## 4 HCI Information Content  
[PERSON] [27] has divided the HCI behavior of minimally invasive surgery robots into explicit information interaction behavior, implicit information interaction behavior, and potential information interaction behavior. Explicit information refers to the type of information that users can intuitively obtain to meet the basic needs of doctors during the surgery process; implicit interaction information refers to the information generated by data from interaction; and potential interaction information refers to the information interaction behavior that is currently unrealized but may be achieved in the future with technology development. The UCD concept in the field of design studies focuses more on the research of explicit information [4]. This article further divides explicit information into decision-making information, command information, and feedback information based on the interaction process and the three-level theory of product information processing proposed by [PERSON] in emotional design [38], and summarizes and sorts out the related content, as shown in Table 2.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Type** & **Information** & **Representative Products** \\ \hline \multirow{4}{*}{
\begin{tabular}{c} **Category** \\  
1. Decision-making information: Decision-making information refers to the information provided to doctors at each stage of surgery to decide the next step [33]. Doctors can understand patient lesions, tissue, and the equipment's relative positions through decision-making information, forming references and a decision-making basis, and assisting in surgical protocol planning and execution. Based on the source of information, it can be divided into machine information, patient information, and environmental information. Machine information is the information of the machine equipment itself, such as the position of the mechanical arm, the operating status of the machine, and the information on the machine exterior. Patient information is mainly various postures and subcutaneous information, such as the location of lesions or vascular structures. This part of the information presents a real and accurate tissue model in the system through 3D reconstruction technology and IGS, and displays features that are not easily distinguished by the naked eye [39]. Environmental information mainly refers to the information content provided by assistant doctors in the surgical team. The main surgeon makes decisions by taking a holistic view and based on any additional information outside of the field of vision. 2. Command information: Command information is the information that doctors input into the minimally invasive surgery robots in the master-slave interaction framework. According to different input methods, command information can be divided into physical information and biological information [40]. Physical information refers to the command information input through devices such as display screens, mice,  
\begin{table}
\begin{tabular}{c c c c} \hline  & & **Type** & **Information** & **Representative Products** \\ \hline \hline \multirow{4}{*}{
\begin{tabular}{c} **Features** \\  
joysticks, and touch screens, which can realize automatic or semi-automatic execution [41]. Biological information refers to the type of information formed through input methods such as voice, vision, gestures, and touch. After the command information is input into the minimally invasive surgery robot system through sensors, it drives the mechanical arm to simulate the doctor's actions and complete the surgery, achieving the purpose of separation, cutting, suturing, etc. [42]. 3. Feedback information: Feedback information is the response and result feedback of the minimally invasive surgery robot system to operation instructions, which is divided into two types according to the content: result feedback information and safety feedback information.