Monitoring patient vitals in a clinical environment has traditionally been a job for expensive and heavily calibrated systems requiring patients to be tethered to bedside monitors. Wireless patient monitoring systems provide for both patient comfort and clinical convenience, provided they can still be made to operate within strict medical standards.
In the case of wearable temperature monitors, there are many design tradeoffs that must be considered for power consumption, size, system performance (in terms of both RF and accuracy), and patient comfort. Thinner flexible batteries provide greater comfort but may require more careful power management. Smaller, lower cost, designs suffer in terms of thermal isolation and RF performance. Optimal solutions for long term monitoring must make good use of board area to improve accuracy and signal integrity, while trying to keep current consumption as low as possible. System designers will have to balance these requirements alongside the comfort and experience of the patient.