One story that sticks in my mind is hearing from a doctor in a primary care hospital in Yucatan. They do not have the equipment to conduct ulatrasounds on pregnant women, so they must send the women to a larger hospital.
Now, although a fetal heart rate monitor does not provide all of the capability of an ultrasound, considering that the fetal heart rate is an indictator of fetal stress, the metric can provide information for rural health workers, clinics and even hospitals lacking equipment, so that they can make informed decisions about when a woman needs to seek more advanced care.
Besides the rugged and simple to use nature of the Freeplay Fetal Heart Monitor, the device can be powered by winding the handle. Each minute of winding the device results in 10 minutes of monitoring time. When grid power is available, the batteries can be charged and will provide continuous power for several hours.
Freeplay and Powerfree Education & Technology have partnered to develop and test a wide range of medical technologies for use in low-resource settings, all of which are power-free.