the load determination unit 104 can determine the measured load, the effective load, the working load and / or the total load and the associated load center of gravity. The load determination unit 104 can determine the expected load and / or the load center of gravity during the entire operation of the operating table 10, that is, the load determination unit 104 can already measure values ​​for the load and / or the load center of gravity before the patient is placed on the patient support device 18 and also after the patient is supported on the operating table 10. In addition, the load determination unit 104 can determine corresponding values ​​when accessories are added to the operating table 10 or when the operating table 10 is adjusted in order to position the patient for surgery.

[0116] In order to be able to process and analyze the force values ​​provided appropriately, the load determination unit 104 requires some data about the geometry and mass or weight of the operating table 10 and the accessories. The data are stored in a data memory 110 and are provided to the load determination unit 104 by means of a signal 122. In particular, information about the mass and center of gravity of the individual components of the operating table 10 and the accessories can be extracted from the data. The data memory 110 can be expanded via a communication module of the operating table 10.

[0117] Load determination unit 104 generates as output signal a signal 124 containing information about the specific load and the center of gravity of the load. This information is transmitted to safety unit 106, where all available data including load, center of gravity and position data of operating table 10 and accessories detected by operating table 10 are evaluated.

[0118] The safety unit 106 determines whether the operating table 10 is safe or whether the operating table is in a dangerous situation. The safety unit 106 generates a safety signal 126, which indicates whether the operating table 10 is in a safety-critical state. A safety-critical state may exist, for example, when there is a risk of the operating table 10 tipping over or individual components of the operating table 10 being overloaded.

[0119] The algorithm reacts accordingly depending on the severity of the identified situation. For example, the operating table 10 can only output a warning or stop the movement. The warning can be made via an acoustic or optical signal through the operating table 10 or in text form via a remote control device. The measures can vary from slowing down the movement speed to stopping the movement to blocking some functionality and continue until the operating table 10 is in a safe state again.

[0120] It may be provided that the safety function can be deactivated by the operator at any time and the operator assumes the risk of the movement of the operating table 10 himself.

[0121] Since the system should reliably detect critical situations, the system also has a monitoring and calibration unit 108. The software module checks the plausibility of the measured values ​​and detects whether the system is working incorrectly or whether a calibration or adjustment of the system is required. The monitoring and calibration unit 108 generates corresponding output signals 128, 130, which are transmitted to the load determination unit 104 or the component 112 of the operating table 10.

[0122] The components 112 of the operating table 10 continuously generate position data, data for setting the individual components, and information about accessories detected by the operating table 10. These data are made available to the system by means of a signal 132.

[0123] Furthermore, the system 100 is designed to provide the operator with information, even before the patient is placed on the patient support device 18 , about the possible limitations of the operating table 10 when the patient is located on the operating table 10 .

[0124] In order for the system 100 to be able to determine the limits when the patient is not on the operating table 10 , information about the patient's weight must be provided to the system 100 . The operator can enter this information into an input unit 114 , which is integrated into a remote control device for controlling the operating table 10 , for example.

[0125] Furthermore, information about the weight of the patient can also be received electronically from the interface 115 . The patient weight information can be stored in a database, for example, and transmitted from there to the system 100 via the interface 115 .

[0126] The patient weight information entered by the operator into the input unit 114 or received from the interface 115 is supplied to an evaluation unit 117 integrated into the safety unit 106 .

[0127] The evaluation unit 117 determines the limitations to which the operating table 10 is subjected during subsequent operation with the patient supported on the patient support device 18 based on the patient weight information. The evaluation unit 117 determines the limitations by simulating the movement of the operating table 10 with the patient supported thereon. The evaluation unit 117 can determine the limitations even before the patient is placed on the patient support device 18.

[0128] The limitations can be displayed on the display unit 116. For this purpose, the evaluation unit 117 transmits a signal 134 to the display unit 116 containing the limitations determined by the evaluation unit 117. Before the patient is placed on the patient support device 18, the limitations can be displayed on the display unit 116. The information displayed on the display unit 116 informs the operator of the operating table 10 which limitations the operating table 10 is subject to during the upcoming operation.

[0129] The display unit 116 can display information about the limitations of the operating table 10 during operation in text form and / or graphics. The display unit 116 is integrated, for example, in the form of a display in a remote control device of the operating table 10. In addition, the display unit 116 can also have a monitor that is arranged in the operating room and constantly display to the operator during operation which limitations of the operating table 10 exist.

