CN107045592B - Anthropological evaluation system for laparoscopic surgery operation - Google Patents
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Abstract
The invention discloses a anthropological evaluation system for laparoscopic surgery operation, which comprises a laparoscopic camera, a scene camera, an eye tracker and a singlechip, wherein the laparoscopic camera, the scene camera and the eye tracker are respectively connected with the singlechip; the laparoscope camera collects the movement track of the instrument, the scene camera records the scene of an operating room in real time, and the eye tracker records the hot spot area, the pupil diameter and the blinking frequency of eyeball movement; thereby obtaining the main evaluation index of human factors.
Description
Technical Field
The invention belongs to the technical field of human factors engineering of surgery, and relates to a human factor evaluation system for laparoscopic surgery operation.
Background
In recent years, laparoscopic surgery is more and more widely applied, unlike traditional open surgery in which a surgeon can directly see and perceive a patient organ and a focus, in the laparoscopic surgery process, a surgeon cannot directly see a surgical site, and needs to establish a relationship between a medical image and a patient entity in the brain and perform a surgical operation in a real-time image guidance manner. Therefore, the eye-hand coordination training of laparoscopic surgery becomes more complicated, and also brings new challenges to the skill training and objective evaluation of physicians. In order to evaluate the skill of the surgeon's eye-hand fit and the efficacy of the surgical procedure during laparoscopic surgery, accurate records of the operation and the physician's performance are required.
Anthropology, also known as anthropology, ergonomics, etc., is the subject of studying factors such as anatomy, physiology, and psychology of a person in a certain working environment, studying the interaction between the person and the machine and the environment, and evaluating the problems of working efficiency, human health, safety, and comfort, etc. Due to different training and experience, there are differences in the understanding of each physician on the patient and the disease, in the interpretation capabilities of the medical images presented, and in the skills performed during the surgery, which is the general capabilities of the surgeon. The research on the comprehensive abilities of the operators is generally called human factors (human factors), and the factors such as the working performance of surgeons, psychological load, eye-hand coordination and surgical team coordination are the evaluation indexes of human factors. The existing patent 'an intelligent surgical procedure video recording system (103932791B)' records the data of a surgical camera system comprising a camera device and a video receiving terminal, completely records the whole surgical procedure, and can be used for storing data and academic communication; help the cultivation of low-age capital doctors; is helpful for reducing operation errors. Another patent, "multimedia medical recording component and data access method thereof" (201510106967.2), provides a multimedia medical recording component and data access method thereof. The multimedia medical record component comprises a database terminal and a management terminal, wherein the management terminal receives medical records provided by doctors and/or patients during remote online consultation and offline. In these techniques, the recording, storage and transmission of surgical procedures are focused on the purpose of surgical review, feedback and teaching only, but there is insufficient data recording for analyzing the surgeon's anatomy to achieve the ultimate goal of improving surgical tools and methods and reducing medical errors and adverse events.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a human factor evaluation system for laparoscopic surgery operation, which records the scenes of the laparoscopic surgery and the behaviors of doctors to evaluate the working efficiency and the operation capacity of the surgical operation of the doctors.
The purpose of the invention is realized by the following technical scheme: a anthropological evaluation system for laparoscopic surgery operation comprises a laparoscopic camera, a scene camera, an eye tracker and a single chip microcomputer, wherein the laparoscopic camera, the scene camera and the eye tracker are respectively connected with the single chip microcomputer; the laparoscope camera collects the movement track of the instrument, the scene camera records the scene of an operating room in real time, and the eye tracker records the hot spot area, the pupil diameter and the blinking frequency of eyeball movement; the evaluation procedure was as follows:
(1) according to the instrument motion track, the surgical task is segmented, the instrument motion track I (x, y), the duration Th, the difficulty index E and the corresponding time frame sequence of different surgical tasks are obtained, and the obtained result is input into the single chip microcomputer;
(2) the single chip microcomputer respectively extracts an operating room scene, a hot spot region Sp (x, y) of eyeball motion, a pupil diameter Ps, a blinking frequency Bf and a blinking duration Bd under different tasks according to the time frame sequence segmented in the step 1;
(3) aiming at each operation task, calculating an operation scene interference value D by using the extracted operation room scene according to a video frame similarity clustering algorithm; obtaining fluctuation slope Pc/Th in the time frame sequence of the task according to the pupil diameter Ps (Pc is the difference between the maximum pupil diameter and the minimum pupil diameter in the time frame sequence of the task), thereby obtaining the human factor evaluation index of the doctor when the doctor performs the operation task:
operation alertness: v ═ E × Th/D;
task pressure index: TLI is V + (Bf/Bd + Pc/Th)/2;
eye-hand coordination index: EHCI is 100W/Th; w represents the hot spot superposition rate of the instrument movement and the eyeball movement locus.
