JP2016080752A - Medical activity training appropriateness evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical activity training appropriateness evaluation device capable of quantitatively evaluating whether or not the consciousness of a trainee in a medical training is concentrated on an appropriate object at an appropriate timing or whether or not his or her consciousness is lost due to habituation or the like during training.SOLUTION: A medical activity training appropriateness evaluation device includes: a gaze object estimation mechanism 2 for estimating the position of an estimated gaze object gazed by a trainee PR in a medical activity training by a medical simulator S simulating a part or the whole of a human body; a reference gaze object position storage part 3 for storing the positions of a plurality of reference gaze objects set as objects to be gazed by the trainee PR during the medical activity training; and an appropriateness evaluation part 4 for evaluating the appropriateness of the gaze object of the trainee PR on the basis of a degree of matching between the position of the estimated gaze object and the positions of the plurality of reference gaze objects.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for evaluating the appropriateness of medical practice training using a medical simulator in medical education.

  When a medical worker performs some medical action on a patient, it is necessary to appropriately select a target site that he / she is conscious of according to the type of diagnosis or procedure and the patient's condition. For example, a medical staff needs to concentrate consciousness on the patient's facial expression when conducting an inquiry, and needs to concentrate consciousness on a target site such as the patient's arm when performing an invasive procedure such as injection.

  For example, Patent Document 1 discloses a tracheal intubation training apparatus that is a type of medical simulator that can objectively evaluate a tracheal intubation technique itself performed by a doctor, a paramedic, or the like. By using such a medical simulator, medical practice training for concentrating consciousness on a target site of a patient on whom medical practice is performed can be performed.

  Furthermore, medical practice training using medical simulators in such medical education includes various tasks such as labor saving, self-learning, acquisition of techniques that cannot be repeated repeatedly in the living body, and the ability to repeat uniform and fair evaluations. Due to its merit, it is becoming widely used in medical education such as OSCE (Objective Structured Clinical Examination).

  By the way, when comparing medical training using a medical simulator and clinical practice using an actual living body, medical practice training using a medical simulator also has drawbacks such as lack of reality and lack of response as a living body. doing. As a specific example in which these drawbacks appear, there is a point that the operation tends to be complicated when the trainee gets used to the medical simulator. This can be said to be a situation where the consciousness of the practitioner is not concentrated on the subject when it should be concentrated.

  In order to solve the problem that the practitioner cannot concentrate on the target site due to such lack of reality, in Patent Document 2, for example, an instrument holder provided with a medical instrument and a pseudo patient imitating a patient receiving medical care In a medical training device comprising a body and a clinical table on which the simulated patient body is placed, a detection signal relating to the clinical table and a medical instrument is captured, and the facial expression and operation of the simulated patient body are changed based on the detection signal What is comprised so that it may be made to disclose is disclosed. Furthermore, this medical training device is configured to image changes in facial expression and motion of the pseudo-patient body, and can be viewed by the trainee after the training. That is, in this medical training apparatus, the practitioner can be made to perceive the change of the pseudo patient body according to the practitioner's action during the training or after the training.

  On the other hand, medical staff are also required to turn their consciousness to the surrounding situation at an appropriate cycle while avoiding excessive concentration only on a target site of a patient. Such selective switching of consciousness is regarded as one of the important abilities of medical staff, and it is required to evaluate this ability in a pseudo clinical scene using a medical simulator or the like.

  However, since the medical training using the medical simulator as in Patent Document 1 is intended only to concentrate the consciousness on a certain part of the patient, the consciousness of the practitioner who performs the medical training with the medical simulator There are currently no techniques or methods for quantitatively evaluating selective switching ability.

  Furthermore, the purpose of medical practice training using a medical simulator in medical education is not just to acquire a technique, but to nurture medical personnel who face the patient seriously.

  However, in the medical training device of Patent Document 2, changes in facial expression and motion of the pseudo patient body are captured as a moving image, but since the trainee himself is not captured, what kind of action is being performed It is difficult to quantitatively evaluate whether the concentration of the practitioner is interrupted or whether it is not concentrated at the point where it should be concentrated, or to confirm by the practitioner himself.

Japanese Patent No. 4993971 WO2008 / 023464 Publication

  The present invention is designed to solve the above-described problems all at once, and whether a practitioner who is performing medical training can concentrate on an appropriate subject at an appropriate timing, It is an object of the present invention to provide a medical practice training appropriateness evaluation device capable of quantitatively evaluating whether or not concentration is interrupted due to familiarity.

  In other words, the medical practice training appropriateness evaluation device of the present invention determines the position of an estimated gaze target, which is a target that a practitioner conducting medical practice training with a medical simulator simulating part or all of the human body. Gaze target estimation mechanism for estimation, a reference gaze target position storage unit that stores a plurality of reference gaze target positions set as targets to be watched by an apprentice during the medical practice training, and a position of the estimated gaze target And an appropriateness evaluation unit that evaluates the appropriateness of the gaze target of the trainee based on the degree of coincidence with the positions of the plurality of reference gaze targets.

