A long-range UHF RF identification (RFID) sensor has been designed using a 0.35-µm CMOS standard process. The power-optimized tag, combined with the ultralow-power temperature sensor, allows an ID and a temperature reading range of 2 m from a 2-W effective radiated power output power reader. The temperature sensor is based on a ring oscillator, where the temperature dependence of the oscillation frequency is used for thermal sensing. The temperature sensor exhibits a resolution of 0.035 • C and an inaccuracy value lower than 0.1 • C in the range from 35 • C to 45 • C after two-point calibration. The average power consumption of the temperature sensor is only 110 nW at ten conversions per second while keeping a high resolution and accuracy. These properties allow the use of the RFID as a batteryless sensor in a wireless human body temperature monitoring system. Index Terms-CMOS analog front end, digital core, high accuracy, low power, RF identification (RFID), temperature sensor, ultrahigh frequency (UHF).

Background/Aims: Interpretation of the results of earlier meta-analyses in chronic kidney disease (CKD) patients on the impact of anaemia treatment with erythropoiesis-stimulating agents (ESAs) on clinical outcomes has been hampered by the inclusion of small trials and trials of short duration. We re-evaluated the benefits and harms of treating anaemia, including only relevant clinical trials. Methods: We conducteda systematic review and meta-analysis of randomised controlled trials performed in adults with CKD which allocated patients to different doses of ESAs, and we compared the effect of these interventions on vascular access thrombosis, stroke, risk of end-stage renal disease (ESRD) and all-cause mortality. Additional inclusion criteria were studies with a duration of at least 1 year and enrolling more than 500 participants. Results: Five trials (7,902 participants) met the inclusion criteria and were included in the meta-analysis. The number of patients enrolled in each trial ranged from 596 to 4,038. The mean/median duration of follow-up ranged from 14 to 36 months. A higher haemoglobin target was associated with increased risk of vascular access thrombosis (RR 1.343; 95% CI 1.162–1.554; p = 0.0005) and stroke (RR 1.735; 95% CI 1.323–2.275; p = 0.0005), and no effect on risk of ESRD (RR 1.089; 95% CI 0.986–1.203; p = 0.094) or all-cause mortality (RR 1.148; 95% CI 0.977–1.350; p = 0.093). Conclusion: In CKD patients, treatment of anaemia with ESAs targeting a higher haemoglobin value does not lower mortality or reduce the risk of ESRD, and may increase cardiovascular risk.

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