| Inspiratory Resistance Maintains Arterial Pressure During Central Hypovolemia: Implications For Treatment Of Combat Casualties With Severe Hemorrhage |
01-Nov-2006 |
9 pages |
| Authors:
Anja Metzger; John B Holcomb; Victor A Convertino; Kathy L Ryan; Caroline A Richards; William H Cooke; Ahamed H Idris; Keith G Lurie; Bruce D Adams; ARMY INST OF SURGICAL RESEARCH FORT SAM HOUSTON TX
|
 | Loss of consciousness due to central hypovolemia can occur due to sudden cardiovascular decompensation in normal individuals or hypovolemic shock in wounded patients. A variety of devices have been developed to sustain perfusion to the brain including anti-G suits worn by pilots and returning astronauts and applied to patients as shock trousers. However, all countermeasures developed to date suffer from problems that limit their utility in the field. An impedance ... |
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| Operational Medical Issues in Hypo-and Hyperbaric Conditions (les Questions medicales a caractere oprationel liees aux conditions hypobares ou hyperbares) |
JUN 2001 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
 | On 16-19 October 2000, NATO, Partnership for Peace (PfP) and Non-NATO nationals from 24 countries met in Toronto, Canada to attend a symposium on Operational Medical Issues in Hypo- and Hyperbaric Conditions relevant to the alliance, arranged by NATO/RTO/HFM. Exposures to the said conditions are experienced regularly in military operations, but this was the first time operational medical issues affecting air, sea and land forces were addressed in a NATO ... |
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| Models for Aircrew Safety Assessment: Uses, Limitations and Requirements(la Modelisation des conditions de securite des equipages: applications, limitations et cahiers des charges) |
AUG 1999 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| These proceedings include the Technical Evaluation Report, a tribute to Dr. Henning E. von Gierke, Director Emeritus, Wright-Patterson Air Force Ease (WPAFB), OH, three Keynote Addresses and 32 invited papers of a Specialists' Meeting sponsored by the NATO/RTO Human Factors and Medicine Panel. It was held at WPAFB from 26-28 October 1998. Significant advances have been made in modelling human physical and physiological responses to extreme ... |
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| Effect of G-Suit Protection on Carotid-Cardiac Baroreflex Function |
SEP 1998 |
18 pages |
| Authors:
Victor A. Convertino; Craig A. Reister; ROTHE DEVELOPMENT INC SAN ANTONIO TX
|
| To test the hypothesis that 0-suit inflation could increase cardiac chronotropic responses to baroreceptor stimulation and enhance baroreflex buffering of blood pressure, the carotid-cardiac baroreflex response of 12 subjects was measured across two levels of lower body negative pressure (LBNP = 0 and 50 mmHg) and two levels of 0-suit inflation (0 and 50 mmHg) in random order. Carotid-cardiac baroreflex stimulation was delivered via a ... |
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| Female Acceleration Tolerance Enhancement (FATE) Project |
APR 1998 |
17 pages |
| Authors:
James W. Dooley; Robert M. SHaffstall; Christopher M. Hearon; AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE
|
| To support the 1993 U.S. Secretary of Defense directive to open combat aircraft assignments to women, investigators of the Female Acceleration Tolerance Enhancement (FATE) Project determined female and male subjects' G- protective equipment fit and their tolerance/endurance to simulated aerial combat maneuvers (SACM). Methods: A study of female subjects previously conducted in our laboratory, employing a +4.5 to +7Gz SACM (4.5-7 SACM), indicated women ... |
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| Human Pulmonary Tolerance to Dynamic Over-Pressure |
NOV 96 |
64 pages |
| Authors:
Matthew B. Krebs; Andrew A. Pilmanis; ARMSTRONG LAB BROOKS AFB TX CREW SYSTEMS DIRECTORATE
|
| The literature was reviewed for animal and human data defining the limits of dynamic pulmonary overpressure. The physiology and basic theory of decompression are discussed. The current understanding of static pressure limits is discussed, and its basis in the literature identified. The maximum pressure that can be safely tolerated by the human pulmonary system in a dynamic over- pressure situation is unknown. This measurement, in general, has not been performed. ... |
