| Metabolizable Energy Intakes and Nitrogen Balance during Saturation Diving |
FEB 93 |
30 pages |
| Authors:
J. W. Thorp; W. V. Rumpler; J. L. Seale; J. M. Conway; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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 | Body compositions and energy and nitrogen balances were measured during a study to define nutrient requirements in saturation diving. Divers were studied at the surface and during saturation dives at pressures of 0.56 and 3.17 MPa. A controlled diet provided 15.06 MJ and about 100 gm of protein daily with 30% of energy from fat. In balance studies, a duplicate of each meal and all urine and feces were collected. ... |
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| Methods to Obtain Blood Samples Periodically During Exercise Research Studies While Subjects are Immersed in Water or Otherwise Inaccessible |
JAN 93 |
14 pages |
| Authors:
J. W. Thorp; J. R. Roberts; T. J. Doubt; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| We describe a method to obtain periodic blood samples during exercise studies by use of an indwelling intravenous catheter. A step-by-step process for establishing the intravenous line and obtaining samples is also described. Steps we have found especially useful to facilitate the process and to avoid complications are presented in more detail. A list of supplies required for the process is included. With these methods, we have been able to ... |
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| Weight Loss After AM and PM SDV Dives and Use of DDAVP |
SEP 92 |
45 pages |
| Authors:
T. J. Doubt; J. W. Thorp; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| Post-dive weight loss, as an estimate of body fluid loss, was obtained in 13 SEALs after 28 daytime (AM) and 66 nighttime (PM) man-dives in a SEAL Delivery Vehicle (SDV). Water temperature was 26 C. AM weight loss averaged 1.25+ or - O.l4 kg for the 166+ or - 8 min dives; there was no ignificant correlation between weight loss and dive time. Nine divers received desamino-8- D-argnine (DDAVP, 20 ... |
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| Recommended Dietary Menus for Use in Operational and Research Saturation Diving |
MAY 91 |
46 pages |
| Authors:
J. W. Thorp; T. J. Doubt; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| This report describes fifteen daily menus suitable for divers participating in research or operational saturation dives. The menus were developed and tested for acceptability during a series of research saturation dives at the Naval Medical Research Institute. Each menu provides 3500 - 3600 kcal per day for each diver, with about 30% of energy provided by fat and 10 - 15 % from protein. The foods are readily available, simple ... |
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| Preliminary Diet and Hydration Guidelines for Diving to Depths to 150 FSW |
APR 91 |
36 pages |
| Authors:
T. J. Doubt; J. W. Thorp; P. A. Deuster; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| This report provides a brief review of dietary and hydration changes associated with immersion and hyperbaric exposures to a depth of 150 feet seawater (fsw), and recommendations for ensuring adequate fluid and caloric status. Significant loss of body fluid will occur with immersion. Fluid replacement during immersion does not totally reverse this finding. Adequate predive hydration is required, especially in hot environments, and can be judged adequate if the urine ... |
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| Pyridostigmine and Warm Water Diving Protocol 90-05. 5. Hydration Status |
DEC 90 |
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| Authors:
D. M. Stevens; D. Hyde; K. J. Haberman; J. W. Thorp; T. J. Doubt; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
 | Hydration status and changes in venous blood levels of lactate and glucose were measured in divers exposed to heat and warm water after taking pyridostigmine in doses used for prophylaxis against chemical nerve gas agents. Ten heat-acclimated U.S. Navy divers spent 4 h in a hot air environment (100 F, 50% humidity) followed by 3 h immersed in warm water in a chamber pressurized to the equivalent of 20 feet ... |
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| Work Enhancement and Thermal Changes during Intermittent Work in Cool Water after Carbohydrate Loading |
MAR 90 |
36 pages |
| Authors:
J. W. Thorp; K. D. Mittleman; K. J. Haberman; J. F. House; T. J. Doubt; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| We evaluated the effect of carbohydrate loading (TEST) vs control diet (CON) on the thermal status and the ability of 8 U.S. Navy divers to perform intermittent leg exercise at 80% max Oxygen 2 consumption during head- out immersion in 25 deg C water. Each subject was tested once after 3 days of the TEST diet (600 grams carbohydrate/day and once after 3 days of CON diet (less than 300 ... |
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| Dietary Plans for Carbohydrate Loading |
NOV 89 |
48 pages |
| Authors:
T. J. Doubt; J. W. Thorp; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| This report provides dietary plans suitable for carbohydrate loading (i.e., increasing carbohydrate intake in order to increase body glycogen stores) . Two separate 7 day diet plans are presented, with the daily intake of 600 gm carbohydrate for each menu. One diet plan, NMRI-20, provides the necessary carbohydrate with 20% of the calories derived from fat (total calories approx. 3600 kcal/day). The second diet plan NMRI-30, provides the same amount ... |
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| Blood PO2 and pH in Monkeys after Incapacitating Doses of Ionizing Radiation. |
JUN 1972 |
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| Authors:
J. W. Thorp; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Aortic blood PO2 and pH and internal jugular blood PO2 were measured continuously in monkeys (Macaca mulatta) that received a 3000-rad midline tissue dose pulse of mixed gamma-neutron radiation. Immediately after irradiation the aortic blood PO2 and pH increased slightly (5 to 10 torr and 0.05 pH unit, respectively); these changes were consistent with earlier reports that monkeys hyperventilated after similar irradiation. Venous blood PO2 did not change after irradiation. ... |
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| Neutron Effectiveness for Causing Incapacitation in Monkeys. |
APR 1972 |
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| Authors:
J. W. Thorp; R. W. Young; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Fifty-eight male monkeys (Macaca mulatta) were trained by shock avoidance conditioning to work a simultaneous visual discrimination problem. Trained subjects were irradiated in either a nuclear reactor-produced neutron field (incident neutron to gamma ray ratio of about 10) or a similarly produced gamma ray field (incident neutron to gamma ray ratio of about 0.1). In all exposures the midbrain dose rate was about 2000 rads/minute. The midbrain dose most likely ... |
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| Monkey Performance After Partial Body Irradiation: Dose Relationships, |
NOV 1970 |
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| Authors:
J. W. Thorp; R. W. Young; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Forty-one male and thirty female monkeys (Macaca mulatta) were trained by shock avoidance conditioning to work a simultaneous visual discrimination problem. Trained subjects received either 2500, 4500, or 10,000 rads (midline tissue doses) of pulsed mixed gamma-neutron radiation. Within each dose group some animals were head shielded, some were trunk shielded, and some were not shielded. The midline tissue dose behind the shield (at the middle of the head or ... |
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| Beagle and Miniature Pig Response to Partial Body Irradiation: Dose Relationships. |
OCT 1970 |
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| Authors:
J. W. Thorp; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Beagles and miniature pigs were exposed individually to a pulse of mixed gamma-neutron radiation. Either the head or trunk was shielded, and the midline tissue dose behind the shield (at the middle of the head or trunk) was less than 7 percent of the dose to the same point when no shield was in place. After exposure, the presence or absence of clinical signs of central nervous system damage and ... |
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| CARDIOVASCULAR RESPONSE OF BEAGLES TO A SUPRALETHAL DOSE OF MIXED GAMMA-NEUTRON RADIATION, |
MAY 1970 |
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| Authors:
C. L. Turbyfill; J. W. Thorp; D. Wise; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Unshielded, head-shielded or trunk-shielded beagles were irradiated with a 19,000-rad midline tissue dose of pulsed mixed gamma-neutron radiation. The cardiovascular response of the beagle and its alteration by shielding were evaluated. Arterial pressure, blood volume, heart rate, and some plasma chemistry values were determined before and for 1 hour following irradiation. Immediately after irradiation the blood pressure increased in all groups. This prompt hypertension gradually decreased until by 4 minutes ... |
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| THE ACUTE MORTALITY RESPONSE OF BEAGLES TO PULSED, MIXED GAMMA-NEUTRON RADIATIONS, |
JUN 1968 |
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| Authors:
T. J. Pitchford; J. W. Thorp; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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| Eighty-one beagle dogs were exposed unilaterally to mixed gamma-neutron radiations from the AFRRI-TRIGA reactor. Nine groups received midline tissue doses ranging from 155 to 236 rads. Radiations were delivered in a single pulse with 80 percent of the dose delivered in less than 70 milliseconds. The LD50/60 was 210 rads. Survival times ranged from 10 to 25 days, and the mean was 16.5 days. The radiation effects were most prominent ... |
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