  In such a case, the estimated gaze target estimates the gaze target of the apprentice, and the appropriateness evaluation unit includes the position of the estimated gaze target and a plurality of the criteria that are the targets that the practitioner should gaze at Since it is configured to evaluate the appropriateness of the practitioner's gaze target based on the degree of coincidence with the position of the gaze target, the practitioner who is practicing medical practice using the medical simulator should pay attention to the reference gaze It is possible to quantitatively evaluate whether or not the subject can be watched appropriately.

  More specifically, when the degree of coincidence between the position of the estimated gaze target and the positions of the plurality of reference gaze targets is low, the practitioner is appropriately focused on the target to be watched during medical practice training. In such a case, the degree of appropriateness may be evaluated as low. On the contrary, when the degree of coincidence is high, it is considered that the apprentice is able to turn the consciousness toward a plurality of objects to be watched, so the appropriateness evaluation unit evaluates that the appropriateness is high do it.

  In this way, it is possible to evaluate subjects that have been difficult to evaluate quantitatively in the past, such as how to divide the consciousness of the trainee and the degree of concentration, etc., and give the trainee an objective assessment and use the medical simulator. It was possible to enhance the training effect of medical practice training.

  For example, when the patient is not conscious of surgery or the like, it is important not to concentrate only on the patient but to watch the vital sign display device at a certain frequency. Thus, in order to be able to more accurately evaluate the ability to appropriately distribute consciousness between the patient and each of the surroundings, the reference gaze object is a patient gaze object set on the medical simulator, A surrounding gaze target set as another target other than the medical simulator, and the appropriateness evaluation unit includes a plurality of estimated gaze target positions estimated by the gaze target estimation mechanism, the patient gaze target, and What is necessary is just to be comprised so that the said appropriateness may be evaluated based on a coincidence with each position of the said surrounding gaze target.

  When some kind of treatment is performed, the medical staff pays attention to the patient immediately before performing the treatment, and attention is given to the affected area prior to the start of the treatment. In order to be able to quantitatively evaluate such a viewpoint, the medical practice training is performed by a practitioner in order, and the reference gaze target position storage unit corresponds to each act. And storing the reference gaze target set respectively, and the appropriateness evaluation unit determines the appropriateness based on the degree of coincidence between the position of the estimated gaze target and the position of the reference gaze target in each action. What is necessary is just to be comprised so that it may evaluate.

  For example, when conducting an inquiry, it is preferable that the apprentice is watching the patient during the period when the patient is asked and when the patient responds. Therefore, in order to be able to evaluate whether an apprentice is gazing at a target with an appropriate length, it is the length of time that the apprentice is gazing at the estimated gaze target. A gaze time estimation unit that estimates an estimated gaze time; and a reference gaze time storage unit that stores a reference gaze time that is a length of time that an apprentice should gaze at the reference gaze target. The evaluation unit may be configured to evaluate the appropriateness based on the degree of coincidence between the estimated gaze time and the reference gaze time.

  Although it is important to distribute consciousness not only to the patient but also to the surroundings, if the distribution is not appropriate, significant changes in the patient can be overlooked. From this point of view, the apprentice is looking at the patient gaze target in order to take into account the appropriateness of the time distribution of the subject that the apprentice is pouring and to achieve an evaluation closer to the field. A gaze ratio estimation unit that estimates an estimated gaze ratio that is a ratio of an estimated site gaze time that is a length of time and an estimated ambient gaze time that is a length of time that an apprentice is watching the surrounding gaze target; The ratio of the reference part gaze time that is the length of time that the apprentice should watch the patient gaze target and the reference peripheral gaze time that is the length of time that the apprentice should watch the surrounding gaze target A reference gaze ratio storage unit that stores a certain reference gaze ratio, and the appropriateness evaluation unit is configured to evaluate the appropriateness based on a degree of coincidence between the estimated gaze ratio and the reference gaze ratio. It only has to be.

  For example, in order to be able to estimate an estimated gaze target without having a practitioner wear anything using a device such as a camera provided in advance in a facility performing medical practice training, the gaze target estimation An image captured so that the mechanism includes a gaze target position vector storage unit that stores a gaze target position vector that is a position vector from a predetermined reference position to each target that the practitioner can gaze at, and a practitioner Based on the data, a trainee position vector that is a position vector from the reference position to the trainee and a line-of-sight calculation unit that calculates a line-of-sight unit vector indicating a direction in which the trainee is gazing, and the gaze target position vector, What is necessary is just to be provided with the viewpoint estimation part which estimates the said estimation gaze target of a training person based on the said training person position vector and the said gaze unit vector.

