The present study aimed to investigate the psychological effects resulting from the misuse of smart devices in the medical field on patients, and to determine the predictive power of smart device addiction in explaining variance in anxiety, depression, and medical post-traumatic stress disorder. The study employed a predictive descriptive correlational design. The sample consisted of (300) patients, including ICU survivors and patients attending general hospitals in Tripoli, Misrata, and Benghazi, aged 20-60 years, selected by simple random sampling during 2024.The researcher used the Smartphone Addiction Scale SAS-SV (Kwon et al., 2013) and the Psychological Effects Scale including (GAD-7 Anxiety Scale, PHQ-9 Depression Scale, and PCL-5 PTSD Scale), with verified validity and reliability (Cronbach's Alpha = 0.91). Results of multiple regression analysis showed that misuse of smart devices is a strong predictor variable explaining 46% of variance in anxiety, 52% of variance in health achievement and treatment adherence, and 48% of variance in medical PTSD, with a total model R² of 0.66 significant at p<0.001.Results also revealed that 44% of patients suffer from medical PTSD due to delusional memories associated with monitoring device sounds, 62% suffer from sleep disorders, and 68% use smartphones more than 6 hours inside the hospital, increasing their social isolation. The study recommended implementing the "ICU Diaries" protocol, regulating smart device use inside ICUs, and training nurses in psychological support........................... Keywords:....................... Smart Medical Devices, Misuse, Psychological Effects, Health Anxiety, Cyberchondria, Digital Anxiety, Doctor-Patient Trust, e-Patient, Digital Health, Wearable Devices.