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May 20, 2021 9 tweets 6 min read Read on X
[1/n] 10 days ago we first shared blueprint of O2 conservation devices in context of #OxygenShortage; today we are releasing "Anmo2l" (means priceless in Hindi) - a ready to scale open design capable of saving 50-70% oxygen during O2 therapy. See anmo2l.org details.
[2/n] The surge of COVID-19 cases in India and around the world has resulted in an acute oxygen shortage. We describe a simple, open source, and rapidly manufacturable conservation device for use with dual port nasal cannulas saving oxygen supply by almost two or three times.
[3/n] We are looking for partners/manufacturers across world to help bring this to patients. If you have experience in local regulatory processes, we want to support you to bring this rapidly to communities suffering with O2 shortage including India/Nepal, Latin America, Africa.
[4/n] Current estimates put the O2 demand in India at 15.8 million cubic meters or 2.2 million O2 cylinders per day. O2 delivered during patient exhalation is mostly vented to air & wasted, providing opportunity for O2 conservation by shutting flow when the patient is exhaling.
[5/n] This has been intense 10 days.. but we are ready to start large scale clinical validation. We are looking for partner clinical groups in India/Nepal/Africa/Latin-America to grow the current clinical team - we intend to collect extensive validation data prior to approval.
[6/n] The current design keeps the current supply chain in mind; with alternative components accessible for all key components. In larger scale, we believe we can bring cost per unit to be lower than ~$50. The device also has "fail-open" in case of loss of power.
[7/n] It has been an incredible last 10 days - to go from idea to product - led by @hongquan_li @deepak_me90 @anesta_k @lietk12 in the lab - & incredible support from @mlipnick David Gaba, Ruth Fanning & clinicians & engineering team @IndiaCOVIDSOS & more anmo2l.org/team
[8/n] We still need a lot of support to get this to the last mile - if you are interested in helping us scale this to all corners of the world; please do reach out. We can use all the help.. anmo2l.org/support
[9/n] For folks looking for technical details - here is a PDF file we have posted to MedRxiv: anmo2l.org/documents/medr… Once it is available online, will share the MedRxiv link.

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More from @PrakashLab

Jan 3, 2022
(1/n)Ever wondered how cells with intricate architecture survive "mechanical gymnastics" they seamlessly perform in living world - mind-bending extreme movements. Story features entangled organelles (ER), energy dissipation & discovery of "topological damping" inside a giant cell
(2/n) In latest lab preprint - we share an unusual discovery of “topological metamaterial” we found in a giant cell & unique mechanical role for endoplasmic reticulum (ER) + vacuoles entangled together to dissipate energy during ultrafast motility. biorxiv.org/content/10.110…
(3/n) This story was led by an incredible graduate student @RayChang0612 & his insatiable curiosity to dig deeper. We thought about the question of dissipation in many different ways - & finally settled on looking at extremes to understand envelope of what life permits and why?
Read 20 tweets
Jul 31, 2021
(1/n) Can we build "perceptive" machines from mechanical parts? How "intelligent" were animals prior to evolution of nervous system? When does a collection of cells really become an organism? How can animal without muscles or neurons coordinate activity across millions of cells? ImageImage
(2/n) With an incredibly amazing graduate student in my lab - Matt Storm Bull - we went on a quest that almost lasted 7 years. This is a multi-scale story in 3 parts (arXiv ); subcellular, tissue and organism scale. What an amazing privilege to go on this expedition with you Matt Image
(3/n) (1)Excitable mechanics embodied in a walking cilium
arxiv.org/abs/2107.02930 (2) Ciliary flocking and emergent instabilities enable collective agility.. arxiv.org/abs/2107.02934 (3) Mobile defects .. shape the locomotive behavior of a headless animal arxiv.org/abs/2107.02940
Read 41 tweets
Apr 27, 2021
[1/n] "Oxygen" - If you know anyone in India - it's one word you hear over & over. It's a critical life saving supply. In context of COVID surge in India, we are sharing open source design for "pulse dose" O2 conservation device - potential to save 50% O2. Not medical device yet.
[2/n] The idea "pulse dose system" is simple. When you exhale, you don't take in O2 while the tank still delivers. For mild COVID19 patients on nasal cannula - this O2 is wasted. A simple pressure based detection & an electronic valve can release O2 only during inhalation.
[3/n] The implementation above is simple - and not a medical device. A lot of work still needs to be done and tested clinically. We are releasing the design/implementation in open source - to engage manufacturing partners in an emergency. docs.google.com/document/d/1gN…
Read 9 tweets
Sep 5, 2020
(1/n)Excited to announce new course I have been planning for 5 years BioE271: Frugal Science frugalscience.org structured as global participatory class open to all. 50% Stanford students 50% global participant. Learn how to solve serious challenges with little bit of play
(2/n)Together we will explore principles of frugal science to design scalable solutions with cost/performance rubric. With examples we will look at imp of fundamental science of everyday building blocks. We will juggle rigors of applied math/physics with creativity of a toy maker
(3/n) Global Participatory Community Health Track:
Can we diagnose deadly infectious diseases under a tree? Environmental Planetary-Health Activists Track: Can we build tools to make measurements at planetary scale.
Read 10 tweets
Jul 20, 2020
(1/n) Excited to share #Pufferfish an open-source full-feature mechanical ventilator reference design capable of volume & pressure control with assist modes, both invasive/non-invasive ventilation & features necessary to support COVID19 patients pez-globo.org
(2/n) Pufferfish is a result of a large scale intl collaborative effort - Pez-Globo - between my lab @Stanford, @brownengin @FluidDanamics & @UofU_Anesthesia @kkuck - clinicians, engineers, scientists, industrial/manufacturing partners @BharatForgeLtd @Waymo @BlackrockMicro
(3/n) Heart of whole operation are students, postdocs, clinicians, innovators & volunteers - working with tenacity, precision & passion I have never witnessed before - too many to name individually (list pez-globo.org/core-team) - spreading across US, India, Nepal and Kenya
Read 18 tweets
Jul 3, 2020
(1/n) Excited to share Handyfuge-LAMP; a low-cost & electricity-free centrifugation for isothermal SARS-CoV-2 detection in saliva. With COVID19 cases increasing globally, diagnostics needs to be accessible to everyone - including resource limited regions medrxiv.org/content/10.110…
(2/n)This simple electricity-free LAMP protocol builds on fantastic work by Cepko lab at Harvard [medrxiv.org/content/10.110…], but with ahand powered centrifuge to make this assay completely electricity free for resource constrained settings. All you need is everything in this pic.
(3/n) If you would like to try it, here is the visual summary of every step of the way; with centrifugation steps linked below.
Read 10 tweets

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