  As a specific embodiment for estimating the estimated gaze target of the trainee, the gaze target estimation mechanism is provided in a place other than the reference position, and images the trainee and generates image data. And a practitioner position detector that is provided at the reference position, images the practitioner to generate image data, and detects a direction and a separation distance from the reference position to the practitioner, and The line-of-sight calculation unit is based on the image data of the first camera or the practitioner position detector, and the distance from the reference position detected by the practitioner position detector to the practitioner. There are those configured to calculate the position vector and the line-of-sight unit vector.

  As a specific embodiment capable of estimating the estimated gaze target of the practitioner, the gaze target estimation mechanism captures the practitioner and generates image data, and the first camera And a second camera that captures an instructor and generates image data, and the line-of-sight calculation unit includes each image data of the first camera and the second camera. And the apprentice position vector and the line-of-sight unit vector are calculated based on the distance between the first camera and the second camera. If it is such, it will be possible to estimate the appropriate gaze target of the trainee and evaluate the appropriateness of the watch target of the trainer simply by preparing two cameras.

  In order to set the reference gaze target at a position where the expert is viewing and to be able to evaluate how close the practitioner is to the expert, an evaluation mode in which the appropriateness is evaluated by the appropriateness evaluation unit and , Further comprising a mode switching unit for switching between a storage mode for storing the position of the reference gaze target in the reference gaze target position storage unit, and in the storage unit mode, the reference gaze target position storage unit is configured to estimate the gaze target The position of the estimated gaze target estimated by the mechanism may be configured to be stored as the position of the reference gaze target.

  According to the present invention, it is possible to estimate a practitioner's gaze target and quantitatively evaluate whether or not the gaze target is directed to a plurality of reference gaze targets, so medical practice training using a medical simulator Can be accurately estimated.

1 is a perspective view showing an overall configuration of a medical practice training appropriateness evaluation device according to an embodiment of the present invention. It is a block diagram which shows the function structure of the medical practice training appropriateness evaluation apparatus in the embodiment. It is a schematic diagram shown about the detection principle of the estimation gaze target in the embodiment. It is a flowchart which shows the flow of the medical practice training appropriateness evaluation process in the embodiment. It is a flowchart which shows the flow of the appropriateness determination process by the spatial coincidence in the medical practice training appropriateness evaluation process in the embodiment. It is a flowchart which shows the flow of the appropriateness determination process by the time coincidence in the medical practice training appropriateness evaluation process in the embodiment. It is a flowchart which shows the flow of the appropriateness determination process by the coincidence degree of the time allocation of the gaze object in the medical practice training appropriateness evaluation process in the embodiment.

  Hereinafter, a medical practice training appropriateness evaluation apparatus 100 according to an embodiment of the present invention will be described with reference to the drawings.

  The medical practice training appropriateness evaluation device 100 according to the present embodiment pays attention to a practitioner PR (practitioner or educated person) during medical practice training using a medical simulator S that imitates part or all of a human body. The target is estimated and quantitatively evaluated whether or not the apprentice PR can appropriately distribute the consciousness to the medical simulator S imitating the patient and its surroundings. More specifically, the medical practice training appropriateness evaluation device 100 determines whether or not the target of the trainee PR is directed to an appropriate target at an appropriate timing, the timing at which the user is watching, the length of time, and the time. It is configured to evaluate whether the allocation is appropriate and to evaluate the appropriateness of medical practice training. Here, the action performed by the trainee PR during the medical practice training is imaged by interrogation, palpation, visual inspection, auscultation, percussion, medical image diagnosis (ultrasonic echo, X-ray, MRI, CT, PET, other methods) Diagnosis based on images), various procedures, and the like.

  FIG. 1 shows a medical simulator utilization environment 1 in which medical practice training using the medical simulator S is performed. As shown in FIG. 1, a medical simulator utilization environment 1 includes a medical simulator S imitating a human body, a diagnostic bed 1c on which the medical simulator S is placed, an infusion device set 1d, a biological information monitor 1e, and various devices. A tablet terminal 1f and the like are provided as computers for performing control and various operations, and a plurality of devices that are in an actual medical field and can be a gaze target of the trainee PR are arranged. It should be noted that each device that requires communication is connected by a short-distance wireless connection, regardless of wireless LAN, wired LAN, or any other method. Moreover, in this embodiment, the 1st camera 1a which images the training person PR during medical practice training is provided on the ceiling, and the training person PR is imaged on the head of the medical simulator S and its distance The practitioner position detector 1b for measuring is incorporated.

  And the medical practice training appropriateness evaluation apparatus 100 of this embodiment is the calculation mechanism comprised using the calculation capability of the said 1st camera 1a, the said apprentice position detector 1b, and the said tablet terminal 1f, for example. It is composed of.