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| Estimating Remaining Life in Biological Chemical Suits and Enclosure Materials. Phase 2. |
11 OCT 1995 |
79 pages |
| Authors:
Alan V. Bray; TEXAS RESEARCH INST INC AUSTIN
|
| The overall goal of this Phase II portion of this SBIR project was the development of a field NDI kit which uses optimized penetrant systems to detect defects in protective clothing materials - An adjunct goal was to investigate the feasibility of using penetrants to determine the extent of decontamination achieved. A classic penetrant approach to NDE of Teflon and similar protective clothing materials was developed. Penetrant development and testing, ... |
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| Cardiovascular Responses to Very Long Duration Positive Pressure Breathing |
MAR 95 |
|
| Authors:
W. D. Fraser; K. N. Ackles; DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
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| This study was undertaken to examine the effectiveness of the US Navy Enhanced Anti-G Lower Ensemble (EAGLE) and the US Air Force Advanced Tactical Anti-G System (ATAGS) enhanced coverage G-suits in providing protection against the adverse effects of positive pressure breathing and to establish the physiological duration limits of high levels of PPB. Six experienced subjects, wearing ATAGS and EAGLE G-suits and counter pressure chest jerkins, were exposed to counterbalanced ... |
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| Human Morphometrics, Motion, and Performance Research |
JUN 94 |
354 pages |
| Authors:
Bruce Bradtmiller; Sherri Upchurch-Blackwell; Henry W. Case; Thomas D. Churchhill; Daniel N. Mountjoy; ANTHROPOLOGY RESEARCH PROJECT INC YELLOW SPRINGS OH
|
| This report is the last in a series of 14 quarterly progress reports under Air Force Contract F33615-89-C-0572. Over the course of the three-and-a- half year contract period, the work was focused on a wide variety of tasks which were all united by a common theme: the application of one-, two-, and three- dimensional anthropometric data to problems of design and personal protection. The tasks that were active during the ... |
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| Effects of Weight Lifting on Intrathoracic Presures Generated by Anti-G Straining Maneuvers |
1994 |
19 pages |
| Authors:
L. G. Meyer; J. D. Grissett; J. G. Lamberth; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| The purpose of this study was to assess the effects of physical fitness program on the ability to perform an anti-G straining maneuver (AGSM). We used mouth-generated intrathoracic pressure (IP) as an index of effectiveness of the AGSM. We compared changes in IP in experimental subjects who performed the AGSM 5 times per week and participated in a weight lifting exercise program to IPs in control subjects who performed the ... |
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| Comparative Centrifuge Evaluation of the Air Force Advanced Technology Anti-G Suit (ATAGS) and the Navy Enhanced Anti-G Lower Ensemble (EAGLE) |
30 DEC 93 |
6 pages |
| Authors:
John W. Burns; Ronald C. Hill; ARMSTRONG LAB BROOKS AFB TX CREW SYSTEMS DIRECTORATE
|
| The centrifuge evaluation of the ATAGS and EAGLE was undertaken to determine which extended coverage anti-G suit would enter engineering and manufacturing development for joint service use. Eight male centrifuge subjects were used, wearing either an ATAGS, with or without pressure socks, or an EAGLE. Pressure breathing during G (COMBAT EDGE) was used with all three combinations. The combinations were randomized to eliminate any order effect. The arms of all ... |
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| Aeromedical Issues Related to Positive Pressure Breathing for +Gz Protection |
DEC 93 |
13 pages |
| Authors:
Larry P. Krock; ARMSTRONG LAB BROOKS AFB TX
|
| Positive pressure breathing as a method to enhance aircrew tolerance for repeated and sustained high +G, exposures (PBG) was first considered many years ago. Use of Combined Advanced Technology Enhanced Design G Ensemble (COMBAT EDGE) as a G-protection measure increases overall tolerance to +Gz acceleration by reducing the fatigue associated with performing straining maneuvers during extended or repeated exposures to acceleration stress. Physiologically, PBG exerts its effects upon both the ... |
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| Procedures and Metrics for Anti-G Suit Evaluations |
NOV 93 |
5 pages |
| Authors:
Grady L. Ripley; Richardo Perez III; Daniel H. Bauer; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| The ATAGS (Advanced Technology Anti-G Suit) design process initially relied on comments made by human test subjects to subjectively evaluate the effects of design changes on inflation characteristics. A standardized test method was needed to objectively quantify the effects of the design changes and also to compare the inflation characteristics of other anti-G suits. Therefore, a test was designed to measure the filling characteristics of different anti-G suits fitted to ... |
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| Predictions of Human Tolerance to Heat Stress While Wearing Advanced Integrated Suit Concepts During Simulated Realistic Combat Scenarios |
15 OCT 93 |
84 pages |
| Authors:
Barry S. Shender; NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA AIR VEHICLE AND CREW SYST EMS TECHNOLOGY DEPT
|
| Aircrew garment ensembles with increased body surface coverage designed to enhance G-tolerance were modelled to determine their effects on thermal loading during simulated realistic combat Scenarios. Heat stress is known to decrease G-tolerance. Physiologic responses were estimated using the Texas Human Thermal Model (THTM). Predictions included rectal and mean skin temperatures, heart rate, sweat rate and accumulated sweat (SWT) during an 'alert 5' with aerial combat maneuvers and normal operations ... |
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| Aircrew/Groundcrew Life Support Systems Research. Volume 2. CLIN 0002 Task Order Requirements |
JUL 93 |
45 pages |
| Authors:
James T. Webb; Robert W. Krutz Jr; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| USAF Contract F33615-89-C-0603 (SOW Section 3.3; CLIN 0002) with KRUG Life Sciences, Incorporated, San Antonio Division, supported the Armstrong Laboratory by providing for research in the form of professional and technical personnel, resources, and when required, facilities necessary to accomplish task orders for research, development, test, and evaluation (RDT&E) to include, but not be limited to, the following topics: Chemical defense, experimental aeromedical and casualty care equipment laboratory support, biochemical ... |
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| Aircrew/Groundcrew Life Support Systems Research. Volume 1: CLIN 0001 Research Requirements |
JUL 93 |
50 pages |
| Authors:
Robert W. Krutz Jr.; James T. Webb; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| USAF Contract F33615-89-C-0603 (SOW Section 3.2; CLIN 0001) with KRUG Life Sciences, Incorporated, San Antonio Division, supported the Armstrong Laboratory by providing for research in the following areas: human research subjects, experimental life support equipment development laboratory, anti-G suit research, development, test, and evaluation (RDT&E), research databases, subatmospheric research, molecular sieve technology, centrifuge testing of life support equipment, centrifuge support, cockpit integration and crew performance, and spatial disorientation research. This ... |
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| Emulation of Space Motion Sickness (SMS) on the Dynamic Environment Simulator Centrifuge |
JUN 93 |
41 pages |
| Authors:
Eric J. Martin; William B. Albery; SYSTEMS RESEARCH LABS INC DAYTON OH
|
| Adaptation of the vestibular system, specifically, the otolith organs to a non-terrestrial environment can result in space motion sickness- like symptoms when the human is re-introduced to the normal, 1G, terrestrial environment. This premise was investigated by exposing nine subjects to 90 minutes of sustained 2G acceleration in a human centrifuge and then observing and evaluating them at 1G. Five of the subjects developed slight SMS symptoms, three developed moderate, ... |
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| Motion and Spatial Disorientation Systems: Special Research Capabilities |
APR 1993 |
58 pages |
| Authors:
A. H. Rupert; R. E. Gadolin; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| The wide variety of unique devices together with the scientists and technicians who operate them have enabled the Naval Aerospace Medical Research Laboratory (NAMRL) to develop an international reputation as a center of excellence in vestibular research and the dynamics of spatial orientation, and for training outstanding scientists who are engaged in basic research worldwide. This document contains a brief description of the man-rated acceleration research facilities of the United ... |