[0130] Evaluation unit 117 or other units of safety unit 106 can control individual components of operating table 10, in particular patient support device 18 and operating table column 16, during operation of operating table 10 so that restrictions are observed. For example, movements of operating table 10 beyond the permitted range can be prohibited and / or a warning indicating the departure from the permitted range can be generated.

[0131] In addition to the patient weight information, the evaluation unit 116 can use further information in order to ascertain limitations when operating the operating table 10 . This information includes information about the identification and / or configuration of the patient support device 18 and accessories mounted on the operating table 10 .

[0132] The detection unit 118 is designed to determine which accessories are mounted on the operating table 10 and in particular the patient support device 18. In order to detect the accessories, a signal can be transmitted from the accessories to the detection unit 118. The signal can contain information about the respective accessories, which allows the detection unit 118 to identify the respective accessories. The signal used for detecting the accessories can be, for example, an electrical or optical signal or a radio signal. Thus, the detection unit 118 can determine in particular which support surface segments are connected to each other in what order and which other accessories are mounted on the operating table 10.

[0133] The detection unit 118 informs the evaluation unit 117 which accessories are mounted on the operating table 10 and in particular the patient support device 18. In addition, the evaluation unit 117 can read data about the geometry and mass or weight and center of gravity of the accessories from the data memory 110. In addition to the weight information, the evaluation unit 117 uses this information to simulate the movement of the operating table 10 and to determine from the simulation the limitations when operating the operating table 10.

[0134] In some embodiments, at least one drive device may be provided for moving at least a portion of the patient support device 18 relative to other portions of the system 100 and / or relative to other portions of the patient support device 18 .

[0135] Figure 3 The schematic diagram illustrates different loads that the load determination unit 104 may determine based on the data provided by the load sensor unit 102. In particular, the load determination unit 104 may determine a measured load, a useful load, a total load and a working load.

[0136] exist Figure 3 The measured load denoted by reference numeral 140 is the load acting on the load sensor device 102. The measured load corresponds to the load generated on the load sensor by all persons, objects and forces acting on the operating table 10. The measured load corresponds to the load value measured by the load sensor device 102 which may be arranged in the operating table column 16.

[0137] The effective load 142 corresponds to the load caused and acting on the operating table 10 by components not associated with the operating table 10 and by personnel and external forces. The influence of components associated with the operating table 10 and the identified accessories remains unconsidered in the effective load. Only the remaining components of the operating table 10, that is, the components not associated with the operating table 10, contribute to the effective load. This can be, for example, an accessory that is not identified by the operating table 10. In addition, the patient on the operating table 10 contributes to the effective load. In addition, all forces acting on the operating table 10 from the outside contribute to the effective load, which forces are applied to the operating table 10 by personnel and / or objects outside the operating table 10, for example. In principle, the effective load is the measured load without the influence of known objects such as tabletop components, identified accessories, etc.

[0138] Total load 144 is the load resulting from the measured load and the load caused by components that are associated with operating table 10 and are below load sensor device 102. Thus, total load takes into account the load of components that are below load sensor device 102 and cannot be measured by load sensor device 102 and therefore do not contribute to the measured load. Thus, total load is the load resulting from the entire operating table 10, the patient, components associated with operating table 10, components not associated with operating table 10, and other external forces.

[0139] Furthermore, a workload consisting of the weight of the patient and the weight of the accessories used can be defined.The weight of the patient support device 18 consisting of the individual accessories can be included in the workload.

[0140] Figure 4 A flow chart 200 is shown which illustrates the various steps for determining and displaying limits that are present during operation of the operating table 10. Before a patient is placed on the patient support device 18, the steps described below can be performed.

[0141] In step 201 , the operator initiates the execution of the method for determining and displaying limitations by actuating a corresponding input button of remote control device 150 .

[0142] In step 202 , the operator is requested to enter the weight of the patient to be supported on the patient support device 18 into the remote control device 150 by a corresponding display on the display of the remote control device 150 .

[0143] In step 203 , the operator enters the patient's weight into the telecontrol device 150 . Furthermore, it can be provided that the operator enters the center of gravity or the approximate lying position that the patient will subsequently assume on the operating table 10 into the telecontrol device 150 .

[0144] In step 204 , the telecontrol device 150 transmits the patient's weight and, if applicable, the patient's center of gravity or lying position to the evaluation unit 117 . The telecontrol device 150 also causes the evaluation unit 117 to perform a preliminary check of the operating table 10 and to determine the limits that apply during operation of the operating table 10 .

