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Interleukin-23 (IL-23) and CD4(+) T helper 17 (Th17) cells are thought to be critical in psoriasis pathogenesis. Here, we report that IL-23 predominantly stimulated dermal γδ T cells to produce IL-17 that led to disease progression. Dermal γδ T cells constitutively expressed the IL-23 receptor (IL-23R) and transcriptional factor RORγt. IL-17 production from… (More)
Onboard assessment of photoplethysmogram (PPG) quality could reduce unnecessary data transmission on battery-powered wireless pulse oximeters and improve the viability of the electronic patient records to which these data are stored. These algorithms show promise to increase the intelligence level of former "dumb" medical devices: devices that acquire and… (More)
A 1.8 W RF output power at 10 GHz and 60 % power conversion efficiency (PCE) at 6 GHz have been achieved using a modified uni-traveling-carrier photodiode flip-chip bonded on diamond.
Pulse oximeters are central to the move toward wearable health monitoring devices and medical electronics either hosted by, e.g., smart phones or physically embedded in their design. This paper presents a small, low-cost pulse oximeter design appropriate for wearable and surface-based applications that also produces quality, unfiltered photo-plethysmograms… (More)
Most pulse oximeters determine blood oxygen saturation (SpO(2)) after calculating a coefficient, R, that represents the normalized ratiometric contributions of the pulsatile red and near-infrared photoplethysmograms (PPGs) acquired by the sensor. This paper presents a new approach that uses principle component analysis (PCA) to separate the signal and noise… (More)
There is mounting evidence to suggest that T-cell-mediated suppression of haemopoiesis is a pathogenetic mechanism in three bone marrow failure syndromes: aplastic anaemia (AA), paroxysmal nocturnal haemoglobinuria (PNH) and myelodysplasia (MDS). T-cell microclones can be detected by sensitive polymerase chain reaction (PCR)-based methods in all three… (More)
Modified uni-travelling-carrier (MUTC) photodiodes (PDs) with microwave open and shorted stubs having RF output power (P<sub>RF_out</sub>) of 23 dBm and 21.6 dBm, respectively, at 20 GHz are demonstrated.
Pulse wave velocity (PWV) has garnered attention as a means to estimate vessel elasticity. This paper presents an approach to measure PWV using two synchronized, wireless pulse oximeters placed on the wrist and fingertip of the same hand. A MATLAB interface acquires and time-aligns these incoming photoplethysmograms (PPGs), and then it calculates PWVs using… (More)
Accidental slips and falls due to decreased strength and stability are a concern for the elderly. A method to detect and ideally predict these falls can reduce their occurrence and allow these individuals to regain a degree of independence. This paper presents the design and assessment of a wireless, wearable device that continuously samples accelerometer… (More)
HA and bone morphogenetic protein-2 (BMP-2) possess superior osteoinductive and osteoconductive activities in the repair of bone defects. In this study, a BMP-2 mimicking oligopeptide (serine-serine-valine-proline-threonine, SSVPT) was introduced to the surface of nano-sized HA as the reinforcement phase of a poly(methyl methacrylate) (PMMA) cement, and the… (More)