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| Chronic Physiological Effects Of Positive Pressure Breathing In A High Sustained G Environment |
JAN 93 |
41 pages |
| Authors:
Lloyd D. Tripp Jr.; Steve Bolia; James Cooper; William B. Albery; Gary B. Marit; SYSTEMS RESEARCH LABS INC DAYTON OH
|
| A new Positive Pressure Breathing system for G protection (PBG) known as COMBAT EDGE, is currently being evaluated for both USAF and NAVY F-16 and F- 15 aircraft. This system is being used in conjunction with the current Air Force standard CSU-13B/P anti-G suit. Once this system is fully deployed, pilots can be exposed to a high time duration dose of positive pressure breathing over the course of a 20 ... |
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| Report of G-Protection Physiology Research Related to Extended Coverage G-Trousers with Pressure Breathing on Human Volunteers Under G-Loads on the Human Centrifuge at AL/CFTF, Brooks AFB, Texas |
1993 |
5 pages |
| Authors:
Ulf Balldin; NATIONAL DEFENCE RESEARCH ESTABLISHMENTSUNDBYBERG (SWEDEN) DIV OF AVIATION MEDICINE
|
| Report of G-Protection Physiology Research Related to Extended Coverage G-Trousers with Pressure Breathing on Human Volunteers Under G-Loads on the Human Centnfuge at AL/CFTF, Brooks AFB, Texas |
|
| Evaluation of the Retrograde Inflation Anti-G Suit (RIAGS) |
18 DEC 92 |
16 pages |
| Authors:
Lloyd D. Tripp Jr.; Kathy McCloskey; Daniel Repperger; Stephen E. Popper; Smith L. Johnston; SYSTEMS RESEARCH LABS INC DAYTON OH
|
| The Retrograde Inflation Anti-G Suit (RIAGS) was originally designed and fabricated in the early 1940's by Mr. David Clark and Dr. Earl Wood as The Progressive Arterial Occlusion Anti-g Suit. Testing of this suit on the Mayo Clinic centrifuge revealed that the suit provided more g protection than the fighter pilot of the era needed (+2.9 gz relaxed). This technology was revisited in 1987 by the Armstrong Laboratory and culminated ... |
|
| System Test Results of the Advanced Technology Anti-G Suit (ATAGS) |
NOV 92 |
10 pages |
| Authors:
Larry J. Meeker; John H. Olhausen; Grady L. Ripley; ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE
|
| Previous centrifuge and flight testing have shown that the ATAGS offers superior G endurance protection even when operated at lower pressures than the standard anti-G suit. All of the previous ATAGS testing was done, however, using human test subjects for the purpose of evaluating G protection. The purpose of the parametric tests was to provide basic system data such as volumes, fill rates and pressure differentials for the ATAGS. In ... |
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| An Evaluation of the Lower Coverage Anti-G Suit Without an Abdominal Bladder After Three Days of Seven Degree Head-Down Tilt |
SEP 92 |
6 pages |
| Authors:
Barbara J. Stegman; Robert W. Krutz Jr.; Russell R. Burton; Charles F. Sawin; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| During space shuttle reentry, volume-depleted astronauts experience slow-onset, long- duration, low-level +G. In Phase 2, we determined that an extended coverave anti-G suit without an abdominal bladder (Reentry Anti-G Suit (REAGS)) was the most effective anti-G suit in subjects dehydrated with furosemide (Lasix). The present study (Phase 3) verified that REAGS provided effective protection for subjects dehydrated with 7 degrees head-down tilt (HDT) . Twelve healthy male subjects were placed ... |
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| Advanced Technology Anti-G Suit (ATAGS) Fabrication |
DEC 90 |
|
| Authors:
Robert E. Simpson; John Ohlhausen; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| The development and testing of twelve extended coverage Gravity-suits is addressed in this report. These suits were proven superior to the current CSU-13/BP suits at Edwards AFB during flight trails in 1988. Utilizing the comments from the pilots in the 1988 flight trials, the suits discussed in this report improved comfort, donning/doffing and mobility without sacrificing performance. An account of the conceptual, developmental and testing stages of the extended coverage ... |
|
| Centrifuge Experiments on Vestibular Coriolis and Lz Nystagmus |
90 |
21 pages |
| Authors:
Charles M. Oman; B. J. McGrath; P. E. Guedry; A. H. Rupert; MASSACHUSETTS INST OF TECH CAMBRIDGE MAN VEHICLE LAB
|
