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系統識別號 U0026-1302201711032200
論文名稱(中文) 改善STS姿勢性低血壓之穿戴式裝置設計與評估
論文名稱(英文) Design of Wearable Device for Improving the Orthostatic Hypotension during Sit-to-Stand (STS)
校院名稱 成功大學
系所名稱(中) 工業設計學系
系所名稱(英) Department of Industrial Design
學年度 104
學期 2
出版年 105
研究生(中文) 蔡靖慈
研究生(英文) Ching-Tzu Tsai
學號 p36044085
學位類別 碩士
語文別 英文
論文頁數 67頁
口試委員 指導教授-吳豐光
口試委員-陳建旭
口試委員-陳潔瑩
中文關鍵字 坐姿到站姿  姿勢性低血壓  穿戴式裝置  促進血液循環 
英文關鍵字 Sit to Stand  Orthostatic Hypotension  Wearable Device  Blood Circulation. 
學科別分類
中文摘要 造成年長者跌倒的狀況中,不正確的姿勢移轉佔了三成,其中從坐姿轉變成站姿的動作 (Sit-to-Stand, STS) 平均每人每天約進行60次。STS的過程雖然短暫卻使身體經歷大幅度的變化,不但身體重心提升且支撐面積減少,起身瞬間下肢關節所承受的最大力矩為個體體重的4.7倍。因此,STS成為一項評估自主生活能力的重要指標。有許多人曾經在起身時感到眼前一片漆黑並產生暈眩,嚴重的話還有可能造成跌倒,這是由於姿勢性低血壓的發生。而隨著年紀的增長,姿勢性低血壓發生的頻率也隨之提高。姿勢性低血壓是因姿勢改變造成腦部血液流量不足的現象,此時收縮壓下降大於20毫米汞柱以上,舒張壓下降大於10毫米汞柱以上便會產生暈眩、視覺模糊、全身無力等症狀,這些症狀都增加了進行STS時發生意外的風險。因此,本研究希望發展出新型穿戴式裝置以改善姿勢性低血壓的症狀,並提升執行STS的穩定度。
本研究透過觀察、訪談以及文獻探討姿勢低血壓的成因,接著利用焦點團體法的發展,提出有別於現有的改善方式,經果整合與分析後發展新型穿戴式裝置設計。此新型穿戴式裝置透過大幅度的擺盪小腿肌群,使得下肢內部靜脈血管進行舒張與伸縮以刺激下肢血液循環,使血液更快回到心臟以減緩頭部缺氧暈眩的症狀。本研究進行兩次實驗,實驗一為新型穿戴式產品效能評估;實驗二為與現有產品比較評估。實驗一共有六位受測者,每位受測者皆須進行使用裝置前與使用裝置後的實驗與評估。在身體重心軌跡的測量中,六位受測者皆有減少軌跡偏移量,並且提升軌跡密度,顯示此裝置於提升穩定度上的正向結果。實驗二共有十五位受測者,每位受測者皆須進行無使用裝置、使用現有裝置和使用新型裝置三段實驗。使用裝置期間,新型穿戴式裝置的血壓較另兩者有更為明顯的提升,腳背皮膚溫度也較無裝置時有更多的提升。本研究結果顯示透過新型穿戴式裝置設計,能夠促進下肢血液回流至心臟,改善姿勢性低血壓的症狀,使得進行STS更加地穩定順利。
英文摘要 In daily life, Sit-to-Stand (STS) is a common movement, which occurs averagely 60 times in a day. However, especially the elderly, the most common reasons of fall are the improper posture transition and diverting of mass of body, including STS.
Some people’s vision may go black when they stand up quickly. This symptom is caused by Orthostatic Hypotension (OH) when people assume an upright posture. Because blood pools in the legs and splanchnic vasculature during STS, venous returning to the heart is decreased, and subsequently it results in a transient reduction in blood pressure. Symptoms of OH, including faintness, dizziness, confusion or blurry vision, can cause a person to fall, or more seriously, to death. So far, there is no direct therapy can treat OH thoroughly. Therefore, the purposes of this study are: (1) to integrate the methods of prompting blood circulation; then (2) to develop an innovative design for improving OH and enhancing stability of STS. In order to design the automatic device to increase the stability in STS, this study integrates the methods of activating blood circulation of lower limbers through interview with experts and observation on STS. The new design is developed through focus group. Finally, an innovative device of keeping stable in STS has been developed in this study.