[0145] In step 205, detection unit 118 determines which accessories 151 are mounted on operating table 10. This information is transmitted to evaluation unit 117. Evaluation unit 117 can also extract further information about accessories 151, in particular their mass and / or center of gravity, from data memory 110.

[0146] In step 206, the evaluation unit 117 simulates the movement of the operating table 10, taking into account the patient weight input by the operator into the telecontrol device 150 and the attachment 151 detected by the detection unit 118 and, if necessary, the center of gravity or lying position of the patient. In particular, it can be checked during the simulation whether the risk of tipping over or the risk of overloading exceeds a corresponding preset threshold value in one or more specific positions that the operating table 10 can occupy during operation. For each joint around which a movement can be performed, the movement is simulated and checked in which area of ​​the joint is not allowed to move, because this, for example, due to the patient weight and / or the patient's center of gravity or lying position, will cause an increased risk of tipping over or overloading of at least one component of the operating table 10. In addition, it can be checked how far the patient support device 18 can be moved longitudinally or laterally without the risk of tipping over or the risk of overloading exceeding a corresponding preset threshold value. In a similar manner, all possible movements of the operating table 10 and / or the patient support device 18 can be checked by calculation. Areas with an increased risk of tipping and / or overloading can be excluded by determining lower and upper limits for each joint. Limitations in the operation of the operating table 10 are thus determined.

[0147] The simulation of the movement of the joints and other components of the operating table 10 in step 206 can consist of individual steps. Each step can relate to a specific position of the operating table 10, that is to say a specific position of the joints. In each position, it can be checked by calculation whether the risk of tipping or the risk of overloading exceeds a corresponding preset threshold value. Thereafter, further positions of the operating table 10 are checked. The method is performed iteratively. Therefore, step 206 consists of individual steps that are performed in multiple iterations. Figure 4 The iterative execution of the simulation is marked by reference numeral 207 .

[0148] In step 208 , the evaluation unit 117 transmits the restrictions to the remote control device 150 .

[0149] In step 209 , the remote operating device 150 displays the restrictions to the operator on a display of the remote operating device 150 .

[0150] An exemplary algorithm is described below, which is used by evaluation unit 117 in order to simulate the movement of operating table 10 and to determine in which positions there is an increased risk of tipping and / or overloading.

[0151] Figure 5A and Figure 5B The operating table 10 is shown from the side and from the front. Figure 5A In the embodiment shown in FIG. 3 , the operating table 10 is in a lowered or locked position, that is, the legs 14 stand upright on the ground, so that the operating table 10 cannot be moved. In this position, the lower side edges of the legs 14 facing the ground are shown as tipping points 310, around which the operating table 10 can be tipped.

[0152] exist Figure 5B In the position, the operating table 10 is in a non-locked position, that is, the operating table 10 stands on the pulleys 312 and can move on the ground. In the position, the possible dumping point 310 is given by the pulleys 312.

[0153] In principle, the operating table 10 is stable as long as the center of gravity COG of the total load is in the vertical plane of the tipping point 310, that is to say directly above the surface bounded by the tipping point 310. Fig. 6A When the center of gravity COG of the total load is not directly above the vertical surface of the tipping point 310, as shown in FIG. Figure 6B As shown, the operating table 10 could then tip over.

[0154] The evaluation unit 117 can determine the residual tipping moment M at the tipping point 310 during the simulation for a specific position of the operating table 10 . r , by setting the distance x between the tipping point 310 and the center of gravity COG of the total load1 The evaluation unit 117 calculates the total load and the center of gravity COG of the total load based on the patient weight entered by the operator into the telecontrol device 150 and the masses and centers of gravity of the detected accessories 151 and other components of the operating table 10 and, if necessary, the center of gravity or lying position of the patient. Fig. 6A and Figure 6B In FIG. 1 , the force vector F as the total load and the distance x between the force vector F and the tipping point 310 are marked. 1 For the residual tipping moment M r Applicable to M r =F*x 1 . For the residual tipping moment M r A positive value of means that the operating table 10 is stable about the tipping point 310 (see Fig. 6A ). As the spacing x decreases 1 , residual tipping moment M r The residual tipping moment M r When θ is negative, this means that the center of gravity COG and the force vector F are not directly above the surface bounded by the tipping point 310 about which the operating table 10 tips (see Figure 6B ). Residual tipping moment M r The larger the value of , the more stable the operating table 10 is. A residual tipping moment threshold value of, for example, 225 Nm is preset. This means that the residual tipping moment should not be less than 225 Nm. When the residual tipping moment threshold value is below, the position of the operating table 10 should not be approached. The evaluation unit 117 determines the limitation so that the position of the operating table 10 with a risk of tipping is not in the permitted area for operating the operating table 10.