  That is, as shown in the functional block diagram of FIG. 2, the gaze target estimation mechanism 2 that includes the first camera 1a and the trainee position detector 1b and estimates the position of the gaze target of the trainee PR, and the calculation At least the appropriateness evaluation unit 4, the reference gaze target position storage unit 3, the gaze time estimation unit 5, the reference gaze time storage unit 6, the gaze rate estimation unit 7, the reference gaze rate storage unit 8, and the mode switching unit 9 depending on the calculation capability of the mechanism. It is comprised so that the function as may be demonstrated. Here, with respect to a part of the gaze target estimation mechanism 2 and other parts, a program stored in the memory of the tablet terminal 1f is executed, and its function is realized by cooperating with various devices.

  Each part will be described in detail.

  The gaze target estimation mechanism 2 estimates the position of the estimated gaze target that is the target that the practitioner PR performing medical practice training with the medical simulator S imitating a part or all of the human body. It is configured. In the present embodiment, as shown in the schematic diagram of FIG. 3, the line of sight of the trainer PR is detected as a virtual line of sight in a three-dimensional space based on the outputs of the first camera 1a and the trainee position detector 1b. The object existing on the virtual line of sight in the medical simulator utilization environment 1 in the direction is estimated.

  More specifically, the gaze target estimation mechanism 2 includes a gaze target position vector storage unit 22, the first camera 1a, the apprentice position detector 1b, and a gaze calculation unit 21 as shown in FIG. And the viewpoint estimation unit 23 and hardware and software.

  The gaze target position vector storage unit 22 stores gaze target position vectors, which are position vectors from a predetermined reference position to each target in the medical simulator usage environment 1 where the trainee PR can gaze. is there. In the present embodiment, as shown in FIG. 3, the reference position (origin) is set at the place where the apprentice position detector 1b provided in the medical simulator S is installed. Therefore, the gaze target position vector of the present embodiment is, for example, a vector connecting from the apprentice position detector 1b to each part such as an arm or a leg of the medical simulator S, or from the apprentice position detector 1b. It is a vector that connects each of the examination bed 1c, the infusion device set 1d, and the biological information monitor 1e. This gaze target position vector is set based on measurements performed in advance.

  The first camera 1a is provided at a place different from the trainee position detector 1b arranged at a predetermined reference position, and captures the trainee PR to generate image data. From this image data, a unit vector V1e indicating the direction from the first camera 1a to the trainee PR can be calculated.

  The apprentice position detector 1b is provided on the head of the medical simulator S, which is a predetermined reference position. The trainee position detector 1b images the trainee PR to generate image data, and based on the image data, The direction and the distance from the position where the person position detector 1b is provided to the trainee PR are measured. That is, the trainee position detector 1b can obtain a vector V2e that connects the head of the medical simulator S to the trainee PR.

  The line-of-sight calculation unit 21 detects a virtual line-of-sight straight line VL that is a straight line in a three-dimensional space that passes through the eye position of the trainee PR and extends in the line-of-sight direction of the trainee PR. It is configured to calculate based on the output of the device 1b. That is, the line-of-sight calculation unit 21 calculates the line-of-sight unit vector Vet indicating the direction in which the trainee PR is gazing based on the image data captured so as to include the trainee PR. For example, the direction of the trend of the trainee PR and the direction of the face in the image data are detected by image processing, and the line-of-sight unit vector Vet is calculated. The line-of-sight calculation unit 21 starts from a point indicated by an instructor position vector V2e that is a position vector from the reference position to the instructor PR measured by the instructor position detector 1b. A straight line extending in the direction of the visual line unit vector Vet is calculated as a virtual visual line VL.

  The viewpoint estimator 23 estimates the apprentice PR based on the gaze target position vector V (target), the trainee position vector V2e, and the virtual line of sight straight line VL calculated from the line-of-sight unit vector Vet. The gaze target is estimated.

  More specifically, as shown in FIG. 3, the viewpoint estimation unit 23 passes the point indicated by the trainee position vector V2e, and the gaze target position vector on a virtual line of sight straight line VL extending along the line-of-sight unit vector Vet. When the point indicated by V (target) is on or close, it is estimated that the estimated gaze target is directed to the target indicated by the corresponding gaze target position vector V (target). That is, when the gaze target position vector V (target) indicating the position of each target is an estimated gaze target that substantially intersects with the virtual gaze line VL extending along the gaze unit vector Vet, the viewpoint estimation unit 23 Will be estimated.

