Somna

PRODUCT DESIGN, UI/UX DESIGN

Somna is a wearable device and an app that track Sleep Apnea.

Pratt Institute Senior Design Studio Project

Sensor Prototypes

A modified blood oximeter allows for blood oxygen readings to happen at the base of the finger, rather than the end. This location can be utilized to make a more comfortable device.

Preferred Placement Survey

Users were asked “Of the following areas, which would you prefer for placement of a wearable device worn during sleep?”

WEARABLE PROTOTYPING

Design Requirements: The wearable is worn on the wrist, houses the electronics, must be comfortable to sleep in, and work for multiple hand and wrist sizes.

Would you wear this to bed?

A large majority of subjects expressed that they would be willing to wear this device to bed, and that it was not obtrusive or uncomfortable.

How comfortable is it?

Subjects stated that device was comfortable, but it the hardware could be smaller, it would be more comfortable.

Did they intuitively understand the placement of the garment?

Less than half of subjects successfully understood the orientation of the garment without instruction. Future packaging should include a diagram for placement. Alternative placements would not hinder the sensor functionality.

Could they put it on easily?

Older subjects struggled with dexterity to attach the finger Velcro. Further iterations should include a track for the finger Velcro to make it easier to attach, similar to the wrist.

Pattern Development

Hardware and Wiring

The PCB, battery, and other hardware are housed on the wrist. Only the heart rate and blood oxygen sensors are located on the finger. Wiring runs up through the finger attachment to connect these sensors to the battery and board. All wiring and hardware is embedded in fabric for comfort.

Sizing

The pattern can be adjusted in two places to create small and large sizes.