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Medical Instruments and Devices

Updated: Sep 7, 2021

1. Biopotential Amplifiers

2. External Defibrillators

3. Implantable Cardiac Pacemakers

4. Model Investigation of Pseudo-Hypertension in Oscillometry

6. External Defibrillators

6.1 Introduction

6.2 Mechanism of Fibrillation

6.3 Mechanism of Defibrillation

6.4 Clinical Defibrillation

6.5 Electrodes



7. Implantable Defibrillators

10. Mechanical Ventilation

11. Essentials of Anesthesia Delivery



12. Electrosurgical Devices

12.1 Introduction

  • Electrosurgical unit (ESU) - pass high-freq electronic current ผ่าน biological tissues เพื่อ modification tissue such as -> cutting , coagulation , desiccation , ablation , lesioning, shrinkage , sealing , fusion

  • HF or high-freq surgery หรือ surgical diathermy

  • wave above 200kHz เพื่อ minimize potential for neuromuscular stimulation

  • มีใช้หลายแบบๆ various form , ตั้งแต่ 1920

  • Cutting - ใช้ continuous sinusoidal waveform

  • coagulation - ใช้ series sinusoidal wave packets

  • Mono / bipolar - ต่างกันที่electrical current ที่ผ่าน และ leave ออกจาก tiss

12.2 Theory of Operation

12.3 Monopolar Mode

12.4 Dispersive Electrodes

12.5 Bipolar Mode

12.6 ESU Hazards


Reference

  1. PDF Medical Instruments and Devices

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