This chapter provides a comprehensive exploration of medical devices and instrumentation, building on the foundational principles and applications of biomedical engineering. It begins by tracing the historical development of medical devices, highlighting key innovations that have shaped clinical practice and device design (Sect. 2.1). The section then examines technical characteristics, fundamental components (Sect. 2.2), and specialized devices, including imaging systems (Sect. 2.3), electrocardiographs (Sect. 2.4), blood pressure (Sect. 2.5) and patient monitors (Sect. 2.6), mechanical ventilators (Sect. 2.7), anesthesia machines (Sect. 2.8), pacemakers, defibrillators (Sect. 2.9), neonatal incubators (Sect. 2.10), and surgical instruments (Sect. 2.11). Each chapter discusses clinical applications, regulatory considerations, and safety standards, emphasizing their role in diagnostics, monitoring, therapy, and patient care. The section concludes by addressing emerging trends and innovations, including miniaturization, wearable technology, smart devices (Sect. 2.12), robotic systems (Sect. 2.13), implantable pumps (Sect. 2.14), and smart pills (Sect. 2.15), highlighting their potential to transform healthcare delivery and advance precision medicine.