With the developments in the field of health, Total Knee Replacement (TKR) surgeries are performed by applying evidence-based rapid recovery programs in many hospitals and patients can be discharged in a very short time. This situation imposes more responsibilities on patients and their relatives, especially in the post-operative period, for undertaking care, managing developing health-related conditions, and advancing the treatment process in a positive way. For this reason, it is very important for patients and their relatives to receive training before discharge on issues such as adaptation to daily life, movement, self-care skills, and complications related to post-operative home care. The fact that patients who have TKR surgery are mostly elderly individuals also increases the importance of the subject. At the same time, in order for patient education to be effective, it is very important that the information given is suitable for the level of health literacy, easily readable and understandable in a way that patients can understand. If the transmitted information is not presented in an easy and understandable way, the musculoskeletal functions, quality of life and socio economic productivity of the patients after the surgery will be endangered. In addition, patient education given to patients is not only written; Using visual, auditory and technological materials such as various presentations, videos, photographs, in accordance with different learning styles, provides a more effective coping with the problems in the post-operative period and reduces physical and psychological problems. In this context, it is seen that the use of QR code, which is a digital technological application that has recently been used in the field of health, is an application that can provide an easier understanding of the information transmitted verbally and in writing by healthcare professionals.

Individuals who have undergone TKR surgery want to receive information about many subjects such as patient education, recovery, home care, surgery, movement, pain, exercise, walking, nutrition, working life, weight control, illness, complications. It is very important that the information is appropriate for the level of health literacy and that it is provided not only by written but also by various visual, auditory and technological methods in order to effectively transfer the information needed by the patients during the challenging process that significantly affects their mobility and daily living activities. This study was planned as a randomized controlled study in order to examine the effect of the rapid response QR coded teaching plan prepared according to the health literacy levels of the patients who had TKR surgery on the healing process and quality of life.

Hypotheses of the study:

H1a- Patient education with QR code, which is planned according to health literacy levels, positively affects patients' quality of life.

H1b- Patient education with QR code, which is planned according to health literacy levels, reduces patients' problems on the 15th day after surgery.

H1c- Patient education with QR code, which is planned according to health literacy levels, reduces patients' problems in the 6th week after surgery.

H1d- Patient education with QR code, which is planned according to health literacy levels, affects the postoperative improvement in functional status in patients.

Type of Study: Randomized controlled trial

Method:

102 (51 intervention, 51 control) patients who underwent TKR surgery will be randomized and divided into two groups as intervention and control groups. No intervention will be made to the patients in the control group and the patients will receive routine treatment and care in the clinic. In addition to the routine treatment and care, the patients in the intervention group will be taught with a QR code prepared by the researcher. Data will be collected using the Patient Identification Form, The Patient Learning Needs Scale, Functional Assessment Form, Knee Assessment Questionnaire, Turkish Health Literacy Scale-32, Discharge Data Collection Form, Post-Discharge Day 15 of the Healing Process Data Collection Form, Post-Discharge Week 6 of the Healing Process Data Collection Form and the Quality of Life Scale.

While evaluating the data, it is planned to be analyzed as randomized.It is planned to use multiple completion methods when there are missing data.

Statistical analyzes are planned to be evaluated with the Statistical Package for the Social Sciences (SPSS)-24 package program. It is planned to use frequency charts and descriptive statistics in order to interpret the data, parametric techniques for normal distributions and non-parametric techniques for non-normal distributions.

Inclusion Criteria:

• Not having knee replacement surgery before
• Not having a history of psychiatric problems
• Having known how to read and write
• Having a smart phone
• Having internet access on the phone
• Having been agreed to participate in the research

Exclusion Criteria:

• Having previous knee replacement surgery
• Having a history of psychiatric problems
• Not having known how to read and write
• Not having a smart phone
• Not having internet access on the phone
• Not having been agreed to participate in the research

The assignment to the groups will be carried out by an independent researcher, and the group will be notified via telephone after the practitioner researcher has approved, evaluated the criteria and performed the pre-tests. At the same time, groups will be named A and B and researchers will be blinded during statistical analysis and reporting.It will not be disclosed to the participants and their caregivers in which group they belong. Surveys will be filled in by a different independent researcher blinded to the groups