[0155] Furthermore, the evaluation unit 117 can determine the corresponding residual tilting moments for all possible tilting points and compare the residual tilting moments with a residual tilting moment threshold value in each case. If only one of the tilting moments for a position of the operating table 10 is below the residual tilting moment threshold value, the evaluation unit 117 can determine that there is an increased risk of tilting in this position of the operating table 10 and the operating table 10 must not occupy this position during operation.

[0156] Another design for determining the tipping risk is based on the stability requirements of standard 60601-1. Standard 60601-1 stipulates that the operating table 10 must remain stable in all cases of intended use when tilted at 5 degrees and must only remain stable in a defined transport position when tilted at 10 degrees. This requirement can be converted into a virtual 5-degree line 320 at each tipping point and a 10-degree line 322 at each tipping point with pulleys 312, as shown in Figure 75 and 10 degrees may be referred to as stable angles. Thus, in some designs, there is a first stable angle when the operating table 10 is directly standing on the ground, and a second, larger stable angle when the operating table 10 is on rollers or wheels in the transport position.

[0157] The stabilization angle (e.g., 5 or 10 degrees) is determined with the aid of a predefined normal vector 324. The normal vector 324 can be defined, for example, by the base of the footrest 14 or by the patient support device 18 in the normal position, that is, in a non-extended position. The normal vector 324 is oriented perpendicularly to the base of the footrest 14 or perpendicularly to the patient support device 18 in the normal position. Instead of a stabilization angle of 5 or 10 degrees with the normal vector 324, other suitable stabilization angles can also be selected for the virtual lines 320, 322.

[0158] If the center of gravity COG of the total load is violated during the simulation of the position of the operating table 10, that is, it passes through one of the virtual 5-degree lines 320, the evaluation unit 117 determines that the operating table 10 may not occupy the position during operation. If one of the virtual 10-degree lines 322 is exceeded by the center of gravity COG, the evaluation unit 117 can block the motorized transport function of the operating table 10 in the position.

[0159] The three-dimensional space is defined by a virtual 5-degree line 320 or a virtual 10-degree line 322, respectively. Typically, when moving upward starting from the base of the operating table 10, so that the center of gravity COG is more strongly limited laterally in the case of a higher center of gravity COG than in the case of a lower center of gravity COG closer to the ground, the "walls" of the three-dimensional space tilt inward. The inwardly directed tilt of the "walls" of the three-dimensional space is determined by the stabilization angle. In one design, the evaluation unit 117 can determine the risk of tipping when the center of gravity COG of the total load leaves one of the defined spaces.

[0160] Accessories are usually used for a maximum patient weight in particular. The evaluation unit 117 checks within the simulation whether the predicted weight does not exceed a weight limit for the accessories. If a weight limit of the operating table 10 or the accessories is exceeded in the simulation, the evaluation unit 117 can include the corresponding position of the operating table 10 in the limit.

[0161] exist Figure 8 The operating table 10 shown in FIG. 1 has a head section 402, a leg section 404 and a plurality of extension sections 406 as accessories connected to a main support surface section 408 in the configuration shown. For each of the accessories, Figure 8The maximum load capacity is indicated in FIG. The head section 402 has a maximum load capacity of 250 kg, the leg section 404 has a maximum load capacity of 135 kg, each of the extension sections 406 has a maximum load capacity of 454 kg, and the entire operating table 10 has a maximum load capacity of 545 kg. The evaluation unit 117 checks whether one of the components is overloaded.

[0162] An accessory can also be overloaded when the configuration in which the accessories are connected to each other is not suitable for the load acting. Fig. 9 As shown in FIG. 4 , three extension sections 406 are cascaded one after the other. Although each of the extension sections 406 is individually suitable for a load of 454 kg, the combination 410 consisting of three extension sections 406 is only suitable for 155 kg. Therefore, in some designs, the permissible weight for the table configuration is determined taking into account a plurality of extension sections 406 connected to the operating table, wherein adding additional extension sections 406 overall reduces the permissible weight for the table configuration compared to a configuration with fewer extension sections 406.

[0163] Evaluation unit 117 checks in which positions of operating table 10 the predicted payload exceeds the permissible weight for configuration 410 by simulating the positions of operating table 10. If the permissible weight is exceeded in one or more of the positions, evaluation unit 117 can add the corresponding position of operating table 10 to the restrictions.

