Looks good Jim, others with more medical background have picked at it already.

I might change the slider ziplock for a regular one- the sliders suck in my experience and just can't be made liquid tight.

Sharpie or a similiar marker. Log data on their forehead or forearm- can't lose your notes without misplacing the patient. :P

Cut down the handle of the razor.

Get yourself about a meter and half or two meters of red or fluorescent colored, 25 to 40mm webbing (flat or tubular) and some buckles, to replace the strap of the pouch. Versatile.