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Biomedical subjects

V M Voge

Publications and source records attributed to V M Voge.

28 records · Page 2Linked to original sources
PubMed1989

Freon: an unsuspected problem.

Freon 113 is not usually considered a toxic chemical and is not generally included in toxicology text lists of dangerous chemicals. However, during one 7-year period, the U.S. Navy recorded 38 freon-related mishaps, including 16 chemical burns and 22 inhalation injuries. Several deaths were also recorded. Part of the problem seems to be that freon compounds are excellent degreasing and cleaning agents. Consequently, they are widely and inappropriately used by aviation ground crews for this purpose. Such use usually presents no problem, except when the agent is used in small, closed, unventilated areas. This paper outlines the properties of freon that make it dangerous in the aviation community, some case histories of freon-related mishaps, what the Navy has done to control or prevent the problem from recurring, and the Navy's relative success with its prevention policies.

Aerospace Medicine↗
PubMed1989

Probable bends at 14,000 feet: a case report.

Decompression sickness has not previously been reported at altitudes below 16,000 ft (4,878m), unless the patient had been previously exposed to hyperbaric conditions (SCUBA). There are some underdocumented reports at lower altitudes. We are reporting a suspected case of bends appearing at 14,000 ft (4,268m) in a young student Naval aviator. The patient's only predisposing factors were an old athletic injury repaired with a permanently retained screw (foreign body) and a regular exercise program. A short discussion of bends is included.

Adult↗
PubMed1988

IgA nephropathy in a student naval aviator.

Microscopic hematuria is not infrequently seen in the aviator population. After appropriate evaluation, excluding renal biopsy, such a finding is commonly diagnosed as "benign microscopic hematuria," and no further action is taken. The clinical case presented here involves a student naval aviator whose only findings were microscopic hematuria and a unilateral high-frequency hearing loss. A renal biopsy was performed to rule out another diagnosis and IgA nephropathy was found incidentally. He was subsequently denied clearance to fly because of the uncertain outcome of the disease. Berger's disease is discussed fully as to its clinical picture, diagnosis, treatment, and prognosis.

Adult↗
PubMed1987

Bulimia: an uncommon problem in aircrewmen--a case report.

This is a case report of a male naval aviator suffering from bulimia. Bulimia is an eating disorder normally associated with young affluent females. A review of bulimia as to etiology, characteristics, prevalence, diagnosis, treatment, and prognosis is presented to familiarize the reader with the disease. About 1% of the U.S. male population is afflicted with this disorder, while it has been estimated that up to 22% of females are afflicted. The only documented case of bulimia in a male aircrewman is presented. He was misdiagnosed on several occasions. When diagnosed, his symptomatology was severe. He was offered psychotherapy and close medical supervision and allowed to return to flight duty. His disease was chronic and recurrent. He was eventually grounded again. It is felt that bulimics are a very poor risk for return to flight duty due to the recurrent nature of the disease, the manipulative characteristics of those afflicted and the extreme difficulty of following patients suffering from this illness.

Adult↗
PubMed1986

Spontaneous pneumothorax in the USAF aircrew population: a retrospective study.

Spontaneous pneumothorax (SP) is infrequently diagnosed in aircrew personnel. However, once it is diagnosed, aircrew disposition becomes a serious concern. To evaluate this problem, a literature review was conducted to put the disease into proper perspective. A questionnaire was then sent to all aircrew in the United States Air Force waiver file who had suffered SP in order to gain a retrospective view of problems and situations encountered. The following areas were investigated: recurrences, height, weight, age, smoking history, initial medical management, symptomatology, activity at time of occurrence, relationship to flight duties, treatment given and personal/family history of lung disease. A review of FAA, military, and NASA guidelines regarding personnel with a history of SP was also done. It is concluded that SP is an unrecognized hazard to aircrew personnel. Once an SP has been diagnosed in an individual, he/she should be grounded from further flight duties until either 9 years have elapsed without a recurrence or there has been a bilateral parietal pleurectomy.

Adult↗
PubMed1981

Role of pre-existing disease in the causation of naval aircraft mishaps.

Pre-existing disease is present in Naval aircraft mishaps, but there is presently no indication that it actually causes, or even contributes to, the mishap sequence. This paper reviews the literature on this subject and analyzes the evidence available. Naval aviators are a healthy, watched-over, well-defined young population. Diagnosed pre-existing disease which could be incapacitating is disqualifying for aviation duty. The pre-existing disease reported in Medical Officer's Reports usually would not be incapacitating. However, a disease process may present and contribute significantly to a "pilot error" or "undetermined" mishap, and not be found at autopsy.

Accidents, Aviation↗
PubMed1980

Acceleration forces on the human subject.

An overall view of the methodology of acceleration research, i.e. G-tolerance measuring devices and the peculiarities of each, general information on G tolerance and types of G stress, the methods of determining G tolerance, and the methods of modifying one's G tolerance, is presented. Some human factors aspects of G tolerance, as well as some physiologic changes under G, i.e. ECG changes, cardiac problems, and various other biochemical and hematological alterations, are discussed. Special emphasis is placed on the proven G-associated cardiac pathology found in various animal models, and its possible application to the human subject.

Acceleration↗
PubMed1978

Comparison of several G-tolerance measuring methods at various seatback angles.

The most commonly accepted endpoint indicative of impending "blackout" for subjects (Ss) exposed to +GZ on a centrifuge is peripheral light loss (PLL). A comparison was made using PLL and cessation of bloodflow in the temporal artery, as measured in eight Ss with an externally mounted ultrasonic flowmeter using the doppler effect. Each relaxed S was exposed to increasing G (onset rates of 0.1 and 0.3 G/s), while positioned at seatback angles of 15 degrees, 60 degrees, and 75 degrees. In addition to the flowmeter, arterial oxygen saturation was monitored with an ear oximeter, and respiration and ECG were recorded. Tolerance to G loads was slightly greater with the more rapid rate of G onset. While use of the flowmeter resulted in obtaining reliable G tolerance endpoints in all cases, in only about 75% of these cases was the same true for PLL. Responses obtained from the ear oximeter were variable and delayed, showing only slight decreases in arterial saturation, which became more pronounced as the G-load exposure duration increased.

Acceleration↗
PubMed1977

Psycho-physiological assessment of acceleration-induced changes in various seat configurations.

Ten subjects were exposed to high-G on the human centrifuge using seatback angles of 13 degrees, 30 degrees, 45 degrees, 60 degrees, and 75 degrees from the vertical, and body configurations of the lower portion of the body with pelvis and legs elevated, pelvis, elevated, and pelvis elevated with knees on chest (fetal position). Tolerance was measured by peripheral light loss. Mental status, respirations, core and ambient temperatures, and ECG were monitored. Daily physio-chemical data included: creatinine, bilirubin, phosphorus, alkaline phosphatase, uric acid, cholesterol, total protein, albumin, BUN, glucose, LDH cardiac isoenzyme No. 5, SGOT, SGPT, CPK, CBC, and urinalysis. Tiredness, pressure on the chest, and general discomfort in the fetal position were reported. Physical examination demonstrated petechiae. Heart rate, respiratory rate, and temperature increased post-session. There was a significant rise in values for albumin, chloride ion, creatinine, calcium, LDH, BUN, and immature white cells; and a decrease in values for phosphorus, SGOT, SGPT, protein, uric acid CO2, globulin, hematocrit, monocytes, and eosinophils.

Acceleration↗