| The vestibulo-ocular reflex (VOR) and spatial orientation perceptions were recorded in 15 subjects during a 3 Cz centrifuge run. These data were obtained to study two issues; first, to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of C-induced loss of consciousness (C-LOC) training centrifuges. Second, to study the effects of sustained vertical linear acceleration on the vestibular system. The centrifuge run consisted of an ... |
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| Limited Evaluation of the Tactical Flight Combat Suit in the F-16 |
DEC 1989 |
|
| Authors:
George B. Kemper; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This report presents the results of a limited evaluation of the Swedish developed Tactical Flight Combat Suit (TFCS). The TFCS was subjectively compared to the unique pressure breathing for g's (PBG) ensemble, the F-16/PBG. This test was conducted to evaluate the advantages and disadvantages of the TFCS, in comparison to the F-16/PBG, in the 9 g environment of a high performance fighter aircraft. The TFCS used in this test was ... |
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| +Gz Protection in the Future - Review of Scientific Literature |
NOV 89 |
|
| Authors:
Fred Buick; DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
|
| To reduce the incidence of G-induced loss of consciousness and enable pilots to operate their aircraft at higher levels of performance, anti-G protection must be improved. A G-suit and the anti-G straining maneuver will likely remain essential components of any anti-G system,but several methods potentially increasing G-tolerance have been investigated that could supplement the protection afforded by these traditional techniques. Pharmacological agents are of no benefit, while breathing carbon dioxide, ... |
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| A Stress Test to Evaluate the Physical Capacity of Performing L-1 Anti-G Straining Maneuvers |
SEP 88 |
|
| Authors:
Wen-Yaw Chiou; WRIGHT STATE UNIV DAYTON OHIO
|
| To evaluate the physical capacity fo performing L-1 anti -G straining maneuvers (AGSM), 9 subjects participated in stress test protocols which were designed to use repetitive AGSM exercise on the ground. Physiological responses of oxygen uptake (VO2), minute pulmonary ventilation (VE), respiratory exchange ration (RER) and heart rate (HR) were determined for steady state exercise at AGSM duty cycles of 20%, 25%, 33% and 50%. These exercise loads consisted of ... |
|
| G-Induced Loss of Consciousness and Its Prevention |
SEP 1988 |
54 pages |
| Authors:
Earl H. Wood; MAYO CLINIC ROCHESTER MN
|
| The current capabilities of trained individuals to maintain clear vision during sustained exposures to 9 Gz, an increase in protected G tolerance of about 4 G over World War II fighter pilots, is a result of combined use of a G suit and very effective self-protective straining maneuvers such as the M-1, L-1 and pressure breathing, all of which are variants of the Valsalva maneuver developed in the 1940s. However, ... |
|
| Research and Development of Anti-G Life Support Systems. Part 2. Decompression Sickness Research |
MAY 88 |
28 pages |
| Authors:
Robert W. Krutz; Robert M. Olson; Bijan Eshaghian; Emily M. Gause; William T. Harvey; TECHNOLOGY INC SAN ANTONIO TX LIFE SCIENCES DIV
|
| Instrumentation and techniques for differentiating bends-prone and bends-resistant individuals were developed. Studies were conducted to determine bends- and bubble-formation altitudes using a variety of simulated pressure-suit pressures and breathing gas mixtures. A pressure of 9.5 psia eliminated the occurrence of bends under the conditions of these studies. In vitro studies of intravenous bubble formation were undertaken. United States Air Force (USAF) aircrews must be prepared to encounter loss of cabin ... |
|
| A Near-Infrared Spectrophotometric Method for Studying Brain O2 Sufficiency in Man during +Gz Acceleration |
MAR 1988 |
10 pages |
| Authors:
D. H. Glaister; F. F. Joebsis-VanderVliet; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| A technique for the noninvasive monitoring of cerebral oxygen status was evaluated on volunteer subjects on the USAF School of Aerospace Medicine Centrifuge. By using multiwavelength near-infrared spectrophotometry, the instrumentation measured changes in the quantities of reduced and oxygenated hemoglobin (and their sum, an indicator of cerebral blood volume), and the quantity of oxidized cytochrome c oxidase within the forebrain. Test used acceleration of up 9 G with onset rates ... |