  The appropriateness evaluation unit 4 evaluates whether the subject being watched by the trainee PR is an appropriate target and whether the watch time is appropriate or whether the consciousness is sufficiently distributed. is there. More specifically, as shown in the flowchart of FIG. 4, when the gaze target estimation mechanism 2 estimates an estimated gaze target that is a gaze target of the trainee PR (step S1), the appropriateness evaluation unit 4 The degree of coincidence between the estimated gaze target estimated by the gaze target estimation mechanism 2 and the reference gaze target that is an ideal gaze target viewed by an expert is calculated (step S2), and appropriate based on the calculated degree of coincidence The degree is configured to be evaluated (step S3). Here, the degree of coincidence between the estimated gaze target and the reference gaze object includes spatial and temporal coincidence and coincidence regarding time distribution, and the appropriateness is comprehensive based on evaluation items of a plurality of coincidence degrees. It is supposed to be evaluated.

  Hereinafter, the evaluation of the degree of matching and the degree of appropriateness will be described together with related parts.

  The reference gaze target position storage unit 3 shown in FIG. 2 stores a plurality of reference gaze target positions (position vectors, coordinates) set as targets to be watched by the trainee PR during the medical practice training. is there. In the present embodiment, the reference gaze target is set based on the target viewed by the expert in the medical simulator utilization environment 1 when performing medical practice training using the medical simulator S.

  The reference gaze target is set along a time series, for example, corresponding to each of a plurality of actions performed in order by the trainee PR during the medical practice training. In addition, in order to be able to evaluate whether the consciousness distribution of the trainee PR is appropriately performed, the reference gaze target includes a patient gaze target set on the medical simulator S, and the medical simulator S There are two types of surrounding gaze targets set as other targets.

  For example, in the case where the medical practice training is a training related to confirmation of the presence or absence of tenderness at the time of an inquiry or palpation using the medical simulator S, the training PR can evaluate whether the patient PR is gazing at the facial expression of the patient. The reference gaze target (patient gaze target) is set to the head (facial expression) of the medical simulator S. In addition, when medical practice training is a training at the time of a round visit to an inpatient, it is possible to evaluate whether the practitioner PR can watch not only the patient but also surrounding objects such as around the bed and infusion. Therefore, the head of the medical simulator S is set as a patient gaze target, and is set around the bed and drip as the gaze target.

  In addition, the reference gaze target is set to the face, arm, leg, etc. of the medical simulator S in order to evaluate whether the apprentice PR can confirm the left-right difference of the patient during the assessment. In addition, when moving between a wheelchair and a bed, when changing postures to prevent pressure ulcers, or during training such as bathing, the destination and patient status can be confirmed before and after moving the patient. The reference gaze target may be set on the medical simulator S and the moving destination bed or the like at every time so that it can be evaluated. In addition, in order to evaluate whether the ability to distribute the consciousness of the practitioner PR is demonstrated in medical practice training at the time of surgery, etc., and the patient's state can be grasped in each of the patient's whole body and the biological information monitor 1e, The medical simulator S may be set as the patient gaze target, and the surrounding gaze target may be set in the biological information monitor 1e.

  Here, the appropriateness evaluation based on the spatial coincidence will be described with reference to the flowchart of FIG. 5 showing a more specific procedure for steps S2 and S3 in the flowchart of FIG. Interrogation, palpation, visual examination, auscultation, percussion, medical image diagnosis (diagnosis based on images picked up by ultrasonic echo, X-ray, MRI, CT, PET, and other methods), various procedures in the medical simulator operation unit 1f When (or scene) is selected, the appropriateness evaluation unit 4 reads the position of the reference gaze target (patient gaze target, surrounding gaze target) stored for each scene in the reference gaze target position storage unit 3. (Step S4), the degree of coincidence is determined based on the distance between the position of the estimated gaze target and the position of the reference gaze target (Step S5). Here, when the distance between the position of the estimated gaze target and the position of the reference gaze target is within a predetermined value, the appropriateness evaluation unit 4 performs evaluation so that the appropriateness becomes high (step S6). On the other hand, when the distance between the position of the estimated gaze target and the position of the reference gaze target is greater than a predetermined value, the appropriateness evaluation unit 4 evaluates the appropriateness to be low (step S7).

  Next, the configuration and operation related to the calculation of the temporal coincidence between the estimated gaze object and the reference gaze object and the evaluation of the appropriateness based on the temporal coincidence will be described.

  Based on the position of each estimated gaze target output from the viewpoint estimation unit 23, the gaze time estimation unit 5 is an estimated gaze that is the length of time that the apprentice PR is gazing at each estimated gaze target. Estimate time. In the present embodiment, among the estimated gaze targets estimated to be viewed by the trainee PR until the medical practice training is completed, the distance between the estimated gaze target position and the reference gaze target position is predetermined. For those within the range, the gaze time is counted, and the estimated gaze time is estimated for each reference gaze target.

  The reference gaze time storage unit 6 stores a reference gaze time that is the length of time that the trainee PR should gaze at each reference gaze target. This reference gaze time is also set to a value when an expert actually performs medical practice training using the medical simulator S.

