we Use Recovery Time to Assess Post-dialysis Fatigue and we Use Also Two Different Fatigue Scales 1- Visual Analogue Scale 2- Fatigue Severity Scale and we Address Risk Factors of PDF and Apply the Scales on Regular Hemodialysis Patients in Hemodialysis Unit of Assiut University Hospital

Post-dialysis fatigue (PDF) is a prevalent and debilitating symptom among patients undergoing regular hemodialysis, characterized by a persistent sense of physical and mental exhaustion following dialysis sessions This condition adversely affects patients' quality of life, daily functioning, and adherence to treatment regimens .Despite its high prevalence, PDF remains under-recognized and inadequately addressed in clinical practice. The etiology of PDF is multifactorial, encompassing physiological, psychological, and lifestyle-related factors. Recent studies have identified several predictors of PDF, including sleep disorders, the presence of comorbidities, the number of weekly dialysis sessions, and the duration of hemodialysis treatment . The symptoms and severity of PDF are evaluated using various scales. In cases of PDF, to examine the subjective symptoms of patients themselves, it is useful to utilize patient-based outcomes. However, in conventional PDF studies, the evaluation indices have not been uniform. First, in studies evaluating fatigue after dialysis based on the "time," "frequency," and "intensity" the reliability and validity of the scales were not examined. Second, the recovery time is not an index that measures PDF directly but instead an indirect indicator that measures the "time to recover from hemodialysis." Third, the fatigue scale does not measure true PDF but rather chronic fatigue experienced by dialysis patients .

in that research we use time recovery to assess post-dialysis fatigue and we use also two different fatigue scales visual analogue scale to evaluate fatigue severity and fatigue severity scale In that research we address risk factors of PDF and apply the scales on regular hemodialysis patients in hemodialysis unit of Assiut University Hospital.

Inclusion criteria

• • End stage renal diseases (ESRD) patients who receive hemodialysis 3 times a week for 4 h each time.

• > 20 years of age.
• Both sexes.
• Patients with stable clinical examination.
• Patients who receiving hemodialysis for more than 3 months.
• All patients were able to go to the center for hemodialysis on their own.
• All patients who accept to share in the research.

Exclusion criteria

• • Ages below 20 years.

• Patients with severe cardiovascular and cerebrovascular diseases.
• Mental illness that is difficult to diagnose and treat.
• Surgery within the past month.
• Patients with acute infections.
• Pregnancy.
• Presence of malignancy.
• Undergoing fracture treatment, and serious mobility.
• patients with eye problems.