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| Prevention of Loss of Consciousness with Positive Pressure Breathing and Supinating Seat |
JAN 88 |
|
| Authors:
John W. Burns; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX CREW TECHNOLOGY DIV
|
| Maintaining vision and consciousness at high sustained +Gz requires a total body effort for most people, and is very fatiguing. Currently, the only pieces of operational G-protective equipment are the anti-G suit and anti-G valve which provide relaxed G-tolerance protection to about 5.5 G. Protection above 5.5 G requires the anti-G straining maneuver (AGSM). Assisted positive pressure breathing (APPB) has been shown to augment sustained +Gz tolerance and reduce the ... |
|
| High-G Training for Fighter Aircrew |
JAN 88 |
|
| Authors:
Kent K. Gillingham; John P. Fosdick; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| USAF fighter aircrew from Tactical Air Command underwent high-G training at the USAF School of Aerospace Medicine, the major objectives of the training being to increase their understanding of G stress and G protection and to raise their G tolerance. The didactics centered on discussion of the G-time tolerance curve and demonstration of an effective anti-G straining maneuver (AGSM). Exposure to G stress on the USAFSAM centrifuge allowed the trainees ... |
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| Proceedings of the SAFE Association Annual Symposium (25th), Held in Las Vegas, Nevada on 16-19 November 1987 |
87 |
|
| Authors:
SAFE ASSOCIATION NEWHALL CA
|
| Partial Contents: Evaluation of full-body harnesses during prolonged motionless suspension of volunteers; Individual ventilator/resuscitator (gas powered individual ventilator) GPV; Attrition of molecular sieve in on board oxygen generating systems; High altitude-low profile positive pressure breathing (HA/LP-PPB) oxygen mask assembly; Space station emergency egress and eva lighting considerations and candidate koch hardware; Evaluation of collective protection systems; Al altered control position for simulating fluid shifts during shuttle launch; Cognitive workload and ... |
|
| United States Air Force Summer Faculty Research Program (1986). Program Technical Report. Volume 3 |
DEC 86 |
1035 pages |
| Authors:
Rodney C. Darrah; Richard Kopka; Susan K. Espy; UNIVERSAL ENERGY SYSTEMS INC DAYTON OH
|
| The United States Air Force Summer Faculty Research Program (USAF- SFRP) is a program designed to introduce university, college, and technical institute faculty members to Air Force research. This three volume document is a compilation of the final reports written by the assigned faculty members about their summer research efforts. Some of the reports in this volume include: A computer-Aided Method of Designing Control Systems Incorporating Aircraft Flying Qualities, Infrared ... |
|
| Incompatibility of the M-1 Maneuver with U.S. Navy Tactical Aircraft Oxygen Systems |
SEP 1986 |
9 pages |
| Authors:
J. T. White; L. M. Morin; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| A spectrum of clinical symptoms consisting of grey-out, black-out, and G-induced loss of consciousness has been identified in pilots of high performance aircraft. The M-1 maneuver used in conjunction with reclined seats and inflated G-suit provides significant protection against these symptoms. Centrifuge-trained United States Navy tactical aircraft pilots have recently reported a decreased ability to perform the M-1 maneuver while using the MBU-12P oxygen mask and CRU-79/P oxygen regulator. This ... |
|
| A Conceptual Model for Predicting Pilot Group G Tolerance for Tactical Fighter Aircraft |
AUG 1986 |
13 pages |
| Authors:
Russell R. Burton; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
|
| A static model based on eye-heart vertical distance has been developed which predicts group mean G tolerances relative to the application of any of the following anti-G methods and/or physiologic responses: anti-G suit, reclined seat, anti-G straining maneuver (AGSM), positive pressure breathing (PPB), gradual onset of G, isometric muscular contraction, and leg elevation. This model was validated with published data. A variation of this model (derived equation) predicts the amount ... |
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| A Pulsating Anti-Gravity Suit for Acceleration Protection: System Description and Preliminary Experiments |
JUL 86 |
|
| Authors:
T. W. Moore; B. R. Reddy; J. Foley; F. Kepics; L. Hrebien; DREXEL UNIV PHILADELPHIA PA BIOMEDICAL ENGINEERING & SCIENCE INST
|