  Then, the appropriateness evaluation unit 4 compares the estimated gaze time and the reference gaze time for each reference gaze object, and evaluates the appropriateness based on the degree of coincidence. For example, when the difference between the estimated gaze time and the reference gaze time is within a predetermined value, it is determined that they are completely matched, and the appropriateness is highly evaluated.

More specifically, as shown in the flowchart of FIG. 6, the appropriateness evaluation unit 4 reads out a reference gaze time, which is a time when the reference gaze target should be viewed, from the reference gaze time storage unit 6 (step S <b> 8). The temporal coincidence is determined based on the difference between the estimated gaze time and the reference gaze time (step S9). Here, if the difference between the estimated gaze time and the reference gaze time is within a predetermined value, the appropriateness evaluation unit 4 evaluates the appropriateness to be high (step S10). On the other hand, if the difference between the estimated gaze time and the reference gaze time is greater than a predetermined value, the appropriateness evaluation unit 4 evaluates the appropriateness to be low (step S11).

  Next, the configuration and operation related to the calculation of the degree of coincidence regarding the time distribution of the estimated gaze object and the reference gaze object and the evaluation of the appropriateness based on the temporal degree of coincidence will be described.

  The gaze ratio estimation unit 7 is based on the output of the gaze time estimation unit 5 and is an estimated part gaze time that is the length of time that an apprentice PR is looking at the patient gaze target, and the gaze target is a practitioner. The estimated gaze ratio, which is the ratio of the estimated ambient gaze time, which is the length of time that the PR is watching, is estimated.

  The reference gaze ratio storage unit 8 includes a reference part gaze time that is a length of time that the instructor PR should watch the patient gaze target, and a length of time that the instructor PR should see the surrounding gaze target. The reference gaze ratio that is the ratio to the reference ambient gaze time is stored.

  Here, the evaluation regarding the time distribution of the gaze time will be described with reference to the flowchart of FIG. The appropriateness evaluation unit 4 reads out a reference gaze rate indicating a time allocation for gazing at each reference gaze target from the reference gaze rate storage unit 7 (step S12), and allocates time based on the difference between the estimated gaze rate and the reference gaze rate. Is determined (step S13). Here, when the difference between the estimated gaze ratio and the reference gaze ratio is within a predetermined value, the appropriateness evaluation unit 4 evaluates the appropriateness to be high (step S14). On the other hand, if the difference between the estimated gaze ratio and the reference gaze ratio is greater than a predetermined value, the appropriateness evaluation unit 4 evaluates the appropriateness to be low (step S15).

  Finally, a configuration related to the setting of the reference gaze target will be described.

  The mode switching unit 9 shown in FIG. 2 includes an evaluation mode in which the appropriateness evaluation unit 4 evaluates the appropriateness, and a storage mode in which the reference gaze target position storage unit 3 stores the position of the reference gaze target. , To switch. The functional block diagram of FIG. 2 shows a state in which the evaluation mode is implemented. When the mode switching unit 9 switches to the storage mode, all the switches shown in the functional block diagram of FIG. The output of the viewpoint estimation unit 23 is input only to the reference gaze target position storage unit 3. In this storage mode, when the skilled person actually performs medical practice training in the medical simulator utilization environment 1, the target being watched by the skilled person is stored in the reference gaze target position storage unit 3 as the reference gaze target position. Remembered. Here, the reference gaze time and the reference gaze ratio are also memorized based on the gaze time and time distribution of the gaze object memorized by the skilled person. That is, in the storage mode, a reference that serves as an example for an expert is stored in each storage unit.

  With the medical practice training appropriateness evaluation device 100 configured as described above, the estimated gaze target of the apprentice PR estimated by the gaze target estimation mechanism 2 with respect to a plurality of reference gaze targets is spatial, temporal, The appropriateness of the medical practice training of the trainee PR can be quantitatively evaluated based on whether or not they match in terms of time allocation.

  Therefore, it is determined quantitatively from the appropriateness whether the consciousness is appropriately distributed to a plurality of reference gazing targets, whether the patient is not focused on the medical simulator S, and is carrying out moderate training. Will be able to. For this reason, even if the medical practice training uses the medical simulator S, it becomes difficult for the trainee PR to seriously enter the training so that the appropriateness is not evaluated low. Furthermore, since it is possible to quantitatively evaluate whether or not the trainee RP is gazing at multiple reference gazing targets, is it not concentrating too much on one target and is sufficient to allocate consciousness to the surroundings? Can also be evaluated. In other words, it is possible to give a quantitative evaluation as to whether or not the trainee PR, which has been difficult to evaluate in the past, can demonstrate the ability to selectively switch the consciousness required of medical professionals. You will be able to train.

  In addition, from the PR, it becomes easier to objectively grasp whether or not the subject being watched is appropriate compared to the skilled person, and to reflect it in the next medical practice training, and the medical simulator S was used. The effect of medical practice training can be further enhanced. In addition, the evaluator can objectively understand the ability of the PR of the trainee PR, so that the ability of the PR of the trainee PR can be accurately understood and can provide more appropriate advice. Become.

