Presenter ： Chung-Yi Chiu Date ： April 23th An Overview of Technologies Related to Care for Venous Leg Ulcers Meghan Sarah Hegarty, Student Member, IEEE, Edward Grant, Senior Member, IEEE, and Lawrence Reid Jr. IEEE TRANSACTIONS ON INFORMATION TECHNOLOGY IN BIOMEDICINE, VOL. 14, NO. 2, MARCH 2010

Outline Introduction Compression Therapy Wearable Sensor Networks Discussion Conclusions 2015/8/19 2

Introduction (1/5) Between – persons living in the United States are suspected to be suffering from venous leg ulcers Treatment costs for this condition are substantial. $775 million to $1 billion annually 2015/8/19 3

Introduction (2/5) Health Care Financing Administration restrictions Medical Expenses 2015/8/19 4

Introduction (3/5) Compression therapy : Cornerstone Healing rates of 40%–70% after three months of therapy. Healing rates of 50%–80% after six months of therapy. 2015/8/19 5

Introduction (4/5) Compression therapy : Uncomprehend Patient's condition Quantitative data Dangerous side effects Low effect 2015/8/19 6

Introduction (5/5) Compression technology. Portable monitoring of chronic health conditions Improve compression therapy 2015/8/19 7

Compression Therapy Compression Therapy (1/8) 2015/8/19 8 Compression Bandages A. Inelastic compression a) Short-stretch bandages b) Semi-rigid zinc plaster bandages c) Approximately 40 mmHg ~20 mmHg d) Pressure with in the first few hours

Compression Therapy Compression Therapy (2/8) 2015/8/19 9 Compression Bandages B. Elastic compression a) Elastic fibers b) Compression for a long time c) Pressure is less than the Inelastic compression

Compression Therapy Compression Therapy (3/8) 2015/8/19 10 Compression Bandages C. Four-layer bandages a) An absorbent pad b) Crepe c) A long-stretch bandage, d) A medium stretch cohesive outer wrap e) Pressure for 5 to 7 days

Compression Therapy Compression Therapy (4/8) 2015/8/19 11 Compression Bandages 1. Ulcer healing rates of 40%–70% in three month 2. Specialty of medical personnel 3. The amount of pressure applied 4. Too loosely 5. Too tightly

Compression Therapy Compression Therapy (5/8) 2015/8/19 12 Compression stockings A. long-stretch elastic bandages B. activity and rest C. Gradient

Compression Therapy Compression Therapy (6/8) 2015/8/19 13 Compression stockings

Compression Therapy Compression Therapy (7/8) 2015/8/19 14 Compression stockings  Advantage Put on and take off Pressure for longer periods of time Pressure is not easy to change

Compression Therapy Compression Therapy (8/8) 2015/8/19 15 Compression stockings  Defect Removed at night if the amount of pressure delivered exceeds 30 mmHg Skin allergies

Wearable Sensor Networks Wearable Sensor Networks 2015/8/19 16

wireless health monitoring systems wireless health monitoring systems (1/8) 2015/8/19 17 Tier-1 Sensors and Sensor Nodes Tier-2 Personal Server Tier-3 Upper Level Services

wireless health monitoring systems wireless health monitoring systems (2/8) 2015/8/19 18 Tier-1 Sensors and Sensor Nodes Electrode 、 Pressure 、 Transducer 、 Accelerometer Amplifiers 、 Filters portable health monitoring include ECG 、 photoplethysmography (PPG)

wireless health monitoring systems wireless health monitoring systems (3/8) 2015/8/19 19 Tier-1 Sensors and Sensor Nodes Respect to monitoring the peripheral vascular system 1) Activity level 2) Leg volume (impedance plethysmography IPG) 3) Blood flow velocity (Continuous Wave Doppler Ultrasound) 4) Blood oxygen and peripheral pulse (using PPG):

wireless health monitoring systems wireless health monitoring systems (4/8) 2015/8/19 20 Tier-1 Sensors and Sensor Nodes

wireless health monitoring systems wireless health monitoring systems (5/8) 2015/8/19 21 Tier-1 Sensors and Sensor Nodes

wireless health monitoring systems wireless health monitoring systems (6/8) 2015/8/19 22 Tier-2 Personal Server Data Collection Transport Layer Management

wireless health monitoring systems wireless health monitoring systems (7/8) 2015/8/19 23 Tier-2 Personal Server objective Power management, Reliable communication, Efficient processing algorithms, Data storage

wireless health monitoring systems wireless health monitoring systems (8/9) 2015/8/19 24 Tier-3 Upper level Services 1. General research 2. Virtual medicine remote monitoring 3. Emergency response

wireless health monitoring systems wireless health monitoring systems (9/9) 2015/8/19 25 Tier-3 Upper level Services objective Data management security Integration with existing healthcare infrastructure

Discussion 2015/8/19 26 a simple means by which the amount of pressure being applied can be dynamically altered. prevent damage to the tissue and/or arterial reflux compression stockings/bandages with the controllability of IPC systems

Discussion 2015/8/19 27 A. Compression stocking B. Physiological sensor nodes C. Intelligent control algorithm D. Mobile computing device E. Centralized datebase

Conclusion 2015/8/19 28 quantitative information wireless sensor networks a wearable vascular health monitoring system individualizing therapy reducing treatment times

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