| This document describes a system designed to study the feasibility of augmenting tolerance to acceleration stress using external pressure pulsations synchronized to the electrocardiogram. The system, known as synchronized pulsating anti-gravity suit, consists of a modified G Suit, a controller and a pneumatic subsystem. The modified suit has individual bladders for calf, thigh, and abdomen with separate inlet/outlet ports. A microcomputer controls the synchronization, phasing and sequencing of pressure pulses ... |
|
| An Experimental Microcomputer Controlled System for Synchronized Pulsating Anti-Gravity Suit |
JUL 86 |
|
| Authors:
Thomas Moore; Joanne Foley; B. R. Reddy; Frank Kepics; Don Jaron; DREXEL UNIV PHILADELPHIA PA BIOMEDICAL ENGINEERING & SCIENCE INST
|
| This report describes an experimental system to deliver Synchronized External Pressure Pulsations (SEP) to the lower body. The system is designed using a micro-computer with a realtime interface and an electro-pneumatic subsystem capable of delivering pressure pulses to a modified anti-G suit at a fast rate. It is versatile, containing many options for synchronizing, phasing and sequencing of the pressure pulsations. Details of its software and hardware are described along ... |
|
| Improved Anti-G Suit. |
24 FEB 1986 |
|
| Authors:
Thomas J. Jennings; DEPARTMENT OF THE AIR FORCE WASHINGTON DC
|
| This patent application discloses an improved anti-G suit which incorporates stiffening inserts sized and shaped to cover each inflatable air bladder and inserted between the bladders and the anti-G suit fabric. The stiffeners may be made of polypropylene, neoprene rubber, or a composite structure of Kevlar fabric and polyethylene. A butt strap covers the buttocks of an aircrew member and is secured by belts extending across the abdominal and the ... |
|
| Ultrasonic Quantification of Blood Volume Redistribution under Hypergravity |
15 JAN 86 |
|
| Authors:
Pramode K. Bhagat; David R. Brown; KENTUCKY UNIV LEXINGTON WENNER-GREN RESEARCH LAB
|
| In the operation of high performance aircraft, operational crews are often subject to high sustained + or - GZ acceleration. The response of the human cardiovascular system to these acceleration forces has been the object of considerable research. Numerous techniques have been used to measure important parameters of cardiovascular function; however, plethysmographic measurements of blood volume shifts have not been possible during exposure to hypergravity because of unaboidable tissue deformation. ... |
|
| Simulation of High +Gz Onset in the Dynamic Environment Simulator |
APR 85 |
|
| Authors:
W. B. Albery; T. Jennings; M. Roark; J. Frazier; D. Ratino; AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| This report documents a unique approach of coupling the cab-axis degree of freedom to the main arm motion of the Air Force Aerospace Medical Research Laboratory human centrifuge, or DES (Dynamic Environment Simulator). This technique of simulating high +Gz/sec to 2.875 Gz/sec were investigated and eleven subjects completed the study. Peripheral light loss (PLL), a precursor to loss of consciousness, was recorded in all eleven subjects using this technique. Three ... |
|
| A Servo Controlled Rapid Response Anti-G Valve |
17 OCT 1983 |
21 pages |
| Authors:
Richard J. Crosbie; NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| Current anti-G suits inflate under control of an anti-G valve and apply pressure to the abdominal and leg areas to prevent blood pooling in the lower portions of the body. The anti-G valves employ a spring and mass construction which regulates air flow to the suit in direct proportion to the amount by which the applied G force exceeds a nominal 2G breakout force. This mechanical method, however, does not ... |
|
| USN/USAF Anti-G-Suit Consolidation Program |
22 AUG 1983 |
28 pages |
| Authors:
J. Z. Lewyckyj; NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| As a result of a Standardization meeting between the US Air Force and the US Navy, it was decided that a joint specification would be prepared for an Anti-G Suit. To this end, each service would evaluate the other Services Anti-G Suit and the best features would be combined. This report provides some of the background and a comparison of both suits. It provides a test program on the Air ... |
|
| Interaction of Anti-G Measures and Chest Wall Mechanics in Determining Gas Exchange. |
JUN 1983 |
|
| Authors:
H. I. Modell; VIRGINIA MASON RESEARCH CENTER SEATTLE WA
|