[0164] It is also conceivable that an overload situation may be caused by a specific support of the patient. Fig. 10A 4 shows a situation in which the patient is located on the head section 402 and the center of gravity of the entire patient is above the head section 402. Although the attachment 402 is suitable for use with a patient weighing 380 kg, the attachment 402 is only provided as a head support, that is, it is not permitted to sit on it. In order for the patient not to occupy such a position, it can be indicated to the operator on the display of the remote control device that the patient is not permitted to occupy a specific position on the patient support device 18.

[0165] It is also possible for the operator to input a specific patient position, which the patient assumes during the operation on the patient support device 18 , into the telecontrol device. The evaluation unit 117 takes the patient position into account when determining the payload and / or the center of gravity of the payload.

[0166] Furthermore, the evaluation unit 117 can also determine the risk of overload for specific sections or regions of the patient support device 18. Fig. 10AIn the example, the patient support device 18 is divided into different areas, for which a maximum load capacity of 155 kg, 250 kg or 550 kg applies. The evaluation unit 117 checks in which area the predicted center of gravity of the payload is located and compares the payload with an overload threshold value predefined for the area, that is, the maximum load capacity. If the payload exceeds the maximum load capacity predefined for the area, the evaluation unit 117 can bring the corresponding position of the operating table 10 into the limit.

[0167] Fig. 10B Shown with Fig. 10A Compared to the alternative design. The front part of the patient support device 18 including the head section 402 is Fig. 10B In the embodiment shown in FIG. 1 , instead of being divided into different regions with respectively constant overload thresholds, a straight line 420 extending along the front part of the patient support device 18 is provided. The straight line 420 provides a corresponding overload threshold for each region of the front part of the patient support device 18. The overload threshold becomes smaller toward the head end of the patient support device 18. The straight line 420 passes through the F / M 阈值 Definition, where F is the force at the center of gravity COG of the payload and M 阈值 is a constant.

[0168] The evaluation unit 117 checks at which part of the patient support device 18 the center of gravity of the payload is located and compares the payload with an overload threshold value predefined for the determined part. If the payload exceeds the maximum load capacity predefined for the area, the evaluation unit 117 can modify the limitation displayed to the operator so that the corresponding position of the operating table 10 is not accessible.

[0169] Another overload situation occurs when the drive of the operating table 10 is overloaded and the operating table 10 cannot return to its initial position. Fig.11 An extreme longitudinal displacement and Trendelenburg position in combination with a heavy patient is shown. This may be a position from which the operating table 10 cannot be returned to its initial position because the drive for the longitudinal displacement and the Trendelenburg drive are overloaded. In particular, the Trendelenburg drive cannot exert the force F 测量 Furthermore, the drive for the longitudinal movement cannot generate a longitudinal force F 纵向 .

[0170] The evaluation unit 117 can determine the load of each drive device based on the measured load and / or the center of gravity of the measured load. For each drive device, there is a load limit that should not be exceeded. When the limit is exceeded, it is displayed to the operator on the remote control device 150 that the operating table 10 is not allowed to occupy the corresponding position.

[0171] Exemplary embodiments and variations consistent with the present disclosure are described in the following list of points and options:

[0172] Point 1: A system (100) for determining and displaying limitations when operating an operating table (10), wherein the system (100) comprises:

[0173] A patient support device (18), in particular a surgical patient support device (18), for fastening to an operating table column (16) of an operating table (10),

[0174] a display unit (116) for displaying information about limitations in the operation of the operating table (10),

[0175] an input unit (114) for inputting information about the patient's weight and / or an interface (115) for receiving electronic patient weight information from outside the system (100), and

[0176] An evaluation unit (117) is designed to determine limitations when operating an operating table (10) based on at least the weight of a patient and to display the limitations on a display unit (116) before the patient is placed on the patient support device (18).

[0177] Point 2: The system (100) according to point 1, wherein the evaluation unit (117) also determines limitations when operating the operating table (10) based on the identification and / or configuration of the patient support device (18).

[0178] Point 3: The system (100) according to point 1 or 2 further comprises a detection unit (118) for detecting accessories mounted on the operating table (10) and in particular the patient support device (18).

[0179] Point 4: A system (100) according to one of the above points, wherein the evaluation unit (117) also determines limitations when operating the operating table (10) based on accessories (151) installed on the operating table (10) and in particular the patient support device (18).

[0180] Point 5: A system (100) according to one of the above points, wherein the input unit (114) and / or the interface (115) are designed so that a planned position to be taken up by the patient on the patient support device (18) and / or a planned center of gravity of the patient on the patient support device (18) can be input into the input unit (114) and / or received from the interface (115).

