Since I have emphysema, vaping with liquid would actually be dangerous for me. It could result in an accumulation of fluid in my lungs, whereby, the possibility of pneumonia

would be greatly increase. Thanks for your feedback.
Scrapper, there is the same eliquid in those cartridges that is used in other, more advanced devices. No e-cigarette will work without e-liquid--they all use a mixture of PG/VG/nicotine and flavoring.
If you're worried about your emphysema:
Have you considered other ways of getting your nic fix? Swedish snus is the best and the safest--it's been studied for ever. If you can't get Swedish snus locally, American snus will do, but it's not as good. Using snus is best for ailing lungs, of course, because there's no inhalation involved--you just park a small pouch of purified tobacco under your lip and you're done.
I'm not a pulmonologist so I can't tell you if vaping is safe for people with COPD/emphysema, but one study conducted by Dr. Polosa from Italy seems to be encouraging:
Dr. Polosa, Italian vapor and tobacco expert, reviews e-cigs in BMC Medicine - American Council on Science and Health (ACSH)
"Among people with asthma and/or COPD (chronic obstructive lung disease, bronchitis and emphysema), improvement in symptoms was noted in two-thirds of smokers who switched to vaping. According to Dr. Polosa, taken together, these findings provide emerging evidence that e-cig/vapor product use can reverse harm from tobacco smoking."
You may also want to read this post by Smokey Joe, the founder of this forum:
My emphysema and vaping. Attention dual users. | Page 2 | E-Cigarette Forum
If you decide that you want to vape, talk to your doctor--show him the study, and give it a try. But be smart about it and vape defensively. Here's what I would suggest:
1) Don't inhale. You can vape and get your nicotine without inhaling--vape like you would smoke a cigar or a pipe. I do it often to give my lungs a break. It's fun.
2) If you must inhale, avoid flavored eliquids--stick to unflavored base (just PG, VG and nicotine, I like 70/30 PG/VG ratio) or choose very lightly flavored, clean, clear eliquids--menthol is the cleanest of all flavorings.
3) Vape at low wattages and use mouth to lung vaping technique--avoid high wattage/sub ohm cloud chasing.
Good luck!