All of the images are from the same 75 nm NPN four-channel chip. The first images shows the edges from the backside of the chip, showing how flat it is (without the oxynitride present on the top side). There is a crackle-like texture but the third image, which shows the corner of the membrane and…
SEM of lot # 1208, four-slot 75-nm NPN at 1014x, 1972x, 4101, and 5351x mag. The next image is with a tilted sample. (from the same lot of chips #1208 4-slot 5.4 mm chips) The next five show the edge from the top side. I think the second image is the best of the bunch….
(This post is not finished, but my flight keeps getting delayed in 20 minute increments, so better to publish it unfinished than to not get it up before NRG in case I’m not able to make it. Please forgive typos etc.) I attended a meeting organized by the Kidney Health Initiative, a collaboration between the…
There are two longitudinal studies for Chronic Kidney Disease (CKD). Ancillary studies can be set up to share the collected data, bio samples, or even request additional data to be collected. These Ancillary studies can be funded through normal channels, NIDDK, ASN, VA, etc. Approval to use the data should be requested 3-4 months before…
While the latest small animal studies was meant to be a test of the new 1-chip bonded HD devices, device failure resulted in the use of the older 2-chip 10-channel HD devices as used on previous experiments. Here is all the data, Sham, commercial, 75 nm NPN trial 1 and trial 2. Trial 1 had…
Power and battery life for wearable hemodialysis. The pump(s) will consume the most energy of all the components of the system. Other power consumers could include, control circuits, wireless communication, display and warning lights, depending on design. A continuous display could consume a great deal of power if not handled correctly. LEDs and LCD indicators…
“Three ways to build an artificial kidney” This IEEE Spectrum article list three efforts to make an artificial Kidney. The first is the AWAK, kidney on a belt. They don’t have the latest images for this, only the original very bulky design. The second is the Roy/Fissell implantable Renal Assist Device (iRAD). Both of these…
ASAIO /əˈsī ō/ noun American Society of Artificial Internal Organs. There is an associated Journal, “ASAIO Journal”, and a yearly conference for the presentation and discussion of research relating to advances in medical device technology. While the initial focus of the society was on renal devices, the artificial kidney, currently the majority of work by…
To image the blood side (in-channel) side of the membranes, I transferred the membranes of a HD chip onto another wafer segment (SiN wafer: 4534) The transfer wasn’t clean but I got some good images. These membranes were exposed to blood flow for 4 hours in a typical rat HD setup. Post experiment, the membranes…
I attempted to clear the large format lift-off devices (from Josh). I was unable to clear, in a reasonable amount of time (< 2 hours) by pumping IPA. So I switched to PBS then Blood and blue-dyed PBS (dye is estimated to be between 10 nm and 500 nm, obviously the amount of dye near…