[0181] Point 6: A system (100) according to one of the above points, wherein the evaluation unit (117) also determines limitations when operating the operating table (10) based on a planned position to be occupied by the patient on the patient support device (18) and / or a planned center of gravity of the patient on the patient support device (18).

[0182] Point 7: A system (100) according to one of the above points, wherein the display unit (116) is arranged in the remote operation device (150) or in a screen physically separated from the patient support device (18), and / or wherein the input unit (114) is arranged in the remote operation device (150).

[0183] Point 8: A system (100) according to one of the above points, wherein the limitation when operating the operating table (10) relates to the movement of the patient support device (18), in particular the movement of the entire patient support device (18) and / or the individual movement of at least one section of the patient support device (18), and / or the movement of the operating table column (16).

[0184] Point 9: A system (100) according to one of points 1 to 7, wherein the limitation when operating the operating table (10) relates to the individual movement of at least one section of the patient support device (18) and / or the movement of the operating table column (16).

[0185] Point 10: A system (100) according to one of the above points, wherein a limitation in the operation of the operating table (10) is indicated at least by an area in which movement of the operating table (10), in particular the patient support device (18) and / or at least a section of the patient support device (18) is permitted.

[0186] Point 11: A system (100) according to one of the above points, wherein the restrictions when operating the operating table (10) include one or more of the following restrictions: restrictions when selecting an axis, about which the patient support device (18) and / or at least a section of the patient support device (18) can move; restrictions on the area, within which the patient support device (18) and / or at least a section of the patient support device (18) can move about the axis; restrictions on the speed, with which the patient support device (18) and / or at least a section of the patient support device (18) can move about the axis; restrictions when tilting the patient support device (18); restrictions when tilting the patient support device (18); restrictions when moving the patient support device (18) longitudinally; restrictions when moving the patient support device (18) laterally; restrictions when adjusting the height of the patient support device (18); restrictions when removing the rollers of the operating table (10) and / or restrictions when motorizing the transport of the operating table (10).

[0187] Point 12: A system (100) according to one of the above points, wherein the evaluation unit (117) determines limitations when operating the operating table (10) so as to prevent tipping of the operating table (10) and / or overloading of the operating table (10) and / or at least one component of the operating table (10).

[0188] Point 13: The system (100) according to point 12, wherein the overload of the operating table (10) and / or at least one component of the operating table (10) comprises at least one of the following overloads:

[0189] Overloading of accessories attached to the operating table (10) and in particular the patient support device (18) and / or structural components of the operating table (10), wherein the overloading can lead to bending or breaking of the structural components,

[0190] Overloading of a motorized joint of an operating table (10), which joint is not movable or is movable only to a limited extent due to the overloading.

[0191] Point 14: A system (100) according to one of the above points, wherein an evaluation unit (117) determines, for a plurality of positions that the operating table (10) can occupy during a preset movement, whether restrictions in the corresponding positions are required, in particular whether there is a risk of tipping over of the operating table (10) and / or a risk of overloading of the operating table (10) and / or at least one component of the operating table (10).

[0192] Point 15: A system (100) according to one of the above points, wherein an evaluation unit (117) determines a residual tipping moment about a preset tipping point for a plurality of positions that the operating table (10) can occupy during a preset movement, and when the residual tipping moment in one of the positions is below a preset residual tipping moment threshold, the evaluation unit (117) determines a tipping risk for the position, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the tipping risk for one or more of the plurality of positions of the operating table (10).

[0193] Point 16: A system (100) according to one of the above points, wherein an evaluation unit (117) determines the position of the load center of gravity of the operating table (10) with respect to at least one preset virtual line for a plurality of positions that the operating table (10) can occupy during a preset movement, and when the load center of gravity of the operating table (10) passes through at least one virtual line in one of the positions, the evaluation unit (117) determines the risk of tipping for the position, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the risk of tipping for one or more of the plurality of positions of the operating table (10).

[0194] Point 17: A system (100) according to one of the above points, wherein the evaluation unit (117) determines, based on the weight of the patient and / or the center of gravity of the patient, whether there is a risk of overloading the operating table (10) and / or at least one component of the operating table (10).

[0195] Point 18: A system (100) according to one of the above points, wherein the evaluation unit (117) compares the load acting on the operating table (10) and / or the patient support device (18) with at least one preset overload threshold value and determines that, when the load exceeds at least one overload threshold value, there is a risk of overloading the operating table (10) and / or at least one component of the operating table (10), wherein at least one overload threshold value is specifically used for the operating table (10) and / or at least one component.

