1) Differentiate: Must be able to differentiate between the Hemostatic Agent, the Antiseptic & Anesthetic, and the Thermoregulator to maintain specified order for therapeutic treatment and be fast acting.

2) Controlled Pressure: Must be able to apply the therapeutic agents at pressures between 10-15psi to not produce indirect damage onto the skin.

• The skin can withstand pressures of up to 50 psi at a sudden impact

3) Instructions: Must provide the user with a convenient way to follow set of instructions to spray the three solutions using a color-coded 1, 2, & 3 step system. This will serve the purpose of allowing the user to follow a proper methodology to treat the wound.

4) Single Hand Use: The device can be used single handedly to treat any side of the body.

• There are no cables or external sources needed to power or employ the device.
• Rubber Grip for design to provide a firm grip under virtually all-spraying conditions.
• Weight distribution: The handle will contain most of the weight for better support

5) Disposable Cartridges: Designed to have disposable cartridges for each solution. Each solution has a one-time use. The design also includes a reset button for SprAid to initialize back at step 1 (hemostatic solution).

• Capacity of cartridges: 3 (Hemostatic Agent, Antiseptic & Anesthetic, and Thermoregulator)
• Working slots for placement and/or extraction of cartridges

6) Trigger Lever: Designed to activate the fluid pump in order to release the therapeutic agents from the barrel of the spray head into the spray nozzle.

• Trigger Type: Smooth rubber lining

7) Fiber Optic Sight: Lighting tubes to display a visible dot at the end of the fiber optic piece.

• Optical assistance to help the user spray the therapeutic agents in close or open environment.
• White fiber optic light able to point with precision from a distance of 1 foot from the site of injury.
• The fiber optic light will enable the user to maximize the visual field of the wound in order provide sufficient clarity during the spraying of the therapeutic agents.

8) Anticlotting Mechanism: The Antiseptic agent, which contains the isopropyl alcohol, serves a double purpose to rinse out the tube lines to prevent the backup of fluid.

• The three port manifold system allows the user to switch back to the antiseptic agent to disinfect and flush out the inner channels.

9) Spray Nozzle Settings: The nozzle contains three settings, on/off, coarse spray, and fine spray.

• The mechanism of switching between settings by rotating the cap clockwise or counterclockwise allows the user to spray larger or smaller areas as needed. In addition, the off mechanism prevents leakage or backup of fluid from spraying prematurely.

10) Treat Superficial Wounds: The device employees a series of therapeutic agents in unison with a three-port manifold spray system to treat superficial wounds at the site of injury.

• The main function of the device is to be used in clinical, outdoor and residential areas by making the frame material of the device resistant to temperature changes, durable, light weight, portable, low cost, non-toxic, and non-allergenic.

There are also some potential constrains that will need to be overcome to achieve a system that is durable, portable and cost efficient such as:

1. Durable and low weight:
   • The device must be made of a light material to allow for portability. While some inner components of the gun will be made out of metal and remaining parts would ideally be made out of plastic.  Making the device light will be crucial to allow the user to operate SprAid with a single hand.
2. Compact Size:
   • The spray gun device must also be made into a compact size for portability, ease of use, and storage. The inner widgets inside the device will need to be selected based on a size constrain to keep the device at a manageable weight and frame.
     • Frame: Compac
     • Weight: between 0.5 lbs. and 1.44 lbs
     • Width: between 1” and 1.5″
     • Height: between 4” and 5″
     • Length:  between 5.5” and 7.5”
     • Barrel Length: between 2” and 2.5”
     • Finish: Plastic
3. Reliable:
   • It will be necessary to design the system in a manner that it will prevent jamming when transitioning from one solution to another.
     1. Cartridges can be extracted easily by pulling out the barrel.
     2. The device contains a reset system that provides instant-ready spraying in case the barrel doesn’t transition to the next cartridge.
4.  Maintenance:
   • The design must take into account that the solution could create build up in the tubing so it will be necessary to create a protocol or system to clean the device.
     1. Triggering a saline-free solution can clean the pipelines of the device. This saline-free cartridge is to be inserted in the first slot instead of the hemostatic agent and then the system can be resetted.
5. Price constrains:
   • The device is designed to be affordable so that it can be implemented as a universal component of a first aid kit. The cost for making the prototype of SprAid is projected to be higher until it can be mass-produced. The cost for the parts will be a key determinant in choosing the components of the spray gun.
     1. Cost of production for the initial spraying apparatus should be less than $300, which will include trying out different parts for optimization.
     2. Aimed cost of a reproducible prototype should be less than $100 dollars