| This project represents an extension of an earlier project designed to examine factors influencing gas exchange during acceleration stress. Included in this report are studies dealing with the influence of the chest wall on regional intrapleural pressure during +Gz stress; influence of G-suit abdominal bladder inflation on gas exchange during +Gz stress; influence of the chest wall on gas exchange during mechanical ventilation; characterization of in vivo pressure-volume relationships of ... |
|
| Interaction of Anti-G Measures and Chest Wall Mechanics in Determining Gas Exchange |
MAY 1983 |
|
| Authors:
Harold I. Modell; VIRGINIA MASON RESEARCH CENTER SEATTLE WA
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| Efforts during this reporting period have been directed in three areas: (1) Examination of regional intrapleural pressure changes during +Gz stress in the pig; (2) Development of an inexpensive assist/control, volume limited animal ventilator; and (3) Determining the influence of chest wall motion on gas exchange during mechanical ventilation in dogs. Studies assessing regional intrapleural pressure changes during +Gz stress in the dog were repeated in similar sized pigs to ... |
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| Proceedings of the SAFE Association Annual Symposium (21st), Held in San Antonio, Texas on 5-8 November 1983 |
83 |
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| Authors:
SAFE ASSOCIATION NEWHALL CA
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| Partial contents: Low bulk suspension lines for parachutes; The development of a dynamic response sensing and recording system for incorporation into a state-of-the art manikin; Factors affecting human tolerance to sustained acceleration; Development and testing of the martin-baker crashworthy seat; USAF aerospace biotechnology research and development; USAFSAM integration laboratory assessments of the advanced chemical defence aircrew respirator (ACDAR); Selectable thrust rocket motor for crew escape systems; Training in the simulated ... |
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| Effects of Anti-G Measures on Gas Exchange |
MAY 1981 |
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| Authors:
Harold I. Modell; UNIV OF WASHINGTON SEATTLE DEPT OF PHYSIOLOGY AND BIOPHYSICS
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| This project was designed to serve as the first step to examine various aspects of gas exchange during high sustained gravitational stress (HSG) and the influence of commonly used protective measures on the gas exchange process during HSG. Studies focused on four apsects of the problem: (1) Effects of G-suit abdominal bladder inflation on oxygen delivery at +1Gz; (2) Interaction of pulmonary mechanics and G-suit bladder inflation during +Gz stress ... |
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| Vectorcardiographic Results of Human Exposures to +3GZ, +5GZ, and +7GZ. |
OCT 1980 |
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| Authors:
M. Harold Laughlin; James E. Whinnery; Donald J. Cosgrove; Edward L. Fitzpatrick; Harold N. Keiser; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
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| Frank orthogonal vectorcardiograms (VCG) were recorded from 10 subjects before, during, and for 15 min after exposures to +3Gz +5Gz, and +7Gz. The order of acceleration exposure was randomized, with the individual exposures separated by at least one week. Standard USAF anti-G suits were worn by all subjects. Detailed analysis of the scalar lead electrocardiograms revealed no abnormalities and no consistent signs of conduction disturbances or ischemic ST-T segment changes. ... |
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| Advanced Low Cost G-Cuing System (ALCOGS). |
JAN 1980 |
77 pages |
| Authors:
Jeffery M. Kleinwaks; SINGER CO BINGHAMTON NY LINK DIV
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| The G-seat is a device that replicates in a flight simulator the pilot/seat interaction due to aircraft acceleration. The G-suit and seat shaker systems provide important cues to the pilot used in the control of the aircraft. These cues are believed to be particularly significant in high performance tactical aircraft. In order to investigate G-cuing philosophies and drive schemes, a system was developed with capabilities exceeding that of present G-cuing ... |
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Reports by Keyword(s)
G SUITS