  Furthermore, in this embodiment, since the trainee PR does not wear anything, it is possible to evaluate the appropriateness of the conscious subject without interfering with medical practice training.

  Next, another embodiment of the present invention will be described.

  Although the gaze target estimation mechanism estimates the estimated gaze target of the practitioner based on the output from the first camera and the practitioner position detector, the gaze target estimation mechanism may perform estimation using a configuration other than this. For example, a second camera may be provided in the environment for using the medical simulator S, and an estimated gaze target may be estimated based on image data captured by each camera.

  More specifically, the line-of-sight calculation unit is configured to perform the training based on the image data of the first camera and the trainee position detector and the distance between the first camera and the second camera. The person position vector and the line-of-sight unit vector may be calculated.

  Further, as the gaze target estimation mechanism, the trainee position is obtained based on the image data of the camera, and the trainee is equipped with a contact-type gaze sensor (glasses type) to obtain the gaze unit vector. The estimated gaze target may be estimated. That is, the method of acquiring the trainee position and the line-of-sight unit vector is not limited to the one shown in the embodiment, and various existing methods may be used.

  In addition, in the above-described embodiment, the predetermined reference position is set in the apprentice position detector provided on the head of the medical simulator S. However, each position vector may be calculated using other points as reference positions. I do not care. Further, in the case of medical practice training in which the reference position moves, the correction calculation may be performed in real time for each vector in consideration of the movement amount.

  In the above-described embodiment, the medical simulator S simulates the whole body of the human body, but may also simulate a part of the waist, the face, or the like.

  In the above embodiment, it is described that the applicability of the gaze target of the practitioner is evaluated, but by using the image data of the practitioner position detector of the above embodiment, the movement of the practitioner viewed from the patient is described. You may make it evaluate appropriateness.

  In addition, based on image data including a moving image captured by the first camera or the apprentice position detector, the inclination or posture of the apprentice's body is detected, and an accurate correlation of hand movement is evaluated. It doesn't matter.

  In addition, the total gaze timing and time, position, or gaze time for each estimated gaze target is displayed in comparison with the stored reference value, so that the evaluation result is easily displayed to the practitioner or evaluator. May be. In the embodiment, the appropriateness is comprehensively evaluated based on the spatial and temporal coincidence between the estimated gaze object and the reference gaze object. For example, only the spatial coincidence degree or the time The appropriateness may be evaluated based only on the degree of coincidence.

  The matching degree evaluation method in the appropriateness evaluation unit is not limited to that shown in the embodiment. For example, the degree of coincidence may be evaluated higher as the difference from the reference value is smaller, and the degree of appropriateness may be evaluated higher.

  In the embodiment, the gaze target position vector stored in the gaze target position vector storage unit 22 may be set not only by measuring in advance but also by other methods. For example, the gaze target position vector may be calculated by calculation based on the direction and distance from the reference position to each target, and the value may be stored in the gaze target position vector storage unit 22. In short, the setting method of the gaze target position vector is not limited to that described in the embodiment, and various setting methods may be used. Further, the calculation method of the trainee position vector, the line-of-sight unit vector, the virtual line-of-sight line, etc. is not limited to the one described in the above embodiment, and various known methods may be used.

  In addition, as a method for estimating the appropriateness of medical practice training, a method other than a line-of-sight vector may be used. For example, the posture, procedure, how to hold the instrument, the position touching the medical simulator S (or patient), how to speak, etc. are conceivable. Each is cut out from the video data, or measured by a device (such as a pressure detection sensor, a strain sensor, a position detection sensor, a shear force sensor, a sound sensor) incorporated in the instrument, the medical simulator S, or the medical simulator usage environment 1 Data can be acquired by performing voice recognition through a microphone incorporated in the medical simulator S.

  In the above-described embodiment, the medical practice training appropriateness evaluation device 100 uses the computing capability of the tablet terminal 1f, and the function is realized by executing the program. However, for example, the computing function is provided in the medical simulator S. May be used, and the medical practice training appropriateness evaluation apparatus 100 may be configured using this calculation function. Further, various programs may be executed by a server provided inside or outside the medical simulator use environment 1, and only the calculation result or display output may be performed by the tablet terminal 1f.

