Investigation of the effect of subcutaneous microstructure and gel-like mat to prevent vascular closure against body surface pressure accompanied with shear

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04179
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Yamada Hiroshi 九州工業大学, 大学院生命体工学研究科, 教授 (00220400)
• Co-Investigator(Kenkyū-buntansha): 自見 至郎 福岡大学, 公私立大学の部局等, 研究特任教授 (30226360) ; 田中 マキ子 山口県立大学, 看護栄養学部, 教授 (80227173) ; 森田 康之 熊本大学, 大学院先端科学研究部(工), 教授 (90380534)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 褥瘡 / 皮下組織 / ゲル / 圧力 / ずれ

Outline of Final Research Achievements

In the subcutaneous adipose tissue which contacts with the skeletal muscle of the porcine shoulder, the displacement occurred mainly in the superficial fascia under shear. Mattresses with a layer of gel-like material showed less deformation-resistance than urethane foam under shear. Analysis of the closure behavior of the forearm cephalic vein using ultrasonography showed that pressure on the skin surface easily closed the vein, whereas the contribution of shear tended to be small. Based on the above results, the effect of shear on venous closure is clearly smaller than that of compression, and it is speculated that the effect of gel-like material on shear in preventing pressure injury is reduced accordingly.

Free Research Field

生体力学

Academic Significance and Societal Importance of the Research Achievements

皮膚表面をずらしたときに皮膚と骨格筋の間に存在する皮下脂肪組織中の浅筋膜に主にずれが生じることを微細構造と関連づけて定量的に示したことは学術的意義がある．また，ゲル様材料の層はウレタンフォームのマットレスに比べてずれに対する変形抵抗が小さいものの，超音波測定では前腕橈側皮静脈は皮膚表面の圧迫に対して容易に閉塞するのに対して，ずれが閉塞に及ぼす寄与が小さいことと関連付けることにより，ずれに対するゲル様材料の層の褥瘡予防効果がその分だけ小さいことを分かりやすく示唆できた．