And (3) skillfully maturing: OPI ═ E × EHCI/Th.
The invention achieves the following beneficial effects: by means of comprehensive scene records and human factor index records, the method can be used for evaluating the working efficiency of doctors and analyzing the operation accuracy of the doctors, and achieves the final aims of reducing medical errors and adverse events and enhancing the safety of patients.
Drawings
FIG. 1 is a technical roadmap for the present invention;
FIG. 2 is a view showing the construction of a recording apparatus according to the present invention;
FIG. 3 is a graph showing the change in pupil diameter Ps during a cholecystectomy procedure;
FIG. 4 is a diagram showing the change of the diameter Ps of the pupil under the task of ligation of the cystic artery;
FIG. 5 is a diagram of the hotspot region Sp (x, y) of eye movement for the cholecystectomy task;
FIG. 6 is a diagram of the hotspot region Sp (x, y) of eye movement under the task of gallbladder artery ligation;
in the figure, 1, a scene camera 2, an instrument track tracking 3, an eye tracker 4 and a single chip microcomputer.
Detailed Description
The invention relates to a anthropology evaluation system for laparoscopic surgery operation, which comprises a laparoscopic camera, a scene camera, an eye tracker and a single chip microcomputer, wherein the laparoscopic camera, the scene camera and the eye tracker are respectively connected with the single chip microcomputer; the system records operation scenes and eyeball movement through each recording device, and comprises the following specific steps:
1. recording the operation scene: including operation picture recording and operating room environment recording. The laparoscope operation picture is directly output through the laparoscope lens, so that the motion track point of the instrument is obtained. The scene picture of the operating room can be acquired by four high-definition cameras, the spatial layout of the operating room and the operating bed, the body position state of a patient, the working state of operating room staff (doctors, anesthesiologists, nurses and the like) and various sound records in the operating process are recorded in real time, and the process is called as working scene recording.
2. And (3) eyeball motion tracking recording: when eyes stare at different positions of the display screen of the endoscope, eyeballs can correspondingly rotate, so that an observed object falls on the fovea of the retina, and under the condition that the head is assumed to be basically motionless, the sight line directions form a one-to-one corresponding relation with points on the computer screen. Thus, the eyeball state, namely the sight line direction, is monitored, and the position corresponding to the position on the screen can be known. Eye tracking (Eye tracking) is a method of continuously tracking and recording Eye changes by capturing infrared rays reflected from the cornea and pupil of a human Eye through an Eye tracker using an image processing technique using a special camera capable of locking the Eye, thereby achieving the purpose of recording the Eye tracking process, and then processing and analyzing the original data. The eye tracker is a glasses type eye movement monitoring device, when a doctor wears the eye tracker, the eye movement track of a surgeon can be monitored, a fixation point track graph is obtained, visual attention points of the surgeon in the operation process are accurately recorded through eye position positioning, coordinate transformation and fixation point positioning, and meanwhile pupil size, pupil fluctuation curves, blink frequency and the like of the surgeon during operation can be recorded, so that the alertness and the eye-hand matching ability of the doctor are deeply researched.
The present invention will be further illustrated with reference to the following examples.
Example 1 this example is directed to a gallbladder operation, which mainly involves two tasks, gallbladder resection and gallbladder artery ligation, for which the anthropological index of the operating physician using the system of the present invention is evaluated as follows:
as shown in fig. 2, a human factor evaluation system for laparoscopic surgery operation comprises a laparoscopic camera, a scene camera, an eye tracker and a single chip microcomputer, wherein the laparoscopic camera, the scene camera and the eye tracker are respectively connected with the single chip microcomputer; the laparoscope camera collects the movement track of the instrument, the scene camera records the scene of an operating room in real time, and the eye tracker records the hot spot area, the pupil diameter and the blinking frequency of eyeball movement; the evaluation procedure was as follows:
(1) according to the instrument motion track, the surgical task is segmented, the instrument motion track I (x, y), the duration Th, the difficulty index E and the corresponding time frame sequence of different surgical tasks are obtained, and the obtained result is input into the single chip microcomputer;
wherein E is the level of the surgical task and is obtained according to the national institutes of health and family planning surgical classification catalog 2015 year edition.
(2) The single chip microcomputer respectively extracts an operating room scene, a hot spot region Sp (x, y) of eyeball movement, a pupil diameter Ps, a blinking frequency Bf and a blinking duration Bd under different tasks according to the time frame sequence (operation task time period) divided in the step 1; wherein the change of the pupil diameter Ps under the cholecystectomy task is shown in figure 3, and the change of the pupil diameter Ps under the cholecystectomy task is shown in figure 4. The hotspot region Sp (x, y) of the eye movement under the cholecystectomy task is shown in fig. 5, and the hotspot region Sp (x, y) of the eye movement under the cholecystectomy task is shown in fig. 6. And the overlapping rate W of the hand motion trajectory and the eyeball hot spot area is obtained as shown in table 1.
