Distraction With Virtual Reality From Pain and Anxiety for Patients With Hematological Malignancies

The goal of this clinical trial\] is to study the effectiveness of Virtual Reality (VR) in reducing pain and anxiety during painful procedures for patients with hematological malignancies The main question\[s\] it aims to answer are: Does VR effectively reduce pain during painful procedures for patients with hematological malignancies ? Does VR effectively reduce anxiety during painful procedures for patients with hematological malignancies ? Interventional group (intra-group comparaison): This design allows each patient to act as his own control.: The intervention consists of a complete sequence involving three phases: Period 1 (standard care), a washout period of at least seven days, and Period 2 (VR session). External control group (inter-group comparaison): Patients will be assigned to the intervention group first, and then a matching external control patient will be selected based on age and type of procedure.