The investigators developed the service showing patient health record altogether which is managed by each hospital separately and recording the patient health information based on mobile application. This study is a multi-centered study involving three hospitals, providing services to patients, care givers and medical staffs. After the participants use this service, the investigators evaluate the effectiveness and satisfaction of this service through questionnaires and in-depth interviews.

• Background: In emergency situations there are difficulties for treatment in that patient health records are not immediately provided because patient information is separately managed by each hospital. Another reason for the difficulty is that if the patients don't know their personal health record, they can't inform medical staffs of it. In addition, the increase of emergency situation of the chronically ill is also problematic. And patients have a growing desire for their health information. In this situation, the investigators developed the service showing patient health record altogether which is managed by each hospital separately and recording the patient health information based on mobile application.

• Objective: This study evaluates the effectiveness and satisfaction of the developed service in the emergency situation

• Design: Mixed method(questionnaires and interview)

• Setting: In the Department of Emergency at the Samsung Medical Center, the Asan Medical Center, the Dong-A Medical Center, and cooperative hospitals

• Enrollment: 1,000 patients(care givers) and about 12 medical staffs

• Intervention

  1. Patients or care givers

     1. 1,000 patients(care givers) are enrolled and use the personal health wallet service.
     2. The participants fill out questionnaire to evaluate the service
     3. Some of them are invited for an in-depth interview.

  2. Medical staffs

     1. About 12 medical staffs are enrolled and use the personal health wallet service.
     2. After that, the medical staffs are invited for an in-depth interview.

Inclusion Criteria:

1. SUS-based usability assessment and survey

   • Patient and caregivers of emergency room at Samsung Medical Center
   • Adults over 19 years old.
   • Those who voluntarily agreed to participate in the research
   • Patients who are past the acute period and in stable condition can agree with them

2. Interview

   • Users of the personal health wallet service for emergency situations among patients and caregivers in the emergency room of Samsung Medical Center
   • Medical staffs at Samsung Medical Center and associated hospitals
   • Adults over 19 years old.
   • Those who voluntarily agreed to participate in the research

Exclusion Criteria:

1. SUS-based usability assessment and survey

   • Anyone who disagrees with this study
   • Patients who are not conscious when leaving the emergency room, patients who are not aware of or are not aware of their orientation, patients who are not aware of their level of awareness, or people who are in shock or in deep shutdown situations) (Even in the above cases, caregivers can be included in the clinical trial target if they are present. )

2. Interview

   • Patient is the same as SUS based usability assessment and exclusion criteria for survey participants
   • In the case of medical staffs, those who do not agree with this study