[0196] Point 19: The system (100) according to one of the above points, wherein at least a portion of the patient support device (18) is virtually divided into a plurality of areas and an overload threshold is preset for each area, and

[0197] The evaluation unit (117) checks in which region the center of gravity acting on the operating table (10) and / or the patient support device (18) is located and determines an overload risk when the load exceeds an overload threshold value preset for the region, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to the determination of the overload risk.

[0198] Point 20: The system (100) according to one of the above points also includes at least one drive device for moving the operating table (10), wherein the evaluation unit (117) determines the load acting on the at least one drive device based on the patient's weight and / or the patient's center of gravity, and determines the overload risk when the load exceeds at least one preset overload threshold value specifically for the at least one drive device, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the overload risk.

[0199] Point 21: The system (100) according to one of the above points, wherein the patient weight information is input into the input unit (114) or received from the interface (115) before the patient is placed on the patient support device (18), and

[0200] In this case, before the patient is placed on the patient support device (18), an evaluation unit (117) simulates the movement of the operating table (10) with the patient supported thereon.

[0201] Point 22: A system (100) according to one of the above points, wherein the evaluation unit (117) is designed to determine limitations when operating the operating table (10) based on at least the weight of the patient, in that the evaluation unit (117) simulates the movement of the operating table (10) together with the patient supported thereon.

[0202] Point 23: A method for determining and displaying limitations when operating an operating table (10), wherein

[0203] inputting information about the patient's weight into an input unit (114) and / or receiving electronic patient weight information at an interface (115);

[0204] determining limitations in operating the operating table (10) based on at least the patient weight; and

[0205] Before a patient is placed on a patient support device (18), in particular a surgical patient support device (18), the limits are displayed on a display unit (116).

Claims

1. A system (100) for determining and displaying limitations when operating an operating table (10), wherein the system (100) include: A patient support device (18), in particular a surgical patient support device (18), for fastening to an operating table column (16) of an operating table (10), a display unit (116) for displaying information about limitations in the operation of the operating table (10), an input unit (114) for inputting information about the patient's weight and / or an interface (115) for receiving electronic patient weight information from outside the system (100), and An evaluation unit (117) is designed to determine limitations when operating the operating table (10) based on at least the patient weight and to display the limitations on the display unit (116) before the patient is placed on the patient support device (18).

2. The system (100) according to claim 1, wherein the evaluation unit (117) further determines limitations when operating the operating table (10) based on the identification and / or configuration of the patient support device (18).

3. The system (100) according to claim 1 or 2, further comprising a detection unit (118) for detecting accessories mounted on the operating table (10) and in particular on the patient support device (18).

4. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) also determines limitations when operating the operating table (10) based on accessories (151) installed on the operating table (10) and in particular the patient support device (18).

5. A system (100) according to any one of the preceding claims, wherein the input unit (114) and / or the interface (115) are designed so that a planned position to be assumed by the patient on the patient support device (18) and / or a planned center of gravity of the patient on the patient support device (18) can be input into the input unit (114) and / or received by the interface (115).

6. A system (100) according to any of the above claims, wherein the evaluation unit (117) also determines limitations when operating the operating table (10) based on a planned position that the patient should occupy on the patient support device (18) and / or a planned center of gravity of the patient on the patient support device (18).

7. A system (100) according to any of the above claims, wherein the display unit (116) is arranged in a remote operating device (150) or in a screen physically separated from the patient support device (18), and / or wherein the input unit (114) is arranged in the remote operating device (150).

8. A system (100) according to any of the preceding claims, wherein the limitations when operating the operating table (10) relate to the movement of the patient support device (18), in particular the movement of the entire patient support device (18) and / or the individual movement of at least one section of the patient support device (18), and / or the movement of the operating table column (16).

9. The system (100) according to any one of claims 1 to 7, wherein the limitation when operating the operating table (10) involves the individual movement of at least one section of the patient support device (18) and / or the movement of the operating table column (16).

10. A system (100) according to any of the preceding claims, wherein a limitation when operating the operating table (10) is indicated at least by an area in which movement of the operating table (10), in particular the patient support device (18) and / or at least a section of the patient support device (18) is permitted.