This study conducted two experiments. The experiment-1 was to evaluate the effect of the new innovative device by measuring trajectory of body center of gravity and variation of blood pressure. The participants are indicated to accomplish STS 2 times, without device and with device. The result of experiment-2 showed that the length of trajectory was shorter and the density was also higher after using new device. The experiment-2 was conducted to compare the new device with no device and existing device. The participants had to conduct three parts, without device, with existing device, and with new device. The result demonstrated that the blood pressure enhanced more obviously while using new device. The skin temperature of instep was increased during the period of using new device. The result has shown that the new device is capable of stimulating the blood circulation in lower limbs and increasing stability during STS.
論文目次 摘要 I
SUMMARY II
ACKNOWLEDGEMENTS III
TABLE OF CONTENTS IV
LIST OF TABLES VII
LIST OF FIGURES VIII
LIST OF SYMBOLS AND ABBREVIATIONS IX
CHAPTER 1 INTRODUCTION 1
1.1 Background 1
1.1.1 The Impact of Aging on STS 2
1.1.2 Orthostatic Hypotension 2
1.1.3 Development of Wearable Device 3
1.2 Motivation 5
1.3 Objective 6
1.4 Overview of this Study 7
CHAPTER 2 LITERATURE REVIEW 9
2.1 The Movement of STS 9
2.1.1 The Factors Influence the Performance of STS 10
2.2 The Cardiovascular System 11
2.2.1 Blood Vessels 13
2.2.2 The Blood Variation during STS 16
2.3 Orthostatic Hypotension 17
2.3.1 The Cause of Orthostatic Hypotension 18
2.3.2 The Existing Treatment of Orthostatic Hypotension 20
CHAPTER 3 METHODOLGY 21
3.1 Naturalistic Observation 21
3.2 Interview 21
3.3 Focus group 22
3.4 Experiment-1 23
3.4.1 Participant 23
3.4.2 Experimental System 23
3.4.3 Experimental Procedure 24
3.5 The Stage 2 Experiment 26
3.5.1 Participant 26
3.5.2 System of the Stage 2 Experiment 27
3.5.3 Procedure of the Stage 2 Experiment 28
CHAPTER 4 RESULT 30
4.1 Preliminary Investigation 30
4.1.1 Result of Observation 30
4.1.2 Result of Interview 30
4.1.3 Integration of Focus Group 31
4.2 Wearable device design 32
4.2.1 Purpose of design 32
4.2.2 Modeling 32
4.2.3 Operation of Device 33
4.3 Result of the Stage 1 Experiment 33
4.3.1 Trajectory of the CG 33
4.3.2 Blood Pressure 38
4.3.3 HRV 41
4.4 Result of the Stage 2 Experiment 42
4.4.1 The Variation of Blood Pressure during Device Using 44
4.4.2 The Variation of Blood Pressure from Sitting to Standing 46
4.4.3 Skin Temperature of Calf Muscle 47
4.4.4 Skin Temperature of Instep 50
CHAPTER 5 DISCUSSION 52
5.1 Development of new device 52
5.1.1 Previous work 52
5.1.2 Swaying device design 53
5.2 Evaluation of experiment-1 54
5.2.1 Trajectory of CG 54
5.2.2 Blood Pressure 54
5.2.3 Subjective Impressions 54
5.3 Evaluation of experiment-2 55
5.3.1 Blood pressure 55
5.3.2 Skin temperature 56
CHAPTER 6 CONCLUSION 57
6.1 The conclusion 57
6.2 The Limitation of Research 57
6.3 The Future Work 58
REFERENCES 59
Appendix A The difference of MAP during the period of using device in the stage 2 experiment 64
Appendix B The difference of MAP from sitting to standing in the stage 2 experiment 65
Appendix C The difference of skin temperature on calf muscle during the period of using device in the stage 2 experiment 66
Appendix D The difference of skin temperature on instep during the period of using device in the stage 2 experiment 67

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