They are.
If you look at the TABLE 7–26: TECHNOLOGICAL ITEMS on page 219 of the CRB, both items have a capacity of 1 and usage of 1.
And here is how those two work, from page 218:
Capacity: This lists the maximum capacity for an item that requires charges to function.
Usage: This entry lists how many charges are consumed when the item is used.
It's the same mechanic for all technological items (although the use of the word Charge is wonky). You don't need to succeed in order to consume their usage.
Their descriptions also go along the same lines. From page 220:
Medpatch
A medpatch is a simple, all-in-one,
disposable medical device designed to be
slapped onto a wound or area of concern
(such as a clearly diseased or poisoned section
of the body) with little skill required. A medpatch allows you to
attempt a Medicine check untrained with a +10 circumstance
bonus, but only for the first aid, long-term stability, treat
disease, and treat drugs or poison tasks.
Sprayflesh
Sprayflesh is an advanced biotech medical device that sprays
neutral biomass into a wound or area of concern (such as a
clearly diseased or poisoned section of the body). If you have
ranks in Medicine, a dose of sprayflesh allows you to attempt
a check to treat deadly wounds on a creature that has already
received its limit of treat deadly wound benefits for the day.
If you succeed at a DC 25 Medicine check, the next time such
a creature rests for 10 minutes and spends a Resolve Point to
regain Stamina Points, it can instead gain the benefit of your
Medicine check to treat deadly wounds. If you are not trained
in Medicine, a dose of sprayflesh acts as a medpatch.