11. The system (100) according to any of the preceding claims, wherein the restrictions when operating the operating table (10) include one or more of the following restrictions: restrictions when selecting an axis, about which the patient support device (18) and / or at least a section of the patient support device (18) can move; restrictions on the area, within which the patient support device (18) and / or at least a section of the patient support device (18) can move about the axis; restrictions on the speed, with which the patient support device (18) and / or at least a section of the patient support device (18) can move about the axis; restrictions when tilting the patient support device (18); restrictions when tilting the patient support device (18); restrictions when moving the patient support device (18) longitudinally; restrictions when moving the patient support device (18) laterally; restrictions when adjusting the height of the patient support device (18); restrictions when removing rollers of the operating table (10) and / or restrictions when motorizing the transport of the operating table (10).

12. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) determines limitations when operating the operating table (10) so as to prevent tipping of the operating table (10) and / or overloading of the operating table (10) and / or at least one component of the operating table (10).

13. The system (100) according to claim 12, wherein the overload of the operating table (10) and / or at least one component of the operating table (10) comprises at least one of the following overloads: Overloading of accessories mounted on the operating table (10) and in particular the patient support device (18) and / or structural components of the operating table (10), wherein the overloading can lead to bending or breaking of the structural components, and Overloading of the motorized articulation of the operating table (10), which articulation cannot be moved or can only be moved within a limited range due to the overloading.

14. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) determines, for a plurality of positions that the operating table (10) can occupy during a preset movement, whether restrictions are required in the corresponding positions, in particular whether there is a risk of tipping over of the operating table (10) and / or a risk of overloading of the operating table (10) and / or at least one component of the operating table (10).

15. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) determines a residual tipping moment about a preset tipping point for a plurality of positions that the operating table (10) can occupy during a preset movement, and for one of the positions, when the residual tipping moment in the position is below a preset residual tipping moment threshold, the evaluation unit (117) determines a tipping risk, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the tipping risk for one or more of the plurality of positions of the operating table (10).

16. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) determines the position of the load center of gravity of the operating table (10) with respect to at least one preset virtual line for a plurality of positions that the operating table (10) can occupy during a preset movement, and for one of the positions, when the load center of gravity of the operating table (10) passes through the at least one virtual line in the position, the evaluation unit (117) determines a risk of tipping, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the risk of tipping for one or more of the plurality of positions of the operating table (10).

17. A system (100) according to any of the preceding claims, wherein the evaluation unit (117) determines, based on the weight of the patient and / or the center of gravity of the patient, whether there is a risk of overloading the operating table (10) and / or at least one component of the operating table (10).

18. A system (100) according to any of the above claims, wherein the evaluation unit (117) compares the load acting on the operating table (10) and / or the patient support device (18) with at least one preset overload threshold, and determines that there is a risk of overloading the operating table (10) and / or at least one component of the operating table (10) when the load exceeds at least one overload threshold, wherein the at least one overload threshold is specifically used for the operating table (10) and / or at least one component.

19. The system (100) according to any one of the preceding claims, wherein at least a portion of the patient support device (18) is virtually divided into a plurality of zones and an overload threshold is preset for each zone, and The evaluation unit (117) checks in which region the center of gravity of a load acting on the operating table (10) and / or the patient support device (18) is located and determines an overload risk when the load exceeds an overload threshold preset for the region, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the overload risk.

20. The system (100) according to any of the above claims further comprises at least one drive device for moving the operating table (10), in particular at least a part of the patient support device (18), relative to other parts (100) of the system, and in particular for moving at least a part of the patient support device (18) relative to another part of the patient support device (18), wherein the evaluation unit (117) determines a load acting on the at least one drive device based on the weight of the patient and / or the center of gravity of the patient, and determines an overload risk when the load exceeds at least one preset overload threshold value specifically for the at least one drive device, wherein in particular the display unit (116) displays information about at least one limitation when operating the operating table (10) in response to determining the overload risk.

21. The system (100) according to any of the preceding claims, wherein the patient weight information is input into the input unit (114) or received from the interface (115) before the patient is placed on the patient support device (18), and Therein, before the patient is placed on the patient support device (18), the evaluation unit (117) simulates the movement of the operating table (10) together with the patient supported thereon.

22. A system (100) according to any of the above claims, wherein the evaluation unit (117) is designed to determine limitations when operating the operating table (10) based on at least the weight of the patient, in that the evaluation unit (117) simulates the movement of the operating table (10) together with the patient supported thereon.

23. A method for determining and displaying limitations when operating an operating table (10), wherein inputting information about the patient's weight into an input unit (114) and / or receiving electronic patient weight information at an interface (115); determining limitations in operating the operating table (10) based on at least the patient weight; as well as Before the patient is placed on the patient support device (18), in particular a surgical patient support device (18), the limitation is displayed on a display unit (116).

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