Humidity-Sensing Mattress for Long-Term Bedridden Patients with Incontinence-Associated Dermatitis

Jinpitcha Mamom; Phadungsak Ratanadecho; Chatchai Mingmalairak; Bunyong Rungroungdouyboon

doi:10.3390/mi14061178

Humidity-Sensing Mattress for Long-Term Bedridden Patients with Incontinence-Associated Dermatitis

Micromachines (Basel). 2023 May 31;14(6):1178. doi: 10.3390/mi14061178.

Authors

Jinpitcha Mamom¹, Phadungsak Ratanadecho², Chatchai Mingmalairak³, Bunyong Rungroungdouyboon⁴

Affiliations

¹ Department of Adult Nursing and the Aged, Faculty of Nursing, Thammasat University, Pathum Thani 12121, Thailand.
² Center of Excellence in Electromagnetic Energy Utilization in Engineering, Department of Mechanical Engineering, Faculty of Engineering, Thammasat University, Pathum Thani 12120, Thailand.
³ Department of Surgery, Faculty of Medicine, Thammasat University, Pathum Thani 12120, Thailand.
⁴ Center of Excellence in Creative Engineering Design and Development, Faculty of Engineering, Thammasat University, Pathum Thani 12121, Thailand.

Abstract

Designing new medical devices with advanced humidity sensors is of great significance for patients with incontinence-associated dermatitis (IAD). The primary goal of this study is to test the humidity-sensing mattress system for patients with IAD in clinical settings. The design of the mattress is set at 203 cm, with 10 × 3 sensors, dimensions of 19 × 32 cm, and a weighted bearing of 200 kg. The main sensors consist of a humidity-sensing film, a thin-film electrode (6 × 0.1 mm), and a glass substrate (500 nm). The sensitivity of the test mattress system showed that the resistance-humidity sensor was at a temperature of 35 °C (V0 = 30 V, V0 = 350 mV), with slope at 1.13 V/fF, f = 1 MHz, 20-90% RH, and a response time of 20 s at 2 μm. In addition, the humidity sensor reached 90% RH, with a response time of less than 10 s, a magnitude of 107-104 Ω, 1 mol%, CrO1.5, and FO1.5, respectively. This design is not only a simple, low-cost medical sensing device, but also opens a new pathway for developing humidity-sensing mattresses in the field of flexible sensors, wearable medical diagnostic devices, and health detection.

Keywords: bedridden patients; humidity sensors; incontinence-associated dermatitis; mattress design.

Grants and funding

This work (Grant No. RGNS 65–104) was financially supported by the Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation.