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Abstract
Breast cancer is the most commonly diagnosed cancer in women worldwide. Although targeted screening programs using mammography have facilitated earlier detection and improved treatment has resulted in a significant reduction in mortality, some negative aspects related to cost, the availability of trained staff, the duration of the procedure, and its non-generalizability to all women must be taken into consideration. Breast palpation is a simple non-invasive procedure that can be performed by lay individuals for detecting possible malignant nodules in the breast. It is a simple test, based on the haptic perception of different stiffness between healthy and abnormal tissues. According to a survey we carried out, despite being safe and simple, breast self-examination is not carried by women because they are not confident of their ability to detect a lump. In this study, a non-invasive wearable device designed to mimic the process of breast self-examination using pressure sensing textiles and thus increase the confidence and self-awareness of women is proposed. Combined with other screening methods, the device can increase the odds of early detection for better prognosis. Here, we present the physical implementation of the device and a finite element analysis of the mechanics underlying its working principle. Characterization of the device using models of large and medium breast phantoms with rigid inclusions demonstrates that it can detect nodules in much the same way as does the human hand during breast self-examination.
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DING WENJING, WANG YANG, LI GUOJUN, HANG JIAJI, WU YONGCHANG, LING CHENHAO, ZHOU DANYE, CHEN ZHIBIN, GAO LINGFENG. PIEZORESISTIVE STRAIN SENSOR APPLICATION IN EVALUATION OF MOUSE AORTIC MEDIA CUSHIONS EFFECTIVENESS AND SPONTANEOUS MYOGENIC CONTRACTION. J MECH MED BIOL 2017. [DOI: 10.1142/s0219519417400322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aortic media realized Windkessel vessel functions and maintain sustained ventricle ejection balance during cardiac circle. Wheatstone bridge circuit piezoresistive strain sensor had desirable sensing properties to investigate aortic cushion features. In this study, Wheatstone bridge sensor was used to evaluate quick stretching-induced aortic efficient cushions and spontaneous myogenic contractions. Mice aortic specimens were loosely hooked and stabilized to [Formula: see text][Formula: see text]mm stainless steel pin and strain sensor, whereas the other side was hooked and shows increasing specimen length. Specimen isometric tension and rhythmic spontaneous myogenic contraction were recorded. Isometric tension and spontaneous myogenic response at initial length ([Formula: see text] and ultimate length ([Formula: see text] were evaluated. Aortic specimen significantly eliminated mechanical rigid oscillations. The recovery to baseline time was significantly shortened at [Formula: see text] ([Formula: see text][Formula: see text]ms and [Formula: see text] ms at [Formula: see text] and [Formula: see text], respectively, but [Formula: see text][Formula: see text]ms and [Formula: see text][Formula: see text]ms in no-load test). High Ca[Formula: see text] incubation prolonged the recovery time to baseline at [Formula: see text] and [Formula: see text] ([Formula: see text][Formula: see text]ms and [Formula: see text][Formula: see text]ms, respectively) and suggested Ca[Formula: see text] decreased efficient cushion. Moreover, strain sensor successfully recorded the enhanced rhythmic spontaneous myogenic contractions in isometric specimen. Wheatstone bridge circuit sensor reflected the significance of efficient cushions under mechanical preload, which absolutely captured rhythmic myogenic contractions of mice aortic specimen.
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Affiliation(s)
- WENJING DING
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - YANG WANG
- Department of Medical Physiology, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - GUOJUN LI
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - JIAJI HANG
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - YONGCHANG WU
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - CHENHAO LING
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - DANYE ZHOU
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - ZHIBIN CHEN
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
| | - LINGFENG GAO
- Clinical Medicine College, Hai Nan Medical College, No. 3 Cheng Xi Xue Yuan Road, Long Hua District, Hai Kou City, Hai Nan Province 571199, P. R. China
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