Medical

Electric Patch Holds Promise for Treating PTSD

An average of 30 years had passed since the traumatic events that had left them depressed, anxious, irritable, hypervigilant, unable to sleep well and prone to nightmares. But for 12 people who were involved in a UCLA-led study — survivors of rape, car accidents, domestic abuse and other traumas — an unobtrusive patch on the forehead provided considerable relief from post-traumatic stress disorder.TNS harnesses current from a 9-volt battery to power a patch that sends a low-level current to cranial nerves that run through the forehead. (Reed Hutchinson/UCLA)

Posted in: News, Aerospace, Defense, Medical, Patient Monitoring

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Blast-Induced Acceleration in a Shock Tube

High-fidelity simulation of blast flow conditions can aid in developing strategies to mitigate blast-induced brain injury.Army Medical Research and Materiel Command, Fort Detrick, MarylandThe prevalence of blast-induced traumatic brain injury (bTBI) has prompted an urgent need to develop improved mitigation strategies and advance medical care targeting casualties with bTBI. Despite considerable effort, the basic mechanisms of blast-induced brain injury are still undefined. Based largely upon computational modeling, several candidate mechanisms of nonimpact bTBI have been identified and include head acceleration. This work hypothesizes that explosion flow conditions can cause head acceleration sufficient to injure the brain, and that these inertial forces combine with other injury mechanisms to yield bTBI.

Posted in: Briefs, Aerospace, Defense, Medical

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Wireless Sensor Enables Study of Traumatic Brain Injuries

A new system that uses a wireless implant has been shown to record – for the first time – how brain tissue deforms when subjected to the kind of shock that causes blast-induced trauma commonly seen in combat veterans.Purdue professors Riyi Shi (left) and Babak Ziaie led research to develop a new system that records how brain tissue deforms when subjected to the kind of shock that causes blast-induced trauma. (Purdue University image/Kevin Doerr)

Posted in: News, Aerospace, Defense, Medical, Research Lab, Data Acquisition, Sensors

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MIT Provides Yeast a Different Environment for Ethanol Tolerance

Ethanol and other alcohols can disrupt yeast cell membranes, eventually killing the cells. In research funded by the MIT Energy Initiative and the U.S. Department of Energy, researchers at MIT and the Whitehead Institute for Biomedical Research found that adding potassium and hydroxide ions to the medium in which yeast grow can help cells compensate for that membrane damage. Read more at http://articles.sae.org/13609.

Posted in: Articles, DTB, News, Aerospace, Defense, Energy, Medical

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Wireless Vital Signs Monitor for Trauma Patients

This monitor enables users to triage, prioritize transport, and track changes in numerous casualties from a remote location. A miniature, portable wireless vital signs monitor (MWVSM), called Mini-medic™, could aid in the triage and diagnosis of trauma patients with and without traumatic brain injury (TBI). The MWVSM consists of two components, both of which are the approximate size and weight of a cellphone: one is a sensor that is placed either on the forehead or the fingertip of a patient, and the other is a monitor that receives a wireless signal transmitted up to 100 m carried by the medic.

Posted in: Briefs, Aerospace, Defense, Medical, Sensors and actuators, Medical, health, and wellness, Head injuries

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Effect of Acceleration Frequency on Spatial Orientation Mechanisms

This technology could help desensitize individuals to motion sickness caused by aircraft, vehicle, and ship movements. Extreme motion environments can induce loss of visual acuity, motion sickness, and spatial disorientation. Understanding how human sensory integration of acceleration stimuli affects spatial awareness will improve models of spatial disorientation and mishap analysis. While there are numerous studies describing vestibular semicircular canal responses to angular acceleration, less is known about vestibular otolith responses to linear acceleration. This gap in knowledge is important to resolve, since seasickness and airsickness are highly dependent on the predominant frequency of a linear acceleration stimulus.

Posted in: Briefs, TSP, Medical

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Precision Targeting with a Tracking Adaptive Optics Scanning Laser Ophthalmoscope

This dual-imaging system could enable selective destruction of diseased cells during the progression of retinal diseases. Adaptive optics (AO) has become increasingly utilized in research ophthalmic diagnostic instruments since their first use nearly ten years ago. Integration of adaptive optics in scanning laser ophthalmoscopy (SLO) is a flying-spot technique whereby scattered light in images is blocked by placement of an aperture at a back conjugate focal plane. Adaptive optics systems sense perturbations in the detected wavefront and apply corrections to an optical element that flattens the wavefront and allows near diffraction-limited focus.

Posted in: Briefs, Medical

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