  In addition, various modifications and combinations of the embodiments may be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Medical practice training appropriateness evaluation apparatus 1a ... 1st camera 1b ... Trainee position detector 2 ... Gaze target estimation mechanism 21 ... Gaze calculation part 22 ... Gaze target position Vector storage unit 23 ... viewpoint estimation unit 3 ... reference gaze target position storage unit 4 ... appropriateness evaluation unit 5 ... gaze time estimation unit 6 ... reference gaze time storage unit 7 ... gaze Ratio estimation unit 8 ・ ・ ・ Standard gaze ratio storage unit 9 ・ ・ ・ Mode switching unit S ・ ・ ・ Medical simulator PR ・ ・ ・ Practitioner

Claims (9)

A gaze target estimation mechanism that estimates a position of an estimated gaze target that is a target that a practitioner performing medical practice training with a medical simulator simulating part or all of the human body, and
A reference gaze target position storage unit that stores a plurality of reference gaze target positions set as targets to be watched by an apprentice during the medical practice training;
A medical practice training comprising: an appropriateness evaluation unit that evaluates the appropriateness of an apprentice's gaze target based on the degree of coincidence between the position of the estimated gaze target and a plurality of positions of the reference gaze target Appropriateness evaluation device. The reference gaze target is composed of a patient gaze target set on the medical simulator and a surrounding gaze target set to another target other than the medical simulator,
The appropriateness evaluation unit calculates the appropriateness based on the degree of coincidence between the positions of the plurality of estimated gaze targets estimated by the gaze target estimation mechanism and the positions of the patient gaze target and the surrounding gaze targets. The medical practice training appropriateness evaluation device according to claim 1, which is configured to evaluate. In the medical practice training, a plurality of acts are sequentially performed by a practitioner,
The reference gaze target position storage unit stores the reference gaze target set in correspondence with each action,
The medical care according to claim 1 or 2, wherein the appropriateness evaluation unit is configured to evaluate the appropriateness based on a degree of coincidence between the position of the estimated gaze target and the position of the reference gaze target in each action. Action training appropriateness evaluation device. A gaze time estimation unit that estimates an estimated gaze time that is a length of time that an apprentice is gazes at the estimated gaze target;
A reference gaze time storage unit that stores a reference gaze time that is a length of time that an apprentice should gaze at the reference gaze target;
The medical practice training appropriate according to any one of claims 1 to 3, wherein the appropriateness evaluation unit is configured to evaluate the appropriateness based on a degree of coincidence between the estimated gaze time and the reference gaze time. Degree evaluation device. Estimate that is a ratio of an estimated part gaze time that is the length of time that the apprentice is watching the patient gaze target and an estimated ambient gaze time that is the length of time that the apprentice is watching the surrounding gaze target A gaze ratio estimation unit for estimating a gaze ratio;
The ratio of the reference part gaze time that is the length of time that the apprentice should watch the patient gaze target and the reference peripheral gaze time that is the length of time that the apprentice should watch the surrounding gaze target A reference gaze ratio storage unit for storing a certain reference gaze ratio;
The medical practice training appropriateness according to any one of claims 1 to 4, wherein the appropriateness evaluation unit is configured to evaluate the appropriateness based on a degree of coincidence between the estimated gaze ratio and the reference gaze ratio. Evaluation device. The gaze target estimation mechanism is
A gaze target position vector storage unit that stores a gaze target position vector that is a position vector from a predetermined reference position to each target that can be watched by the apprentice;
Line-of-sight calculation for calculating an apprentice position vector, which is a position vector from the reference position to the trainee, and a line-of-sight unit vector indicating the direction in which the trainee is gazing based on image data captured to include the trainee And
The viewpoint estimation part which estimates the said estimated gaze target of a practitioner based on the said gaze target position vector, the said practitioner position vector, and the said gaze unit vector. Medical practice training appropriateness evaluation device. The gaze target estimation mechanism is
A first camera that is provided at a location other than the reference position and that captures an apprentice and generates image data;
A practitioner position detector that is provided at the reference position and generates an image data by capturing the practitioner and detects a direction and a separation distance from the reference position to the practitioner; and
The line-of-sight calculation unit is based on the image data of the first camera or the trainee position detector, and the orientation and separation distance from the reference position detected by the trainee position detector to the trainee. The medical practice training appropriateness evaluation apparatus according to claim 6, configured to calculate the trainee position vector and the line-of-sight unit vector. The gaze target estimation mechanism is
A first camera that captures an apprentice and generates image data;
A second camera that is provided at a different location from the first camera and that captures the trainee and generates image data;
The line-of-sight calculation unit, based on the image data of the first camera and the second camera, and the separation distance between the first camera and the second camera, the trainee position vector and the line of sight The medical practice training appropriateness evaluation device according to claim 6, configured to calculate a unit vector. A mode switching unit that switches between an evaluation mode in which the appropriateness evaluation is performed by the appropriateness evaluation unit and a storage mode in which the reference gaze target position storage unit stores the position of the reference gaze target;
The said reference | standard gaze object position memory | storage part in the said memory | storage part mode is comprised so that the position of the presumed gaze object estimated by the said gaze object estimation mechanism may be memorize | stored as a position of the said reference gaze object. The medical practice training appropriateness evaluation apparatus according to any one of the above.