TABLE 1
(3) Aiming at each operation task, calculating an operation scene interference value D (D is the number of clustering categories) according to a video frame similarity clustering algorithm by using the extracted operation room scene; from the pupil diameter Ps, the fluctuation slope Pc/Th in the time frame sequence of the task is obtained (Pc is the difference between the maximum pupil diameter and the minimum pupil diameter in the time frame sequence of the task), as shown in table 2. Thereby obtaining the human factor evaluation index of the doctor when executing the operation task:
TABLE 2
| Task name | Interference value D | Bf (times) | Bd(min) | Pc/ |
| 1. Gallbladder resection | 56 | 20 | 2.1 | 0.33 |
| 2. Ligation of gallbladder artery | 34 | 8 | 1.3 | 1.6 |
Operation alertness: v ═ E × Th/D; vTask 1＝2*15/56＝53.6％；VTask 1＝1*5/34＝14.7％
Task pressure index: TLI is 100V + (Bf/Bd + Pc/Th)/2;
TLItask 1＝53.6+(20/2.1+0.33)/2＝58.5
TLITask 2＝14.7+(8/1.3+1.6)/2＝18.6
Eye-hand coordination index: EHCI 100W/Th
EHCITask 1＝75.7/15＝5.0
EHCITask 2＝87.6/5＝17.5
And (3) skillfully maturing: OPI ═ E × EHCI/Th
OPITask 1＝2*5.0/15＝0.667
OPITask 2＝1*17.5/5＝3.5
According to the video recorded by the instrument, the doctor is evaluated according to the traditional expert scoring method, the evaluation result is compared with the output result of the system, the coincidence rate reaches 98%, and the deviation is below 0.5%. Therefore, the system of the present invention can be widely applied to human evaluation by physicians.
Claims (1)
1. A anthropological evaluation system for laparoscopic surgery operation is characterized by comprising a laparoscopic camera, a scene camera, an eye tracker and a single chip microcomputer, wherein the laparoscopic camera, the scene camera and the eye tracker are respectively connected with the single chip microcomputer; the laparoscope camera collects the movement track of the instrument, the scene camera records the scene of an operating room in real time, and the eye tracker records the hot spot area, the pupil diameter and the blinking frequency of eyeball movement; the evaluation procedure was as follows:
(1) according to the instrument motion track, the surgical task is segmented, the instrument motion track I (x, y), the duration Th, the difficulty index E and the corresponding time frame sequence of different surgical tasks are obtained, and the obtained result is input into the single chip microcomputer;
(2) respectively extracting an operating room scene, a hot spot region Sp (x, y) of eyeball movement, a pupil diameter Ps, a blinking frequency Bf and a blinking duration Bd by the single chip microcomputer under different operation tasks according to the time frame sequence segmented in the step (1);
(3) aiming at each operation task, calculating an operation scene interference value D by using the extracted operation room scene according to a video frame similarity clustering algorithm; obtaining a fluctuation slope Pc/Th in the time frame sequence of the surgical task according to the pupil diameter Ps, wherein Pc is the difference between the maximum pupil diameter and the minimum pupil diameter in the time frame sequence of the surgical task, so as to obtain a human factor evaluation index of a doctor when the doctor performs the surgical task:
operation alertness: v = E Th/D;
task pressure index: TLI = V + (Bf/Bd + Pc/Th)/2;
eye-hand coordination index: w represents the hot spot superposition rate of the instrument movement track and the eyeball movement track;
and (3) skillfully maturing: OPI = E EHCI/Th.
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| CN103271784A (en) * | 2013-06-06 | 2013-09-04 | 山东科技大学 | Man-machine interactive manipulator control system and method based on binocular vision |
| CN103932791A (en) * | 2014-03-13 | 2014-07-23 | 西安交通大学 | Intelligent surgical operation process video recording system |
| CN104658393A (en) * | 2015-02-10 | 2015-05-27 | 上海理工大学 | Evaluation system and method for training of laparoscopic surgery simulation |
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| CN103271784A (en) * | 2013-06-06 | 2013-09-04 | 山东科技大学 | Man-machine interactive manipulator control system and method based on binocular vision |
| CN103932791A (en) * | 2014-03-13 | 2014-07-23 | 西安交通大学 | Intelligent surgical operation process video recording system |
| CN104658393A (en) * | 2015-02-10 | 2015-05-27 | 上海理工大学 | Evaluation system and method for training of laparoscopic surgery simulation |
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| 基于眼动分析的不同光环境下岸桥司机的专注度;卫旭骏 等;《大连海事大学学报》;20150831;第41卷(第03期);第93-99页 * |
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